MCA -Serie
FuG Elektronik GmbH, Am Eschengrund 11, D - 83135 Schechen
File: MCA Rev_3 Englisch.docx
Rev 3
9 von 16
4. Operation with local controls
The unit delivers dangerously High Voltage!
Please notice in particular safety instructions in section 1
and Load and 0V connection in section 2.2
Select local operation
If your power supply is equipped with one of the options analog or digital
programming, set switch (4) to LOCAL.
Save switch on
First, set switch OUTPUT (2) to OFF.
Now, you can switch on the Power Switch (1). The output will remain OFF.
The LED LOCAL (6) is on, indicating local operation.
Set value Display
Shortly pressing SET VALUES (16) switches both displays to display the valid set
values.
With potentiometers Voltage (10) and Current (11) the needed setvalues can be
adjusted.
The displays begin to flash, indicating the set value display mode, and switch back
after some seconds to actual value display.
Pressing the SETVALUES key longer than app. 2 seconds, the displays stay in set
value display mode until the key is pressed again.
Adjustment Range
The internal potentiometers provide an adjustment range of appr. 0,1% to 100% of
their nominal value.
Adjustment of voltage limit
Turn the voltage potentiometer clockwise to its limit and switch to set value display.
Now you can adjust the maximum voltage with a screwdriver on potentiometer (17).
During this, the LED V-LIMIT is on and the limitation voltage is displayed on the left
display.
If you wish no limitation, simply turn the potentiometer (17) clockwise to it's limit. LED
V-LIMIt goes off.
Turn voltage potentiometer back to the desired setvalue and switch display mode to
actual value display (press key SET VALUES (16))
The voltage limitation is always active. It limits the maximum output voltage
also in operating mode analog programming or digital programming.
OUTPUT release
After adjustment of the set values, the output voltage can be release with switch
OUTPUT (2).
The LED ON (3) indicates the released output.
Control mode indication
Depending on the adjusted set values and connected load, the power supply will run
either in constant voltage CV (14) or constant current mode CC (15).
Power Limitation
The output power is limited to the maximum value 750W / 1500W / 3000W.
The operation in power
limitation is indicated by the yellow LED “Power Limit”.
The transition between voltage control, current control and power limitation occurs
automatically.
Save switch off
The following switch off procedure is recommended:
First, inhibit the output with key OUTPUT (2). LED ON (3) goes off.
After the output voltage has reached a low and save value, you can switch off the
power supply with switch POWER.
This procedure gives you more safety, because the slow ramping down of the output
voltage can be monitored on the display.
At immediate switch off with POWER switch, there could be charged capacitors
remaining on dangerously high voltage that cannot be recognized.
