Ametek sorensen hpd series, Operation Manual

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Section 4. Operation
Introduction
Once you have installed the power supply and have connected both the AC input
power and the load as covered in
Section 2, “Installation” , the power supply is ready
to operate.
• “Operating Modes” , below, offers a brief explanation of Constant Voltage and
Constant Current Mode operation.
• “Connecting Multiple Supplies in Series (Voltage Mode Only)” on page 36 ,
covers using multiple supplies.
Operating Modes
Your 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 or impedance of the attached load R
L
Figure 4.1 represents the relationships between these variables.
Output
Voltage
Constant Voltage
Mode Region
R
L
>
V
SET
I
SET
V SET
O
O
Crossover Point
Constant Current
Mode Region
Output
Current
I SET
R
L
=
V
SET
I
SET
R
L
<
V
SET
I
SET
Where:
R
L
= Load Resistance
V
SET
= Output Voltage Setting
I
SET
= Output Current Setting
Figure 4.1 Relationship Between Operating Mode Variables
Note
The control circuits have been designed to allow you to set output voltage and current
up to 5% over the model-rated maximum values. The power supply will operate within
these extended ranges, but we cannot guarantee full performance to specification.
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