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CV/CC Operating Mode of Power Supply
Power supply can automatic transfer constant voltage/current function. Power supply can ongoing switch the constant
voltage/current function dependends on load fluctuation.
If the current load is on the constant voltage mode, power supply provide a controlled output and voltage. As the load
resistance value decreases, the output voltage remains constant until the output current increases to greater than the
preset current value, which it will convert operating mode. If the power supply turn into constant current output, the
output voltage will decrease proportionally according to resistance value of the load. When the current value less than
the set value, power supply will back to the constant voltage mode.
Troubleshooting
Power supply is no output
1． Check the set value of voltage and current is zero or not. If it is, reset the voltage and crrent value.
2． OUTPUT indicator light is light on or not. If it is, push OUTPUT key to enable the output function.
3． Check OVP，OCP，OTP function is activated or not. If it is, reset the value of OVP, OCP and wait the power supply
remain stable to turn the output function.
4． If Remote Sense compensation function has been enabled, check the line loss of output cable is excced thelimit
value or not. If it is, replace the output cable or decrease the output current, and then try to enable the power
supply again.
The keyboard is not work
Check Lock indicator light is light on or not. If it is, please refer to Lock section to reset again.
Remote Communication
The installment and startup configuration file
1. Download the installment file from official website;
2. Turn on power supply；
3. Connect the control line of RS232 to control power supply；
4. Activate the remote controlling application program；
5. Click Euqipments List, and double-click the power supply symbol of UDP6720 or UDP6721 to enter the remote
communication interface.
UDP6720 Series Digital Control Power Supply User's Manual
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