Extech Instruments MG500 Manual

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MG500-EU-EN v1.0 7/13

Application‐SpecificInformation

MeasuringPowerToolsandSmallAppliances

Forsmallappliances,connecttheGREEN(EARTH)leadtoconductorsandtheRED(LINE)leadto

insulatingmaterial.



Forsingleordoubleinsulatedpowertools,oneleadshouldbeconnectedtothedevice’schuck,

blade,etc.andtheotherleadtooneoftheACpowe rcordconductors(testbothconductorsin

turn).Refertothepowertoolapplicationdiagrambelow.



ACMotorTest

Disconnectthemotorfromthelineby:

a. Disconnectingthewiresfromthemotor

terminalsor,

b. Openingthemainswitch

Ifthemainswitchisopened,andthemotorhasamotor‐starter,thenthestartermustbeheldin

the ON position. With the main switch opened, the measured resistance will include the

resistanceofthemotorwire andalloftheothercomponentsbetweenthemotorandthemain

switch. If a weakness is indicated, the motor and other components should be checked

individually.Ifthemotorisdisconnectedatthemotorterminals,connecttheREDleadto

the

groundedmotorhousingandtheGREENleadtooneofthemotorleads.

Plug

For 2 or 3 prong plugs, connect the

RED lead to one conductor at a time

Connect the GREEN

lead to the chuck

Connect RED lead

to grounded housing

Connect GREEN lead

to the motor leads