Routine protection of insulation resistance meter

Insulation resistance meters usually use automatic calibration technology. Except for the parts that can be replaced, components should not be replaced at will, otherwise mistakes will occur due to neglecting the technical indicators.

I. General maintenance
1) Clean the outer shell of the meter regularly with a damp cloth and a neutral detergent. 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) The storage surface should be kept away from moisture, high temperature and strong magnetic fields.

2. Replace the battery
1) Press the POWER button to turn off the power supply, 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 and remove the battery cover.
3) Remove the batteries from the battery box.
4) Replace them 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 damage to the instrument due to electric shock or arc burns, it is necessary to replace the fuse according to the following process. Only standard type or standard electrical standard fuses can be used for replacement.
1) Press the POWER button to turn off the power supply, 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 standard type or standard electrical standard fuse. Make sure that the fuse is securely clamped at the base of the fuse clamp. Safety 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.