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4-2

IM 760401-01E

Typical Waveform Types and Differences in Measured Values between

Measurement Modes

The WT210/WT230 does not support the mean value measurement mode shown in the

table below.

Name

Measurement

mode

Waveform

RMS

value

Retified

mean value

Rectified mean

value calibrated

to the rms value

Linear

averaging

Sinewave

Half-wave

rectification

Full-wave

rectification

Direct

current

Triangular

wave

Square

wave

Pulse

RMS

—

V MEAN

D · Ep

· Ep

D · Ep

· Ep

2 2

· Ep

4 2

· Ep

2 2

· Ep

π τ

· Ep

2 2

· Ep

D · Ep

· Ep

Display

When duty D (= ) is applied.

4.1 Selecting the Measurement Mode

Summary of Contents for WT210

Page 1: ...Digital Power Meter IM 760401 01E 3rd Edition ...

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 01E ...

Page 3: ...or notice as a result of continuing improvements to the instrument s performance and functions The figures given in this manual may differ from the actual screen 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 par...

Page 4: ...ter Yes cutoff frequency 500 Hz Yes cutoff frequency 300 Hz MAX hold Yes WT200 Yes WT110E WT130 No Peak value display Yes WT200 Yes WT110E Option WT130 Yes Average active power during Yes WT200 Yes integration WT110E WT130 No Display update rate Select 0 1 0 25 0 5 1 2 Fixed to 0 25 s or 5 s Number of displayed digits Select 4 or 5 digits WT200 Select 4 or 5 digits WT110E WT130 Fixed to 4 digits I...

Page 5: ...l RS 232 C interface applies to the WT230 Power cord D UL CSA Standard power cord Part No A1006WD Maximum rated voltage 125 V Maximum rated current 7 A F VDE Standard Power Cord Part No A1009WD Maximum rated voltage 250 V Maximum rated current 10 A Q BS Standard Power Cord Part No A1054WD Maximum rated voltage 250 V Maximum rated current 10 A R AS Standard Power Cord Part No A1024WD Maximum rated ...

Page 6: ...347EF 1 250 V 1 A time lag attached to the fuse holder 3 24 pin connector A1004JD 1 For remote control and D A output provided only on options DA4 DA12 and CMP 4 Current input B9317CY 1 For the WT210 protective cover B9317GY 1 For the WT230 cover appropriate for the model provided 5 Rubber feet for the A9088ZM 1 Two pieces in one set One set provided hind feet 6 User s Manual IM760401E 011 This ma...

Page 7: ...0 V 4 Alligator clip adapter set 758929 1 Two pieces in one set for the 758917 measurement lead Rated voltage 1000 V 5 Fork terminal adapter set 758921 1 Two pieces in one set for the 758917 measurement lead Rated current 25 A 6 Safety terminal adapter set 758923 1 Two pieces in one set This type holds measurement wires in place using springs 7 Safety terminal adapter set 758931 1 Two pieces in on...

Page 8: ...l words are used on this instrument Handle with care To avoid injury death of personnel or damage to the instrument the operator must refer to the explanation in the user s manual or service manual Protective earth terminal To ensure safe operation if the current to be measured exceeds 7 A rms value use a cable or conductor that is capable of running a current higher than the current to be measure...

Page 9: ... external protective earth wire or disconnect the wiring of the protective earth terminal Doing so poses a potential shock hazard Defect of Protective Grounding Do not operate the instrument if the protective earth or fuse might be defective Also make sure to check them before operation Fuse To avoid the possibility of fire only use a fuse that has a rating voltage current and type that is specifi...

Page 10: ...hapter 7 Harmonic Measurement Function Option Explains the procedures for performing harmonic measurement Chapter 8 Store Recall Function of Measured Computed Data and Setup Parameters Describes how to store recall measured computed data and setup parameters to from the internal memory Chapter 9 External I O Function Describes how to use the remote control option D A output option and comparator o...

Page 11: ...ING Calls attention to actions or conditions that could cause serious injury or death to the user and precautions that can be taken to prevent such occurrences CAUTION Calls attentions to actions or conditions that could cause light injury to the user or damage to the instrument or user s data and precautions that can be taken to prevent such occurrences Tips Note Calls attention to information th...

Page 12: ...et up the display that is blinking 1 Press the SHIFT key to illuminate the SHIFT indicator and then press the SETUP OUTPUT key The output setup menu appears on display C 2 Press the or key to select rELAY The four selectable items appear repetitively by pressing either key 3 Press the ENTER key to confirm the settings The setup menu corresponding to the function selected in step 2 appears on displ...

Page 13: ...ing Precautions 3 1 3 2 Installing the Instrument 3 2 3 3 Wiring Precautions 3 4 3 4 For Making Accurate Measurements 3 7 3 5 Connecting the Power Supply 3 8 3 6 Turning ON OFF the Power Switch and Opening Message 3 9 3 7 Directly Wiring the Circuit under Measurement 3 11 3 8 Using an External PT or CT to Wire the Circuit under Measurement 3 13 3 9 Using an External Sensor to Wire the Circuit unde...

Page 14: ... Measurement Function 7 6 7 4 Setting the Harmonic Order and Displaying the Measured Harmonic Value 7 7 Chapter 8 Store Recall Function of Measured Computed Data and Setup Parameters 8 1 Storing Recalling Measured Computed Data 8 1 8 2 Storing Recalling Setup Parameters 8 5 Chapter 9 External In Output Function 9 1 Pin Arrangement and Pin Assignments of the External I O Connector Option 9 1 9 2 Re...

Page 15: ...nitialization Error and Execution Functions 13 19 13 5 Sample Program Output of Normal Measurement Data 13 22 13 6 Sample Program Output of Harmonic Measurement Data 13 25 Chapter 14 Communication Commands 2 System of Commands Complying to the IEEE 488 2 1992 Standard 14 1 Overview of IEEE 488 2 1992 14 1 14 2 Program Format 14 3 14 2 1 Symbols Used in Syntax Descriptions 14 3 14 2 2 Messages 14 3...

Page 16: ...lated Error Messages 14 61 Chapter 15 Maintenance and Troubleshooting 15 1 Adjustments 15 1 15 2 Calibration 15 6 15 3 In Case of Malfunctioning 15 13 15 4 Error Codes and Corrective Actions 15 14 15 5 Replacing the Fuse 15 16 15 6 Recommended Replacement Parts 15 17 Chapter 16 Specifications 16 1 Input 16 1 16 2 Accuracy 16 3 16 3 Functions 16 5 16 4 External Sensor Input EX1 and EX2 options 16 1...

Page 17: ...e Wire System Selecting the Wiring System S 8 Selecting the Measurement Range S 9 Selecting the Voltage Range S 9 Selecting the Current Range S 10 Turning ON the Power to the Circuit under Measurement S 11 Displaying Voltage Current and Active Power S 12 Displaying the Voltage on the Primary Side of the Inverter on Display A S 12 Displaying the Current on the Primary Side of the Inverter on Displa...

Page 18: ...the terminal Also make sure to fasten the input terminal screws securely so that the cable does not come loose Use cables with safety terminals that cover the conductive parts for connecting to the voltage input terminals Using a terminal with bare conductive parts such as a banana plug is dangerous when the terminal comes loose After connecting the measurement cable attach the current input prote...

Page 19: ...wire system Inverter Primary side Input Secondary side Output W2 W3 W1 Load Motor Power supplied by the source W2 Power consumed by the load W1 W3 100 Efficiency W2 Active power measured by input element 2 of the WT230 W1 Active power measured by input element 1 of the WT230 W3 Active power measured by input element 3 of the WT230 Wiring Single phase two wire Wiring Three phase three wire Installi...

Page 20: ...er cord into a power outlet 3 pin outlet Power cord included in the package WT230 Turning ON the Power to the WT230 For details see section 3 6 5 Press the power switch at the lower left corner of the front panel A test program starts when the power switch is turned ON After an opening message appears the WT230 is ready to make measurements To suppress the error in the measured value that occurs a...

Page 21: ...four wire model and the current measurement circuit and voltage measurement circuit on the primary side of the inverter Wiring Diagram SOURCE LOAD C Input terminal ELEMENT 2 SOURCE LOAD Inverter primary side V2 A2 C V V V VOLTAGE terminal C CURRENT terminal Wiring Example of a Current Measurement Circuit WT230 Inverter Moter TO SOURECE terminal CURRENT terminal Wiring Example of a Voltage Measurem...

Page 22: ...d voltage measurement circuit of the secondary side of the inverter and the motor Wiring Diagram SOURCE LOAD SOURCE Inverter secondary side Load Motor C A3 C V S U R W T V1 V V3 V U R V S W T Input terminal ELEMENT 3 Input terminal ELEMENT 1 C V C V A1 V VOLTAGE terminal C CURRENT terminal Wiring Example of a Current Measurement Circuit WT230 Inverter Motor To SOURCE Wiring Example of a Voltage Me...

Page 23: ...Guide 8 Attach the current input protection cover Before attaching the current input protection cover check that the input terminal screws are securely fastened WT230 Inverter Moter To SOURCE Current input protective cover Wiring the Circuit ...

Page 24: ...m V PF k A M W m V Hz k A M W 2 3 FUNCTION ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 VOLTAGE AUTO MODE CURRENT AUTO RANGE MAX HOLD TRIG CAL INTEGRATOR INTEG SET SHIFT KEY LOCK 1P3W 3P3W 3P4W 3V3A OUTPUT HARMONICS MEMORY REMOTE HOLD ENTER RESET WIRING START STOP LOCAL SETUP Wiring system indicator Press WIRING to select wiring system 3P3W Each time WIRING is pressed the wiring system indicator illuminat...

Page 25: ... 300 For a description of the other digital numbers and characters that are displayed on the 7 segment LED of each display see section 1 3 1 Press VOLTAGE The voltage range selection menu appears Display C shows the voltage range selection with blinking indication If the voltage range had been set to before this step AUTO indicator for the voltage range is illuminated the voltage range that is aut...

Page 26: ...s the current range selection with blinking indication If the current range had been set to before this step AUTO indicator for the current range is illuminated the current range that is automatically selected from the measured current is displayed blinking 5 Press or to show the desired current range on display C 6 Press ENTER The current range is confirmed Each display shows the measured values ...

Page 27: ...the circuit under measurement The power supply of the WT230 is connected Input terminal screws are securely fastened The current input protection covers are attached The power to the WT230 is ON and it is ready to make measurements 7 Turn ON the power to the circuit under measurement 8 Operate the inverter to rotate the motor Selecting the Measurement Range ...

Page 28: ...ator character of display A illuminates in the order shown below To show the measured voltage on display A we illuminate function V Display A FUNCTION V A W VA var TIME FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION m V k A TIME var var var var var var VA M W m V k A TIME VA M W m V k A TIME VA M W m V k A TIME VA M W m V k A TIME VA M W m V k A TIME VA M W The decimal point position moves so that t...

Page 29: ... we illuminate function A Display B FUNCTION V A W PF deg FUNCTION FUNCTION FUNCTION FUNCTION deg m V PF k A M W deg m V PF k A M W deg m V PF k A M W deg m V PF k A M W deg m V PF k A M W The decimal point position moves so that the measured value can be displayed within the number of digits available on display B The appropriate prefix symbol m 10 3 k 103 or M 106 of the unit illuminates accordi...

Page 30: ...NCTION FUNCTION FUNCTION FUNCTION FUNCTION W h A h W h h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W C h h m V Hz k A M W C h h m V Hz k A M W C h h m V Hz k A M W FUNCTION FUNCTION FUNCTION FUNCTION W h A h A h V A The decimal point pos...

Page 31: ... FUNCTION ELEMENT 1 2 3 Function indicator Element indicator 7 Press FUNCTION of display A to select function V For details see step 1 of page S 10 8 Press ELEMENT of display A to select input element 1 3 or Σ Each time ELEMENT is pressed the element indicator character of display A illuminates in the order shown below The wiring system of the circuit on the secondary side of the inverter is three...

Page 32: ...W 2 3 FUNCTION ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 Function indicator Element indicator V 9 Press FUNCTION of display B to select function A For details see step 3 of page S 11 10 Press ELEMENT of display B to select input element 1 3 or Σ Each time ELEMENT is pressed the element indicator character of display B illuminates in the order shown below The wiring system of the circuit on the secondar...

Page 33: ...elow The wiring system of the circuit on the secondary side of the inverter is three phase three wire and the circuit is connected to input elements 1 and 3 of the WT230 To show the measured value of input element 1 3 or Σ on display C we illuminate input element 1 3 or Σ Display C ELEMENT ELEMENT ELEMENT ELEMENT 1 2 3 Σ 1 2 3 1 2 3 1 2 3 1 2 3 When input element 1 is illuminated the active power ...

Page 34: ...ar deg h h VA M W m V PF k A M W m V Hz k A M W 2 3 FUNCTION ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 VOLTAGE AUTO MODE CURRENT AUTO RANGE MAX HOLD TRIG CAL INTEGRATOR INTEG SET SHIFT KEY LOCK 1P3W 3P3W 3P4W 3V3A OUTPUT HARMONICS MEMORY REMOTE HOLD ENTER RESET WIRING START STOP LOCAL SETUP SETUP MATH SETUP MATH EFFI For a description of the other digital numbers and characters that are displayed on th...

Page 35: ...ing flow chart illustrates steps 1 to 5 In the procedural explanation in chapter 4 and beyond similar flow diagrams are used Select the four arithmetic operation function Display C ENTER 3 SETUP 1 ENTER 4 2 5 End of setting Display C Displaying the Efficiency ...

Page 36: ...CTION W h A h W h h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W h h m V Hz k A M W C h h m V Hz k A M W C h h m V Hz k A M W C h h m V Hz k A M W FUNCTION FUNCTION FUNCTION FUNCTION W h A h A h V A Display example of efficiency C h h m V Hz k A M W FUNCTIO...

Page 37: ...s selected in step 4 of page S 18 efficiency is displayed Confirmation Example of the Displayed Efficiency The following figure shows the case in which displays A B and C are showing the active power on the primary side of the inverter power supplied by the source the active power on the secondary side of the inverter power consumed by the load and the efficiency respectively If we divide the valu...

