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

1507 INSULATION TESTER
Figure 7. Measuring Insulation Resistance
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Measuring Polarization Index and Dielectric Absorption Ratios (Model 1507)

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.
2.
3.
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Insert test probes in the
INSULATION
terminals.
Note
Because of the time required to perform the PI
and DAR tests, use of test clips is recommended.
Turn the rotary switch to the desired test voltage
position.
Press the  button to select polarization index or
dielectric absorption ratio.
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