EPS Stromversorgung PS 5040-10 A, Operating Manual, Page: 28 / 36

Page 28
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PS 5000 A Series
3.4 Manual operation
3.4.1 Switching the device on
The device should, as far as possible, always be switched on using the toggle switch on the front of the device.
Alternatively this can take place using an external cutout (contactor, circuit breaker) of suitable current capacity.
After switching on and a certain start-up time, the device will be ready for use. It also restores the last condition of
the DC output like it was when switching the device off the last time, so either on or off. All set values are always
saved and restored.
3.4.2 Switching the device off
On switch-off the last output condition and the most recent set values are saved. The DC output is immediately
switched off and a power fail error PF (only 640 W models) will be indicated, but can be ignored here, and after a
short while the device will be completely powered off.
3.4.3 Manual adjustment of set values
Adjusting the set values of voltage, current and power is the fundamental
operating possibility of a power supply and hence the two rotary knobs on
the front of the device are usually assigned to voltage (left-hand knob) and
current (right-hand knob).
The manual adjustment of the set values can only be done while the device is
not in a different mode, like adjustment mode for OVP/OCP values. See figure
to the right. In normal operation mode, the middle row shows the set values.
The power set value is not directly adjustable from here.
The control panel lock (see
3.4.7 ) can block the user from adjusting set values.
► How to adjust voltage and current manually
1.
In normal operation (see example screenshot above), rotate the left-hand knob to adjust voltage and the
right -hand knob to adjust current, no matter if the DC output is switched on or off.
2.
While adjusting values, you can push any of the knobs to switch between fine and coarse adjustment of
values. See below.
► How to switch between fine and coarse value adjustment
1.
Coarse adjustment mode is default after the unit has been powered. It
will increment or decrement a value by 1. You can switch to fine adjust -
ment mode anytime by shortly pushing any of the rotary knobs. This
mode is indicated in the displays as shown in the example screenshot
to the right.
► How to adjust power manually
1.
In normal operation (see example screenshot above), push both rotary
knobs
simultaneously
.
2.
The display should switch to setup mode, in this case for power value
adjustment. See example screenshot to the right.
3.
Adjust the indicated power value (unit W) with the left-hand rotary knob, like when adjusting voltage. Switch-
ing between fine and coarse adjustment as described above. In case the DC output is switched on, the
adjusted values immediately becomes effective.
4.
Leave the power adjustment mode by pushing both rotary buttons again and simultaneously.
Adjusting set value always submits the value to the power stage immediately, no matter if the
DC output is switched on or off.
The set values of voltage and current are part of the recall sets (see 3.4.6), the power set value
is not.