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XITRON XT2640, Operating Manual

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XT2640 Operating Manual 

13 July 2016 

Page 169 of 187 

 

Total Scaling errors = ±0.032645% of reading 

Floor Errors: 

Base Floor = 450µV 
DC Floor = (0V/230V)*1mV = 0 

AC floor = (100µV/230V) at MAINS = 0.43µV (can be ignored) 

Common‐Mode = if not 3ø3w(2ch) wiring = none 
Common‐Mode = if 3ø3w(2ch) wiring = 1µV*(230V/√3)*50Hz = 6.6mV at (30+90)° = ±3.3mV 
Total Floor Errors = ±0.45mV or ±3.75mV = 0.0002% or 0.0016% of reading 

Example

 

2

 

For an A type channel the maximum error of a measurement of the fundamental of a 230Vrms voltage at 50Hz when 50 harmonics 

are configured is a worst case of ±0.035% of reading as calculated by: 
Scaling Errors: 

Base Scaling = ±0.03% 

Frequency Dependent Scaling = None at MAINS 
Self‐heating Scaling = ±0.05%*(230V/1000)

2

 = ±0.002645% 

Temperature Scaling = none within 5C of the calibration temperature 
Bandwidth Limit Scaling = none when using AUTO‐TRACK 
Total Scaling errors = ±0.032645% of reading 

Floor Errors: 

Base Floor = 450µV 

AC floor = (100µV/230V) at MAINS = 0.43µV (can be ignored) 
Common‐Mode = if not 3ø3w(2ch) wiring = none 
Common‐Mode = if 3ø3w(2ch) wiring = 1µV*(230V/√3)*50Hz = 6.6mV at (30+90)° = ±3.3mV 
Total Floor Errors = ±0.45mV or ±3.75mV = 0.0002% or 0.0016% of reading 

Harmonic Amplitude Errors: 

(H/N)

2

*0.3% of reading = (1/50)*0.03% = ±0.0006% 

Is fundamental, so no further harmonic amplitude error 
Total Harmonic Amplitude Errors = ±0.0006% of reading 

Example

 

3

 

For an A type channel the maximum error of a measurement of a 10%THD of a 230Vrms voltage at 50Hz when 50 harmonics are 
configured is a worst case of ±0.10% as calculated by: 

(0.005+0.000025*N)*%THD = (0.005+(0.000025*50))*10 = 0.0625%THD 
0.00005*N*√N = 0.00005*50*√50 = 0.0177%THD 

0.015+1/V

AC

 = 0.015+1/230 = 0.0193%THD 

Example

 

4

 

For an A type channel the maximum error of the inter‐channel voltage fundamental phase at 50Hz is a worst case of 

0.02°+0.15°*0.05 = ±0.021° 

Example

 

5

 

For an A type channel the maximum error of the crest factor of a 230V/50Hz voltage is a worst case of 50mV/230V = 0 to +0.00022 

(i.e. biased to a higher reading) 

28.3

 

CURRENT

 

MEASUREMENT

 

SPECIFICATIONS

 

28.3.1

 

CURRENT

 

INPUT

 

CAPABILITY

 

AND

 

CHARACTERISTICS

 

Specification

 

Channel

 

Type

 

Option

 

H

 

Option

 

D

 

HI

 

Range

 

or

 

Auto

‐

Range

 

when

 

on

 

HI

 

Range

 

Option

 

D

 

LO

 

Range

 

or

 

Auto

‐

Range

 

when

 

on

 

LO

 

Range

 

Option

 

X

 

HI

 

Range

 

Option

 

X

 

LO

 

Range

 

No

 

Damage

 

Current

 

Range

 

<8ms 

All 

<200A

RMS

and 

<300A

PK

 

<150A

RMS

and 

<250A

PK

 

<60A

RMS

 and <150A

PK

<200V

RMS

 and 

<300V

PK

 

<20V

RMS

 and <30V

PK

 

<40ms 

All 

<75A

RMS

 

<50A

RMS

 

<40A

RMS

 

<50V

RMS

 

<10V

RMS

 

<1s 

All 

<50A

RMS

<30A

RMS

<5A

RMS

<30V

RMS

 

<5V

RMS

Continuous 

All 

<30A

RMS

 

<20A

RMS

 

<2A

RMS

 

<25V

RMS

 and V

PK

 

<5V

RMS

 and V

PK

 

XT2640 Unpowered 

All 

As Above

<2A

RMS

and <150A

PK

<25V

RMS

 and <300V

PK

Measurable

 

Current

 

Range

 

All 

<225A

RMS

 and A

PK

 

<150A

RMS

 and A

PK

 

<1.02A

RMS

 and A

PK

 

<23.1V

RMS

 and V

PK

 

<0.576V

RMS

 and V

PK

 

Specified

 

Current

 

Range

 

All 

<30A

RMS

 and <200A

PK

<20A

RMS

 and <140A

PK

<1A

RMS

 and A

PK

 

<15V

RMS

 and <20V

PK

 

<0.55V

RMS

 and V

PK

 

Impedance

 

Burden

 

All 

2.5mΩ to 7mΩ

4mΩ to 12mΩ

0.562Ω ± 0.75%

20.5kΩ ± 0.25% 

10.25kΩ ± 0.25%

3dB

 

Bandwidth

 (typical) 

S, A or L 

1.25MHz 

W 

5MHz

3MHz 

 
 
 
 

Summary of Contents for XT2640

Page 1: ...XT2640 Operating Manual 13 July 2016 Page 1 of 187 XT2640 PRECISION MULTI CHANNEL HARMONIC POWER ANALYZER OPERATING MANUAL ...

Page 2: ...NG EXTERNAL CURRENT MEASUREMENT 24 9 6 3Ø3W 3CH OR 3Ø4W WIRING USING INTERNAL CURRENT MEASUREMENT 25 9 7 3Ø3W 3CH OR 3Ø4W WIRING USING EXTERNAL CURRENT MEASUREMENT 26 9 8 MECHANICAL MOTOR MEASUREMENT WIRING 26 9 8 1 Mechanical Speed and Direction Inputs 27 9 8 2 Mechanical Torque Inputs 27 10 POWERING THE XT2640 28 10 1 TURNING POWER ON 28 10 2 TURNING POWER OFF 28 11 MEASUREMENT RESULT TERMINOLOG...

Page 3: ...RS SCREEN 56 12 8 1 Recording Vectors 56 12 9 GRAPHICALLY VIEWING PAST MEASUREMENTS THE HISTORY SCREEN 57 12 9 1 Selecting and Configuring the Traces to Show 57 12 9 2 Changing the way in which time is displayed on the Chart 58 12 9 3 Starting Stopping and Restarting the Chart 58 12 9 4 Prohibiting Data Collection Temporarily 58 12 9 5 Using the Cursor and Zooming the Chart 58 12 9 6 Rescaling the...

Page 4: ...ssment 100 18 4 8 Recording the Results of an Assessment 100 19 MEASURING ELECTRICAL POWER TO EN60034 2 1 REQUIREMENTS 104 20 MEASURING ELECTRICAL POWER TO AVIONICS REQUIREMENTS 106 20 1 CONNECTING THE XT2640 106 20 2 CONFIGURING THE MEASUREMENTS MADE BY THE XT2640 106 20 2 1 AC 3 phase Supplies 106 20 2 2 AC 1 phase Supplies 107 20 2 3 DC Supplies 108 20 3 USING THE XT2640 TO MONITOR THE SUPPLY 1...

Page 5: ...UTER CONTROL OF THE XT2640 131 24 1 1 RS232 Serial Interface 131 24 1 2 LAN Ethernet Interface 132 24 1 3 USB Interface 134 24 1 4 GPIB Interface 137 24 2 COMMAND SYNTAX 138 24 2 1 Special Characters 138 24 2 2 Fields within a Command 139 24 3 RESPONSES TO COMMANDS 140 24 3 1 Response Fields 140 24 4 COMMAND KEYWORDS AND FIELDS 141 24 4 1 Interface Clear Commands 141 24 4 2 Local Remote State Cont...

Page 6: ...ONS 174 28 4 1 Watts VAR and VA Measurement Specifications 176 28 5 POWER FACTOR MEASUREMENT SPECIFICATIONS 178 28 5 1 PF Measurement Accuracy Table 178 28 6 FREQUENCY MEASUREMENT SPECIFICATIONS 179 29 MECHANICAL CHANNEL INPUT AND ACCURACY SPECIFICATIONS MT TYPE 180 29 1 INPUT CAPABILITIES AND CHARACTERISTICS 180 29 2 DIGITAL INPUT MEASUREMENT SPECIFICATIONS 180 29 3 ANALOG INPUT MEASUREMENT SPECI...

Page 7: ... firmware version Document number MO XT2640 UG Rev X5 Print date July 13 2016 Copyright 2015 XiTRON Technologies Inc All rights reserved No part of this publication may be reproduced transmitted transcribed stored in a retrieval system or translated into any language in any form without prior written consent from XiTRON Technologies Inc This document is copyrighted and contains proprietary informa...

Page 8: ...logies If the instrument is defective as a result of misuse improper repair or abnormal conditions or operations repairs will be billed at cost XiTRON Technologies assumes no responsibility for its product being used in a hazardous or dangerous manner either alone or in conjunction with other equipment Special disclaimers apply to this instrument XiTRON Technologies assumes no liability for second...

