KYORITSU 3126 - Manual (Page 20)

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(3) Press the FILTER button and confirm the selection.
Selected DAR time is saved and kept after the instrument is
powered off.
To check the time currently selected, follow the step (1)
described as above.
3. How to measure DAR/ PI
DAR and PI are measured automatically at normal continuous
measurement of insulation resistances. Set the Range switch to
any range and measure the test object continuously.
- 1 min after a start of continuous measurement:
LCD shows DAR value.
- 10 min after a start of continuous measurement:
LCD shows PI value.
When DAR/PI values are displayed as “no”:
DAR and PI values are determined by the methods 1. and 2. as
described above, therefore, they are displayed as “no” when the
measured insulation resistances fall under any of following cases.
(1) measured value is “0.0MΩ”
(2) measured value is “OL”
* “OL” is displayed when the measured value exceeds the upper
limit of the measuring range at each insulation resistance range.
Range Upper limit
500V
999MΩ
1000V
1.99GΩ
2500V
99.9GΩ
5000V
1000GΩ