YOKOGAWA WT500 User Manual Download Page 356

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Index-1

IM 760201-01E

Index

CF ....................................................................................... 4-29

Change Item menu ............................................................... 5-3

character strings, entering .................................................. 3-28

Charge/Discharge setting ................................................... 5-31

Clear Trend Exec menu item .............................................. 8-12

Color item ......................................................................... 10-12

Comment item .................................................. 9-9, 10-7, 10-13

comments .................................................................... 9-9, 10-7

Compression item............................................................. 10-13

Configuration item ............................................................... 11-7

Contents Settings menu item ............................................... 9-3

continuous integration mode .............................................. 5-23

Control Settings menu item ........................................... 9-2, 9-5

Copy Exec menu item ...................................................... 10-24

Copy menu item ............................................................... 10-22

Count item .......................................................................... 4-26

crest factor ................................................................. 2-15, 4-29

Crest Factor item ................................................................ 4-29

CSV Convert item ................................................................. 9-9

CT item ............................................................................... 4-17

CT ratio ............................................................................... 4-17

current input terminal ................................................. 3-14, 3-21

current integration mode..................................................... 5-32

Current item ........................................................................ 4-13

current range ........................................................................ 4-7

CURSOR key ............................................................ 6-17, 8-13

cursor measurement......................................... 6-15, 7-17, 8-13

cursor path.......................................................................... 7-19

Cursor Path item................................................................. 7-19

cursor positions .................................................................. 8-14

cutoff frequency ......................................................... 4-23, 6-13

Page

data update rate ........................................................ 2-13, 4-24

date..................................................................................... 3-24

Date/Time menu item ......................................................... 3-24

date and time ...................................................................... 3-24

default gateway ................................................................... 11-4

Delete Exec menu item .................................................... 10-20

Delete menu item ............................................................. 10-19

Delta>Star setting ............................................................... 5-44

delta computation ............................................... 2-21, 5-6, 5-42

delta computation mode ..................................................... 5-42

delta computation type ....................................................... 5-42

Delta Measure menu item .................................................. 5-42

Delta Measure Settings dialog box ..................................... 5-42

delta wiring ..................................................................... App-15

Dest Dir menu item ........................................................... 10-23

DHCP .................................................................................. 11-3

Difference setting ................................................................ 5-43

display ................................................................................ 3-31

displayed item order, resetting.............................................. 5-5

displayed items, number of................................................... 5-2

display resolution ................................................................ 2-16

Display Settings item ........................................................... 8-11

Display Settings menu item ................................................ 7-13

distorted wave ................................................................ App-18

distortion factor .......................................................... 2-21, 6-12

DNS item ............................................................................. 11-3

domain name ....................................................................... 11-5

Domain Name item .............................................................. 11-5

Dual List menu item .............................................................. 5-2

Symbols

Page

ΔF Mode item

..................................................................... 5-42

1/Fundamental setting ........................................................ 6-12

1/Total setting ..................................................................... 6-12

104 keyboard .................................................................. App-29

109 keyboard .................................................................. App-31

180 Lead/Lag setting .......................................................... 5-13

360 degrees setting ............................................................ 5-13

3P3W>3V3A setting ........................................................... 5-43

758931................................................................................ 3-10

Page

Abort item ........................................................................... 10-7

accessories, optional ............................................................... iv

accessories, standard.............................................................. iii

AC component .................................................................. App-1

ac power ......................................................................... App-16

active power ............................................................ 5-6, App-17

adapter ............................................................................... 3-10

aliasing ............................................................................... 2-28

All Items menu item .............................................................. 5-2

All OFF setting ............................................................... 7-3, 8-3

All ON setting................................................................. 7-3, 8-3

All Reset menu item .............................................. 10-20, 10-23

All Set menu item .................................................. 10-20, 10-23

All setting ............................................................................ 10-8

alternating current, vector display of............................... App-14

ambient humidity .................................................................. 3-3

ambient temperature ............................................................ 3-3

angular velocity............................................................... App-13

anti-aliasing filter................................................................. 6-13

apparent and reactive power equation ................................ 5-11

apparent power...................................... 2-19, 5-6, 5-1 1, App-17

apparent power equation ..................................................... 5-11

ASCII .................................................................................. 9-10

attenuation constant ........................................................... 4-26

Auto Cal item ...................................................................... 5-30

Auto Naming item ............................................. 9-9, 10-7, 10-14

auto range ................................................................... 2-11, 4-9

auto scaling .......................................................................... 8-7

Auto setting.................................................................. 7-11, 8-7

average active power ................................................ 2-20, 5-40

average count ..................................................................... 4-26

averaging ............................................................................ 2-14

Averaging menu item .......................................................... 4-26

Page

Bar Cursor item .................................................................. 6-17

Bar Form menu................................................................... 6-16

bar graph display ................................................................ 2-34

bar graph display range ...................................................... 6-16

bar graph display split screens, number of ......................... 6-16

bar graphs .......................................................................... 6-15

Bar Items menu .................................................................. 6-15

Bar menu item .................................................................... 6-15

binary .................................................................................. 9-10

bind, executing .................................................................... 11-6

block diagram ....................................................................... 2-2

Page

CAL key .............................................................................. 12-3

capacity .......................................................................... App-19

Index

App

Index

Summary of Contents for WT500

Page 1: ...IM 760201 01E 1st Edition Power Analyzer ...

Page 2: ...ing YOKOGAWA products YOKOGAWA provides registered users with a variety of information and services Please allow us to serve you best by completing the product registration form accessible from our homepage http www yokogawa com tm PIM 103 02E ...

Page 3: ...ce of the figures given in this manual may differ from the appearance of your actual display Every effort has been made in the preparation of this manual to ensure the accuracy of its contents However should you have any questions or find any errors please contact your nearest YOKOGAWA dealer Copying or reproducing all or any part of the contents of this manual without the permission of YOKOGAWA i...

Page 4: ...rd D UL CSA standard power cord F VDE standard power cord Q BS standard power cord R AS standard power cord H GB standard power cord CCC compatible Options C1 GP IB interface C7 Ethernet interface EX1 External sensor input only selectable with the 760201 EX2 External sensor input only selectable with the 760202 EX3 External sensor input only selectable with the 760203 G5 Harmonic measurement DT De...

Page 5: ...are two feet in a pair Current input protective cover B9319BX 1 Comes with two screws Safety terminal adapter set 758931 See the note on the right Same number of sets as the number of installed input elements 760201 One set with one hexagonal socket wrench 760202 Two sets with one hexagonal socket wrench 760203 Three sets with 1 hexagonal socket wrench User s Manual IM760201 01E 1 This manual Comm...

Page 6: ... set For the 758917 measurement lead Rated voltage 1000V Fork terminal adapter set 758921 1 Two pieces in one set For the 758917 measurement lead Rated voltage 1000 V Rated current 25 A BNC BNC 366924 1 42 V or less Length 1 m Measurement lead 366925 1 42 V or less Length 2 m External sensor cable B9284LK 1 For connecting the current sensor input connector of the WT500 Length 0 5 m Conversion adap...

Page 7: ...in this manual the protection provided by the instrument may be impaired Yokogawa Electric Corporation assumes no liability for the customer s failure to comply with these requirements The following symbols are used on this instrument Handle with care To protect the instrument and its users refer to the explanation in the User s Manual or Service Manual Electric shock danger Alternating current Bo...

Page 8: ...the protective earth terminal Doing so may result in electric shock or damage to the instrument Do Not Operate with Defective Protective Grounding or Fuses Do not operate the instrument if its protective grounding or one of its fuses might be defective Check the grounding and the fuses before operating the instrument Do Not Operate in an Explosive Atmosphere Do not operate the instrument in the pr...

Page 9: ... EC marking requirement This marking indicates that you must not discard this electrical electronic product in domestic household waste Product Category With reference to the equipment types in the WEEE directive Annex 1 this product is classified as a Monitoring and Control instrumentation product Do not dispose in domestic household waste When disposing products in the EU contact your local Yoko...

Page 10: ...bols Used in Procedural Explanations The procedural explanations in chapters 3 to 13 use the following symbols characters and words to identify their contents Procedure Follow the order of the step numbers when carrying out procedures Procedural explanations assume that the procedures are being performed for the first time You may not need to perform every step in a procedure when you are altering...

Page 11: ...on Select the measurement method Wire the circuit that you will measure Set the measurement conditions Read the precautions in sections 3 5 and 3 7 thoroughly before connecting the wires Also if necessary assemble the input terminal adapter that connects to the voltage input terminal see section 3 6 before connecting the wires RGB video signal VGA output optional Send data through USB or the optio...

Page 12: ...ch On and Off 3 6 3 5 Precautions for Wiring the Circuit That You Will Measure 3 8 3 6 Assembling the Adapter for the Voltage Input Terminal 3 10 3 7 Wiring for Accurate Measurements 3 12 3 8 Guide for Selecting the Method Used to Measure the Power 3 13 3 9 Wiring the Circuit That You Will Measure for Direct Input 3 14 3 10 Wiring the Circuit That You Will Measure with a Current Sensor 3 17 3 11 W...

Page 13: ...On or Off 5 30 5 11 Selecting a Watt Hour Integration Method for Each Polarity 5 31 5 12 Selecting a Current Integration Mode 5 32 5 13 Setting User Defined Functions 5 33 5 14 Setting the MAX Hold Feature 5 38 5 15 Measuring the Average Active Power 5 40 5 16 Selecting What Frequency to Measure 5 41 5 17 Setting Delta Computation Optional 5 42 Chapter 6 Harmonic Measurement Optional 6 1 Panel Key...

Page 14: ... 10 Saving and Loading Data 10 1 Panel Keys and Setup Menus Used in This Chapter 10 1 10 2 About USB Memory 10 2 10 3 Saving Setup Parameters Waveform Display Data and Numeric Data 10 4 10 4 Saving Screen Image Data 10 12 10 5 Loading Setup Parameters and Displaying File Properties 10 16 10 6 Deleting Files 10 19 10 7 Copying Files 10 22 Chapter 11 Ethernet Interface Optional 11 1 Panel Keys and S...

Page 15: ...and slave synchronization signals and clock input 14 15 14 8 RGB Video Signal VGA Output Optional 14 15 14 9 USB PC Interface 14 16 14 10 USB PERIPHERAL Interface 14 16 14 11 GP IB Interface Option 14 16 14 12 Ethernet Interface Option 14 17 14 13 Safety Terminal Adapter 14 17 14 14 General Specifications 14 18 14 15 External Dimensions 14 19 Appendix Appendix 1 Symbols and Determination of Measur...

Page 16: ...he screen at the same time the WT500 uses pages to display measured values You can switch between pages using PAGE and PAGE see section 5 1 Rear Panel Input element 1 see section 2 3 Input element 2 Input element 3 Ethernet port optional see section 11 2 Power connector see section 3 3 USB port PC See the Communication Interface User s Manual IM760201 17E CD ROM External clock input External start...

Page 17: ...1 2 IM 760201 01E Top Panel Handle Vent holes see section 3 2 for details There are inlet holes on the bottom panel 1 1 Front Panel Rear Panel and Top Panel ...

Page 18: ...dialog boxes to set values to select digits when setting numbers and to select menu items SET Use this key to display menus that you select with the cursor keys confirm items and values and open a menu for changing displayed items when the menu display is turned off in a numeric data display ESC Use this key to close setup menus and dialog boxes and to move up a level in a menu SHIFT ESC RESET Key...

Page 19: ...ons The following items appear in the Setup menu Wiring See sections 4 1 4 2 5 7 and 5 8 Select this item to display a menu for selecting the wiring system configuring individual input element settings setting the efficiency equation etc Ranges See sections 4 3 and 4 4 You can select this item to set the voltage current or current sensor range just as you can with the panel RANGE keys If you selec...

Page 20: ...requencies to measure Because models with the frequency measurement option measure all voltages and currents this menu will not appear Harmonics See sections 6 3 to 6 5 This item only appears on models with the harmonic measurement option Select this item to display a menu for setting the PLL source the measured harmonic orders and the equation for the harmonic distortion factor in harmonic measur...

Page 21: ...r selecting and zooming in on the displayed waveforms OTHERS See sections 3 16 6 7 6 8 7 2 and 8 2 Use this key to switch between the Trend Bar Graph and Vector displays Each time you press OTHERS the display switches in this order Trend Bar Vector Trend and so on Only appears on models with the harmonic measurement option FORM See sections 5 2 6 2 6 7 6 8 7 4 7 5 7 7 7 8 and 8 6 to 8 9 Use this k...

Page 22: ...alid This key is invalid when the WT500 is in local lockout mode SHIFT LOCAL KEY LOCK Key Combination Use this key combination to turn the key lock on or off When the key lock is on no keys or key combinations other than SHIFT LOCAL are valid and LOCK appears in the upper right of the screen MISC Use this key to display a menu for viewing the system status initializing setup parameters configuring...

Page 23: ...n 4 8 Frequency filter see section 4 8 NULL feature see section 12 4 Page bar see section 5 2 Input element setup parameters Measurement range see sections 4 4 to 4 5 Wiring system see section 4 2 Integration setting status see section 5 11 Data update count see section 5 2 Data update rate see section 4 9 Non Numeric Displays Overload Displayed if the measured value exceeds 140 of the measurement...

Page 24: ...VOLTAGE CURRENT EXT Object Being Measured VT CT Voltage Apply one or the other Current Apply one of them Current sensor optional Input element External clock input Master slave sync signal USB keyboard Internal memory Stores numeric data USB memory CRT Numeric data Waveform display data Screen image data Stored data Setup parameters Numeric data Waveform display data Screen image data Setup parame...

Page 25: ...r that is received at the current sensor input connector is normalized using the voltage divider and the operational amplifier op amp It is then sent to a current A D converter The current signal that is applied to the current input terminal is converted to a voltage signal by a shunt Then it is sent to the current A D converter in the same fashion as the voltage signal from the current sensor The...

Page 26: ... available For details about the determination of measurement function data see appendix 1 U voltage Urms Umn Udc Urmn Uac I current Irms Imn Idc Irmn Iac P active power S apparent power Q reactive power λ power factor f phase difference fU fI also expressed as FreqU FreqI measures the frequencies of up to two voltage current signals 2 U pk U pk maximum minimum voltage values I pk I pk maximum min...

Page 27: ...the average value of a DC input signal or the DC component that is superimposed on an AC input signal Udc or Idc 1 T 0 T f t dt Uac and Iac AC component This function determines the AC component of the voltage or current The function calculates the square root of the square of the true rms value minus the square of the DC component Uac Urms2 Udc2 Iac Irms2 Idc2 or Urmn and Irmn Rectified mean valu...

Page 28: ...The measurement function of a wiring unit is called a Σ function For example UrmsΣ corresponds to the average of the voltages of the input elements that are assigned to the wiring unit The average represents the true rms value Wiring System and Wiring Unit Configuration Example Voltage input Current input Three phase three wire 3 Element 1 Element 2 Element 3 Single phase two wire Wiring system Wi...

Page 29: ...rentheses No No No No No No No No No No No No Yes Yes Yes U I P S Q λ φ φU φI Uhdf Ihdf Phdf Uthd Ithd Pthd Characters or Numbers in Parentheses Measurement Function Yes Numeric data available No No numeric data available Functions with parentheses will produce different values depending on which of the following is contained in their parentheses total The total value is displayed dc The dc compon...

Page 30: ...ltage of element 1 U1 1 and the fundamental voltage of element 3 U3 1 fU1 I1 The phase difference between the fundamental voltage of element 1 U1 1 and the fundamental current of element 1 I1 1 fU1 I2 The phase difference between the fundamental voltage of element 1 U1 1 and the fundamental current of element 2 I2 1 fU1 I3 The phase difference between the fundamental voltage of element 1 U1 1 and ...

Page 31: ...verage of the fundamental voltages of the input elements that are assigned to the wiring unit PLL Source See section 6 3 for operating instructions To measure harmonics the fundamental period the period of the fundamental signal that will be used to analyze the harmonics must be determined The signal for determining the fundamental period is the PLL phase locked loop source For stable harmonic mea...

Page 32: ...ising or falling slope within the data update interval the entire data update interval is set as the measurement period You can select which input signal will be the synchronization source synchronized to the zero crossing point of the input signal for each element You can set the synchronization source signal to the voltage current or external clock input signal For details see appendix 6 1 Trigg...

Page 33: ...to the average of the voltages of the input elements that are assigned to the wiring unit The average value represents the true rms value Wiring System Patterns The following table shows the relationship between the number of installed input elements the selectable wiring system patterns and the assignment of input elements to wiring unit Σ For example there are four wiring system patterns on a WT...

Page 34: ...currently set measurement range The measurement range is increased when the crest factor is set to 3 and the peak value of the input signal exceeds 330 of the currently set measurement range or when the crest factor is set to 6 and the peak value of the input signal exceeds 660 of the currently set measurement range Range Decrease The measurement range is decreased when the data of the measurement...

