Smux.contact.r() - Keithley 2601B Reference Manual

Section 7: TSP command reference
Details
This function returns true if the contact resistance is below the threshold; this function returns false if it is
above the threshold. The threshold value is set by the smuX.contact.threshold attribute.
If you attempt to perform a contact check measurement when any of the following conditions exist, an error is
generated.
When the output is on and any of the following:
•
SMU is a current source with current range set to less than 1 mA (error code 5065, "I range too low for
contact check")
•
SMU is a voltage source with current limit set to less than 1 mA (error code 5050, "I limit too low for
contact check")
When the output is off and any of the following:
•
The output off mode is High-Z (error code 5048, "Contact check not valid with HIGH-Z OUTPUT off")
•
The output off mode is Normal with the smuX.source.offfunc attribute set to
smuX.OUTPUT_DCVOLTS and the off current limit set to less than 1 mA (error code 5066,
"source.offlimiti too low for contact check")
•
The output off mode is Normal with the smuX.source.offfunc attribute set to
smuX.OUTPUT_DCAMPS and the source range is less than 1 mA (error code 5065, "I range too low for
contact check")
Example
if not smua.contact.check() then
-- take action
end
Also see
Contact check connections
Contact check measurements
smuX.contact.speed
smuX.contact.threshold
smuX.source.offfunc

smuX.contact.r()

This function measures aggregate contact resistance. This function is not available on the Models
2604B/2614B/2634B.
Type TSP-Link accessible
Function Yes
Usage
rhi, rlo = smuX.contact.r()
rhi
rlo
X
7-194
Series 2600B System SourceMeter® Instrument Reference Manual
(on page 2-54)
(on page 2-44)
(on page 7-195)
(on page 7-196)
(on page 7-225)
Affected by
The measured aggregate contact resistance on the HI/sense HI side
The measured aggregate contact resistance on the LO/sense LO side
Source-measure unit (SMU) channel (for example, smua.contact.r() applies to
SMU channel A)
Takes action if contact check on SMU channel A fails.
Where saved Default value
2600BS-901-01 Rev. B / May 2013