Chapter 3 Front-Panel Operation
Constant Voltage Operation
24
Constant Voltage Operation
To set up the power supply for constant voltage (CV) operation, proceed as
follows.
• Front-panel operation:
1 Connect a load to the output terminals.
With power-off, connect a load to the (+) and (-) output terminals.
2 Turn on the power supply.
The power supply will go into the
power- on / reset
state; the output is disabled
(the
OFF
annunciator turns on); the 8V/20A* or 25V/7A** range is select ed (the
8V
* or
25V
** annunciator turns on); and the knob is selected for
voltage
control.
Press * or ** key to operate the power supply in the 20V/10A* or
50V/4A** range before proceeding to the next step. T he
20V
* or
50V
**
annunciator turns on.
3 Set the display to the limit mode.
No t i c e that the
Limit
annunciator blinks, indicating that the display is in the
li mit mod e. Wh en t he dis pla y i s in t he
lim it
mode, you can see the volt age and
current limit values of the power supply.
4 Adjust the knob for the desired curren t limit.
Check that the
Limit
annunciator still blinks. Set the knob for
current
control.
The second digit of the ammeter will be blinking. The blinking digit can be
changed using the resolution selection keys and the blinking digit can be
adjusted by turning the knob. Adjust the knob to the desired current limit.
1
You can use the resolution selection keys to move the blinking digit to the
right or left when settin g curr en t.
In
constant voltage
m ode, the voltage va lu es betwee n the m ete r and
limit modes are the same, but the current values are not. Moreover, if t he
display is in the m eter m ode, you cannot see the change of current limit
value when adjusting the knob. We recommend that you should set the
displ ay to “lim it” m ode to see the chan ge of curr en t lim it valu e in the
constant voltage mode whenever adjusting the knob.
Power
20V,10A 50V,4A
Display
Limit
Voltage
Current
1
*For HP E3633A Model **For HP E3634A Model
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