Contact Check Connections - Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Front-panel sense mode selection
To check or change the sense mode from the front panel:
1. Press the CONFIG key.
2. Press the SRC or MEAS key.*
3. If you pressed the SRC key:
• Select V-SOURCE > SENSE-MODE.
If you pressed the MEAS key:
•
Select V-MEAS > SENSE-MODE.
4. Select 2-WIRE or 4-WIRE as desired.
* The Model 2651A sense mode can be accessed and set from either the V-SOURCE or the V-MEAS
menu items.
Remote programming sense selection
The following table summarizes the commands to select the sense mode. See Programming
commands for details on using these commands.
Commands to select sense mode
Command
smua.source.output = smua.OUTPUT_OFF
smua.sense = smua.SENSE_LOCAL
smua.sense = smua.SENSE_REMOTE

Contact check connections

The contact check function prevents measurement errors due to excessive resistance in the force or
sense leads. The figure below shows connections for contact check measurements. See
check measurements
contact check commands.
2651A-901-01 Rev. A / March 2011
(on page 2-37) for operation and Programming commands for details on
Section 2: General operation
Description
Turns off the source-measure unit
(SMU) output.
Selects local (2-wire) sense.
Selects remote (4-wire) sense.
Contact
2-45