[SENSe:]TEMPerature:TRANsducer:{RTD | FRTD}:REFerence {OFF | ON} [, (@<ch_list>)]
[SENSe:]TEMPerature:TRANsducer:{RTD | FRTD}:REFerence? [(@<ch_list>)]
Only supported in DAQM901A, DAQM902A, and DAQM908A multiplexer modules.
Parameter is shared between RTD and FRTD measurements. Setting or querying the parameter with the RTD
version of this command is identical to setting or querying it with the FRTD version.
This command is not supported in DMM Digitize data acquisition mode.
Error -221,"Settings conflict; DMM digitizing mode has been disabled" will be generated when you send the
command to enable the 2-wire or 4-wire RTD channel to be used as the reference channel in DMM Digitize
mode.
Enables (On) or disables (Off) the specified 2-wire RTD and 4-wire RTD channels to be used as the reference channel
for subsequent thermocouple measurements that specify an external reference source (see [SENSe:]TEMPer-
ature:TRANsducer:TCouple:RJUNction:TYPE command). The query returns the reference state as 0 or 1.
Parameter Typical return
{OFF | ON}
Default: OFF
0 (OFF) or 1 (ON)
For the below examples, you can replace the RTDnode with FRTD for a similar explanation on 4-wire RTD.
Example : Makes an externally-referenced thermocouple measurements with multiplexer channels
The following commands configure multiplexer channel 3 in slot 1 for thermocouple measurements and select an
external reference junction for that channel.
CONF:TEMP TC,J,(@103)
TEMP:TRAN:TC:RJUN:TYPE EXT,(@103)
The following commands configure multiplexer channel 1 in slot 1 for 2-wire RTD measurements and assign this
channel as the reference channel. For this 2-wire measurement, the instrument automatically pairs this channel in
Bank 1 with the corresponding channel in Bank 2.
CONF:TEMP RTD,85,(@101)
TEMP:TRAN:RTD:REF ON,(@101)
The following commands set up a scan list that contains both the reference channel (channel 1) and the ther-
mocouple channel (channel 3). If you do not include the reference channel in the active scan list, the instrument
uses the temperature previously saved in the reference register. The INITiate command initiates the scan.
ROUT:SCAN (@101:105)
INIT
–
If you omit the optional <ch_list> parameter, this command applies to the internal DMM, independent of any
channels or a scan list. An error is generated if the internal DMMis disabled.
Keysight DAQ970A/DAQ973A Programming Guide 263
2 SCPI Programming
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