Fluke 1550C - Principle of Measurement and Resistance

Insulation Tester
Principle of Measurement and Resistance
21
Range Accuracy
Leakage Current
Measurement
1 nA to 2 mA ±(20 % + 2 nA)
Capacitive
Measurement
0.01 μF to 20.00 μF ±(15 % of reading + 0.03 μF)
Range Resolution
Timer
0 to 99 minutes
Setting: 1 minute
Indication: 1 second
Warning Range Voltage Accuracy
Live circuit warning
30 V to 1100 V ac/dc, 50/60 Hz
±(15 % + 2 V)
Short circuit current > 1 mA and < 2 mA
Principle of Measurement and Resistance
The product measures insulation parameters and displays the results using with the
following formulas.
Ohm’s Law
Capacitance
(charge)
PI
(Polarization Index)
DAR
(Dielectric absorption ratio)
I
V
R =
V
Q
C =
min1
min10
×
×
=
R
R
PI
sR
R
DAR
30
min1
×
×
=