Page 35: ... E Active power P E PS PS E Apparent power S E SS SS E Reactive power Q E QS QS E Max Min current value Ipk E IpkS current sensor output IpkS E When Applying Voltage or Current Signals through an External VT or CT VT ratio and CT ratio You can convert the input signal into the numeric data or waveform display data of the voltage or current before transformation by setting the VT ratio CT ratio and...

Page 36: ...ency filter is inserted into the frequency measurement input circuit and affects frequency measurements It affects the detection of the measurement period for voltage current and power measurements see section 4 7 and appendix 5 The frequency filter is also used to accurately detect the zero crossing see section 2 2 and appendix 5 The frequency filter is not inserted into the voltage current and p...

Page 37: ...at has been exponentially averaged n 1 times Mn Measured data at the nth time K Attenuation constant can be selected from 2 4 8 16 32 and 64 Moving Average Numeric data can be linearly averaged using a specified average count Averaging is performed according to the following equation Dn Mn m 1 Mn 2 Mn 1 Mn m Dn Displayed value obtained by linearly averaging m points of numeric data from the n m 1 ...

Page 38: ...ecifications of the measurement instrument the crest factor defined at the rated input the signal can be measured by setting a greater measurement range For example even if CF is set to 3 measurement is possible for signals with a crest factor greater than or equal to 5 when the measured value rms value is less than 60 of the measurement range If the minimum effective input 1 of the measurement ra...

Page 39: ...of the element with the lowest display resolution of the target elements For information about the display resolution for integration see section 5 8 Numeric Display during Normal Power Measurement See section 5 1 for operating instructions Selecting the Number of Displayed Items The number of items can be selected from 4 8 16 Matrix and All Items Not all of the data will fit onto a single screen ...

Page 40: ...d the number of displayed items You can set the displayed items on each page The page can be scrolled to switch the page and the displayed items can be changed collectively Page 1 Page 2 Page 3 Page 4 Display example Displays the voltage current power and power factor of elements 1 to 3 on pages 1 to 3 Displays the voltage current power and power factor of wiring unit Σ on pages 4 Page bar The cur...

Page 41: ...d Phdf are displayed when the selected measurement function are U I and P respectively Numeric data of each harmonic order Measurement function display Data related to all harmonics Dual List The data from two different measurement functions can be displayed in two separate columns The selectable measurement functions are U I P S Q λ f fU and fI Measurement function 1 Measurement function 2 Data o...

Page 42: ...they are defined by the following equations Active power P UIcosf 1 Reactive power Q UIsinf 2 Apparent power S UI 3 U rms voltage I rms current f Phase difference between voltage and current The power values are related as follows Apparent power S 2 Active power P 2 Reactive power 2 4 The three phase power is the sum of the power of each phase These definitions only apply for sine waves The measur...

Page 43: ...direction and the other format displays lead up to 180 in the counterclockwise direction D and lag up to 180 in the clockwise direction G In harmonic measurement optional the phase differences between harmonics 1 to 50 of the voltage and current signals are displayed using a 360 format or a 180 format with no sign for lead and a negative sign for lag User Defined Functions See section 5 13 for ope...

Page 44: ... on a single phase three wire system or on a three phase three wire system when using 2 elements T R S T R S Using the data from a three phase four wire system the data of a delta connection can be computed from the data of a star connection star delta transformation R S T R S T Using the data from a three phase three wire system three voltage three current method the data of a star connection can...

Page 45: ...re hours consumed 6 q negative ampere hours returned to the power supply 7 WS volt ampere hours 8 WQ var hours and 9 Time integration time Watt Hour Integration Method for Each Polarity See section 5 11 for operating instructions For positive and negative watt hours WP and WP you can set the integration equation to determine the DC or AC watt hours DC watt hours are computed by integrating each sa...

Page 46: ...ee section 5 6 for details integration is stopped and the integration time and integrated value at that point are held Integration time Reset Start Integrated value Stop Start Reset Hold Hold Hold Hold When STOP is pressed or the maximum integration time is reached When the integrated value upper limit is reached Normal Integration Mode Integration continues for a specified amount of time which is...

Page 47: ...ntegrated value at that point are held Start Reset Integration time Integrated value Hold Hold Timer value Timer value Timer value Press STOP Real Time Normal Integration Mode You specify the dates and times when integration will start and end When the specified stop time is reached or when the integrated value reaches its maximum or minimum displayable value integration is stopped and the integra...

Page 48: ...interval specified by the timer When the amount of time specified by the timer elapses integration resets and starts again When the specified stop time is reached or when the integrated value reaches its maximum or minimum displayable value integration is stopped and the integration time and integrated value at that point are held Integration time Integrated value Hold Hold Timer value Timer value...

Page 49: ... Vrms the display range is set so that the top of the screen is 300 Vpk 50 Vrms 6 and so that the bottom is 300 Vpk 50 Vrms 6 with the zero input line at the center The waveform is clipped if this range is exceeded 1 grid division 300 V 1 grid division 100 V When measured with a measurement range of 100 Vrms When the same signal is measured with a measurement range of 300 Vrms Input zero line 300 ...

Page 50: ... waveform data in each raster Therefore the number of waveform display data points the number of points displayed on the screen for a single input signal is 1002 Extraction of waveform display data from waveform sampling data p p compression This example assumes that a 2 Hz sine wave is measured at a data update rate of 1 s To display this waveform on the WT500 screen the number of data points is ...

Page 51: ...he high frequency components in the signal are misread as low frequency components This is called aliasing Aliased signal Input signal Sampled points Sampling of waveform display data The WT500 samples waveform display data and stores it to memory at a rate of approximately 100 kS s The WT500 can accurately display the waveforms of signals with frequencies up to approximately 5 kHz 2 7 Waveform Di...

Page 52: ...r the trigger condition Trigger Slope Slope refers to the movement of the signal from a low level to a high level rising edge or from a high level to a low level falling edge When the slope is used as one of the trigger conditions it is called a trigger slope Trigger Level The trigger level is the level at which the trigger slope is determined When the trigger source passes through the specified t...

Page 53: ...nput zero line When the zoom factor is doubled Range displayed on the screen Vertical Waveform Position See section 7 6 for operating instructions You can vertically shift the displayed position of a waveform This is useful when you want to view the relationship between voltage and current waveforms or when the section of the waveform that you want to view does not fit into the display frame 100 1...

Page 54: ...o their element numbers with an element s voltage waveform coming before its current waveform User Waveforms can be assigned to windows by the user regardless of whether their displays are on or off Waveform Display Interpolation See section 7 8 for operating instructions The waveform display data can be connected linearly to display the waveform smoothly Linear Interpolation Fills in the space be...

Page 55: ...m and cursor can be measured and displayed The voltage or current at specific sections of the waveform and the data on the horizontal axis X axis can be measured Cursor measurements are performed on the data that is displayed on the screen Two cursors marked by a plus sign and an x appear on the screen For each cursor the vertical value can be measured and the X axis value relative to the left end...

Page 56: ...y segment raster and made into trend display data In some cases P P compression is not performed Scale Settings See section 8 5 for operating instructions The WT500 can automatically set the values at the top and bottom of the screen based on the maximum and minimum values of the trend display data this is referred to as auto scaling The values at the top and bottom of the screen can also be set m...

Page 57: ...s of the fundamental signals U 1 and I 1 in each element in the unit The positive vertical axis is set to zero angle zero and the vector of each input signal is displayed You can also zoom in on vectors or display amplitude values and the phase difference values between signals simultaneously The vector display is shown on the next page The elements whose vectors are displayed vary depending on th...

Page 58: ...1 U3 1 I2 1 U2 1 Vector Display When the Wiring System Is 3P3W Three phase three wire U1 1 U2 1 and U3 1 are line voltages I1 1 I2 1 and I3 1 are line currents However U3 1 and I3 1 are not actually measured for the 3P3W system The vectors are displayed through computation O F2 1 F1 1 FU1 I1 F3 1 FU1 U3 FU1 I2 U1 1 I1 1 I3 1 U3 1 I2 1 U2 1 FU1 U2 FU1 I3 Vector Display When the Wiring System Is 3P4...

Page 59: ...ments in a word processing application PC USB memory ESC RESET SET CAL PAGE PAGE ELEMENT 1 2 3 ELEMENT ALL RANGE VOLTAGE CURRENT AUTO AUTO DISPLAY NUMERIC WAVE OTHERS FORM ITEM CURSOR INTEGRATOR SETUP INPUT INFO START STOP RESET HOLD SINGLE SHIFT MISC NULL LOCAL KEY LOCK FILE IMAGE MENU STORE STORE SET POWER WT500 How WT500 Numeric Data and Waveform Display Data Can Be Transferred to a Personal Co...

Page 60: ...using an external controller to control the WT500 PC Communication interface ESC RESET SET CAL PAGE PAGE ELEMENT 1 2 3 ELEMENT ALL RANGE VOLTAGE CURRENT AUTO AUTO DISPLAY NUMERIC WAVE OTHERS FORM ITEM CURSOR INTEGRATOR SETUP INPUT INFO START STOP RESET HOLD SINGLE SHIFT MISC NULL LOCAL KEY LOCK FILE IMAGE MENU STORE STORE SET POWER WT500 Entering Values and Strings on a USB Keyboard See section 3 ...

Page 61: ...ch cases you can manually perform zero level compensation There is also a function that automatically performs zero level compensation during integration NULL Feature See section 12 4 for operating instructions When the NULL feature is turned on the Udc and Idc values numeric data of the simple average of the voltage and current are set as NULL values The NULL values are subtracted from the sample...

Page 62: ...aler Unplug If Abnormal Behavior Occurs If you notice smoke or unusual odors coming from the instrument immediately turn off the power and unplug the power cord Also turn off the power to any circuits under measurement that are connected to the input terminals Then contact your nearest YOKOGAWA dealer Do Not Damage the Power Cord Nothing should be placed on top of the power cord and it should be k...

Page 63: ...et Carry the Instrument Properly First turn off the circuit under measurement and remove the measurement cables Then turn off the instrument and remove the power cord and any attached cables When moving the instrument hold the handles on each side as shown below POWER FILE IMAGE MENU STORE STORE SET DISPLAY NUMERIC WAVE OTHERS FORM ITEM CURSOR INTEGRATOR SETUP INPUT INFO START STOP RESET HOLD SING...

Page 64: ...an unstable surface Note For the most accurate measurements use the instrument in the following kind of environment Ambient temperature 23 5 C Ambient humidity 30 to 75 RH no condensation When using the instrument in a place where the ambient temperature is 5 to 18 C or 28 to 40 C add the temperature coefficient to the accuracy as specified in chapter 14 When installing the instrument in a place w...

Page 65: ... outline of the attachment procedures is given below For detailed procedures see the instructions that are included with the rack mount kit 1 Remove the handles from the left side of the instrument 2 Remove the four feet from the bottom of the instrument 3 Remove the two plastic rivets and the four seals covering the rack mount attachment holes on each side of the instrument near the front 4 Place...

Page 66: ...tective grounding cannot be furnished do not use the instrument Connecting the Power Cord 1 Check that the power switch is off 2 Connect the instrument s power cord to the power inlet on the rear panel 3 Connect the plug on the other end of the power cord to an outlet that meets the conditions below The AC outlet must be a three prong outlet with a protective earth ground terminal Item Specificati...

Page 67: ...e power switch is turned on a self test starts automatically When the self test completes successfully the display shows the screen that was displayed immediately before the power switch was turned off Note If the instrument does not operate as described above when the power switch is turned on turn the power switch off and check that The power cord is securely connected The power outlet is receiv...

Page 68: ... shutting down The same operation is performed when the power cord is removed The next time the power switch is turned on the instrument powers up using the stored setup parameters Note A lithium battery is used to retain the setup parameters When the lithium battery voltage falls below a certain level and you turn the power switch on the instrument displays a message on the screen see section 13 ...

Page 69: ...ernal current sensor to a current sensor input connector remove the cables connected to the current input terminals In addition when the voltage of the circuit under measurement is being applied to a current sensor input terminal do not touch the current input terminals Doing so is dangerous because the terminals are electrically connected inside the instrument When using an external voltage trans...

Page 70: ...ables with dielectric strengths and current capacities that are appropriate for the voltage or current being measured Example When making measurements on a current of 20 A use copper wires that have a conductive cross sectional area of 4 mm2 or greater Connecting cables may cause radio interference in which case users will be required to correct the interference Note After you finish wiring you mu...

Page 71: ...ve approximately 10 mm of the covering from the end of the cable and pass it through the internal insulator Cable Internal insulator Attachable cable Covering Max diameter 3 9 mm Core wire Max diameter 1 8 mm 2 Insert the tip of the cable into the plug Fasten the cable in place using the hexagonal wrench Insert the hexagonal wrench into the plug and tighten Plug Hexagonal wrench 3 Insert the plug ...

Page 72: ...MAX EXT CURRENT ALL TERMINAL 1000V MAX TO CAT 10V MAX 1000VMAX 40A MAX Use the separately sold clamp on probes as follows Wiring to the Current Input Terminal 751550 voltage output type The current input terminal and EXT input terminal cannot be wired used simultaneously 751552 current output type 758917 758921 758924 Current under measurement WT500 current input terminal Connecting a clamp on pro...

Page 73: ...to the earth potential of the power source SOURCE SOURCE LOAD U I I U LOAD U U I I SOURCE Easily affected Not easily affected p p p Effects of the Measured Voltage and Current Amplitudes SOURCE LOAD U I I U LOAD SOURCE U I I U When the measured current is relatively large Connect the voltage input terminal to the load end When the measured current is relatively small Connect the current input term...

Page 74: ...e Clamp type current sensor current output type CT current transformer Notes when Replacing Other Power Meters with the WT500 In three phase three wire systems 3P3W and three phase three wire systems that use a three voltage three current method 3P3W 3V3A the wiring system of the WT500 may be different from that of another product another digital power meter depending on whether the reference volt...

Page 75: ...s Doing so is dangerous because the terminals are electrically connected inside the instrument When connecting measurement cables from external current sensors to current sensor input connectors remove the cables connected to the current input terminals In addition when the voltage of the circuit under measurement is being applied to current sensor input terminals do not touch the current input te...

Page 76: ...ble for the current levels Single Phase Two Wire System Wiring Example Applicable for models 760201 760202 and 760203 If three input elements are available three single phase two wire systems can be set up See section 3 7 for information about which of the wiring systems shown below should be selected SOURCE LOAD U1 I1 I U LOAD U1 U I1 I SOURCE SOURCE LOAD Input terminal SOURCE LOAD Input terminal...

Page 77: ...oltage three current method can be set up elements 1 2 and 3 SOURCE LOAD I I R S T U U U I SOURCE Input terminal 1 LOAD Input terminal 2 R S T I1 I2 I3 U3 U1 U2 Input terminal 3 I U I U I U Three Phase Four Wire System Wiring Example Applicable for model 760203 If three input elements are available one three phase four wire system can be set up elements 1 2 and 3 SOURCE LOAD I I R S T U U U I N SO...

Page 78: ...ts are not exposed into the voltage input terminal If you are using the 758931 Safety Terminal Adapter that comes with the package see section 3 6 External Current Sensor Input Terminal Connect an external sensor cable with a BNC connector B9284LK sold separately to an external current sensor input connector Remove the measurement cable connected to the current input terminal Because the current s...

Page 79: ...elines below when connecting the external sensor cable Connect the shielded wire of the external sensor cable to the L side of the shunt output terminal OUT Minimize the area of the space between the wires connecting the shunt resistor to the external sensor cable This reduces the effects of the lines of magnetic force which are caused by the measurement current and the external noise that enter t...

Page 80: ...the input terminals in the figures below varies depending on the number of installed input elements For details see Number of Installed Input Elements and Wiring Systems in section 2 3 Measurement Conditions Wiring Example of a Single Phase Two Wire System 1P2W with a Shunt Resistor SOURCE LOAD Earth side Shunt resistor I OUT L OUT H External current sensor input connector EXT Input terminal U Wir...

Page 81: ...l 1 U External current sensor input connector EXT Input terminal 2 U External current sensor input connector EXT Input terminal 3 U Wiring Example of a Three Phase Four Wire System 3P3W with a Shunt Resistor SOURCE LOAD I OUT L OUT H I OUT L OUT H R S T N I OUT L OUT H External current sensor input connector EXT Input terminal 1 U External current sensor input connector EXT Input terminal 2 U Exte...

Page 82: ... the circuit under measurement is being applied to the current input terminals do not touch the current sensor input terminals Doing so is dangerous because the terminals are electrically connected inside the instrument When connecting a measurement cable from an external current sensor to a current sensor input connector remove the cables connected to the current input terminals In addition when ...

Page 83: ...nded in the wiring diagrams in this section However the necessity of grounding and the grounding location ground near the VT or CT or ground near the power meter vary depending on the object being measured To measure the apparent power and power factor more accurately on an unbalanced three phase circuit we recommend that you use a three voltage three current method with a three phase three wire s...

