35
EN
Instruction Manual
EL 9000 HP Series
Date: 05-31-2011
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, default set values are set. The load‘s DC input will
always be offline after the first start.
If the setting
Keep set values
is set to
yes
, then the most
recent set values are restored when switching the unit on.
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 it 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 current,
voltage, power and resistance are indicated on the left
half of display.
When the load input is off, only the actual value of volta-
ge 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
it changed again by rotating the knob in the opposite
direction.
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 B can upwards
only be adjusted to the value of Level A and Level
A can downwards only be adjusted to the value of
Level B.
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
.
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 effects the
maximum current. The power limitation is dominant over
the current limitation
The manual 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
CV
means constant voltage. Here are the set values of
voltage, current and power adjustable. In this mode the
input voltage is limited to the adjusted set value by loading
the feeding source so much that its output voltage collap-
ses. If the feeding source is able to deliver more current
than the device is able to withdraw, then the voltage limit
can not be achieved.
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