UNIT:TEMPerature

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UNIT:TEMPerature

Syntax

UNIT:TEMPerature <units>[,(@<ch_list>) ]

UNIT:TEMPerature? [(@<ch_list>)]

Description

This command selects the temperature units (°C, °F, or Kelvin) on the specified channels. If you omit the optional <ch_list> parameter, this command applies to the currently defined scan list.

The following table shows which temperature transducers are supported by each of the multiplexer modules.

Module Thermocouple RTD 2-Wire RTD 4-Wire Thermistor

34901A Armature Multiplexer
Yes Yes Yes Yes

34902A Reed Multiplexer Yes Yes Yes Yes

34908A Armature Multiplexer (1-Wire) Not Recommended¹ Yes No Yes

Module	Thermocouple	RTD 2-Wire	RTD 4-Wire	Thermistor
34901A Armature Multiplexer	Yes	Yes	Yes	Yes
34902A Reed Multiplexer	Yes	Yes	Yes	Yes
34908A Armature Multiplexer (1-Wire)	Not Recommended¹	Yes	No	Yes

1With a one-wire multiplexer, even very small ground currents can introduce substantial measurement error.

Parameters

Name Type Range of Values Default Value

<units> Discrete {C|F|K}, for Celsius, Fahrenheit or Kelvin This is a required parameter.
The factory default is C.

<ch_list> Channel List
One or more channels, as shown:

(@310) - channel 10 on the module in slot 300.

(@305:310) - channels 05 through 10 on the module in slot 300.

(@202:207,209,302:308) - channels 02 through 07 and 09 on the module in slot 200 and channels 02 through 08 on the module in slot 300.
If you omit the optional <ch_list> parameter, this command applies to the currently defined scan list.

Name	Type	Range of Values	Default Value
<units>	Discrete	{C\|F\|K}, for Celsius, Fahrenheit or Kelvin	This is a required parameter. The factory default is C.
<ch_list>	Channel List	One or more channels, as shown: (@310) - channel 10 on the module in slot 300. (@305:310) - channels 05 through 10 on the module in slot 300. (@202:207,209,302:308) - channels 02 through 07 and 09 on the module in slot 200 and channels 02 through 08 on the module in slot 300.	If you omit the optional <ch_list> parameter, this command applies to the currently defined scan list.

Remarks

You can mix temperature units on different channels within the instrument and on the same module.
If the corresponding channels are not configured for temperature measurements prior to the sending of the UNIT:TEMPerature command, the instrument will dispatch an error message.
Setting the Mx+B (see CALCulate:SCALe:UNIT command) measurement label to °C, °F, or K has no effect on the temperature measurement units currently selected.
The CONFigure and MEASure? commands automatically select °C.
The instrument sets the temperature units to °C after a Factory Reset (*RST command). An Instrument Preset (SYSTem:PRESet command) or Card Reset (SYSTem:CPON command) does not change the setting.

Return Format

The query returns C, F, or K for each channel specified. Multiple responses are separated by commas.

Examples

The following command sets the temperature units to °F on channels 12 and 13 in slot 300.

CONF:TEMP TC,B, (@312,313)
UNIT:TEMP F,(@312,313)

The following query returns the temperature units selected on channels 12 and 13 in slot 300.

UNIT:TEMP? (@312,313)

Typical Response: F,F

UNIT:TEMPerature