Page 9: ...tile memory of over 2Gbyte size for high speed data logging at rates up to 500 per second Not a one size fits all with the extra purchase cost operating cost and reduction in performance that entails you only have to pay for of the capabilities and performance you want Up to four power measurement channel cards each of four different channel card types in any combination in a single XT2640 S Provi...

Page 10: ...els Cycle View Screen displays a single cycle of the voltage and current periodic waveforms jitter sampled over multiple cycles within each measurement period giving time resolution down to 2 6ns no configuration needed Standby Power Screen allows EN50564 compliant low power measurements without the need for a computer Assess EUT Screen allows EN61000 3 2 and 12 assessments of compliance without t...

Page 11: ...LOCATED NEAR THE POWER ENTRY CONNECTOR ON THE REAR PANEL MUST BE PROTECTIVE GROUNDED DO NOT REMOVE THE POWER CORD FROM THE XT2640 OR FROM THE SOURCE OF POWER WHILE IT IS MEASURING HIGH VOLTAGES THIS WILL REMOVE THE PROTECTIVE GROUND FROM THE CHASSIS OF THE XT2640 WHICH MAY RESULT IN HAZARDOUS VOLTAGES BEING ACCESSIBLE TO THE USER 4 3 TERMINALS AND WIRING THE XT2640 MEASURES VOLTAGES AND CURRENTS W...

Page 12: ...articular attention should be taken to ensure that there are no significant dents or cracks in any outer surfaces there are no marks or scratches on the front panel LCD touchscreen and that all terminals are securely mounted to the unit and are not cracked or significantly dirty If any abnormality is noted then it is recommended that the XT2640 be serviced prior to being placed into use as safety ...

Page 13: ...6 1 FRONT PANEL LAYOUT 6 2 REAR PANEL LAYOUT LCD SCREEN AND TOUCH PANEL USB DRIVE CONNECTOR POWER INDICATOR OFF No Power Applied RED Power Applied XT2640 Off GREEN XT2640 On CHANNELS 1 TO 4 MAY BE FITTED LAN INTERFACE USB INTERFACE RS232 INTERFACE XT2640 POWER ENTRY CHASSIS GROUNDING ...

Page 14: ...ch is shown by pressing one button so it s easy to remember how to change settings later but what you are now seeing is all you ll ever need to configure for many applications The present setting is shown in each button in a smaller text size if you see anything which needs changing then press that button to change it b MEAS MODE Set to SINGLE VPA c In the CHANNELS area of this screen this area co...

Page 15: ...E VIEW or to use the XT2640 as a powerful oscilloscope SCOPE VIEW STBY POWER enables you to configure run and view the results of EN50564 low power measurements in both numerical and graphical formats ASSESS EUT enables you to configure perform and view the results of EN61000 3 2 or 12 assessments of a EUT if measurements have been configured to do so The XT2640 remembers what you have configured ...

Page 16: ... in a single input terminal pair with resolution down to 0 1µA also capable of being used with a current output CT H High Current up to 30Arms continuous and 200Apk inrush with resolution down to 10µA also capable of being used with a current output CT X External voltage output CT or Shunt Input 20µV to 15Vrms with resolution down to 0 1µV Each channel can be independently configured for voltage s...

Page 17: ...wer can flow in either direction separately integrates power in each direction per phase and total as well as the total Total power W VA VAR and PF measured in addition to the individual phases Max hold maintained for voltage current and power measurements Harmonic analysis of every signal up to the 500th option H500 or 100th standard harmonic 435kHz W channels or 115kHz L A or S channels Built in...

Page 18: ...d has both AC and DC supply inputs or vice versa or two different frequency AC supplies then each supply can be measured in separate VPAs and an efficiency group used to produce the total input or output power from both VPAs Each VPA is independently configured and has the same capabilities as previously described for single VPA applications except only a single oscilloscope in one VPA is allowed ...

Page 19: ... intermediate stage For the example shown above the total charge and discharge AHr for the battery can be measured The VPAs may be configured as either Totally independent and having totally different frequency content signals to each other Or have totally different frequency content signals but make measurements over times which are synchronized to each other Or have the same frequency content si...

Page 20: ... overall system accuracy in most circumstances measuring the voltage at the source and the load current For applications requiring accurate measurements of the power to the load when using low voltages 50V and high currents 1A change the RED V terminal connection to that of the BLUE A terminal instead of the YELLOW A terminal shown above this ensures that the voltage drop across the A terminal doe...

Page 21: ...rrying Ensure wire used is rated for the maximum voltage and current to be encountered Thinner connections are not current carrying Ensure wire used is rated for the maximum voltage to be encountered Many CT devices are isolating in those cases you should ground the A BLUE terminal of the channel if the CT does not ground it XT2640 CONFIGURATION In the XT2640 MEAS CONFIG menu you should appropriat...

Page 22: ...S ONLY DO NOT CONNECT WIRING WHILE VOLTAGE PRESENT ENSURE THAT EACH XT2640 TERMINAL COLOR MATCHES THE WIRE CONNECTOR COLOR BEFORE APPLYING THE SOURCE VOLTAGE DO NOT PASS LOAD CURRENT 2Arms WITH THE XT2640 TURNED OFF XT2640 CONFIGURATION In the XT2640 MEAS CONFIG menu you should set SCALE for the channel to OFF In the XT2640 MEAS CONFIG menu you should set ADJUST for the VPA to NONE SRCE V SRCE or ...

Page 23: ...wn above ensure the best overall system accuracy in most circumstances measuring the voltage at the source and the load current For applications requiring accurate measurements of the power to the load and using low voltages 50V and high currents 1A change the RED V terminal connections to that of the respective BLUE A terminal instead of the YELLOW A terminal shown above this ensures that the vol...

Page 24: ...ated for the maximum voltage to be encountered Phases are shown for descriptive purposes the XT2640 places no reliance on the actual phasing however using those shown ensures that the XT2640 display matches the actual phasing if the channels have increasing channel numbers from left to right in the diagram above Many CT devices are isolating in those cases you should ground the A BLUE terminal of ...

Page 25: ...ge at the source and the load current For applications requiring accurate measurements of the power to the load and using low voltages 50V and high currents 1A change the RED V terminal connections to that of the respective BLUE A terminal instead of the YELLOW A terminal shown above this ensures that the voltage drop across the A terminals does not affect the V measurement at the expense of the c...

Page 26: ...ments of either a motor or a generator In all cases the BNC connectors provided on the MT channel are assumed to be at a voltage close to ground on their outer shield voltages of up to 13Vpk from the XT2640 chassis are accommodated Note If only one of speed and torque are available then mechanical power cannot be computed and is not available however the one signal configured will be available If ...

Page 27: ...e the SPD input as ANALOG and set the scaling and offset settings accordingly for the specific transducer being used The signal range is 12Vpk 9 8 1 2 DIGITAL SPEED AND OPTIONALLY DIRECTION If using a digital speed optionally with direction transducer such as a shaft encoder then the digital signals should be connected to the SPD BNC connector and the DIR BNC connector as applicable You will need ...

Page 28: ...n the touch panel for at least second Do not use excessive force the POWER indicator LED brightens when the panel is detected as being touched DO NOT USE A PEN OR A SCREWDRIVER OR A SIMILAR IMPLEMENT WITH SHARP CORNERS AS IT MAY DAMAGE THE TOUCH PANEL 4 The XT2640 will now power on and you may release the touch panel The front panel POWER indicator LED will change to GREEN and the LCD screen will ...

Page 29: ...o fundamental is available For a VPA total this is determined from the polarity of the sum of the channel VAR results Note There are no minimum signal levels for leading lagging detection The indication is valid at all signal levels 11 3 PEAK AND VALLEY RESULTS There are several types of peak measurement results available from the XT2640 Highest Peak This is denoted on the XT2640 screens by Pk fol...

Page 30: ... W and VAR using total VA 2 Σ W 2 Σ VAR 2 Σ VA setting VA is dependent on the WIRING setting 3ø3w 2ch setting total VA Σ VA 3 2 or for other settings total VA Σ VA VAR is computed directly from the W and VA using total VAR 2 Σ VA 2 Σ W 2 with polarity taken from the sum of the VAR for the channels in the VPA 11 5 7 POWER FACTOR RESULTS VPA total measurement results given for PF are always computed...

Page 31: ... the lead lag determination to determine the polarity of the result In some industry segments this is named effective or apparent phase 11 7 2 HARMONIC PHASE RESULTS Fundamental Voltage Phase is relative to the V fundamental in the lowest numbered channel of the VPA Non fundamental Voltage Phase is relative to the V fundamental in the selected channel Fundamental Current Phase is relative to the V...

Page 32: ...t the labelled condition is active otherwise it is a silver color In many cases a button has two lines of text shown within it and the upper line is of a larger font size than the lower one In these cases the lower line of text shows the present setting associated with the button which can be changed by pressing this button In some cases this shows an associated entered value which may be shown wi...

Page 33: ...cause it is not compatible with the option content channel content or with other configuration commands INTERFACE ERROR COMMAND DATA NOT WITHIN ALLOWED RANGE An interface command was received with a data field which was not within the allowable range of values INTERFACE ERROR COMMAND DATA FIELD SYNTAX ERROR An interface command was received with a data field which did not have a valid syntax INTER...

Page 34: ...status bar which indicates the amount of the XT2640 drive buffer which is being used 0 at the left end 100 at the right end The highest used is indicated by a vertical line within the bar area If this indicates that a significant amount of the buffer has been used then you should consider using a faster drive logging less data or using a longer data logging interval If you press this area it initi...

