8. At the end of 60-seconds, read and record the insulation
resistance value.
9. Apply temperature correction factor and record results
on PM Chart (Fig 4).
This chart interprets some possible data.
PM Data
(Fig 3)
21
Megohms
Humidity Induced
Dip
Failed Motor
Replaced
Motor Replaced Before Failure
Uncharacteristic change
indicates imminent
failure
