Extech Instruments EX650 User Manual

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ContinuityMeasurements
1. InserttheblacktestleadintothenegativeCOMterminalandtheredtestleadintothe
positiveterminal.
2. Setthefunctionswitchtothe position.
3. UsetheMbuttontoselecttheContinuitymode.LookfortheContinuityicon onthe
display.
4. Touchthetestprobetipsacrossthewireorcircuitundertest.
5. Iftheresistanceis<30Ω,thebeeperwillsoundcontinuously.Foranopencircuitcondition
themeterwilldisplayOL.


Fig4‐7CONTINUITYMEASUREMENTS
ContinuityMeasurementNotes:
 Turnoffpowertothecircuitundertestanddischargecapacitorsbeforemeasuring
continuity.
 Open‐circuitvoltageisapprox.‐3.5V
 Continuitymeasurementrangeis600Ω.
 Forpersonalsafety,donotmeasureacircuitwithvoltages>30VDCorAC.
 Disconnecttestleadsand
circuitmeasuredaftermeasurementsarecompleted.

Extech Instruments EX650 Specifications

General

Brand	Extech Instruments
Model	EX650
Category	Measuring Instruments
Language	English