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Insulation Tester
Principles of Measurement and Resistance
21
Short circuit current ................................................>1 mA and <2 mA
Principles of Measurement and Resistance
The Tester measures insulation parameters and displays the results using with the following formulas.
Measurement Range Accuracy
Leakage Current 1 nA to 2 mA ±(20 % + 2 nA)
Capacitance 0.01 μF to 20.00 μF ±(15 % of reading + 0.03 μF)
Timer
Range Resolution
0 to 99 minutes
Setting: 1 minute
Indication: 1 second
Live circuit warning
Warning Range Voltage Accuracy
30 V to 1100 V ac/dc, 50/60 Hz ±(15 % + 2 V)
Ohm’s Law
Capacitance
(charge)
PI
(Polarization Index)
DAR
(Dielectric absorption ratio)
DAR [CN]
(Dielectric absorption ratio)
R =
V
I
C =
Q
V
PI =
R
@
10 min
R
@
1 min
DAR =
R
@
1 min
R
@
30 sec
DAR [CN]=
R
@ 1 min
R
@ 15 sec
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