[SENSe:]FRESistance:RANGe
Syntax
[SENSe:]FRESistance:RANGe {<range>|MIN|MAX|DEF} [, (@<ch_list>)]
[SENSe:]FRESistance:RANGe? [{(@<ch_list>)|MIN|MAX}]
Description
This command selects the measurement range for 4-wire resistance 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
34925A FET Multiplexer (differential mode only)
Parameters
|
Name |
Type |
Range of Values |
Default Value |
|
<range> |
Discrete |
Desired range in ohms: 100Ω (MIN) |
This is a required parameter |
|
<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.
Selecting a discrete range will disable autoranging on the specified channels (see [SENSe:]FRESistance:RANGe:AUTO command).
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:]RESistance:RANGe command).
The CONFigure and MEASure? commands automatically enable autoranging.
If the input signal is greater than can be measured on the selected range (manual ranging), the instrument gives an overload indication: "±OVLD" from the front panel or "±9.9E+37" from the remote interface.
For 4-wire resistance measurements, the instrument automatically pairs channel n in Bank 1 with channel n+20 in Bank 2 (34921A, 34923A, 34925A) 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 measurements are not allowed on the multiplexer modules configured for the single-ended mode (see SYSTem:MODule:WIRE:MODE command).
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 command returns the range in the form "+1.00000000E+03" for each channel specified. Multiple responses are separated by commas.
Examples
The following command selects the 10 kΩ range 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.
FRES:RANG 10E+3,(@1003,1013)
The following query returns the range selected on channels 3 and 13 in slot 1.
FRES:RANG? (@1003,1013)
Typical Response: +1.00000000E+04,+1.00000000E+04