[SENSe:]TEMPerature:TRANsducer:FRTD:RESistance[:REFerence]
Syntax
[SENSe:]TEMPerature:TRANsducer:FRTD:RESistance[:REFerence] {<reference>|MIN|MAX|DEF} [, (@<ch_list>)]
[SENSe:]TEMPerature:TRANsducer:FRTD:RESistance[:REFerence]? [{(@<ch_list>)|MIN|MAX}]
Description
The resistance of an RTD is nominal at 0
Used With:
34921A Armature Multiplexer
34922A Armature Multiplexer
34923A Reed Multiplexer (differential mode only)
34924A Reed Multiplexer
Parameters
|
Name |
Type |
Range of Values |
Default Value |
|
<reference> |
Numeric |
Any value between 49Ω and 2.1 kΩ. |
Ro = 100Ω |
|
<ch_list> |
Numeric |
One or more channels in the form (@sccc). |
If <ch_list> is omitted, this command applies to the internal DMM. |
Remarks
If you omit the optional <ch_list> parameter, the configuration applies to the internal DMM, independent of any channels or a scan list (any existing scan list is not redefined). An error is generated if the internal DMM is not installed or is disabled.
Since 2-wire and 4-wire resistance are related functions, changing a measurement parameter for one function will also change the corresponding parameter for the other function (see [SENSe:]TEMPerature:TRANsducer:RTD:RESistance[:REFerence] command).
For 4-wire RTD measurements, the instrument automatically pairs channel n in Bank 1 with channel n+20 in Bank 2 (34921A, 34923A) or n+35 (34922A, 34924A) to provide the source and sense connections. For example, make the source connections to the HI and LO terminals on channel 2 in Bank 1 and the sense connections to the HI and LO terminals on channel 22 (or 37) in Bank 2. Specify the paired channel in Bank 1 (source) as the <ch_list> channel (channels in Bank 2 are not allowed in the <ch_list>).
Four-wire RTD measurements are not allowed on the multiplexer modules configured for the single-ended mode (see SYSTem:MODule:WIRE:MODE command).
The instrument sets the nominal resistance to 100Ω 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 command returns the nominal resistance setting in ohms for each channel specified. Multiple responses are separated by commas.
Examples
The following command sets Ro to 1000Ω on channels 3 and 13 in slot 1. Note that for this 4-wire measurement, channels 3 and 13 in Bank 1 are automatically paired with channels 23 and 33 in Bank 2, respectively (assumes 34921A).
TEMP:TRAN:FRTD:RES 1000,(@1003,1013)
The following query returns the Ro settings on channels 3 and 13 in slot 1.
TEMP:TRAN:FRTD:RES? (@1003,1013)
Typical Response: +1.00000000E+03,+1.00000000E+03