Contact Check Commands; Contact Check Programming Example - Keithley 2461 Reference Manual

Section 2: General operation
Check the high, low, and guard connections for failures
To check whether high, low, and guard connections to the DUT exceed the threshold resistance level,
send one of the following commands. A result for each connection is returned.
Using SCPI:
:SYStem:CCHeck:ALL?
This command returns 0 if a connection fails the contact check test, or a 1 if it passes. For example, if
the high connection fails, but the low and guard connections pass, the output will be 0,1,1.
Using TSP:
print(smu.contact.checkall())
The print command returns false if a connection fails the contact check test, or true if it passes.
For example, if the high connection fails, but the low and guard connections pass, the output will be
false,true,true.

Contact check commands

The following table summarizes the Model 2461 contact check commands, which are described in
more detail in the
1) sections.
Command
SCPI: :SYSTem:CCHeck?
TSP: smu.contact.check()
SCPI: :SYStem:CCHeck:ALL?
142)
TSP: smu.contact.checkall()
SCPI: :SYSTem:CCHeck:STATe
143)
TSP: smu.contact.enable
SCPI: :SYSTem:CCHeck:THReshold
6-144)
TSP: smu.contact.threshold

Contact check programming example

SCPI command programming example
Command
*RST
:SYST:CCH:STAT ON
:SYST:CCH:THR OHM15
:SYST:CCH?
:SYST:CCH:ALL?
:SYST:RSEN ON
:SYST:CCH:STAT OFF
2-120
Model 2461 Interactive SourceMeter® Instrument Reference Manual
SCPI command reference
(on page 6-142)
(on page 8-102)
(on page 6-
(on page 8-103)
(on page 6-
(on page 8-104)
(on page
(on page 8-105)
Description
Reset the Model 2461 to default settings.
•
Enable the contact check function.
•
Set the contact threshold resistance level to 15 Ω.
•
Run the contact check test to determine if there are any
•
contact check failures.
Run the contact check test again to get the status of the test
•
for the high, low, and guard connections.
After running contact check, enable 4-wire remote sense.
•
Disable the contact check function.
•
(on page 6-1) and TSP command reference
Description
Indicates whether one or more connections failed the contact
check operation.
Returns the result of the contact check operation for high,
low, and guard connections.
Enables or disable the contact check function.
Sets the resistance level at which the contact check operation
indicates a failure.
(on page 8-
2461-901-01 A/November 2015