EA-ELEKTRO-AUTOMATIK PS 2000 B Bedienungsanleitung Seite 16

Operating the device
4. Handling
4.1 The display
Figure 3
4.1.1 Status tokens
The status tokens in the display indicate following:
CV - Voltage regulation active (only if output is „on")
CC - Current regulation active (only if output is „on")
Preset V/C - Set value display of voltage/current active
Preset OVP/OCP - Set value display of OVP/OCP active
OT - Overtemperature error
OCP - Overcurrent protection
OVP - Overvoltage protection
Remote - Remote control active (via USB)
Lock - Control panel lock active
Fine - Indicates activated fine adjustment mode
4.1.2 Error indication
If an error like overvoltage, overcurrent or overtempera-
ture occurs it is displayed by the text „Error" and a token
(OT, OCP, OVP) and the output voltage is cut off. The text
remains in the display until the user has acknowledged
the error with the „On/Off" button, which will also switch
the output off. After an overtemperature error, the output
voltage will return automatically and „Error" will be cleared,
unless the output has been switched off by the user. Other
errors require the user to switch the output on again, in
order to continue working with the device.
Other display elements are connected to certain operation
modes and are explained in the following sections.
16 Date: 07-02-2018
4.2 Pushbuttons
4.2.1 Pushbutton Preset
This button is used to switch to preset mode and for acti-
vation/deactivation of the LOCK mode.
Push Display
1x
2x
3x
4x
4.2.2 Pushbutton On/Off
This pushbutton is used to manually switch the power out-
put on or off, as long as the device is not in remote control.
The state of the output is indicated by
or in the display.
The pushbutton may be locked by the LOCK state. See
above. Also see „4.5 Control panel lock (LOCK)".
The button also acknowledges errors. See section 4.1.2
for details.
4.3 Further control elements
Knobs Voltage & Current
These two rotary knobs have no stop and are used to adjust
set values. Assignment:
• Left knob - Voltage (U) or OVP, depending on mode
• Right knob - Current (I) or OCP, depending on mode
For details read below.
4.4 Adjusting set values
When adjusting the set values of voltage (U) and current (I),
a rule becomes active where both set values adjust each
other in order to not exceed the max. power of the device
according to P = U * I
max set
It applies for preset mode and normal operation:
a) If the output is on and constant voltage regulation is
active („CV" in the display) and if the current set value
is adjusted beyond a certain limit which is defined by the
formula: current set value = maximum power / voltage
set value, then the voltage set value will be reduced
automatically according to the same formula, in order to
maintain the maximum power.
b) If the output is on and constant current regulation is
active („CC" in the display) and if the voltage set value
is adjusted beyond a certain limit which is defined by the
formula: voltage set value = maximum power / current
set value, then the current set value will be reduced
automatically according to the same formula, in order to
maintain the maximum power.

If the OCP value is identical to the current limitation
value and if that limitation is reached, the OCP will have
priority and switch the output off.
Mode
Display of U/I set values
Display of OVP/OCP set
values
Activation/Deactivation of
LOCK mode (also see 4.5)
Display actual values again
.
set
Instruction manual
PS 2000 B Single Series
EN