EXTECH MA620 [10/17] Dc voltage measurements

MA61_MA63-en-GB_V1.0 3/15

DCVoltageMeasurements 

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Vposition.

3. PresstheMODEbuttontoselectDCifnecessary.

4. Touchthetestprobetips

tothecircuitundertest.Besureto

observethecorrectpolarity(redleadtopositive,blackleadto

negative).

5. Readthevoltageinthedisplay.Thedisplaywillindicatethe

properdecimalpointandvalue.Ifthepolarityisreversed,the

displaywillshow(‐)minusbefore

thevalue.

6. ThemeteriscapableofdetectingDCvoltagesto600V.

7. Whenvoltageismeasured,theNCVvoltagedetectLEDwillbe

lit.

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Fig‐6DCVOLTAGEMEASUREMENT

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ResistanceMeasurements

Cautions:SwitchOFFpowertothedeviceundertestbeforemeasuring.Donottestoncircuits

ordeviceswhere60VDCor30VACispresent.

1. Inserttheblacktestleadbananaplugintothenegative

(COM)jack.Inserttheredtestleadbananaplugintothe

positive(V/Ω)jack.

2. TurntheFunctionSwitchtotheΩposition.

3. UsetheMODEbuttontoselecttheΩicononthedisplay

indicatingresistanceonly(withoutthe

audiblecontinuity

iconshowing).

4. Touchthetestprobetipsacrossthecircuitorpartunder

test.Itisbesttodisconnectonesideofthepartundertest

sotherestofthecircuitwillnotinterferewiththe

resistancereading.

5. Readtheresistanceinthedisplay.The

displaywillindicate

theproperdecimalpointandvalue.



Fig‐7RESISTANCEMEASUREMENT

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