Elgar SW 5550AE Operation Manual page 44

Operation
*
There is only one frequency setting for all three phases. Changing the frequency
of one phase changes the frequency for all phases.
**
To operate the SW as a DC supply, select the function as "DC+" or "DC-" for
positive and negative DC. "AC+DC Coupling" must also be selected from the
INSTRUMENT menu. The AMPL field is programmed to 0V as a precaution
when changing to or from the "DC+" or "DC-" function.
3.3.2.1 Locking Program Fields
For two- or three-phase systems, individual programming fields of amplitude, current
limit, phase angle, and function may be "locked" so that any change made to phase A
will be made to phases B and C. The Lock function is intended for front panel
operation. When using GPIB, use the SOURCE0 command.
To lock a field:
1. Move the field select cursor to the field to be locked in the Phase A Program
menu.
2. Press the F1 function key. The "¥" symbol should appear to the right of the field
indicating the lock mode is active.
3. Enter the value to be locked into the field.
NOTE: The lock will not be active until a value is entered; previously entered
values are not locked.
To unlock a field:
1. Move the field select cursor to the locked field in the Phase A Program menu.
2. Press the F1 function key. The "¥" symbol should disappear.
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SW 5550AE • SW 3700AE • SW 1850AE
Operation Manual