AMETEK HPD Series Operation Manual - Manual (Page 33)

33
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.
21