Ea Elektro Automatik EA Elektro-Automatik EA-PS 2042-20B 320W 1 Output Programmable DC Power Supply, Switched Mode, Bench 39200114 사용자 설명서
제품 코드
39200114
14
EN
Instruction manual
PS 2000 B Single Series
Date: 27-02-2012
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
4.1.2 Error indication
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
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
Other display elements are connected to certain operation
modes and are explained in the following sections.
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
Mode
1x
Display of U/I set values
2x
Display of OVP/OCP set
3x
Activation/Deactivation of
4x
Display of U/I actual values
Set values are not stored when switching off the de-
vice and after the next start they are reset to 0% voltage
and 100% current.
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 „5.5 Control panel lock (LOCK)“.
The button also acknowledges errors. See section 5.1.2
The button also acknowledges errors. See section 5.1.2
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.
• 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
max
= U
set
* I
set
. It applies:
• In
Preset mode
If the output is off and the voltage set value is increased,
the current set value will automatically decrease some-
time or if the current set value is increased, the voltage
set value will automatically decrease sometime. For the
output being on, it will behave like in normal operation.
• During
normal operation
a) If the output is on and
constant voltage regulation
is active (CV in the display), then the
current set value
can only be increased to a certain limit which is defined
by the formula: maximum power = voltage set value *
current set value (depending on the voltage set value)
b) If the output is on and
b) If the output is on and
constant current regulation
(CC in the display) is active, then the
voltage set value
can only be increased to a certain limit which is defined
by the formula: maximum power = voltage set value *
current set value (depending in the current set value)
The OVP threshold can be set to lower than the voltage
set value! This can result in an immediate OV error.
If the OCP value is identical to the current limitation
and that limit is reached, the OCP will have priority and
switch the output off.
Adjusting values manually can be done in
Adjusting values manually can be done in
fine or coarse
steps. Switching is done by pushing the corresponding
knob. In normal operation, coarse adjustment mode is
default. If fine adjustment is selected and if no value has
been changed for more than 10 seconds, the adjustment
mode will automatically return to coarse. In Preset mode,
the selected adjustment mode is held until Preset mode is
aborted manually or automatically.