Keithley 2461 Reference Manual

Model 2461
Interactive SourceMeter® Instrument Reference Manual Section 6:
SCPI command reference
2461-901-01 A/November 2015 6-27
Details
When auto clear is set to on for a measure function, limit conditions are cleared automatically after
each measurement. If you are making a series of measurements, the instrument shows the limit test
result of the last measurement for the pass or fail indication for the limit.
If you want to know if any of a series of measurements failed the limit, set the auto clear setting to off.
When this set to off, a failed indication is not cleared automatically. It remains set until it is cleared
with the clear command.
The auto clear setting affects both the high and low limits.
If you send this command without the <function> parameter, it will set autoclear for all measure
functions. It will not change the setting for a digitize function.
Example
:CALC2:VOLT:LIM1:CLE:AUTO ON
:CALC2:VOLT:LIM1:AUD FAIL
:CALC2:VOLT:LIM1:LOW 0.25
:CALC2:VOLT:LIM1:UPP 2.5
:CALC2:VOLT:LIMIT1:STAT ON
:READ?
:CALC2:VOLT:LIMIT1:FAIL?
Set limit autoclear on.
Enable the beeper for limit 1 when a voltage
measurement exceeds the limit.
Set lower limit 1 for voltage to 0.25 V.
Set upper limit 1 for voltage to 2.5 V.
Enable limit 1 testing for voltage.
Make a reading; the limit is checked and results
display on the front panel
Return the test results; example output if the test
fails on the low limit:
LOW
The test results are automatically cleared.
Also see
:CALCulate2:<function>:LIMit<Y>:CLEar[:IMMediate] (on page 6-28)

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV