[SENSe:]TEMPerature:TRANsducer:RTD:OCOMpensated
[SENSe:]TEMPerature:TRANsducer:RTD:OCOMpensated
[SENSe:]TEMPerature:TRANsducer:FRTD:OCOMpensated
Syntax
Syntax
[SENSe:]TEMPerature:TRANsducer:RTD:OCOMpensated <mode> [, (@<ch_list>)]
[SENSe:]TEMPerature:TRANsducer:RTD:OCOMpensated? [(@<ch_list>)]
[SENSe:]TEMPerature:TRANsducer:FRTD:OCOMpensated <mode> [, (@<ch_list>)]
[SENSe:]TEMPerature:TRANsducer:FRTD:OCOMpensated? [(@<ch_list>)]
Description
Offset compensation removes the effects of any DC voltages in the circuit being measured. The technique involves taking the difference between two resistance measurements on the specified channels, one with the current source turned on and one with the current source turned off.
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
<mode>
Boolean
{OFF|0|ON|1}
OFF|0
<ch_list>
Numeric
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 <ch_list> is omitted, this command applies to the current scan list.
Remarks
- This command applies only to 2-wire and 4-wire RTD measurements on the 100Ω, 1 kΩ, and 10 kΩ ranges. Once enabled, offset compensation is applied to both 2-wire and 4-wire RTD measurements on the specified channels.
- 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 disables offset compensation 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 "0" (OFF) or "1" (ON) for each channel specified. Multiple responses are separated by commas.
Examples
The following command enables offset compensation on channels 3 and 13 in slot 1. For this 4-wire measurement, the instrument automatically pairs these channels in Bank 1 with the corresponding channels in Bank 2.
TEMP:TRAN:FRTD:OCOM ON,(@103,113)
The following query returns the offset compensation settings on channels 03 and 13 in slot 100.
TEMP:TRAN:FRTD:OCOM? (@103,113)
Typical Response: 1,1