XITRON XT2640 User manual
XT2640OperatingManual 13July2016 Page1of187
XT2640
PRECISIONMULTI‐CHANNELHARMONICPOWERANALYZER
OPERATINGMANUAL
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1ABOUTTHISMANUAL...........................................................................................................................................................................................7
2WARRANTYINFORMATION................................................................................................................................................................................8
3PRODUCTFEATURES............................................................................................................................................................................................9
4SAFETY....................................................................................................................................................................................................................11
4.1SAFETYSPECIFICATIONS............................................................................................................................................................................................................11
4.2POWERANDGROUNDING...........................................................................................................................................................................................................11
4.3TERMINALSANDWIRING...........................................................................................................................................................................................................11
4.4ENVIRONMENT............................................................................................................................................................................................................................11
5INSPECTION..........................................................................................................................................................................................................12
6FRONTANDREARPANELLAYOUT................................................................................................................................................................13
6.1FRONTPANELLAYOUT..............................................................................................................................................................................................................13
6.2REARPANELLAYOUT.................................................................................................................................................................................................................13
7GETTINGSTARTED.............................................................................................................................................................................................14
8APPLICATIONS.....................................................................................................................................................................................................16
8.1CHANNELS...................................................................................................................................................................................................................................16
8.1.1ElectricalChannels.................................................................................................................................................................................................................16
8.1.2MechanicalChannel...............................................................................................................................................................................................................16
8.2VIRTUALPOWERANALYZERS(ORVPA)................................................................................................................................................................................16
8.3TYPICALSINGLEVPAAPPLICATIONS......................................................................................................................................................................................17
8.4TYPICALDUALVPAAPPLICATIONS.........................................................................................................................................................................................18
8.5TYPICALTRIPLEVPAAPPLICATIONS......................................................................................................................................................................................19
8.6MECHANICAL(MOTOR/GENERATOR)APPLICATIONS...........................................................................................................................................................19
9WIRINGTOCHANNELS......................................................................................................................................................................................20
9.11ØWIRINGUSINGINTERNALCURRENTMEASUREMENT.......................................................................................................................................................20
9.21ØWIRINGUSINGEXTERNALCURRENTMEASUREMENT......................................................................................................................................................21
9.31ØWIRINGUSING280XIECADAPTORCORD.................................................................................................................................................................22
9.42Ø3WOR3Ø3W(2CH)WIRINGUSINGINTERNALCURRENTMEASUREMENT....................................................................................................................23
9.52Ø3WOR3Ø3W(2CH)WIRINGUSINGEXTERNALCURRENTMEASUREMENT...................................................................................................................24
9.63Ø3W(3CH)OR3Ø4WWIRINGUSINGINTERNALCURRENTMEASUREMENT....................................................................................................................25
9.73Ø3W(3CH)OR3Ø4WWIRINGUSINGEXTERNALCURRENTMEASUREMENT...................................................................................................................26
9.8MECHANICAL(MOTOR)MEASUREMENTWIRING..................................................................................................................................................................26
9.8.1MechanicalSpeedandDirectionInputs........................................................................................................................................................................27
9.8.2MechanicalTorqueInputs...................................................................................................................................................................................................27
10POWERINGTHEXT2640..............................................................................................................................................................................28
10.1TURNINGPOWERON.................................................................................................................................................................................................................28
10.2TURNINGPOWEROFF................................................................................................................................................................................................................28
11MEASUREMENTRESULTTERMINOLOGY................................................................................................................................................29
11.1WIRINGPHASEINDICATIONS....................................................................................................................................................................................................29
11.2LEADING/LAGGINGDETERMINATION......................................................................................................................................................................................29
11.3PEAKANDVALLEYRESULTS.....................................................................................................................................................................................................29
11.4INDIVIDUALCHANNELRESULTS...............................................................................................................................................................................................29
11.5INDIVIDUALVPATOTALRESULTS...........................................................................................................................................................................................30
11.5.1VoltageResults....................................................................................................................................................................................................................30
11.5.2WyeVoltageResult...........................................................................................................................................................................................................30
11.5.3DeltaVoltageResult.........................................................................................................................................................................................................30
11.5.4CurrentResults....................................................................................................................................................................................................................30
11.5.5WattsResults.......................................................................................................................................................................................................................30
11.5.6VARandVAResults...........................................................................................................................................................................................................30
11.5.7PowerFactorResults........................................................................................................................................................................................................30
11.6INRUSHRESULTS........................................................................................................................................................................................................................30
11.7PHASERESULTS..........................................................................................................................................................................................................................30
11.7.1Non‐HarmonicPhaseResults.......................................................................................................................................................................................31
11.7.2HarmonicPhaseResults..................................................................................................................................................................................................31
11.8RELATIVEINDIVIDUALHARMONICSRESULTS.........................................................................................................................................................................31
11.9PERCENTAGEDISTORTIONRESULTS........................................................................................................................................................................................31
11.10THC,POHCANDPWHCRESULTS...................................................................................................................................................................................31
11.11MECHANICAL(MOTOR)RESULTS.......................................................................................................................................................................................31
12OPERATINGFROMTHEFRONTPANEL...................................................................................................................................................32
12.1TOUCHPANEL.............................................................................................................................................................................................................................32
12.1.1Buttons...................................................................................................................................................................................................................................32
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12.2MAINSCREENLAYOUT..............................................................................................................................................................................................................32
12.2.1MainScreenSelectButtons...........................................................................................................................................................................................32
12.2.2RemoteButton....................................................................................................................................................................................................................33
12.2.3PowerButton.......................................................................................................................................................................................................................33
12.2.4DataArea..............................................................................................................................................................................................................................33
12.2.5ErrorInfoArea....................................................................................................................................................................................................................33
12.2.6HoldingorReleasingMeasurements.........................................................................................................................................................................33
12.2.7IntegrationInfoArea.......................................................................................................................................................................................................34
12.2.8USBDriveInfoArea..........................................................................................................................................................................................................34
12.2.9InterfaceInfoArea............................................................................................................................................................................................................34
12.2.10TimeandDateInfoArea.................................................................................................................................................................................................34
12.3SYSTEMCONFIGURATIONANDVIEWINGBUILDINFORMATION–THESYSCONFIGSCREEN.........................................................................................34
12.3.1SettingPowerandMeasurementUserPreferences............................................................................................................................................35
12.3.2ConfiguringtheInterface...............................................................................................................................................................................................37
12.3.3SettingtheClockandTime/DateFormats.............................................................................................................................................................39
