XITRON XT2640 - Viewing the Results of an Assessment

XT2640OperatingManual 13July2016 Page97of187

NUMINTERVALS:Thisallowsyoutoselectthatanassessmentistobeperformedintwoorthreeintervals,eachhavinganidentical
testtime,withtheassessmentbeingpausedbetweenintervalsuntilyoupresstheCONTINUEbutton,ortobeperformedasasingle
interval.
Recommendation:
Thisisgenerallynotrequiredandsoshouldbesetto1,butinEN61000‐3‐2AnnexCtherearesituationswherethis
activityisrequiredandsoshouldbesetto2or3accordingly.
AUTOSTART/STOP:ThisallowsyoutoselectanyactivitiesregardingwhentheEUTisstartedorstopped(i.e.drawssignificant
powerordrawslittlepower).IfsettootherthanOFFthenthereareadditionalsettingsavailablewhichallowyoutoenterthe
start/stoppowerdetectionlevelandthedelaytousefollowingatransitionbetweenstartandstop(seebelowfordetails).The
availableselectionsare‐
OFF:WhenthisisselectedtheassessmentalwaysprogressesandthereisnodetectionofwhethertheEUTisstartedor
stopped.
DELAYONLY:WhenthisisselectedwhenevertheEUTpowerchangesfromabovethedetectionleveltobelowit(i.e.becomes
stopped)orfrombelowtoabove(i.e.becomesstarted)thenadelayisstartedduringwhichtheassessmentisautomatically
paused.Thisistheactivityrequiredbyclause6.2.3.3ofEN61000‐3‐2andclause4.2.4ofEN61000‐3‐12whenaEUTis
“
broughtintooperation”or“takenoutofoperation”.
AUTOPAUSE:WhenthisisselectedtheassessmentiscontinuouslypausedwhenevertheEUTpowerisbelowthedetection
level.
AUTOSTOP:WhenthisisselectedtheassessmentisonlyperformedwhiletheEUTpowerisabovethedetectionlevelandis
automaticallystoppedwhentheEUTdropsbelowthedetectionortheconfiguredtesttimehaselapsed(whicheveroccurs
first).IftheEUTpowerisbelowthedetectionlevelwhentheassessmentisstartedthenitispauseduntiltheEUTpowergoes
abovethedetectionandthenaftertheconfiguredstartdelayhaselapsed.Thisisrarelyused,butisusefuliftheEUThasonly
arelativelyshortperiodofoperationduringassessment.Typically,theTESTTIMEsetwouldbelongerthantheexpected
operationtimeoftheEUTforthissituation.
Note:
Neitheranydelaysnorpausesareconsideredpartoftheassessmenttime.
Recommendation:
MostEUTsdonotactuallystartorstopduringanassessmentsoOFFisgenerallyrecommendedforthissetting.Forstrict
assessmenttoEN61000‐3‐2and‐12thenDELAYONLYorpossiblyAUTOSTOPsettingsshouldbeconsideredalongwith
enteringvaluesforthestart/stopdetectionpowerlevelandthedelaytouse.
AUTOPAUSEisrarelyused,butisincludedtoallowfullconfigurationcapability,particularlywhenmitigationisneededfor
anassessmentfailure.
AUTOSTOPisrarelyused,butisusefuliftheEUThasonlyarelativelyshortperiodofoperationduringassessment.
Typically,alsotheTESTTIMEwouldbesetslightlylongerthantheexpectedoperationtimeoftheEUTinthissituation.
STOPPOWER:Thisallowsyoutoenterthestart/stopdetectionpowerlevelandisonlyavailableifAUTOSTART/STOPisnotsetto
OFF.Seeaboveforhowthissettingisused.
Recommendation:
IfneededthisshouldbesettoasuitablevaluetoallowtheXT2640toreliablydetectstartingandstoppingeventsinthe
EUT.
STARTDELAY:ThisallowsyoutosetthenumberofsecondstodelayaftertheEUTisdetectedasstartingorstoppingbefore
continuingtheassessmentlevelandisonlyavailableifAUTOSTART/STOPisnotsettoOFF.
Recommendation:
EN61000‐3‐2clause6.2.3.3onlyallowsthistobesetto10seconds,andEN61000‐3‐12clause4.2.4recommends10
secondsbutallowsalongerperiod.TheXT2640allowsanydelaytobeenteredwithintherange3secondsto1000
seconds.
18.4.3.4 STARTINGTHEASSESSME NT
WhentheSTARTbuttonispressedonthisscreentheassessmentisstartedasyouhaveconfigureditandyouarereturnedtothe
ASSESSEUTscreen,otherwiseiftheCANCELbuttonispressedanyentriesyouhavemadearediscardedandyouarereturnedtothe
ASSESSEUTscreenwithoutanassessmentbeingstarted.
Recommendation:
Youmustensurethatthe1.5secondfilteringrequiredbythestandardshasfullysettledpriortostartinganassessmentso
theEUTmusthavebeenpoweredandhavebeenstableforatleast10secondspriortostartingtheassessment,theXT2640
doesnotenforcethisandingeneraltheEUTwillrequirelongerthanthistostabilize.
ForcertaintypesofEUTthestandardsmayhaveadditionalrequirementsregardingaminimumstabilizingtimeperiod
duringwhichthesupplysourceandEUTarepoweredpriortostartinganassessment.ParticularlyseeAnnexCof
EN61000‐3‐2forfurtherdetails.
18.4.4 VIEWINGTHERESULTSOF AN ASSESSMENT
BothduringanassessmentandafteranassessmenthasbeenperformedtheresultsofthatassessmentaredisplayedintheASSESS
EUTscreen.
Note:
Insomecases,asdescribedinthefollowingsub‐sections,thedatashownisspecifictotheselectedXT2640channeltobe
viewedasselectedbytheleftmostbuttonacrossthetopofthescreen.