Page 38: ...t element 1 Input section input element 2 Input section input element 3 CPU section Voltage input section LPF A D Zero Cross Detector ISO A D interface Lead Lag Detector EEPROM CPU PLL RAM EEPROM D A Output Serial RS 232 C GP IB ROM RAM or DSP For WT210 option Option Option Option Current input section LPF A D Zero Cross Detector ISO Current input section LPF A D Zero Cross Detector Current Over D...

Page 39: ...ltage current and active power sums the values over a predetermined period and then divides the sum by the number of samples to derive the measured value of voltage current and active power In addition to achieve high accuracy the start and end points of sampling are determined by synchronizing to the zero crossing point of the voltage or current signal that you select to be measured From the volt...

Page 40: ...y Wiring System The input units for voltage or current are located on the rear panel of this instrument These units are called input elements The number of input elements depends on the model and the possible wiring systems are shown in the table below The wiring system indicates the circuit configuration for measuring voltage current and power The name of the system varies depending on the phase ...

Page 41: ...ion as well as other measured computed values can be displayed even while the integration is in progress Moreover since integrated values of negative polarity can be displayed the consumed watt hour ampere hour value of the positive side and the watt hour value returning to the power supply of the negative side can be displayed separately Frequency Measurement Function This function measures the f...

Page 42: ... PC via the communication interface You can also set various functions of the WT210 WT230 from your PC Output Function to an External Plotter and Printer Measured computed data can be printed on an external plotter or printer via the GP IB or serial RS 232 C interface Other Functions Backup Function of Setup Parameters This function backs up setup parameters including computed values if the power ...

Page 43: ...R S T Small c Small h U V W X Y Z Exponent Initial Menus Each function of the WT210 WT230 is set using a menu that appears on the display The initial menu that appears when the operation keys are pressed are shown below Voltage Range Setting Display C 1 VOLTAGE 2 When the crest factor is set to 3 Display C 1 VOLTAGE 2 When the crest factor is set to 6 Current Range Setting Display C 1 CURRENT 2 Fo...

Page 44: ...d digits Select the crest factor Initialize the setup parameters Select the display update rate Integration Setting 1 SHIFT RESET INTEG SET Display C 2 Set the integration mode Set the integration timer Set the rated integration time Turning the Harmonic Measurement Function ON OFF 1 SHIFT START HARMONICS Display C 2 Set OFF Set ON Sets the target element WT230 only Set the PLL source Select the c...

Page 45: ... the comparator and relay output Setting Communication Interface GP IB 1 LOCAL Display C 2 Set addressable mode Set talk only mode Set the print mode and plotter or printer output Set communication commands according to IEEE488 2 1992 Setting Communication Interface Serial 1 LOCAL Display C 2 Set normal mode Set talk only mode Set the print mode and plotter or printer output Set communication comm...

Page 46: ...xternal sensor input connector Section 3 9 Power connector Section 3 5 Power connector Section 3 5 Power fuse Section 15 5 Power fuse Section 15 5 Protective earth terminal Page vi External sensor input connector Section 3 9 Voltage input terminal Sections 3 7 to 3 9 Voltage input terminal Sections 3 7 to 3 9 Current input terminal Sections 3 7 to 3 8 Current input terminal Sections 3 7 to 3 8 GP ...

Page 47: ...s 6 3 and 7 4 Function Unit display Operation status indicator Indicates data updating voltage current range check and measurement mode status Sections 2 3 4 1 and 4 3 Displays the setup menu for turning ON OFF harmonic measurement and setting the PLL source Sections 7 2 and 7 3 Releases the communication remote status when the REMOTE indicator is illuminated Displays the setup menu for the output...

Page 48: ...dicator Indicates data updating voltage current range check and measurement mode status Sections 2 1 4 1 and 4 13 Displays the setup menu for turning ON OFF harmonic measurement setting the PLL source and the element to be measured Sections 7 2 and 7 3 Releases the communication remote status when the REMOTE indicator is illuminated Displays the setup menu for the output mode to the plotter printe...

Page 49: ...s the conditions for auto range switching For details on the auto range function see section 4 4 CHECK RANGE VOLTAGE CURRENT CHECK RANGE VOLTAGE CURRENT WT210 indicator WT230 indicator Display When the Measured Value is too Small If the measured voltage or current drops below 0 5 less than or equal to 1 if the crest factor is set to 6 of the rated range the condition is indicated as shown below Th...

Page 50: ...ndling Precautions Do not place objects on top of the instrument Never place other instruments or any objects containing water on top of the instrument Such act can lead to malfunction When Carrying the Instrument First turn off the object to be measured and remove all cables including measurement cables and communication cables Then turn OFF the WT210 WT230 and remove the power cord from the outl...

Page 51: ... use the instrument in the following 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 16 When installing the instrument in a place where the ambient humidity is 30 or below take measures to prevent s...

Page 52: ...ling out along the rotation axis approximately 10 mm The handle on the WT230 is removed by removing the handle attachment cover and unfastening the handle attachment screws WT210 model 760401 WT230 model 760502 760503 Rotation axis At handle rest position 8 pull out along the rotation axis approximately 10 mm to remove the handle Cover Cover Handle For details on the steps described below see the ...

Page 53: ... connectors external sensor input connectors Using a terminal with bare conductive parts is dangerous when the conector comes loose When the voltage of the circuit under measurement is being applied to the current input terminals do not touch the external sensor input connector Since these terminals are electrically connected inside the instrument this act is dangerous When connecting measurement ...

Page 54: ...of each module in chapter 16 Instantaneous Maximum Allowable Input 1 period for 20 ms Voltage Input Peak value of 2 8 kV or RMS value of 2 0 kV whichever is less Current Input 5 mA to 200 mA range 2 5 mA to 100 mA range if the crest factor is set to 6 WT210 only Peak value of 150 A or RMS value of 100 A whichever is less 0 5 A to 20 A range 0 25 A to 10 A range if the crest factor is set to 6 comm...

Page 55: ...dangerous The terminal is a binding post The screws used on the terminal binding post are M6 screws Either wind the wire around the screw or pass the crimp on lugs through the screw axis then tighten firmly by holding the terminal knob 3 1 2 1 6 7 Unit mm Note On the WT230 model 760502 760503 you must set the wiring system using the WIRING key after wiring the circuit For the procedure see section...

Page 56: ...esistance is 200 Ω or less then the effect of iV on the measurement is 0 1 0 3 mA 300 mA or less If the input is 600 V and 3 A the effect on the measurement accuracy is 0 01 0 3 mA 3 A Source Load WT210 WT230 V C iV iL Source Load C Input terminal Element V V VOLTAGE terminal C CURRENT terminal As a reference the following figure shows the relationship between the voltage and current that cause 0 ...

Page 57: ...function will be compromised Connecting the Power Cord 1 Check that the power switch is OFF 2 Connect the power cord plug to the power connector on the WT210 WT230 Use the power cord that came with the package 3 Connect the plug on the other end of the power cord to the outlet that meets the conditions below The AC outlet must be of a three pin type with a protective earth ground terminal Item Spe...

Page 58: ...ter the test program terminates the WT210 WT230 will not operate properly Turn OFF the power switch immediately and contact your nearest YOKOGAWA dealer When contacting your dealer please give them the model name suffix code and instrument No written on the name plate on the side panel and the displayed error code Note If an error code appears check the information in section 15 4 Error Codes and ...

Page 59: ... B C NO YES Ready to make measurements All specified specifications and options displayed The display varies depending on the specified specifications and options For WT210 For 760502 Displays the item that was specified before the power was turned OFF 11 12 10 9 10 9 GP IB mode GP IB address Serial communication mode Serial communication handshaking Serial communication format Serial communicatio...

Page 60: ...nt capacity Wiring example of a single phase two wire system 1P2W Can be applied to models 760401 760502 and 760503 Source Load C Input termonal Element V V VOLTAGE terminal C CURRENT terminal Source Load C Input terminal Element V V VOLTAGE terminal C CURRENT terminal Source Load V A C V Source Load V A C V Wiring example of a single phase three wire system 1P3W Can be applied to models 760502 an...

Page 61: ... terminal Elemnt 1 V V VOLTAGE terminal C CURRENT terminal U R V S W T N C Input terminal Element 2 V load C Input terminal Element 3 V V2 V A2 C Wiring example of a three voltage three current system 3V3A Can be applied to model 760503 Source Load A1 C A3 C V1 V V3 V U R N V S W T Source C Input terminal Element 1 V V VOLTAGE terminal C CURRENT terminal U R V S W T C Input terminal Element 2 V Lo...

Page 62: ...imum measuring range If the maximum voltage exceeds 600 V 300 V if the crest factor is set to 6 connect an external potential transformer PT and connect the secondary side of the PT to the voltage input terminals If the maximum current exceeds 20 A 10 A if the crest factor is set to 6 connect an external current transformer CT and connect the secondary side of the CT to the current input terminals...

Page 63: ...three phase three wire system 3P3W when using a PT CT Can be applied to models 760502 and 760503 Source L l CT PT V v Load L l CT PT V v V S W T U R Input terminal Element 1 Input terminal Element 3 C V C V Wiring example of a three phase four wire system 3P4W when using a PT CT Can be applied to model 760503 Source Load L l CT PT V v L l CT PT V v L l CT PT V v V S W T U R N Input terminal Elemen...

Page 64: ...nal sensor input terminal the voltage of the circuit appears across the current input terminals Use connectors with safety terminals that cover the conductive parts for connecting to the external sensor input terminals of the WT210 WT230 If the connector comes loose voltage appears at the conductive parts making them extremely dangerous CAUTION The measurement current flows through the thick lines...

Page 65: ...rent sensor cable become large In this case use an isolation sensor CT DC CT or clamp LOAD Clamp type current sensor V Voltage input terminal External sensor input connector EXT Make sure you have the polarities correct when making the connections Otherwise the polarity of the measurement current will be reversed and correct measurements cannot be made Be especially careful when connecting the cla...

Page 66: ...l shunts When connecting a clamp type sensor replace the shunt type sensor with the clamp type Wiring example of a single phase two wire system 1P2W when using an external shunt Can be applied to models 760401 760502 and 760503 Source Load Connection side External shunt OUT L OUT H Input terminal Element External sensor input connector EXT C V Wiring example of a single phase three wire system 1P3...

Page 67: ... S W T N OUT L OUT H Input terminal Element 3 Input terminal Element 1 Input terminal Element 1 OUT L OUT H External sensor input connector EXT C V External sensor input connector EXT C V External sensor input connector EXT C V Wiring example of a three voltage three current system 3V3A when using an external shunt Can be applied to model 760503 Source Load U R V S W T OUT L OUT H OUT L OUT H Inpu...

Page 68: ... Single phase two wire system 3P3W Three phase three wire system In case of a measurement circuit of single phase two wire system and having selected either element 1 or 3 selecting any of the above mentioned wring methods will result in correct measurement computation However the measurement computation results in case element Σ has been selected lose the physical meaning WT230 model 760503 The w...

Page 69: ...surement modes can be selected for measurement of voltage and current The initial value is RMS Indicator Voltage Current RMS Measures and displays true Measures and displays true RMS RMS value value VOLTAGE MEAN Displays rectified mean value Measures and displays calibrated to the RMS value true RMS value DC Displays DC value obtained by Displays DC value obtained by averaging averaging the input ...

Page 70: ...rated to the rms value Linear averaging Sinewave Half wave rectification Full wave rectification Direct current Triangular wave Square wave Pulse Pulse RMS V MEAN DC Ep 2 Ep 2 Ep 2 Ep Ep 3 Ep D Ep τ 2π Ep 2 π Ep Ep π 2 π Ep Ep Ep 2 Ep D Ep τ 2π Ep Ep 2 Ep 2 2 Ep 2 π 2 2 Ep π 4 2 Ep π 2 2 Ep π τ 4π 2 Ep πD 2 2 Ep D Ep τ 2π Ep 2 π Ep 0 0 Ep π 0 2π Ep π 0 2π Ep π 0 2π Ep Ep π 0 2π Ep π 0 2π Ep 0 2π E...

Page 71: ...UP 1 m V k A V TIME ar deg h h VA M W m V PF k A M W m V Hz k A M W 2 3 FUNCTION ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to con...

Page 72: ...ect under test is a switching power supply and the distortion in the voltage waveform is less than that of the current waveform set the synchronization source to V Voltage waveform Current waveform For example if the object under test is an inverter and the distortion in the current waveform is less than that of the voltage waveform set the synchronization source to A Voltage waveform Current wave...

Page 73: ...ON ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the ope...

Page 74: ...TER key disables the line filter function The LINE indicator turns OFF Frequency Filter This filter is inserted only into the frequency measurement circuit The cutoff frequency is 500 Hz Since the WT210 230 is making measurements in sync with the input signal the frequency of the input signal must be measured correctly on Selecting on and pressing the ENTER key enables the frequency filter functio...

Page 75: ...selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Setting the Voltage Range Display C 1 VOLTAGE ENTER 3 2 End of setting The left figure shows the selections when the crest factor is set 3 The selections when the crest factor is set to 6 are shown below Auto 300 150 75 30 15 7 5 Settting ...

Page 76: ...eak value instantaneous voltage or current value that is sampled exceeds approximately 300 of the rated range the range is increased the next time the measured value is updated On the WT230 when any of the input elements meets the above condition the range is increased the next time the measured value is updated Range down When the measured value of the voltage or current is less than or equal to ...

Page 77: ...00 00 W 600 00 W 1 2000 kW 3 0000 kW 6 0000 kW 12 000 kW 3V3A 600 00 600 00 W 1 2000 kW 2 4000 kW 6 0000 kW 12 000 kW 24 000 kW Three phase four wire 15 000 22 500 W 45 000 W 90 000 W 225 00 W 450 00 W 900 00 W 3P4W 30 000 45 000 W 90 000 W 180 00 W 450 00 W 900 00 W 1 8000 kW 60 000 90 000 W 180 00 W 360 00 W 900 00 W 1 8000 kW 3 6000 kW 150 00 225 00 W 450 00 W 900 00 W 2 2500 kW 4 5000 kW 9 000...

Page 78: ...rrent Range Range V 250 00 mA 500 00 mA 1 0000 A 2 5000 A 5 0000 A 10 000 A 7 5000 1 8750 W 3 7500 W 7 5000 W 18 750 W 37 500 W 75 000 W 15 000 3 7500 W 7 5000 W 15 000 W 37 500 W 75 000 W 150 00 W 30 000 7 5000 W 15 000 W 30 000 W 75 000 W 150 00 W 300 00 W 75 000 18 750 W 37 500 W 75 000 W 187 50 W 375 00 W 750 00 W 150 00 37 500 W 75 000 W 150 00 W 375 00 W 750 00 W 1 5000 kW 300 00 75 000 W 15...

