Constant Current Output; Power Supply Series And Parallel Connections - UNI-T UDP3305S Series User Manual

corresponding key through the prompt unit V or mV at the bottom of the screen.
6. Set overvoltage and overcurrent protection:
The method is the same as the voltage and current setting. After setting the values, press the "Overvoltage" or
"Overcurrent" key to turn on/off the overvoltage and overcurrent protection.
Note: ☑ means turning on the protection, and ☐ means turning off the protection.
7. Turn on the output:
Press the key to turn on the output of the corresponding channel and the actual output voltage, output
current, ON/OFF state, output power as well as the output mode (CV/CC) are high-lighted in the user interface.
8. Check the output mode:
In constant voltage output mode, the output mode displayed should be "CV"; if
"CC" is displayed, users can increase the current setting value properly and the power supply will switch to CV
mode automatically.
4.2

Constant Current Output

Operation steps:
1. Press the power switch to power on the instrument.
2. Select the channel:
Select the channel according to the voltage and current required by the load. Press the corresponding channel
selection key; at this point, this channel and its output state are high-lighted on the screen.
3. Connect the load:
Connect the load to the selected channel.
4. Set the voltage:
It is the same as setting voltage in constant voltage mode.
5. Set the current:
It is the same as setting current in constant voltage mode.
6. Set overvoltage and overcurrent protection:
It is the same as setting overvoltage and overcurrent protection in constant voltage mode.
7. Turn on the output:
Turn on the output of the corresponding channel and the actual output voltage, output current, output power
as well as the output mode (CC) are high-lighted in the user interface.
8. Check the output mode:
In constant current output mode, the output mode displayed should be "CC"; if
"CV" is displayed, users can decrease the current setting value properly and the power supply will switch to CC
mode automatically.

4.3 Power Supply Series and Parallel Connections

Higher voltages can be provided when two or more insulated channels (the channels can be from a single power
supply or multiple power supplies) are connected in series. Higher currents can be provided when two or more
insulated channels (the channels can be from a single power supply or multiple power supplies) are connected in
parallel. UDP3305S series power supply's series and parallel connections do not require external wiring. Press "
" or " " to realize the connections, but it is limited to the series and parallel connections between CH1 and CH2.
If users need to connect the UDP3305S series power supply in series and parallel with other power supply channels,
they can only realize it through external wiring, as shown in the figure below, but pay attention to the following
points.
UDP3305S Series Programmable DC Power Supply User Manual