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Chapter 3 Front-Panel Operation
Constant Current Operation
38
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.
Power
20V,10A
50V,4A
Display
Limit
1
*For Agilent E3633A Model **For Agilent E3634A Model