12.3.4UpgradingtheXT2640OptionContent....................................................................................................................................................................39
12.4CONFIGURINGMEASUREMENTS–THEMEASCONFIGSCREEN........................................................................................................................................39
12.4.1SelectingtheOverallMeasurementMode...............................................................................................................................................................39
12.4.2ConfiguringaVPA.............................................................................................................................................................................................................40
12.4.3ConfiguringMechanicalMeasurements(MotororGenerator).....................................................................................................................44
12.4.4Importing,ExportingorRecordingtheMeasurementConfiguration........................................................................................................46
12.5VIEWINGNUMERICALMEASUREMENTS–THEPOWERDATASCREEN...........................................................................................................................47
12.5.1ViewingMeasurementResultsforanIndividualChannel...............................................................................................................................47
12.5.2ViewingMeasurementResultsforaVPA.................................................................................................................................................................49
12.5.3ViewingEfficiencyandPowerLossMeasurementResults...............................................................................................................................51
ViewingMechanicalMeasurementResults...................................................................................................................................................................................52
ExportingorRecordingMeasurements..........................................................................................................................................................................................52
12.6VIEWINGCUSTOMNUMERICALMEASUREMENTS–THECUSTOMDATASCREEN.........................................................................................................53
12.7VIEWINGHARMONICSMEASUREMENTS–THEHARMONICSSCREEN.............................................................................................................................53
12.7.1UsingtheNumericalListing..........................................................................................................................................................................................54
12.7.2ComparingHarmonicsAgainstLimits......................................................................................................................................................................55
12.7.3ExportingorRecordingHarmonics...........................................................................................................................................................................55
12.8VIEWINGFUNDAMENTALSIGNALVECTORS‐THEVECTORSSCREEN...............................................................................................................................56
12.8.1RecordingVectors..............................................................................................................................................................................................................56
12.9GRAPHICALLYVIEWINGPASTMEASUREMENTS–THEHISTORYSCREEN........................................................................................................................57
12.9.1SelectingandConfiguringtheTracestoShow.....................................................................................................................................................57
12.9.2ChangingthewayinwhichtimeisdisplayedontheChart.............................................................................................................................58
12.9.3Starting,Stopping,andRestartingtheChart........................................................................................................................................................58
12.9.4ProhibitingDataCollectionTemporarily................................................................................................................................................................58
12.9.5UsingtheCursorandZoomingtheChart................................................................................................................................................................58
12.9.6RescalingtheChartTraces............................................................................................................................................................................................59
12.9.7ExportingorRecordingHistory...................................................................................................................................................................................59
12.9.8HistoricalDataAvailability...........................................................................................................................................................................................60
12.10USINGTHEXT2640ASANOSCILLOSCOPE–THESCOPESCREENS.............................................................................................................................61
12.10.1ViewingPeriodicWaveforms–theCYCLEVIEWScreen..................................................................................................................................61
12.10.2AnOscilloscope–theSCOPEVIEWScreen.............................................................................................................................................................63
12.11PERFORMINGEN50564LOWPOWERMEASUREMENTS–THESTBYPOWERSCREEN.........................................................................................67
12.12PERFORMINGEN61000‐3‐2OR‐12ASSESSMENTS–THEASSESSEUTSCREEN..................................................................................................67
12.13PERFORMINGANDVIEWINGASPECTRUMANALYSIS–THESPECTRUMSCREEN......................................................................................................67
12.13.1ConfiguringSpectrumAnalysis....................................................................................................................................................................................67
12.13.2OptimisingConfigurationforSpectrumMeasurements...................................................................................................................................67
12.13.3HoldingMeasurementsWhilePerformingSpectrumAnalysis......................................................................................................................68
12.13.4ViewingSpectrumAnalysisResults............................................................................................................................................................................68
12.13.5ExportingorRecordingSPECTRUMData...............................................................................................................................................................68
13OPTIMIZINGLOW‐LEVELDCPERFORMANCE.......................................................................................................................................70
13.1INTERNALDCZEROADJUSTMENT...........................................................................................................................................................................................70
13.2EXTERNALDCZEROADJUSTMENT..........................................................................................................................................................................................70
13.3USINGANXCURRENTOPTIONINPUTATLOWLEVELS.........................................................................................................................................................70
14PERFORMINGSTARTUPORINRUSHMEASUREMENTS......................................................................................................................71
14.1OBTAININGAGRAPHICALANDNUMERICALINRUSHCURRENTMEASUREMENT................................................................................................................71
14.2OBTAININGANUMERICALINRUSHCURRENTMEASUREMENT.............................................................................................................................................73
14.3RECORDINGINRUSHDATA........................................................................................................................................................................................................74
15INTEGRATINGDATA......................................................................................................................................................................................75
15.1CONFIGURINGINTEGRATION.....................................................................................................................................................................................................75
15.1.1SelectingtoPerformManuallyTimedIntegration.............................................................................................................................................75
15.1.2SelectingtoPerformanAutomaticallyTimedIntegration.............................................................................................................................75
15.2STARTINGANDSTOPPINGINTEGRATION.................................................................................................................................................................................76
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15.3EXPORTINGORRECORDINGINTEGRATEDMEASUREMENTS..................................................................................................................................................76
16PERFORMINGMEASUREMENTSOFPWMGENERATEDSIGNALS....................................................................................................78
16.1CHOICEOFCHANNELS................................................................................................................................................................................................................78
16.2WIRINGRECOMMENDATIONS...................................................................................................................................................................................................78
16.2.1Recommended3‐phase,3‐wireWiringMethodSelection................................................................................................................................78
16.3CONFIGURATIONRECOMMENDATIONS.....................................................................................................................................................................................79
16.3.1RecommendedFREQSPEEDSystemPreference..................................................................................................................................................79
16.3.2RecommendedMEASCONFIGSettings.....................................................................................................................................................................79
16.3.3PWMGeneratorEfficiencyMeasurements.............................................................................................................................................................80
17PERFORMINGEN50564LOWPOWERMEASUREMENTS...................................................................................................................82
17.1.1VPAMeasurementConfigurationforEN50564:2011Measurements........................................................................................................82
17.1.2LowPowerMeasurementConfiguration.................................................................................................................................................................83
17.1.3PerformingaLowPowerMeasurementandViewingtheResults................................................................................................................85
17.1.4RecordingSTBYPOWERData......................................................................................................................................................................................86
18TESTINGCOMPLIANCETOHARMONICSEMISSIONSSTANDARDS..................................................................................................87
18.1STANDARDSCOMPLIANCE.........................................................................................................................................................................................................87
18.1.1RelevantStandards...........................................................................................................................................................................................................87
18.1.2Supply,XT2640andEUTWiring.................................................................................................................................................................................88
18.1.3RepeatabilityRequirements..........................................................................................................................................................................................89
18.1.4EUTClassificationsandLimitsSelection.................................................................................................................................................................89
18.1.5RangeofXT2640MeasurementsforCompliance................................................................................................................................................90
18.1.6ComplianceTestsPerformedbytheXT2640DuringAssessment.................................................................................................................92
18.2CONFIGURINGTHEXT2640FOREN61000‐3‐2OR‐12MEASUREMENTS.....................................................................................................................93
18.3USINGTHEOTHERRESULTSSCREENS.....................................................................................................................................................................................94
18.3.1UsingtheHARMONICSScreen......................................................................................................................................................................................94
18.4PERFORMINGANASSESSMENTOFAEUT................................................................................................................................................................................94
18.4.1SelectingtheChanneltoViewResults......................................................................................................................................................................94
18.4.2SelectingHowtheLimitsReference(s)areObtained.........................................................................................................................................95
18.4.3ConfiguringandStartinganAssessment................................................................................................................................................................95
18.4.4ViewingtheResultsofanAssessment.......................................................................................................................................................................97
18.4.5ChangingtheConfigurationandReassessingtheEUT...................................................................................................................................100
18.4.6ContinuingaPausedAssessment.............................................................................................................................................................................100
