Principle Of Measurement And Resistance - Fluke 1537-II User Manual

1535/1537/1537-II
Users Manual

Principle of Measurement and Resistance

The Tester uses these formulas to measure insulation parameters and display
the results:
Ohm's Law
Capacitance
(Charge)
PI
(Polarization Index)
DAR
(Dielectric Absorption Ratio)
DD
(Dielectric Discharge)
32
V
R =
I
Q
C
V
R
10 min
PI =
R
1 min
R
1 min
DAR
[CN]
R
15 s
I
DD =
V × C
I = current after 1-minute discharge
V = voltage before discharge
C = measured object capacitor
R
1 min
DAR
R
30 s