Repair and maintenance of an insulation resistance test set
General maintenance and upkeep
1) Regularly clean the outer shell of the instrument with a damp cloth and neutral cleaning agent, do not use abrasives or solvents. Dirt on the terminals and probe terminals can affect the reading, so cleaning agents can be used to clean the dirt on each terminal.
2) When not in use, press the POWER button to turn off the power. If used for a long time, remove the battery.
3) Instruments should be stored away from moisture, high temperatures, and strong magnetic fields.
Replacing the battery
1) Press the POWER key to turn off the power and remove the probe or test wire from the terminal, completely disconnecting the test wire from the circuit being tested.
2) Remove the two screws of 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 (with a standard capacity of approximately 2450mAh).
5) Close the battery cover and install two screws.
Replace the fuse
To avoid personal injury or instrument damage caused by electric shock or arc, it is necessary to replace the fuse according to the following steps. Only fuses of the same model or electrical specifications can be used for replacement.
1) Press the POWER key to turn off the power and remove the probe or test wire from the terminal, completely disconnecting the test wire from the circuit being tested.
2) Remove the two screws on the battery cover, two screws on the back cover of the housing, and 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 burnt out fuse, and replace it with a fuse of the same model or electrical specification. Confirm that the fuse is securely clamped in the middle of the fuse clip. Insurance specification: F1A240V.
4) After closing the battery cover and the back cover of the housing, tighten the four screws. Do not use the instrument panel until it is locked.
