Ametek Sorensen XFR 1200 Watt Series, Operation Manual

Page: 61 / 106

Standard Operation
TM-F1OP-C1XN-01 3-3
Standard Operation
This power supply has two basic operating modes: Constant Voltage
Mode and Constant Current Mode, and two control modes: Local Control
Mode (default setting) and Remote Programming Mode. Both operating
modes are available regardless of which control mode is used.
Operating Modes and Automatic Crossover
Whether controlled by local or remote programming, the power supply
has two basic operating modes: Constant Voltage Mode and Constant
Current Mode. The mode in which the power supply operates at any given
time depends on the combination of:
• output voltage setting V
SET
• output current limit setting I
SET
• resistance of the attached load R
L
See Figure 3-1 for a graphical representation of the relationships between
these variables.
Figure 3-1 Operating Modes
Output
Current
Output
Voltage
Crossover
Point
Constant
Current Mode
Region
O
V SET
I SET
O
Constant Voltage
Mode Region
Where:
R
L
= Load Resistance
V
SET
= Output Voltage Setting
I
SET
= Output Current Setting
R
L
=
V
SET
I
SET
R
L
<
V
SET
I
SET
R
L
>
V
SET
I
SET
TM-F1OP-C1XN-01.book Page 3 Thursday, October 25, 2007 9:04 PM