Page 79: ...ction uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to th...

Page 80: ...etting is to select to which element scaling will be applied The initial value is ALL At the WT210 this selection menu will not appear ALL Select this when the same scaling constant should be applied to all elements together EL1 Select this when the scaling constant should only be applied to element 1 EL2 Select this when the scaling constant should only be applied to element 2 This selection will...

Page 81: ...initial value is oFF on Selecting on and pressing the ENTER key will start scaling and the SCALING indicator will light oFF Selecting oFF and pressing the ENTER key will stop scaling and SCALING indicator will extinguish Note If scaling constant measurement range exceeds 9999M 106 computation overflow OF is indicated 4 5 Setting the Scaling Value When External PT CT is Used ...

Page 82: ... the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Setting the Scaling Constant of the External Sensor In...

Page 83: ...0 WT230 Setting Example of Scaling Constant for External Sensor Input In case the rated specs of the external sensor are 50 A 50 mV measurement range is 50 mV then 50 A 50 mV 50 mV 50 A scaling constant is 50 00 In case the rated specs of the external sensor are 100 A 50 mV measurement range is 50 mV then 100 A 50 mV 50 mV 100 A scaling constant is 100 00 In case the rated specs of the external se...

Page 84: ...to element 3 only After having selected ALL or EACH and entered the scaling constant press the ENTER key to end this scaling setting Selecting the Measurement Range Current with Scaling function ON After having set the scaling constant select the menu for the current measurement range Select the rated output of the external sensor from this menu refer to the Operating Procedure on the previous pag...

Page 85: ... M W m V Hz k A M W 2 3 FUNCTION ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current...

Page 86: ...ere averaged such as the peak Vpk Apk values averaging is not performed on them Selecting the Type of Averaging The following two selections are available The initial value is Lin Exponential Averaging EP Exponential averaging is expressed by the following equation D Dn 1 Mn Dn 1 K where Dn the value at the nth display Dn 1 the exponentially averaged value at the n 1th display Mn the measurement v...

Page 87: ...ecting oFF and pressing the ENTER key will stop averaging and the AVG indicator will extinguish Note The average coefficient is common to exponential average and moving average If you change the averaging process change the averaging coefficient also The averaging function that can be used during harmonic measurement is exponential averaging The attenuation constant is fixed to 8 Therefore the set...

Page 88: ...nction The maximum values MAX of V voltage A current W active power VA apparent power var reactive power Vpk voltage peak and Apk current peak can be held while the MAX hold function is enabled When a value greater than the held value is measured the larger value is held The initial setting is oFF on The MAX HOLD indicator illuminates and the MAX hold function is enabled oFF The MAX HOLD indicator...

Page 89: ...MENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicate...

Page 90: ...of the inverter Inverter Primary side W1 Secondary side W3 Output side Equation Efficency 100 W3 W1 For the three phase four wire model 760503 Computes the efficiency by taking the active power W2 measured on element 2 as the active power applied to the primary side of the inverter and the active power W1 and W3 measured on elements 1 and 3 as the power consumed by the secondary side of the invert...

Page 91: ...explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The...

Page 92: ...he result of Peak of V2 rms of V2 for 760503 only Displays the result of Peak of V3 rms of V3 for 760502 and 760503 Displays the result of Peak of A1 rms of A1 Displays the result of Peak of A2 rms of A2 for 760503 only Displays the result of Peak of A3 rms of A3 for 760502 and 760503 Note Definition of crest factor PEAK value RMS value If the RMS value is less than or equal to 0 5 less than or eq...

Page 93: ...3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step...

Page 94: ...action Multiplication Division Exponent When the display A function is indicating the elapsed integration time TIME the computed result indication is no data If the value of the display B function is less than or equal to 0 0001 of the rated range computation overflow oF is indicated Application Example Displays the result of display A display B Computation example Any Display A Display B Display ...

Page 95: ...VA on display C Computation example Any Display A Display B Display C Wiring method V1rms A1rms A1rms A1rms Displays the result of display A display B When computing the absolute value of impedance Computation example Any Display A Display B Display C Wiring method V1rms A1rms Z V1rms A1rms V1 A1 SOURCE LOAD Displays the result of display A display B Line voltage ratio and line current ratio for a...

Page 96: ...CE LOAD Var1 A1rms X Var1 A1rms 2 W1 A1rms R W1 A1rms 2 Any Display A Display B Display C Wiring method VA1 A1rms Z VA1 A1rms 2 Displays the result of display A 2 display B When computing resistance R Computation example V1rms W1 R V1rms 2 W1 Any Display A Display B Display C Wiring method V1 A1 SOURCE LOAD 4 11 Performing Four Arithmetical Operation ...

Page 97: ...ENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated...

Page 98: ... elapsed integration time Displays the computed result of watt hour of element 2 Wh2 the elapsed integration time 760503 only Displays the computed result of watt hour of element 3 Wh3 the elapsed integration time 760502 and 760503 Displays the computed result of watt hour of element S SWh3 the elapsed integration time 760502 and 760503 The value of watt hour ΣWh varies depending on the wiring sys...

Page 99: ... V k A V TIME ar deg h h VA M W m V PF k A M W m V Hz k A M W 2 3 FUNCTION ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a...

Page 100: ...sed integration time and harmonic measurement values harmonic distortion and phase angle are not affected by the number of displayed digits set in this section For details see the sections describing each item Selecting the Display Update Rate You can select the display update rate of the measured or computed results shown on the display from the choices below The UPDATE indicator blinks in sync w...

Page 101: ... A V TIME ar deg h h VA M W m V PF k A M W m V Hz k A M W 2 3 FUNCTION ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a sel...

Page 102: ...mum current range is as follows Direct input range 5 mA to 20 A 2 5 mA to 10 A if the crest factor is 6 20 A 10 A if the crest factor is 6 External sensor input range Option EX1 2 5 V to 10 V 1 25 V to 5 V if the crest factor is 6 10 V 5 V if the crest factor is 6 External sensor input range Option EX2 50 mV to 200 mV 25 mV to 100 mV if the crest factor is 6 200 mV 100 mV if the crest factor is 6 ...

Page 103: ...B C FUNCTION V A W VA var TIME V A W PF deg FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION V A W V Hz A Hz Wh Ah Ah Wh Wh Ah FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION V A Wh and Ah will light twice and are displayed on the top of display C You can reverse the order by firs...

Page 104: ...played digits is 5 for voltage current and power Units V voltage A current W power Prefix m k or M Selecting the Display Function The following selections are available V voltage will be displayed A current will be displayed W active power will be displayed Selecting the Input Element The type of input element which can be selected depends on the model number Make your selection after having verif...

Page 105: ...SHIFT key followed by the FUNCTION key 2 Selecting the Input Element Select the input element by pressing the ELEMENT key of display A or B The operation is the same as the one described on page 5 1 Explanation Maximum Reading Unit and Unit Prefix Maximum reading of apparent and reactive power 99999 when the number of displayed digits is 5 Display range of power factor 1 0000 to 1 0000 when the nu...

Page 106: ...e input element by pressing the ELEMENT key of display B The operation is the same as the one described on page 5 1 Explanation Display Range and Unit Display range G180 0 to d180 0 G meaning phase lag d meaning phase lead Unit deg Selecting the Display Function When you select deg the phase angle will be displayed Selecting the Input Element 1 2 3 Displays the measurement values of element 1 2 3 ...

Page 107: ...ssing the FUNCTION key of display C V A W V Hz A Hz Wh Ah Ah Wh Wh Ah FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION V A Display C Wh and Ah will light twice and are displayed on the top of display C You can reverse the order by first pressing the SHIFT key followed by the FUNCTION key 2 Selecting the Input Element Sele...

Page 108: ...cy is larger than the measurement range the display will show ErrHi This instrument measures the frequency after synchronizing to the cycle of the input signal We recommend to turn ON the frequency filter when measuring an inverted waveform or a waveform with high noise However depending on the signal s frequency and level ErrLo might appear on the display This is because the filter with a cutoff ...

Page 109: ... section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure 1 1 Selecting the display Function Select either efficiency crest factor four arithmetical operations average active power voltage peak value or current peak value by pressing the FUNCTION key Display C V A W V Hz A Hz Wh Ah Ah Wh Wh Ah FUNCTI...

Page 110: ... arithmetic operations and average active power 9999 Unit Average active power W Others efficiency crest factor and four arithmetic operations No unit Prefix Four arithmetic operations and average active power m k or M Others efficiency and crest factor No prefix Note Depending on the computed item computation overflow or no data may be indicated rather than a value Efficiency If the denominator o...

Page 111: ...e integrated value reaches the maximum value 999999 MWh MAh or when the integrated value drops to the minimum value 99999 MWh MAh when the elapsed integration time reaches the maximum of 10000 hours Integration holds the elapsed integration time and integrated values at the point where integration stopped will be held until the RESET key is pressed Max integrated value 999999 MWh MAh Integrated va...

Page 112: ...ue Elapsed integration time Start Reset Hold Integration timer preset time Stop Hold Integration timer preset time Integration timer preset time Integration Methods The computing equations are shown below The result is displayed using time conversion Power integration i 1 n v i i i Current integration RMS I 1 N AI DC i 1 n i i vi and ii are instantaneous values of voltage and current n is the numb...

Page 113: ...ere hour value Ah 2 RMS VOLTAGE MEAN 0 DC negative ampere hour value 1 When the Wh function is selected pressing the FUNCTION key once or twice will result in Wh Pressing the FUNCTION key once will result in displaying the positive watt hour value whereas pressing the FUNCTION key twice will result in displaying the negative watt hour value In case of the negative watt hour value will appear in fr...

Page 114: ... differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Selecting the Integr...

Page 115: ...on time The setting ranges from 0 00 00 0 hrs 00 min 00 s to 10000 00 00 10000 hrs 00 min 00 s The initial value is 0 00 00 0 00 00 When nor is selected on the integration menu the manual integration mode will become valid If Cont is selected an error code is displayed when integration is started and the integration is not performed s 0 00 01 to 10000 00 00 The time during which integration will b...

Page 116: ...h current or average active power during integration Display A C FUNCTION V A W VA var TIME FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION V A W V Hz A Hz Wh Ah Ah Wh Wh Ah FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION V A Wh and Ah will light twice and are displayed on the top of display C You can reverse the order by f...

Page 117: ...ive watt hour value Ah displays the total ampere hour values Ah displays the total ampere hour values or the positive ampere hour value the average active power during integration is displayed if the function is specified in the computation settings see section 4 12 For more details refer to page 6 3 Selecting the Input Element 1 2 3 Displays the measurement values of element 1 2 3 Σ Displays the ...

Page 118: ...maximum number of digits used to display the elapsed time of integration is nine when the hour minute and second digits are added together The WT210 WT230 displays the elapsed time of integration on display A However because the maximum number of digits that can be displayed on display A is five all the digits of the elapsed time of integration may not be displayed in certain cases Therefore the n...

Page 119: ...the time of cancellation ON HOLD OFF Displayed value Elapsed integration time Dotted line shows integrated value START STOP RESET Even when stopping integration while the hold function is on the displayed integrated value will remain unchanged However as soon the hold function is turned off or a trigger is activated the integrated results of the time when integration was stopped will be displayed ...

Page 120: ... Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Wiring system only WT230 Measurement synchronization source Measurement mode Filter Measurement range Crest factor Scaling Averaging MAX hold Display function Input element only WT230 Number of displayed digits Display update rate Hold Trigger Integration mode Integration timer Integration start Integration stop Integration reset Harmonic measurement option S...

Page 121: ...de is RMS VOLTAGE MEAN and the current input drops below 0 5 less than or equal to 1 if the crest factor is set to 6 of the rated range the ampere hour value is integrated as zero 0 Valid Frequency Range for Integration The sample rate is approximately 50 kHz The voltage current signal frequencies that are valid for the integration are as follows Integrated Item Valid Frequency Range for Integrati...

Page 122: ...power factor of the fundamental 1st order Displays the voltage harmonic distortion proceeded by t on display B Displays the current harmonic distortion proceeded by t on display B Displays the relative harmonic content of the voltage of the order shown on display A Displays the relative harmonic content of the current of the order shown on display A Displays the relative harmonic content of the ac...

Page 123: ...splay update rate from 0 25 s 0 5 s 1 s 2 s and 5 s For the setup procedure see section 4 13 Note The display update rate of 0 1 s appears as a possible selection when the harmonic measurement function is ON However it cannot be selected If the display update rate had been set to 0 1 s when the harmonic measurement function was OFF the rate is changed to 0 25 s when you turn ON the harmonic measur...

Page 124: ... function has been turned ON When the PLL synchronization is being re established Until the initial measured data are obtained after having changed the settings When the analysis order which depends on the fundamental frequency exceeds the upper limit after having set the order at display A When the display function is set to relative harmonic content and the order at display A is set to 1 When th...

Page 125: ...nd Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Setting the Target Element WT230 only SHIFT START HARMONICS ENTER 3 Display C 2 Set the element D...

Page 126: ...frequency is 500 Hz or less and high frequency components are present The cutoff frequency of this filter is 500 Hz The filter is valid only for the PLL source If the amplitude of the input signal selected as the PLL source is smaller than the rated range value PLL synchronization may sometimes fail In this case it is suggested that a suitable measurement range be selected so that the input level ...

Page 127: ...o leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Turning the Harmonic Measurement Function ON OFF SHIFT START HARMONICS Display C 2 ENTER 3 End of setting 1 Explanation Turning the Harmonic Measurement Function ON OFF on Pressing the ENTER key after selecting on will result in starting of the harmonic measure...

Page 128: ...ement function is turned ON Setting the Harmonics Order 1 Light up the display function indicator of display A Display A Light up display function V A W FUNCTION FUNCTION FUNCTION FUNCTION 2 Set the harmonics order Display A Displaying the Measured Harmonic Values Displays each measured value after having set the display function of either display B or C FUNCTION V A W PF FUNCTION FUNCTION FUNCTIO...

Page 129: ...isplayed digits is 5 is 0 000 to 99 999 to 100 00 to 999 99 A Shows the relative harmonic content of the current corresponding to the order shown on display A The display range when the number of displayed digits is 5 is 0 000 to 99 999 to 100 00 to 999 99 W Shows the relative harmonic content of the active power corresponding to the order shown on display A The display range when the number of di...

