Chapter 3 Front-Panel Operation
Constant Current Operation
26
Constant Current Operation
To set up the power supply for constant current (CC) 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.
To operate the power supply in the 20V/10A* or 50V/4A** range, press * or
** key 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 selected supply.
4 Adjust the knob for the desired voltage limit.
Check that the Limit annunciator still blinks and the second digit of voltmeter blinks
to indicate the knob is selected for voltage control. The blinking digit can be changed
using the resolution keys and the blinking digit can be adjusted by turning the knob.
Adjust the knob for the desired voltage limit.
1
You can use the resolution selection keys to move the blinking digit to the right or
left when setting the voltage.
In constant current mode, the current values between the meter mode and limit
mode are the same, but the voltage values are not. Moreover, if the display is in
the meter mode, you cannot see the change of voltage limit value when adjusting
the knob. We recommend that you should set the display to “limit” mode to see
the change of voltage limit value in the constant current mode whenever adjusting
the knob.
*For HP E3633A Model **For HP E3634A Model
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