AMETEK SGI Series - Manual (Page 86)

Calibration and Verification Sorensen SGI Series
3-34 M550221-01 Rev AA
3.8.5 Constant-Power Mode
The Constant-Power Mode allows the supply to regulate the output to a
constant power setting as opposed to the more common constant voltage or
constant current modes of operation (see Section 3.2). (
Note:
This mode is
intended primarily for loads with response times greater than approximately
10 ms). While in this mode, the supply will continually adjust the voltage and
current levels to attempt to maintain a constant power to the load. In order to
provide additional protection for the load, voltage, and current limits may be set
while in the Constant-Power mode. If the unit cannot regulate to the Constant
Power setting due to load conditions, it will regulate either at the voltage or
current limit depending on the load demand. See Figure 3-12.
Figure 3-12. Constant-Power Example
To access the Constant Power Setup menu, press the F4
key from Home Menu Page 1. Navigate to each editable
item and enter the appropriate values. Press F3 to
execute (the display jumps to Constant Power screen) or
F4 to abort (the display returns to Home Menu Page 1).
From Constant Power screen, the user may either edit the
limits again or exit Power mode. F3 jumps to Constant
Power Edit screen, and after inputting new values, press
F3 to make those changes effective and jump back to
Constant Power Screen, or press F4 to ignore the
changes and jump to Constant Power Exit.
From Constant Power Exit, F1 cancels the command to exit
and jumps back to Constant Power screen, or F4 exits
Constant Power and jumps to Home Menu Page 1 with the
Voltage, Current, and OVP values as set. (See Menu Map,
Section 3.7.8).
Constant Power Mode
Current
V
o
lt
a
g
e
V limit
I l
im
it
Constant Power setting