18.4.7StoppinganAssessment...............................................................................................................................................................................................100
18.4.8RecordingtheResultsofanAssessment...............................................................................................................................................................100
19MEASURINGELECTRICALPOWERTOEN60034‐2‐1REQUIREMENTS........................................................................................104
20MEASURINGELECTRICALPOWERTOAVIONICSREQUIREMENTS...............................................................................................106
20.1CONNECTINGTHEXT2640...................................................................................................................................................................................................106
20.2CONFIGURINGTHEMEASUREMENTSMADEBYTHEXT2640............................................................................................................................................106
20.2.1AC3‐phaseSupplies.......................................................................................................................................................................................................106
20.2.2AC1‐phaseSupplies.......................................................................................................................................................................................................107
20.2.3DCSupplies........................................................................................................................................................................................................................108
20.3USINGTHEXT2640TOMONITORTHESUPPLY..................................................................................................................................................................108
20.3.1ConfirmingtheVoltageandFrequencyoftheSupply.....................................................................................................................................108
20.3.2ConfirmingtheVoltageModulationDepthoftheSupply..............................................................................................................................108
20.3.3ConfirmingtheDCVoltageContentoftheSupply............................................................................................................................................109
20.3.4ConfirmingtheVoltageDistortionoftheSupply..............................................................................................................................................109
20.3.5ConfirmingtheVoltageRippleContentoftheSupply.....................................................................................................................................109
20.4USINGTHEXT2640TOTESTCOMPLIANCETOLOADINGREQUIREMENTS......................................................................................................................109
20.4.1TestingtheLoadCurrentDistortionMeetsRequirements...........................................................................................................................110
20.4.2TestingtheLoadPhaseImbalanceMeetsRequirements..............................................................................................................................110
20.4.3TestingtheLoadDCCurrentContentMeetsRequirements.........................................................................................................................110
20.4.4TestingtheLoadInrushCurrentMeetsRequirements...................................................................................................................................110
20.4.5TestingtheLoadCurrentModulationMeetsRequirements........................................................................................................................111
20.4.6TestingtheLoadPowerFactorMeetsRequirements......................................................................................................................................111
21SHARINGMEASUREMENTSANDACTIVITIESWITHINMULTIPLEINSTRUMENTS..................................................................112
21.1INTERCONNECTINGMULTIPLEXT2640S............................................................................................................................................................................112
21.1.1InterconnectingNotUsingtheLANInterfacewithaComputer................................................................................................................112
21.1.2InterconnectingWhileAlsoUsingtheLANInterfaceswithaComputer................................................................................................112
21.1.3HavingSeveralGroupsofXT2640sWithinaSingleNetwork.....................................................................................................................112
21.2CONFIGURINGMULTI‐UNITCAPABILITY..............................................................................................................................................................................112
21.3SYNCHRONIZINGMEASUREMENTSWITHINAGROUPOFUNITS........................................................................................................................................113
21.4HOLDINGANDRELEASINGMEASUREMENTSINAGROUPOFUNITS..................................................................................................................................113
21.5STARTING,STOPPINGANDCONFIGURINGINTEGRATIONINAGROUPOFUNITS..............................................................................................................113
21.6STARTINGANDSTOPPINGHISTORICALDATACOLLECTIONINAGROUPOFUNITS.........................................................................................................113
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21.7IN,MIDANDOUTTOTALPOWERANDEFFICENCYDATAINAGROUPOFUNITS..........................................................................................................114
22SYNCHRONIZINGMEASUREMENTSBETWEENVPAS........................................................................................................................115
23USINGAUSBDRIVE......................................................................................................................................................................................117
23.1DRIVECOMPATIBILITY............................................................................................................................................................................................................117
23.2CHECKINGDRIVECOMPATIBILITY.........................................................................................................................................................................................117
23.3FILES.........................................................................................................................................................................................................................................118
23.4CHECKINGTHEDRIVEFILESTRUCTURE...............................................................................................................................................................................118
23.5EXPORTINGFILESTOADRIVE................................................................................................................................................................................................118
23.5.1ScreenImageFile(.BMPExtension).......................................................................................................................................................................119
23.5.2Binary(.CFGExtension)Files.....................................................................................................................................................................................119
23.5.3CommaSeparatedValue(.CSVExtension)Files................................................................................................................................................119
23.6IMPORTINGFILESFROMADRIVE...........................................................................................................................................................................................122
23.6.1ImportingBinaryConfiguration,CustomScreenandHarmonicLimitsFiles......................................................................................122
23.6.2CreatingandImportinganASCIIHarmonicsLimitsFile..............................................................................................................................123
23.6.3CreatingandImportinganASCIICustomScreenDefinitionFile..............................................................................................................123
23.6.4UpdatingtheFirmwareortheFPGA......................................................................................................................................................................125
23.6.5ChangingtheWelcomingScreen.............................................................................................................................................................................125
23.7DATALOGGING........................................................................................................................................................................................................................125
23.7.1ConfiguringtheDataLog............................................................................................................................................................................................126
23.7.2ConfiguringDataLoggingTiming..........................................................................................................................................................................127
23.7.3ConfiguringDataLoggingRecordContents.......................................................................................................................................................127
23.7.4StartingandStoppingDataLogging.....................................................................................................................................................................128
23.7.5ClearingtheDataFromaCompletedUnsavedDataLog..............................................................................................................................128
23.7.6ViewingDataLoggingStatus....................................................................................................................................................................................128
23.7.7ExportingaDataLogfromtheInternalMemory.............................................................................................................................................129
23.7.8InternalBufferUsage....................................................................................................................................................................................................129
23.7.9OptimizingandTestingFileWriteSpeed.............................................................................................................................................................129
24USINGTHEXT2640FROMANINTERFACE...........................................................................................................................................131
24.1COMPUTERCONTROLOFTHEXT2640................................................................................................................................................................................131
24.1.1RS232(Serial)Interface..............................................................................................................................................................................................131
24.1.2LAN(Ethernet)Interface.............................................................................................................................................................................................132
24.1.3USBInterface....................................................................................................................................................................................................................134
24.1.4GPIBInterface..................................................................................................................................................................................................................137
24.2COMMANDSYNTAX..................................................................................................................................................................................................................138
24.2.1SpecialCharacters..........................................................................................................................................................................................................138
24.2.2FieldswithinaCommand............................................................................................................................................................................................139
24.3RESPONSESTOCOMMANDS....................................................................................................................................................................................................140
24.3.1ResponseFields................................................................................................................................................................................................................140
24.4COMMANDKEYWORDSANDFIELDS......................................................................................................................................................................................141
24.4.1InterfaceClearCommands.........................................................................................................................................................................................141
24.4.2Local/RemoteStateControlCommands..............................................................................................................................................................141
24.4.3ErrorRegisterQueryCommands.............................................................................................................................................................................141
24.4.4UnitandChannelIdentificationQueryCommands..........................................................................................................................................142
24.4.5GPIBSpecificCommands.............................................................................................................................................................................................142
24.4.6DateandTimeControlandQueryCommands...................................................................................................................................................143
24.4.7SystemPreferencesSetandQueryCommands..................................................................................................................................................143
24.4.8MeasurementStateControlandQueryCommands.........................................................................................................................................144
24.4.9MeasurementConfigurationEditCommands....................................................................................................................................................145
24.4.10MeasurementConfigurationQueryCommands................................................................................................................................................149
24.4.11ConfigurationSaveandLoadCommands............................................................................................................................................................151
24.4.12HarmonicsLimitsConfigurationandConfigurationQueryCommands.................................................................................................152
