reedinstruments
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15
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black
Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
1. Press the PI/DAR button to select PI or DAR Measurement.
2. The LCD will display PI & Time1/Time2 or DAR & Time1/Time2.
3. To begin measuring, press and turn the “PRESS TO TEST” button
clockwise till it locks.
4. After testing, turn the button to counterclockwise to the initial posi-
tion. A beep will sound and will display “PASS if the reading is PI/
DAR>4, or “FAIL” if the reading is PI/DAR<1. The reading will hold
for 10 seconds.
PI standard
PI value 2 to 4 (typically3):
Considered as good insulation (older types)
PI value 1 to 1.5:
Not acceptable (older types)
PI value 1:
(Very high insulation resistance)
Modern type of (good) insulation systems
PI value 1.0 or less:
Fail
Example:
If measuring a B-class insulation material and the polarization
index is 1.1, the insulating material contains too much water or is seriously
polluted. The polarization index is below the minimum acceptable value
and you need to repair or replace parts.
DAR standard
DAR value 1.6 or more:
Excellent
DAR value 1.25 to 1.6:
PASS
DAR value <1.25 or less:
Fail
Use of Guard terminal
When measuring a cable, the leakage current flowing on the surface of
cable jacket and the current flowing inside the insulator combine and may
cause error in value. To prevent this error, wind a conductive wire around
the point where leakage current flows, then connect it to the Guard termi-
nal as shown in the figure below.
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