Fluke 9100 - Page 296

4.18-12 Section 4: Using the Model 9100: Insulation/Continuity Function (Option 135)
4.18.7 Operation of Insulation Resistance
4.18.7.1 Overview
The following simplified diagram shows the operation of an insulation tester in conjunction
with the Option 135 high voltage active ohms circuit.
Fig. 4.18.2: Model 9100 Option 135 Configuration for Insulation Function
I I
HiLo
Model 9100
Option 135
Virtual R I
Gain
Control
Total
Resistance
Demand
g
R IN
R SET
R STD
0V 0V
I I
V I
Voltage
Measurement
Calculation
and Display
Pseudo
Constant
Voltage
Source
V I
−
+
R S
UUT
AA
AA
High Voltage
Output Amplifier
+
−
Voltage and
Current
Measurement
Display