Page 35: ...t properly INTERNAL or that any external CT has its DC zero set correctly See section 13 for details 12 3 1 SETTING POWER AND MEASUREMENT USER PREFERENCES Pressing the PREFERENCES button on the SYS CONFIG screen initiates the PREFERENCES screen an example of which is shown below Using this screen you can set your preference for how turning on off the XT2640 is controlled and your overall measureme...

Page 36: ...f the LEAD setting is recommended Note Mathematically VAR has usually been described as the sine relationship to the phase shift of the current relative to the voltage so resulting in a positive VAR indicating a leading current but in certain industries the opposite convention is used where a positive VAR indicates a lagging current By definition lead lag is indicated by the polarity of VAR and no...

Page 37: ... is displayed with increasing phase as a clockwise rotation of the chart If Math 360 CCW is selected then the XT2640 returns all phase results as mathematical phases in the range from 0 to 360 no polarity is displayed and the chart on the VECTORS screen see 12 8 is displayed with increasing phase as a counter clockwise rotation of the chart If Delay 180 CW is selected then the XT2640 returns all p...

Page 38: ...THE RS232 INTERFACE For the RS232 interface you must set the baud rate 12 3 2 3 CONFIGURING THE USB INTERFACE There are no configuration settings for the USB interface 12 3 2 4 CONFIGURING THE LAN INTERFACE 12 3 2 4 1 Using DHCP to obtain the LAN Configuration In this case you press the AUTO IP DHCP STATIC IP button and select DHCP There is no other configuration required and if the LAN interface ...

Page 39: ...his screen is navigated away from i e one of the other Main Screen Select Buttons is pressed Note Settings cannot be changed while in remote If you press the MEAS CONFIG button while showing the MEAS CONFIG screen then any changes which have been made will be discarded and the screen will return to showing the presently used configuration 12 4 1 SELECTING THE OVERALL MEASUREMENT MODE If you press ...

Page 40: ...he settings on this screen only affect the selected VPA except as denoted below 12 4 2 1 SELECTING AND CONFIGURING THE CHANNELS IN A VPA This is performed by using the buttons in the CHANNELS area 12 4 2 1 1 Selecting the Channels If you press any of the available channel number buttons then that channel is toggled between selected button highlighted green or unselected not highlighted and colored...

Page 41: ...e current range for all channels in a VPA When configuring a channel with the D current input option the use of the AUTO setting is recommended for most applications however if the load has rapidly and widely changing current or if the user is going to trigger on an inrush current then the HI range should be selected When configuring a channel with the X current input option you should choose the ...

Page 42: ...automatically obtained from the XT2640 VPA which has been programmed to provide that GFUND measurement for this multi unit group Recommendations For 50 60Hz applications the MAINS setting should be used For 400Hz applications the AVIONICS setting should be used When it is required to measure signals with a fundamental frequency close to or above the maximum measurable frequency of the channels in ...

Page 43: ...ncy See section 16 for full details regarding configuring this for measurements on PWM generated signals 12 4 2 2 5 Configuring Spectrum Analysis The SPECTRUM button not shown in the example screen above allows you to enter the desired frequency resolution in Hz and maximum desired frequency in Hz for the spectrum analysis This is only available when MEAS MODE is set to SPECTRUM Note These setting...

Page 44: ...d be used when the V terminals are directly connected across the load voltage so the A terminals are measuring the source current and you wish to obtain the load results Recommendation In most applications this should be set to NONE only if not using external current transducers and either operating at low voltages and high currents or at high voltages and low currents should this be set for an ad...

Page 45: ...e digital SPD signal is used for frequency and direction detection purposes if enabled The DIRECTION button if shown allows you to select if a LO logic level or a HI logic level on the DIR input at the selected edge of the SPD signal is taken as indicating a forward or reverse direction i e a positive or a negative speed respectively The MOTOR SLIP button if shown allows you to select the source o...

Page 46: ...u to select that all mechanical measurement results will be displayed with limited resolution if desired Settings of 3 4 5 and 6 are available Note This only affects displayed numerical results it does not affect any measurements obtained via an interface or via a historically saved record or via data logging Recommendation In most applications this should be set to 5 or 6 if there is significant ...

Page 47: ... button The POWER DATA Screen gives you access to pre formatted numeric measurement results for individual channels or VPAs or to overall power loss and efficiency results There are several formats available as described in the following sections 12 5 1 VIEWING MEASUREMENT RESULTS FOR AN INDIVIDUAL CHANNEL The results for an individual channel can be selected on the POWER DATA screen by pressing t...

Page 48: ...condary data is the inverse cosine of the PF data with the polarity set from the lead lag determination The frequency shown if any is the fundamental frequency obtained for this channel from the source configured by the FUND setting in the MEAS CONFIG screen for this channel If MEASURING is shown for frequency with no other measurement results then this indicates that the first measurement is bein...

Page 49: ... integrated only while the DC Amps reading is negative This screen shows the integrated measured or integrated average measured Volts Amps Watts VA VAR and PF for integrated average and the integration time If no integration has been performed then NO DATA is displayed Integration can be configured started or stopped by pressing the Integrate Info area in the bottom of any main data screen See sec...

Page 50: ...onversion is also shown Whether the current is leading or lagging the voltage can be determined by the direction of an arrow shown immediately after any PF data shown If the arrow is pointing upwards then the current is leading if downwards then it is lagging The PHS data in the PF group secondary data is the inverse cosine of the PF data with the polarity set from the lead lag determination The f...

Page 51: ...data integrated only while the DC Amps reading is negative This screen shows the integrated measured or integrated average measured mean Volts mean Amps total Watts total VA total VAR and total PF for integrated average and the integration time If no integration has been performed then NO DATA is displayed Integration can be configured started or stopped by pressing the Integrate Info area in the ...

Page 52: ...can be selected on the POWER DATA screen by pressing the Source Select button and then selecting MOTOR This selection is only available if an MT channel is installed in the CH4 position and at least torque or speed is configured to be measured EXPORTING OR RECORDING MEASUREMENTS The methods for performing this are fully described in section 21 Measurements can be exported to a CSV format textual f...

Page 53: ...ressing the CUSTOM DATA button A simple example custom data screen is shown below Defining the CUSTOM DATA screen requires one of the following Using the supplied application to create the desired screen and then sending the created custom screen definition to the XT2640 via an interface Or exporting the binary custom screen definition from a XT2640 which already has the desired custom screen defi...

Page 54: ...lative chart and only the fundamental is available If the frequency is shown colored orange then the harmonics are not locked closely enough to allow accurate measurement of all configured harmonics The actual number of harmonic bars shown may be lower than the configured setting due to the maximum harmonic frequency constraints for the selected channel dependent on the channel type the actual fun...

Page 55: ...hey can be exported from a XT2640 which already has the harmonics limits defined and then importing that file into this XT2640 using a USB drive c Or they can be imported from an ASCII file on a USB drive which has been generated by you See section 21 6 2 for details regarding this d Note that this only needs to be performed once if the same set of limits is to be used repeatedly The XT2640 intern...

Page 56: ...the trace being changed shows which color will be used for that trace and the numerical data for it Note If no fundamental harmonic data is available for the selected channel or VPA then the vector chart is blank there are no numerical results on the left side and NO FUNDAMENTAL is displayed centered in the chart If no traces have been enabled to be shown then the vector chart is blank there are n...

Page 57: ...verage is drawn with full brightness while the extents are shown using a lower brightness between the lowest and highest extents The minimum and maximum measurements from every individual measurement period is maintained and for individual sample based data such as peak this gives you continuous coverage of down to 1µs resolution data for millions of years without data loss To the left of the char...

Page 58: ...d nominal value as the offset and set for the offset CENTER location and set the scaling as desired to make any deviations easily visible 12 9 2 CHANGING THE WAY IN WHICH TIME IS DISPLAYED ON THE CHART The TIME button second from the left across the top of the screen allows you to select how times are shown on this screen If TIME is selected then time is shown below the horizontal axis of the char...

Page 59: ...e zoom changes to reflect that it is constrained to be a minimum of 1 1000th of the overall history timespan however the cursor position remains the same Any zoom can be cancelled and the screen returned to the non zoomed state without a cursor at any time by pressing the CURSOR button while it is highlighted 12 9 6 RESCALING THE CHART TRACES You can press the AUTOSCALE button to rescale all trace...

Page 60: ...HDsig VOLTS An VOLTS An PK VOLTS An H1 AMPS CHn DC AMPS CHn AC AMPS CHn ACDC AMPS CHn AMPS CHn CF AMPS CHn PK AMPS CHn HIPK AMPS CHn LOPK AMPS CHn Hn AMPS CHn P1 AMPS CHn THDf AMPS CHn THDsig AMPS CHn VALLEY AMPS CHn PK VLY AMPS An pX DC AMPS An pX AC AMPS An pX ACDC AMPS An pX AMPS An pX CF AMPS An pX PK AMPS An pX HIPK AMPS An pX LOPK AMPS An pX Hn AMPS An pX P1 AMPS An pX THDf AMPS An pX THDsig...

Page 61: ...g the scope capture and then replace the original settings after completion of the capture perfect for current inrush measurements Continuous or single trigger Perfect for capturing non periodic waveforms and transients such as inrush current for example Which screen is viewed is selected by the upper left button of the SCOPE screen The presently selected screen view name is displayed in the butto...

