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381676A-en-GB_V1.1 08/15

OperatingInstructions

WARNING:Riskofelectrocution.High‐voltagecircuits,bothACandDC,areverydangerousand

shouldbemeasuredwithgreatcare.

NOTE:OnsomelowACandDCvoltageranges,withthetestleadsnotconnectedtoadevice,

thedisplaymayshowarandom,changingreading.Thisisnormalandiscausedbythehigh‐

inputsensitivity.Readingswillstabilizeandgivepropermeasurementwhentestleadsare

connectedtoacircuit.



NON‐CONTACTACVOL TAGEDETECTOR(NCV)

WARNING:TesttheACvoltagedetectoronaknownlivecircuitbeforeeachuse.



WARNING:BeforeusingthemeterintheACVoltageDetectormode,verifythatthebatteries

arefreshbyconfirmingcharactersappearontheLCDwhenthefunctiondialisturnedtothe

voltage(V)position.DonotattempttousethemeterasanACVoltageDetectorifthebatteries

areweakorbad.

Notes:

Voltagemaystillexistevenwithnoindicationgivenbythemeter.DonotsolelyrelyonNCV

detectiontodeterminethepresenceofvoltage.Socketdesign,insulationthicknessandother

factorsmayaffectreadings.

TheNCVindicatorLEDmayflashwhilemeasuringAC/DCvoltageduetothepresenceof

induced

voltage.

ExternalenvironmentalinterferencefromadditionalsourcescanfalselytriggerNCVdetection.



1. Disconnectthecommon(negative)testleadfromthebottomofthemeter.

2. WiththefunctionswitchsettoanypositionexceptOFF,pressandholdtheNCVbutton.

3. Movethetipofthemeter

nearthevoltagesourceorconductorasshown.

4. Ifthevoltagedetectedis>110VAC,thebeeperwillsoundandtheNCVindicatornearthe

tipofthemeterwillflash.Alwaystestthedetectoronaknownlivecircuitfirstbefore 

attemptingothertests.



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Extech Instruments 381676A User Manual

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