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EX65x‐en‐GB_V1.67/16

‘LoZ’ACVoltageMeasurements

Thenormalhighinputimpedance(voltagemeasurement position)wouldtypicallybeused

forallACvoltagetests.However,ifavoltageonanon‐energizedlineisdetectedusetheLoZ

settingtodetermineifthevoltageisreallythereorisitaghostvoltage.

WhenthefunctionswitchisturnedtotheLoZ 

positionalowimpedance(Z)testcircuitis

engagedthateliminatesghostvoltagesonnon‐energizedlines.RefertotheVoltage

MeasurementssectionearlierinthisguideforSafetyinformationandconnectiondiagrams.

*TheLoZimpedanceisapprox.3kΩ.

1. Inserttheblacktestleadbananapluginto

thenegative(COM)jackandtheredtestlead

bananaplugintothepositive(V/Ω)jack.

2. MovetheFunctionSwitchtotheLoZposition.

3. TouchthetestprobetipstotheACcircuitundertest.Besuretoobservethecorrect

polarity(redleadtopositive,black

leadtonegative).

4. Readthedigitalvalueandthe60‐segmentbargraphrepresentationofthemeasurement

(EX655)inthedisplay.Thedisplaywillalsoindicatetheproperdecimalpointand

measurementtype/unitssymbols.

5. ThemeteriscapableofdetectingACvoltagesto600VinLoZmode.Note

thevoltage

alertsymbolwhenvoltageispresent.

Extech Instruments EX655 User Manual

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