Page 62: ...ing in the units of the selected signal Note that this is entered per division and there are a total of 6 vertical divisions in the chart 3 above and 3 below the centerline This can also be set to the best 1 2 5 values to show all traces within the extents of the chart when the AUTOSCALE button is pressed on the CYCLE VIEW screen The button in the OFFSET column allows you to set the signal level w...

Page 63: ...s you to select the trigger detection type If you select DC rising edge the scope is triggered when the selected signal changes from below the trigger level to above the trigger level HF filtering is provided to reduce the possibility of small glitches causing a trigger If you select DC falling edge the scope is triggered when the selected signal changes from above the trigger level to below the t...

Page 64: ... power measurements while still allowing accurate measurement of inrush currents Although this can be used with continuous triggering this is primarily intended for use with single triggered captures The example configuration shown above shows a typical configuration for inrush current capture with trace 1 configured as showing the current signal See also section 14 for full details regarding inru...

Page 65: ...le current level which you expect the inrush current to exceed Typically SINGLE captures are used for inrush capture If the intention is to trigger on a mains supply surge then the ABS DC trigger type is recommended using the voltage signal as the trigger source and setting the trigger level to a suitable voltage level just above the peak level of the highest expected normal mains voltage Typicall...

Page 66: ...ide of the screen changes to show the signal level captured for each trace at the time of the present cursor position You may zoom the chart horizontally by pressing the ZOOM button when pressed you are prompted the select the zoom timebase While zoomed When the ZOOM button is pressed the cursor position is centered in the screen The ZOOM button is highlighted colored green The cursor remains set ...

Page 67: ... types as it is above the 115kHz upper limit for L S or A channel types The XT2640 can be configured to measure the spectrum of all signals at the same time to this requirement Note SPECTRUM mode is a single VPA mode only one VPA can be used in spectrum analysis mode You do not have to be viewing the SPECTRUM screen for spectrum data to be measured When configured for spectrum analysis the XT2640 ...

Page 68: ... during the PROCESSING phase of spectrum analysis then the processing continues and the results of this processing will subsequently be displayed when this phase completes but any further measurements will not be performed until the measurement hold is released 12 13 4 VIEWING SPECTRUM ANALYSIS RESULTS When operating in SPECTRUM mode the HARMONICS screen button shown on the right side of most scre...

Page 69: ... The file is then written Alternatively you can make a record of the SPECTRUM screen by saving an image of it to a graphic file on an external USB drive attached to the front panel USB port Briefly this is performed by Insert the drive into the front panel USB port and wait for it to be READY Display the screen to be recorded Press the DRIVE INFO area of the screen the screen shows the file export...

Page 70: ...for any externally applied DC offset so you must ensure that there are no DC signals present on the terminals of the XT2640 which are not wished to be adjusted for This is achieved by pressing the SYS CONFIG button from any main screen and then pressing the EXTERNAL button in the DC ZERO area You are then shown a screen which requests that you select whether to adjust the DC offset for all channel...

Page 71: ...uires no specific configuration changes to the MEAS CONFIG screen to perform an inrush measurement as any changes required will be automatically applied This has the advantage of being an easily repeatable measurement the measurement is not dependent on remembering to re configure for inrush measurements and remembering to reverse that later and the configuration of the SCOPE can typically be left...

Page 72: ...creen below shows an example of two traces being configured to be captured current and voltage As shown here it is useful to include the supply voltage as a trace as this allows you to inspect the supply voltage to see if it was being significantly disturbed by the inrush surge current and so having an impact on the inrush current measurement Trace 1 must be the signal which will measure the inrus...

Page 73: ...in this manner you must ensure that the present MEAS CONFIG screen settings are compatible with performing such a measurement and then replace the normal power measurement configuration settings afterwards The XT2640 must be configured typically with a UNFILTERED setting for BANDWIDTH or alternatively with a specific frequency bandwidth limit All D current option channels which will be used for th...

Page 74: ...y saving an image of the screen showing the results to a graphic file on an external USB drive attached to the front panel USB port Briefly this is performed by Insert the drive into the front panel USB port and wait for it to be READY Display the screen to be recorded Press the DRIVE INFO area of the screen the screen shows the file export import screen Press the SCREEN IMAGE button The screen ch...

Page 75: ...DC ONLY COUPLING 15 1 CONFIGURING INTEGRATION You may configure for manually controlled integration or for automatically time controlled integration by pressing the Integration Info area when not performing integration The START button on this screen makes any changes immediately active and starts integration 15 1 1 SELECTING TO PERFORM MANUALLY TIMED INTEGRATION If it is desired to manually contr...

Page 76: ...onfigured run time has expired Press the Integration Info Area to stop integration PAUSE Indicates that a timed integration is being performed the delay time has expired but the XT2640 is not collecting integrated data because you have held measurement results The progress bar to the right shows how much of the configured run time has expired Press the Integration Info Area to stop integration Not...

Page 77: ...ows the file export import screen Press the SCREEN IMAGE button The screen changes to allowing you to enter a file name Enter the desired file name the extension is automatically provided If the file already exists then you are prompted to respond if you wish to overwrite it or not The file is then written ...

Page 78: ...is and is nominally centered close to 50 then higher carrier frequencies can be accommodated with accuracy 16 2 WIRING RECOMMENDATIONS You should keep all wiring between the source the XT2640 and the load as short as possible If using the 3ø3w 3ch method you should ensure that the inter connection between the three V terminals is kept as short as possible and is left floating Generally PWM generat...

Page 79: ...figuring the bandwidth of measurements of PWM based signals each method has its merits 1 Using a wide bandwidth for measurements If it is desirable to ensure that all non harmonic measurements such as voltage current and power contain the signal content with as wide of a bandwidth as possible then the BANDWIDTH setting should be set to UNFILTERED All non harmonic measurements made by the XT2640 wi...

Page 80: ...made are within an overall control loop e g motor speed control these signals often have considerable variability so the use of result smoothing is recommended This is selected by your choice for the RESPONSE setting and MEDIUM is the recommended choice in most PWM applications Note This setting applies to all measurement results Often in PWM applications harmonic results require more smoothing th...

Page 81: ... Use the same RESPONSE setting in both VPAs In this manner the two VPA measurements will be closely synchronized by always starting them at the same time even though they might not actually end at exactly the same time so efficiency will track fast changes to signals as much as possible but there may be a slight difference between the two measurement periods and neither measurement will be continu...

Page 82: ...WER screen should generally not be used for these methods but you should note that the method employed in the STBY POWER screen to EN50564 2011 5 3 2 is the recommended approach and should always be used if there is any doubt regarding the behavior of the product or stability of the mode Note The word sampling in EN50564 2011 relates to sampling of the individual measurement period results of the ...

Page 83: ...ended which fully meets this requirement 17 1 1 4 RECOMMENDED HARMONICS SETTING EN50564 2011 para 4 3 2 requires limits on the THD of the voltage source and requires that this THD shall be computed using up to and including the 13th harmonic Recommendation The setting should be at least 13 for HARMONICS Note The reported voltage THD on the STBY POWER screen only includes up to the 13th harmonic no...

Page 84: ...wer during the final 2 3rd of the total period is less than that allowed by EN50564 2011 For convenience where strict adherence to the standard is not required the XT2640 allows the user to configure a total period of other than 15 minutes The XT2640 will automatically extend the total period if the slope during the final 2 3rd of the elapsed time does not achieve the maximum required and will not...

Page 85: ...ave to remain on the STBY POWER screen during the measurement The measurement will automatically progress whether this screen is being displayed or not The measurement hold capability of the XT2640 is not applied to the STBY POWER results The following data is shown in each of the results areas on this screen listed in order from top to bottom in each area Except for the total measurement time all...

Page 86: ... the error of performing this adjustment is included in the reported Ue figures so Uw in EN50564 2011 D 1 2 may be ignored when you report results unless there are significant wiring losses 17 1 3 7 WATTS MEASUREMENT GRAPH Below the numerical data a chart graphically shows every sampled power in watts vs time during the entire measurement 17 1 4 RECORDING STBY POWER DATA The method for performing ...

Page 87: ...ally should be in accordance with the standard requirements In these situations only sections 18 1 2 and 18 2 may have relevance to you When configured for EN61000 3 2 or 12 measurement modes the majority of the functions and measurement availability in the XT2640 are unchanged The changes necessary as a result of the requirements of EN61000 4 7 are as follows The fundamental frequency range the m...

Page 88: ... calculations regarding the value of Rsce which is defined and referenced in many clauses of EN61000 3 12 18 1 2 1 XT2640 VOLTAGE CONNECTIONS AND THE ADJUST SETTING The wiring used for the voltage terminal connections carry very little current and are not covered by any standard requirements This wiring only needs to have sufficient insulation rating for the voltage being carried and impedances as...

Page 89: ...SELECTION For both EN61000 3 2 and 12 the XT2640 does not decide which classification a EUT falls into and which limits table to apply It is your responsibility to select the correct classification and or limits table to apply when assessing a EUT following the guidelines of each standard and taking into account the features of the specific EUT When an assessment is made the XT2640 takes and recor...

Page 90: ...e resistance are applicable for a given Rsce value Generally a Rsce value of 33 may be applied which is then generally acceptable for the EUT to be used on all supplies but often a EUT will not meet this requirement so a higher Rsce must be selected by you which allows the EUT to meet the requirements but restricts the final use of the EUT only to certain supplies The XT2640 assists with this by a...

