Polarization Index (Pi) - Circutor MI20KVe Manual De Uso

7. Always remember to multiply the reading by the factor stated in the
following table, depending on selected test voltage.
8. When key C x 10 is used, reading shall be carried out in range C and
shall be multiplied by 10, in addition to the factor corresponding to the
test voltage.
9. When you press Stop key, the insulation tester will start discharging
the potentials accumulated in the apparatus internal capacitances and
in those of the element under test as well. When this discharging pro-
cess is over (up to 60 seconds after turn off) the High voltage will turn
off automatically. The test leads may be disconnected. To finish meas-
urement press On/Off switch ().

6. Polarization index (PI)

For this type of test, the instrument must be connected and applying high
voltage to the sample for 10 minutes. The polarization index is the ratio
between the insulation resistance value measured after 10 minutes and
the value measured after 1 minute.
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