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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
EL 9000 B 15U/24U Series
3.4.6
Manual adjustment of set values
The set values for voltage, current, power and resistance are the fundamental operating possibilities of an elec-
tronic load and hence the two rotary knobs on the front of the device are always assigned to two of the four values
in manual operation. Default assignment is power and current.
Set values can be entered manually in two ways: via
rotary knob
or
direct input
. The important difference is, that
rotating the knob adjusts a value
gradually
, while direct input causes a
step / jump
.
Entering a value changes it immediately, no matter if the DC input is switched on or off.
When adjusting set values, upper or lower limits may come into effect. See section
justment limits“. Once a limit’s reached, the display will show a note like “Limit: U-max” etc. for
1.5 seconds next to the adjusted value.
►
How to adjust values 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 current (I, right),
and it’s required to set the power, then the assignments can be changed by tapping
this touch area. A set of selection fields then appears.
3.
After successful selection, the desired value can be set within the defined limits. Selecting a digit’s 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 the small keypad symbol in the set/actual
value display areas, e.g in the uppermost area of 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 reverts to the main page and the set values take effect.
3.4.7
Switching the main screen view
The main screen, also called status page, with its set values, actual values and device status can be switched
from the standard view mode with three or four values to a simpler mode with only voltage and current display.
The advantage of the alternative view mode is that actual values are displayed with
much bigger characters
, so
they read be read from a larger distance. Refer to
to see where to switch the view
mode in the MENU. Comparison:
Standard status page
Alternative status page
