XITRON XT2640 - Measurements; Xt2640 for En61000‐3‐2 or ‐12 M Easurements

XT2640OperatingManual 13July2016 Page93of187

harmonicemissionsresults(inparticular,ahighvoltagecrestfactor,anunlockedfrequency,orapeakphase
positionerrorcausedbynoiseratherthandistortion).Ifsuchadecisionisreached,thenitisrecommendedthat
yourecordthisinyourtestreportalongwitharationaleforignoringthefailure.
b)
Or,repeattheassessment.Insomecasesthesefailuresmaybetransitoryinnature;theremaybeareasonable
possibilitythatsimplyrepeatingthetestwouldnothavethesamesupplyvoltagefailure.Ifsuchadecisionis
reachedanditresultsinasuccessfulassessment,thenitisrecommendedthatyourecordthisinyourtestreport
alongwitharationaleforrepeatingthetesthoweverthereisnorequirementtodoso.
c)
Or,independentlyassesswhetherthesupplyvoltagefailurewassignificantornot.Ifsuchadecisionisreached,
thenitisrecommendedthatyourecordthisinyourtestreportalongwitharationaleandtheresultsofthe
independenttest.
18.1.6.2 TESTINGTHEXT2640MEASUREMENTSFOR COMPLIAN CE
InaccordancewiththerequirementsofEN61000‐4‐7clauses5.1and5.2themeasurementsmadebytheXT2640arecontinuously
checkedbytheXT2640throughouttheassessmentoftheEUTasfollows‐
CurrentOverload:Eachphasecurrentischeckedforbothpeak(i.e.possiblytransitory)andRMS(i.e.probablysignificant)
overloadsduringtheentireassessmentperiod.PeakandRMSoverloadsareseparatelyindicated.
VoltageOverload:Eachphasevoltageischeckedforbothpeak(i.e.possiblytransitory)andRMS(i.e.probablysignificant)
overloadsduringtheentireassessmentperiod.PeakandRMSoverloadsareseparatelyindicated.
Note:
Ifanoverloadisdetectedthenthisisindicatedaspartoftheassessmentbutdoesnotaffecttheindicatedassessedpass/fail
resultoftheEUT.Ifanoverloadisindicatedthenyoushoulddecidewhetherornottoaccepttheassessment.
Recommendation:
Generallyifanoverloadindicationisshownthenthefinalpass/failassessmentoftheEUTshouldbedisregardedandthe
assessmentrepeatedwiththeXT2640currentrangereconfigured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.
PresstheMEASMODEbuttonandselecttheEN61000‐3‐2orEN61000‐3‐12choicesasapplicable.
3.
Configurethechannelswhichyouwishtouseasneeded(seesection12.4.2.1).
4.
NoneoftheMEASUREareabuttonsareusable,theyindicatetheconfigurationformeasurementssuitableforcompliance
testingandtheyarenotchangeable.
5.
IntheDATAarea‐
a.
SelecteithertheACONLYorAC+DCCOUPLINGselectionsbypressingtheCOUPLINGbuttonandselectingthe
choicedesired.NotethatEN61000‐3‐2and‐12havenorestrictionsonthissetting;howeverEN61000‐4‐7
recommendsthatmeasurementsbeACONLYalthoughitdoesallowAC+DCmeasurements.
b.
TheRESPONSEsettingcannotbealteredasitissetbyEN61000‐4‐7toasingleorder1.5secondresponsefilter.
c.
TheDIGITSsettingallowsyoutoselecthowmanydigitsofresolutionwillbedisplayedfornumericalresultson
mostoftheresultsscreens.Aselectionof5isrecommended.
d.
TheADJUSTsettingmaybesetasdescribedinsection12.4.2.3.4.AspreviouslydiscussedforEN61000‐3‐2and‐
12measurementsgenerallytheLOAD(V@LOAD)settingisusedwiththeVterminalsconnectedtothevoltagesat
theEUT,howeveranyoftheothersettingsmaybeusedaslongastheydonotdifferfromtheVterminalwiring
pointandtheSRCE(V@LOAD)andSRCE(V@SRCE)settingsarenotrelevantasthoseconfiguretheXT2640to
makepowermeasurementsofthesource,notthatintheEUT.
6.
IfmorethanonechannelisselectedthenaCOMBINEareaisshownwhichcontainstheWIRINGbutton.Thisallowsyou
selectthewiringfortheEUTandsupplysource.Thissettingisdescribedinsection12.4.2.4.1,howevernotethatfora
3ø3wEUTthe3ø3w(3ch)selectionandwiringmethodshouldbeused.
SelectinganyotherscreenthantheMEASCONFIGscreenwillsavethisconfiguration,resultinginmeasurementstotherequirements
ofEN61000‐4‐7(andsototheselectedEN61000‐3standard)beingavailablealmostimmediately.