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Conﬁguration

The following provides the various conﬁguration options for temperature measurements. To

select and conﬁgure either a thermocouple or four-wire RTD measurement:

Press SHIFT then SENSOR. Four choices are available using the ▲ and ▼ keys:

• UNITS — C, K, F (Centigrade, Kelvin, Fahrenheit). This parameter selects the displayed

units for temperature measurements.

• SENSOR — TCOUPLE, 4W-RTD (sensor type). This parameter selects the type of

sensor being used.

• TYPE — J, N, T, K (thermocouple type) or PT100, USER, PT3916, PT385, F100, D100

(4W-RTD type). Note that with USER selected, you must set the Alpha, Beta, Delta, and

RZero values from over the GPIB bus or the RS-232 Interface (see “USER RTD Type”

for details).

• JUNC — SIM, CH1 (simulated or referenced at Channel 1). Typically, a thermocouple

card uses a single reference junction. The Model 2010 can simulate a reference junction

temperature or use the reference junction on a thermocouple switching card. Typical

reference junction temperatures are 0°C and 23°C. In order to keep the reference

calculations updated and accurate, Channel 1 needs to be read periodically.

To assign a value to a parameter, use the ▲ and ▼ keys to scroll to the desired parameter.

Select the key, and use the ▲ and ▼ keys to scroll through and choose the preferred value.

Select the ENTER key to save your changes.

USER RTD Type

Alpha, Beta, Delta, and RZero values for the USER RTD type cannot be set from the front

panel. These values can only be set remotely from the GPIB bus or the RS-232 Interface. After

selecting USER, use the following commands to set the RTD factors:

[:SENSe[1]]:TEMPerature:FRTD:ALPHa <NRf> Specify alpha value (0 to 0.01)

[:SENSe[1]]:TEMPerature:FRTD:BETA <NRf> Specify beta value (0 to 1.00)

[:SENSe[1]]:TEMPerature:FRTD:DELTa <NRf> Specify delta value (0 to 5.00)

[:SENSe[1]]:TEMPerature:FRTD:RZERo <NRf> Specify resistance at 0° C (0 to 10000)

NOTE For details on these commands, see “FRTD commands” in the SENSe Subsystem

(Section 5).

Math

Model 2010 math operations are divided into four categories:

• mX+b and percent

• dBm and dB calculations

• Statistics of buffered readings

• Limit testing

2-32 Basic Measurements

Keithley 2010 User Manual

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