Page 84: ... L CT VT V v l L CT VT V v l SOURCE L CT VT V v l LOAD R S T Input terminal 1 I U Input terminal 2 I U Input terminal 3 I U Wiring Example of a Three Phase Four Wire System 3P4W with a VT and CT L CT VT V v l L CT VT V v l SOURCE L CT VT V v l LOAD R S T N Input terminal 1 I U Input terminal 2 I U Input terminal 3 I U Note For details about the relationship between the wiring system and how measur...

Page 85: ...e of the Date year month and day or Time hour minute and second boxes 7 Press SET to display an entry box 8 Use the cursor keys to set the year month date hour minute or second that you selected in step 6 9 Press SET or ESC to close the entry box 10 Repeat steps 6 to 8 to set the year month date hour minute and second 11 Use the cursor keys to select Set 12 Press SET If you selected ON in step 5 t...

Page 86: ...he Date The format for setting the date is YY MM DD year month day Setting the Date Time The format for setting the time is HH MM SS hour minute second The hour can be set to a value from 0 to 23 Note The date and time information is backed up with an internal lithium battery when the power is turned off The WT500 contains leap year information The instrument determines the leap year calendar when...

Page 87: ... their factory default values This is useful when you wish to clear previous settings or start the settings from scratch For information about the initial settings see appendix 2 List of Initial Settings and Numeric Data Display Order Settings That Cannot Be Initialized Date and time settings Menu and message language settings The designation of the files display Filter File utility operation Func...

Page 88: ...elect a setup parameter with SET an entry box appears Then you can change the value by using the cursor keys Use the left and right cursor keys to select digits and use the up and down cursor keys to set the value of a digit Note Some of the parameters that can be changed using the cursor keys are reset to their initial values when SHIFT ESC RESET is pressed ...

Page 89: ...cter string Keys Other Than the Character Keys CAPS Switches between uppercase and lowercase SPACE Enters a space Enters the displayed characters Usable Characters and Maximum String Lengths Setting Max Length Usable Characters Equation 1 to 50 characters Spaces and all characters that are displayed on the keyboard Unit 1 to 8 characters Spaces and all characters that are displayed on the keyboard...

Page 90: ...ntact your nearest YOKOGAWA dealer Do not connect USB devices other than USB keyboards or USB memory to the USB PERIPHERAL ports The WT500 has two USB PERIPHERAL ports However USB devices whose maximum current consumption exceeds 100 mA cannot be connected simultaneously to the two ports Connection Procedure Connect the USB keyboard to the WT500 directly using a USB cable as shown below You can co...

Page 91: ...elow 1 Press MISC 2 Use the cursor keys to select USB 3 Press SET to display the USB dialog box 4 Use the cursor keys to select Device List 5 Press SET to select USB Device List Information about the connected USB keyboard appears Entering File Names Comments Etc When a keyboard is displayed on the screen you can enter file names comments and other items using the USB keyboard The characters that ...

Page 92: ...lues Switching to the Waveform Display 1 Press WAVE to display waveforms Switching to the Trend Bar Graph or Vector Display 1 Press OTHERS to display the Others menu Using the Cursor Keys 2 Use the cursor keys to set the display to Trend Bar or Vector 3 Press SET The selected display appears Using OTHER 2 Press OTHER to switch between display modes in this order Trend Bar Vector Trend and so on ...

Page 93: ...ter 6 For an explanation of the features see section 2 4 For operating instructions see chapter 6 For an explanation of the features see section 2 8 For operating instructions see chapter 6 For an explanation of the features see section 2 8 For operating instructions see chapter 7 For an explanation of the features see section 2 7 For operating instructions see chapter 8 For an explanation of the ...

Page 94: ...he synchronization source and the input filter appears Closing the Setup Parameter List 2 Press SHIFT SETUP INPUT INFO or ESC when no menus are displayed The list of setup parameters closes Explanation Setup Parameter List The figure below is an example of a setup parameter list when the crest factor is set to 3 Note The list of input conditions shows the settings when measurement took place If th...

Page 95: ...se the cursor keys to select Menu Language 5 Press SET to select JPN or ENG Explanation Selecting the Message Language Error messages appear when errors occur You can choose to display these messages using one of the following languages The error codes that accompany error messages are the same for both English and Japanese messages For more information about error messages see section 13 2 JPN Ja...

Page 96: ...lect JPN or ENG Explanation Set the language to use when entering file names comments and other items see section 3 15 for details from the USB keyboard The following keyboards conforming to USB Human Interface Devices HID Class Ver1 1 can be used ENG 104 keyboard JPN 109 keyboard The characters that are entered by each key on the USB keyboard vary depending on the keyboard type For details see ap...

Page 97: ...laystheSETUPmenu seebelowforthecontentsofthemenu DisplaystheMISCmenu seebelowforthecontentsofthemenu Select and confirm menu items Setup Menus Used in This Chapter To set a parameter access its menu by pressing the appropriate panel key The setup menus and menu items used in this chapter are shown below along with the sections that correspond to their operating instructions SETUP MISC SETUP key MI...

Page 98: ... menu 2 Use the cursor keys to select Wiring 3 Press SET to display the Wiring Settings dialog box Selecting a Wiring System 4 Use the cursor keys to select Wiring 5 Press SET The pattern selection dialog box appears 6 Use the cursor keys to select a pattern 7 Press SET to confirm the pattern ...

Page 99: ...2 1 1P2W 2 1P2W 1P3W Σ or 3P3W Σ Number of installed input elements Wiring system Pattern 1 Wiring system Pattern 2 Wiring system Pattern 3 Wiring system Pattern 4 1 1P2W 2 1P2W 3 1P2W 1P2W 1P2W 1P3W Σ or 3P3W Σ 1P3W Σ or 3P3W Σ 3P4W Σ or 3P3W 3V3A Σ Note Select the wiring system to match the actual wiring of the circuit under measurement The method in which the Σ functions are determined varies d...

Page 100: ...al current sensor input range has precedence over the direct input current range The auto range settings are changed to match the setting of the input element whose measurement range is highest If multiple input elements are set to a common highest measurement range the settings of the input element with the smallest input element number take precedence The synchronization source setting is change...

Page 101: ... Element Configuration Procedure 1 Press SETUP to display the Setup menu 2 Use the cursor keys to select Wiring 3 Press SET to display the Wiring Settings dialog box Selecting Whether or Not to Configure Input Elements Independently 4 Use the cursor keys to select Element Independent 5 Press SET to select ON or OFF ...

Page 102: ...n source setting Settings That Can Be Configured Independently Even When Independent Input Element Configuration Is Turned Off Scaling values VT ratio CT ratio and power factor Input filters line filter and frequency filter These settings can be configured independently for each input element regardless of whether independent input element configuration is turned on or off When independent input e...

Page 103: ...ress the voltage range down key to decrease the voltage range Press SHIFT AUTO to set the range automatically The AUTO LED lights Setting the Current Range 3 Press the CURRENT keys and to set the current range The range specified for each element is displayed at the upper right of the screen Press the current range up key to increase the current range Press the current range down key to decrease t...

Page 104: ...et to 3 You can select 500 mA 1 A 2 A 5 A 10 A 20 A or 40 A When the crest factor is set to 6 You can select 250 mA 500 mA 1 A 2 5 A 5 A 10 A or 20 A Note The range is set in reference to the rms value of the input signal For example if you are applying a 100 Vrms sinusoidal signal set the range to 100 V When measuring a signal other than a sine wave such as a distorted wave accurate measurements ...

Page 105: ...above When a wiring unit is configured the measurement range is increased on all input elements in the wiring unit when any of the elements in the unit meets the range increase conditions described above Range Decrease The measurement range is decreased when the data of the measurement function Urms or Irms is less than or equal to 30 of the measurement range and Upk and Ipk are less than or equal...

Page 106: ...range 3P3W 3V3A three voltage three current method 3P4W three phase four wire system Voltage range current range 3 when the voltage and current ranges on the elements in the wiring unit are set to the same range When the result of the equation voltage range current range exceeds 1000 W VA or var the displayed unit changes to kW kVA or kvar The display resolution is 60000 Note In auto range mode be...

Page 107: ...0 000 W 150 00 W 300 00 W 600 00 W 1200 00 W 30 000 W 60 000 W 120 000 W 300 00 W 600 00 W 1200 00 W 2 4000 kW 60 000 W 120 000 W 240 00 W 600 00 W 1200 00 W 2 4000 kW 4 8000 kW 100 000 W 200 00 W 400 00 W 1000 00 W 2 0000 kW 4 0000 kW 8 0000 kW 150 00 W 300 00 W 600 00 W 1 5000 kW 3 0000 kW 6 0000 kW 12 0000 kW 300 00 W 600 00 W 1200 00 W 3 0000 kW 6 0000 kW 12 0000 kW 24 000 kW Active Power Rang...

Page 108: ...0 00 W 2 0000 kW 37 500 W 75 000 W 150 00 W 375 00 W 750 00 W 1 5000 kW 3 0000 kW 75 000 W 150 00 W 300 00 W 750 00 W 1 5000 kW 3 0000 kW 6 0000 kW Active Power Range of a Wiring Unit with a 1P3W or 3P3W system or a 3P3W system with a 3V3A Method Voltage Range V 150 00 W 300 00 W 600 00 W 1 5000 kW 3 0000 kW 6 0000 kW 12 0000 kW 250 00 W 500 00 W 1000 00 W 2 5000 kW 5 0000 kW 10 0000 kW 20 000 kW ...

Page 109: ...external current sensor connectors 5 Press SET The Ext Sensor box lights If the Ext Sensor box is already lit proceed to step 7 Setting the External Current Sensor Range 6 Use the cursor keys to select Current 7 Press SET The external current sensor range entry box appears 8 Use the cursor keys to select the external current sensor range 9 Press SET to confirm the external current sensor range Not...

Page 110: ...ly set the conversion ration for elements whose Ext Sensor boxes are lighted Setting the External Current Sensor Conversion Ratio 12 Press SET to display the external current sensor conversion ratio entry box 13 Use the cursor keys to set the conversion ratio 4 5 Setting the Measurement Ranges for an External Current Sensor Optional ...

Page 111: ... on the amplitude of the input signal For auto range switching conditions and precautions see section 4 4 Setting the Measurement Range during Direct Input The different ranges used in the auto range are the same as those listed above for the fixed range Setting the External Current Sensor Conversion Ratio The conversion ratio can be set to a value from 0 0001 to 99999 9999 External Current Sensor...

Page 112: ...s to select Scaling 5 Press SET to select ON or OFF If you select ON the Scaling indicator lights at the top of the screen see section 1 3 for details Setting the VT Ratio 6 Use the cursor keys to select the VT of the element that you want to set the VT ratio of 7 Press SET to display the VT ratio entry box 8 Use the cursor keys to set the VT ratio 9 Press SET or ESC to close the VT ratio entry bo...

Page 113: ...se the CT ratio entry box 10 Repeat steps 6 to 9 to enter the CT ratios for all of the elements Setting the Power Factor SF 6 Use the cursor keys to select the power factor of the element that you want to set the SF Scaling Factor of 7 Press SET to display the power factor entry box 8 Use the cursor keys to set the power factor 9 Press SET or ESC to close the power factor entry box 10 Repeat steps...

Page 114: ...re not multiplied by the VT ratio CT ratio or power factor The output values of the VT and CT are displayed directly as numeric data Setting the VT Ratio The ratio can be set to a value from 0 0001 to 99999 9999 Setting the CT Ratio The ratio can be set to a value from 0 0001 to 99999 9999 Setting the Power Factor SF Scaling Factor The factor can be set to a value from 0 0001 to 99999 9999 Note If...

Page 115: ...Setup menu 2 Use the cursor keys to select Sync Source 3 Press SET to display the Sync Source Settings menu Setting the Synchronization Source 4 Use the cursor keys to select the sync source of the element that you want to set 5 Press SET to display the sync source entry box 6 Use the cursor keys to select a sync source 7 Press SET to confirm the sync source ...

Page 116: ... synchronization source by selecting None all of the sampled data within the data update interval is used to determine the numeric data When measuring DC signals this method can be used to prevent errors in the detection of the measurement period caused by noise When Setting the Synchronization Source to Ext Clk Apply a clock signal that meets the following specifications to the external clock inp...

Page 117: ...as the measurement period For details see appendix 5 Data update interval Measurement period Sync source Rising zero crossing Falling zero crossing Data update interval Measurement period Note The measurement period for determining the numeric data of the peak voltage or peak current is the entire span of the data update interval regardless of the above settings Therefore the measurement period fo...

Page 118: ...lay the line filter entry box 6 Use the cursor keys to select a line filter 7 Press SET to confirm the line filter If any of the measured elements are set to a setting other than OFF the LineFilt indicator lights see section 1 3 for details Selecting a Frequency Filter 4 In the Freq Filter menu use the cursor keys to select the frequency filter of the element that you want to set Only installed el...

Page 119: ...matically Selecting the Frequency Filter Because the frequency filter is inserted into the frequency measurement input circuit it affects frequency measurements It also affects the detection of the measurement period for voltage current and power measurements see appendix 5 for details In this case the filter also acts as a filter for detecting the zero crossing of the synchronization source signa...

Page 120: ...Use the cursor keys to select Update Rate 3 Press SET to display the Update Rate Settings menu 4 Press SET to display the data update rate entry box 5 Use the cursor keys to select a data update rate 6 Press SET to confirm the data update rate The set data update rate appears at the lower left of the screen ...

Page 121: ... relatively fast load fluctuations in the power system select a fast data update rate To capture relatively low frequency signals select a low data update rate 100 ms 200 ms 500 ms 1 s 2 s 5 s Note The display update rates of numeric data and waveform data may be lower than the data update rate The low frequency limit of the AC signal that can be measured varies depending on the data update rate T...

Page 122: ... select ON or OFF Selecting an Averaging Method 6 Use the cursor keys to select Type 7 Press SET to select Exp or Lin Setting the Attenuation Constant or the Average Count 8 Use the cursor keys to select Count 9 Press SET to display the attenuation constant or average count entry box If the averaging type is Exp exponential averaging set the attenuation constant If the averaging type is Lin moving...

Page 123: ...or each choice see section 2 3 Exp Exponential averaging is performed Lin Linear averaging is performed Setting the Attenuation Constant or Average Count If the averaging type is Exp exponential averaging set the attenuation constant If the averaging type is Lin moving averaging set the average count Exp The attenuation constant can be selected from 2 4 8 16 32 and 64 Lin The average count can be ...

Page 124: ... how each measurement function is determined see appendix 1 U k I k P k S k and Q k λ k and f k are computed using P k and Q k which are both averaged Uhdf Ihdf Phdf Uthd Ithd and Pthd are computed using U k I k and P k which are all averaged k The harmonic order Note When averaging is turned on the average value of multiple measurements is determined and displayed If the input signal changes dras...

Page 125: ...CF6 Explanation For details see section 2 3 Selecting a Crest Factor The crest factor is the ratio of the amplitude to the rms value You can set the crest factor to CF3 or CF6 Note When you select a crest factor the voltage range and current range are set to the maximum range on all elements If the crest factor is set to 6 the measurement conditions of crest factor 5 and higher required by IEC6201...

Page 126: ...y stops lighting and the numeric data display is updated Explanation Hold The hold operation stops data measurement and display operations and holds the display of all measurement function data Communication output data is the same as the held numeric data Single Measurement While the display is held this operation measures the signal once at the set data update rate and then re holds the display ...

Page 127: ...5 10 TurningIntegrationAutoCalibrationOnorOff 5 11 SelectingaWattHourIntegrationMethod forEachPolarity 5 12 SelectingaCurrent IntegrationMode Setup Menus Used in This Chapter To set a parameter access its menu by pressing the appropriate panel key The setup menus and menu items used in this chapter are shown below along with the sections that correspond to their operating instructions ITEM key 5 2...

Page 128: ... List or Dual List Only appears on models with the harmonic measurement option 4 Press SET to confirm the selected option You can also change the number of displayed items by pressing NUMERIC Each time you press NUMERIC the number of displayed items switches in this order 4 Items 8 Items 16 Items Matrix All Items Single List Dual List 4 Items and so on Only appears on models with the harmonic meas...

Page 129: ...nu 8 Use the cursor keys to select a group of measurement functions you want to display from U I P S Q λ f WP q Time and FU FI η 9 Each time you press SET the display switches between the measurement functions in the selected group For example if U I P is selected the measurement function that is displayed switches in this order each time you press SET U I P Changing an Element or Wiring Unit 10 U...

Page 130: ...nt or Wiring Unit 14 Use the cursor keys to select Element Σ 15 Press SET to display the element or wiring unit selection box 16 Use the cursor keys to select an element or wiring unit 17 Press SET The element number or wiring unit symbol for the selected element or wiring unit appears in the highlighted area This ends the description of how to change displayed items using menus For instructions o...