24.4.13DCZeroControlandQueryCommands.................................................................................................................................................................152
24.4.14CustomScreenConfigurationandConfigurationQueryCommands.......................................................................................................152
24.4.15MeasurementResultsQueryCommands...............................................................................................................................................................153
24.5RDEFMEASUREMENTDEFINITIONFIELDSUB‐FIELDS....................................................................................................................................................154
24.6DDEFMEASUREMENTDEFINITIONFIELDSUB‐FIELDS....................................................................................................................................................157
25INSIDETHEXT2640.....................................................................................................................................................................................160
25.1GENERALMEASUREMENTMETHODS....................................................................................................................................................................................160
25.2CHANNELCIRCUITRY...............................................................................................................................................................................................................161
25.3SAMPLINGCONTROL...............................................................................................................................................................................................................161
25.4CHANNELMEASUREMENTS....................................................................................................................................................................................................161
25.5VPAMEASUREMENTS............................................................................................................................................................................................................162
25.5.1VPAFundamentalFrequency....................................................................................................................................................................................162
25.5.2VPAAmplitudeMeasurements..................................................................................................................................................................................162
25.6DATACOLLECTION..................................................................................................................................................................................................................162
25.7INTEGRATEDDATA..................................................................................................................................................................................................................163
25.8DATALOGGING........................................................................................................................................................................................................................163
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26OPTIONSANDACCESSORIES.....................................................................................................................................................................164
26.1OPTIONH500.........................................................................................................................................................................................................................164
26.2OPTIONEN..............................................................................................................................................................................................................................164
26.3ACCESSORYRM‐7...................................................................................................................................................................................................................164
26.4ACCESSORY280XIECADAPTORCORD.........................................................................................................................................................................164
26.5ACCESSORYHC‐7....................................................................................................................................................................................................................164
27DIMENSIONAL,ENVIRONMENTALANDPOWERSUPPLYSPECIFICATIONS...............................................................................165
27.1DIMENSIONAL..........................................................................................................................................................................................................................165
27.2ENVIRONMENTAL.....................................................................................................................................................................................................................165
27.3POWERSUPPLY........................................................................................................................................................................................................................165
28ELECTRICALCHANNELINPUTANDACCURACYSPECIFICATIONS................................................................................................166
28.1INPUTISOLATIONSPECIFICATIONS........................................................................................................................................................................................166
28.2VOLTAGEMEASUREMENTSPECIFICATIONS..........................................................................................................................................................................166
28.2.1VoltageInputCapabilityandCharacteristics....................................................................................................................................................166
28.2.2VoltageMeasurementAccuracy...............................................................................................................................................................................167
28.3CURRENTMEASUREMENTSPECIFICATIONS.........................................................................................................................................................................169
28.3.1CurrentInputCapabilityandCharacteristics....................................................................................................................................................169
28.3.2CurrentMeasurementAccuracy...............................................................................................................................................................................170
28.4WATTS,VARANDVAMEASUREMENTSPECIFICATIONS...................................................................................................................................................174
28.4.1Watts,VARandVAMeasurementSpecifications..............................................................................................................................................176
28.5POWERFACTORMEASUREMENTSPECIFICATIONS..............................................................................................................................................................178
28.5.1PFMeasurementAccuracyTable.............................................................................................................................................................................178
28.6FREQUENCYMEASUREMENTSPECIFICATIONS.....................................................................................................................................................................179
29MECHANICALCHANNELINPUTANDACCURACYSPECIFICATIONS(MTTYPE)........................................................................180
29.1INPUTCAPABILITIESANDCHARACTERISTICS.......................................................................................................................................................................180
29.2DIGITALINPUTMEASUREMENTSPECIFICATIONS................................................................................................................................................................180
29.3ANALOGINPUTMEASUREMENTSPECIFICATIONS................................................................................................................................................................180
30ANALYSISSPECIFICATIONS.......................................................................................................................................................................181
30.1INTEGRATIONSPECIFICATIONS..............................................................................................................................................................................................181
30.2HARMONICANALYSISSPECIFICATIONS.................................................................................................................................................................................181
30.3SPECTRUMANALYSISSPECIFICATIONS.................................................................................................................................................................................181
30.4CYCLEVIEWSPECIFICATIONS................................................................................................................................................................................................182
30.5SCOPESPECIFICATIONS...........................................................................................................................................................................................................182
30.6HISTORICALDATACOLLECTIONSPECIFICATIONS...............................................................................................................................................................182
30.7DATALOGGINGSPECIFICATIONS............................................................................................................................................................................................182
31CALIBRATIONADJUSTMENT.....................................................................................................................................................................183
31.1EQUIPMENTREQUIRED...........................................................................................................................................................................................................183
31.2ADJUSTMENTPROCEDURE......................................................................................................................................................................................................184
31.2.1StartingtheInterfacetotheXT2640.....................................................................................................................................................................184
31.2.2AdjustingEachChannelintheXT2640.................................................................................................................................................................184
31.2.3FinishingtheProcedure...............................................................................................................................................................................................186
32CALIBRATIONVERIFICATION...................................................................................................................................................................187
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1 ABOUTTHISMANUAL
Thisdocumentisformattedtobebestviewedonacomputerusingasuitablereaderapplicationratherthanbeingprintedonpaper
andthenread.Ifprinted,thenitshouldbeprintedusingcolor.
Thetableofcontentsis“clickable”.Youmayclickonanyoftheentriestogotothatsection.Thetableofcontentsisalsomade
availableasBookmarksforAdobeReaderorAcrobat,allowingyoutopermanentlydisplaythetableofcontentsalongsidethe
documentandnavigatebyclickingoneachsectionasneeded.
Thetypicaluserdoesnotneedtoreadtheentiremanual,itisrecommendedthatyoulookthroughthetableofcontentsandread
thosesectionswhichareapplicabletoyourintendedapplication.
ThisdocumentappliestotheXT2640havingamainfirmwarerevisionof1.0.21ornewer,theremaybedifferencesiftheXT2640
hasadifferentmainfirmwareversion.
DocumentnumberMO‐XT2640‐UG.RevX5
Print date: July 13, 2016
Copyright©2015XiTRONTechnologies,Inc.
Allrightsreserved.Nopartofthispublicationmaybereproduced,transmitted,transcribed,storedinaretrievalsystem,or
translatedintoanylanguageinanyformwithoutpriorwrittenconsentfromXiTRONTechnologies,Inc.Thisdocumentis
copyrightedandcontainsproprietaryinformation,whichissubjecttochangewithoutnotice.Theproductdisplaysandinstructional
textmaybeusedorcopiedonlyinaccordancewiththetermsofthelicenseagreement.
Intheinterestofcontinuedproductdevelopment,XiTRONTechnologies,Inc.reservestherighttomakechangesinthisdocument
andtheproductitdescribesatanytime,withoutnoticeorobligation.
XiTRONTechnologies,Inc.
ManufacturersofEngineering&ProductionTestEquipment
7507ConvoyCourt,
SanDiego,CA92111USA
Telephone:858‐530‐8099
Fax:858‐558‐8540
Web:www.xitrontech.com
Email:[email protected]
This Product was manufactured by XiTRON Technologies whose quality
management system is registered as being in conformity with ISO9001:2008.
XT2640OperatingManual 13July2016 Page8of187
2 WARRANTYINFORMATION
This XiTRON Technologies instrument is warranted against defects in material and workmanship for a period of
two years after the date of purchase. XiTRON Technologies agrees to repair or replace any assembly or component
(except batteries) found to be defective, under normal use, during the warranty period. XiTRON Technologies'
obligation under this warranty is limited solely to repairing any such instrument, which in XiTRON Technologies'
sole opinion proves to be defective within the scope of the warranty, when returned to the factory or to an
authorized service center. Transportation to the factory or service center is to be prepaid by the purchaser.
Shipment should not be made without prior authorization by XiTRON Technologies.
This warranty does not apply to any products repaired or altered by persons not authorized by XiTRON
Technologies or not in accordance with instructions provided by XiTRON Technologies. 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 secondary charges or consequential damages, and, in any event, XiTRON
Technologies' liability for breach of warranty under any contract or otherwise, shall not exceed the original
purchase price of the specific instrument shipped and against which a claim is made.
Any recommendations made by XiTRON Technologies or its representatives, for use of its products are based upon
tests believed to be reliable, but XiTRON Technologies makes no warranties of the results to be obtained. This
warranty is in lieu of all other warranties, expressed or implied and no representative or person is authorized to
represent or assume for XiTRON Technologies any liability in connection with the sale of our products other than
set forth herein.
Instrument Serial Number: _________________________________________
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3 PRODUCTFEATURES
Lowcostofownershipwith2yearpartsandlaborwarranty;2yearaccuracyspecsandrecommendedcalibrationcycle.Reliable
stateoftheartfullysolid‐statedesignwith2.9GIPsRISCprocessingandFPGAbasedsamplingcontrol
Large,high‐resolutioncolordisplayshowsallthedatayouwantwithaneasy‐to‐usetouchscreenuserinterfacetogetyouup
andtestinginnotime
Highestprecisionmeasurementswithindustry‐leadingnoisefloorandlinearityandupto100readingspersecondwithno
reductioninaccuracy(upto500/secwithreducedaccuracywithWtypechannels).
