How to repair and maintain the insulation resistance multimeter

Insulation resistance multimeters generally use automatic calibration technology. Except for the parts that can be replaced, components should not be replaced at will to avoid deviations in technical indicators.

I. General maintenance

1) Clean the instrument housing regularly with a damp cloth and neutral detergent, and do not use abrasives or solvents. Dirt on the terminals and the test lead terminals will affect the readings. Clean the dirt on each terminal with a detergent.

2) When not in use, press the POWER button to turn off the power. Remove the battery for long-term use.

3) Store the instrument away from moisture, high temperature and strong magnetic fields.

II. Replace the battery

1) Press the POWER button to turn off the power, and remove the test lead or test lead from the terminal to completely disconnect the test lead from the circuit being tested.

2) Remove the two screws on the battery cover and remove the battery cover.

3) Remove the battery from the battery box.

4) Replace with 6 new AA (AM3/LR6) batteries (standard capacity is about 2450mAh).

5) Close the battery cover and install the two screws.

3. Replace the fuse

To avoid personal injury or instrument damage caused by electric shock or arc burns, the fuse must be replaced according to the following steps. Only fuses of the same model or electrical specifications can be used for replacement.

1) Press the POWER button to turn off the power, and remove the test leads or test wires from the terminals to completely disconnect the test wires from the circuit being tested. 2

) Remove the two screws on the battery cover, the two screws on the back cover of the housing, and the one screw behind the battery, and remove the battery cover and the back cover of the housing.

3) Gently pry up one end of the fuse, remove the burned fuse, and replace it with a fuse of the same model or electrical specifications. Make sure that the fuse is securely clamped in the middle of the fuse clamp. Fuse specification: F1A240V.

4) After closing the battery cover and the back cover of the housing, tighten the four screws. Do not use the instrument before tightening. (end)