Keithley 2601B Reference Manual page 69

Series 2600B System SourceMeter® Instrument Reference Manual
Contact check commands
The following table summarizes the basic contact check commands. For a more complete description
of these commands, refer to the
refer to Contact check connections
Basic contact check commands
Command*
flag = smuX.contact.check()
rhi, rlo = smuX.contact.r()
smuX.contact.speed = speed_opt
smuX.contact.threshold = rvalue
* smuX: For Models 2601B, 2611B, and 2635B, this value is smua (SMU Channel A); for Models 2602B, 2604B,
2612B, 2614B, 2634B, and 2636B, this value can be smua (for SMU Channel A) or smub (for SMU Channel B).
Contact check programming example
The following programming example illustrates the setup and command sequence for a typical
contact measurement. These commands set the contact check speed to fast and the threshold to
100 Ω. Then, a contact check measurement against the threshold is made. If it fails, a more accurate
contact check measurement is made, and the test is aborted. Otherwise, the output is turned on, and
the test continues.
2600BS-901-01 Rev. B / May 2013
Figure 14: Contact check measurements
TSP command reference
(on page 2-54).
Description
Determine if contact resistance is lower than threshold.
Measure the aggregate contact resistance.
Set speed_opt to one of the following:
0 or smuX.CONTACT_FAST
1 or smuX.CONTACT_MEDIUM
2 or smuX.CONTACT_SLOW
Set resistance threshold for the contact check function.
Section 2: General operation
(on page 7-1). For connection information,
2-45