Extremelywidedynamicrangeallowssignalswithcrestfactorstoover100:1tobemeasuredwithfullaccuracywithouthaving
toreconfigure,andallowsrange‐lessoperation(withineachshunt)providingtrulygaplessmeasurementswithvaryingsignals
andisonelessthingforyoutoconfigureandworryabout
Allconfiguredmeasurementsarealwaysperformed,noneedtoreconfigureforspecificresults
MeasurementsoflowpowermeetingtherequirementsofEN50564:2011arebuiltintotheXT2640asstandard.Acomputeris
notneeded
HarmonicandSpectrumAnalysisofvoltage,currentandpoweronallfourchannelsforfrequenciesupto435kHz(Wtype
channels)or115kHz(S,LorAtypechannels).Harmonicanalysisofupto500harmonics(optionH500)or100harmonics
(standard).
RegulatoryharmonicsassessmentofEUTsisavailableasanoption(optionEN)totheapplicablerequirementsofEN61000‐3‐2,
EN61000‐3‐12andEN61000‐4‐7.TheEUTassessmentisbuilt‐intotheXT2640andnocomputerisrequired.Eachsetof
measurementsmadeduringanassessmentisabletobereassessedtoanyadditionalclassificationsrequired.
FrontPanelUSBDriveInterfaceforportableflashdrivesorharddiscdrives–
DatalogtoafileinCSVorbinaryformatsatupto500persecond
Exportatabulationofhistoricallysaveddata–needsnopriorknowledgeofthedatatoberecorded
Saveanimageofthescreen–greatforengineeringrecordkeeping
Importandexportconfigurations–greatforsharingaconfigurationbetweenunitsorhavingyourownconfiguration
Importandexportharmonicslimits–makesiteasytoswitchbetweendifferentharmonicsrequirements
ExportCSVformattabulationsofmeasurementresults,harmonics,spectrum,orscopewaveforms–makesgeneratingyour
ownreportseasywithoutmistakes
ExportCSVformatcompletetabulationsofEN61000‐3‐2and‐12assessments–makesgeneratingyourownreportseasy
withoutmistakes
Internalnon‐volatilememoryofover2Gbytesizeforhighspeeddataloggingatratesupto500persecond.
Nota“onesizefitsall”withtheextrapurchasecost,operatingcost,andreductioninperformancethatentails–youonlyhaveto
payforofthecapabilitiesandperformanceyouwant‐
Uptofourpowermeasurementchannelcardseachoffourdifferentchannelcardtypesinanycombinationinasingle
XT2640‐
S‐Provides0.1%accuracy,1MHzclassbandwidthand22bitsampling
A‐Providesworldclass0.03%accuracy,1MHzclassbandwidthand24bitsampling
L–SameastheAtypebutoptimizedforlowervoltageapplicationssuchasAC:DCandDC:DCpowersupplies
W‐Provides0.1%accuracy,5MHzclassbandwidthand22bitsampling
EachchannelcardtypeisavailablewithoneofthreecurrentinputoptionsinanycombinationinasingleXT2640‐
D–DualShunt(upto20Armscontinuousand150Apkinrushmeasurable,250Apkwithstand)inasingleinputterminal
pairwithresolutiondownto0.1µA–noneedtochangeterminals
H‐HighCurrent(upto30Armscontinuousand200Apkinrushmeasurable,300Apkwithstand)withresolutiondownto
10µA
X–ExternalCurrentTransducerorShuntInput(upto15Vrms)withresolutiondownto0.1µV
OptionalMTtypemotorchannelprovidesanalogordigitalspeed,directionandtorqueinputsformechanical
measurements.
UptothreedifferentVirtualPowerAnalyzers™(VPAs)maybeindependentlyconfiguredintheoneunitforinput/mid‐
point/outputpowerandefficiencytests‐thereisnoneedtointerconnectseparateunitsinordertomakesynchronousornon‐
synchronousgrouppowermeasurements.
MeasurementsineachVPAarefullyconfiguredinasinglescreenatthetouchofthescreen,nohuntingaroundforthe
configurationsettingyouneed.EachmaybeconfiguredasNx1ø(1to4ch),2ø3w(2ch),3ø3w(2ch),3ø3w(3ch)or3ø4w(3ch)
andeachVPAhastotallyindependentmeasurementconfiguration.
Achoiceofscreenstoviewthemeasurements,justonetouchtochangebetweenscreens‐
PowerDataScreen‐displaysV,A,W,VA,VARandPFdataforanysinglechannelorforagroupofchannels,ordisplays
loading(impedance,resistanceandcapacitance/inductance),ordisplaysmechanicalspeed,torque,powerandmotorslip
percentage,ordisplayspowerlossandefficiency.
CustomPowerDataScreen‐letsyouchoosethedatayouwantdisplayedinacolor,fontsizeandlocationyouwant,along
withanytextyoudefine
HarmonicBarChartScreen‐displaysharmonicswithflexiblyscaledbarchartsandalsoascrollabletextuallistingofboth
amplitudeandphaseresults,andharmonicscanbecheckedagainstusersuppliedlimitsforeachharmonicwithindividual
harmonicandoverallpass/failindications
SpectrumAnalysisScreen‐displayssignalspectralcontentwithausercursorforobtainingnumericallevels
XT2640OperatingManual 13July2016 Page10of187
VectorScreen‐displaysfundamentalvoltageandcurrentvectorswithuserdefinedcoloring
HistoryScreen–theunitautomaticallymaintainsacontinuoushistoricalrecordingofmeasurementdata–noconfiguration
needed.Anydatafromthisrecordmaybeviewedwithuserdefinedscaling,offsetandcolor,withausercursorforzooming
andobtainingnumericallevels
ScopeViewScreen‐anextremeresolutiondigitalscopetocaptureeventssuchasin‐rushcurrentwithoutinterferingwith
othermeasurements,withausercursorforzoomingandobtainingnumericallevels
CycleViewScreen‐displaysasinglecycleofthevoltageandcurrentperiodicwaveforms,jittersampledovermultiple
cycleswithineachmeasurementperiodgivingtimeresolutiondownto2.6ns–noconfigurationneeded
StandbyPowerScreen–allowsEN50564compliantlowpowermeasurementswithouttheneedforacomputer.
AssessEUTScreen–allowsEN61000‐3‐2and‐12assessmentsofcompliancewithouttheneedforacomputer.
Upto1000unitscanbeconfiguredinasinglemulti‐unitgrouptoprovidetotalefficiencyandpowerlossmeasurementsinthe
mostcomplexofsystemrequirements(requiresoptionMU).
Connectivity‐Ethernet,HighSpeedSerialandUSB(client),or(optional)GPIBcontrolinterfaces
Safety‐CEmarkcertifiedtoEN61010withcertifiedconformancetoCATI,II,IIIandIVmainsmeasurementapplications
XT2640OperatingManual 13July2016 Page11of187
4 SAFETY
4.1 SAFETYSPECIFICATIONS
GeneralSafety ConformstotherequirementsofEN61010‐1
MeasurementSafety EN61010‐1CATI1000V;CATII1000V;CATIII600V;CATIV300V(electricalchannelinputs)
TheusershouldbeawareofthesesafetywarningsatalltimeswhileusingtheXT2640.
THEXT2640MEASURESVOLTAGESANDCURRENTSWHICHMAYBELETHAL;UNSAFE
OPERATIONMAYRESULTINSEVEREINJURYORDEATH.
IFTHEXT2640ISUSEDINAMANNERNOTSPECIFIEDBYXITRONTHEPROTECTIONPROVIDED
BYTHEEQUIPMENTMAYBEIMPAIREDANDSAFETYMAYBECOMPROMISED.
4.2 POWERANDGROUNDING
THEXT2640ISINTENDEDTOBEPOWEREDFROMAPOWERCORDHAVINGAPROTECTIVE
GROUNDWIREWHICHMUSTBEINSERTEDINTOAPOWEROUTLETHAVINGAPROTECTIVE
GROUNDTERMINAL.IFTHEXT2640ISNOTPOWEREDFROMASUITABLEPOWERSOURCE,OR
ITISLIKELYTHATTHEPOWERCORDMAYBEREMOVEDFROMTHEXT2640WHENMAINS
SIGNALSAREAPPLIEDTOTHEMEASUREMENTTERMINALS,THENTHECHASSISGROUND
TERMINALLOCATEDNEARTHEPOWERENTRYCONNECTORONTHEREARPANELMUSTBE
PROTECTIVEGROUNDED.