Page 131: ...he first and second lines correspond to voltage and current respectively The conditions of the input signals of elements 1 to 3 are displayed in numeric order from the left Page bar The current page is highlighted If page scrolling is possible using PAGE or PAGE the top and bottom sections of the page bar show If page scrolling is not possible is shown Data update count The data update count is di...

Page 132: ...ours returned to the power supply q ampere hours sum of positive and negative ampere hours q positive ampere hours consumed q negative ampere hours returned to the power supply WS volt ampere hours WQ var hours Time integration time η1 to η2 efficiency F1 to F8 user defined functions ΔF1 toΔF4 delta computation option Example The True Rms Voltage of Element 1 Element 1 True rms value Voltage Simpl...

Page 133: ...ayed for P If the measured or computed result cannot be displayed using the specified decimal place or unit OF for overflow is displayed If Urms Uac Irms or Iac is less than or equal to 0 5 when the crest factor is set to 3 less than or equal to 1 0 if the crest factor is set to 6 or Umn Urmn Imn or Irmn is less than or equal to 2 of the measurement range when the crest factor is set to 3 less tha...

Page 134: ...t from the choices below The selectable items vary depending on the number of elements installed in the WT500 Element1 Element2 Element3 and Σ If there are no elements that are assigned to the selected wiring unit because there is no numeric data Σ measurement functions will display no data Changing the measurement function of the third item Changing the element of the third item Resetting the Dis...

Page 135: ...ion η1 or η2 5 Press SET to display the efficiency equation computation parameter selection box 6 Use the cursor keys to select an efficiency computation parameter To assign the sum of multiple parameters to the numerator or denominator of an equation select Udef1 or Udef2 7 Press SET to confirm Setting the Efficiency Computation Parameters 4 Press the cursor keys to set the operand of the equatio...

Page 136: ... Input Power of element 1 P1 Output Power of element 2 P2 Efficiency equation P2 P1 Converter Inverter etc Input power P1 Output power P2 Efficiency of a Single Phase Two Wire Input Three Phase Three Wire Output Device Input Power of element 1 P1 Output Σ power of elements 2 and 3 PΣ Efficiency equation PΣ P1 Efficiency of a Three Phase Three Wire Input Single Phase Two Wire Output Device Input Σ ...

Page 137: ...SET to display the Measure Settings dialog box Selecting an Apparent Power Equation 6 Use the cursor keys to select S Formula 7 Press SET to display the apparent power equation selection dialog box 8 Use the cursor keys to select an apparent power equation 9 Press SET to confirm the equation Selecting an Apparent Power and Reactive Power Equation 6 Use the cursor keys to select S Q Formula 7 Press...

Page 138: ...ing an Apparent Power and Reactive Power Equation You can choose the equation for apparent and reactive power from one of the following three types For details see section 2 5 Type 1 The method used in the normal mode of conventional WT series power meters Active power for a three phase four wire system PΣ P1 P2 P3 Apparent power for a three phase four wire system SΣ S1 S2 S3 U1 I1 U2 I2 U3 I3 Rea...

Page 139: ... appears proceed to step 4 2 Use the cursor keys to select Details 3 Press SET to display the full Setup menu 4 Use the cursor keys to select Measure 5 Press SET to display the Measure Settings dialog box 6 Use the cursor keys to select Phase 7 Press SET to display the phase difference display format selection box 8 Use the cursor keys to set the phase difference display format to 180 Lead Lag or ...

Page 140: ...an angle between 0 and 360 in the clockwise direction Note If the measured voltage or current value is zero Error is displayed When both the voltage and current signals are sinusoidal waves and the ratios of the voltage and current inputs with respect to the measurement range do not differ greatly the phase difference f lead and lag are still detected and displayed correctly If the computation res...

Page 141: ...n resets when a specified amount of time elapses Start Key operation Key operation Key operation Date and time Date and time Stop Key operation Stopped by the timer Key operation Date and time Date and time Repetition Repeats when the timer expires Repeats when the timer expires Reference Section 5 7 Section 5 8 Section 5 8 Section 5 9 Section 5 9 For details on each integration mode see section 2...

Page 142: ...atus indicators may also appear TimeUp When integration continues up to the time specified by the integration timer it automatically stops This integration status is referred to as the TimeUp status Error The WT500 stores and holds the integration result even when a power failure occurs while integration is in progress When the power returns integration is stopped and the integration result calcul...

Page 143: ...e a single measurement by pressing SHIFT HOLD SINGLE the integration result at the point when integration was stopped is displayed or transmitted Integration time The dotted line is the integrated value SINGLE Single measurement OFF ON HOLD ON ON ON Displayed value START STOP RESET Sample Rate and Valid Frequency Ranges for Integration The sample rate is approximately 100 kHz The voltage current s...

Page 144: ...play update rate irrespective of the MAX hold feature section 5 12 for details Integration When the Measured Value Exceeds the Measurement Limit If a sampled instantaneous current or voltage exceeds the maximum or minimum measurement range limits of the AD circuit the value is measured as the maximum or minimum measurement range limit value Integration When Current Input Is Small Integration is pe...

Page 145: ... be changed Starting integration in auto range mode switches the measurement range to fixed range mode No No No No No No Yes Yes No Yes No No Yes No Yes Yes No No Feature Integration Suspended Note In addition to the settings and operations listed above other settings and operations that affect integration such as the self test operation and date and time settings cannot be performed Doing so will...

Page 146: ...se the cursor keys to select Integration 3 Press SET to display the Integration Settings menu Selecting Normal Integration Mode 4 Use the cursor keys to select Integ Mode 5 Press SET to display the integration mode selection box 6 Use the cursor keys to select Normal 7 Press SET to confirm the selection ...

Page 147: ...ion starts Holding Integration 15 Press HOLD The HOLD key lights and the numeric data display is held The WT500 continues the integration operation internally Un Holding 16 Press HOLD when the display is held The HOLD key is no longer lighted and the numeric data display is updated While the display is held you can execute a single measurement by pressing SHIFT HOLD SINGLE to update the display St...

Page 148: ...e integration timer to 00000 00 00 and then start integration Setting the Integration Mode Integration Timer In normal integration mode when the integration timer is set to 00000 00 00 integration is performed in manual integration mode For information about integration such as how to start stop and reset it see the explanations in section 5 6 5 7 Manual Integration ...

Page 149: ... to display the Setup menu 2 Use the cursor keys to select Integration 3 Press SET to display the Integration Settings menu Selecting Normal or Continuous Mode 4 Use the cursor keys to select Integ Mode 5 Press SET to display the integration mode selection box 6 Use the cursor keys to select Normal or Continuous 7 Press SET to confirm the selection ...

Page 150: ... the display is held you can execute a single measurement by pressing SHIFT HOLD SINGLE to update the display Stopping Integration 17 Press START STOP The integration indicator changes to Stop displayed in red The integration time and integrated value are held If you press START STOP before the integration timer expires and then press START STOP again integration will restart and continue until th...

Page 151: ...ion 5 6 for details is reached When integration stops the integration time and integrated value are held Continuous Integration Mode Integration continues for a specified amount of time and then resets and starts again Integration repeats until you press START STOP If the integrated value reaches its maximum or minimum displayable value before the specified amount of time has elapsed integration i...

Page 152: ...select Integration 3 Press SET to display the Integration Settings menu Selecting Real Time Integration Mode R Normal or Real Time Continuous Integration Mode R Continuous 4 Use the cursor keys to select Integ Mode 5 Press SET to display the integration mode selection box 6 Use the cursor keys to select R Normal or R Continuous 7 Press SET to confirm the selection ...

Page 153: ...ect one of the Real time Control integration start time boxes year month day hour minute or second 14 Press SET to display an entry box 15 Use the cursor keys to set the year month date hour minute or second that you selected in step 13 16 Press SET or ESC to close the entry box 17 Repeat steps 13 to 16 to set the year month date hour minute and second 18 Use the cursor keys to select one of the R...

Page 154: ...es to Stop displayed in red The integration time and integrated value are held If you press START STOP before the scheduled integration end time is reached and then press START STOP again integration will restart and continue until the scheduled integration end time is reached In real time integration mode once the scheduled integration end time is reached the integration indicator switches from S...

Page 155: ... integrated value reaches its maximum or minimum displayable value integration is stopped and the integration time and integrated value at that point are held Setting the Integration Timer You can set the timer hour minute and second within the following range 00000 00 00 to 10000 00 00 Note If you set the integration timer to 00000 00 00 in real time integration mode the WT500 starts integration ...

Page 156: ... OFF Explanation Turning Integration Auto Calibration On or Off Ordinary zero level compensation takes place when the measurement range or line filter is changed but you can also automatically calibrate the zero level during integration ON Zero level compensation takes place approximately once every hour during integration OFF Zero level compensation does not take place during integration Note Whe...

Page 157: ...thod for Each Polarity 4 Use the cursor keys to select WP Type 5 Press SET to select either Charge Discharge or Sold Bought Explanation Selecting a Watt Hour Integration Method for Each Polarity You can set the integration method for WP and WP to one of the choices listed below Charge Discharge Measure DC watt hours by polarity integrate sampled values Sold Bought Measure AC watt hours by polarity...

Page 158: ... 5 Press SET to select rms mean dc r mean or ac Explanation Selecting a Current Integration Mode You can select the type of current whose values will be integrated from one of the choices listed below For the integration methods that correspond to these different current types see section 2 6 rms True rms value mean Rectified mean value calibrated to the rms value dc Linear average r mean Rectifie...

Page 159: ...rs proceed to step 4 2 Use the cursor keys to select Details 3 Press SET to display the full Setup menu 4 Use the cursor keys to select User Function 5 Press SET to display the User Defined Function Settings dialog box Selecting Whether or Not to Compute a User Defined Function 6 Use the cursor keys to select the user defined function that you want to set 7 Press SET to select ON or OFF If you sel...

Page 160: ...o create equations and use the numeric data of the combined functions to determine the value of the equation It is convenient to use a USB keyboard when entering multiple equations or particularly long equations Turning the Computation of a User Defined Function On or Off You can choose to turn the computation of the selected user defined function on or off ON The ON OFF indicator lights The funct...

Page 161: ...PK CfU CFU CfI CFI η1 ETA1 η2 ETA2 Wp WH Wp WHP Wp WHM q AH q AHP q AHM WS SH WQ QH Time TI F1 F1 F2 F2 F3 F3 F4 F4 F5 F5 F6 F6 F7 F7 F8 F8 The following measurement functions can be computed on models with the delta computation option ΔF1rms DELTAF1RMS ΔF1mn DELTAF1MN ΔF1dc DELTAF1DC ΔF2rms DELTAF2RMS ΔF2mn DELTAF2MN ΔF2dc DELTAF2DC ΔF3rms DELTAF3RMS ΔF3mn DELTAF3MN ΔF3dc DELTAF3DC ΔF4rms DELTAF4...

Page 162: ...onal is required Setting parameters for functions followed by Specify the element You do not need to specify a harmonic order For example E1 For information about the symbols that can be used in the parameters of each operand see appendix 7 Values Substituted in Operands The substituted value of TI is the same regardless of which element symbol E1 to E3 is used in TI The unit of TI values is secon...

Page 163: ...ser defined equation with a number that is greater than or equal to its own number correct results will not be obtained For example if you set user defined function F3 to F1 F3 or to F1 F4 the computed result will be displayed as no data or Error Operators The following operators can be used in equations Operator Example Description U E1 OR1 U E2 OR1 Basic arithmetic ABS ABS P E1 ORT P E2 ORT Abso...

Page 164: ...menu If the full Setup menu does not appear proceed to step 2 If the full Setup menu appears proceed to step 4 2 Use the cursor keys to select Details 3 Press SET to display the full Setup menu 4 Use the cursor keys to select User Function 5 Press SET to display the User Defined Function Settings dialog box 6 Use the cursor keys to select Max Hold 7 Press SET to select ON or OFF ...

Page 165: ... to E4 Σ can be entered between the parentheses of these functions URMSMAX UMEANMAX UDCMAX URMEANMAX UACMAX IRMSMAX IMEANMAX IDCMAX IRMEANMAX and IACMAX One symbol from E1 to E4 Σ can be entered between the parentheses of these functions PMAX SMAX and QMAX One symbol from E1 to E4 Σ can be entered between the parentheses of these functions URMSMAX and UMEANMAX One symbol from E1 to E3 can be enter...

Page 166: ...ing a user defined function as follows Average active power Integrated power Elapsed integration time For example to determine the average active power of element 1 set the equation of a user defined function as follows WH E1 TI E1 3600 The unit of TI values is seconds For instructions on how to set user defined functions see section 5 13 ...

Page 167: ... keys to select the input signal that you want to measure the frequency of 9 Press SET to confirm the selection Explanation You can measure two of the input element signal frequencies However on models with the frequency measurement add on option the frequencies of all elements can be measured so there is no need to set which input signals to measure On those models the Freq Items menu option will...

Page 168: ...full Setup menu does not appear proceed to step 2 If the full Setup menu appears proceed to step 4 2 Use the cursor keys to select Details 3 Press SET to display the full Setup menu 4 Use the cursor keys to select Delta Measure 5 Press SET to display the Delta Measure Settings dialog box 6 Use the cursor keys to select Meas Type The menu varies depending on the wiring system 7 Press SET to confirm...

Page 169: ... 2 and 3 are set to 3P4W or 3V3A Σ Selecting the Delta Computation Type You can select the delta computation type from the choices below The selectable items vary depending on the selected wiring system Wiring System Selectable delta computation types 1P3W Difference or 3P3W 3V3A 3P3W Difference or 3P3W 3V3A 3P4W Star Delta 3P3W 3V3A Delta Star Difference Computes the differential voltage and diff...

Page 170: ...mn Ut ΔF3dc Ut ΔF3rmn Ut ΔF3ac Ut ΔF4rms In ΔF4mn In ΔF4dc In ΔF4rmn In ΔF4ac In rms mn dc rmn and ac are delta computation modes I I R S T U U U I N I1 I2 I3 U3 U2 U1 Ur Ut Us In Selecting a Delta Computation Mode You can select the voltage or current mode to be displayed as delta computation values from the following rms mean dc r mean ac Note We recommend that you set the measurement range and ...

Page 171: ...ic Data Display Items DisplaystheOTHERSmenu seebelowforthecontentsofthemenu INTEGRATOR SETUP INPUT INFO START STOP RESET HOLD SINGLE SHIFT MISC NULL LOCAL KEY LOCK DisplaystheSETUPmenu seebelowforthecontentsofthemenu Setup Menus Used in This Chapter To set a parameter access its menu by pressing the appropriate panel key The setup menus and menu items used in this chapter are shown below along wit...

Page 172: ...ing the Item to Change 1 Use the cursor keys to select the item that you want to change The selected item is highlighted In the Single List and Dual List displays move the cursor to the center or left of the screen Current cursor location Display Examples Single List display Current cursor location Dual List display Changing a Measurement Function 2 Press SET to display the function select menu 3 ...

Page 173: ...elect Item No 3 Press SET to display the Item No selection box 4 Use the cursor keys to select the item that you want to change 5 Press SET or ESC to confirm the selection Changing a Measurement Function 6 Use the cursor keys to select Function 7 Press SET to display the measurement function selection box 8 Use the cursor keys to select a measurement function from the list which starts with None 9...

Page 174: ... appears along with its corresponding numeric data in the highlighted area Changing a Harmonic Order 14 Use the cursor keys to select Order 15 Press SET to display the harmonic order selection box 16 Use the cursor keys to select a harmonic order 17 Press SET or ESC to confirm the selection The selected harmonic order appears along with its corresponding numeric data in the highlighted area This e...

Page 175: ... order 5 Press SET or ESC to close the harmonic order selection box Present harmonic Harmonic measurement functions Resetting the Displayed Item Order In any display other than ALL Single List or Dual List 1 Press ITEM to display the Numeric menu 2 Use the cursor keys to select Reset Items Exec 3 Press SET An Alert dialog box appears 4 Use the cursor keys to select OK 5 Press SET The order of ever...

Page 176: ...nction The items described in section 2 2 Types of Harmonic Measurement Functions can be selected You can also choose not to display a measurement function None Changing an Element or Wiring Unit You can select the element wiring unit from the choices below The selectable items vary depending on the number of elements installed in the WT500 Element1 Element2 Element3 and Σ Changing a Harmonic Orde...

Page 177: ...ls is measured If the analysis window width number of cycles of the fundamental signal that is determined by the fundamental frequency is shorter than the data update interval harmonic data is not measured and no data is displayed If this happens decrease the data update rate For example if the fundamental frequency is 10 Hz 100 ms cycle the analysis window width is 1 wave see section 14 6 for det...

Page 178: ... Setup menu 2 Use the cursor keys to select Harmonics 3 Press SET to display the Harmonics Settings dialog box 4 Use the cursor keys to select PLL Source 5 Press SET to display the PLL source selection box 6 Use the cursor keys to select a PLL source 7 Press SET to confirm the selection ...

