5502A
Operators Manual
6-24
you want to return to the reference value, use the OLDREF command. If editing the
output and you want to make the edited value the new reference, use the NEWREF
command.
Parameter: (None)
Example: OLDREF
Set the output to the reference value that exists, clearing editing changes.
ONTIME?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Calibrator On Time query) Shows the time in minutes since the Calibrator was most
recently powered up.
Response: <minutes> (24-hour clock)
Example: ONTIME? shows 47
Shows the time since the Calibrator was last powered up: 47 minutes.
*OPC
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Operations Complete command) Sets bit 0 (OPC) of the Event Status Register to 1
when all pending device operations are complete. Also see the *ESR? command.
Parameter: (None)
Example: *OPC
Set bit 0 of the Event Status Register to 1 when all pending device operations are done.
*OPC?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Operations Complete query) Shows a 1 after all pending operations are complete. This
command causes program execution to pause until operations are complete. (See *WAI.)
Response: 1 (all operations are complete)
Example: *OPC? shows 1
Shows 1 when all pending operations are complete.
OPER
Overlapped CoupledIEEE-488 RS-232 Sequential
xx xxx
(Operate command) Activates the Calibrator output if it is in standby. This is the same as
pressing the Calibrator front panel key. If there are errors in the error queue, the
OPER command is inhibited for outputs 33 V and over. (Also see the ERR? command
and STBY command.)
Parameter: (None)
Example: OPER
Connect the selected output to the Calibrator front panel terminals. Also lights the
annunciator in the key.
OPER?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Operate query) Shows the operate/standby setting.
Response: 1 (Operate)
0 (Standby)
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