Keithley 2182, User Manual, Page: 254 / 339

15-16 Additional SCPI Commands
:CLEar
:STATus:QUEue:CLEar Clears all messages from Error Queue
Description
This command is used to clear the Error Queue of all messages.
:SYSTem subsystem
The SYSTem subsystem commands are summarized in Table 14-9 .
:PRESet command
:PRESet
:SYSTem:PRESet Return to :SYSTem:PRESet defaults
Description
This command returns the instrument to states optimized for front panel operation.
:SYSTem:PRESet defaults are listed in the SCPI tables ( Table 14-1 through Table 14-12 ).
Performance commands
:FAZero[:STATe] <b>
:SYSTem:FAZero[:STATe] <b> Control Front Autozero
Parameters
<b>= 0 or OFF Disable Front Autozero
1 or ON Enable Front Autozero
Description
With Front Autozero enabled (which is the default setting), the instrument performs two A/D
measurement cycles for each reading. The first one is a normal measurement cycle. The second
measurement cycle is performed with the polarity of the front-end amplifier reversed. This
current-reversal measurement technique is used to cancel internal offsets in the amplifier. With
Front Autozero disabled, the second measurement cycle is not performed.
The speed for Delta measurements can be doubled by disabling Front Autozero. Delta uses
its own current-reversal technique to cancel offsets. Therefore, the dual measurement technique
of Front Autozero is not required.
See “ Autozeroing modes ” in Section 2 for more information (including benefits and
drawbacks) on Front Autozero.