Elektro-Automatik PS 2000 B Serie Bedienungsanleitung Seite 15

Operating the device
Following step widths apply in dependency of the nominal
values (also refer to technical specs):
Voltage
Nom. value coarse fine
42V 1V 0.05V 3A / 5A / 6A 0.1A
84V 1V 0.1V
4.5 Control panel lock (LOCK)
The control panel LOCK is intended to prevent unintentional
use of the pushbuttons and knobs. LOCK ist activated or
deactivated using the preset button.

While LOCK is activated, the output can not be swit-
ched off manually, not even in an emergancy!
Activation is done by pushing the preset button three
times until the display shows following:
Figure 4
A countdown will be running. During this countdown you
have two options:
a) Wait until the countdown has finished. After this, the
control panel LOCK is active.
b) Push the button once again and abort the countdown.
LOCK is then not activated.
Deactivation is done by pushing button Preset again. The
countdown will start again. If it runs out, LOCK remains
active. If the countdown is aborted by pushing the button
again, LOCK will be deactivated.
Instruction manual
PS 2000 B Single Series
Current
Nom. value coarse fine
0.01A
10A / 20A 0.1A 0.01A
5. Device characteristics
5.1 Switching on by power switch
The power switch is located at the front. After the device
is started, following situation will be set:
• The output is off
• The current set value is set to 100% and the voltage set
value to minimum (=0V)
• The set values of overvoltage and overcurrent protection
are both set to maximum
• Any condition like REMOTE or LOCK is reset.
5.2 Overvoltage
An overvoltage error can occur due to an internal defect
(output voltage rises uncontrolled) or by a too high voltage
from external.The overvoltage protection (OVP) will switch
off the output and indicate the error in the display by the
text „Error". This error has to be acknowledged first by the
On/Off pushbutton. Then the display will change to normal
display again. Also see section 5.2.2.
External voltages higher than 120% nominal voltage at
the output must be avoided, or else internal compon-
ents of the device might be destroyed!
If the cause of the overvoltage is removed, the output can
be switched on again.
5.3 Overtemperature
If the unlikely event of an overtemperature (OT) error oc-
curs by internal overheating, the output voltage is cut off
and the status token „OT" is shown in the display, together
with the text „Error". The output will automatically switch
on again after the unit has cooled down. In case this is not
wanted, the output can be manually switched off during the
overtemperature period.
5.4 Overcurrent
The device can react in two different ways to overload
resp. overcurrent:
1. By switching the output off (OCP) or
2. By limitting the output current (CC)
In order to switch the output off, it is required to adjust
the OCP value (see section 5.4) to lower than the current
limitation, because else the current is just limited.
Date: 22-05-2012
EN
15