Page 91: ... Classical DC shunts generally do not meet this requirement the use of folded or coaxial shunts is recommended You should also consider that since shunt inductance will always increase the measurement results for high order harmonics so if the EUT is passing the requirements with the shunt being used then it would also pass possibly with a wider margin with a perfect shunt The routing of the volta...

Page 92: ...e total noise always increases CF amplitude modulation always increases CF any distortion content which results in an increase in the crest factor this may be overly restrictive in practice In the XT2640 it is assumed that the intention of the standard is to define a 0 01 range centered on the nominal value for a pure sinewave instead of the 1 41 value as stated so the actual allowed range for sup...

Page 93: ...igured such that no overload will occur If a voltage overload is shown then there is something seriously wrong with the supply voltage and it should be investigated 18 2 CONFIGURING THE XT2640 FOR EN61000 3 2 OR 12 MEASUREMENTS This is achieved by using the MEAS CONFIG screen as follows 1 Access the MEAS CONFIG screen by pressing the MEAS CONFIG button on the right side of the XT2640 screen 2 Pres...

Page 94: ... instantaneous harmonics meet the basic requirements of those standards Any reference levels required to be used with the selected limits are those measured at that instant and Rsce for EN61000 3 12 is assumed to be 33 This screen can be used to check the harmonic content of the supply source when unloaded as required by EN61000 3 12 It can also be used to check the supply source prior to EN61000 ...

Page 95: ... measured levels are used by the XT2640 USER REFS When this is selected the configured reference levels are used by the XT2640 regardless of the measured levels LAST REFS When this is selected the reference levels present at the time that this was selected are used for all future assessments until this setting is changed Recommendation In most situations MEAS REFS should be used Only when indicate...

Page 96: ...types of EUT which require a Watts reference level would rarely have multi phase supplies The XT2640 assumes that this is the Watts reference for a single phase if you decide that this is not the case then you should enter the total Watts and select for USER REFS to prevent it being overridden and then manually check the measured Watts results shown by the XT2640 to determine if the reference need...

Page 97: ...1000 3 2 and 12 then DELAY ONLY or possibly AUTO STOP settings should be considered along with entering values for the start stop detection power level and the delay to use AUTO PAUSE is rarely used but is included to allow full configuration capability particularly when mitigation is needed for an assessment failure AUTO STOP is rarely used but is useful if the EUT has only a relatively short per...

Page 98: ...ply voltage phase was not within the allowed range per EN61000 3 2 clause A 2b or EN61000 3 12 clause 7 2c throughout the assessment Recommendations If codes 1 and or 2 are found then either the assessment was not performed with the supply source set correctly or the Unom and or Fnom settings in the XT2640 were incorrectly set In this later case you only need to change those settings with a REASSE...

Page 99: ...e instead calculated from the average individual harmonics throughout the assessment including disregarding harmonics in the calculation of THC and PWHC if their average measured value is below the required disregard level see EN61000 3 12 clause 4 2 5 18 4 4 5 GRAPHICALLY CHARTED RESULTS Below the textual results is a chart which shows one of various measurements made by the selected channel as t...

Page 100: ...E which is only shown while the XT2640 is paused in this manner While the CONTINUE button is shown you should change the EUT conditions according to the instructions in the standard and then press the CONTINUE button to start the next interval which will be started immediately In this manner each interval has an identical assessment time and all measurements while paused are disregarded as not bei...

Page 101: ...ord The next set of records shows details about the voltage supply 10 SUPPLY V configured maximum average minimum the last three are repeated for each phase if multi phase 11 SUPPLY F configured maximum average minimum 12 RSCE configured assessed Only filled if recording a EN61000 3 12 assessment but record is always present 13 SUPPLY ERROR code code is 0 if no errors otherwise is the addition of ...

Page 102: ...d if recording a EN61000 3 12 assessment but record is always present failure code is 0 if no failure or 1 if failed to meet the requirement 78 Always a blank record The next set of records gives historical measurements during the assessment enabling you to generate graphs if you wish to Measurements of Arms Watts THC POHC PWHC and every harmonic are available for each phase of the supply 79 Descr...

Page 103: ...XT2640 Operating Manual 13 July 2016 Page 103 of 187 You can also save an image of the screen as described in 23 5 of this document ...

Page 104: ...ons for PWM driven motors contained in section 16 should be followed for those situations HARMONICS is generally not needed so setting this to 0 or 1 is recommended The other MEAS CONFIG settings are not important for best performance so may be set according to the recommendations of section 12 4 To achieve the necessary accuracy the use of the A type channels with the H current option is recommen...

Page 105: ... 01 0 10 1 00 10 00 1 10 100 1 000 C U R R E N T VOLTAGE EN60034 2 1 Operating Area for XT2640 with AH channels 10 or 20Hz to 65Hz 2kHz filter PWM depth 10 Any voltage or current within this bounded area meets the 0 2 power measurement accuracy requirement ...

Page 106: ...f assisting you in the execution of that test it only indicates that it may be of limited use or that XiTRON has not evaluated the use of the XT2640 to that requirement For example the SCOPE or HISTORY capabilities may be of use in many test steps 20 1 CONNECTING THE XT2640 For all tests carried out to these requirements the XT2640 should be connected using one of the methods described in section ...

Page 107: ...ements because of the 300kHz BANDWIDTH setting used 20 2 2 AC 1 PHASE SUPPLIES For the A RANGE setting For SD AD or WD channels it will be as shown above This will not be shown if using SH AH or WH channels as no setting is required The AUTO setting should be chosen as shown above the text shown in each A RANGE button may have a different range LO or HI indicated as that shows the actual range sel...

Page 108: ...The XT2640 may be used to confirm that the supply voltage and frequency are as required for many of the tests to be performed This is performed by using the POWER DATA screen which should be selected to display the results for the entire VPA i e the entire supply showing the COUPLED data so the AC DC or the DC data is shown as configured for this supply and showing the full DETAILED information Th...

Page 109: ... 16 5 1 8 1 1 this is an impossible measurement to perform as it requires that the distortion be measured over an infinite number of harmonics In this manual it is assumed that the requirement actually intended that this measurement be performed over the same number of harmonics as defined for the current distortion tests in each requirement This is performed by using the POWER DATA screen which s...

Page 110: ... VOLTAGE THD AND LOAD CURRENT THD This is performed by using the POWER DATA screen which should be selected to display the results for each channel showing the FUNDAMENTAL data and showing the full DETAILED information In the secondary data shown in a smaller white colored text for voltage and for current is a measurement result entitled THDf This is the percentage distortion content referenced to...

Page 111: ...current Apk and Vly data The difference between these is the difference between the highest peak and the lowest valley encountered during the period between pressing the CLEAR button and recording the result 6 Step 2 clears the data for all channels so for a 3 phase supply you do not need to repeat the entire procedure for each phase if all phases are being modulated Just repeat step 5 changing th...

Page 112: ... each other via an existing network if desired All such instruments must be visible to each other on that network In this case it may be desirable to use DHCP or FIXED IP LAN modes instead of AUTO IP 21 1 2 INTERCONNECTING WHILE ALSO USING THE LAN INTERFACES WITH A COMPUTER In this case the XT2640s communicate with each other over the LAN network to which each unit is connected using whatever LAN ...

Page 113: ...r measurement cannot be started until all such measurements have been completed within all VPAs in all configured units in this manner See section 22 for further details regarding this Note Only units configured to use the SYNC measurement mode are synchronized in this manner Other than configuring the required units to use the SYNC measurement mode no other configuration is necessary to achieve t...

Page 114: ...tual starting date time is actually the same for all such units 21 7 IN MID AND OUT TOTAL POWER AND EFFICENCY DATA IN A GROUP OF UNITS All units within a multi unit group automatically provide their IN MID and OUT power data to all other members of the group without needing configuration The IN MID OUT and Efficiency data available from any individual XT2640 within the group always includes the da...

Page 115: ...to within 10µs and for VPAs in different XT2640 s using the Multi Unit capability this is extended slightly by the LAN interface delay The synchronizing information passed between multiple XT2640 s is a single minimum length packet on the LAN interface which is multicast to all configured XT2640 s with the highest priority so typically this incurs an additional delay of 6 4µs times 1 the number of...

Page 116: ... in voltage and or current levels of 3 1 or less which is very dominant in these situations as such a change forces loss of synchronization and the inaccuracy caused by forcing the highest suitable range is generally much larger than the inter measurement delay errors e g if inaccuracy is specified as 0 05 range then that is an error of up to 0 45 caused by selecting a fixed range which is only on...

Page 117: ...ingle physical drive some multi drive convertors cannot be used Meet USB2 0 or higher using full speed note that if marked as High Speed then it also meets the Full Speed requirement Require less than 500mA of power from the USB port some USB3 0 drives do not meet this requirement The drive must use 512 bytes per sector this is a requirement of the USB Mass Storage Class but there are a few drives...

Page 118: ...the XT2640 the background of the USB Drive Info area flashes a dark maroon color Do not remove a drive while this is colored Many drives have an LED or similar on many drives this indicates activity but on some drives this indicates connection state Do not rely on a LED mounted on the drive for deciding whether a drive can be safely removed If using a computer running Windows to format a drive Dep...

Page 119: ...hs but is commonly used for graphics images Gimp Adobe Photoshop Windows Photo Viewer Paint and Word are just a few examples of programs which can open these files these program names may be trademarks of their respective owners These files are quite large 751Kbytes and are uncompressed images for maximum quality 23 5 2 BINARY CFG EXTENSION FILES These types of exported files have a proprietary bi...