Page 179: ...rce that has as little distortion and fluctuation as possible If the fundamental frequency of the PLL source fluctuates or if the fundamental frequency cannot be measured due to waveform distortion correct measurements will not be obtained When the measured item is a switching power supply and in other cases where the distortion of the voltage signal is smaller than that of the current signal we r...

Page 180: ...cursor keys to select Harmonics 5 Press SET to display the Harmonics Settings dialog box Selecting the Minimum Harmonic Order to Measure 6 Use the cursor keys to select Min next to Measured Order 7 Press SET to select 0 or 1 Setting the Maximum Harmonic Order to Measure 8 Use the cursor keys to select Max next to Measured Order 9 Press SET to display the harmonic order entry box 10 Use the cursor ...

Page 181: ... the Maximum Harmonic Order to Measure You can select a harmonic order from 1 to 50 Note If the minimum harmonic order to measure is set to 1 the data of the DC component is not included when determining the distortion factor Overload OL and zero are not displayed for harmonic orders from dc 0th order to 50 For information about the display of zero and the overload indication in normal measurement...

Page 182: ... the cursor keys to select 1 Total or 1 Fundamental 9 Press SET to confirm the selection Explanation When determining the harmonic measurement functions Uhdf Ihdf Phdf Uthd Ithd and Pthd you can select to use one of the denominators described below as the denominator for the equation For more information about the distortion factor equations see appendix 1 1 Total The denominator is the measured d...

Page 183: ...isplay the Setup menu 2 Use the cursor keys to select Filters 3 Press SET to display the Filter Settings dialog box 4 Use the cursor keys to select the Line Filter of the element that you want to set 5 Press SET to display the cutoff frequency selection box 6 Use the cursor keys to select a cutoff frequency 7 Press SET to confirm the selection If any of the measured elements is set to a setting ot...

Page 184: ...ic measurement Selecting an Anti Aliasing Filter Line Filter You can select from one of the following cutoff frequencies OFF 500 Hz and 5 5 kHz If any of the measured elements is set to a setting other than OFF the LineFilt indicator at the top of the screen lights Selecting OFF disables the anti aliasing filter line filter The accuracy and the upper limit of the measurement bandwidth change when ...

Page 185: ...s to select the Function of the bar graph Graph1 to Graph3 that you want to set 6 Press SET to display the measurement function selection box 7 Use the cursor keys to select a measurement function 8 Press SET The symbol for the selected function is displayed on the screen along with its bar graph Changing the Graphed Element 9 Use the cursor keys to select the Element of the bar graph Graph1 to Gr...

Page 186: ...ear on the screen Setting the Bar Graph Display Range The difference between the starting harmonic order and the ending harmonic order must be greater than or equal to 10 Setting the Starting Order 18 Use the cursor keys to select Start Order 19 Press SET to display the starting harmonic order selection box 20 Use the cursor keys to set the bar graph starting order 21 Press SET or ESC to close the...

Page 187: ... position selection box for Position C1 or Position C2 x 9 Use the cursor keys to set the position in terms of the harmonic order Select Position C1 to move the position of cursor Select Position C2 x to move the position of cursor x 10 Press SET or ESC to close the cursor position selection box Linking Cursors 11 Use the cursor keys to select Linkage 12 Press SET The linkage indicator lights and ...

Page 188: ...of the choices below The selectable items vary depending on the number of elements installed in the WT500 Element1 Element2 and Element3 Selecting Which Bar Graphs to Display There are three bar graphs You can set which bar graphs are displayed from Graph1 to Graph3 by changing the number of split screens in the bar graph display Note If a value is negative on the log scale its absolute value is d...

Page 189: ...ot performed Measured Items Y1 Y axis value of cursor of bar graph 1 Y1x Y axis value of cursor x of bar graph 1 ΔY1 Difference between the Y axis values of cursor and cursor x of bar graph 1 Y2 Y axis value of cursor of bar graph 2 Y2x Y axis value of cursor x of bar graph 2 ΔY2 Difference between the Y axis values of cursor and cursor x of bar graph 2 Y3 Y axis value of cursor of bar graph 3 Y3x...

Page 190: ... to select Numeric 6 Press SET to select ON or OFF Setting a Vector Zoom 7 Use the cursor keys to select U Mag or I Mag Select U Mag to zoom the vectors of the fundamental voltage signals U 1 of the elements that subject to harmonic measurement Select I Mag to zoom the vectors of the fundamental current signals I 1 of the elements that are subject to harmonic measurement 8 Press SET to display the...

Page 191: ...ls are the same as with harmonic data See the Note part of section 6 2 Turning the Display of Numeric Data On or Off You can select whether or not to display numeric data by selecting ON or OFF The signal sizes and the phase differences between the signals can be displayed along with the vector display For information about phase difference display formats see section 5 5 Setting the Vector Zoom F...

Page 192: ...U1 1 U3 1 U2 1 φU1 U2 φU2 U3 φU3 U1 By moving the vectors U1 1 U2 1 and U3 1 so that the starting points of all vectors are at the origin O the phase relationship can be observed in the same fashion as the 3P4W system For information about the relationship between the positions of the vectors after they have been moved see Vector Display of Harmonic Data in section 7 1 The WT500 does not provide a...

Page 193: ...m menu items INTEGRATOR SETUP INPUT INFO START STOP RESET HOLD SINGLE SHIFT MISC NULL LOCAL KEY LOCK DisplaystheFORMmenu seebelowforthecontentsofthemenu Setup Menus Used in This Chapter To set a parameter access its menu by pressing the appropriate panel key The setup menus and menu items used in this chapter are shown below along with the sections that correspond to their operating instructions 7...

Page 194: ... the displayed waveform Trigger level Ground level Measurement Mode during Waveform Display When waveforms are displayed the measurement mode indicated in the upper left of the screen is Normal Mode Trg After a trigger occurs see section 7 4 for details measurement takes place at the data update interval Note If you do not set the trigger level properly the waveform display start point the signal ...

Page 195: ...to select All OFF 3 Press SET The indicators to the left of the input signals all turn off and none of the waveforms are displayed Turning Individual Input Signal Waveform Displays On or Off 2 Use the cursor keys to select an input signal 3 Press SET The indicator to the left of the selected input signal lights and the waveform of that signal is displayed If you press SET again the indicator turns...

Page 196: ...lay feature itself see section 2 7 The time axis is set in Time div time per grid division The time axis can be set up to the point in which the time corresponding to one screen is equal to the data update interval in 1 2 5 steps For example when the data update interval is 500 ms if you change the time per division in this order 1 ms 2 ms 5 ms 10 ms 20 ms 50 ms the time corresponding to one scree...

Page 197: ...gs menu Selecting a Trigger Mode 4 Use the cursor keys to select Mode 5 Press SET to select Auto or Normal Selecting a Trigger Source 4 Use the cursor keys to select Source 5 Press SET to display the trigger source selection box 6 Use the cursor keys to select a waveform from the list which starts with U1 7 Press SET to confirm the trigger source selection Selecting a Trigger Slope 4 Use the curso...

Page 198: ...imeout period elapses without a trigger occurring the display is updated automatically If the period of the trigger signal is greater than 100 ms the display is updated as the two conditions described above alternate If this occurs use Normal mode Normal The display is only updated when a trigger occurs If a trigger does not occur the display is not updated Selecting a Trigger Source You can set t...

Page 199: ...external start signal output connector EXT CLK when a GP IB cable is connected to the GP IB connector first remove the GP IB cable Then connect the BNC cable Finally reconnect the GP IB cable Input Circuit for the External Trigger Signal and Time Chart External trigger signal External trigger 100 Ω 5 V Minimum pulse width Trigger delay time When set to Internal trigger EXT CLK Selecting a Trigger ...

Page 200: ...tting is invalid Input zero line center of the vertical axis 100 300 Vpk 100 300 Vpk Measurement range 100 Vrms or 50 Vrms when the crest factor is set to 3 or 6 respectively Trigger level 25 25 trigger level 75 V T Note To prevent noise related errors the trigger feature has a hysteresis of approximately 2 when the crest factor is set to 3 For example when the trigger slope is set to a trigger wi...

Page 201: ...r selection box 4 Use the cursor keys to select a zoom factor 5 Press SET to confirm the selection Shifting a Waveform Position 2 Use the cursor keys to select the measurement function vertical position in the Vertical Position column that you want to set 3 Press SET to display the vertical position entry box 4 Use the cursor keys to set the position as a percentage A value of 100 is equivalent to...

Page 202: ...per and lower vertical display limits of the screen are 100 and 100 100 100 Position moved by 50 Position moved by 50 As shown in the figure below when the zoom factor is set to a value other than 1 the upper and lower display limits of the screen do not correspond to three or six times the measurement range or to 100 when the crest factor is set to 3 or 6 respectively You must take the zoom facto...

Page 203: ...ber of split screens by pressing WAVE When you press WAVE the number of split screens changes in this order Single Dual Triad Quad Selecting How Waveforms Are Assigned to Screens 6 Use the cursor keys to select Wave Mapping 7 Press SET to display the Wave Mapping dialog box 8 Press SET to select Auto Fixed or User If you select User proceed to step 10 9 Use the cursor keys to select an input signa...

Page 204: ...points Methods for Assigning Waveforms to Screens Auto The waveforms whose displays are turned on see section 7 2 for details are assigned in order according to their element numbers with an element s voltage waveform U coming before its current waveform I Fixed Regardless of whether their displays are on or off waveforms are assigned in order according to their element numbers with an element s v...

Page 205: ...splay the Display Settings dialog box Selecting Whether or Not to Use Interpolation 4 Use the cursor keys to select Interpolate 5 Press SET to select or Changing the Graticule 4 Use the cursor keys to select Graticule 5 Press SET to select or Selecting Whether or Not to Display the Scale Values 4 Use the cursor keys to select Scale Value 5 Press SET to select ON or OFF Selecting Whether or Not to ...

Page 206: ...interpolation range The interpolation feature interpolates between points that are in the interpolation range You can select one of the following options No interpolation is performed Outside of the interpolation range Within the interpolation range The space between two data points is filled with a straight line Outside of the interpolation range The spaces between vertically aligned dots are fil...

Page 207: ... 6 7 8 9 10 11 12 13 14 App Index Changing the Graticule You can choose one of the following graticule options Grid No grid or cross hair Cross hair 7 8 Selecting a Graticule and Turning Interpolation Scale Value Display and Wave Labels On or Off ...

Page 208: ...The scale values are displayed OFF The scale values are not displayed Turning the Display of Waveform Labels On or Off You can choose whether or not to display waveform labels input signal names ON Labels are displayed OFF Labels are not displayed Time at the right edge of the screen Time at the left edge of the screen Lower limits Upper limits Waveform labels 7 8 Selecting a Graticule and Turning...

Page 209: ...e Waveforms to Measure Using Cursors Selecting the Waveform to Measure Using Cursor 4 Use the cursor keys to select C1 under Trace 5 Press SET to display the waveform selection box 6 Use the cursor keys to select a waveform from the list which starts with U1 7 Press SET to confirm the waveform selection Selecting the Waveform to Measure Using Cursor x 4 Use the cursor keys to select C2x under Trac...

Page 210: ... to close the cursor position entry box Moving Cursor x 8 Use the cursor keys to select C2x under Position 9 Press SET to display the cursor position entry box 10 Use the cursor keys to set the cursor position 11 Press SET or ESC to close the cursor position entry box Linking the Cursor Positions 12 Use the cursor keys to select Linkage 13 Press SET to turn Linkage on The Linkage indicator lights ...

Page 211: ...he data on the horizontal axis X axis can be measured ON Cursor measurement is performed OFF Cursor measurement is not performed Selecting the Waveform to Measure You can select the waveform to measure using cursors from one of the choices below The selectable items vary depending on the number of elements installed in the WT500 U1 I1 U2 I2 U3 and I3 Measurable Items Y Vertical value of cursor Y a...

Page 212: ...le of the maximum and minimum values Moving the Cursors Cursors move along the selected waveform Cursors can be moved anywhere between the left and right edges of the display The unit of cursor movement is the amount of time contained in one screen 500 When the cursor positions are linked increasing or decreasing the setting for one cursor will increase or decrease the setting for the other cursor...

Page 213: ...ems INTEGRATOR SETUP INPUT INFO START STOP RESET HOLD SINGLE SHIFT MISC NULL LOCAL KEY LOCK DisplaystheFORMmenu seebelowforthecontentsofthemenu 8 10 Measuring with Cursors Setup Menus Used in This Chapter To set a parameter access its menu by pressing the appropriate panel key The setup menus and menu items used in this chapter are shown below along with the sections that correspond to their opera...

Page 214: ... in the screen Time at the left edge of the screen fixed at 0 seconds The number of data points between the left and right edges of the screen P P indicates that the displayed waveform has been P P compressed see sections 2 7 and 2 8 for details The displayed trend the measurement function and the upper limit The displayed trend the measurement function and the lower limit When the display is held...

Page 215: ...ess SET The indicators to the left of the trend symbols all turn off and none of the trends are displayed Turning Individual Trend Displays On or Off 2 Use the cursor keys to select a trend symbol 3 Press SET The indicator to the left of the selected trend symbol lights and the trend that corresponds to the symbol is displayed If you press SET again the indicator turns off and the trend is no long...

Page 216: ...mn 3 Press SET to display the measurement function selection box 4 Use the cursor keys to select a measurement function 5 Press SET to confirm the selection Selecting an Element or Wiring Unit 6 Use the cursor keys to select an element or wiring unit in the Element Σ column 7 Press SET to display the element and wiring unit selection box 8 Use the cursor keys to select an element or wiring unit 9 ...

Page 217: ...nic measurement option 10 Use the cursor keys to select Order 11 Press SET to display the harmonic order selection box 12 Use the cursor keys to select a harmonic order 13 Press SET or ESC to close the harmonic order selection box Select a harmonic measurement function 8 4 Setting Which Measurement Functions to Display Using Trends ...

Page 218: ...rmonic order to Total or to a harmonic from dc 0th to the 50th harmonic Note For the meanings of the displayed measurement function symbols see section 2 2 Measurement Functions and Measurement Periods section 2 5 Computation section 2 6 Integration and appendix 1 Symbols and Determination of Measurement Functions For information about wiring unit Σ see section 4 2 Selecting a Wiring System If the...

Page 219: ... 4 Use the cursor keys to select Auto or Manual 5 Press SET to confirm the selection If you select Manual proceed to step 6 Setting the Upper Limit for Manual Scaling 6 Use the cursor keys to select the upper limit that you want to set the top value in the row of the trend that you want to set in the Manual Upper Lower column 7 Press SET to display the scaling value entry box 8 Use the cursor keys...

Page 220: ...caling value entry box Explanation Setting Trend Scaling You can set the upper and lower limits of the trend display You can select the method for setting those limits from the choices below Auto The upper and lower limits of the display are automatically determined based on the maximum and minimum displayed trend data values Manual The upper and lower display limits can be set manually Using Manu...

Page 221: ...d by the data update rate and the time axis T div For example if the data update rate is 100 ms and you set T div to 3s div the trend display is updated every second If you set the data update rate to 5 s and T div to 3s div the trend display is updated every 5 seconds and the trend data is displayed as a line graph with each point separated by five seconds If you set T div to 1day the trend displ...

Page 222: ... one of the options listed below The options are the same as those available in the waveform display see section 7 7 for details Single The screen is not split Dual Two split screens Triad Three split screens Quad Four split screens Depending on the number of split screens the number of displayed points in each screen changes as described below Single 432 points Dual 216 points Triad 144 points Qu...

Page 223: ... the instructions in Selecting Whether or Not to Display Waveform Labels in section 7 8 Explanation Selecting Whether or Not to Use Interpolation See the explanation Selecting Whether or Not to Use Interpolation in section 7 8 Changing the Graticule See the explanation in Changing the Graticule in section 7 8 Turning the Display of the Scale Values On or Off See the explanation in Turning the Disp...

Page 224: ... Trend Exec 3 Press SET The trends restart Explanation When you restart trends the trends up to that point are cleared In addition to when you execute Clear Trend Exec trends will also restart when The measurement function of a trend is adjusted The trend display time axis horizontal axis is adjusted Integration is started or reset ...

Page 225: ...displayed Selecting the Trends to Measure Using Cursors Selecting the Trend to Measure Using Cursor 4 Use the cursor keys to select C1 under Trace 5 Press SET to display the trend selection box 6 Use the cursor keys to select one of the trends from T1 to T8 7 Press SET to confirm the trend selection Selecting the Trend to Measure Using Cursor x 4 Use the cursor keys to select C2x under Trace 5 Pre...

Page 226: ...to close the cursor position entry box Moving Cursor x 8 Use the cursor keys to select C2x under Position 9 Press SET to display the cursor position entry box 10 Use the cursor keys to set the cursor position 11 Press SET or ESC to close the cursor position entry box Linking the Cursor Positions 12 Use the cursor keys to select Linkage 13 Press SET to turn Linkage on The Linkage indicator lights 8...

