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Digital Ground Resistance Tester Model 3640 and 4610

CHAPTER 5

MAINTENANCE

5.1 Warning

Please make sure that you have already read and fully understand the

WARNINGsectiononpage3.

• Toavoidelectricalshock,donotattempttoperformanyservicing

unlessyouarequaliedtodoso.

• Toavoidelectricalshockand/ordamagetotheinstrument,donot

getwaterorotherforeignagents into thecase.Turntheinstru-

mentOFFanddisconnecttheunitfromallcircuitsbeforeopening

thecase.

5.2 Cleaning

NOTE: Disconnect the instrument from any source of electricity.

• Useasoftclothlightlydampenedwithsoapywater.

• Rinsewithadampclothandthendrywithadrycloth.

• Donotusealcohol,solventsorhydrocarbons.

5.3 Replacing the Battery

• Loosenthetwofasteningscrewsonthebatterycompartmentcover,

whichislocatedonthebottomofthecase(SeeFigure24).

• Removethebatterycompartmentcovertogainaccesstotheeight

1.5V“AA”batteries.

• Replacewithnewbatteriesandreassembletheinstrument.

AEMC 3640 User Manual

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