Agilent Technologies E3646A, User Manual, Page: 42 / 211

Chapter 3 Front-Panel Operation and Features
Constant Voltage Operation
42
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); its low voltage range is selected (annunciator for the range
presently selected turns on, for example, the
8V
annunciator turns on for the E3646A
model); and the knob is selected for voltage control. At power-on, the output1 is
selected and the
OUT1
annunciator turns on.
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 power supply.
4 Adjust the knob for the desired current limit.
Check that the
Limit
annunciator still flashes. Set the knob for current control. The
flashing digit can be changed using the resolution selection keys and the flashing 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 flashing 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
High
Display
Limit
Current
Voltage
1
Current
Voltage
1