[SENSe:]TEMPerature:TRANsducer:FRTD:TYPE
Syntax
[SENSe:]TEMPerature:TRANsducer:FRTD:TYPE <type> [, (@<ch_list>)]
[SENSe:]TEMPerature:TRANsducer:FRTD:TYPE? [(@<ch_list>)]
Description
This command selects the RTD type for 4-wire temperature measurements on the specified channels. If you omit the optional <ch_list> parameter, this command applies to the internal DMM, independent of any channels or a scan list.
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 |
|
<type> |
Discrete |
85 | |
|
<ch_list> |
Numeric |
One or more channels in the form (@sccc). |
If <ch_list> is omitted, this command applies to the internal DMM. |
|
* Using IPTS-68 software conversions. |
|||
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.
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 supports RTDs with Alpha = 0.00385 (DIN/IEC 751) using ITS-90 software conversions or Alpha = 0.00391 using IPTS-68 software conversions.
"PT100" is a special label that is sometimes used to refer to an RTD with Alpha = 0.00385 and Ro = 100Ω.
The instrument sets the RTD type to "85" 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 "+85" or "+91" for each channel specified. Multiple responses are separated by commas.
Examples
The following command selects Type 85 RTDs 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:TYPE 91,(@1003,1013)
The following query returns the RTD type selections on channels 3 and 13 in slot 1.
TEMP:TRAN:FRTD:TYPE? (@1003,1013)
Typical Response: +91,+91