[SENSe:]TEMPerature:TRANsducer:RTD:RESistance[:REFerence]
[SENSe:]TEMPerature:TRANsducer:RTD:RESistance[:REFerence]
[SENSe:]TEMPerature:TRANsducer:FRTD:RESistance[:REFerence]
Syntax
[SENSe:]TEMPerature:TRANsducer:RTD:RESistance[:REFerence] <reference>[,(@<ch_list>)]
[SENSe:]TEMPerature:TRANsducer:RTD:RESistance[:REFerence]? [(@<ch_list>)]
[SENSe:]TEMPerature:TRANsducer:FRTD:RESistance[:REFerence] <reference>[,(@<ch_list>)]
[SENSe:]TEMPerature:TRANsducer:FRTD:RESistance[:REFerence]? [(@<ch_list>)]
Description
The resistance of an RTD is nominal at 0 °C and is referred to as Ro. These commands select the nominal resistance (Ro) for 2-wire (RTD) or 4-wire (FRTD) measurements on the specified channels.
Used With:
- 34901A 20 Channel Multiplexer (2/4-wire) Module
- 34902A 16 Channel Multiplexer (2/4-wire) Module
- 34908A 40 Channel Single-Ended Multiplexer Module (RTD only; not FRTD)
Parameters
Name Type Range of Values Default Value <reference> Numeric A number (of ohms) between 49 and 2100. 100 <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
- Because 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.
- For 4-wire resistance measurements, the instrument automatically pairs channel n in Bank 1 with channel n+10 in Bank 2 (34901A) or n+8 (34902A) to provide the source and sense connections. For example, make the source connections to the HI and LO terminals on channel 02 in Bank 1 and the sense connections to the HI and LO terminals on channel 12 (34901A) or 10 (34902A) 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>).
- 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 returns the nominal resistance a value of the form +1.00000000E+02. Multiple values are separated by commas.
Examples
In each of the following examples, you could substitute the node name FRTD for RTD.
The following command sets the nominal resistance to 75Ω on channels 01 through 04 in slot 200.
TEMP:TRAN:RTD:RES:REF 75,(@201:204)
The following query returns the reference resistance for the four channels shown.
TEMP:TRAN:RTD:RES:REF? (@201:204)
Typical Response: 7.50000000E+01,7.50000000E+01,7.50000000E+01,7.50000000E+01