3 Features and Functions
142 Keysight 34980A Mainframe User’s Guide
Resistance Measurement Configuration
This section contains information to help you configure the instrument for making
resistance measurements. Use the 2-wire method for ease of wiring and higher
density or use the 4-wire method for improved measurement accuracy. The
measurement ranges shown below.
Offset Compensation
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.
Applies only to 2-wire and 4-wire resistance measurements on the 100
Ω
, 1 k
Ω
,
and 10 k
Ω
ranges.
– Four-wire measurements are not allowed on the multiplexer modules
configured for the 1-wire (single ended) mode (see page 134).
– 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.
–The CONFigure and MEASure? commands automatically disable offset
compensation.
– 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.
Front Panel Operation:
DMM or Channel (Configure) > OFFSET COMP
Remote Interface Operation:
[SENSe:]FRESistance:OCOMpensated {OFF|ON} [,(@<ch_list>)]
[SENSe:]RESistance:OCOMpensated {OFF|ON} [,(@<ch_list>)]
If you omit the optional <ch_list> parameter, the command applies to the internal
DMM. For 4-wire measurements, specify the paired channel in Bank 1 (source) as
the <ch_list> channel (channels in Bank 2 are not allowed in the <ch_list>).
100Ω 1 kΩ 10 kΩ 100 kΩ 1 MΩ 10 MΩ 100 MΩ Autorange
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