Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User’s Manual Basic DMM Operation 3-33
4-wire RTD connections
Shown in Figure 3-10 are 4-wire RTD connections to the Model 2750. For the Model 7700
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
Input HI
Input LO
Sense HI
Sense LO
4-wire
RTD
A. Front Panel Inputs
4-wire
RTD
B. Model 7700 Switching Module
H
L
CH 1-10
Model 7700
Switching
Module
H
L
CH 11-20
INPUTSENSE
Input High
Sense High
Input LowSense Low
2750-900-01.book Page 33 Wednesday, August 3, 2011 7:56 AM

Keithley 2750 Specifications

General

Interface	GPIB, RS-232, Ethernet
Switching Speed	Up to 500 channels/second
Maximum Voltage	300V
Operating Temperature	0°C to 50°C
Measurement Functions	DCV, ACV, DCI, ACI, 2-wire Resistance, 4-wire Resistance, Frequency, Temperature
Resolution	6.5 digits
Current	1A
Maximum Current	1A