User Manual

20
EN
Instruction manual
PS 2000 B Triple Series
Date: 11-21-2011
Operating the device
5. Behaviour of the device
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 outputs are off
• The current set values are set to maximum and the
voltage set values to minimum (i.e. 0V)
• The set values of overvoltage and overcurrent protection
are set to maximum
• Any condition like REMOTE, LOCK or TRACKING 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 voltage of the corresponding output (main output 1
or 2 only) and indicate the error in the display by the text
„Error“. This error has to be acknowledged rst by the On/
Off pushbutton. Then the display will change to normal
display again. Also see section 4.2.2.
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.
 In parallel connection of the main outputs 1 and 2, the
output voltage of one output can cause an OV error on the
other output if the OVP threshold of the effected output is
set lower. In such a case it is recommended to either adjust
the OVP thresholds of both outputs to the same value or to
use tracking mode, which will handle this matter.
5.3 Overtemperature
If the unlikely event of an overtemperature (OT) error occurs
by internal overheating, the voltage of the corresponding
output is cut off and the status token „OT“ is shown in the
related 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 corresponding 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 threshold (see section 4.4) to lower than the current
limitation, because else the current is just limited.
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 active,
only the particular preset button can be used to deactivate
LOCK again. The LOCK condition can be set seperately
for the left-hand and right-hand control panels. Exception:
the right-hand control panel is locked during tracking mode
and can only be unlocked by leaving tracking mode.
 While LOCK is activated, the output can not be swit-
ched off manually, not even in an emergency!
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 nished. After this, the
control panel LOCK is active.
b) Push the preset button once again and abort the count-
down. LOCK is then not activated.
Deactivation is done by pushing button „Preset“, which
causes the countdown to run again. If it runs out, LOCK
remains active. If the countdown is aborted by pushing the
button again, LOCK will be deactivated.
4.6 Tracking mode
The tracking mode is used to control both main outputs 1
and 2 simultaneously and with identical set values by using
only the left-hand control panel. This is especially useful
when running these outputs in parallel or series connection.
Following applies:
• Tracking can only be activated or deactivated if both
outputs are switched off
• In tracking mode, the right-hand control panel is deac-
tivated
• The left-hand control panel (output 1) is used to adjust
set values (U, I) and thresholds (OVP, OCP) for both
outputs. The values are submitted to the right-hand panel
• The set values of output 2 follow the set values of output
1, the actual values are load-depending
• Tracking mode can also be activated or deactivated by
a command during remote control
• In parallel connection, the actual values of the outputs
are indicated on the related display