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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PSB 9000 3U Series
3.5.6
Manual adjustment of set values
The set values for voltage, current and power are the fundamental operating possibilities of a power supply and
hence the two rotary knobs on the front of the device are always assigned to two of the values in manual operation.
For each, sink and source mode, the device has separately adjustable set values for current and power which are
labelled accordingly in the display.
As a fourth value there is the internal resistance, for which the resistance mode (R mode) has to be activated in
the MENU first. Refer to
„3.5.3. Configuration via MENU“
as well as
„3.3.4. Internal resistance regulation (source
„3.3.5. Resistance regulation / constant resistance (sink mode)“
for details.
Set values can be entered manually in two ways, via
rotary knob
or
direct input
.
Entering a value changes it immediately and no matter if the DC power stage is switched on or off.
When adjusting set values, upper and lower limits may come into effect. See section
Adjustment limits“. Once a limit is reached, the display will show a small note like “Limit: U-max”
etc. for 1.5 seconds next to the adjusted value.
►
How to adjust set values U, I, P or R with the rotary knobs
1.
First check if the value you want to change is already assigned to one of the rotary
knobs. The main screen displays the assignment as depicted in the figure to the right.
2.
If, as shown in the example, the assignment is voltage (U, left) and power (P, right),
and it is required to set the current, then the assignments can be changed by tapping
the depiction of the right-hand knob until it shows “I”. In the left-hand display area
one of the set values of current, for sink or source mode, is indicated as selected
by its physical unit being display inverted.
3.
After successful selection, the desired value can be set within the defined limits.
Selecting a digit is done by
pushing the rotary knob which shifts the cursor from right to left (selected digit will be underlined):
►How to adjust values via direct input:
1.
In the main screen, depending on the rotary knob assignment, values
can be set for voltage (U), current (I), power (P) or resistance (R) via
direct input by tapping on one of the small ten-key pad symbols, for
example the one in the blue area if you wanted to adjust the voltage.
2.
Enter the required value using the ten-key pad. Similar to a pocket
calculator the key
clears the input.
Decimal values are set by tapping the point key. For example, 54.3 V
is set with
and
.
3.
The display then switches back to the main page and the set values take effect.
Upon entering a value which exceeds the corresponding limit, a note would pop up, the value
in the frame reset to 0 and not be accepted and submitted.