Page 227: ...her cursor by the same amount Measurable Items Y Vertical value of cursor Y axis value Yx Vertical value of cursor x Y axis value ΔY The difference between the Y axis values of cursor and cursor x X X axis value of cursor from the left edge of the screen With the left edge of the screen being 0 seconds the time between the left edge of the screen and cursor is indicated Xx X axis value of cursor x...

Page 228: ...EY LOCK DisplaystheSTOREmenu seebelowforthecontentsofthemenu 9 6 Storing Numeric Data Setup Menus Used in This Chapter To set a parameter access its menu by pressing the appropriate panel key The setup menus and menu items used in this chapter are shown below along with the sections that correspond to their operating instructions 9 2 Setting the Storage Mode 9 4 Setting the Store Count Store Inter...

Page 229: ...ode You can choose from one of the following methods for starting and stopping storage Manual When you press STORE numeric data is stored for the number of times specified by the store count at the rate specified by the store interval Real Time After you press STORE numeric data storage starts at the scheduled storage start time and continues at the rate specified by the store interval for the num...

Page 230: ...ft of all elements and measurement functions light to show that they are subject to the storage operation Unselecting All Numeric Data Types 4 Use the cursor keys to select All OFF next to Preset 5 Press SET The indicators to the left of all elements and measurement functions turn off to show that they are not subject to the storage operation Selecting a Preset Group of Numeric Data Types 4 Use th...

Page 231: ...ement in section 2 2 can be stored Note For the meanings of the displayed measurement function symbols see section 2 2 Measurement Functions and Measurement Periods section 2 5 Computation section 2 6 Integration and appendix 1 Symbols and Determination of Measurement Functions You can only select wiring unit Σ when it has been selected according to the procedure described in section 4 2 Selecting...

Page 232: ...set the store count 7 Press SET or ESC to close the store count entry box Checking the Maximum Store Count and Optimizing the Store Count 8 Use the cursor keys to select Optimize Count 9 Press SET The Optimize Count dialog box appears and the maximum store count is displayed If the displayed maximum store count value is less than the value that you set in step 6 proceed to step 10 Otherwise procee...

Page 233: ...d Times Only when the storage mode is set to Real Time 8 Use the cursor keys to select one of the Real time Control storage start time boxes year month day hour minute or second 9 Press SET to display an entry box 10 Use the cursor keys to set the year month date hour minute or second that you selected in step 8 11 Press SET or ESC to close the entry box 12 Repeat steps 8 to 11 to set the year mon...

Page 234: ...ils so that it is an integer multiple of the store interval you can store the final integrated value each time that the integration timer expires and integration resets Setting the Scheduled Storage Start and End Times You can set the year month day hour minute and second of the storage start and end times Be sure to set the storage end time to a time after the storage start time The start and end...

Page 235: ...dium 4 Use the cursor keys to select File List 5 Press SET to display the File List dialog box 6 Use the cursor keys to select the storage medium displayed using brackets that you want to save to 7 Press SET to confirm the storage media selection Selecting a Directory Follow these procedures if the storage medium has directories 8 Use the cursor keys to select the directory displayed using that yo...

Page 236: ...to enter the file name For instructions on how to use the keyboard see section 3 14 Entering Values and Character Strings 14 Use the cursor keys to select Auto Naming 15 Press SET to select ON or OFF 16 Use the cursor keys to select Comment 17 Press SET A keyboard appears on the screen Enter text just as you did in File Name Selecting Automatic CSV File Conversion 18 Use the cursor keys to select ...

Page 237: ...n time is not included Approximately 4 Dn 16 store count When the integration time is included Approximately 4 Dn 16 16 Ti store count where Dn the number of stored numeric data types the number of stored numeric data types the no of measurement functions no of elements no of wiring units Ti the number of stored integration times the number of elements hds Approximately 8KB Selecting the Storage M...

Page 238: ...t before the number by specifying it in File Name the name can have up to eight characters Selecting Automatic CSV File Conversion You can automatically create ASCII CSV files from stored numeric data wts and header hds files Auto After numeric data is stored it is automatically converted into an ASCII csv file When the numeric data storage medium is the internal RAM disk RAM0 0 the CSV file is cr...

Page 239: ...save more than 1000 files either start saving to a different directory or move already saved files to a different directory If there are a large number of files on a single directory the amount of time that it takes to write to and read files becomes longer If this happens start saving files to a directory with less files or move the files in the save destination to a different directory Larger nu...

Page 240: ...ts when integration starts The store key lights and Store Start appears in the upper left of the screen Manually Stopping the Storage Operation 2 After starting storage you can press STORE again to stop storage The STORE key light turns off Automatically Stopping the Storage Operation 2 Depending on the storage mode storage will stop and the STORE key light will turn off under one of the following...

Page 241: ... conditions depending on the storage mode For details see the storage stop instructions earlier in this section Resetting the Storage Operation After you have stopped storage you must reset the storage operation in order to start storing again How Numeric Data Is Stored Numeric data is either stored to USB memory or to the internal RAM disk When you turn off the WT500 power the contents of the int...

Page 242: ...display the Store File Settings dialog box Converting to CSV Format 4 Use the cursor keys to select File List 5 Press SET to display the File List dialog box 6 Use the cursor keys to select the stored data file that you want to convert to a CSV file You can select either a stored data file WTS extension or a header file HDS extension 7 Press SET to confirm the selection and to convert the selected...

Page 243: ...ata that is stored to USB memory USB 0 0 or USB1 0 the CSV file is created in the same directory as the numeric data files that it is converted from Note CSV files are created from a pair of files that consists of a stored numeric data file wts and a header file hds with the same name Do not change the names of stored numeric data wts and header hds files for different sets of data to the same nam...

Page 244: ...ee below for the contents of the menu 10 4 Saving Screen Image Data 10 4 Saving Screen Image Data Setup Menus Used in This Chapter To set a parameter access its menu by pressing the appropriate panel key The setup menus and menu items used in this chapter are shown below along with the sections that correspond to their operating instructions 10 3 Saving Setup Parameters Waveform Display Data and N...

Page 245: ...is supported Whether you connect to the left or right USB port the port that you connect USB memory to first is recognized as storage medium USB0 0 When the power switch is on the USB memory is detected and enabled approximately few seconds after it is connected the time varies depending on the USB memory The detected USB memory is automatically assigned an ID number of 2 or greater Note Do not co...

Page 246: ...60201 01E Saving and Loading Data 3 2 1 4 5 6 7 8 9 10 11 12 13 14 App Index General USB Handling Precautions Follow the general handling precautions that are included with your USB memory 10 2 About USB Memory ...

Page 247: ...e 2 Use the cursor keys to select File Item 3 Press SET to display the data type selection box 4 Use the cursor keys to select a data type from Setup to Numeric 5 Press SET to confirm the selection If you select Setup or Wave proceed to step 11 in Executing or Canceling the Save Operation on page 10 6 If you select Numeric proceed to Selecting What Numeric Data to Save on page 10 5 ...

Page 248: ...that they will be saved Unselecting All Numeric Data Types 8 Use the cursor keys to select All OFF in the Preset row 9 Press SET The indicators to the left of all elements and measurement functions turn off to show that they will not be saved Selecting a Preset Group of Numeric Data Types 8 Use the cursor keys to select Preset1 or Preset2 in the Preset row 9 Press SET The indicators to the left of...

Page 249: ...lect Save 12 Press SET to display the Save menu 13 Use the cursor keys to select File List 14 Press SET to display the File List dialog box Selecting a Storage Medium 15 Use the cursor keys to select the storage medium displayed using brackets that you want to save to 16 Press SET to confirm the selection Selecting a Directory Follow these procedures if the storage medium has directories 17 Use th...

Page 250: ...e the keyboard to enter the file name For instructions on how to use the keyboard see section 3 14 Entering Values and Character Strings 26 Enter text into Comment just as you did in File Name 27 Press ESC to close the Save dialog box Saving 28 Use the cursor keys to select Save Exec 29 Press SET Data is saved to the specified path indicated after Path The Save Exec menu item changes to Abort Abor...

Page 251: ...the cursor keys to select File List 33 Press SET to display the File List dialog box 34 Use the cursor keys to select Filter 35 Press SET to select Item or All 10 3 Saving Setup Parameters Waveform Display Data and Numeric Data ...

Page 252: ...ving Waveform Display Data You can save waveform display data if you select Wave in the File Item menu Waveform Display Data That Is Saved The waveform display data that is saved is the data that corresponds to U1 to U3 and I1 to I3 displayed on the screen see section 7 3 for details Data Format Waveform display data is saved in ASCII format You can analyze the data on a PC You cannot load the dat...

Page 253: ...below Measurement functions used in normal measurement see section 2 2 for details Measurement functions used in harmonic measurement optional When you save numeric data places without numeric data will be blank or contain one of the following strings NAN INF INF or ERROR The places that contain blank spaces are in functions such as the ones for the 0th and 1st harmonic orders of fU and fI where t...

Page 254: ...urement function symbols see section 2 2 Measurement Functions and Measurement Periods section 2 5 Computation section 2 6 Integration and appendix 1 Symbols and Determination of Measurement Functions You can only select wiring unit Σ when it has been selected according to the procedure described in section 4 2 Selecting a Wiring System The maximum harmonic order that can be saved is determined by...

Page 255: ...he cursor keys to select Format 3 Press SET to display the data format selection box 4 Use the cursor keys to select one of the following data formats TIFF BMP Post Script PNG or JPEG 5 Press SET to confirm the selection Selecting a Color Mode You can only select a color mode if you selected TIFF BMP PNG or JPEG in step 4 6 Use the cursor keys to select Color 7 Press SET to display the color mode ...

Page 256: ...ntering a Comment 12 Use the cursor keys to select Comment 13 Press SET A keyboard appears on the screen 14 Use the keyboard to enter a comment For instructions on how to use the keyboard see section 3 14 Entering Values and Character Strings Selecting a Storage Medium and Directory 15 Use the cursor keys to select File List next to Save Path 16 See Selecting a Storage Medium and Selecting a Direc...

Page 257: ... select Auto Naming 22 Press SET to select ON or OFF 23 Press ESC to close the Screen Image Output Settings menu Executing or Canceling the Save Operation Perform the following steps in the display that you want to save an image of Press IMAGE Screen image data is saved to the specified path indicated after Path If you press IMAGE again during the save operation the operation will be cancelled An ...

Page 258: ...ng the Storage Medium and Directory See Selecting the Storage Medium and Directory under Explanation in section 10 3 Auto Naming Feature See Auto Naming Feature under Explanation in section 10 3 Note Up to 1000 files and directories can be displayed in the file list If there are more than a total of 1000 files and directories in a given directory the file list for that directory will only display ...

Page 259: ...are blinking If you do the USB memory may be damaged and its data may be corrupted Procedure 1 Press FILE to display the File menu 2 Use the cursor keys to select File Item 3 Press SET to display the function selection box 4 Use the cursor keys to select Setup 5 Press SET to confirm the selection 6 Use the cursor keys to select Load 7 Press SET to display the File List dialog box and the Load menu...

Page 260: ...from 11 Press SET to confirm the selection The selected storage medium and directory appear in the upper left of the File List dialog box after Path Select and press SET to move up to the parent directory Selecting a File to Load 12 Use the cursor keys to select the file you want to load Loading 13 Use the cursor keys to select Load Exec 14 Press SET The selected file is loaded from the directory ...

Page 261: ...C that were saved using the WT500 File paths can be displayed using up to 41 characters If a path exceeds 41 characters an ellipsis appears at the end of the character string File names are not case sensitive Comments are case sensitive The following file names cannot be used due to MS DOS limitations AUX CON PRN NUL CLOCK COM1 to COM9 and LPT1 to LPT9 When a file s setup parameters are loaded the...

Page 262: ...dicators are blinking If you do the USB memory may be damaged and its data may be corrupted Procedure 1 Press FILE to display the File menu 2 Use the cursor keys to select Utility 3 Press SET to display the Utility menu and the File List dialog box 4 Use the cursor keys to select Function 5 Press SET to display the function selection box 6 Use the cursor keys to select Delete 7 Press SET to displa...

Page 263: ...e Medium 10 Use the cursor keys to select a file directory or storage media 11 Use the cursor keys to select All Set 12 Press SET Asterisks will appear next to all of the files in the displayed directory and these files will be deleted when you execute the delete operation The All Set menu item changes to All Reset Even if an asterisk appears next to the name of a directory the directory will not ...

Page 264: ...t directory Asterisks will appear next to the file names Asterisks will also appear next to directory names but the directories will not be deleted Note Deleted data cannot be recovered Be careful not to delete the wrong files Deletion will stop if an error occurs while the WT500 is deleting files Up to 1000 files and directories can be displayed in the file list If there are more than a total of ...

Page 265: ...the USB memory may be damaged and its data may be corrupted Procedure 1 Press FILE to display the File menu 2 Use the cursor keys to select Utility 3 Press SET to display the Utility menu and the File List dialog box 4 Use the cursor keys to select Function 5 Press SET to display the function selection box 6 Use the cursor keys to select Copy 7 Press SET to display the Copy menu ...

Page 266: ...l of the Files in a Directory or Storage Medium 10 Use the cursor keys to select a file directory or storage medium 11 Use the cursor keys to select All Set 12 Press SET Asterisks will appear next to all of the files in the displayed directory and these files will be copied when you execute the copy operation The All Set menu item changes to All Reset 13 Use the cursor keys to select All Reset 14 ...

Page 267: ...e Medium and Selecting a Directory under Procedure in section 10 3 Executing the Copy Operation 18 Use the cursor keys to select Copy Exec 19 Press SET to copy every file that has an asterisk next to it Executes the copy operation Copy Destination dialog box Copy Source dialog box 10 7 Copying Files ...

Page 268: ...on if there is already a file with the same name in that destination After executing the copy operation you cannot simply change the destination directory and then recopy the same files that you copied before You have to reselect the files that you want to copy Copying will stop if an error occurs while the WT500 is copying files Up to 1000 files and directories can be displayed in the file list I...

Page 269: ...RT STOP RESET HOLD SINGLE SHIFT MISC NULL LOCAL KEY LOCK Displays the MISC menu see below for the contents of the menu Setup Menus Used in This Chapter To set a parameter access its menu by pressing the appropriate panel key The setup menus and menu items used in this chapter are shown below along with the sections that correspond to their operating instructions MISC MISC key 11 3 Configuring TCP ...

Page 270: ...uter 1 Check that the WT500 power switch is off see section 3 4 for details 2 Connect one end of a UTP or STP cable to the ETHERNET 100BASE TX port on the rear panel 3 Connect the other end of the UTP or STP cable to a hub or router 4 Connect the PC to the hub or router in the same way 5 Turn the power switch on see section 3 4 for details PC Straight UTP cable or STP cable Network card WT500 ESC ...

Page 271: ...ings and changes 1 Press MISC to display the Misc Menu 2 Use the cursor keys to select Network 3 Press SET to display the Network menu 4 Use the cursor keys to select TCP IP Setup 5 Press SET to display the TCP IP Setup dialog box To Only Use DHCP 6 Use the cursor keys to select DHCP 7 Press SET to select ON 8 Use the cursor keys to select DNS 9 Press SET to display the DNS selection box 10 Use th...

Page 272: ... 13 Use the cursor keys to select Net Mask 14 Enter all four octets of the subnet mask of the network that the WT500 belongs to just as you did for the IP address Entering the Default Gateway Enter the default gateway according to the system or network that the WT500 belongs to If the system or network does not require a default gateway proceed to Turning On the DNS 15 Use the cursor keys to selec...

Page 273: ...you did for the IP address Entering the Address of the Secondary DNS Server Enter a secondary DNS server address if the system or network that the WT500 belongs to uses a secondary DNS server If a secondary server is not necessary proceed to Entering the Primary Domain Suffix 26 Use the cursor keys to select DNS Server2 27 Enter all four octets of the secondary DNS server address just as you did f...

Page 274: ...ring the Domain Name through Entering the Secondary Domain Suffix on the previous page If you select Auto you do not have to enter the information that you would normally enter by following the procedures from Entering the Domain Name to Entering the Secondary Domain Suffix because the WT500 uses the DHCP server to automatically enter the information for you Executing Bind Execute Bind to apply ne...

Page 275: ...st DNS The WT500 can only use DHCP if there is a DHCP server on the network Ask your network administrator whether DHCP is available When the WT500 DHCP setting is switched from OFF to ON it may take tens of seconds before the IP address can be retrieved Different information may be assigned to the WT500 each time it is turned on When accessing the WT500 from a PC using the FTP server feature see ...

Page 276: ...relates combinations of host names and domain names to IP addresses In an address such as AAA BBBBB com AAA is the host name and BBBBB com is the domain name You can use a host name and domain name to access the network instead of a numeric IP address Set the domain name the DNS server address and the domain suffix In a network that supports DHCP these values can be set automatically You can use a...