Page 120: ...low is an example of the first few records of the VPA data section only VPA1 has measurements available in this example DATA VPA1 VPA2 VPA3 Frequency 50 0373E 0 V13 pk 0 00000E 9 V13 dc 0 00000E 9 V13 ac 0 00000E 9 V13 acdc 0 00000E 9 V13 rect 0 00000E 9 V13 CF 0 00000E 9 V13 FF 0 00000E 9 V23 pk 0 00000E 9 V23 dc 0 00000E 9 As shown above some of this data is labelled V13 or similar V13 indicates...

Page 121: ...2769 records The first record contains a heading describing each column The first column of every line contains the time in seconds units relative to the trigger point following that are columns for each channel and signal All possible data columns are always included data which is not captured has a blank field The file is always ordered in increasing time Below is an example of the first few lin...

Page 122: ...n contain invalid data points at certain times because data at that specific time was not captured you should interpolate between the surrounding valid points as needed TIME Max CH2 Hz Avg CH2 Hz Min CH2 Hz Max CH2 V CPL Avg CH2 V CPL Min CH2 V CPL 783 813E 3 50 0000E 0 50 0000E 0 50 0000E 0 247 097E 0 247 097E 0 1 56763E 0 50 0000E 0 50 0000E 0 50 0000E 0 247 121E 0 247 109E 0 2 35144E 0 50 0000E...

Page 123: ... CSV If present this file is listed along with any binary custom screen definition files present on the drive when the CUSTOM SCREEN file type is selected in the IMPORT area of the screen A custom screen is like a spreadsheet composed of 57 cells arranged in 15 rows with row 0 the topmost row only having a single column column 0 and rows 1 through 14 having 4 columns the leftmost column is 0 the r...

Page 124: ...ed 6 Three sets of characters separated by the colon character each of which forms an integer between 0 and 255 inclusive setting the intensity for the red green and blue colors respectively 7 A definition of the measurement result to show see 24 5 RDEF Measurement Definition Sub Fields for the allowed formats of this field 8 A numeric character which sets which defines if the measurement result i...

Page 125: ...n An application is provided with the XT2640 allowing you to convert a standard image file into the format needed for this file The image must be exactly 800 pixels wide by 480 pixels high to be used by this utility 23 7 DATA LOGGING The XT2640 has the capability of data logging up to 16 user defined measurements or sets of harmonics measurements at a user defined interval This can be performed to...

Page 126: ...en can also be used to view the status of data logging while data is being captured You can either stay on this screen or return to it later to view the status You do not have to remain on this screen during data logging There are four areas on this screen the lower area shown in this example showing the status is only shown if either a data logging activity is presently taking place or a previous...

Page 127: ...selected you can jump to any of the four entries directly by pressing the respective entry area You can enter a numeric between 0 and 99 into any of the four entries The actual time used is the total time created by combining all four entries with their respective units When the ENT button is pressed the selected entry area automatically changes to next entry to the right unless the seconds entry ...

Page 128: ...g has previously been performed but no drive was inserted to save that data and then a further data log is started the data captured by the prior data log will be lost Stopping data logging only stops the collection of data the data saved in the buffer is still written out to the drive or to internal memory You can also stop this by pressing the ABORT button while not actively data logging but sti...

Page 129: ... integrity of the resulting file is unaffected Because writing data to the drive can lag behind the rate at which data is being collected data will continue to be saved to the drive after data logging has been stopped manually or the configured run time has elapsed Since the sustained write speed of a USB Flash Drive may be 500Kbytes sec and the buffer may contain up to 32Mbytes and the data writt...

Page 130: ...l drive is fastest if there are no other files on it this ensures that the XT2640 can write the file into consecutive areas of the drive For best speeds use a portable hard drive not a flash drive Hard drives typically have more consistent and faster write speeds ...

Page 131: ...e overall speed Also many convertors have buffers for transmitted and received characters within the convertor itself Experience has shown that the state of the buffer for characters transmitted from the computer to the XT2640 is not properly managed in some convertors which can result in buffer overrun This can cause character loss when performing high speed transfers of commands to the XT2640 If...

Page 132: ... IPv4 TCP IPv4 DHCPv4 mDNS IGMPv3 reducing to v1 or v2 automatically as needed TCP Port 10733 Max MTU 1500 maximum Ethernet payload Remote Connections Only one remote connection is allowed at any given time Connector RJ45 Cable required CAT5 or CAT5e UTP or STP Cable Length 100m per standard 24 1 2 1 CONNECTING TO THE LAN INTERFACE The LAN connector located on the rear panel of the XT2640 must be ...

Page 133: ...ns with a computer with which it does not have a TCP IP socket established which can only be established by the computer not by the XT2640 Reception of any broadcast requests other than DHCP only if enabled and ARP all other received broadcasts are silently ignored Transmission of any broadcast packets other than DHCP only if enabled and ARP only as required to ensure the uniqueness of its own IP ...

Page 134: ...en the port transmit strings through the port receive strings through the port and close the port should be directly made through simple calls to these DLL files Header files defining these calls for VB NET for C and for C C are also provided SLABCP2110 vb SLABCP2110 cs and SLABCP2110 h respectively When compiling applications using the Visual Studio development platform you should compile for x86...

Page 135: ...ESS HID_UART_INVALID_PARAMETER HidUart_GetString This function returns a null terminated vendor ID string product ID string serial string device path string manufacturer string or product string for the device specified by an index passed in deviceNum The index for the first device is 0 and the last device is the value returned by HidUart_GetNumDevices 1 HID_UART_STATUS HidUart_GetString DWORD dev...

Page 136: ...h can be less than the number of bytes requested This function returns synchronously after reading the requested number of bytes or after the timeout duration has elapsed Read and write timeouts can be set using HidUart_SetTimeouts HID_UART_STATUS HidUart_Read HID_UART_DEVICE device BYTE buffer DWORD numBytesToRead DWORD numBytesRead device Device object pointer as returned by HidUart_Open buffer ...

Page 137: ...24 1 4 GPIB INTERFACE The GPIB capabilities as defined by IEEE488 1 are SH1 AH1 T6 L4 SR1 RL1 PP1 DC1 DT0 C0 E2 24 1 4 1 CONNECTING TO THE GPIB INTERFACE It is recommended to use a high quality shielded GPIB cable Suitable cables are available from XiTRON in a selection of lengths 24 1 4 2 REMOTE AND LOCAL OPERATION The GPIB itself has a protocol for establishing and controlling the local remote s...

Page 138: ...fine the action of the command The available command keywords and the fields required for each are described in tables later in this section More than one command can be present in a single command set in which case each command is separated from the previous by a command separator character If an error is found in any command within a command set then that command and any remaining commands which...

Page 139: ...ot character Note that STRING fields are only terminated by a command terminator or separator character and may contain what would normally be any other separator character if printable Examples of valid STRING fields are This is a string field Volts 24 2 2 3 NR1 COMMAND FIELD SYNTAX A NR1 field is any combination of ASCII numeric 0 through 9 characters which form an integer value A NR1 command fi...

Page 140: ...the standard 7 bit ASCII character set using 8 bit encoding the 8th bit is zero independent of the actual interface being used You may request more than one response in a set of commands in which case each response or set of responses is separated from the previous by a comma separator and the responses are included in the same order as they were requested A complete response is always terminated ...

Page 141: ... 24 4 2 LOCAL REMOTE STATE CONTROL COMMANDS The XT2640 automatically enters the REMOTE state when any command is received via an interface While in the REMOTE state a front panel user cannot change the measurement or interface configuration without first selecting to return to the LOCAL state Interface commands are always actioned independent of the LOCAL REMOTE state These commands are invalid co...

Page 142: ...isabled to enabled OPC Responds with the NR1 OPC register contents and clears the register The response forms a single byte quantity with the following logical bit meanings b0 is the LS bit for other than the GPIB interface b0 Set if an interface command error did not occur b1 Set if an interface command had too many or too few fields b2 Set if an interface command field syntax or data range error...

Page 143: ... f 0 or DMY f 1 displayed date format DATE Responds with the STRING format present date as selected format E g DD MM YYYY TIME h NR1 0 to 23 Sets the hour h 24 hour format minute m and second s The s field is optional m NR1 0 to 59 s NR1 0 to 59 TIMEFMT f NR1 0 or 1 Sets 24 hour f 0 or 12 hour f 1 displayed time format TIME Responds with the STRING format present time as selected format E g HH MM ...

Page 144: ...0 integrated results are not being updated 1 integrated results are going to be updated after the configured delay has expired 2 integrated results are held because of measurement hold 3 integrated results are being updated MCR Responds with the NR1 MCR Measurement Completion Register and clears it The NR1 is a 32 bit word formed by the following logically or ed bits b0 is the LS bit b0 through 2 ...

Page 145: ...number of sets of commands including all in the same set of commands COMMAND KEYWORD FIELD s FIELD FORMAT FIELD DATA RANGE DESCRIPTION EDITCONFIG Sets the configuration to be edited by the interface to that presently being used in the XT2640 SAVECONFIG Sets the presently used configuration within the XT2640 to include all changes made via the interface since the prior EDITCONFIG or SAVECONFIG comm...

