5320A
Users Manual
7-8
Calibrating Insulation Resistance Testers with the
Resistance Multiplier
WX Warning
To avoid electric shock, connect the Resistance Multiplier
Adapter chassis to protective earth ground (PE). The ground
terminal on the rear panel of the Calibrator can also be used for
this purpose.
The Calibrator’s Resistance Multiplier adapter is used to increase the range of high
resistance source from 350 MΩ to 10 TΩ. To make an Insulation Resistance calibration
with the Resistance Multiplier:
1. Using Figure 7-7 or 7-8, connect the UUT to the resistance multiplier adapter and the
Calibrator.
Note
When using the Resistance Multiplier while calibrating 3-terminal
megohmeters, a common (ground) terminal is required.
2. Press H.
3. If Short is displayed, press the Mode softkey. Then, using the cursor keys or rotary
knob, highlight Resistance and select it by pressing the Select softkey or pushing
in on the rotary knob.
Note
For correct readings, the high resistance source grounding must be turned
off. Refer to Chapter 4 for changing the grounding setting of the high
resistance calibration function.
4. If YES is not already displayed after R Multiplier in the PARAMETERS area of the
display, press the R Mult. softkey.
5. If necessary, adjust the value for desired resistance.
6. Press O.
W Caution
When using the Resistance Multiplier, the Calibrator cannot
monitor UUT scan test voltage. To avoid possible damage to
the adapter and Calibrator, do not exceed maximum peak
voltage of 5500 V on the input terminals of the resistance
multiplier.
7. Activate the measurement on the UUT by pressing its start or test button.
8. Compare the UUT reading with the resistance value in the output area of the display.
9. Press S to disconnect the output terminals from the UUT.
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