Page 277: ...heck with your network administrator DNS Server Is Available DNS ON OFF DNS Server Is Not Available Domain name DNS server address Domain suffix Set manually Set manually Set manually Does not need to be set Does not need to be set Does not need to be set In a network that supports DHCP these values can be assigned automatically For details consult your network administrator TCP IP Configuration E...

Page 278: ...0 through an independent Ethernet network enter the settings as indicated in the table below For details about the settings consult your system or network administrator Parameter Setting Note DHCP Specify an IP address Do not obtain an IP address automatically do not use DHCP IP address Example 192 168 211 255 IP address of the PC Subnet mask Example 255 255 255 0 Set to the same value as the WT50...

Page 279: ...E Ethernet Interface Optional 3 2 1 4 5 6 7 8 9 10 11 12 13 14 App Index 6 Configure the settings such as the IP address according to the previous table and then click OK 7 Restart the PC 11 3 Configuring TCP IP Settings ...

Page 280: ...Workstation FTP server feature Procedure 1 Press MISC to display the Misc Menu 2 Use the cursor keys to select Network 3 Press SET to display the Network menu 4 Use the cursor keys to select User Account 5 Press SET to display the User Account setup dialog box ...

Page 281: ...name to anonymous in step 8 9 Use the cursor keys to select Password 10 Press SET A keyboard appears on the screen 11 Use the keyboard to set the password For instructions on how to use the keyboard see section 3 14 Entering Values and Character Strings Setting the Timeout Value 12 Use the cursor keys to select Time Out 13 Press SET to display the timeout value entry box 14 Use the cursor keys to ...

Page 282: ...at you can use are 0 9 A Z _ parentheses and minus signs If you set the user name to anonymous a PC or workstation can access the WT500 without a password Setting the Timeout Value If the WT500 is not accessed within a given period of time specified by the timeout value it will disconnect from the network The timeout value can be set from 0 to 3600 s The default value is 600 s Note The WT500 can o...

Page 283: ...anation Ethernet Interface Option Availability Whether or not the WT500 is equipped with the Ethernet interface option is indicated next to Ethernet Interface in the System Overview window If Yes is displayed the Ethernet interface option is installed If No is displayed Ethernet interface option is not installed MAC Address The WT500 MAC address is a fixed preset address It is indicated next to Ma...

Page 284: ...ys Select and confirm menu items INTEGRATOR SETUP INPUT INFO START STOP RESET HOLD SINGLE SHIFT MISC NULL LOCAL KEY LOCK 12 4 NULL Feature 12 3 Zero Level Compensation 12 4 NULL Feature 12 5 Setting the Key and Shift Locks 12 5 Setting the Key and Shift Locks 12 3 Zero Level Compensation DisplaystheSETUPmenu seebelowforthecontentsofthemenu Setup Menus Used in This Chapter To set a parameter access...

Page 285: ... Do not short the RGB VIDEO OUT terminal or apply external voltage to it Doing so may damage the WT500 Video Signal Output Connector Pin Arrangement and Signal Assignments The connector s pin arrangement and signal assignments are explained in the table below Pin No Signal Name Specification 1 Red 0 7 Vp p 2 Green 0 7 Vp p 3 Blue 0 7 Vp p 4 5 6 GND 7 GND 8 GND 9 10 GND 11 12 13 Horizontal sync sig...

Page 286: ...o level compensation The WT500 automatically performs zero level compensation after you change the measurement range or input filter Note To make accurate measurements we recommend that you execute zero level compensation after warming up the instrument for at least 30 minutes Also the ambient temperature should be stable and within the specified range see chapter 14 for details If the measurement...

Page 287: ...LL feature is disabled when The WT500 is turned on A setup parameter file is loaded The settings are initialized You switch from direct input to external current sensor input during current measurement If the NULL feature is enabled or disabled while the display is held the NULL indicator will light or turn off but the held data will not be affected Also the NULL indicator will be highlighted DC v...

Page 288: ...en set press SHIFT once The SHIFT key light turns off Explanation Key Lock When the key lock is activated all key operations are disabled except for those of the power switch and SHIFT LOCAL KEY LOCK When the key lock is activated LOCK appears in the upper right of the screen Note The key lock remains on or off even after the power is turned off Shift Lock Activating the shift lock is like always ...

Page 289: ...easure 5 Press SET to display the Measure Settings dialog box 6 Use the cursor keys to select Sync Measure 7 Press SET to select Master or Slave You can only set one instrument as the master and one instrument as the slave Performing Synchronized Measurement Connect the external start signal input output connectors EXT CLK of the master and slave instruments using a BNC cable sold separately The s...

Page 290: ... delay time When the display is held Applies to the slave within 1 μs sample interval When the display is not held Applies to the slave within 63 ns sample interval Note The measurement of the master and slave cannot be synchronized under the following conditions When the data update rate differs between the master and slave During real time integration mode or real time store mode Follow the proc...

Page 291: ...d time Measurement start delay time External Start Signal Input Circuit and Time Chart Start input signal Start input signal 100 Ω 5 V Minimum pulse width Input delay time Measurement start Trigger occurrence CAUTION Applying a voltage outside of the range of 0 to 5 V to the EXT CLK connector can damage the WT500 12 6 Master and Slave Synchronized Measurement ...

Page 292: ...ement period settings 4 7 Check the FAQ at the following URL http www yokogawa com tm Turn the power off and then on again 3 4 Keys are not functioning Check the REMOTE indicator If the REMOTE indicator is lighted press LOCAL to turn it off Check that the key lock is off 12 5 Perform a key test If the test fails servicing is necessary 13 3 Triggering does not work Check the trigger conditions 7 5 ...

Page 293: ...t is probably unable to execute a format on this medium 9 3 616 to 620 File system failure Check using another disk If the same message still appears maintenance service is required 621 File is damaged Check the file 622 to 641 File system failure Check using another disk If the same message still appears maintenance service is required 643 to 653 Media failure Check the medium 655 to 664 File sys...

Page 294: ...network settings connection and disk capacity 763 FTP Error AppendData Confirm the network settings connection and disk capacity 764 FTP Error Client Handle Confirm the network settings and connection 765 FTP Error Others Confirm the network settings and connection 798 Failed to initialize network Confirm the network settings 11 3 13 2 Error Messages and Troubleshooting Methods ...

Page 295: ...s 5 9 847 Attempted to start integration in continuous integration mode when integration preset time was set to 0 5 8 848 Attempted made to start integration in real time counting integration mode when the end time had already passed 5 9 849 Attempted made to start storing in real time counting storing mode when the end time had already passed 9 3 850 Cannot be set or executed at current store sta...

Page 296: ... not match The system has been initialized Maintenance service is required 921 System Failed to Draw Display Maintenance service is required 922 Failed in communication with DSP Maintenance service is required 923 Transmit data abnormality from DSP Maintenance service is required 926 The USB device s power consumption exceeded the capacity of the USB hub 14 10 927 Disconnected USB device port 1 be...

Page 297: ...t Item menu 6 Use the cursor keys to select Memory or Key Board If you select Memory proceed to Performing a Memory Test If you select Key Board proceed to Performing a Panel Key and Keyboard Test Note The time display in the lower right of the screen may freeze during the self test Performing a Memory Test 7 Use the cursor keys to select Test Exec 8 Press SET The WT500 executes a memory test The ...

Page 298: ... pressed is tested 10 Press one of the cursor keys or Each time you press a cursor key an front panel indicator lights 11 You can exit the panel key test by pressing ESC twice Testing the Keyboard 12 Use the cursor keys to select Soft Key 13 Press SET A keyboard appears on the screen 14 Use the keyboard and check whether or not the characters that you enter appear correctly in the entry box For in...

Page 299: ...A dealer Panel Key and Keyboard Tests To test whether the front panel keys are operating properly press a key and check whether or not the name of the key appears on the screen If the front panel indicator turns on or off when the cursor keys and are pressed the keys are operating properly To exit the panel key test press ESC twice If the correct panel key names do not appear contact your nearest ...

Page 300: ...stem Overview Procedure 1 Press MISC to display the Misc Menu 2 Use the cursor keys to select System Overview 3 Press SET to display the System Overview window Explanation Displaying the System Overview You can view the model suffix code serial number firmware version element configuration and option configuration of the WT500 ...

Page 301: ...nd does not cover any other items or expendable items items which wear out The replacement period for expendable items varies depending on the conditions of use Refer to the table below as a general guideline Contact your nearest YOKOGAWA dealer to have parts replaced Part name Recommended Replacement Period LCD backlight 3 years Backup battery 3 years lithium ...

Page 302: ...ever is less External sensor input Peak value less than or equal to 10 times the measurement range Instantaneous maximum allowable input within 1 s Voltage Peak value of 2 kV or rms value of 1 5 kV whichever is less Current Direct input Peak value of 150 A or rms value of 45 A whichever is less External sensor input Peak value less than or equal to 10 times the measurement range Continuous maximum...

Page 303: ...val is 500 ms When the data update interval is 200 ms and the numeric value display is set to Matrix ALL Items Single List or Dual List the numeric display update interval is 400 ms Waveform display When the data update interval is within the range of 100 ms to 1 s the waveform display and data update intervals are approximately 1 s When the data update interval is 1 s or longer the waveform displ...

Page 304: ...voltage frequency fI FreqI current frequency The two frequencies fU and fI can be measured simultaneously from any installed element For signals that are not selected no data is displayed On models with the frequency measurement add on option the fU and fI of all elements can be measured simultaneously Voltage max and min V U pk Maximum voltage U pk Minimum voltage Current max and min A I pk Maxim...

Page 305: ... simple average IrmnΣ rectified mean value IacΣ AC component Active power W PΣ Apparent power VA SΣ Reactive power var QΣ Power factor λΣ Phase difference fΣ Integration Time Integration time WPΣ Sum of positive and negative watt hours WP Σ Sum of positive P consumed watt hours WP Σ Sum of negative P watt hours returned to the power supply qΣ Sum of positive and negative ampere hours q Σ Sum of po...

Page 306: ... included 3 Total harmonic values are determined from all harmonic components the 2nd order to the upper limit of harmonic analysis according to the equations in appendix 1 Measurement Functions that Indicate Fundamental Voltage and Current Phase Differences between and within Elements These measurement functions indicate the phase differences between the fundamental voltage U 1 of the smallest nu...

Page 307: ...directly applied current input add 3 3 0 5 rated range of range 5 mA For the external current sensor input add 3 3 0 05 rated range of range 2 mV The effective input range is within 300 of the range within 600 of the range if the crest factor is set to 6 Influence of temperature changes after zero level compensation or range change DC voltage accuracy add 0 02 of range C DC current accuracy add 50...

Page 308: ...requency Data update interval 100 ms 200 ms 500 ms 1 s 2 s 5 s Lower limit of measurement frequency 25 Hz 12 5 Hz 5 Hz 2 5 Hz 1 25 Hz 0 5 Hz Line filter influence When the cutoff frequency is 500 Hz 45 to 66 Hz Add 0 2 of reading Less than 45 Hz Add 0 5 of reading When the cutoff frequency is 5 5 kHz 66 Hz or less Add 0 2 of reading 66 to 500 Hz Add 0 5 of reading Conditions for detecting lead and...

Page 309: ...aused by current input Add 0 00013 I2 of reading to the power accuracies Add 0 00013 I2 of reading 0 0004 I of reading to the DC current and voltage accuracies I is the current reading A Even if the current input decreases the influence from self generated heat continues until the temperature of the shunt resistor inside the WT500 decreases Accuracy changes caused by data update interval When the ...

Page 310: ...f apparent power S Voltage accuracy current accuracy Accuracy of reactive power Q Accuracy of apparent power 1 0004 L2 1 L2 100 of range Accuracy of power factor λ λ λ 1 0002 cosf cos f sin 1 influence from the power factor when λ 0 100 1 digit when voltage and current are at the measurement range rated input Accuracy of phase difference f f cos 1 λ 1 0002 sin 1 influence from the power factor whe...

Page 311: ...nge of 0 0001 to 99999 9999 when applying the external current sensor VT or CT output to the instrument Input filter A line or frequency filter can be set See section 14 1 for details Averaging For measurement functions used in normal measurement The following kinds of averaging can be performed on voltage U Urms Umn Udc Urmn and Uac current I Irms Imn Idc Irmn Iac power P apparent power S and rea...

Page 312: ... 05 of reading when the external current sensor input is 50 mV or less Double the input signal level values when the crest factor is 6 Display resolution 99999 Minimum frequency resolution 0 0001 Hz Frequency measurement filter Frequency filter see section 14 1 Integration Item Specifications Modes Manual normal continuous real time normal and real time continuous Measurement functions See section...

Page 313: ...ric data can be scrolled through Display reset Resets the display order of the numeric data to the default order Waveform Display Item Specifications Number of display rasters 501 Display format Peak to peak compressed data Sample rate Approx 100 kS s Waveforms can be reproduced accurately up to approximately 5 kHz Time axis In the range of 1 to 500 ms div Must be less than or equal to 1 10 of the...

Page 314: ... 10 1 s Approx 120 hours Channel 3 10 100 ms Approx 4 hours Channel 3 20 1 s Approx 20 hours The maximum storage time may be lower than the values given above depending on factors such as user defined function and integration settings The USB direct save interval varies depending on the number of saves and the specifications of the memory The maximum file size is 1 GB The available storage media a...

Page 315: ...range rating 100 of range to the power accuracy For nth order component input add n m 1 50 of the nth order reading to the n mth order and n mth order of the voltage and current and add n m 1 25 of the nth order reading to the n mth order and n mth order of the power Add n 500 of reading to the nth component of the voltage and current and add n 250 of reading to the nth component of the power The ...

Page 316: ...lave Input delay time Within 1 μs 3 sample intervals when the display is held Applies to the slave Within 70 μs 3 sample intervals when the display is not held Applies to the slave When Used as a Synchronization Source Ext Clk during Normal Measurement Item Specifications Frequency range Same as the frequency range listed in section 14 6 Frequency Measurement Input waveform 50 duty ratio rectangul...

Page 317: ...at meets the USB Mass Storage Class specifications Power supply 5 V 500 mA2 for each port Ports 2 1 For more detailed information about supported USB devices contact your nearest YOKOGAWA dealer 2 You cannot connect devices whose maximum current consumption exceeds 100 mA to two different ports on the WT500 at the same time 14 11 GP IB Interface Option Item Specifications Usable devices NATIONAL I...

Page 318: ...m Ethernet 100BASE TX Data rate 100 Mbps max Communication protocol TCP IP Supported services FTP server DHCP DNS and remote control VXI 11 14 13 Safety Terminal Adapter Item Specifications Maximum allowable current 36 A Withstand voltage 1000 V CATIII Contact resistance 10 mΩ or less Contact section Nickel plating on brass or bronze Insulator Polyamide Core wire Maximum diameter 1 8 mm Insulation...

Page 319: ...ill be required to correct the interference C Tick EN55011 Class A Group 1 Cable conditions Ext Clk terminal Use a BNC cable 5 GP IB interface connector Use a shielded GP IB cable 5 RGB video signal output VGA connector Use a shielded D sub 15 pin VGA cable 5 USB port PC Use a shielded USB cable 5 USB port for peripheral devices Use a USB keyboard that has a shielded cable Ethernet connector Use a...

Page 320: ... 1 461 6 482 6 0 4 37 7 101 6 177 0 3 28 6 0 0 0 0 Rear view Unit mm Unless otherwise specified tolerances are 3 however tolerances are 0 3 mm when below 10 mm Caution Be sure not to block the instrument s ventilation holes when installing support under it Provide 80 mm or more of space around the instrument for ventilation JIS rack mount dimensions Rack mounting surface Rack mounting surface EIA ...

Page 321: ...ns see the notes at the end of page App 3 Voltage frequency fU FreqU Hz Current frequency fI FreqI Hz Continues on next page Table 1 3 The two frequencies fU and fI can be measured simultaneously from any installed element The PLL source frequency is excluded On models with the frequency measurement add on option the fU and fI of all elements can be measured simultaneously S2 P2 s P2 Q2 Q k Ur k I...

Page 322: ...gnal N is the number of data samples q is the sum of positive and negative ampere hours q is the sum of the values when i n in the above equation is positive q is the sum of the values when i n in the above equation is negative The unit of time is hours PS2 QS2 SS2 PS2 US V IS A U1 U2 2 I1 I2 2 U1 U2 U3 3 I1 I2 I3 3 Integration S functions When the watt hour integration method for each polarity is...

Page 323: ...n denotes the instantaneous current n denotes the nth measurement period The measurement period is determined by the synchronization source setting AVG denotes the simple average of the item in brackets determined over the data measurement interval The data measurement interval is determined by the synchronization source setting PΣ denotes the active power of wiring unit Σ Input elements are assig...