Page 130: ...asurement The range of fundamental frequencies in case of harmonic measurement is 40 to 440 Hz However depending on internal timing there are cases where measurements in the 20 to 700 Hz range can be performed A Hz Shows the fundamental frequency of the current of the PLL source The rest is the same as in case of V Hz Note In case you select an input element using the ELEMENT key which is not the ...

Page 131: ... FUNCTION ELEMENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the...

Page 132: ...f harmonic measurement 760401 600 Blocks 30 Blocks 760502 300 Blocks 30 Blocks 760503 200 Blocks 30 Blocks Items which can be stored When storing normal measured data harmonic measurement function is turned OFF Each measured computed integrated data of normal measurement will be stored However only either the voltage frequency or current frequency will be stored If either one of the display functi...

Page 133: ... 00 will be stored as integration preset time When the fundamental frequency is high and up to 50 orders of harmonic measurement data are not present the bar display will be stored as data While storage is in progress several settings cannot be changed such as switching the harmonic measurement function ON OFF changing the target element the PLL source the harmonic distortion factor computation me...

Page 134: ...erval select the recall menu once again The initial value is oFF on Recalling will start by pressing the ENTER key after selecting on the RECALL indicator will light while recalling is in progress oFF Recalling will stop by pressing the ENTER key after selecting oFF the RECALL indicator will extinguish Note During recalling the measurement conditions range will become as those of the data being re...

Page 135: ...see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Storing Setup Parameters 1 SHIFT STOP MEMORY ENTER 3 Select stora...

Page 136: ... output settings store recall settings and communication settings When data are saved in a file and you want to save data in the same file display C will show SAVEd Pressing the ENTER key will result in overwriting the previously saved data Setup parameters are saved in another internal memory than measured data Saved setup parameters are backed up by the lithium battery in the same way as measure...

Page 137: ...t can be done The connector s pin sequence and signal assignment is as follows Connector s Pin Arrangement WT210 760401 WT230 760502 760503 24 13 1 12 Rear panel 1 12 13 24 Rear panel Pin Assignment 0 01 µF 0 022 µF 5 V Remote control input circuit TTL level L H 5 V Remote control output circuit 10 kΩ 10 kΩ 100 Ω 0 to 0 8V 2 0 to 5V TTL level L H 0 to 0 4 V 8 mA 2 4 to 5 V 400 µA DA4 specification...

Page 138: ...Output Output Output Output Output Output Input Input Input Output Input Input No Connection CMP specifications for WT210 WT230 760401 760502 760503 remote control 4 channel D A output 4 channel comparator output 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Pin No Signal Pin No Signal EXT STOP EXT HOLD INTEG BUSY DA 3ch EXT START DA 1ch RELAY 3ch NC COM NO RELAY 1ch NC COM NO DIG...

Page 139: ...l according to the timing chart below Updating Display Data which has been held same function as TRIG key Measurement start EXT TRIG 5 ms min 250 ms or more and display update interval or more Display update EXT TRIG 5 ms min Display update 5 ms min Display update interval or more Measurement start Update timing during normal measurement integration Update timing while harmonic analysis function i...

Page 140: ... confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Setting the D A Output 1 SHIFT SETUP OUTPUT ENTER 3 Select the D A output function Display C 2 4 Select the output format Display C ENTER 5 End of setting select default setting Set output channel Display B 6 12 ENTER 7 Set the ...

Page 141: ... of the Output Format D A The default items which will be output can be selected as follows dFLt n normal measurement values are set as default Select this when you want to output normal measurement values Which items are output to which channel is described below Option Model ch1 ch2 ch3 ch4 ch5 ch6 ch7 ch8 ch9 ch10 ch11 ch12 DA4 760401 DA12 CMP 760502 760503 760401 760502 760503 V A W Hz V1 V3 Σ...

Page 142: ...4 4 channels DA12 12 channels CMP 4 channels Setting the output function corresponds to column A in the procedure The output function can be set to any of the following V voltage A current P active power VAr reactive power VA apparent power PF power factor VFrq voltage frequency 1 AFrq current frequency 1 Ph total Watt hour Wh Ah total Ampere hour dEG phase angle VP peak value of voltage AP peak v...

Page 143: ...on 4 8 is enabled will be the maximum values MAX that are held The values for D A output are also set to the maximum values MAX that are held The D A output of each output item is configured so that 5 0 VFS is output when the value corresponding to the range rating of the voltage current or power is applied Even when scaling constants for voltage current and power are specified the D A output is a...

Page 144: ...ayed value Output 140 Approx 7 0 V 100 5 0 V 0 0 V 100 5 0 V 140 Approx 7 0 V D A output Approx 7 5 V Approx 7 0 V 5 0 V 0 5 0 V 100 100 140 140 Approx 7 0 V Approx 7 5 V Displayed value For PF and deg points in the range from 5 to 7 V and from 5 to 7 V are not output If there is an error the output will be about 7 5 V If the MATH setting is set to efficiency the output will be 5 V for 100 For Vp ...

Page 145: ...mes the display update rate or less Note Since this relay is subject to wear it is excluded from the 3 year warranty CAUTION Damage to the relays may occur when a voltage or current exceeding the specified range is applied to the contact output terminal Comparator Mode The following two comparator modes are available Single Mode If the measured computed and integrated values exceed the previously ...

Page 146: ...uit becomes closed When the current value lies below 1 A or exceeds 3 A NO GO will be determined and the circuit becomes open Current Time Upper limit Hi Lower limit Lo 3 A 1 A Limit of ch2 is set to 1 A Limit of ch1 is set to 3 A Current Time Upper limit Hi Lower limit Lo 3 A 1 A Limit of ch2 is set to 1 A Limit of ch1 is set to 3 A Current Time Upper limit Hi Lower limit Lo 3 A 1 A Limit of ch2 ...

Page 147: ...h these control signals with other equipments to eliminate erroneuous control Displayed error Relay status oL over range The NC contact is closed oF over flow The NC contact is closed dEGEr phase angle error The NC contact is closed PFErr power factor error The NC contact is closed ErrLo frequency error The NC contact is closed ErrHi frequency error The NO contact is closed for this case only FrqE...

Page 148: ...t point are kept 1 SHIFT SETUP OUTPUT ENTER 3 Select the comparator function Display C Display C 2 4 ENTER 5 6 Select the mode Display C ENTER 7 End of setting Explanation Setting the Comparator Mode The following two settings are available For details see pages 9 9 and 9 10 The initial value is SinGL SinGL the comparator mode will be set to single mode duAL the comparator mode will be set to dual...

Page 149: ...lowing the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Setting the Comparator Limit Values in case of Normal Measurement 1 SHIFT SETUP OUTPUT ENTER 3 Select the comparator function Display C Display C 2 4 ENTER 5 Set the...

Page 150: ...element 1 to 3 11 moves to the C column 12 selects from harmonic order 01 to 50 2 3 1 4 ENTER 1 When you press the key at step 19 the output channel displayed at display C will change to the next channel i e from ch1 to ch2 and so forth 2 Depends on the model number Refer to the explanation for more details 3 As the maximum order of harmonic analysis data varies by the fundamental frequency there ...

Page 151: ...0 to 9999 Initial setting ch1 V type 1 element 600 0 value E 0 exponent 600 V voltage limit of element 1 for channel 1 ch2 A type 1 element 20 00 value E 0 exponent 20 00 A current limit of element 1 for channel 2 ch3 P type 1 element 1 200 value E 3 exponent 1 2 kW active power limit of element 1 for channel 3 ch4 PF type 1 element 1 000 value E 0 exponent Power factor 1 limit of element 1 for ch...

Page 152: ...channel 4 Selecting the exponent The following selections are available The initial value is as described above E 3 10 3 E 0 100 E 3 103 E 6 106 Note The values of V voltage A current W active power VA apparent power var reactive power Vpk voltage peak and Apk current peak while the MAX hold function see section 4 8 is enabled will be displayed according to the maximum values MAX that are held The...

Page 153: ...A M W m V Hz k A M W 2 3 FUNCTION ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the curren...

Page 154: ...A and B illuminates Limit value Display the limit value of ch1 or ch3 by Measured or computed data Corresponding to the relay on display A and B Limit value Displays the limit value of ch2 or ch4 by The limit values on display A and B will show the pairs of ch1 ch2 and ch3 ch4 alternately by pressing the keys Check the displayed limit value unit or the limit value setting menu to see which pair is...

Page 155: ...the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept 1 SHIFT SETUP OUTPUT ENTER 3 Select the comparator function Display C Display C 2 ENTER 5 4 End of setting Explanation Turning the Comparator Function ON OFF After having set all the items described on the previous pages turn the comparator function ON on The comparator function will star...

Page 156: ...unctions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Selecting the Output Mode 1 LOCAL ENTER 3 2 ENTER 5 4 Communication settings depend on your communica...

Page 157: ...Display C ENTER 9 End of setting 6 6 sets the A column output function 7 moves to the B column 8 selects from element 1 to 3 A B SHIFT 1 Activating the Output SHIFT SETUP OUTPUT ENTER 3 Execute the output Display C 2 End 1 Select data or setup parameters Display C ENTER 5 End of setting Execute the output 4 9 9 Outputting to an External Plotter Printer ...

Page 158: ...Prints the numerical values and the graph of the measured active power values G Vd Prints the numerical values and the graph of the phase angle between each voltage of the 2nd to 50th order and the fundamental 1st order G Ad Prints the numerical values and the graph of the phase angle between each current of the 2nd to 50th order and the fundamental 1st order CG V Prints the numerical values and t...

Page 159: ...m G V of harmonic measured data 100 0 10 00 1 000 100 0m 10 00m 1 20 10 30 40 50 Model M 760503 HRM V Range 60V A Range 1A Function V 1 Sync PLL V1 Freq V1 60 00 Hz V1 rms 49 98 V A1 rms 0 002 A W1 0 02 W DEG1 LEAD 50 1 deg PF1 0 641 V1 THD IEC 12 01 A1 THD IEC 95 58 Harmonic Voltage List Or Volt V Cont Or Volt V Cont 1 49 62 3 5 50 11 09 5 1 99 4 01 7 1 01 2 03 9 0 62 1 24 11 0 41 0 82 13 0 30 0 ...

Page 160: ... Source PLL V1 Harmonics Off Display A Order 01 Harmonics Element Element 1 Distortion Formula IEC Communication Command 0 Element 1 Element 2 Element 3 Sigma V 2 998 2 993 2 999 2 997 A 49 910 49 924 49 937 49 924 W 0 00 0 00 0 00 0 0000k VA 149 63 149 42 149 77 0 4488k Var 149 63 149 42 149 77 0 1496k PF 0 0000 0 0000 0 0000 0 0000 DEG 90 0 90 0 90 0 90 0 HzV 59 999 Integrator Start Integrator T...

Page 161: ...WT210 WT230 to be controlled using commands from the controller The command system before the IEEE St d 488 2 standard can be used The WT210 WT230 outputs data when a data output request command OD is received This mode allows data to be read at an arbitrary time 488 2 Mode Like the addressable mode this mode allows the WT210 WT230 to be controlled using commands from the controller This mode allo...

Page 162: ... polling nontalker on MLA My Listen Address talk only capability listener L4 Basic listener capability nonlistener to MTA My Talk Address no listen only capability service request SR1 full service request capability remote local RL1 full remote local capability parallel poll PR0 no parallel polling capability device clear DC1 full device clear capability device trigger DT1 full device trigger capa...

Page 163: ...gger Updates the measured computed data when in hold mode Same function as the SHIFT HOLD TRIG key LLO Local Lockout Invalidates the LOCAL key on the front panel to inhibit transfer from remote control to local control Switching between Remote and Local Mode When switched from local to remote mode The REMOTE indicator will light up and all panel keys except the LOCAL key cannot be operated Setup p...

Page 164: ... bit is set to 1 and the SRQ is set to True Store Recall Busy DIO 5 This bit is set to 1 when storing recalling of data is in progress This bit cannot be disabled by the IM command since it is a status bit Even if this bit is set to 1 SRQ will not be affected Over DIO 4 This bit is set to 1 and SRQ is set to True when an overrange occurs in the measured data However this is not valid if the bit ha...

Page 165: ...r CA2 A2 crest factor CA3 A3 crest factor A B display A display B A B display A display B A B display A display B A B display A display B Wh Positive watt hour Wh Negative watt hour Ah Positive ampere hour Ah Negative ampere hour HMS Elapsed time of integration MEM Data number in case of recalling Items that can be output for efficiency and crest factor vary depending on the model h4 Element 1 Ele...

Page 166: ...hanging the display C to something different than VHz or AHz will not result in changing the object of measurement of frequency When selecting the output items yourself and you set a frequency item which is not object of measurement 999999 E 03 no data will be output The displayed values of V voltage A current W active power VA apparent power var reactive power Vpk voltage peak and Apk current pea...

Page 167: ... data Terminator A1 data Terminator W1 data Terminator Frequency Display C Terminator END Terminator Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Data number Terminator The data number will only be output in case of recall WT230 760502 V1 data V3 data SV data Terminator A1 data A3 data SA data Terminator W1 data W3 data SW data Terminator Frequency Display C Terminator END Terminator Line 1 Line 2 Li...

Page 168: ...r Ah1data Ah3data SAhdata Terminator END Terminator Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Data number Terminator The data number will only be output in case of recall Frequency Elapsed integration time Terminator WT230 760503 W1 data W2 data W3 data SW data Terminator Wh1data Wh2data Wh3data SWhdata Terminator Ah1data Ah2data Ah3data SAhdata Terminator END Terminator Line 1 Line 2 Line 3 Line ...

Page 169: ...ither IEC or CSA CNT Relative harmonic content MEM Data number in case of recalling h4 Element 1 Element 1 2 Element 2 3 Element 3 h5 Data state N normal I Overrange O Computation overflow P Peak overflow E No data h6 h7 Order 01 to 50 Order of fundamental or higher harmonic up to the maximum analysis order __ space will be assigned in case of frequency harmonic distortion power factor or in case ...

Page 170: ...e angle Terminator END Terminator Line 1 Line 2 Line 3 Line 50 Line 51 Phase angle between fundamentals of voltage and current Frequency Phase angle between fundamental and 2nd harmonic of current Terminator Phase angle between fundamental and 2nd harmonic of voltage Terminator Phase angle between fundamental and 3rd harmonic of voltage Terminator Phase angle between fundamental and 50th harmonic ...