Page 146: ...s the fundamental frequency for VPA v f 0 No fundamental freq ignored f 1 Fixed fundamental freq sets the frequency f 2 V input measurement freq sets the maximum allowed frequency f 3 A input measurement freq sets the maximum allowed frequency f 4 MAINS fundamental freq ignored f 5 AVIONICS fundamental freq ignored f 6 through 8 Use VPA1 through 3 resp as the fundamental frequency freq ignored can...

Page 147: ...ND KEYWORD FIELD s FIELD FORMAT FIELD DATA RANGE DESCRIPTION INTEGAUTO i NR1 0 or 1 Sets that integration will be automatically timed i 1 or manually stopped and started i 0 INTEGDELAY d NR1 0 to 99 Sets the automatically timed integration start delay time to d days h hours m minutes plus s seconds h NR1 0 to 99 m NR1 0 to 99 s NR1 0 to 99 INTEGRUN d NR1 0 to 99 Sets the automatically timed integr...

Page 148: ...the Motor Torque shall be measured according to n as follows 0 No torque measurement 1 Torque measured using an analog input on the TRQ connector 2 Torque measured using a digital input on the TRQ connector TRQOFFSET n NR3 1e9 to 1e9 Sets that the offset for torque measurements shall be n in units of Nm This only has effect for TRQ settings of 1 or 2 TRQSCALE n NR3 1e9 to 1e9 Sets that the scale f...

Page 149: ...nds with the NR1 Bandwidth Limit setting for VPA v 0 Auto Track Bandwidth Limit 1 No bandwidth limit 2 Fixed frequency bandwidth limit this is followed by a NR3 field containing the bandwidth limit frequency in Hz CHANNELS v VDEF Responds with the NR1 channel inclusion setting for VPA v 0 none 1 through 15 additive channel selection CH1 1 CH2 2 CH3 4 CH4 8 COUPLE v VDEF Responds with the NR1 defau...

Page 150: ...FGROUP Responds with the NR1 efficiency group setting for motor power 0 None 1 IN 2 MIDDLE 3 OUT MTRPERIOD Responds with the Nr1 measurement period for motor measurements 0 10ms measurement period 1 30ms measurement period 2 100ms measurement period 3 300ms measurement period 4 1s measurement period 5 3s measurement period 6 10s measurement period 7 30s measurement period 8 100s measurement period...

Page 151: ...0µs 4 200µs 5 500µs 6 1ms 7 2ms 8 5ms 9 10ms 10 20ms 11 50ms 12 100ms 13 200ms 14 500ms 15 1s 16 2s 17 5s 18 10s 19 or 20s 20 TRIGGER Responds with the scope data capture triggers settings as the following four fields 1st field NR1 is the trigger input selection 0 Trigger using CH 1 V input signal 1 Trigger using CH 1 A input signal 2 Trigger using CH 2 V input signal 3 Trigger using CH 2 A input ...

Page 152: ... until ENDDCZERO is received DCZ Responds with the NR1 DCZ register b0 through 3 set if CH 1 through 4 resp are performing an INT DC Zero activity Each bit clears when the activity is successfully completed or ENDDCZERO commanded DCZERR Responds with the NR1 DCZERR register b0 through 3 set if CH 1 through 4 resp have found an error during an INT DC Zero activity ENDDCZERO Terminates an INT DC ZER...

Page 153: ...harmonic starting with the start harmonic up to and including the end harmonic the fundamental is harmonic 1 c CDEF start NR1 1 to 500 end NR1 start to 500 HISTORYDATA n NR1 2 to 1024 Responds with n data points of historical data defined by def starting at historical data collection time start and ending at end both in seconds relative to the time at which historical data collection was last star...

Page 154: ...2 to 1024 end NR3 0 0 def STRING W V VCF VTHD FREQ A ACF PF or ERR STBYVCF c CDEF Responds with a NR1 indicating if the voltage crest factor was outside of the requirements of EN50564 at any time during the measurement responds with 1 or not responds with 0 STBYVTHD c CDEF Responds with a NR1 indicating if the voltage distortion was outside of the requirements of EN50564 at any time during the mea...

Page 155: ...Type KEYWORD DC Data is the DC component AC Data is the AC component ACDC or RMS Data is the ACDC component COUPLED DEFAULT if no other Measurement Type sub field found Data is the DC AC or ACDC component as COUPLING setting RECTIFIED Data is the average rectified ACDC STBY Data is the average standby power measurement ACDC STBYMIN Data is the minimum standby power measurement ACDC STBYMAX Data is...

Page 156: ... Hn n VOLTS An pX Pn VOLTS An pX THDf VOLTS An pX THDsig VOLTS An pX n VOLTS An pX n n VOLTS An pAC AC VOLTS An pAC ACDC VOLTS An pAC VOLTS An pAC RECTIFIED VOLTS An pAC FF VOLTS An pAC CF VOLTS An pAC PK VOLTS An pAC HIPK VOLTS An pAC LOPK VOLTS An pAC INRUSH VOLTS An pAC INRUSHPK VOLTS An pAC INTEG VOLTS An pAC INTAVG VOLTS An pAC BOUGHT VOLTS An pAC SOLD VOLTS An pAC Hn VOLTS An pAC Hn n VOLTS ...

Page 157: ...AR An pAC SOLD VAR An pBC AC VAR An pBC ACDC VAR An pBC VAR An pBC H1 VAR An pBC INTEG VAR An pBC INTAVG VAR An pBC BOUGHT VAR An pBC SOLD VAR An AC VAR An ACDC VAR An VAR An H1 VAR An INTEG VAR An INTAVG VAR An BOUGHT VAR An SOLD VA CHn DC VA CHn AC VA CHn ACDC VA CHn VA CHn H1 VA CHn INTEG VA CHn INTAVG VA CHn CHARGE VA CHn DISCHARGE VA CHn BOUGHT VA CHn SOLD VA An pX DC VA An pX AC VA An pX ACD...

Page 158: ...MS Data is the ACDC component COUPLED DEFAULT if no other Measurement Type sub field found Data is the DC AC or ACDC component as configured for the VPA CF Data is the crest factor ACDC PK Data is peak ACDC VALLEY Data is valley peak PK VLY Data is the difference between peak and valley peak HIPK Data is the highest peak including polarity ACDC coupled LOPK Data is the lowest peak including polari...

Page 159: ... pX P1 AMPS An pX THDf AMPS An pX THDsig AMPS An pN DC AMPS An pN AC AMPS An pN ACDC AMPS An pN AMPS An pN CF AMPS An pN PK AMPS An pN H1 AMPS An AMPS An PK AMPS An H1 WATTS CHn DC WATTS CHn AC WATTS CHn ACDC WATTS CHn WATTS CHn H1 WATTS An pX DC WATTS An pX AC WATTS An pX ACDC WATTS An pX WATTS An pX H1 WATTS An pAC DC WATTS An pAC AC WATTS An pAC ACDC WATTS An pAC WATTS An pAC H1 WATTS An pBC DC...

Page 160: ...d for each signal within each measurement period are recorded as the highest and lowest peak measurement results Lowest half cycle valley The largest of all samples obtained for each signal within each half cycle of the fundamental period is recorded the smallest of these recorded half cycle samples within each measurement period is recorded as the signal valley measurement results Other non harmo...

Page 161: ... any harmonic including the fundamental over 500Hz The nominal sampling period for the channel types are as follows this does not limit the HF amplitude performance of the XT2640 L S or A types 245KSPS W type 910KSPS Each actual sampling period is controlled with 2 5ps average resolution and 2 6ns incremental resolution with a quasi random distribution of incremental sample periods within a range ...

Page 162: ...omponents from creating false zero crossing detections Because the filtering is band pass the frequency is established regardless of any DC signal content The low frequency corner of the band pass filter is set by the LF PERIOD setting for the VPA The high frequency corner of the band pass filter is continuously adjusted to match the measured frequency The maximum corner frequency of this filter i...

Page 163: ...tts for the channels in the VPA VPA total VAR and VA is computed according to the method selected in the configuration for that VPA VPA overall lead lag is taken from the polarity of the sum of the channel VAR for the VPA The total Watts for an efficiency group is the sum of the VPA total Watts for each VPA configured by the EFF LOSS setting to be in the requested group 25 7 INTEGRATED DATA At the...

Page 164: ...essment of a EUT when installed with option H500 This option is available for any channel types is field installable does not require removal of the XT2640 covers and does not affect calibration of the XT2640 contact XiTRON for details 26 3 ACCESSORY RM 7 This accessory provides a rack mounting kit which allows the XT2640 to be mounted in a 4U 7 space in a 19 rack 26 4 ACCESSORY 280X IEC ADAPTOR C...

Page 165: ...h feet not extended Nominal Weight 3 2kg 7lb net 5kg 11lb shipping 27 2 ENVIRONMENTAL Storage Environment 20 to 75C 4 to 167F non condensing Operating Environment 0 to 40C 32 to 104F 85 RH non condensing Pollution Degree 2 Operating Altitude 0 to 2000m 6560ft ASL 27 3 POWER SUPPLY Line Power Installation Category II 85 264Vrms 45 to 65Hz 40VA max Internally fused with a non user serviceable fuse ...

Page 166: ...he maximum measurable level shown is a typical value the actual measurable maximum level is within 2 of that shown The Specified input signal range is that of continuously applied signal levels for which measurements are guaranteed to be within the specified accuracies The RMS level is also the maximum rated working signal level for safety purposes Accuracy specifications are guaranteed maximum er...