DONOTREMOVETHEPOWERCORDFROMTHEXT2640ORFROMTHESOURCEOFPOWER
WHILEITISMEASURINGHIGHVOLTAGES.THISWILLREMOVETHEPROTECTIVEGROUND
FROMTHECHASSISOFTHEXT2640WHICHMAYRESULTINHAZARDOUSVOLTAGESBEING
ACCESSIBLETOTHEUSER.
4.3 TERMINALSANDWIRING
THEXT2640MEASURESVOLTAGESANDCURRENTSWHICHMAYBELETHAL,ENSURENO
VOLTAGEORCURRENTISPRESENTWHENCONNECTINGTOORDISCONNECTINGFROMTHE
TERMINALS.
THEUSERMUSTUSEWIREWHICHISRATEDFORTHEHIGHESTEXPECTEDVOLTAGEAND
CURRENTFORALLCONNECTIONSTOTHEXT2640.
4.4 ENVIRONMENT
THEXT2640SHOULDNOTBEUSEDINANENVIRONMENTWHERECONDUCTIVEPOLLUTIONCAN
OCCUR,E.G.INANOUTDOORENVIRONMENT.
IFTHEXT2640ISTRANSPORTEDBETWEENDIFFERINGENVIRONMENTSANDCONDENSATIONIS
SUSPECTED,THEUNITSHOULDREMAINUNPOWEREDFORSUFFICIENTTIMEFOR
CONDENSATIONTOHAVEDISSIPATED.IFTHEREISANYDOUBTTHENCONTACTXITRONFOR
ADVICE.
IFFLUIDSOROTHERCONDUCTIVEMATERIALSAREALLOWEDTOENTERTHEXT2640
ENCLOSURE,EVENIFNOTPOWERED,THENTHEXT2640SHOULDBEIMMEDIATELYTAKENOUT
OFOPERATIONANDSERVICEDASSAFETYMAYHAVEBEENCOMPROMISED.
XT2640OperatingManual 13July2016 Page12of187
5 INSPECTION
AftertheXT2640hasbeenshippedorotherwisehandledinanunknownmanner,youshouldvisuallyinspecttheXT2640for
damagebeforeattemptingtooperateit.Particularattentionshouldbetakentoensurethattherearenosignificantdentsorcracks
inanyoutersurfaces,therearenomarksorscratchesonthefrontpanelLCDtouchscreen,andthatallterminalsaresecurely
mountedtotheunitandarenotcrackedorsignificantlydirty.IfanyabnormalityisnotedthenitisrecommendedthattheXT2640
beservicedpriortobeingplacedintouse,assafetymayhavebeencompromised.
XT2640OperatingManual 13July2016 Page13of187
6 FRONTANDREARPANELLAYOUT
6.1 FRONTPANELLAYOUT
6.2 REARPANELLAYOUT
LCDSCREENANDTOUCHPANEL
USBDRIVECONNECTOR POWERINDICATOR
OFF:NoPowerApplied
RED:PowerApplied,XT2640Off
GREEN:XT2640On
CHANNELS(1TO4MAYBEFITTED) LANINTERFACE
USBINTERFACE
RS232INTERFACE
XT2640POWERENTRY
CHASSISGROUNDING
XT2640OperatingManual 13July2016 Page14of187
7 GETTINGSTARTED
1) ApplypowertotheXT2640.
a) AttachathreewirepowercordtothepowerentryconnectorontherearpaneloftheXT2640andattachtheotherend
toasuitablesourceofmains.
2) TurnONtheXT2640(dependingonhowtheXT2640haspreviouslybeenconfiguredthisstepmightnotbeneeded).
a) Pressandcontinuouslyholdanywhereonthefrontpanelscreenforatleast½asecond.Useyourfingertiporastylus;
donotuseapenorpencil.
3) Decidewhatyouneedtomeasure.
a) Seesection8fordetails.Fornow,justlookatthesingleVPAapplicationsandtacklethemorecomplexapplications
later.AVPAisaVirtualPowerAnalyzer;theXT2640hasthreeofthemallowingforuptothreedifferentsetsofpower
measurementsinthesameunit,fornowwe’lljustuseone.
4) WireyourapplicationtotheXT2640(ensuretherearenovoltagespresentwhileperformingthis)
a) Seesection9fordetails.
5) ConfiguretheXT2640.
a) PresstheMEASCONFIGbuttonontheXT2640screen.Ifneeded,seesection12.1forfulldetailsregardingusingthe
touchpanelandsection12.4forfulldetailsregardingconfiguration.
Initiallywe’llstartwithsettingswhichareusableforjustaboutanyapplication;youcanalwayscomebackandchange
theselaterifyouwanttooptimizethemforyourspecificapplication.Everythingisvisibleontheonescreenwhichis
shownbypressingonebutton,soit’seasytorememberhowtochangesettingslaterbutwhatyouarenowseeingisall
you’lleverneedtoconfigureformanyapplications.
Thepresentsettingisshownineachbuttoninasmallertextsize,ifyouseeanythingwhichneedschangingthenpress
thatbuttontochangeit.
b) MEASMODE:SettoSINGLEVPA.
c) IntheCHANNELSareaofthisscreen(thisareaconfiguresthechannelsyou’lluse)‐
Selectthechannelsyouareusinganddeselectthoseyouarenot.Presseachnumericchannelbuttonasneededto
toggletheselection.
SCALE:IfyouareusingPTsorCTsthensetupthescalingforeachchannel,orturnoffscalingifnotusingthem.
ARANGE:Notallchannelshavethisbutton.SettoAUTOifavailable.
d) IntheMEASUREareaofthisscreen(thisareaconfigureshowmeasurementsaremade)–
LF/PERIOD:Setto10Hz/0.3s.
FUND:Setasfollows‐
For50/60HzapplicationssetthistoMAINS.
For400HzapplicationssetthistoAVIONICS.
ForotherapplicationssetthistoVOLTAGEwithamaximumfrequencyabovewhatyou’reexpecting
(youcansetthistoaveryhighfrequencyifyou’renotsure).
BANDWIDTH:SettoAUTO‐TRACKtoallowtheXT2640toautomaticallyconfigureitselfforfiltering.
HARMONICS:Setto50unlessyouknowyouneedotherthanthis.
e) IntheDATAareaofthisscreen(thisareaconfigureshowdataisdisplayed)–
COUPLING:SettoAC+DC.IfyouknowthatyouonlywanttheDCvaluesthensettoDCONLY.
RESPONSE:SettoMEDIUM.
DIGITS:Setto5.
ADJUST:SettoNONE.
f) IntheCOMBINEareaofthisscreen(thisareaconfigureshowmulti‐channelmeasurementsarecombined)–
XT2640OperatingManual 13July2016 Page15of187
WIRING:SettothewiringconfigurationwhichyouusedtowiretotheXT2640.
g) That’sitforconfiguration.PressthePOWERDATAbuttontosavetheconfigurationandtostartseeingthe
measurements.
6) Youcanapplyvoltagetoyourapplicationnow.
7) Selectwhatresultstolookat.
Viewingresultsisjustasinglepressononeoftheupper7buttonsdowntherightsideofthescreentoviewthatscreen.On
eachofthesescreensyoucanselectseveraldifferentwaysoflookingatthemeasurements.Inallcasesthebuttonsacrossthe
topofeachscreenallowsyoutoselectwhatyou’relookingat.Abriefsummaryofeachscreenisasfollows–
POWERDATA:enablesyoutoviewnumericalresultsfor–
Allvoltage,current,andpower(W,VA,VARandPF)measurements;inpeak,RMS,fundamentalonly,orrectified
forms.
Inrush.
Resistive,inductiveandcapacitiveloading.