Page 171: ...The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1...

Page 172: ...ler Interval In case of the talk only mode this setting specifies the interval to output data Setting range 00 00 00 0 hr 00 min 00 sec to 99 59 59 99 hrs 59 min 59 sec Initial value 00 00 00 When set to 00 00 00 the interval is equal to the display update rate In addition when the specified interval is shorter that the display update rate the data is output using the display update rate Terminato...

Page 173: ...y following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are kept Setting the Output Item in case of Normal Measurement 10 Sets the A column output function 11 Moves to the B column 12 Select from element 1 to 4 except and 1 S...

Page 174: ...ay C Display C 2 ENTER 5 4 Set the output item Display C ENTER 9 End of setting 6 6 Sets the A column output function 7 Moves to the B column 8 Select from element 1 to 3 A B SHIFT When graph printouts are selected as the output item only data values will be output by communication 10 6 Setting the Output Items ...

Page 175: ...requency 1 Ph total watt hour Wh Ah total ampere hour dEG phase angle VP peak value of voltage AP peak value of current MATH computation t1 elapsed integration time Ph positive watt hour Wh Ph negative watt hour Wh Ah positive ampere hour 2 Ah negative ampere hour 2 no output 1 If either one of the display function V Hz or A Hz is turned on the frequency of the corresponding function is output If ...

Page 176: ...ets averaging ON OFF AT m Averaging Type selects exponential averaging or moving AC m Averaging Coefficient averaging sets attenuation constant or averaging number Crest factor CF m Crest Factor Sets the crest factor MAX hold KH m peaK Hold sets MAX hold MATH MT m MaThematics sets computing equation Number of displayed DS m Display reSolution sets the number of displayed digits digits Display rang...

Page 177: ...m1 m2 m3 sets integration time integrate Rated Time CMP option YO m relaY On sets comparator function ON OFF YM m relaY Mode sets comparator mode DY m Display relaY sets display relay ON OFF for comparator YC m relaY Channel sets the display channel when comparator display is ON OY m1 m2 m3 m4 m5 sets the output relay function for normal Output relaY function measurement OYH m1 m2 m3 m4 m5 m6 sets...

Page 178: ...rs output request error code output request Transmission measured and computed data output setting parameters output error code output status byte output Talk only mode Transmission measured and computed data output Normal Mode This mode is equivalent to the the addressable mode of the GP IB function and enables reception of commands and transmission of data Measured data is output on reception of...

Page 179: ...g User can select whether to control only transmission or both transmission and reception using X on and X off signals X on ASCII 11H X off ASCII 13H Receive buffer size 256 bytes WARNING The connectors used in this function have protective covers When the covers are removed or when using connectors the voltage ratings across the measuring input and the ground become as follows Voltage between CUR...

Page 180: ...ter Signal direction output 3 BB RXD Received Data Data received from personal computer Signal direction input 4 CA RTS Request to Send Signal used to handshake when receiving data from personal computer Signal direction output 5 CB CTS Clear to Send Signal used to handshake when transmitting data to personal computer Signal direction input 6 CC DSR Data Set Ready Signal used to handshake when tra...

Page 181: ...Signal ground Transmitted data Received data Request to send Clear to send Data set ready Data terminal ready Ring indicator Data channel received carrier detect Data signal quality detect Data signal rate select Transmitter signal element timing Receiver signal element timing Secondary transmitted data Secondary received data Secondary request to send Secondary clear to send Secondary received ca...

Page 182: ...30 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middle of the operation press the key indicated in step 1 The confirmed settings up to that point are k...

Page 183: ...ata buffer becomes 3 4 full and is set to True when received data buffer becomes 1 4 full CA RTS is set to False when received data buffer becomes 3 4 full and is set to True when received data buffer becomes 1 4 full No handshake 0 1 2 3 4 5 6 7 Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Ο Mode selection no Handshaking method combinations a circle indicates that the function is available Precautions Regarding...

Page 184: ...length 8 7 7 7 Parity No Odd Even No Stop bit 1 1 1 2 Baud Rate The baud rate can be selected from 1200 2400 4800 and 9600 About the Terminator Data can be received with either CR LF or LF terminator For transmission terminator you can select from CR LF LF and CR Interval In case of the talk only mode this setting specifies the interval to output data Setting range 00 00 00 0 hr 00 min 00 sec to 9...

Page 185: ...yte is output when the S command is received following reception of the ESC code 1BH For a description of the status byte format see section 10 3 However in the serial communications of the WT210 WT230 SRQ DI07 is always 1 ESC R terminator Equivalent to GP IB s remote local control function The instrument is placed in remote status and panel keys become invalid when the R command is received follo...

Page 186: ...isplay function element for each display Number of displayed digits Display update rate Integration mode Integration timer preset time Integration value Integration elapsed time Data stored in internal memory Storage interval Recalling interval Output items for plotter communication Harmonic measurement ON OFF only when equipped with the harmonic measurement option PLL source only when equipped wi...

Page 187: ...W 2 3 FUNCTION ELEMENT 1 2 3 FUNCTION ELEMENT 1 2 3 The explanation given in this section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Operate the instrument by following the thick lines in the menu below Press the ENTER key to confirm a selection or setting To leave the current menu in the middl...

Page 188: ...lling Interval 0hr 00min 00sec storage recalling ON OFF OFF D A output option Output items normal measurement items rated integration time 1 hr 00 min 00 s Comparator option Mode single determination function V1 A1 P1 PF1 Limit value refer to section 9 6 display function ON OFF OFF Data output Communication item normal measurement setting GP IB Mode addressable mode address 1 status byte 15 delimi...

Page 189: ...function is used to create a zero input condition using the internal circuit of the WT210 WT230 and setting the level at that point to zero level Zero level compensation must be performed to meet the specifications of the WT210 WT230 see chapter 16 Zero level compensation is executed when you carry out the following operations When you press the SHIFT key to illuminate the indicator above and to t...

Page 190: ... section uses WT230 as an example For the differences between the WT210 and the WT230 see section 2 2 Operation Keys and Functions Element Display Procedure Turning ON the key lock SHIFT KEY LOCK LOCAL Key lock ON The KEY LOCK indicator on the front panel illuminates From this point you can only operate the power switch or carry out the operation to turn OFF the key lock Turning OFF the key lock C...

Page 191: ...le recalling or storing is in progress execution error 19 will occur AA AA Sets the current auto range ON or OFF inquires about the current setting Syntax AA m terminator m indicates auto range ON OFF m 0 auto range OFF fixed range 1 auto range ON Query AA terminator Example AA0 Description Parameter error 12 will occur if m is set to an illegal value Auto range is not allowed while integration is...

Page 192: ...t order order Query DA terminator Example DA1 Description Parameter error 12 will occur if m is set to an illegal value DB DB Sets the function for display B inquires about the current setting Syntax DB m terminator m indicates one of the following functions in case of normal measurement m 1 voltage V 2 current A 3 power W 6 power factor PF 11 phase angle deg in case of harmonic measurement m 1 Me...

Page 193: ...m 0 CR LF EOI CR LF 1 IF LF 2 EOI CR Query DL terminator Example DL0 Description Parameter error 12 will occur if m is set to an illegal value DR DR Displays the current range Syntax DR m terminator m indicates the range m 0 cancels the range display and returns to measurement display 1 displays voltage current and shunt value of element 1 on display A B and C respectively 2 displays the shunt val...

Page 194: ... H terminator Example H0 Description Parameter error 12 will occur if m is set to an illegal value HA HA Determines whether or not to turn ON the harmonic measurement function inquires about the current setting Syntax HA m terminator m indicates whether the harmonic measurement function or normal measurement function is set m 0 Normal measurement 1 Harmonic measurement Query HA terminator Example ...

Page 195: ...op integration when integration has already been interrupted stopped execution error 45 will occur While recalling or storing is in progress execution error 19 will occur IR Resets integration Syntax IR terminator Description If an attempt is made to reset integration while integration is in progress execution error 45 will occur While recalling or storing is in progress execution error 19 will oc...

Page 196: ...MEAN MEAN in case of voltage RMS in case of current 2 DC Query MN terminator Example MN0 Description Parameter error 12 will occur if m is set to an illegal value Changing of the measurement mode is not allowed while integration is in progress execution error 13 will occur While recalling or storing is in progress execution error 19 will occur MT MT Sets the computing equation of MATH function inq...

Page 197: ... the element but when using them with the OA command set m3 1 OAD OAD Initializes D A output items inquires about the current settings Two sets of default settings are available one is for normal measurement and the other is for integration The same initialization can also be performed using a key operation Syntax OAD m terminator m indicates default no m 2 Select mode 0 Default for normal measure...

Page 198: ...hour Wh 10 Ampere hour Ah 11 Phase angle deg 12 Peak voltage value Vpk 13 Peak current value Apk 14 Computation result MATH 15 Integration time 24 Positive watt hour Wh 25 Negative watt hour Wh 26 Positive ampere hour Ah 27 Negative ampere hour Ah m3 indicates element and must be set within the following range 1 m3 4 Query OF1 terminator Example OF1 3 2 Description Parameter error 12 will occur if...

Page 199: ...nd graph 12 CGW outputs the relative harmonic content of active power as numerical value and graph 13 ALL outputs the relative harmonic content and measured value of both voltage and current in case of any other mode m1 1 V outputs measured voltage value and relative harmonic content as a numerical value 2 A outputs measured current value and relative harmonic content as a numerical value 3 W outp...

Page 200: ...unction DA1 DB2 DC3 terminator Line 5 Display element EA1 EB1 EC1 terminator Line 6 Measurement condition WR2 FL0 SC0 AG0 HD0 MT0 terminator Line 7 Measurement mode MN0 terminator Line 8 Scaling for CM0 KV1 000 KA1 000 KW1 000 terminator for CM1 WT210 KV1 1 000 KA1 1 000 KW1 1 000 terminator for CM1 WT230 KV1 1 000 KV2 1 000 KV3 1 000 KA1 1 000 KA2 1 000 KA3 1 000 KW1 1 000 KW2 1 000 KW3 1 000 ter...

Page 201: ...ay output items in case of harmonic measurement inquires about the current setting Up to four items can be set Syntax OYH m1 m2 m3 m4 m5 m6 terminator m1 indicates the output relay channel 1 m1 4 m2 indicates the output item number m2 0 no output 1 Voltage V 2 Current A 3 Power W 6 Power factor PF 16 harmonic distortion factor of voltage V THD 17 harmonic distortion factor of current A THD 19 Rela...

Page 202: ...tion EX2 17 100 mV range only when equipped with option EX2 18 1 25 V range only when equipped with option EX2 19 2 5 V range only when equipped with option EX2 20 5 V range only when equipped with option EX2 21 2 5 mA range only when equipped with option EX2 22 5 mA range WT210 only 23 10 mA range WT210 only 24 25 mA range WT210 only 25 50 mA range WT210 only 26 100 mA range WT210 only Query RA t...

Page 203: ...ed while integration is in progress execution error 13 will occur While recalling or storing is in progress execution error 19 will occur SA SA Sets the external sensor scaling value inquires about the current setting Syntax When CM0 is set SA n terminator When CM1 is set SA m n terminator m indicates element m 0 All elements Setting not allowed during inquiry 1 Element 1 2 Element 2 for WT230 mod...

Page 204: ...he storage interval inquires about the current setting Syntax SR m1 m2 m3 terminator m1 indicates the hours 0 m1 99 m2 indicates the minutes 0 m2 59 13 1 Commands m3 indicates the seconds 0 m3 59 Query SR terminator Example SR0 0 0 Description Parameter error 12 will occur if an illegal value is set If the store interval is set to 0 h 0 min 0 s the store interval is set to the same interval as the...

Page 205: ...vely Query YC terminator Example YC1 Description Parameter error 12 will occur if m is set to an illegal value YM YM Sets the mode of the comparator function inquires about the current setting Syntax YM m terminator m indicates the display mode m 0 Single mode 1 Dual mode Query YM terminator Example YM0 Description Parameter error 12 will occur if m is set to an illegal value YO YO Sets the compar...

Page 206: ...se the GP IB serial polling function ilrsp function Turn OFF automatic serial polling clear the Automatic Serial Polling check box to make the sample programs work properly Basic Form of Programming The program data structure of the WT210 WT230 is as follows Command Parameter Terminator ASCII codes are used Example DA 2 CR LF Command Parameter Terminator Command Defined by one to three uppercase a...

Page 207: ... delimit each command statement command parameter using a semicolon Note A space or a tab can either exist or not exist between a command and a parameter Query Commands A query command has a question mark attached to the end of the command The returned data in response to a query command is as follows Query Returned data DA DA1 Numeric Parameters Digits that exceed 5 digits in floating point param...

Page 208: ...13 18 IM 760401 01E 13 3 Sample Program Image ...

Page 209: ...Sub DisplayGPIBError ByVal sts As Integer ByVal msg As String Dim wrn As String Dim ers As String Dim ern As Integer If sts And TIMO Then wrn Time out Chr 13 Else wrn End If If sts And EERR Then ern iberr If ern EDVR Then ers EDVR System error ElseIf ern ECIC Then ers ECIC Function requires GPIB board to be CIC ElseIf ern ENOL Then ers ENOL No Listeners on the GPIB ElseIf ern EADR Then ers EADR GP...

Page 210: ...OR End If StartFlag 0 End Sub Private Sub Command2_Click Dim sts As Integer If StartFlag 1 Then Exit Sub End If StartFlag 1 Text1 Text START List1 Clear Dummy DoEvents sts GpibHarmonics Run Sample2 GPIB Get Harmonics Data If sts 0 Then Text1 Text END Else Text1 Text ERROR End If StartFlag 0 End Sub Private Sub Command3_Click Dim sts As Integer If StartFlag 1 Then Exit Sub End If StartFlag 1 Text1 ...

Page 211: ... End Sub Private Sub Command6_Click Dim sts As Integer If StartFlag 1 Then Exit Sub End If StartFlag 1 Text1 Text START List1 Clear List1 AddItem NOT MAKE Text1 Text END StartFlag 0 End Sub Private Sub Form_Load StartFlag 0 Clear Start Flag Dev 1 Clear device id addr 1 GPIB Address 1 Command1 Caption Sample1 GPIB Chr 13 Get Normal Data Command2 Caption Sample2 GPIB Chr 13 Get Harmonics Data Text1 ...

