User's Manual

Insulation Testers

Disassembling and Reassembling the Tester

Removing the Battery Door

XWWarning

To avoid the risk of electrical shock, turn the rotary switch to

OFF, and remove the test leads from the front-panel terminals

before removing the battery cover.

With the boot removed, the next step in disassembling the Tester is to remove the battery

door. Use the following procedure to remove the door:

1. Locate the black slotted lock on the lower rear of the Tester.

2. Using a standard screwdriver, turn the battery-door lock until the unlock symbol

aligns with the arrow. The door is now unlocked.

3. Lift the bottom of the battery door away from the Tester. Removing the battery door

provides access to the fuse and battery compartment.

4. If necessary, remove and replace the batteries and fuse as shown in Figure 1.

Note

To install the battery door, slide the top of the door into position and secure

it by turning the battery door lock until the lock symbol (L) aligns with the

arrow.

Opening the Bottom Case

With the battery door removed, the next step in disassembling the Tester is to remove the

bottom case. Use the following procedure to remove the bottom case:

Note

When removing the back cover, it is unnecessary to remove the fuse or the

batteries.

1. Locate the four Philips head screws on the bottom case (two are next to the batteries

and two are next to the fuse).

2. Using a Philips screwdriver, remove the four screws.

3. Separate the front and bottom cases at the fuse-end the Tester. Tilt the freed end of

the cover up, and lift it away from the top case.

Note

To install the bottom case, first, position and press together the display-end

of the top and bottom cases. Before installing all four screws, press the

fuse-end of the covers together.

Removing the PCA

With the bottom case removed, the next step in disassembling the Tester is to remove the

printed circuit assembly (PCA). Refer to Figure 3 for the exploded part view and use the

following procedure to remove the PCA:

1. One Philips screw attaches the PCA to the top case. Locate the screw near the center

of the PCA, and remove it.

2. Two chrome plated springs on the PCA form an electrical connection (clip) to the

two recessed INSULATION(+) terminals on the top case. Break these connections by

carefully pulling each of the springs back and away from the terminals. See Figure 4.