Page 167: ...ode is present Following the charts is a table which can be used to calculate the guaranteed accuracies for applications other than shown in the charts and also for the computation of numerical errors 0 01 0 10 1 00 1 10 100 1 000 DC Voltage Accuracy L Channel S Channel A Channel W Channel 0 01 0 10 1 00 1 10 100 1 000 MAINS Voltage Accuracy L Channel S Channel A Channel W Channel 0 01 0 10 1 00 1...

Page 168: ... 125mV 125mV 17mV 175mV Common Mode Error Apply to AC AC DC and RECTIFIED results Apply using voltage on V LO terminal relative to chassis ground Error has 90 phase shift to common mode voltage 1µV per V Hz 11 5mV 230V 50Hz 100nV per V Hz 1 15mV 230V 50Hz 700nV per V Hz 8 05mV 230V 50Hz Adjacent Channel Error Apply to AC AC DC and RECTIFIED results Apply using adjacent channel A LO or V LO termina...

Page 169: ...f a measurement of a 10 THD of a 230Vrms voltage at 50Hz when 50 harmonics are configured is a worst case of 0 10 as calculated by 0 005 0 000025 N THD 0 005 0 000025 50 10 0 0625 THD 0 00005 N N 0 00005 50 50 0 0177 THD 0 015 1 VAC 0 015 1 230 0 0193 THD Example 4 For an A type channel the maximum error of the inter channel voltage fundamental phase at 50Hz is a worst case of 0 02 0 15 0 05 0 021...

Page 170: ...s present Following the charts is a table which can be used to calculate the guaranteed accuracies for applications other than shown in the charts and also for the computation of numerical errors 0 01 0 10 1 00 0 0001 0 001 0 01 0 1 1 10 DC Current Accuracy LH or AH SH WH LD or AD SD WD 0 01 0 10 1 00 0 0001 0 001 0 01 0 1 1 10 MAINS Current Accuracy LH or AH SH WH LD or AD SD WD 0 01 0 10 1 00 0 ...

Page 171: ...LO 0 01 0 10 1 00 0 0001 0 001 0 01 0 1 1 10 MAINS Current Accuracy X Option L or AX HI S X HI WX HI L or AX LO SX LO WX LO 0 01 0 10 1 00 0 0001 0 001 0 01 0 1 1 10 AVIONICS Current Accuracy X Option L or AX HI S X HI WX HI L or AX LO SX LO WX LO 0 10 1 00 10 00 0 0001 0 001 0 01 0 1 1 10 50kHz Current Accuracy X Option L or AX HI S X HI WX HI L or AX LO SX LO WX LO ...

Page 172: ...el Type Option H Option D HI Range Option D LO Range Option X HI Range Option X LO Range Base Floor Error Apply to all results A or L 56µA 38µA 250nA 6µV 150nV S or W 225µA 150µA 1µA 23µV 600nV DC Floor Error Apply to DC and RECTIFIED results Apply to AC DC results after multiplying by ADC AAC DC A or L 0 23mA 0 15mA 1µA 40µV 5µV S 0 45mA 0 3mA 2µA 80µV 6µV W 0 68mA 0 45mA 3µA 120µV 8µV AC Floor E...

Page 173: ...25 AAC 0 015 0 0006 AAC 10k 115kHz 0 15 2 AAC 0 15 1 5 AAC 0 15 0 01 AAC 0 15 0 25 AAC 0 15 0 006 AAC 10kHz S 0 025 0 2 AAC 0 025 0 15 AAC 0 025 0 001 AAC 0 025 0 025 AAC 0 025 0 0006 AAC 10k 115kHz 0 15 2 AAC 0 15 1 5 AAC 0 15 0 01 AAC 0 15 0 25 AAC 0 15 0 006 AAC 10kHz W 0 03 0 25 AAC 0 03 0 18 AAC 0 03 0 0012 AAC 0 03 0 03 AAC 0 03 0 001 AAC 10k 115kHz 0 06 2 5 AAC 0 06 1 8 AAC 0 06 0 012 AAC 0...

Page 174: ... available using a D option current measurement H and X option current accuracies are similar within their respective range of currents and are not shown for clarity expressed as of Watts reading and are valid within 5C of the calibration temperature add 0 005 per C beyond this and where no significant common mode is present Following the charts is a table which can be used to calculate the guaran...

Page 175: ...ng Manual 13 July 2016 Page 175 of 187 0 01 0 10 1 00 10 00 0 01 0 1 1 10 100 1000 10000 100000 1000000 Hz Watts Error vs Frequency 240V 1A PF 0 3 and 1 D or H options A PF 1 S PF 1 W PF 1 A PF 0 3 S PF 0 3 W PF 0 3 ...

Page 176: ...n D LO Range Option X HI Range Option X LO Range Base Floor Error Apply to all results L VAC DC 56µA AAC DC 45µV VAC DC 38µA AAC DC 45µV VAC DC 250nA AAC DC 45µV VAC DC 6µA AAC DC 45µV VAC DC 0 15µA AAC DC 45µV A VAC DC 56µA AAC DC 450µV VAC DC 38µA AAC DC 450µV VAC DC 250nA AAC DC 450µV VAC DC 6µA AAC DC 450µV VAC DC 0 15µA AAC DC 450µV S or W VAC DC 225µA AAC DC 1 8mV VAC DC 150µA AAC DC 1 8mV V...

Page 177: ...negligible Total Floor Errors 9 255mW 0 0013 of reading Example 2 For an AD channel HI range the maximum error of a measurement of the AC DC Watts at 240Vrms 3Arms PF 0 5 caused by load distortion 50Hz is a worst case of 0 052 of reading as calculated by Scaling Errors Base Scaling 0 045 Frequency Dependent Scaling None at MAINS Self heating Scaling 0 05 240V 1000 2 0 0002 32 0 0029 0 0018 0 0047 ...

Page 178: ... VAC DC 3µA AAC DC 5mV VAC DC 120µA AAC DC 5mV VAC DC 8µA AAC DC 5mV VAC DC Phase Error Apply to all PF results S A or L PFFUND cos cos 1 PFFUND 0 015 F Alternately as a worst case at PF 0 this can expressed as F 0 00028 W PFFUND cos cos 1 PFFUND 0 007 F Alternately as a worst case at PF 0 this can expressed as F 0 00013 28 5 1 1 EXAMPLES Example 1 For an AD channel HI range the maximum error of a...

Page 179: ...Vrms W S or A channel type or 75mVrms L channel type at fundamental Current H option 0 05Arms at fundamental Current D option 0 04Arms HI range or 0 3mArms LO range at fundamental Current X option 5mVrms HI range or 150µVrms LO range at fundamental Min Pulse Width typical Greater of 1 25µs W channel type or 5µs other channel types 0 001 of measurement period 10 of signal period Update Period nomin...

Page 180: ...s read with 1mV resolution then use 19mV as the maximum error All percentages are of reading unless otherwise described 29 1 INPUT CAPABILITIES AND CHARACTERISTICS Input Terminals SPD Speed BNC isolated from XT2640 chassis configurable as analog or digital input TRQ Torque BNC isolated from XT2640 chassis configurable as analog or digital input DIR Direction BNC isolated from XT2640 chassis digita...

Page 181: ...f a The smaller of fundamental frequency or 2 LF PERIOD measurement period b If FUND set to AVIONICS 20Hz c Fundamental Frequency Maximum Harmonic 2250 Measurement Period Nominally 1 Harmonic Bandwidth Update Interval Nominally the greater of a LF PERIOD measurement period b Harmonic Measurement Period from above c 0 25ms x Σ Maximum Harmonic for each channel configured for harmonics Data Availabl...

Page 182: ... XT2640 detecting events All events are captured The greater of a 1 pixel of displayed data front panel or 1 increment of the requested time interval interface b 1 measurement period of the data being recorded c A maximum of 1 4096th of the elapsed historical data collection time typically 1 8192th Data Capture Every measurement is included in the maximum average and minimum data for each incremen...

Page 183: ...and A channel types A source of AC voltages into a 1 2Mohm load S or A channel types or 400Kohm load W channel types of 10V 20V and 200Vrms at a frequency of between 45 and 450Hz the use of 50Hz or 60Hz is recommended with sufficient amplitude accuracy to ensure the desired ratio between the specified XT2640 accuracy and that of the applied voltage For a 4 1 TUR typically used the voltage source s...

Page 184: ...e IP address of the XT2640 This can be seen by pressing the LAN info area on the XT2640 screen 4 Press the CONNECT button this will then be relabeled DISCONNECT and the identification of the XT2640 will be shown underneath the button after the application has correctly established communications with the XT2640 This shows the model number any installed option contents the serial number and the mai...

Page 185: ...For step 3 of the X current option adjustment it is recommended to wait at least 1 minute for any thermals to have dissipated before pressing the FINISH ADJUSTMENT STEP button iv You should be aware of the XT2640 specifications for the channel and step being adjusted Using this will assist you in determining if you are satisfied with the adjustment or not In some steps the last digit is not trimme...

Page 186: ...ton at any time during the adjustment of a channel will discard any adjustments made to that channel until the SAVE ADJUSTMENTS button is pressed 31 2 3 FINISHING THE PROCEDURE When all adjustments have been performed on all channels requiring adjustment the user may press the DISCONNECT button to disconnect the application from the XT2640 The adjustments were saved when each channel adjustment wa...

Page 187: ...XT2640 Operating Manual 13 July 2016 Page 187 of 187 32 CALIBRATION VERIFICATION To be determined ...

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