XITRON XT2640 - Measuring Electrical Power to Avionics Requirements; Connecting the Xt2640; Configuring the Measurements Made by the Xt2640; AC 3-Phase Supplies

XT2640OperatingManual 13July2016 Page106of187
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20 MEASURINGELECTRICALPOWERTOAVIONICSREQUIREMENTS
ItisassumedinthissectionthatyouareconversantwiththegeneraloperatingmethodsusedintheXT2640asdescribedinsection
12.
Throughoutthissection,“requirement”isusedtodescribetheavionicsindustrydocumentdefiningthetestingbeingperformed(see
thelistbelowforthosespecificallyreferredtointhisdocument),“equipment”isusedtodescribetheequipmentbeingtestedtoone
oftheserequirements,and“supply”isusedtodescribethepowersupply(orsupplies)beingusedtoprovidethepowertothat
equipment.
TheXT2640maybeabletobeusedfortestingequipmenttootheravionicsrequirementsbyusingthegeneralmethodsdescribedin
thissection,butthissectionisspecificallytailoredfortestingperformedtothefollowingrequirements‐
RTCADO‐160E/F/G(Section16–PowerInput)
Boeing787B3‐0147
AirbusABD0100.1.8(A380)–requiresWtypechannelsandoptionH500.
AirbusABD0100.1.8.1(A350)–requiresWtypechannelsandoptionH500.
Note:
Itisyourresponsibilitytoensurethatanytestingyouperformtoarequirementfullymeetsthatrequirement.
RequirementAirbusABD0100.1.8.1(A350)specificallyrequiresspectrumanalysisratherthanharmonicanalysis.You
shouldusetheXT2640spectrumanalysisasdescribedinsection12.13insteadofharmonicanalysisfortesting‘harmonics’,
‘inter‐harmonics’and‘sub‐harmonics’tothatrequirement.
ThissectiondescribesusingtheXT2640duringseveraltestsdefinedbytherequirements.Ifthissectiondoesnotlista
specifictestthenthisdoesnotindicatethattheXT2640isincapableofassistingyouintheexecutionofthattest,itonly
indicatesthatitmaybeoflimiteduseorthatXiTRONhasnotevaluatedtheuseoftheXT2640tothatrequirement.For
example,theSCOPEorHISTORYcapabilitiesmaybeofuseinmanyteststeps.
20.1 CONNECTINGTHEXT2640
ForalltestscarriedouttotheserequirementstheXT2640shouldbeconnectedusingoneofthemethodsdescribedinsection9.
Generallyeitherthe1‐phaseor3‐phase4‐wiremethodswillbeusedfortheseapplications,correspondingtothesupplybeingused
bytheequipment.
Insomecasesyoumaybeprovidingtheequipmentwithmorethanonesupply.TheXT2640canbeconfiguredtousemultipleVPAs,
onepersupply,withthechannelsofeachVPAconnectedaccordingly.TheXT2640willthenmonitoreachsupplyindependentlyand
itnotrequiredthateachsupplyhavethesamefrequency.Thissectionhasbeenwrittenassumingthatonlysinglesupplyisbeing
tested.
20.2 CONFIGURINGTHEMEASUREMENTSMADEBYTHEXT2640
ThemeasurementconfigurationoftheXT2640variesslightlybetweenrequirements,andvarieswithwhetheranACoraDCsupply
isbeingusedbytheequipment.
Forcertainspecificteststheconfigurationmayrequiretobealteredfromthatshowninthissub‐section;wherethatisnecessaryitis
detailedinthespecificsub‐sectionforthattest.
Thesub‐sectionsbelowindicatethesettingsfortheMEASCONFIGscreenfor3‐phase,1‐phaseandDCsupplies.
Thechannelsshownbelowareexamples,inpracticeselecttheactualchannelsbeingusedforthesupply.
Iftestingmultiplesupplies,thenconfiguretheMEASMODEtoMULTI‐VPAandconfigureeachVPAforeachsupplytype.
20.2.1 AC 3‐PHASESUPPLIES
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FortheARANGEsettingforeachchannel–
ForSD,ADorWDchannelsitwillbeasshownabove.ThiswillnotbeshownifusingSH,AHorWHchannelsasnosettingis
required.