FLIRTA72_TA74‐GETTINGSTARTEDDocumentIdentifier:TA72_TA74‐QS‐mul_AA
V AC
ConnecttoDMMClamparoundoneconductoronly
1
2
ClampJawLock
ACCurrentMeasurements
WARNING:EnsurethatpowertothedeviceundertestisOFFbeforestartingthisprocedure.Switchpowertothedevice
undertestONonlyaftertheclamphasbeensafelyattachedtothedeviceundertest.
CAUTION:Donotmovefingersabovethemeter’sindicatorlampsatanytimeduringatest.
1. SwitchOFFtheClampAdaptor,theDMM,andthe deviceundertest.
2. ConnecttheClampAdaptortotheDMMinputjacksusingthesuppliedbananaplugs(seediagrambelow).
3. SwitchONtheDMMandsettheDMMtotheACVmode.
4. UsetheRANGEbuttonto
setthemeasurementrangetotheexpectedcurrentrangemeasurement.
5. Turntheclamplock(1)counter‐clockwisetoreleasetheclamp(2);seeClampJawLockdiagram.
6. Fullyencloseonlyoneconductorofthedeviceundertestwiththeflexibleclampprobe.Donotmeasurecurrenthigherthan
thespecified
currentlimit.
7. Attachtheflexibleclamp(2)tothelock(1)andsecureitbyturningthelockclockwise.
8. SwitchtheClampAdaptorON(pressandholdthePowerbutton)andthenswitchthedeviceundertestON.Nevermovefingersabovethe
rangeindicatorlightswhen
testing.
9. ReadthecurrentvalueintheDMMdisplay.
10. RemovepowertothedeviceundertestbeforeremovingtheClampconnection.
ManualRangeSelection
Forthebestresults,withregardtooutputsignal,selectthecorrectrange,usingtheRANGEbutton,accordingtoexpectedcurrent
measurement.SeeTableandExamplesbelow:
*MultiplyDMMreading(inVACmode)by10,100,or1000,asshownabove,todeterminetheamountofcurrentmeasuredbytheclamp
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Example1:30AMeasurement
WiththeDMMsettotheACVoltagemode:
Clampsettothe30Arange:theclampoutputwillbe3000mV(3.0VAC)
DMMwilldisplay3.000intheVACmode(x10=30A)
Clampsettothe300Arange:theclampoutputwillbe300mV(0.3VAC)
DMMwilldisplay
0.300intheVACmode(x100=30A)
Example2:60AMeasurement
WiththeDMMsettotheACVoltagemode:
Clampsettothe300Arange:theclampoutputwillbe600mV(0.6VAC);
DMMwilldisplay0.600intheVACmode(x100=60A)
Clampsettothe3000Arange:theclampoutputwillbe60mV(0.06VAC)
DMMwilldisplay0.060
intheVACmode(x1000=60A)
Example3:600AMeasurement
WiththeDMMtotheACVoltagemode:
Clampsettothe300Arange:theclampoutputwillreach4500mV(4.5
VAC);thisisanoverrange(overload)condition.Selectthehigher3000A
range:theclampoutputwillbe600mV(0.6VAC);DMMwilldisplay0.600
intheVACmode(x1000
=600A)
RangeSelected BestPerformance Multiplier*
30A(100mV/1A) 30.00Amaximum DMMreading x10
300A(10mV/1A) 30.0~300.0A DMMreadingx100
3000A(1mV/1A) 300.0~3000A DMMreadingx1000