Integratedandlong‐termaveragemeasurements(e.g.Watt‐Hours).
Efficiencyandpowerloss.
CUSTOMDATA:enablesyoutoviewjustaboutanynumericaldatayouwish,alongwithdescriptivetext.Youcan
configureawidevarietyofformatsforthisscreen.
HARMONICS:enablesyoutoviewvoltage,current,power,andinter‐phasevoltageharmonicsinbothgraphicaland
numericalformats.
VECTORS:enablesyoutoviewsingleormulti‐channelvoltageandcurrentgraphicallyasvectorsonapolarchart.
HISTORY:enablesyoutoseewhat’shappenedinthepastwithoutneedingconfigurationbeforehand.Givesagraphical
chartofmostmeasurementresultswithpowerfulzoomingcapabilities.
SCOPE:enablesyoutoviewthevoltage,current,powerandinter‐phasevoltagewaveformswithoutneedingconfiguration
(CYCLEVIEW),ortousetheXT2640asapowerfuloscilloscope(SCOPEVIEW).
STBYPOWER:enablesyoutoconfigure,runandviewtheresultsofEN50564lowpowermeasurementsinbothnumerical
andgraphicalformats.
ASSESSEUT:enablesyoutoconfigure,performandviewtheresultsofEN61000‐3‐2or‐12assessmentsofaEUT(if
measurementshavebeenconfiguredtodoso).
TheXT2640rememberswhatyouhaveconfigured,whichresultsscreenyouarelookingat,andhowyouhavesetupthatscreen.If
youturnofftheXT2640,whenyouturnitbackonitisconfiguredjustlikeyouleftit.Butit’sbesttoremovepowerfromyour
applicationwhenturningofftheXT2640.
TheXT2640alwaysmeasureseverythingconfiguredtobemeasured;measurementsarenotdependentonwhichscreenyou’re
lookingat.So,forexample,youcanconfigureanoscilloscopecaptureontheSCOPEscreen,changetoanotherscreenandthencome
backtotheSCOPEscreenlatertoseewhat’sbeencaptured.
IfyoursignalshaveinstabilitythentheresultsdisplayedbytheXT2640willrespondtothatinstabilitypossiblymakingresults
difficulttoread.InthosesituationsyoushouldgobacktotheMEASCONFIGforthatVPAandadjustoneormoreofthefollowing
settings–
SettheRESPONSEsettingtoaslowerresponse.Thisaveragesallresultsoveranumberofmeasurementperiods.
SettheLF/PERIODsettingtoalongermeasurementperiod.Thisslowsdownthechangesintheresults.
SettheDIGITSsettingtolessdisplayeddigits.Thisreducestheresolutiononmostnumericalresults.
SimplyexportingascreenimagetoaUSBdrivefileenablesyoutodocumentyourresultsforanyscreen.Youcanalsoexportand
importconfigurationsto/fromfilesonaUSBdrive,givingyouthefreedomtoexperimentwithconfigurationsettingswithout
worryingaboutbeingabletoreturntoapriorknownconfiguration.Seesection13fordetailsregardingthis.
XT2640OperatingManual 13July2016 Page16of187
8 APPLICATIONS
ThissectiondiscussesingeneraltermstheuseofXT2640channelsandvirtualpoweranalyzers(VPAs)intypicalapplicationsand
shouldbeusedtodecidewhichchannelsandVPAswillbeusedandwhatpurposeeachVPAperformsinauserapplication.Details
regardingconnectingthesignalstothechannelsaregiveninsection9andconfiguringthechannelsandVPAsaregiveninsection
12.4.
8.1 CHANNELS
ChannelsarenumberedCH1,CH2,CH3andCH4fromlefttorightwhenlookingattheXT2640rearpanel.
8.1.1 ELECTRICALCHANNELS
EachelectricalchannelprovidestheXT2640withonevoltageandonecurrentmeasurementwhicharealwayssimultaneously
sampledtoprovidethebestpoweraccuracy.TheXT2640canhaveonetofourelectricalchannelsinstalled.
Eachelectricalchannelcanbeoneoffourtypesandeachwithoneofthreecurrentinputoptions.Whichchanneltypeandcurrent
inputoptionisinstalledineachpositionisindicatedbyatwolettercodelabelledintheupperleftcornerofeachchannelsub‐panel.
Thechanneltypeisdenotedbythefirstletterofthetwolettercode–
S‐Provides0.1%accuracy,1MHzclassbandwidth,22bitsamplinganda1000Vrmsmaximumcontinuousvoltageinput
A‐Provides0.03%accuracy,1MHzclassbandwidth,24bitsamplinganda1000Vrmsmaximumcontinuousvoltageinput
L–SameastheAtypebutoptimizedfor<150VvoltageapplicationssuchasAC:DCandDC:DCpowersupplies
W‐Provides0.1%accuracy,5MHzclassbandwidth,22bitsamplinganda600Vrmsmaximumcontinuousvoltageinput
Thecurrentinputoptionisdenotedbythesecondletterofthetwolettercode–
D–DualShunt(upto20Armscontinuousand150Apkinrush)inasingleinputterminalpairwithresolutiondownto
0.1µA,alsocapableofbeingusedwithacurrentoutputCT.
H‐HighCurrent(upto30Armscontinuousand200Apkinrush)withresolutiondownto10µA,alsocapableofbeingused
withacurrentoutputCT.
X–ExternalvoltageoutputCTorShuntInput(20µVto15Vrms)withresolutiondownto0.1µV
Eachchannelcanbeindependentlyconfiguredforvoltagescaling(whenusinganexternalPT)and/orcurrentoffsetandscaling
(whenusinganexternalCTorshunt).
8.1.2 MECHANICALCHANNEL
OptionallyCH4canbeamechanicalMTtypechannel.Thisprovidesanalog(DCvoltage)ordigitalspeed,directionandtorqueinputs
forthemeasurementofmechanicalmotororgeneratordata.
8.2 VIRTUALPOWERANALYZERS(ORVPA)
TheXT2640isactuallythreepoweranalyzersinasinglechassiswithasingleuserinterface.ThesearecalledVirtualPower
Analyzers(orVPA)andarenumberedVPA1,VPA2andVPA3.Thenumbersaresolelydescriptiveandotherwiseservenofunction.
Youmayuseanyone,anytwo,orallthreeoftheVPAsdependingonthespecificapplication.
EachVPAcanbeindependentlyconfiguredformeasurementperiod,LFandHFfiltering,harmonicanalysis,signalfiltering,default
measurementcoupling,resultssmoothinganddisplayedsignificantdigits,multi‐channelwiringconfiguration,andefficiency
grouping.VPAsmayoptionallybeconfiguredtobesynchronizedtoeachother.
Eachinstalledelectricalchannelmaybeconfiguredinanyone(ornone)oftheVPAs.EachVPAmaybeconfiguredforuptoall
channelsinstalled(howeverWtypechannelsmaynotbemixedwithothertypesinthesameVPA).Thechannelsdonothavetobe
physicallyadjacentwhenconfiguringtheminaVPA,forexampleitisOKtoconfigureCH1andCH4inoneVPAandCH2andCH3in
another.
Seesections8.3,8.4and8.5forsometypicalusesofVPAsandsection12.4forconfiguringtheVPAs.
CHANNELS(1TO4MAYBEFITTED)
XT2640OperatingManual 13July2016 Page17of187
8.3 TYPICALSINGLEVPAAPPLICATIONS
DCand0.01Hztoover1MHz(Wchannels)or100kHz(L,AorSchannels)supplyfrequencies
Nx1øcanbeupto4ACorDCsupplies
2ø3wand3ø4wmeasuresneutralcurrentfromphasecurrents
3ø3wcanuseeither2or3‐wattmetermethods
2ø3w,3ø3w(3ch)and3ø4wmeasuresphase‐to‐phasevoltagesinadditiontotheindividualphasevoltages
Wye(3ø4w)andDelta(3ø3w)voltageconversionsfor3ø3wand3ø4wresp.
