Keithley 2750 - Page 121

3-30 Basic DMM Operation Model 2750 Multimeter/Switch System User’s Manual
Figure 3-8
Thermocouple connections
Thermocouple
Ice Bath
Model 2750
A. Simulated Reference Junction (Front Panel Inputs)
H
L
CH 1-10
Model 7700
Switching
Module
H
L
CH 11-20
D. Channel Average Calculation, Internal Reference Junction (Model 7700)
Thermocouple
Thermocouple
Thermocouple
C. Internal Reference Junction (Model 7700)
H
L
CH 1-20
Model 7700
Switching Module
Thermocouple
Ice Bath
Copper wire to thermocouple
wire connection (one of two).
B. Simulated Reference Junction (Model 7700)
H
L
Model 7700
Switching Module
Copper
Wires
CH 1-20
Copper
Wires
Copper wire to thermocouple
wire connection (one of two).
Input HI
Input LO
+
-
+
+
++
-
-
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2750-900-01.book Page 30 Wednesday, August 3, 2011 7:56 AM