User Manual

Page 48
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSB 9000 2.5 kW 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 mode, sink and source, the device has separately adjustable set values for current, power and resistance
which are labelled accordingly in the display. The resistance value is connected to the “R mode”, which can be
activated in the MENU, in the General Settings. Refer to „3.5.3. Conguration via MENU“ as well as „3.3.4. Internal
resistance regulation (source mode)“ and „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. While the rotary knobs adjust
values continuously, entering them via numeric pad can be used to change values in bigger steps.
Entering a value changes it immediately and no matter if the DC power stage is switched on or o.
When adjusting set values, upper and lower limits may come into eect. See section „3.5.4. Ad-
justment 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 or will refuse to accept a value entered by direct input.
► 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guretotheright.
2. If, as shown in the example, the assignment is voltage (U, left) and power (P, right),
and it’s 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 unit being display inverted.
3. Aftersuccessfulselection,thedesiredvaluecanbesetwithinthedened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e󰀨ect.
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.