Extech Instruments MG500 Manual

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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.

