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Series 2600B System SourceMeter® Instrument Reference Manual
Section 7: TSP command reference
2600BS-901-01 Rev. C / August 2016
7-209
Also see
(on page B-18)
(on page 7-203)
(on page 7-204)
(on page 7-206)
smuX.contact.check()
This function determines if contact resistance is lower than the threshold. This function is not available on the
Models 2604B/2614B/2634B.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function
Yes
Usage
smu
X
.contact.check()
X
Source-measure unit (SMU) channel (for example,
smua.contact.check()
applies to SMU channel A)
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
smu
X
.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
smu
X
.source.offfunc
attribute set to
smu
X
.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
smu
X
.source.offfunc
attribute set to
smu
X
.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
Takes action if contact check on SMU channel A fails.