Extech Instruments 382357 Specifikace stáhnout pdf (Strana 9)

382357‐EU‐ENV2.42/13

ServiceEntrance

Note:Multiplegroundrods,multiplegroundsi.e.groundrod(s)andwaterpipegrounds,ora

combinationmaybepresentdependingontheparticularsituation. Inthesesituationsitis

necessarytomakeyourmeasurementsbetweentheservice‐entranceneutralandall

subsequentgroundpoints.



Troubleshooting

1. Snapthejawsopenandclosedtwoorthreetimesbeforeturningthemeteron

2. Donotclampontoanydeviceduringthepower‐upinitializationsequence.

3. Snapthejawstwoorthreetimesafterclampingontothegroundelectrodeorrod.

4. Slightamountsofdriftmayoccurathighresistancemeasurements;thisisnormaland

shouldnotbecauseforconcern.

Blankdisplayoranyfailuremode

Replacethebatterybeforeproceeding.

Start‐upInitializationFailure

Thestart‐upcalibrationwillcontinueindefinitelyifthejawsareopenordirty.Checkthatthe 

jaws’matingsurfacesareclean.Donotopenthejawswhiletheinitializationsequenceis

running.

NoiseontheGroundElectrodeorRod

Ifnoiseispresent(over3Aor30V)onthegroundelectrodeorrod,theword“NOISE“will

appearonthedisplayandreadingscannolongerbeconsideredaccurate.Beforethemetercan

beusedaccurately,thenoiseproblemmustbeaddressed.

Distribution

Panel

Ground

Rod

Water

Pipe

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Extech Instruments 382357 Specifikace Strana 9