5502A
Operators Manual
6-22
LIMIT
Sequential
Overlapped
Coupled
IEEE-488
RS-232
x
x
x
x
x
(Limit command) Sets the maximum permitted output magnitude, negative and positive,
for voltage and current, which is kept in the Calibrator non-volatile memory. (While
saving configuration data in the non-volatile memory, a period of about 2 seconds, the
Calibrator does not respond to remote commands.) Negative and positive values must be
recorded. When set, the Calibrator keeps the limit settings until another limit is recorded,
or the
FORMAT
SETUP
command resets the limits (and all other defaults) to the factory
settings (±1020 V, ±20.5 A). See the
FORMAT
command.
The magnitude of the limit has this effect on different waveforms:
dc
magnitude
of
limit
ac (sine wave)
magnitude of limit (rms)
ac (non-sine wave)
magnitude of limit x 3 (peak-to-peak)
ac (with dc offset)
magnitude of limit x 2.4 (absolute peak) (volts only)
Parameters: <positive
value>,<negative value>
Example:
LIMIT 100V, -100V
Limit the voltage output to ±100 V dc, 100 V ac rms, 300 V peak-to-peak, 240 V peak.
Example:
LIMIT 1A, -1A
Limit the current output to ±1 A dc, 1 A ac rms, 3 A peak-to-peak.
LIMIT?
Sequential
Overlapped
Coupled
IEEE-488
RS-232
x
x
x
x
x
(Limit query) Shows the programmed output magnitude limits for voltage and current.
Response:
<positive value voltage>,<negative value voltage>,
<positive value current>,<negative value current>
Example:
LIMIT?
shows
1020.0000,-1020.0000, 20.5000,
−
20.5000
Shows the current value of the voltage and current limits (reset values shown).
LOCAL
Overlapped
Coupled
IEEE-488
RS-232
Sequential
x
x
x
x
x
(Local command) Puts the Calibrator into the local condition, clearing the remote
condition (see the
REMOTE
command) and front panel lockout (see the
LOCKOUT
command). This command duplicates the IEEE-488 GTL (Go To Local) message.
Parameter: (None)
Example:
LOCAL
Set the instrument into the local condition, clearing the remote condition and front panel
lockout (if enable).
LOCKOUT
Overlapped
Coupled
IEEE-488
RS-232
Sequential
x
x
x
x
x
(Lockout command) Puts the Calibrator into the lockout condition when in remote
control (see the
REMOTE
command). This means no local operation at the front panel is
permitted during remote control. To clear the lockout condition, use the
LOCAL
command. This command duplicates the IEEE-488 LLO (Local Lockout) message.
Parameter: (None)
Example:
LOCKOUT
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