Keithley 2606B System SourceMeter, Reference Manual, Page: 473 / 756

2606B System SourceMeter® Instrument Reference Manual Section 7: TSP command reference
2606B-901-01 Rev. B / May 2018 7-189
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
smua.contact.speed = smua.CONTACT_SLOW
rhi, rlo = smua.contact.r()
print(rhi, rlo)
exit()
end
Check contacts against threshold.
Set speed for SMU channel A to slow.
Get resistance readings.
Output contact resistances to the host.
Terminate execution.
Also see
Contact check connections (on page 2-51)
Contact check measurements (on page 2-50)
smuX.contact.check() (on page 7-187)
smuX.contact.speed (on page 7-189)
smuX.contact.speed
This attribute stores the speed setting for contact check measurements.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Instrument reset
SMU reset
Recall setup Not saved 0 (smuX.CONTACT_FAST)
Usage
speedSetting = smu X .contact.speed
smu X .contact.speed = speedSetting
speedSetting The speed setting. Set to one of the following:

0
or
smu X .CONTACT_FAST

1
or
smu X .CONTACT_MEDIUM

2
or
smu X .CONTACT_SLOW
X Source-measure unit (SMU) channel (for example,
smua.contact.speed
applies
to SMU channel A)
Details
This setting controls the aperture of measurements made for contact check. It does not affect the
smu X .measure.nplc
aperture setting.
The speed setting can have a dramatic effect on the accuracy of the measurement (see
specifications).