Series 2600 System SourceMeters Reference Manual Instrument Control Library 12-67
Return to Section 12 topics 2600S-901-01 Rev. A / May 2006
Example
Takes action if contact check on SMU A fails:
if (not smua.contact.check()) then
-- take action
End
smuX.contact.r
X = SMU channel (a or b)
Function Measure contact resistance.
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
Remarks Attempting to perform a contact check measurement when any of the following
conditions exists will generate an error:
• SMU is configured as a current source with the output on.
• Output is off in High-Z mode.
• Current limit set to less than 1mA.
Details See Section 3 for connections.
Also see smuX.contact.speed
smuX.contact.speed
X = SMU channel (a or b)
Function The speed setting for contact check measurements.
Usage speed_opt = smuX.contact.speed
smuX.contact.speed = speed_opt
Set speed_opt to one of the following:
0 or smuX.CONTACT_FAST
1 or smuX.CONTACT_MEDIUM
2 or smuX.CONTACT_SLOW
Remarks This setting controls the aperture of measurements made for contact check. It does not
affect the smuX.measure.nplc aperture setting.
The speed setting can have a dramatic effect on the accuracy of the measurement, as
reflected in the specifications.
Details See Section 3 for connections.
Example
Set contact check measurements on SMU A for higher accuracy:
smua.contact.speed = smua.CONTACT_SLOW
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