Extech Instruments EX655

EX65x‐en‐GB_V1.67/16
22
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.