Iso-Tech IIT 1500 Manuel D'utilisation page 15

IIT 1500 English
Measuring PI/DAR
Press ≥ 2Sec
Press
Press ≥ 2Sec
PI(Polarization Index) = R10-min/R1-min
DAR(Dielectric Absorption Ratios) = R1-min/R30-sec
Where:
R10-min: the insulation resistance measured at 10 minutes after pressing the
TEST button.
R1-min: the insulation resistance measured at 1 minute after pressing the
TEST button.
R30-sec: the insulation resistance measured at 30 seconds after pressing the
TEST button.
If the reading for DAR is higher than 1.3 or PI is higher than 2, this indicates a
good level of insulation quality.
When the measured resistance is higher than the maximum range, the screen
will display "Err" symbol for PI/DAR value.
TEST button: Press once to start/interrupt the PI /DAR test.
Blue button: Press once during the PI/DAR test to display the remaining time of
the test.
14
M
V
DC
1
2
M
V
DAR
DC
3
2
1
M
V
PI
DC
2
3
Press
Press ≥ 2Sec
1
PI/DAR
LOCK