Extech Instruments MG500 Manuel d'utilisateur télécharger pdf (Page 9)

MG500-EU-EN v1.0 7/13

BargraphVoltageDisplay

Thebargraphrepresentsthevoltagepresentonthetestleadsasitrises,soaks,anddecays.The

bargraphappearsonthelowerleftofthedisplaywindowduringatest.

AutomaticUnder/OverRangeResistanceDetect

Ifthedisplayshowsthemessage“LOWM‐ohms”,thetestshouldbeinterruptedimmediatelyby

pressingtheTESTbutton.Thismessageindicatesthattheinsulationundertesthasbrokendown

andthemeteristryingtoinjectahighpotentialontoashortcircuit.If‘HIGH’appears,itislikely

thatthetestconfigurationisopen.Checkthetestset‐upandthentestagain.

ElapsedTimer

Thetestdurationisindicatedonthedisplay.Thisisparticularlyusefulindeterminingwhetheran

insulatingmaterialundertestwillbreakdowninagivenamountoftime.

ManualTestSTOP

Tostopatestinprogress,presstheTESTbutton.Thetestwillimmediatelyendandthesystem

willautomaticallydischarge.

AutomaticTestSTOP

When in the default Enersave

 mode, the test automatically stops after approx. 10 seconds.

WhennotintheEnersave

modethetestautomaticallystopsafterapprox.100seconds.

LiveCircuitWarning

Ifthetestleadsareconnectedtoalivecircuit(approx.500V),awarningbeeperwillsoundand

themeterwilldisplay“LiveWarning…CircuitLive…”Inthiscase,correcttheproblemandretest.

AutomaticDischarge

At the end of a test, the meter automatically discharges the high voltage. The automatic

discharge status is reflected on the display. During discharge the beeper will sound  and, when

completelydischarged,theHOLDiconwillappearonthedisplay.

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Extech Instruments MG500 Manuel d'utilisateur Page 9