Page 212: ...quency Filter off Line Filter off Scaling off Averaging off msg HD0 FL0 LF0 SC0 AG0 term sts ilwrt Dev msg Len msg Send Command If sts 0 Then GoTo GPIBError End If Set function and element of display DisplayA V Element1 DisplayB A Element1 DisplayC W Element1 msg DA1 EA1 DB2 EB1 DC3 EC1 term sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If Set the measurement range msg RV7 term Voltag...

Page 213: ...l END qry msg OD term sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If Do While qrytemp END qrytemp Space 200 sts ilrd Dev qrytemp Len qrytemp If sts 0 Then GoTo GPIBError End If qrytemp Left qrytemp InStr qrytemp term 2 qry qry qrytemp If qrytemp END Then qry qry End If Loop Extract items that are separated by commas from the received data List1 AddItem Measurement CStr cnt List1 Lis...

Page 214: ...13 24 IM 760401 01E 13 5 Sample Program Output of Normal Measurement Data ...

Page 215: ...ev msg Len msg If sts 0 Then GoTo GPIBError End If Set the measurement range msg RV7 term Voltage range 150V sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If msg RA7 term Current range 5A sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If Setting related to harmonic measurement Object element 1 PLL source V1 Computation method of THD IEC msg HE1 PS1 DF0 HA1 term sts ilwrt D...

Page 216: ...en GoTo GPIBError End If List1 AddItem Measurement CStr cnt List1 ListIndex List1 ListIndex 1 Do While qrytemp END qrytemp Space 200 sts ilrd Dev qrytemp Len qrytemp If sts 0 Then GoTo GPIBError End If qrytemp Left qrytemp InStr qrytemp term 2 If qrytemp END Then Exit Do End If List1 AddItem qrytemp List1 ListIndex List1 ListIndex 1 Loop Dummy DoEvents qrytemp Space 200 List1 AddItem List1 ListInd...

Page 217: ...ata during analysis of the syntax Every query generates response data when analysis of the syntax is performed d Types of queries which generate response data during reception No query generates response data when it is received by the controller e Types of commands which have pairs of parameters No such commands 6 List of function elements which configure commands used for the device All those wh...

Page 218: ...not supported 20 Execution range of self test using TST Refer to section 14 3 15 Common Command Group 21 Structure of extended return status Refer to section 14 4 22 To find out whether each command is performed in parallel or sequentially Refer to section 14 2 6 Synchronization with the Controller or Section 14 3 23 Functions performed until a message indicating completion of the command is displ...

Page 219: ...nstrument executes commands one by one according to the order in which they are received Program message units are delimited by a For a description of the format of the program message unit refer to the explanation given further below Unit Unit Example CONFIGURE MODE RMS FILTER ON PMT PMT PMT is a terminator used to terminate each program message The following three types of terminator are availab...

Page 220: ...y must be separated by a comma Header Data Data Example 500 0E 03 RMT CONFIGURE MODE RMS RMT If a program message contains more than one query responses are made in the same order as the queries Normally each query returns only one response message unit but there are some queries which return more than one response message unit The first response message unit always responds to the first query but...

Page 221: ...ey differ in the format of their program headers They are Common command header Compound header Common Command Header Commands defined in IEEE 488 2 1992 are called common commands The header format of a common command is shown below An asterisk must always be attached to the beginning of a command Mnemonic An example of a common command CLS Compound Header Commands designed to be used only with t...

Page 222: ...per level Query An upper level query is a compound header to which a question mark is appended Execution of an upper level query allows all settings of one group to be output at once Some query groups comprising more than three hierarchical levels can output all their lower level settings Example INTEGRATE PMT INTEGRATE MODE NORMAL TIMER 0 0 0 RMT In reply to a query a response can be returned as ...

Page 223: ...essed as a decimal number Example PT setting CONFigure SCALing PT ELEMENT1 100 Voltage Current Physical value Example Voltage range CONFigure VOLTage RANge 150V Register Register value expressed as either binary octal decimal or hexadecimal Example Extended event register value STATus EESE HFE Character data Specified character string mnemonic Can be selected from Example Selecting measurement mod...

Page 224: ...sponse messages are always expressed as NR1 Character Data Character data is a specified string of character data a mnemonic It is mainly used to indicate options and is chosen from the character strings given in For interpretation rules refer to Header Interpretation Rules on page 14 6 Form Example RMS VMEan DC RMS As with a header the COMMunicate VERBose command can be used to return a response ...

Page 225: ...n updated MEASure NORMal VALue will be executed The display becomes no data and 9 91E 37 Not a number will be output CONFigure VOLTage RANGe 60V MEASure NORMal VALue PMT In this case synchronization with the time at which the update of measurement data is completed must be accomplished as shown next Using STATus CONDition query A STATus CONDition query is used to make an inquiry about the contents...

Page 226: ...sponse to STATus EESR is decoded COMMunicate WAIT 1 MEASure NORMal VALue PMT For a description of STATus FILTer1 FALL and STATus EESR refer to Using the extended event register on this page COMMunicate WAIT 1 means that communications is halted until bit 0 of the extended event register is set to 1 MEASure NORMal VALue will not be executed until bit 0 of the extended event register is set to 1 14 ...

Page 227: ...ent setting 14 19 CONFigure CURRent Queries all settings related to the current range 14 19 CONFigure CURRent AUTO Sets queries the current auto range ON OFF 14 19 CONFigure CURRent ESCaling Queries all settings related to the external sensor 14 20 CONFigure CURRent ESCaling ALL Sets the scaling constants for the external sensor for all elements at once 14 20 CONFigure CURRent ESCaling ELEMent x S...

Page 228: ...r arithmetic operations 14 26 MATH AVERage Sets queries the average active power computation during integration 14 26 MATH CFACtor Sets queries the computing equation of the crest factor 14 26 MATH TYPE Sets queries the computing equation 14 27 MEASure Group MEASure Queries all settings related to measurement computation data 14 29 MEASure HARMonics Queries all settings related to harmonic measure...

Page 229: ...ueries all settings related to relay output items in case of harmonic measurement 14 37 RELay HCHannel x FUNCtion Sets queries function of the relay output item in case of harmonic measurement 14 38 RELay HCHannel x THReshold Sets queries the threshold level for the relay output item 14 38 RELay MODE Sets queries the mode of the comparator function 14 38 RELay NCHannel x Queries all settings relat...

Page 230: ...14 42 ESR Sets queries the value of the standard event register and clears it 14 42 IDN Queries the instrument model 14 43 OPC This command is not supported by this instrument 14 43 OPC This command is not supported by this instrument and is always 1 14 43 OPT Queries installed options 14 43 PSC Sets queries whether or not to clear some registers at power ON 14 43 RST Initializes the setup paramet...

Page 231: ...TPUT IRTIME AOUTPUT IRTIME 1 0 0 AOUTput PRESet Function Initializes the output items for D A output Syntax AOUTput PREset NORMal INTEGrate NORMal default for normal measurement INTEGrate default for integration Example AOUTPUT PRESET NORMAL Description Refer to section 9 3 for a description of default D A output items for normal measurement and integration 14 3 2 AOUTput Group The commands in the...

Page 232: ...ON or local mode OFF Syntax COMMunicate REMote Boolean COMMunicate REMote Example COMMUNICATE REMOTE ON COMMUNICATE REMOTE COMMUNICATE REMOTE 1 Description This command is used for the serial interface An interface message is available for the GP IB interface COMMunicate STATus Function Queries the status of a specified circuit Syntax COMMunicate STATus Example COMMUNICATE STATUS COMMUNICATE STATU...

Page 233: ...OMMUNICATE VERBOSE COMMUNICATE VERBOSE 1 COMMunicate WAIT Function Waits until one of the specified extended event occurs Syntax COMMunicate WAIT Register Register 0 to 65535 For a description of the extended event register refer to page 14 47 Example COMMUNICATE WAIT 65535 Description For a description of synchronization using COMMunicate WAIT refer to page 14 9 COMMunicate WAIT Function Generate...

Page 234: ...external sensor scaling values are only vald if equipped with the external sensor option EX1 or EX2 CONFigure WIRing Space P1W3 P3W3 P3W4 V3A3 MODE Space RMS VMEan DC VOLTage RANGe Space AUTO Space OFF ON NRf CURRent RANGe Space EXTernal AUTO Space OFF ON NRf ESCaling ALL Space NRf ELEMent x Space NRf FILTer Space OFF ON NRf LFILter Space OFF ON NRf SCALing STATe Space OFF ON NRf NRf PT ALL Space ...

Page 235: ...VERaging STATe Function Sets averaging ON OFF or queries the current status Syntax CONFigure AVERaging STATe Boolean CONFigure AVERaging STATe 14 3 Commands Example CONFIGURE AVERAGING STATE OFF CONFIGURE AVERAGING STATE CONFIGURE AVERAGING STATE 0 CONFigure AVERaging TYPE Function Sets the averaging type and coefficient queries the current setting Syntax CONFigure AVERaging TYPE LINear EXPonent N...

Page 236: ...Syntax CONFigure CURRent RANGe current EXTernal voltage CONFigure CURRent RANGe When the crest factor is set to 3 current 500mA to 20A 0 5 1 2 5 10 20A The following settings available only on WT210 5mA to 200mA 5m 10m 20m 50m 100m 200mA voltage 50mV to 200mV 50 100 200mV for EX2 option 2 5V to 10V 2 5 5 10V for EX1 option When the crest factor is set to 6 Current 250 mA to 10 A 0 25 0 5 1 2 5 5 o...

Page 237: ... the current setting Syntax CONFigure SCALing PT CT SFACtor ELEMent x NRf CONFigure SCALing PT CT SFACtor ELEMent x x 1 WT210 single phase model 1 3 WT230 three phase three wire model 1 to 3 WT230 three phase four wire model NRf 0 001 to 9999 Example CONFIGURE SCALING PT ELEMENT1 1 000 CONFIGURE SCALING PT ELEMENT1 CONFIGURE SCALING PT ELEMENT1 1 000E 00 Description The setting values are rounded ...

Page 238: ... 1 RESOLUTION HIGH CONFigure WIRing Function Sets the wiring method queries the current setting Syntax CONFigure WIRing P1W2 P1W3 P3W3 P3W4 V3A3 CONFigure WIRing Example CONFIGURE WIRING P1W3 CONFIGURE WIRING CONFIGURE WIRING P1W3 Description The selections stand for the following P1W3 Single phase three wires only for WT230 P3W3 Three phase three wires only for WT230 P3W4 Three phase four wires o...

Page 239: ...lay function V A W VA VAR PF DEGRee VHZ AHZ WH WHP WHM AH AHP AHM MATH VPK APK TIME In case of harmonic measurement display function V A W PF VHZ AHZ VTHD ATHD VCON ACON WCON VDEG ADEG ORDer Example DISPLAY1 FUNCTION V DISPLAY1 FUNCTION DISPLAY1 FUNCTION V Description For the meanings of the symbols of functions see Note on page 14 14 DISPlay x MODE Function Sets the contents of the display querie...

Page 240: ...n display B queries the current setting Syntax HARMonics DISPlay ORDer NRf HARMonics DISPlay ORDer NRf 1 to 50 Example HARMONICS DISPLAY ORDER 1 HARMONICS DISPLAY ORDER HARMONICS DISPLAY ORDER 1 HARMonics ELEMent Function Sets the element for harmonic measurement queries the current setting Syntax HARMonics ELEMent NRf 14 3 Commands HARMonics ELEMent NRf 1 WT210 single phase model 1 3 WT230 three ...

Page 241: ...s the integrated values Syntax INTEGrate RESet Example INTEGRATE RESET INTEGrate STARt Function Starts integration Syntax INTEGrate STARt Example INTEGRATE START HARMonics THD Function Sets the computation method for harmonic distortion THD for harmonic measurement queries the current setting Syntax HARMonics THD IEC CSA HARMonics THD Example HARMONICS THD IEC HARMONICS THD HARMONICS THD IEC 14 3 ...

Page 242: ...H ARITHMETIC MATH ARITHMETIC ADD Description If MATH TYPE is not set to ARIThmetic this command will be meaningless The computing equation selections are as follows ADD display A display B SUB display A display B MUL display A display B DIV display A display B DIVA display A display B 2 DIVB display A 2 display B MATH AVERage Function Sets queries the average active power computation Syntax MATH A...

Page 243: ...ing equation Syntax MATH TYPE EFFiciency CFACtor ARIThmetic AVERage MATH TYPE Example MATH TYPE CFACTOR MATH TYPE MATH TYPE CFACTOR Description The equation method selections are as follows EFFiciency Efficiency valid only for WT230 CFACtor Crest factor ARIThmetic Four arithmetic operations AVERage Average active power during integration 14 3 Commands ...

Page 244: ...commands Setting the output items for measurement computation data is only valid in the communication mode MEASure NORMal VALue ITEM BINary BINary PRESet Space NORMal INTEGrate CLEar ALL Space OFF ON NRf ELEMent x Space OFF ON NRf SIGMa Space OFF ON NRf TIME Space OFF ON NRf HARMonics VALue ITEM PRESet Space VPATtern ALL CLEar Space OFF ON NRf SYNChronize Normal measurement function Harmonic measu...

Page 245: ...ELEMENT3 0 SIGMA 0 MEASURE NORMAL ITEM TIME 0 MATH 0 MEASURE HARMONICS ITEM SYNCHRONIZE 1 VTHD 1 V 1 VCON 1 ATHD 0 A 0 ACON 0 PF 0 W 0 WCON 0 VDEG 0 ADEG 0 MEASURE HEADER 0 14 3 Commands HEADer Space OFF ON NRf MEASure HARMonics Function Queries all settings related to harmonic measurement data Syntax MEASure HARMonics Example MEASURE HARMONICS MEASURE HARMONICS ITEM SYNCHRONIZE 1 VTHD 1 V 1 VCON ...

Page 246: ...ntax MEASure NORMal Example Example of WT230 three phase four wire model MEASURE NORMAL MEASURE NORMAL ITEM V ELEMENT1 1 ELEMENT2 1 ELEMENT3 1 SIGMA 1 MEASURE NORMAL ITEM A ELEMENT1 1 ELEMENT2 1 ELEMENT3 1 SIGMA 1 MEASURE NORMAL ITEM W ELEMENT1 1 ELEMENT2 1 ELEMENT3 1 SIGMA 1 MEASURE NORMAL ITEM VA ELEMENT1 0 ELEMENT2 0 ELEMENT3 0 SIGMA 0 MEASURE NORMAL ITEM VAR ELEMENT1 0 ELEMENT2 0 ELEMENT3 0 SI...

