Keithley 2750 User Manual page 124

Model 2750 Multimeter/Switch System User's Manual
4-wire RTD connections
Shown in
switching module, paired channels are used to perform the 4-wire measurement. The two
input leads of the RTD are connected to a primary channel (1 through 10), while the two
sense leads are connected to its paired channel (11 through 20). Channel 1 is paired to
channel 11, channel 2 is paired to channel 12, and so on.
Figure 3-10
4-wire RTD connections
Model 2750
A. Front Panel Inputs
CH 11-20
B. Model 7700 Switching Module
Figure 3-10 are 4-wire RTD connections to the Model 2750. For the Model 7700
Sense HI
Input HI
Input LO
Sense LO
H
Model 7700
Switching
Module
L
SENSE
Sense Low
Sense High
4-wire
RTD
H
CH 1-10
L
INPUT
Input Low
4-wire
RTD
Input High
Basic DMM Operation 3-33