AEMC 3640 User Manual

Digital Ground Resistance Tester Model 3640 and 4610 37CHAPTER 5MAINTENANCE5.1 WarningPlease make sure that you have already read and fully understand theWARNING section on page 3.• To avoid electrical shock, do not attempt to perform any servicingunless you are qualified to do so.• To avoid electrical shock and/or damage to the instrument, do notget water or other foreign agents into the case. Turn the instru-ment OFF and disconnect the unit from all circuits before openingthe case.5.2 CleaningNOTE: 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 eight1.5V “AA” batteries.• Replace with new batteries and reassemble the instrument.