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© 2006, Elektro-Automatik GmbH & Co. KG
Irrtümer und Änderungen vorbehalten
EN
Instruction Manual
EL 3000 A Series
Date: 05-30-2017
Handling the device
Rotary knob
Setting (6)
This rotary knob has no end stop. With every
position
Setting (6)
changes the set value
resp. the parameter (in the setup menu)
which was chosen before by
Selection (5)
.
It applies: the faster the knob is rotated,
the faster the set value is increased or decreased (the
step width changes). Slow rotation hence changes the
set value in small steps, while fast rotation changes it in
big steps.
In case the upper or lower limit of the set value is reached
while rotating, the set value will remain at its limit until
it changed again by rotating the knob in the opposite
direction.
6.3 Switching power on
The device is powered by switching the mains switch.
After powering the device up type and firmware version
are shown on the display.
After the internal system has booted and performed
some tests, either default set values are set or the last
set values are restored, depending on the setting
Keep
set values
. The load‘s DC input will always be offline
after the first start.
6.4 Switching the DC input on/off
By pressing the pushbutton
Input on/off (4)
the DC input
of the load input is switched on and the device starts to
work as a load.
Pressing the button again switches the input off.
The input can also be switched off with the pin named
„REM-SB“ on the analogue interface (pin = low), if is was
on before. Switching the input on if it was off before is
not possible.
While the load is working, all four actual values of cur-
rent, voltage, power and resistance are indicated on the
left half of display.
When the load input is off, only the actual value of volt-
age is indicated, because there are no reasonable other
actual values available at this moment. In battery test
mode, the time counter is also halted resp. continued if
the pushbutton is pressed.
The activation of the load operation can be inhibited by
certain reasons. For example, if an overvoltage or another
error is persistent or the load is remotely controlled by the
analogue or digital interface (interface card).
The standby state (input = off) is displayed like this:
Figure 8
6.5 Adjusting the set values
Note: Set values, which must not be changed in the cur-
rently selected regulation mode, are not shown and can
not be selected/changed.
Set values can be selected and adjusted as long as the
display does not show the status texts
External mode
or
Remote mode
.
a) Selecting the set value to adjust
In the operation modes
A
,
B
,
A/B
and
Battery
the set
value to change is selected by rotating
Selection (5)
.
In the setup menu (position
Setup
) it is used to select a
different setup parameter. Also see „7.1 The setup menu“.
b) Adjusting the set value
The previously with
Selection (5)
selected set value is
changed with
Setting (6)
. It applies: the faster the knob is
rotated, the faster the set value is increased or decreased
(the step width changes). Slow rotation hence changes
the set value in small steps, while fast rotation changes
it in big steps.
In case the upper or lower limit of the set value is reached
while rotating, the set value will remain at its limit until
changed again by rotating the knob in the opposite di-
rection.
Important! Note, that in Level A/B mode any set value
of Level A must always be greater than or equal to
Level B! The result of this is, that Level A can only
be adjusted down to the value of Level B and Level
B can only be adjusted up to the value of Level A.
6.6 Preselecting the regulation mode
The selector
Mode (2)
preselects the regulation mode
which determines the internal regulation characteristic.
Four regulation modes are available:
CC, CV, CP
and
CR
. The set values will later determine the true behaviour
of the device.
CC
means constant current. Here are the set values
of current and power adjustable. In this mode the input
current is regulated and limited to the adjusted value
(current limitation), as far as the feeding source is able to
deliver the current. The set value of power is additionally
limitting the consumed power and additionally effecting
the maximum current. The power limitation is dominant
over the current limitation.
A changeover to regulation mode
CC
can reset the set
value of power to its nominal value and the set value of
current to 0, if the parameter
Keep set values
has been
set to
no
in the setup. If set to
yes
, the least adjusted set
values are kept. Also see „7.1 The setup menu“.
CV
means constant voltage. Here are the set values
of voltage, current and power adjustable. In this mode
the input voltage is limitted to the adjusted set value by
loading the feeding source so much that its output voltage
collapses. If the feeding source is able to deliver more
current than the device is able to withdraw, then the volt-
age limit can not be achieved.
