EXTECH EX655 [22/35] Continuity measurements

EX65x‐en‐GB_V1.67/16

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Meas urement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.