User's Manual

Insulation Testers
Calibration Adjustment
23
Restoring the Default Password
If you forget the calibration password, the default password (1234) can be restored using
the following steps.
XWWarning
To avoid electrical shock or personal injury, remove the test
leads and any input signal before removing the Tester's bottom
case.
1. Remove the back case from the UUT. Leave the PCA in the top case.
2. Apply 6.0 V across the battery contact pads (J8) + and − on the PCA.
See Figure 6.
3. Short across the Cal keypad (S8) on the back of the PCA. See Figure 6.
4. Turn the rotary knob from
OFF to V. The UUT will beep and display CAL. The
default password is now restored.
5. Remove the 6.0 V supply, turn the rotary switch to
OFF, and install the back case
on the UUT.
Battery Pads
Cal Keypad
ecz17f.eps
Figure 6. Restoring the Default Password