4.7-10 Section 4: Using the Model 9100: Resistance Function
Final Width = 215mm
4.7.5.6 2-Wire Connection
If it is deemed absolutely necessary to use a two wire connection, the 9100 should be
informed by de-selecting '
4 WIRE'. As illustrated in Fig.4.7.3, the 9100 will then
permanently short Hi to Hi Sense, and Lo to Lo Sense, so that at least the internal
protection circuitry is compensated. Measurements made by the UUT will, of course, still
include the resistance of the two interconnecting leads. Do not use 2-wire connections
when '
4 WIRE
' is selected on the 9100.
Fig. 4.7.3 Model 9100 2-Wire Configuration for Resistance Function
Model 9100
UUT
I
R
Hi Lo
Virtual R
T
Gain
Control
Total
Resistance
Demand
G
R
IN
R
SET
R
STD
0V 0V
I
R
V
R
Lead-Impedance Compensation Bridge
Voltage
Measurement
Resistance
Calculation
and Display
Pseudo
Constant
Current
Source
V
R
Ω
Com
Sense Hi Sense Lo
I
R
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