Measuring Polarization Index And Dielectric Absorption Ratios (Model 1507) - Fluke 1503 User Manual

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Users Manual
1507 INSULATION TESTER
Figure 7. Measuring Insulation Resistance
14
Measuring Polarization Index and
Dielectric Absorption Ratios (Model
1507)
Polarization Index (PI) is the ratio of the 10-minute
insulation resistance to the 1 minute insulation resistance.
Dielectric Absorption Ratio (DAR) is the ratio of the
1-minute insulation resistance to the 30 second insulation
resistance.
Insulation tests should only be performed on de-energized
circuits. To measure the polarization index or dielectric
absorption ratio:
1. Insert test probes in the
terminals.
Because of the time required to perform the PI
and DAR tests, use of test clips is recommended.
2. Turn the rotary switch to the desired test voltage
position.
Press the E button to select polarization index or
3.
bbw05f.eps
dielectric absorption ratio.
4. Connect the probes to the circuit to be measured. The
Tester automatically detects if the circuit is energized.
and input
INSULATION COM
Note