I Nominal Test - Fluke 150 Series Calibration Manual

Step
1.
2.
3.
4.
5.

I Nominal Test:

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3. Using the previously determined Meter Voltage Reading Error %, calculate the
actual open circuit output voltage for each voltage range. Verify that the
calculated value is within the limits shown in Table 6. The formula is UUT
Recorded Reading x UUT Voltage Reading Error % + Recorded UUT Display
Reading.
Table 6. Source Voltage Accuracy Test, Open Circuit
Function Range
Insulation 1000 V
Insulation 500 V
Insulation
250 V
(1507/1508)
Insulation
100 V
(1507/1508)
Insulation
50 V
(1507/1508)
The following test verifies the UUT's ability to maintain the nominal insulation test
current while loaded.
1. Connect the DMM and Calibrator to the UUT
as shown in Figure 8.
2. Set the calibrator to an insulation resistance test function.
3. Set the calibrator for the insulation resistance called out in Table 7 for Steps 1-4.
4. Set the DMM function switch to µADC.
5. Press the T key and verify that the DMM display reading is
> 1000.0 µA for steps 1-4.
6. Disconnect the calibrator and replace it with a separate 50-kΩ resistor.
7. Set the UUT to the 50 V range and press the T key. Verify that the DMM
display reading is > 1000.0 µA for step 5.
Recorded UUT
Display Readings
INSULATION
Insulation Testers
Performance Tests
Calculated UUT Output
Voltage Limits
1000 V to 1200 V
500 V to 600 V
250 V to 300 V
100 V to 120 V
50 V to 60 V
and terminals
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