Extech Instruments MG500 Manuel d'utilisateur télécharger pdf (Page 8)

MG500-EU-EN v1.0 7/13

TheEnersave

Mode

Enersave

 mode conserves battery life by performing a relatively short test (10 seconds). The

Enersave

 mode is the default test mode. To bypass this mode and run a longer test (100

seconds) press and hold

 the TEST button for 3 seconds when starting a test. Do not hold for

longerthan3secondsasaDARorPItestmaystartinsteadasexplainedinthenextsection.



DARandPITests(DAR:DielectricAbsorptionRatio)and(PI:PolarizationIndex)



Warning:Thecircuitundertestmustbecompletelyde‐energizedandisolatedbeforemaking

testconnections.



1. After turning the unit on, make sure that the Replace Battery messageis not displayed.If

theReplaceBatterymessageisdisplayedreplacethebatteriesbeforeproceeding.

2. The test voltage defaults to 2500V on power up. Select the desired test voltage using the

Voltage Adjust buttons (±500V) that step

 through the available test voltages in 500V

incrementsorbypressingoneofthepresettestvoltagebuttons(10kV,5kV,2.5kV,1Kv).

3. ThedisplayshowstheConnectLeadspromptalongwiththeselectedtestvoltagevalue.

ConnecttheGreen testleadtotheGreentestsocketonthemeter

andthentotheGround

sideoftheinsulatorundertest.

Connect the Red lead to the Red test socket on the meterand the Blue guard cable to the

bluesocketonthemeter.Connecttheserviceendofthe Redcableto othersideofthe

insulatorundertest.



IfaLeakage Guardleadisrequiretocollectsurfaceleakage,connecttheseparateBluetest

leadintotheBlueguardleadfromtheRedtestleadwhichispluggedintotheBluetest

socket on the meter and then clip the service end of the cable to the surface

of the

insulatorundertest.

4. Pressandhold

theTestStart/Stopbuttonforatleast5secondstotheinitiateDAR/PItesting

mode.

5. After1minute,theelapsedtesttimerappearsontheupperline(righthandside)ofthe

display.Theresistancereadingisshownontheupperlefthandsideofthedisplay.Thelower

lineshowsthetestvoltageandtheDARvalue.

6. After10minutes,thetestcompletes.Thedisplaywillshowtheresults:

R=(resistanceorOVERRforoverrange)

T=Hold,T=10:00,V=(testvoltage)

PI=(PIvalue)

DAR=(DARvalue)

7. To

takeanothertest,presstheTESTSTART/STOPbutton,theConnectLeadspromptshould

appearonthedisplay;theinstrumentisnowreadytorunanewtest.



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Extech Instruments MG500 Manuel d'utilisateur Page 8

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