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Insulation Multimeter
Basic Measurements
27
bav13f.eps
Figure 9. Testing Insulation
PI/DAR
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
p and q input terminals.
Note
Because of the time required to perform the PI and
DAR tests, use of test clips is recommended.
2. Press r repeatedly to select the test voltage.
3. Press to select polarization index or dielectric
absorption ratio.
4. Connect the probes to the circuit to be measured. The
Tester automatically detects if the circuit is energized:
• The primary display shows ---- until you press the
button and a valid resistance reading is
obtained.
• The high voltage symbol (Z) and a primary display
of >30 V warns if voltage greater than 30 V ac or
dc is present. If high voltage is present, the test is
inhibited.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct
.com
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