Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User’s Manual Basic DMM Operation 3-29
ence junction may be inconvenient but it will provide more accurate temperature measure-
ments (assuming the user enters a precise reference temperature).
With open thermocouple detection disabled, the Model 2750 can calculate the average
temperature of two thermocouple channels using Channel Average (see Section 5 for
details). As shown in Figure 3-8D, one thermocouple is connected to a primary channel (1
through 10), and the other thermocouple is 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. Keep
in mind that a simulated reference junction (i.e. ice bath) can instead be used for these
thermocouple temperature measurements.
2750-900-01.book Page 29 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