Page 247: ...once Syntax MEASure NORMal ITEM normal measurement function ALL Boolean Example MEASURE NORMAL ITEM V ALL ON MEASure NORMal ITEM normal measurement function ELEMent x Function Sets the communication output concerning each element ON OFF queries the current setting Syntax MEASure NORMal ITEM normal measurement function ELEMent x Boolean MEASure NORMal ITEM normal measurement function ELEMent x 14 3...

Page 248: ...rs minutes seconds in the NR1 format Example 999 59 59 Only one of the six parameters VHZ1 VHZ2 VHZ3 AHZ1 AHZ2 or AHZ3 can be measured for frequency Data that is not measured is set to no data 9 91E 37 VHZΣ AHZΣ VPKΣ and APKΣ always output no data 9 91E 37 Output Format of Normal Measurement Data The communication output is set ON by any of the commands starting with MEASure NORMal ITEM and the no...

Page 249: ... Data Format of Harmonic Measurement All data will be output in the NR3 format mantissa max 5 digits exponent 2 digits Output Format of Harmonic Measurement The communication output is set ON by any of the commands starting with MEASure HARMonics ITEM and the harmonic measurement data or frequency of PLL source SYNChronize are output according to the following order of priority Besides in case of ...

Page 250: ... 01E 00 0 62E 00 0 00E 00 0 41E 00 0 00E 00 0 30E 00 0 00E 00 0 22E 00 0 00E 00 0 17E 00 0 00E 00 0 14E 00 0 00E 00 0 12E 00 0 00E 00 0 09E 00 0 00E 00 0 08E 00 0 00E 00 0 07E 00 0 01E 00 0 06E 00 0 00E 00 0 05E 00 0 00E 00 0 04E 00 0 00E 00 0 05E 00 0 00E 00 0 03E 00 0 00E 00 0 03E 00 0 01E 00 0 03E 00 0 00E 00 0 03E 00 0 00E 00 0 02E 00 0 00E 00 0 02E 00 0 00E 00 0 02E 00 0 00E 00 0 06E 00 11 09...

Page 251: ...000 Normal 0001 Overrange oL 0010 Voltage peak over 0011 Current peak over 0100 Power factor error PFErr 0101 Phase angle error dEGEr 0110 Frequency error ErrLo 0111 Frequency error ErrHi 1000 Computation overflow oF 1001 PLL error FreqEr 1010 No data ASCII conversion information b7 b6 b5 b4 b3 b2 b1 b0 b7 to b4 Prefix unit 0000 None E 0 0001 m E 3 0010 k E 3 0011 M E 6 b3 to b0 Decimal point posi...

Page 252: ...alling interval is set to the display update rate as when the data was stored RECall PANel Function Retrieves the setup parameters file Syntax RECall PANel NRf NRf 1 to 4 file number Example RECALL PANEL 1 RECall STATe Function Turns recalling ON OFF queries the current setting Syntax RECall STATe Boolean RECall STATe Example RECALL STATE ON RECALL STATE RECALL STATE 1 14 3 10 RECall Group The com...

Page 253: ...ting to the comparator function Syntax RELay Example RELAY RELAY STATE 0 MODE SINGLE NCHANNEL1 FUNCTION V 1 THRESHOLD 600 0E 00 RELAY NCHANNEL2 FUNCTION A 1 THRESHOLD 20 00E 00 RELAY NCHANNEL3 FUNCTION W 1 THRESHOLD 1 200E 03 RELAY NCHANNEL4 FUNCTION PF 1 THRESHOLD 1 000E 00 RELAY HCHANNEL1 FUNCTION V 1 1 THRESHOLD 600 0E 00 RELAY HCHANNEL2 FUNCTION A 1 1 THRESHOLD 20 00E 00 RELAY HCHANNEL3 FUNCTI...

Page 254: ...ator function queries the current setting Syntax RELay MODE SINGle DUAL RELay MODE Example RELAY MODE DUAL RELAY MODE RELAY MODE DUAL RELay NCHannel x Function Queries all settings related to the relay output items in case of normal measurement Syntax RELay NCHannel x x 1 to 4 Example RELAY NCHANNEL2 RELAY NCHANNEL2 FUNCTION A 1 THRESHOLD 20 00E 00 RELay NCHannel x FUNCtion Function Sets the funct...

Page 255: ...used SAMPle HOLD Space OFF ON NRf RATE Space time 14 3 Commands SAMPle Function Queries all settings related to sampling Syntax SAMPle Example SAMPLE SAMPLE HOLD 0 SAMPle HOLD Function Sets to hold the output of data display communication queries the current setting Syntax SAMPle HOLD Boolean SAMPle HOLD Example SAMPLE HOLD ON SAMPLE HOLD SAMPLE HOLD 1 SAMPle RATE Function Sets the display update ...

Page 256: ...ls on the extended event register STATus EESR Function Queries the contents of the extended event register and clears it Syntax STATus EESR Example STATUS EESR 1 Description Refer to Section 14 4 for details on the extended event register STATus ERRor Function Queries the occurred error code and message Syntax STATus ERRor Example STATUS ERROR 113 Undefined header STATus FILTer x Function Sets the...

Page 257: ...menus of MEMORY StorE or MEMORY PnLSt STORe STATe Space OFF ON NRf INTerval Space NRf NRf NRf PANel Space NRf Character string STORe STATe Function Sets store ON OFF queries the current setting Syntax STORe STATe Boolean STORe STATe Example STORE STATE ON STORE STATE STORE STATE 1 14 3 Commands STORe Function Queries all settings related to storing data Syntax STORe Example STORE STORE STATE 0 INT...

Page 258: ...set to 1 even if a query error occurs Default is ESE 0 i e all bits are disabled The standard event enable register will be cleared when an inquiry is made using ESE For details referring the standard event enable register refer to page 14 45 ESR Function Queries the value of the standard event register and clears it at the same time Syntax ESR Example ESR 32 Description Each bit is expressed as a...

Page 259: ...f SRE NRf 0 to 255 Example SRE 239 SRE 175 since the bit 6 MSS setting is ignored Description Each bit is expressed as a decimal number For example if SRE 239 is set the service request enable register will be set to 11101111 This means that bit 4 of the service request enable register is disabled so that bit 4 MAV of the status byte register will not be set to 1 even if the output queue is not em...

Page 260: ... 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Condition register Transit filter Extended event register 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Extended event enable register 7 6 5 4 3 2 1 0 Standard event register 7 6 5 4 3 2 1 0 Standard event enable register OR OR 7 6 ESBMAVEES EAV 1 0 Status byte MSS RQS Output queue Error queue Occurrence of a service request ...

Page 261: ...vent enable register to 1 or 0 and the ESR query is used to check whether bits in that register are set to 1 or 0 For details of these commands refer to section 14 3 14 4 2 Status Byte Overview of Status Byte 7 6 ESB MAV EES EAV 1 0 RQS MSS Bits 0 1 and 7 Not used always 0 Bit 2 EAV Error Available Set to 1 when the error queue is not empty i e when an error occurs For details refer to page 14 44 ...

Page 262: ...atus byte are cleared except bit 4 MAV since the output queue cannot be emptied by the CLS command However the output queue will also be cleared if the CLS command is received just after a program message terminator 14 4 3 Standard Event Register Overview of the Standard Event Register URQ 6 PON 7 5 4 3 2 1 0 CME EXE DDE QYE RQC OPC Bit 7 PON Power ON Bit 7 PON Power ON Set to 1 when power is turn...

Page 263: ...each bit of the condition register is as follows Bit 0 UPD Updating Set to 1 during updating of measurement data Bit 1 ITG Integrate busy Set to 1 during integration See figure below Bit 2 ITM Integrate timer busy Set to 1 during the integration timer is being operated See figure on the next page Bit 3 OVRS results overflow Set to 1 when the integration results of overflow Display shows oF Bit 4 F...

Page 264: ...ueue until it is read out The example below shows that data is stored record by record in the output queue and is read out oldest item first newest item last The output queue is emptied in the following cases in addition to when read out is performed When a new message is received from the controller When dead lock occurs page 14 5 When a device clear command DCL or SDC is received When power is t...

Page 265: ...sual Basic Ver5 0 Professional Edition or later GP IB board AT GPIB TNT IEEE 488 2 by National Instruments Settings on Visual Basic Standard modules used Niglobal bas Vbib 32 bas WT210 WT230 Settings GP IB address The sample programs given in this chapter use a GP IB address of 1 for the WT210 WT230 Set the GP IB address to 1 according to the procedures described in section 10 5 ...

Page 266: ...14 50 IM 760401 01E 14 6 Sample Program Image ...

Page 267: ...BError sts ilsic InitGpib 1 End Function Private Sub DisplayGPIBError ByVal sts As Integer ByVal msg As String Dim wrn As String Dim ers As String Dim ern As Integer If sts And TIMO Then wrn Time out Chr 13 Else wrn End If If sts And EERR Then ern iberr If ern EDVR Then ers EDVR System error ElseIf ern ECIC Then ers ECIC Function requires GPIB board to be CIC ElseIf ern ENOL Then ers ENOL No Liste...

Page 268: ...xt END Else Text1 Text ERROR End If StartFlag 0 End Sub Private Sub Command2_Click Dim sts As Integer If StartFlag 1 Then Exit Sub End If StartFlag 1 Text1 Text START List1 Clear Dummy DoEvents sts GpibHarmonics Run Sample2 GPIB Get Harmonics Data If sts 0 Then Text1 Text END Else Text1 Text ERROR End If StartFlag 0 End Sub Private Sub Command3_Click Dim sts As Integer If StartFlag 1 Then Exit Sub...

Page 269: ...g 0 End Sub Private Sub Command6_Click Dim sts As Integer If StartFlag 1 Then Exit Sub End If StartFlag 1 Text1 Text START List1 Clear List1 AddItem NOT MAKE Text1 Text END StartFlag 0 End Sub Private Sub Form_Load StartFlag 0 Clear Start Flag Dev 1 Clear device id addr 1 GPIB Address 1 Command1 Caption Sample1 GPIB Chr 13 Get Normal Data Command2 Caption Sample2 GPIB Chr 13 Get Harmonics Data Tex...

Page 270: ...wrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If msg MODE RMS term Measurment Mode RMS sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If msg FILTER OFF term Frequency Filter off sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If msg LFILTER OFF term Line Filter off sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If msg SCALING OFF AVERAGING OFF term Scaling...

Page 271: ...mpletion of the data updating msg COMMUNICATE WAIT 1 term sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If Read out the measurement data msg MEASURE NORMAL VALUE term sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If sts ilrd Dev qry Len qry If sts 0 Then GoTo GPIBError End If Extract items that are separated by commas from the received data List1 AddItem Measurement CStr ...

Page 272: ...14 56 IM 760401 01E 14 8 Sample Program Output of Normal Measurement Data ...

Page 273: ...msg Len msg If sts 0 Then GoTo GPIBError End If Set the measurement range msg VOLTAGE RANGE 150V term Voltage range 150V sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If msg CURRENT RANGE 5A term Current range 5A sts ilwrt Dev msg Len msg If sts 0 Then GoTo GPIBError End If Setting related to harmonics analize Object element 1 PLL source V1 Computation method of THD IEC msg HARMONICS ...

Page 274: ...ed by commas from the received data List1 AddItem Measurement CStr cnt List1 ListIndex List1 ListIndex 1 For item 1 To 53 length Len qry comma InStr qry If comma 0 Then comma InStr qry term Query item Left qry comma 1 If item 1 Then List1 AddItem FREQ V1 Query item ElseIf item 2 Then List1 AddItem A1 THD Query item ElseIf item 3 Then List1 AddItem A1 Total Query item ElseIf item 4 Then List1 AddIt...

Page 275: ...14 59 IM 760401 01E Communication Commands 2 System of Commands Complying to the IEEE 488 2 1992 Standard 14 14 9 Sample Program Output of Harmonic Measurement Data ...

Page 276: ... 6F 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 11...

Page 277: ...umeric data error Mantissa must be entered before the numeric value in NRf 14 7 format 123 Exponent too large Use a smaller exponent in NR3 format 14 7 14 3 124 Too many digits Limit the number of digits to 255 or less 14 7 14 3 128 Numeric data not allowed Enter in a format other than NRf format 14 7 14 3 131 Invalid suffix Check the units for Voltage and Current 14 8 134 Suffix too long Check th...

Page 278: ...und Does not conform to the macro definition specified in IEEE488 2 Error in communication Query 400 to 499 Code Message Action Reference 410 Query INTERRUPTED Check transmission reception order 14 4 420 Query UNTERMINATED Check transmission reception order 14 4 430 Query DEADLOCKED Limit the length of the program message including PMT to 14 5 1024 bytes or less 440 Query UNTERMINATED after Do not...

Page 279: ...AnGE and press the ENTER key Then let the instrument warm up for at least 30 minutes Press the or key and the display will change to Ein in case of the external input option dA in case of the D A option or End The rAnGE mode is for adjustments of voltages or currents while the dA mode is for adjustments of the D A output This instrument has no need for adjustment of power Preparing the AC voltage ...

Page 280: ...o stabilize Even in stable condition the value fluctuates up to approximately 2 digits 5 Press the ENTER key The adjustment value is confirmed Display B shows the next voltage range Display A CAL Display B V Display C Measured value The measured value is displayed using 5 digits 6 Set the output voltage of the standard according to the voltage range shown on display B and output the signal 7 Repea...

Page 281: ...t current of the generator so that the standard power meter reads 0 5000 A 4 Wait for the measured value on display C to stabilize Even in stable condition the value fluctuates up to approximately 1 digit 5 Press the ENTER key The adjustment value is confirmed Display B shows the next current range Display A CAL Display B A Display C Measured value The measured value is displayed using 5 digits 6 ...

Page 282: ...ustments When you press the RESET key instead of the SHIFT key the carried out adjustments will become invalid Adjusting the D A Output Preparations 1 Connect the D A output terminal pin corresponding to channel 1 of the external I O connector to the H terminal of the DMM and the COM terminal pin No 24 to the L terminal For the relationship between the D A output terminals and the D A output chann...

