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7
Power Supply Settings
The procedures for setting voltage and current, either numerically or via the spin wheel, have
been explained in the previous section.
7.1 CV and CC modes, Viewing Settings (Limits)
Depending upon the load conditions, the actual voltage and actual current applying to the load
will not both be equal to their set values.
Output On – CV Mode
When in constant voltage mode the output voltage is equal to the set value and CV is shown on
the top line of the display. The current setting represents the limiting value of current that could
flow (the current limit).
Output On – CC Mode
When in constant current mode the output current is equal to the set value and CC is shown on
the top line of the display. The voltage setting represents the limiting value of voltage that could
be applied (the voltage limit).
Switch-over between CV and CC modes occurs automatically dependent upon the load
conditions and the settings. The voltage and current settings may also be described as limits
since they represent the maximum values that can apply at the load.
To draw attention to the CC symbol and make it clear at a glance, a flashing arrow is
placed next to it. It is also possible to set an audible alert – see section 10.2.
Output Off
When an output is off, the meters show these set values and SET is shown on the top line of
the display. When an output is on, the values of voltage generated and current flowing are
shown together with CV or CC.
View Settings/ View Limits
It is also possible to view the set values for all three outputs at any time. Pressing the OK key
(also marked View Limits or View Settings) causes the display to change so that the meters all
show the limits values for a period of about 2 seconds.
7.2 Setting with Individual Output Screens
The three illuminated keys marked
O/P 1, O/P 2 and O/P 3 select a
screen that controls only the chosen
output. This screen provides more
information than the main (Home)
screen (see section 6.1), and allows
additional parameters to be set.
The top line shows the operating
mode (CV, CC or SET) together with
the voltage tracking status. The
meters are displayed in a larger font, and the complete settings status for the output is shown
below them.
The six soft keys are used to set voltage and current (Vset and Iset), over-voltage and over-
current protection levels (OVP & OCP), current meter averaging (Iavg), range selection (Range)
and store or recall of settings (Stores).
Setting voltage or current is as previously described for the Home screen – see section 6.1.
