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 selected (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. The 20V* or 50V** annunciator turns
on.
3 Set the display to the limit mode.
Notice that the Limit annunciator blinks, indicating that the display is in the limit
mode. When the display is in the limit mode, you can see the voltage and current limit
values of the power supply.
4 Adjust the knob for the desired current 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 setting current.
5 Adjust the knob for the desired output voltage.
In constant voltage mode, the voltage values between the meter and limit modes
are the same, but the current values are not. Moreover, if the display is in the
meter mode, you cannot see the change of current limit value when adjusting the
knob. We recommend that you should set the display to “limit” mode to see the
change of current limit value in the constant voltage mode whenever adjusting the
knob.
*For HP E3633A Model **For HP E3634A Model
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