User's Manual

150X Series
Calibration Manual
20
I Nominal Test
The following test verifies the UUT’s ability to maintain the nominal insulation test
current while loaded.
1. Connect the Fluke 5320A high resistance output terminals to the UUT
INSULATION and COM terminals.
2. Set the 5320A to the high resistance source function (H).
3. Set the 5320A for the Applied Load called out in Table 8 for Steps 1-5.
4. Press T and verify that the Fluke 5320A current reading is
> 1000.0 μA for steps 1-5.
Table 8. I Nominal Test/Limit Test
Step Function Range Applied Load 5320A Current Reading
1 Insulation 1000 V 1 MΩ
2 Insulation 500 V 500 kΩ
3
Insulation
(1507/1508)
250 V 250 kΩ
4
Insulation
(1507/1508)
100 V 100 kΩ
> 1000.0 μA
5
Insulation
(1507/1508)
50 V 50 kΩ > 1000.0 μA
I Limit Test
The following test verifies the UUT’s internal insulation function and current limit
operation.
1. Connect the Fluke 5320A high resistance output terminals to the UUT
INSULATION and COM terminals.
2. Set the Fluke 5320A to the high resistance source function (H) and 50 kΩ.
3. Set the UUT rotary switch to the 1000 V range.
4. Press and hold the T key.
5. The Fluke 5320A current reading should be <2000.0 μA.
Testing the Ohm Function
Earth Bond Resistance Accuracy Tests
To test earth bond resistance accuracy, complete the test steps in Table 9, using the
following procedure:
1. Connect the UUT
COM and Ω terminals to the Fluke 5320A low resistance
output terminals in a 4-wire configuration.
2. Set the Fluke 5320A to the low resistance source function (L).
3. Turn the UUT rotary function switch to the Ω function.
4. Apply the calibrator output listed in Table 9, Steps 1-3.