Page 283: ...responds to the ENTER key CAL2 Enters external sensor input range adjustment mode EX0 No external sensor input option EX1 Option EX1 2 5 V 5 V and 10 V ranges EX2 Option EX2 50 mV 100 mV and 200 mV ranges CR9 EX2 Switch to 200 mV range CR10 EX1 Switch to 10 V range CAN Exits range adjustment mode discarding the adjustments Corresponds to the RESET key END Exits range adjustment mode keeping the ad...

Page 284: ...mmended Yokogawa WT2000 2ch Synchronizer recommended Yokogawa FG120 Calibration of DC Voltage Current and Power Wiring Connect the DC voltage and DC current standard as follows In case of the WT230 voltages are connected parallel and currents in series DC voltage standard H L DC Amp H L V C EUT V C V C EUT DC voltage standard H L EUT Equipment under test External sensor input equipped with option ...

Page 285: ...es with the current range set to 5 A Of course testing can be carried out using other combinations as well 1 Set the voltage range and current range of the WT210 WT230 to the range to be calibrated 2 Set the output voltage of the DC voltage standard to the rated range of the WT210 WT230 3 Set the output current of the DC current standard to the rated range of the WT210 WT230 The voltage current an...

Page 286: ...age standard V C EUT V C V C V A Digital power meter Synchronizer EUT EUT Equipment under test Direct input External sensor input equipped with option EX1 Change as follows for wiring currents only AC voltage standard H L EXT EXT EXT Synchronizer EUT External sensor input equipped with option EX2 Change as follows for wiring currents only AC voltage standard H L Synchronizer EXT EXT EXT 15 2 Calib...

Page 287: ...he power indicated on the standard power meter shows the rated value The power value displayed on the WT210 WT230 at this point is the calibration value when power factor 1 Calibration of power when the power factor 0 5 Shift the phase of the current signal channel of the phase shifter so that the power indicated on the standard power meter shows zero The power value displayed on the WT210 WT230 a...

Page 288: ...ng to each channel to the DMM one by one and repeat steps 2 to 6 Check the calibration value for all channels 8 Turn OFF the output of the voltage standard Verifying the Comparator Output Function Preparation 1 Connect the voltage standard to the voltage terminal of this instrument 2 Set the range of this instrument to 15 V 3 Set the comparator output to V1 for each channel 4 Set the comparator se...

Page 289: ...nt is to be performed see section 7 2 and confirm elements 1 2 and 3 on display B 6 If required change the current signal channel s setting of the synchronizer and the frequency of the current standard and verify another number 7 Turn the output of the voltage and current standard OFF Calibrating Voltages 1 Set the voltage siganal channel of the synchronizer to 900 Hz 15 times current signal chann...

Page 290: ...hen press the CURRENT key again 4 Connect the output terminal of the voltage standard either AC or DC to the voltage input terminal of this instrument and connect the current standard to the current input terminal 5 Set the output voltage of the voltage standard to 600 V and output this voltage 6 Verify that the measured voltage on the WT210 WT230 shows bars and changes to 600 V few seconds later ...

Page 291: ...3 5 Has the fuse blown 15 5 Displayed data is odd Is there a possibility of noise 3 2 Are measurement leads connected correctly 3 3 to 3 9 Is the setting for the measured sync source suitable in this case 4 2 Is the input filter ON or OFF 4 3 Are the ambient temperature and humidity within the allowed range 16 10 Keys do not function properly Is the REMOTE indicator ON 10 2 Is the KEY LOCK indicat...

Page 292: ... the internal Chapter 8 memory or select the proper file to be stored 33 No space to store data in the internal memory 8 1 41 Attempted to start integration while there is an overflow Reset integration 6 3 condition Attempted to start integration after elapsed integration time has reached its preset value 42 Attempted to start integration while integration is in 6 4 progress 43 Measurement stopped...

Page 293: ... communications failure Service is required 75 Internal DSP error Service is required 78 Backup data failure in setup parameters 79 ROM checksum error Service is required 80 RAM read write check error Service is required 81 RAM failure on the harmonics measure board Service is required for models with the HRM option 84 DSP sample clock failure Service is required 90 Incorrect board combination Ser...

Page 294: ...wing specifications 100V 200V Common Maximum rated voltage 250 V Maximum rate curren 1 A Type Time lag Approved standard UL VDE Parts number A1347EF Replacing Procedure Replace the fuse as follows 1 Turn the power switch OFF 2 Unplug the power cord from the power connector 3 Place the tip of a flat blade screwdriver in to the slot of the fuse holder and move the screwdriver in the direction of the...

Page 295: ...ement parts Parts Name Specifications and Recommended Replacement Period Current input relay WT210 only This is the relay used to switch the current input circuit The specifications of the relay are as follows Electric switching life Approx 50 000 times at rated capacity Mechanical life Approx 1 000 000 times Comparator function relay This relay operates in the comparator mode It is provided only ...

Page 296: ...en the crest factor is set to 6 0 25 A 0 5 A 1 A 2 5 A 5 A and 10 A ranges Input resistance Approx 6 mΩ 10 mΩ max input inductance Approx 0 1 µH WT210 when the crest factor is set to 3 5 mA 10 mA 20 mA 50 mA 100 mA and 200 mA ranges when the crest factor is set to 6 2 5 mA 5 mA 10 mA 25 mA 50 mA and 100 mA ranges Input resistance Approx 500 mΩ input inductance Approx 0 1 µH External sensor input W...

Page 297: ...ss than or equal to 5 times the rated range Continuous maximum 600 Vrms when using the output connector protection cover CAT II common mode voltage 400 Vrms when the output connector protection cover is removed CAT II during 50 60 Hz input Influence from common When 600 Vrms is applied between the input terminal and case with the voltage input terminals mode voltage shorted current input terminals...

Page 298: ... f 10 kHz 0 07 f of reading 0 3 of range 10 kHz f 100 kHz 0 5 of reading 0 5 of range 0 04 f 10 of reading The unit of f in the read error equation is kHz Add 10 µA to the DC accuracy of current Effective input range 1 to 130 with respect to the rated range of voltage or current Except add the reading error 0 5 for the range of 110 to 130 of the rated range Lower limit of measurement frequency Dis...

Page 299: ...en 0 PF 1 φ phase angle of the voltage and current Add the power reading tanφ influence when PF 0 Effect when the line filter 45 to 66 Hz Add 0 3 of reading Less than 45 Hz Add 1 of reading is turned ON Temperature coefficient Same as the temperature coefficient for voltage and current Accuracy 12 months Add reading error of the accuracy at 3 months after calibration 0 5 after calibration Accuracy...

Page 300: ... the rectified mean switching value calibrated to the RMS value of the voltage and the true RMS value of the current DC simple average of voltage and current Measurement Select voltage current or the entire period of the display update rate for the signal used to achieve synchronization source synchronization during measurement Line filter Select OFF or ON cutoff frequency of 500 Hz Peak measureme...

Page 301: ... ΣVA VA1 VA3 Σvar var1 var3 VAi 2 Wi2 cos 1 Wi VAi degi cos 1 ΣW ΣVA Σdeg 3 3 3 Three phase four wire i 1 2 3 Wi VAi Vi Ai vari VAi 2 Wi2 ΣW W1 W3 ΣVA VA1 VA2 VA3 Σvar var1 var3 Three voltage three current i 1 2 3 Wi W2 has no physical meaning VAi Vi Ai vari VAi 2 Wi2 Note The WT210 WT230 computes apparent power VA reactive power var power factor PF and phase angle deg from voltage current and act...

Page 302: ...ic operations possible A B A B A B A B A2 B and A B2 Average active power Computes the average active power within the integrated period during integration Integration Item Specifications Mode Select manual integration mode standard integration mode or repetitive integration mode Timer Automatically stop integration by setting a timer Selectable range 0 hours 00 minutes 00 seconds to 10000 hours 0...

Page 303: ...r the peak value exceeds approximately 300 Approx 600 if the crest factor is set to 6 of the rated range Step down Range down When the measured value becomes less than 30 of the rated range and the peak value is less than 300 Less than or equal to 600 if the crest factor is set to 6 of the subordinate range Display Item Specifications Display type 7 segment LED Simultaneous display 3 items Display...

Page 304: ...ts is 5 digits is 4 V A W VA var 99999 9999 PF 1 0000 to 1 0000 1 000 to 1 000 deg G180 0 to d180 0 G180 0 to d180 0 VHz AHz 99999 9999 Wh Wh Ah Ah When the unit is MWh or MAh 999999 999999 99999 for negative watt hour and ampere hour When the unit is other than MWh or MAh 99999 99999 TIME See Note on page 6 8 Efficiency 0 00 to 999 99 0 00 to 999 99 WT230 only Crest factor 9999 9999 Four arithmet...

Page 305: ...00 V range or 20 A range 300 V range or 10 A range if the crest factor is set to 6 When the measured value exceeds 140 of the rated range For other ranges When the measured value exceeds 200 of the rated range Hold Holds the displayed value Single update Updates the displayed value once each time the TRIG key is pressed during Hold MAX hold Holds the maximum displayed value of V A W VA var voltage...

Page 306: ...ems and output voltage D A output voltage see page 9 8 Output current 1 mA Number of output channels 4 outputs for products with the DA4 or CMP option 12 outputs for products with the DA12 option Output items Set for each channel Accuracy accuracy of each measurement item 0 2 of FS Update rate Same as the display update rate Temperature coefficient 0 05 C of FS 16 6 Comparator Output CMP Option It...

Page 307: ...ion commands other than those of the IEEE St d 488 2 protocol Code ISO ASCII code Address 0 to 30 Clear remote mode Remote mode can be cleared by pressing LOCAL except during Local Lockout 16 9 Serial RS 232 C Interface Standard on C2 C2 Option Item Specifications Connector type D Sub 25 pin plug Electrical specifications Conforms to EIA 232 RS 232 Connection Point to point Transmission mode Full ...

Page 308: ...put terminals and case Between current input terminals collectively and output terminals collectively Between all voltage input terminals and all current input terminals Between all voltage input terminals of input elements Between all current input terminals of input elements Between all voltage input terminals and power supply plug Between all current input terminals and power supply plug 1500 V...

Page 309: ...e as the cable condition for emission above 1 Applies to products with CE marks For all other products contact your nearest YOKOGAWA dealer 2 The Overvoltage Category is a value used to define the transient overvoltage condition and includes the impulse withstand voltage regulation Overvoltage Category II Applies to equipment supplied with electricity from fixed installations like a distribution b...

Page 310: ...0 482 6 460 482 6 463 88 76 2 5 9 88 76 2 5 9 20 11 6 11 6 7 1 7 1 73 23 356 359 1 1 1 1 1 1 1 1 0 2 0 2 0 2 0 2 0 0 3 0 0 3 0 0 3 0 0 3 Unit mm Rear Protruding from rack Protruding from rack Protruding from rack Protruding from rack JIS rack mount EIA rack mount Unless other wise specified tolerance is 3 However tolerance is 0 3mm when below 10mm ...

Page 311: ... 6 17 6 7 1 7 1 57 2 132 17 149 100 327 28 5 23 34 1 1 1 1 1 1 0 2 0 2 0 2 0 2 0 0 3 0 0 3 0 0 3 0 0 3 1 1 Unless other wise specified tolerance is 3 However tolerance is 0 3mm when below 10mm Protruding from rack Protruding from rack Protruding from rack Protruding from rack EIA rack mount JIS rack mount Rear Unit mm 16 11 Dimensional Drawings ...

Page 312: ... section 10 6 DC 4 1 dead lock 14 5 deg 5 4 digital characters 1 6 digital numbers 1 6 dimensional drawings 16 15 display function of integrator values 6 3 display functions 1 3 DISPlay group 14 22 display hold harmonic 7 2 display range 16 9 display resolution during integration 6 3 display update 4 32 display update rate harmonic 7 2 Symbols ESC C 11 8 ESC L 11 8 ESC R 11 8 ESC S 11 8 1P2W 3 11 ...

Page 313: ... input impedance 16 1 input terminal connection to 3 6 installation condition 3 2 installation position 3 2 instantaneous maximum allowable input 1 period 16 1 instantaneous maximum allowable input 3 5 instantaneous maximum allowable input for 1 s 16 2 instrument number iv INTEGrate group 14 25 integrated value 6 7 integration 6 1 integration busy 10 4 integration end 10 4 integration hold 6 1 int...

Page 314: ...recalling 8 4 8 6 recalling interval 8 4 recommended replacement parts 15 17 register 14 8 registers 14 45 RELay group 14 37 relay output 9 9 remote control 9 3 remote control function 1 5 remote mode 10 3 repeat integration 6 2 reset 6 8 response data 14 4 response header 14 4 response messages 14 4 retrieving data 8 4 RMS 4 1 RMT 14 4 RS 232 standard 11 4 S safety precautions vi 3 1 safety stand...

Page 315: ...o level compensation 1 5 zero level compensation 12 4 Commands before IEEE 488 2 AA AA 13 1 AC AC 13 1 AG AG 13 1 AT AT 13 1 AV AV 13 1 CF CF 13 1 CM CM 13 2 DA DA 13 2 DB DB 13 2 DC DC 13 2 DF DF 13 3 DL DL 13 3 DR DR 13 3 DS DS 13 3 DY DY 13 3 EA EA 13 3 EB EB 13 4 EC EC 13 4 E ST interface message GET 13 4 FL FL 13 4 H H 13 4 HA HA 13 4 HD HD 13 4 HE HE 13 4 IC IC 13 5 IM IM 13 5 IP 13 5 IR 13 ...

Page 316: ...ics SYNChronize 14 25 HARMonics THD 14 25 HARMonics 14 24 HARMonics STATe 14 24 INTEGrate MODE 14 25 INTEGrate RESet 14 25 INTEGrate STARt 14 25 INTEGrate STOP 14 25 INTEGrate TIMer 14 25 INTEGrate 14 25 MATH ARIThmetic 14 26 MATH AVERage 14 26 MATH CFACtor 14 26 MATH TYPE 14 27 MATH 14 26 MEASure HARMonics BINary 14 29 MEASure HARMonics ITEM SYNChronize 14 30 MEASure HARMonics ITEM PRESet 14 29 M...

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Summary of Contents for WT210

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YOKOGAWA WT210, User Manual, Page: 70 / 316

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Summary of Contents for WT210

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