Uniks ISO-5, Руководство по эксплуатации

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Because there are a lot of parameters to be displayed they have been divided into three
sub screens which can be scrolled using the scrolling arrows. Figure shows the sequence
of the screens along with the parameters displayed on the corresponding screen.
SCREEN 1
VOLTAGE
AT LEADS
/DUT
SCREEN 2
VOLTAGE
DURING
TEST
SCREEN 3
SET
VOLTAGE
DAR
INFORMATION
PI
INFORMATION
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You can save the data of this test by pressing the button. After pressing this button
a message will appear to tell you about the fi le number. You can press the OK button on
the message box in order to go back to the measurement screen.
5.3 PI Mode:
PI(Polarization Index) is defined as the ratio of insulation resistance at 10 minute
divided by insulation resistance at 1 minute. It is very useful to know the condition of the
insulation. It can be expressed in formula as:
PI = IR10min / IR1min