Tenma 72-9405 - Timed Measurement; Polarization Index (PI) Measurement

Timed Measurement
•
Press TIME button to select the timed mode, the LCD displays TIME 1 and
symbol.
•
Press
and
buttons to set the time (00:10~15:00). Within 1 minute, the
time increment or decrement by every 5s. Afterward, the time increment or
decrement by every 30s.
Then press and hold TEST button for 2s to carry out timed measurement.
•
TIME 1 and
display and blink on the LCD every 0.5s.
•
When the set time is reached, the test voltage output will be turned off, and
the measurement will be automatically stopped. The LCD displays the
insulation resistance reading.
Polarization Index (PI) Measurement
•
Press TIME button to select the timed mode, the LCD displays TIME 1 and
symbol.
•
Press
and
buttons to set the time (00:10~15:00). Within 1 minute, the
time increment or decrement by every 5s. Afterward, the time increment or
decrement by every 30s.
•
•
Press TIME button again. TIME 2, PI and
symbol appear on the LCD.
Press
and
buttons to set the time (00:15~15:30). Within 1 minute, the
time increment or decrement by every 10s. Afterward, the time increment
or decrement by every 30s.
Then press and hold TEST button for 2s to carry out the measurement.
•
•
TIME 1 and
display and blink on the LCD every 0.5s before TIME 1 set
time is reached.
•
TIME 2 and
display and blink on the LCD every 0.5s before TIME 2 set
time is reached.
•
When the set time of TIME 1 & 2 is reached, the test voltage output will be
turned off, and the measurement will be automatically stopped. The LCD
displays the polarization index reading.
•
Press
to step through the polarization index, TIME 2 and TIME 1
insulation resistance readings.
Calculation tips:
PI=3-minute~10- minute resistance / 30-second~1-minute resistance
6
PI
4 or more
4~2
2.0~1.0
1.0 or less
Standard
Best
Good
Warning
Bad