Keithley 2461, Справочное руководство, Страница: 147 / 1109

Section 2: General operation Model 2461 Interactive SourceMeter® Instrument Reference Manual
2-120 2461-901-01 A/November 2015
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 SCPI command reference (on page 6-1) and TSP command reference (on page 8-
1) sections.
Command Description
SCPI: :SYSTem:CCHeck? (on page 6-142)
TSP: smu.contact.check() (on page 8-102)
Indicates whether one or more connections failed the contact
check operation.
SCPI: :SYStem:CCHeck:ALL? (on page 6-
142)
TSP: smu.contact.checkall() (on page 8-103)
Returns the result of the contact check operation for high,
low, and guard connections.
SCPI: :SYSTem:CCHeck:STATe (on page 6-
143)
TSP: smu.contact.enable (on page 8-104)
Enables or disable the contact check function.
SCPI: :SYSTem:CCHeck:THReshold (on page
6-144)
TSP: smu.contact.threshold (on page 8-105)
Sets the resistance level at which the contact check operation
indicates a failure.
Contact check programming example
SCPI command programming example
Command Description
*RST
•
Reset the Model 2461 to default settings.
:SYST:CCH:STAT ON
•
Enable the contact check function.
:SYST:CCH:THR OHM15
•
Set the contact threshold resistance level to 15 Ω .
:SYST:CCH?
•
Run the contact check test to determine if there are any
contact check failures.
:SYST:CCH:ALL?
•
Run the contact check test again to get the status of the test
for the high, low, and guard connections.
:SYST:RSEN ON
•
After running contact check, enable 4-wire remote sense.
:SYST:CCH:STAT OFF
•
Disable the contact check function.