B-14
BIT 4886 051010
FIGURE B-4. PROGRAMMING THE OUTPUT
B.50 [SOURce:]CURRent:MODE COMMAND
CURR:MODE
Syntax:
Short Form: [SOUR:]CURR:MODE (FIX | LIST | TRAN) nn
Long Form: [SOURce:]CURRent:MODE (FIXed | LIST | TRANsient) nn
nn = <value> = time in seconds for transient
Description:
Allows the user to execute or stop a list, or to execute a transient.
The default mode is FIXed: the
power supply executes commands normally, and LIST commands can be issued to establish the
parameters and sequence of a list.
When CURR:MODE LIST is issued, a list is executed (See LIST commands and Figure B-3). While
the list is being executed, LIST commands are not accepted and will produce a command error. Issu-
ing CURR:MODE FIX while the list is running will stop the execution of the list and return power supply
to settings in effect prior to running the list. If the list runs to completion, the settings of the last step of
the list will be in effect.
CURR:MODE TRANs nn causes the next CURR: command to produce a transient pulse of nn sec-
onds duration, after which the current reverts back to the previous setting (Similar to
VOLT:MODE TRANs (see PAR. B.59 for examples). If the time nn exceeds 10 seconds, error mes-
sage -222 “data out range” is posted to the error queue.
Related Commands:
LIST commands. (See
example, Figures B-2 and B-3.)
NOTES: 1. The power supply is assumed to be operating in Voltage mode.
2 Examples below are intended only to illustrate command functions. Refer to PAR. 4.1.1 for pro-
gramming techniques to optimize performance.
OUTP ON
Turns the output on.
VOLT 21; CURR 1.5
Since power supply is in voltage mode, output is programmed to go to 21V,
current limit 1.5A.
INIT:CONT ON
Continuous triggers enabled.
INIT:CONT?
Power supply returns “1.”
VOLT:TRIG 15;CURR:TRIG 3
Power supply output programmed to return to 15V, current limit
3A upon receipt of trigger.
*TRG
Power supply output returns to 15V,current limit 3A.
VOLT 21; CURR 5E-2
Power supply output programmed to go to 21V, current limit 0.05A.
MEAS:VOLT?
If actual value of output voltage is 20.9V, power supply
returns 2.09E1.
MEAS:CURR?
If actual value of output current is 0.0483A, power supply
returns 4.83E-2.
FUNC:MODE CURR
Establishes Current mode as power supply operating mode.
VOLT 21; CURR 1.1
Power supply programmed to voltage limit 21V, 1.1A.
CURR?
Returns 1.1.
FUNC:MODE VOLT
Establishes Voltage mode as power supply operating mode.
CURR:TRIG?
Returns 3 (current value established by CURR:TRIG).
VOLT:TRIG?
Returns 15 (voltage value established by VOLT:TRIG).
TRIG
Power supply output returns to 15V, current limit 3A.
INIT:CONT 0
Triggers disabled.
INIT:CONT?
Power supply returns “0.”
VOLT 0
Power supply output programmed to go to 0V.
MEAS:VOLT?
Returns 0. (measured output voltage).
VOLT?
Returns 0.(programmed output voltage).
CURR?
Returns 1.5 (programmed current).
MEAS:CURR?
Returns 0. (measured output current).
CURR:RANG 4
Set the current range to 1/4 of full scale. The maximum current for a 100-1
BOP is now 0.25ampere.
CURR .3
Selecting a range greater than 0.25 results in no change of output current.
CURR .2
Sets power supply to deliver 0.2 ampere at 0.024% accuracy.
CURR AUTO
The power supply remains in 1/4 scale.
CURR .5
Sets the output to be 1/2 ampere in the high range.
CURR:RANG?
Unit returns a 1 indicating unit range.is full scale.
