User manual

Page 32
ELR/ELM 5000 Series
www.elektroautomatik.de
[e-mail]
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
Element Description
Touch Panel
Calibration
Starts a calibration process for the touch screen. After calibration the touch areas should
react better and more accurately to nger touches. After every device reset which resets
the device to factory defaults it will require to perform touch panel calibration again.
3.4.4 Adjustment limits
Adjustment limits are only effective on the related set values, no matter if using manual adjust-
ment or remote control!
Adjustment are intended to prevent the deliberate setting of wrong, i. e. too
high values, primarily when using direct input or remote control.
By default, all set values (U, I, P) are adjustable from 0 to 100%. This may be
obstructive in some cases, especially for protection of applications against
overcurrent. Therefore upper and lower limits for current (I) and voltage (U)
can be set which limit the range of the adjustable set values.
For power (P) only an upper value limit can be set.
► How to congure the adjustment limits
1. On the main screen, tap , then and then .
2. Tap the desired value to select it for adjustment.
3. Adjust the value(s) with the rotary knob or per direct input.
4. Accept the settings with .
The adjustment limits are coupled to the set values. It means, that the upper limit may not be
set lower than the corresponding set value. Example: If you wish to set the limit for the power
set value (P-max) to 200 W while the currently adjusted power set value is 250 W, then the set
value rst would have to be reduced to 200 W or less in order to set P-max down to 200 W.
3.4.5 Manual adjustment of set values
The set values for voltage, current and power are the fundamental operating possibilities of an electronic load and
hence the rotary knob on the front of the device is always assigned to one of the three values in manual operation.
Default assignment is the voltage.
The set values can be entered manually in two ways: via rotary knob or direct input.
Entering a value changes it at any time, whether the input is switched on or off.
When adjusting the set values, upper or lower limits may come into effect. See section „3.4.4.
Adjustment limits“. Once a limit is reached, the display will show a text “Limit: U-max” etc. for
1.5 seconds above the selected set value.
► How to adjust values with the rotary knob
1. First check if the value you want to change is already assigned to the rotary knob.
The main screen shows the assignment as depicted in the gure to the right, by
displaying the selected value in inverted form (white background).
2. If, as shown in the example, the assignment is voltage (U, left) and current (I, right),
and it is required to set the power, then the assignments can be changed by tapping
this touch area. A set of selection elds then appears.
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):