MD 9070 Insulation/Continuity Digital Multimeter
Operation
16
PI/DAR mode
PI
(
P
olarization
I
ndex) is the ratio of the 10-minute insulation resistance to the 1-minute
insulation resistance.
DAR
(
D
ielectric
A
bsorption
R
atios) is the ratio of the 1-minute insulation resistance to the
30-second insulation resistance.
A general guide to interpret the PI or DAR test results are:
Insulation
Condition
PI (Polarization
Index)
DAR
(Dielectric
Absorption Ratios)
Dangerous
< 1,0
-
Questionable
< 2,0
< 1,3
Good
< 4,0
< 1,6
Excellent
> 4,0
> 1,6
Press the
PI/DAR
button momentarily to enable PI mode with the LCD annunciator
turned on. Press momentarily again toggles to the DAR mode with the LCD annunciator
turned on. The secondary display shows the measuring lap times of
10’00”
and
01’00”
for PI and DAR modes respectively.
Then, activate Lock-Test mode
&
to start PI or DAR count-down
measurements. The timer on the secondary display started to count down. The primary
display shows the real-time resistance readings until the timer shows
00’00”
for a result.
The maximum display result is “
5,0
”, and the display shows
“> 5,0
” for results beyond
that. If the measured resistance reading is over-range, the meter will stop
and
display “
Err
”. Press the
PI/DAR
button for 1 second or more to exit.
