Chapter 3 Front-Panel Operation and Features
Constant Current Operation
44
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); its low voltage range is selected (annunciator
for the range presently selected turns on, for example, the
8V annunciator turns
on for the E3640A model); and the knob is selected for voltage control.
Press to operate the power supply in the high voltage range before
proceeding to the next step. The
20V or 60V annunciator turns on depending
on which power supply you are using.
3 Set the display to the limit mode.
Notice that the
Limit annunciator flashes, 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 flashes and the knob is selected for
voltage control. The flashing digit can be changed using the resolution keys
and the flashing 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 flashing 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
High
Display
Limit
1
