User manual

19
Instruction manual
PS 2000 B Triple Series
EN
Date: 06-10-2013
4.2 Pushbuttons
4.2.1 Pushbuttons Preset
These button are used to switch to preset mode and for
activation/deactivation of the LOCK mode, as long as the
unit is not in remote control.
Push Display Mode
1x Display of U/I set values
2x Display of OVP/OCP set
values
3x Activation/Deactivation of
LOCK mode (also see 4.5)
4x
Display actual values again
 In tracking mode, the preset button of the right-hand
control panel is inactive. The preset display of the right-
hand display is then controlled via the left-hand control
panel. Also see section „4.6 Tracking mode“.
4.2.2 Pushbuttons On/Off
These pushbuttons are used to manually and seperately
switch the power outputs 1 and 2 on or off, as long as the
device is not in remote control. The state of the particular
output is indicated by
or in the related display.
The pushbuttons might be locked by the LOCK state. See
„4.5 Control panel lock (LOCK)“.
The buttons also acknowledge errors. See section 4.1.2
for details.
4.3 Further control elements
Knobs Voltage & Current
These rotary knobs have no stop and are used to adjust
set values. Assignment:
• Left knob on the control panel:
Voltage (U) or overvoltage threshold of the dedicated
output, depending on preset mode
• Right knob on the control panel:
Current (I) or overcurrent threshold of the dedicated
output, depending on preset mode,
For details read below.
Operating the device
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
max
= U
set
* I
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 dened 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 dened 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.
 All set values are internally stored every 10 seconds
and restored after powering the device next time. Thus it
is recommended to wait at least 10 seconds after the last
adjustment of any value and before switching the device
off, else other values are restored the next time.
4.4.1 Fine adjustment
Adjusting values manually can be done in ne or coarse
steps. Switching between coarse and ne adjustment
mode is done by pushing the corresponding knob. Coarse
adjustment mode is default when switching the device on.
Activated ne adjustment mode is indicated in the display
with FINE. It remains until it is deactivated again or the
device is switched off.