Model 2701 User’s Manual Basic DMM Operation 3-33
For remote programming, the following commands are valid with a 7701 module
installed:
SYSTem:FRESistance:TYPEx, NORMal ‘ Select normal 4W mode.
SYSTem:FRESistance:TYPEx, CSIDe ‘ Select common-side 4W mode.
SYSTem:FRESistance:TYPEx? ‘ Query 4W mode.
Where the x in TYPEx is the slot number for the 7701 module.
NOTE Details on 4-wire common-side ohms measurements using the 7701 module are
provided in the manual (packing list) supplied with the module.
Temperature measurements
The Model 2701 can measure temperature using thermocouples, thermistors, and 4-wire
RTDs. When deciding which temperature sensor to use, keep in mind that the
thermocouple is the most versatile, the thermistor is the most sensitive, and the 4-wire
RTD is the most stable.
Thermocouples
For thermocouples, temperature measurement range depends on which type of
thermocouple is being used. Thermocouples that are supported include types J, K, N, T, E,
R, S, and B.
When two wires made up of dissimilar metals are joined together, a voltage is generated.
The generated voltage is a function of temperature. As temperature changes, the voltage
changes. The thermocouple voltage equates to a temperature reading. This is the basic
operation principle of the thermocouple.
NOTE The equation to calculate thermocouple temperature is provided in Appendix F.
Type Range Resolution
J -200°C to 760°C 0.001°C
K -200°C to 1372°C 0.001°C
N -200°C to 1300°C 0.001°C
T -200°C to 400°C 0.001°C
E -200°C to 1000°C 0.001°C
R 0°C to 1768°C 0.1°C
S 0°C to 1786°C 0.1°C
B +350°C to 1820°C 0.1°C
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