I Limit Test; Testing The " " Function; Earth Bond Resistance Accuracy Tests - Fluke 150 Series Calibration Manual

Step
1.
2.
3.
4.
5.

I Limit Test:

Testing the "Ω" Function

Earth Bond Resistance Accuracy Tests

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Table 7. I Nominal Test/Limit Test
Function Range
Insulation 1000 V
Insulation 500 V
Insulation 250 V
Insulation
100 V
(1507/1508)
Remove the Calibrator and apply a separate 50 kΩ resistor for the following test
Insulation
50 V
(1507/1508
The following test verifies the UUT's internal insulation function and current limit
operation.
1. Connect the DMM and 50-kΩ resistor to the UUT
terminals as shown in Figure 8.
2. Set DMM function switch to µADC.
3. Set the UUT rotary switch to the 1000 V range.
4. Press and hold the T key.
5. The DMM reading should be <2000.0 µA.
To test earth bond resistance accuracy, complete the test steps in Table 8, using the
following procedure.
1. Connect the UUT
2. Set the calibrator to the Ohms function.
3. Turn the UUT rotary function switch to the Ω function.
4. Apply the calibrator output for Steps 1-3.
5. Press the T key, and verify that the UUT reading is within the display
reading limits shown in Table 8.
6. Apply a separate 2-Ω precision resistor directly to the UUT
terminals using the shortest leads possible to minimize lead resistance, or press
the blue key to zero out the test leads prior to connecting to the resistor.
7. Press T, and verify that the reading is within the display reading limits for
Step 4.
Applied Load
1 MΩ
500 kΩ
250 kΩ
100 kΩ
50 kΩ
and Ω terminals to the calibrator.
COM
Insulation Testers
Performance Tests
DMM Display Reading
>1000
>1000
and
INSULATION COM
Ω and COM
25