Powercanflowineitherdirection,separatelyintegratespowerineachdirection(perphaseandtotal)aswellasthetotal
Totalpower(W,VA,VARandPF)measuredinadditiontotheindividualphases
Max.holdmaintainedforvoltage,currentandpowermeasurements
Harmonicanalysisofeverysignaluptothe500
th
(optionH500)or100
th
(standard)harmonic<435kHz(Wchannels)or
<115kHz(L,AorSchannels)
Built‐inoscilloscopecapturingeverysignal,triggeringonanyselectedsignalforwaveformortransientanalysiswithout
interferingwiththepowerorharmonicmeasurements
EachchannelindividuallyconfigurableforPTand/orCTuse
POWER
SOURCE
LOAD
VPA
1 to 4
channels
Nx1ø
2ø3w
3ø3w
or3ø4w
XT2640OperatingManual 13July2016 Page18of187
8.4 TYPICALDUALVPAAPPLICATIONS
ExamplesofdualVPAapplicationsasshowninthediagrambelowinclude–
ACtoDCPowerSupplies(singleormultipleoutputs)
DCtoDCPowerSupplies(singleormultipleoutputs)
DCorfixedfrequencyACsuppliedvariableorfixedspeedmotordrives
PowerTransformers(singleormulti‐phase)
LightingBallasts(mosttypes)
StandbyorBackupPowerSupplies(ACorDC)
PhotovoltaicPowerGenerators(DCin;DCorACout)
TherearealsootherdualVPAconfigurationswhicharenotshownhere.Asexamples–
Iftheneutralcurrentistobeactuallymeasuredratherthancomputedfromtheotherphasesfora2ø3wor3ø4wsupplyor
loadthenthatisaccomplishedbyusingasecondVPAforjusttheneutralcurrentmeasuringchannelandsettingthatVPA
tobefullysynchronouswiththemainVPA.
IfaloadhasbothACandDCsupplyinputs(orviceversa),ortwodifferentfrequencyACsupplies,theneachsupplycanbe
measuredinseparateVPAsandanefficiencygroupusedtoproducethetotalinput(oroutput)powerfrombothVPAs.
EachVPAisindependentlyconfiguredandhasthesamecapabilitiesaspreviouslydescribedforsingleVPAapplications
(exceptonlyasingleoscilloscopeinoneVPAisallowed).
EachVPAcanbeconfiguredasNx1ø,2ø3w,3ø3w(2ch),3ø3w(3ch)or3ø4wlimitedbythetotalnumberofchannels
installed.
Overallefficiencyandpowerlosscanbemeasured.
ThetwoVPAsmaybeconfiguredaseither–
Totallyindependentandhavingtotallydifferentfrequencycontentsignalstoeachother.
Or,havetotallydifferentfrequencycontentsignalsbutmakemeasurementsovertimeswhicharesynchronized
toeachother.
Or,havethesamefrequencycontentsignalsandmakemeasurementsoverexactlythesameperiodsoftime(the
oscilloscopecapturesthesignalsinbothVPAsinthiscase).
XT2640
POWER
SOURCE
POWER
CONVERSION
VPA
1 to 4
channels
LOAD
VPA
1 to 4
channels
XT2640OperatingManual 13July2016 Page19of187
8.5 TYPICALTRIPLEVPAAPPLICATIONS
ExamplesoftripleVPAapplicationsasshowninthediagrambelowinclude–
EmergencyLightingBallasts(mosttypes)
StandbyorBackupPowerSupplies(ACorDC)
TherearealsoothertripleVPAconfigurationswhicharenotshownhere.Asexample–
IfafacilityhasabackuporPVsourceofpower,aninternalpowerdistribution,andalsoaccesstoanetworksupplythen
threeVPAscanbeused,onemeasuringeachofthese.InthiscaseyoushouldnotethattheXT2640canalsoseparately
integratetheboughtandsoldpowerforthenetworkpowersource.
EachVPAhasthesamecapabilitiesandareindependentlyconfiguredasforsingleVPAapplications(exceptonlyasingle
oscilloscopeinoneVPAisallowed).
EachVPAcanbeconfiguredasNx1ø,2ø3w,3ø3w(2ch),3ø3w(3ch)or3ø4wlimitedbythetotalnumberofchannels
installed.
Efficiencyandpowerlosscanbemeasured,overallandforeachintermediatestage.
Fortheexampleshownabove,thetotalchargeanddischargeAHrforthebatterycanbemeasured.
TheVPAsmaybeconfiguredaseither–
Totallyindependentandhavingtotallydifferentfrequencycontentsignalstoeachother.
Or,havetotallydifferentfrequencycontentsignalsbutmakemeasurementsovertimeswhicharesynchronized
toeachother.
Or,havethesamefrequencycontentsignalsandmakemeasurementsoverexactlythesameperiodsoftime(the
oscilloscopecapturesthesignalsinbothVPAsinthiscase).
8.6 MECHANICAL(MOTOR/GENERATOR)APPLICATIONS
IfaMTtypechannelisinstalledandconfiguredintheCH4locationthenitcanbeusedformechanicalmeasurementsinadditionto
thepreviouslydescribedelectricalmeasurementsperformedinVPA1toVPA3.Themeasurementofmechanicaldatacanbemade
independentlyofelectricalmeasurements,orsynchronizedtoaVPA,orallVPAsandthemotor/generatormeasurementsmayallbe
synchronizedtogether.
Seesection12.4.3forconfiguringtheXT2640formotor/generatormeasurements.
XT2640
POWER
SOURCE
AC
to
DC
VPA
1 to 4
channels
LOAD
VPA
1 to 4
channels
DC
to
AC
BATTERY
VPA
1 to 4
channels
XT2640OperatingManual 13July2016 Page20of187
9 WIRINGTOCHANNELS
ThissectionshowstypicalwiringtoeachchannelineachVPAmatchingtheconfigurationWIRINGsettingforthatVPAintheXT2640
MEASCONFIGmenu.
9.1 1ØWIRINGUSINGINTERNALCURRENTMEASUREMENT
CAUTION:
FORUSEWITHSH,SD,AH,AD,LH,LD,WHORWDCHANNELSONLY
DONOTCONNECTWIRINGWHILEVOLTAGEPRESENT.
ENSUREWIRINGISCORRECTBEFOREAPPLYINGVOLTAGE.
DONOTPASSLOADCURRENT>2ArmsWITHTHEXT2640TURNEDOFF.
WIRING:
Thickerconnectionsarecurrentcarrying.Ensurewireusedisratedforthemaximumvoltageandcurrenttobe
encountered.
Thinnerconnectionsarenotcurrentcarrying.Ensurewireusedisratedforthemaximumvoltagetobeencountered.
Thewiringconnectionsshownaboveensurethebestoverallsystemaccuracyinmostcircumstances,measuringthe
voltageatthesourceandtheloadcurrent.Forapplicationsrequiringaccuratemeasurementsofthepowertotheload
whenusinglowvoltages(<50V)andhighcurrents(>1A)changetheREDV+terminalconnectiontothatoftheBLUEA‐
terminalinsteadoftheYELLOWA+terminalshownabove,thisensuresthatthevoltagedropacrosstheAterminaldoes
notaffecttheVmeasurement,attheexpenseofthecurrentandpowermeasurementsincludingthecurrentandpower
drawnbytheVinput(whichmaybeadjustedforbyusingtheADJUSTsettingintheMEASCONFIGscreen).
XT2640CONFIGURATION:
IntheXT2640MEASCONFIGmenuyoushouldsetSCALEforthechanneltoOFF.
ForeitherconnectionmethodyoumayusetheADJUSTsettingintheMEASCONFIGmenutosettheXT2640toadjustthe
signalsfortheconnectionmethodandwhethersourceorloadresultsarerequired.
A
V
L or
HI
N or
LO
L or
HI
N or
LO
From
SOURCE To
LOAD
XT2640
CH
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