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Chapter 3 Front-Panel Operation
Constant Voltage Operation
36
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.
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.
Power
20V,10A 50V,4A
Display
Limit
Voltage
Current
1
*For Agilent E3633A Model **For Agilent E3634A Model