33
Instruction Manual
EL 3000 A Series
EN
Date: 12-05-2011
6.2 Operating elements
Mains switch
Power (1)
Is used to switch the device on or off.
Selector
Mode (2)
Is used to preselect the regulation
mode in which the device shall
work. The different regulation mo-
des effect each other. As soon as
actual values reach set values, the
regulation mode changes. This can, for example, lead to
a dominance of the constant power control (CP), even if
the constant current control (CC) is set as active mode.
The currently active regulation mode is indicated in the
display. More about the different regulation modes in
section „6.6 Preselecting the regulation mode“.
Following regulation modes are selectable:
CC
Constant current regulation
CV
Constant voltage regulation
CP
Constant power regulation
CR
10R
Constant resistance regulation in range 1*
CR
400R
Constant resistance regulation in range 2*
*the shown range values are examples
The switchover of the regulation mode switches the load
input off and the set value that is related to the currently
chosen regulation mode is addressed for adjustment
(arrow in front of the value). Other set values can also be
accessed and adjusted in the described manner.
Note: Preselection of CV enable adjustment of the voltage
set value. Same applies for the resistance value and CR.
Selector
Level Control (3)
Is used to select the operation mode
between normal operation mode
(
A
and
B
), pulsed mode (
A/B
) and
battery test mode. All 4 modes have
an own set of set values. That means,
that you can adjust different set va-
lues for U, I, P etc. for
A
than for
B
. When selecting a
different regulation mode with
Mode(2)
the set values
will be reset to certain default values, if the setting
Keep
set values
is set to
no
(see „7. Device configuration“ for
details). Using
Level Control(3)
switches the load input
off, except if changed from
A
->
B
or
B
->
A
, because these
positions are used to manually switch between the two
levels.
The most recent set values are stored inside the unit
when the unit is switched off or at mains undervoltage
(power fail), and are restored after switching it on again,
if the setting
Keep set values = yes
has been chosen.
Explanation of the selector positions:
A
Switches to the set values of Level A. These
values become instantly active and can be
changed now.
B
Switches to the set values of Level B. These
values become instantly active and can be
changed now.
A/B
Switches the load offline and activates the
pulsed mode (frequency controlled, automatic
changeover between level A and B).
Battery
Switches the load offline and activates the
battery test mode.
Setup
Switches the load offline and activates the
setup menu. Here the device and the interface
card (if equipped) are configured.
More about the operation modes on section„6.7 Usage
of Level A and Level B“.
Pushbutton
Input on/off (4)
Is used to activate or deactivate load operation
(i.e. input on/off). Input off is indicated in the
display with
Standby
. Switching the input on
can be inhibited by several reasons. For ex-
ample, if an error is persistent or the input is blocked by
the REM-SB pin of the analogue.
In battery test mode, the time counting is halted or conti-
nued if the button is pressed to switch the input on or off.
It is also used to acknowledge the alarm indication in
the display. By pushing the button, the indicated error is
cleared (as long as no alarm is still active) and the button
can be used as normal.
In remote operation, i.e. control via a digital interface
card, the button can be used to forcibly reset from remote
operation by pressing >3s.
New since Firmware 5.01: in mode „Battery“, the button
can be used to reset time and Ah counter, if pressed >3s
in offline state.
Rotary knob
Selection (5)
This rotary knob has no end stop. With every
position
Selection(5)
selects another ele-
ment in the display resp. another parameter
in the setup menu. An arrow (->)is placed
in front of the selected element/parameter.
The selection order is, when rotating clockwise, top left-
>bottom left->top right->bottom right. That means, if the
arrow is pointing to the voltage set value it will be moved
to the set value for current and then to the power set value
etc., when rotating clockwise.
Counter-clockwise rotation moves the arrow in reversed
order.
Handling the device
