XITRON XT2640 - Configuring a VPA

XT2640OperatingManual 13July2016 Page40of187
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IfyouselectSPECTRUMthenonlyasingleVPAmaybeused(VPA1)asfortheSINGLEVPAselection,butspectrumanalysis
isperformedinsteadofafullharmonicanalysis.ThisisonlyavailableifoptionH500isinstalled.
IfyouselectEN61000‐3‐2thenonlyasingleVPAmaybeused(VPA1)asfortheSINGLEVPAselection,butEUT
measurementsareinaccordancewithEN61000‐4‐7andassessmentsinaccordancewithEN61000‐3‐2areavailable.This
selectionisonlyavailableifbothoptionsH500andENareinstalled.
IfyouselectEN61000‐3‐12thenonlyasingleVPAmaybeused(VPA1)asfortheSINGLEVPAselection,butEUT
measurementsareinaccordancewithEN61000‐4‐7andassessmentsinaccordancewithEN61000‐3‐12areavailable.
ThisselectionisonlyavailableifbothoptionsH500andENareinstalled.
Caution:
DonotalterthemeasurementmodewhileperforminganassessmenttoEN50564,EN61000‐3‐2orEN61000‐3‐12.
Recommendations:
Unlessyouspecificallyneedoneoftheothermodes,selecttheSINGLEVPAmode.
TheuseoftheSYNCVPAmodeisonlyrecommendedwhenlongorwidelydifferentmeasurementperiodsarebeingused
andthesignalsarechangingrapidly.InmostmultipleVPAapplicationsitisrecommendedtousetheMULTIVPAmode
withthesamemeasurementperiodconfiguredineachandifnecessarybecauseofchangingsignallevelsuseshorter
measurementperiodsforbettersynchronizationoftimingbetweenVPAsandthenincluderesponseaveragingasneeded
tostabilizethereadings,thisisparticularlyrecommendedifthesignalsintheVPAshavewidelydifferingfrequency
content.
12.4.2 CONFIGURINGA VPA
TheconfigurationshownonthescreenshowstheconfigurationforaselectedVPA.TheCONFIGVPAbutton(notshownifonlya
singleVPAisavailableandnoMT(Motor)channelisinstalled)allowsyoutoselectwhichVPAconfigurationisbeingdisplayed.
Note:
ThesettingsonthisscreenonlyaffecttheselectedVPAexceptasdenotedbelow.
12.4.2.1 SELECTINGANDCONFIGURINGTHECHANNELSINAVPA
ThisisperformedbyusingthebuttonsintheCHANNELSarea.
12.4.2.1.1 SelectingtheChannels
Ifyoupressanyoftheavailablechannelnumberbuttons,thenthatchannelistoggledbetweenselected(buttonhighlightedgreen)
orunselected(nothighlightedandcoloredgrey).
PressingtheALLbuttonselectsthatallavailablechannelswillbeusedintheselectedVPA.
Note:
Onlychannelswhicharefittedaredisplayed.
Asanaide,thechanneltypeandcurrentoptionforeachchannelisshowninthelowerportionofeachofthechannel
numberbuttonsasthetwolettercode.
DeselectingallchannelsfromtheselectedVPAdisablestheselectedVPA.
AchannelcanonlybeselectedinasingleVPA;selectingachannelintheselectedVPAdeselectsitinotherVPAs
automatically.
WtypechannelscannotbeselectedalongwithothertypechannelsinthesameVPA,butanyothertypesofchannelscanbe
intermixedinthesameVPA.IfyouneedtochangetoselectingaWtypechannelthenyoumustfirstdeselectallofthe
othertypesofchannelsbeforeyoucanselectaWchannelinthatVPA.Conversely,ifanyWtypechannelsareselectedina
VPAandyouneedtochangetoselectinganothertypeofchannelinthatVPAthenyoumustfirstdeselectalltheWtype
channelsbeforeyoucanselectadifferenttypeofchannelinthatVPA.
Caution:
DonotalterthechannelcontentofaVPAwhileperforminganassessmenttoEN50564,EN61000‐3‐2orEN61000‐3‐12.
12.4.2.1.2 ScalingChannels
PressinganyofthechannelSCALEbuttonsallowsyoutoconfigurethatchannelforvoltagescaling,currentscalingand/orcurrent
offset.
PressingtheSCALEbuttonnexttotheALLbuttonsetsallselectedchannelstothesamescalingandoffsetsettings.
IfanyscalingisconfiguredtobeappliedtoachannelthenONisshownintheSCALEbuttonforthatchannelandthebuttonis
highlighted,otherwiseOFFisshownandthebuttonisnothighlighted.
Anexampleofthescreenusedtosetupchannelscalingisshownbelow.