Principle Of Measurement And Resistance - Fluke 1550C Calibration Manual

1550C/1555
Calibration Manual
Leakage Current
Measurement
Capacitive
Measurement
Timer
Live circuit warning
Short circuit current

Principle of Measurement and Resistance

The product measures insulation parameters and displays the results with the
following formulas.
Ohm's
Law
V
R =
I
22
Range
1 nA to 2 mA
0.01 μF to 20.00 μF
Range
0 to 99 minutes
Warning Range
30 V to 1100 V ac/dc, 50/60 Hz
>1 mA and <2 mA
PI
Capacitance
(Polarization
(charge)
Index)
R
Q
@
C = PI =
V R
DAR
(Dielectric absorption
ratio)
10 min
R
@
DAR =
1 min R
@
@
Accuracy
±(20 % + 2 nA)
±(15 % of reading + 0.03 μF)
Resolution
Setting: 1 minute
Indication: 1 second
Voltage Accuracy
±(15 % + 2 V)
DAR [CN]
(Dielectric absorption
ratio)
1 min R
DAR [CN]=
30 sec R
1 min
@
15 sec
@