[SENSe:]RESistance:RANGe:AUTO
[SENSe:]RESistance:RANGe:AUTO
[SENSe:]FRESistance:RANGe:AUTO
Syntax
[SENSe:]RESistance:RANGe:AUTO <state>[,(@<ch_list>)]
[SENSe:]RESistance:RANGe:AUTO? [(@<ch_list>)]
[SENSe:]FRESistance:RANGe:AUTO <state>[,(@<ch_list>)]
[SENSe:]FRESistance:RANGe:AUTO? [(@<ch_list>)]
Description
This command disables or enables autoranging for 2-wire (RESistance) or 4-wire (FRESistance) resistance measurements on the specified channels. Autoranging is convenient because the instrument automatically selects the range for each measurement based on the input signal detected.
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 (RESistance only; not FRESistance)
Parameters
Name Type Range of Values Default Value <state> Boolean {OFF|0|ON|1} This is a required parameter. The factory default value is ON.
<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
- 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>).
- 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 .
- Autorange thresholds:
Down range at: <10% of range
Up range at: >120% of range - With autoranging enabled, the instrument selects one of the following ranges based on the input signal detected:
100Ω
1 kΩ
10 kΩ
100 kΩ
1 MΩ
10 MΩ
100 MΩ - Selecting a discrete range (see [SENSe:]RESistance:RANGe command) will disable autoranging on the specified channels.
- The CONFigure and MEASure? commands automatically enable autoranging if the first parameter is AUTO, DEF or omitted.
- The instrument enables autoranging 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 0 (OFF) or 1 (ON) for each channel specified. Multiple responses are separated by commas.
Examples
In the following examples, you can substitute the node name RES for FRES.
The following command disables autoranging on channels 03 and 13 in slot 100. For this 4-wire measurement, the instrument automatically pairs these channels in Bank 1 with the corresponding channels in Bank 2.
FRES:RANG:AUTO OFF,(@103,113)
The following query returns the autoranging settings on channels 03 and 13 in slot 100.
FRES:RANG:AUTO? (@103,113)
Typical Response: 0,0