Page 324: ...k and I 1 L k Measurement Functions Used in Harmonic Measurement Methods of Computation and Determination Table 1 2 Continues on next page L dc P dc S dc U k 2 k min max U I k 2 k min max I P k k min max P Q k k min max Q F tan 1 P S P L S For details about the S and Q formula type settings see section 5 4 Note k denotes a harmonic order r denotes the real part and j denotes the imaginary part U k...

Page 325: ... U2 Phase difference between U1 1 and the fundamental voltage of element 2 U2 1 φU1 U3 Phase difference between U1 1 and the fundamental voltage of element 3 U3 1 φU1 I1 Phase difference between U1 1 and the fundamental current of element 1 I1 1 φU1 I2 Phase difference between U1 1 and the fundamental current of element 2 I2 1 φU1 I3 Phase difference between U1 1 and the fundamental current of ele...

Page 326: ...stituted Sampled Data Delta functions Data Determined with the Delta Computation and Corresponding Measurement Function Symbols The computation mode for F1 to F4 can be set to RMS MEAN RMEAN DC or AC Differential voltage and differential current Unmeasured line voltage and phase current computed in a three phase three wire system Note It is assumed that i1 i2 i3 0 The equations for voltage U and c...

Page 327: ... 1000V I input Terminal Direct I Direct input Range 40A External Sensor Range 10V Sensor Ratio 10 0000mV A Scaling Scaling Off Scaling Item VT VT 1 0000 CT 1 0000 Scaling Factor 1 0000 Sync Source Element Object Element1 Element2 Element3 Sync Source I1 I2 I3 Filters Line Filter Off Freq Filter Off Update Rate Update Rate 500ms Averaging Averaging Off Averaging Type Exp Exp Count 2 Lin Count 8 Int...

Page 328: ... computation option is installed Meas Type F Mode rms HOLD Hold Off FORM Numeric Form Numeric Form 4 Items ITEM Numeric Item No 1 Function Urms Element Σ Element1 Order FORM Wave Form Format Single Time div 5ms Trigger Settings Mode Auto Source U1 Slope Rise Level 0 0 Display Settings Interpolate Line Graticule Grid Scale Value ON Label OFF Wave Mapping Mode Auto User Setting U1 0 I1 0 U2 1 I2 1 U...

Page 329: ...anual Upper Lower T1 Urms Element1 Auto T2 Irms Element1 Auto T3 P Element1 Auto T4 S Element1 Auto T5 Q Element1 Auto T6 λ Element1 Auto T7 φ Element1 Auto T8 FreqU Element1 Auto FORM Vector displayed when the harmonic measurement option is installed Object ΣA Numeric On U Mag 1 000 I Mag 1 000 CURSOR Wave Wave Cursor OFF Wave C1 Trace U1 Wave C2 Trace I1 Wave C1 Position 100 Wave C2 Position 400...

Page 330: ...em Setup NULL Null OFF MISC Remote Control GP IB Address1 1 Date Time Display1 ON System Config Message Language1 ENG Menu Language1 ENG Crest Factor CF3 USB Keyboard JPN Network TCP IP Setup DHCP OFF DNS OFF User Account User Account Setup User Name anonymous Time Out sec 600 Self Test Test Item Memory KEY LOCK2 OFF 1 This setting is not affected when the WT500 is initialized MISC Initialize Sett...

Page 331: ...U FreqU 3 4 Urms3 Irms3 P3 S3 Q3 L3 F3 5 P1 WP1 WP 1 WP 1 Irms1 q1 q 1 q 1 6 P2 WP2 WP 2 WP 2 Irms2 q2 q 2 q 2 7 P3 WP3 WP 3 WP 3 Irms3 q3 q 3 q 3 8 P3 WP3 WP 3 WP 3 Irms3 q3 q 3 q 3 9 P1 P2 P3 P3 H1 H2 16 Item Display Page 1 Urms1 Irms1 P1 S1 Q1 L1 F1 fU FreqU 1 fI FreqI 1 U pk1 U pk1 I pk1 I pk1 CfU1 CfI1 2 Urms2 Irms2 P2 S2 Q2 L2 F2 fU FreqU 2 fI FreqI 2 U pk2 U pk2 I pk2 I pk2 CfU2 CfI2 3 Urms...

Page 332: ... F3 F4 F5 F6 F7 F8 H1 H2 F1 F2 F3 F4 6 U k I k P k S k Q k L k F k FU k FI k 7 Uthd Ithd Pthd FUi Uj FUi Uk FUi Ii FUi Ij FUi Ik Left side of the screen in the Single List and Dual List displays Page 1 Urms1 Irms1 P1 S1 Q1 L1 F1 Uthd1 Ithd1 Pthd1 2 Urms2 Irms2 P2 S2 Q2 L2 F2 Uthd2 Ithd2 Pthd2 3 Urms3 Irms3 P3 S3 Q3 L3 F3 Uthd3 Ithd3 Pthd3 4 Urms3 Irms3 P3 S3 Q3 L3 FUi Uj FUi Uk FUi Ii FUi Ij FUi I...

Page 333: ... power supplied by power companies is alternating current with sinusoidal waveforms The magnitude of alternating current can be expressed using instantaneous maximum rms and mean values Normally it is expressed using rms values The instantaneous value i of a sinusoidal alternating current is expressed by Imsinωt where Im is the maximum value of the current ω is the angular velocity defined as ω 2π...

Page 334: ... Current i Imsin ωt φ The time offset between the voltage and current is called the phase difference and φ is the phase angle The time offset is mainly caused by the load that the power is supplied to In general the phase difference is zero when the load is purely resistive The current lags the voltage when the load is inductive is coiled The current leads the voltage when the load is capacitive 0...

Page 335: ...age If a power supply or load is connected in a delta wiring configuration and no neutral line is present the phase voltage cannot be measured In this case the line voltage is measured Sometimes the line voltage is also measured when measuring three phase AC power using two single phase wattmeters the two wattmeter method If the magnitude of each phase voltage is equal and each phase is offset by ...

Page 336: ...e phase difference f The section above the horizontal axis in the figure below represents positive power power supplied to the load and the section below the axis represents negative power power fed back from the load The difference between the positive and negative powers is the power consumed by the load As the phase difference between the voltage and current increases the negative power increas...

Page 337: ... power discussed in the previous section S UI VA P UIcosφ W cosφ is called the power factor and is expressed as λ It indicates the portion of the apparent power that becomes true power Reactive Power If current I lags voltage U by f current I can be broken down into a component in the same direction as voltage U Icosf and a perpendicular component Isinf Active power P which is equal to UIcosf is t...

Page 338: ... component with a frequency that is an integer multiple twice or more of the fundamental frequency Harmonic distortion factor The ratio of the rms value of the specified nth order harmonic contained in the distorted wave to the rms value of the fundamental signal or all signals Harmonic order The integer ratio of the harmonic frequency with respect to the fundamental frequency Total harmonic disto...

Page 339: ...XL XL is called inductive reactance and is defined as XL ωL The unit of inductive reactance is Ω Inductance works to counter current changes increase or decrease and causes the current to lag the voltage L I U U I P 2 Capacity The current i when an AC voltage whose instantaneous value u Umsinωt is applied to a capacitive load C F is expressed by the equation below i Um XC sin Wt sin Wt P 2 Im P 2 ...

Page 340: ...edance Z is expressed by the equations below Z RS 2 XS 2 XS XL XC Parallel RLC Circuits The equation below expresses the current relationships when resistance RP Ω inductance L H and capacitance C F are connected in parallel I IRP 2 IL IC 2 U IRPXP RP 2 XP 2 φ tan 1 RP XP RP U 2 XL U XC U 2 RP 1 2 XL 1 XC 1 2 U RP 1 2 XP 1 2 U RP L C I IRP IL IC U U IC IL I IRP φ The relationship between resistanc...

Page 341: ...t iL is 5 A or more load resistance is 200 Ω or less the effect of iV on the measurement accuracy is 0 01 or less If the input voltage is 100 V and the current is 5 A iV 0 05 mA 100 V 2 MΩ so the effect of iV on the measurement accuracy is 0 001 0 05 mA 5 A SOURCE LOAD WT500 U I iV iL LOAD SOURCE U I I U As a reference the relationships between the voltages and currents that produce effects of 0 0...

Page 342: ...e two conceivable current flows load current iL and the current that flows through the stray capacitance iCs iL flows through the current measurement circuit then through the load and returns to the power source shown with a dotted line iCs flows through the current measurement source the stray capacitance and the earth ground of the outer case and then returns to the power source shown with a dot...

Page 343: ...r example if the synchronization source for input element 1 is set to I1 an integer multiple of the period of I1 becomes the measurement period By averaging the sampled data in this measurement period the WT500 computes the measured values for input element 1 such as U1 I1 and P1 Deciding Whether to Use Voltage or Current Input as the Synchronization Source Select an input signal with a stable inp...

Page 344: ...ment period Data update interval Measurement period Synchronization source Rising zero crossing Falling zero crossing When the Period of the Synchronization Source Cannot Be Detected If there is not more than one rising or falling zero crossing on the input signal set as the synchronization source within the data update interval the period cannot be detected Also the period cannot be detected if t...

Page 345: ...e the synchronization source to a signal that allows for more stable detection of the period switch from voltage to current or from current to voltage The frequency detection circuit is AC coupled The period of AC signals that have no zero crossing because of an offset can be detected if the AC amplitude is greater than or equal to the detection level of the frequency measurement circuit see Accur...

Page 346: ...evice can be measured more accurately Likewise if a three phase device is measured with input elements 1 2 and 3 using a three phase four wire system set the synchronization source of input elements 1 2 and 3 to the same signal To facilitate this sort of configuration the synchronization source setting on the WT500 is linked to the Σ wiring unit of the wiring system when independent input element ...

Page 347: ...lements 1 DC end and 2 AC end set the synchronization source of input elements 1 and 2 to the voltage or current on the AC power end input element 2 In the example shown in the figure below set the synchronization source of input elements 1 and 2 to U2 or I2 Power transformer Input AC power U1 and I1 Output AC power U2 and I2 U2 or I2 Input element 1 Input element 2 Synchronization Source Setup Ex...

Page 348: ...signal or the output signal will not be an integer multiple of the signal Single phase AC power Connect to input element 1 Three phase AC power Connect to input elements 2 and 3 using a three phase three wire system Power transformer AC power U1 and I1 AC power U3 and I3 AC power U2 and I2 U1 or I1 U2 or I2 U3 or I3 Input element 1 Input element 2 Input element 3 Synchronization Source Setup Examp...

Page 349: ...ame as left SHIFT off Commit b c d e f g h i j k l m n o p q r s t u v w x y z 1 2 3 4 5 6 7 8 9 0 Enter a b c d e f g h i j k l m n o p q r s t u v w x y z 1 2 3 4 5 6 7 8 9 0 Escape FILE menu Execute START STOP SETUP menu Execute STORE Execute CAL Execute HOLD Execute ELEMENT Execute LOCAL Execute IMAGE SAVE Execute SHIFT LOCK Release SHIFT LOCK Execute Release KEY LOCK Execute Release NULL MISC...

Page 350: ...he right Move cursor to the left Same as left Same as left Same as left Same as left Execute PAGE FIRST Execute PAGE LAST F1 F2 F3 F4 F5 F6 F7 Execute PAGE PREVIOUS Execute PAGE NEXT Move cursor to the right Move cursor to the left Move cursor down Move cursor up F8 F9 F10 F11 µ F12 Print Screen Scroll Lock Pause Insert Home Delete End Page Down Page Up Same as left Same as left Same as left Same ...

Page 351: ...g h i j k l m n o p q r s t u v w x y z 1 2 3 4 5 6 7 8 9 0 Enter a b c d e f g h i j k l m n o p q r s t u v w x y z 1 2 3 4 5 6 7 8 9 0 Escape FILE menu Execute START STOP SETUP menu Execute STORE Execute CAL Execute HOLD Execute ELEMENT Execute LOCAL Execute IMAGE SAVE Execute SHIFT LOCK Release SHIFT LOCK Execute Release KEY LOCK Execute Release NULL MISC menu Execute NUMERIC OTHERS menu FORM ...

Page 352: ...he right Move cursor to the left Same as left Same as left Same as left Same as left Execute PAGE FIRST Execute PAGE LAST F1 F2 F3 F4 F5 F6 F7 Execute PAGE PREVIOUS Execute PAGE NEXT Move cursor to the right Move cursor to the left Move cursor down Move cursor up F8 F9 F10 F11 µ F12 Print Screen Scroll Lock Pause Insert Home Delete End Page Down Page Up Same as left Same as left Same as left Same ...

Page 353: ...MS E1 UMN E1 UDC E1 URMN E1 UAC E1 I E1 IRMS E1 IMN E1 IDC E1 IRMN E1 IAC E1 P E1 S E1 Q E1 LAMBDA E1 PHI E1 FU E1 FI E1 UPPK E1 UMPK E1 IPPK E1 IMPK E1 CFU E1 CFI E1 ETA1 ETA2 WH E1 WHP E1 WHM E1 AH E1 AHP E1 AHM E1 SH E1 QH E1 TI E1 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No No Yes No No ...

Page 354: ...es Yes Yes No No No No No Yes No No No No No Yes Yes Yes No No No No F1rms F2rms F3rms F4rms F1mn F2mn F3mn F4mn F1dc F2dc F3dc F4dc F1rmn F2rmn F3rmn F4rmn F1ac F2ac F3ac F4ac DELTAF1RMS DELTAF2RMS DELTAF3RMS DELTAF4RMS DELTAF1MN DELTAF2MN DELTAF3MN DELTAF4MN DELTAF1DC DELTAF2DC DELTAF3DC DELTAF4DC DELTAF1RMN DELTAF2RMN DELTAF3RMN DELTAF4RMN DELTAF1AC DELTAF2AC DELTAF3AC DELTAF4AC DELTAF1RMS DELT...

Page 355: ...es Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes The following measurement functions can be used on models with the harmonic measurement option FU FI Uhdf Ihdf Phdf U_k I_k P_k S_k Q_k L_k F_k Uthd Ithd Pthd FU1 U2 FU1 U3 FU1 I1 FU1 I2 FU1 I3 UPHI IPHI UHDF IHDF PHDF UK IK PK SK QK LAMBDAK PHIK UTHD ITHD PTHD PHIU1U2 PHIU1...

Page 356: ...tem 8 11 Display Settings menu item 7 13 distorted wave App 18 distortion factor 2 21 6 12 DNS item 11 3 domain name 11 5 Domain Name item 11 5 Dual List menu item 5 2 Symbols Page ΔF Mode item 5 42 1 Fundamental setting 6 12 1 Total setting 6 12 104 keyboard App 29 109 keyboard App 31 180 Lead Lag setting 5 13 360 degrees setting 5 13 3P3W 3V3A setting 5 43 758931 3 10 A Page Abort item 10 7 acce...

Page 357: ...pp 18 fundamental frequency App 18 fundamental signal App 18 G Page Gate Way item 11 4 GP IB 2 37 Graph1 item 6 15 graphed element 6 15 graticule 7 13 8 11 Graticule item 7 13 grounding 3 5 H Page handling precautions 3 1 harmonic component App 18 harmonic distortion factor App 18 harmonic measurement 2 6 harmonic order 6 4 8 5 App 18 Harmonics menu item 6 8 6 10 6 12 Harmonics Settings dialog box...

Page 358: ...c data saving 10 4 numeric data storing 9 13 numeric data display App 7 numeric display 6 2 Numeric Form menu 5 2 Numeric item 6 20 O Page operand parameters setting 5 36 operands values substituted in 5 36 operating environment 14 18 Optimize Count item 9 5 options ii Order item 6 4 8 5 P Page package contents ii panel front 1 1 panel rear 1 1 panel top 1 2 panel key test 13 7 password 11 13 Pass...

Page 359: ...4 19 Sync Source Settings menu 4 19 system condition 2 38 System Config menu item 4 29 system configuration 2 1 system overview displaying 13 9 System Overview menu item 11 15 13 9 T Page TCP IP 11 3 TCP IP Setup menu item 11 3 temperature coefficient 14 7 14 9 Test Exec menu item 13 6 Test Item menu item 13 6 Thd Formula item 6 12 time 3 24 Time div item 7 4 time axis 7 4 8 9 Time Out item 11 13 ...

Page 360: ...rsor item 7 17 waveform display data saving 10 4 waveform labels 7 13 8 11 Wave Form menu 7 4 waveform screen assignment 8 10 Wave Items menu 7 3 WAVE key 7 2 Wave Label item 7 13 Wave Mapping menu item 7 11 Wiring menu item 4 2 4 5 5 9 wiring precautions 3 8 Wiring Settings dialog box 4 2 4 5 Wiring Settings menu 5 9 wiring system 2 10 4 2 wiring unit 2 5 4 4 WP Type item 5 31 wts 9 10 Z Page zer...

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YOKOGAWA WT500, User Manual

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