Conventional insulation testers are highly susceptible to
damage when testing insulation resistance while voltage
is present on the measured object (whether ACV or DCV).
To safely prevent damage, this new line of testers has the
unique ability to sense voltage on a measured object. If
any voltage is sensed, the tester will automatically switch
to voltage detection mode and display the voltage finding
on the LCD screen. This allows the user to prevent damage
caused by attempting to measure insulation resistance
while voltage is present.
The Polarization Index is the ratio of the insulation
resistance measured at 10 minutes divided by the
insulation resistance measured at 1 minute.
One minute after starting a test, the resistance value is
saved and the DAR is displayed. The test then continues,
and after 10 minutes, the tester will beep again, indicating
that the PI result has been computed. T