4-8
FIGURE 18: Polarization Index Testing Screen
The Polarization Index Testing Screen (Figure 18) will display during the duration of the P.I. test. Real time
data of the output voltage, current, and resistance measured with the Megohmmeter is displayed. The Intra-
Test Printing function works differently during the P.I. test. If
“P” is depressed during a test, the printer will
print resistance results every minute until the test is complete. Otherwise, pressing
“P” at the Test
Completion page will print the results of the P.I. test with each of the per-minute results all at once.
NOTE: Pressing the HV OFF button
OR
the STOP key on the keypad will end the test early and bring up the
Test Completion Page.
FIGURE 19: Polarization Index Test Completion Page
After the P.I. test is completed, the result is displayed (Figure 19) and the operator may print or save the
result. Either printing or saving to the SD Card will give the operator results for every minute in addition to the
final PI reading. The PM15-4A will discharge the test object upon test completion. Depending on the size of
load capacitance, dangerous voltages may be present at the end of the lead for a few moments. Always
ground any high voltage leads before removing leads from test object. The use of appropriately rated
discharge and grounding devices is recommended to ensure that the test object is fully discharged and
grounded before removing leads after testing is complete. A minimum discharge time which is approximately
4 times that of the voltage application duration is recommended.
