Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 7: Command reference
2651A-901-01 Rev. A / March 2011 7-187
smuX.contact.r()
This function measures contact resistance.
Type TSP-Link accessible
Affected by Where saved Default value
Function Yes
Usage
rhi, rlo = smuX.contact.r()
rhi
The measured contact resistance on the high/sense high side
rlo
The measured contact resistance on the low/sense low side
X
Source-measure unit (SMU) channel (for example, smua.contact.r() applies to
SMU channel A)
Details
Attempting to perform a contact resistance measurement when any of the following conditions exist will generate
an error:
When output is on and any of the following:
• SMU is a current source with current range set to less than 1 mA (error number 5065)
• SMU is a voltage source with current limit set to less than 1 mA (error number 5050)
When output is off and any of the following:
• The output off mode is High-Z (error number 5048)
• 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 number 5066)
• 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 number 5065)
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
smuX.contact.check() (on page 7-186)
smuX.contact.speed
(on page 7-188)
Contact check connections
(on page 2-45)
Contact check measurements
(on page 2-37)

Keithley 2651A Specifications

General

Brand	Keithley
Model	2651A
Category	Measuring Instruments
Language	English