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Chapter 3 Front-Panel Operation
Front-Panel Operation Overview
35
3
Front-Panel Operation Overview
The following section describes an overview of the front-panel keys before
operating your power supply.
• The power supply is shipped from the factory configured in the front-panel
operation mode. At power-on, the power supply is automatically set to
operate in the front-panel operation mode. When in this mode, the front-
panel keys can be used. When the power supply is in remote operation mode,
you can return to front-panel operation mode at any time by pressing the
key if you did not previously send the front-panel lockout command.
A change between front-panel and remote operation modes will not result
in a change in the output parameters.
• The power supply has two output ranges of 15V/7A or 30V/4A. This feature
allows more voltage at a lower current or more current at a lower voltage.
The desired output range is selected from the front panel or over the remote
interfaces. The
15V or 30V annunciator indicates the presently selected
range.
• When you press key (the
Limit annunciator blinks), the
display of the power supply goes to the limit mode and the present limit
values will be displayed. In this mode, you can also observe the change of
the limit values when adjusting the knob. If you press the
key again or let the display time-out after several seconds, the power supply
will return the display to the meter mode (the
Limit annunciator turns off).
In this mode, the actual output voltage and current will be displayed.
• The output of the power supply can be enabled or disabled from the front
panel using the key. When the output is off, the
OFF
annunciator turns on and the output is disabled.
• The display provides the present operating status of the power supply with
annunciators and also informs the user of error codes. For example, the
power supply is operating in CV mode in the 15V/7A range and controlled
from the front panel, then the
CV and 15V annunciators will turn on. If,
however, the power supply is remotely controlled, the
Rmt annunciator will
also turn on, and when the power supply is being addressed over GPIB
interface, the
Adrs annunciator will turn on. See "Display Annunciators"
on page 5 for more information.
Local
Display Limit
Display Limit
Output On/Off