User's Manual

Insulation Testers
Performance Tests
19
Table 6. Source Voltage Accuracy Test, R-Nominal
Step UUT Function
Tester
Range
Applied
Load
5320A Display
Reading
UUT Display
Reading
UUT Voltage
Reading Error %
1 Insulation 1000 V 1 MΩ 1000 V to 1200 V 1000 V to 1200 V
2 Insulation 500 V 500 k 500 V to 600 V 500 V to 600 V
3
Insulation
(1507/1508)
250 V 250 kΩ 250 V to 300 V 250V to 300 V
4
Insulation
(1507/1508)
100 V 100 kΩ 100 V to 120 V 100 V to 120 V
5 Insulation
(1507/1508)
50 V 50 kΩ 50 V to 60 V 50 V to 60 V
Source Voltage Accuracy Test, Open Circuit
The open circuit source voltage accuracy can be determined, by calculation, using the
UUT Voltage Reading Error % previously noted. Complete the following test to verify
the actual open circuit source voltage.
1. Remove test leads from the UUT terminals.
2. Set the UUT rotary function switch to an insulation test function.
3. Press T and record the UUT display reading for each step in
Table 7.
4. Using the previously determined UUT 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 7. The formula is Recorded
UUT Display Reading x UUT Voltage Reading Error % + Recorded UUT
Display Reading.
Table 7. Source Voltage Accuracy Test, Open Circuit
Step Function Range
Recorded UUT
Display Reading
Calculated UUT Output
Voltage Limits
1 Insulation 1000 V 1000 V to 1200 V
2 Insulation 500 V 500 V to 600 V
3
Insulation
(1507/1508)
250 V 250 V to 300 V
4
Insulation
(1507/1508)
100 V 100 V to 120 V
5
Insulation
(1507/1508)
50 V 50 V to 60 V