Keithley 2450

Appendix
B: Common commands Model 2450 Interactive SourceMeter® Instrument
Reference Manual
B-6 2450-901-01 Rev. B/September 2013
You cannot combine the command sets.
Example
*LANG TSP
*LANG?
Set the language to TSP.
Verify setting by sending the language query.
Output:
TSP
The TSP command set is in use.
Also see
Status model (on page C-1)
*OPC
This command sets the operation complete (OPC) bit after all pending commands, including overlapped
commands, have been executed.
Type Affected by Where saved Default value
Command and query
Usage
*OPC
*OPC?
Details
When *OPC is sent, the OPC bit (bit 0) in the Status Event Status Register is set after all pending command
operations have been executed.
When *OPC? is sent, an ASCII “1” is placed in the output queue after all pending command operations have
been executed.
Typically, either one of these commands is sent after the INITiate command. The INITiate command takes
the instrument out of idle in order to perform measurements.
When the trigger model is executing, most sent commands are not executed. If a command cannot be
processed, an error message is generated in the event log.
After all programmed operations are complete, the instrument returns to idle, at which time all pending
commands (including *OPC and *OPC?) are executed. After the last pending command is executed, the OPC bit
or an ASCII “1” is placed in the Output Queue.
Also see
:INITiate[:IMMediate] (on page 6-124)
opc() (on page 8-77)