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9.1
Maintenance
Please make sure that you have read and fully understand the WARNING
section on page 3.
• To avoid electrical shock, do not attempt to perform any servicing unless
you are qualified 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 instrument OFF and disconnect the unit from all circuits before
opening the case.
• Use specified spare parts only.
9.2
Cleaning
Disconnect the instrument from any source of electricity.
Use a soft cloth lightly moistened with soapy water. Wipe with a moist cloth and
then dry with a dry cloth. Never use alcohol, solvents or hydrocarbons.
9.3
Fuse Replacement
The unit is protected from overloads by two identical fuses:
•
Fuse for terminal H (Z):
If this fuse is defective, the unit will no longer produce an output voltage, making it
impossible to perform resistance measurements.
To test this fuse, turn the switch to the mΩ position (2-Wire), connect measurement
leads to terminals H (Z) and E (X) and start a measurement. If the unit refuses to
operate and the symbol for terminal H (Z) blinks, the fuse must be replaced.
Ground Resistance Tester Model 6472
CHAPTER 9
MAINTENANCE
59
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