UNI-T UDP3303C-U Linear DC Power Supply
Preface
Thank you for purchasing the new linear DC power supply. In order to use this product safely and correctly, please read this manual thoroughly, especially the Safety Information part. After reading this manual, it is recommended to keep the manual at an easily accessible place, preferably close to the device, for future reference.
Limited Warranty and Liability
Uni-Trend guarantees that the product is free from any defect in material and workmanship within 3 years from the purchase date. This warranty does not apply to damages caused by accident, negligence, misuse, modification, contamination or improper handling. The dealer shall not be entitled to give any other warranty on behalf of Uni-Trend. If you need warranty service within the warranty period, please contact your seller directly.
Uni-Trend will not be responsible for any special, indirect, incidental or subsequent damage or loss caused by using this device.
Safety Information
Important safety instructions must be followed for operating and storing the UDP3303C-U series. To ensure your personal safety, read the following instructions carefully before operation to ensure that the UDP3303C-U series is in the best working environment.
Safety Symbol
Safety Guidelines
General Introduction
- Do not block and isolate the air inlet and vent
- Avoid physical impact or using the instrument improperly
- Do not discharge static electricity onto the instrument
- Only professionals should open the instrument
AC Input
- AC input voltage: 110V/120V/220V/230V, 50/60Hz
- Connect the protective ground wire to the earth to avoid shock hazard.
Fuse
- Make sure to use the correct fuse type before starting up
- To prevent fires, only replace with fuses that meet the model and rating value
- Do not connect the power before replacing the fuse to avoid electric shock
- Confirm the cause of the blown fuse before replacing it
Power Supply
AC input voltage includes 100V/120V/220V/230V ±10%, 50/60Hz. You can select different input voltages through the “AC SELECTOR” on the rear panel as need, please disconnect the power before switching the input voltage.
UDP3303C-U Linear DC Power Supply Introduction
The UDP3303C-U DC power supply has three independent outputs: two of them are adjustable outputs of 30V/3A, the other one is a fixed selectable output of 1.8V/2.5V/3.3V/5V/3A (fine adjustable). The device also has the constant voltage (CV) and constant current (CC) modes, short circuit and overvoltage protection features.
UDP3303C-U Main Features
- 4-digit voltage and current high-precision display
- Overvoltage and overcurrent protection
- Output voltage/current settings are viewable
- Remote control (output ON/OFF)
- USB-Device communication interface (can be used in software upgrade and upper computer control power output)
- RS232 interface
- 5 sets of setup storage: M1-M5
- Shutdown memory
- Buttons lock
- Intelligent temperature-controlled fan
- USB phone charging interface
Main Index Parameters
Test conditions: Turn on the device for 30 minutes at a temperature of +20°C~+30°C.
Function Introduction
- Voltage / Current Setting and Output
- Voltage setting: Press CH1 button, the cursor will flash on the CH1 voltage position, press the voltage knob to move the cursor and rotate the knob to adjust the voltage value;
- Current setting: Press CH1 again, the cursor will flash on the CH1 current position, press the current knob to move the cursor and rotate the knob to adjust the current value.
- Press CH2 to set the CH2 voltage and current values with the same method above.
- Press the OUTPUT button to enable CH1, CH2 and CH3 outputs after voltage and current setting.
- With the shutdown memory function, the last set value can be automatically restored when the device is started next time.
The operation and display interfaces are as follows:
Series and Parallel Settings
Series Settings:
- Press CH1 button for 3 seconds to enter series mode, the “SER” symbol will be on. CH1+ is the main positive output of series and CH2- is the slave negative output. The series voltage and current settings can only be adjusted in CH1, and the CH2 settings will follow that of CH1.
- The series voltage total set value is twice of CH1, and the current total value equals to CH1.
- To exit the series mode, long press the CH1 button for 3s, the “SER” symbol will disappear.
- With the shutdown memory function, the last voltage/current settings and the series mode will be restored when the device is restarted.
The series output connection is as follows:
Parallel Settings:
- Press CH2 button for 3s to enter parallel mode, the “PARA” symbol will be on. CH1+ is the main positive output of parallel and CH1- is the slave negative output. The parallel voltage and current settings can only be adjusted in CH1, and the CH2 settings will follow that of CH1.
- The parallel voltage total value equals to the CH1 voltage, and the current total value is twice of CH1.
- To exit the parallel mode, long press CH2 button for 3s, the “PARA” symbol will disappear.
- With the shutdown memory function, the last voltage/current settings and the parallel mode will be restored when the device is restarted.
The parallel output connection is as follows:
Constant Voltage / Constant Current
In constant voltage mode, the output current is lower than set value, the channel indicator will be green (CV), and the voltage keeps as set value. If the output current reaches the set value, the device will switch to the constant current mode.
In constant current mode, the channel indicator will be red (CC). The output current is equal to set value and the voltage is lower than set value. If the output current is lower than the set value, device will switch to the constant voltage mode.
The channel indicators are shown below:
OVP (overvoltage protection), OCP (overcurrent protection) Setting and Enabling
- Long press OVP button (>3s) to enter OVP threshold setting, press CH1 or CH2 to select the channel, then rotate the voltage knob to set the OVP limit, long press OVP button again to exit the OVP setting.
Short press OVP button (backlight on) to enable the overvoltage protection, if the output voltage exceeds the OVP set limit, the output will be shut off, and the OVP symbol will disappear later. Short press OVP button again (backlight off) to disable overvoltage protection. - Long press OCP button (>3s) to enter OCP threshold setting, press CH1 or CH2 to select the channel, then rotate the current knob to set the OCP limit, long press OCP button again to exit the OCP setting.
Short press OCP button (backlight on) to enable the overcurrent protection, if the output current exceeds the OCP set upper limit, the output will be shut off, and the OCP symbol will disappear later. Short press OCP button again (backlight off) to disable overcurrent protection.
Remote Control DIGITAL I/O Interface
To remotely control the output and shutoff of CH1/CH2, you can short-circuit or disconnect the pin 1 and 2 of the DIGITAL I/O terminal by a short-circuit wire or an external relay. The specific operations are as follows: When the pin 1 and 2 of the DIGITAL I/O terminal are short-circuited, the OUTPUT button on the front panel is disabled, the power output is forcibly turned on, and the ON symbol appears on the LCD. When the short circuit is released, the OUTPUT button function is restored, and the power output is turned off, the OFF symbol appears on the LCD.
The DIGITAL I/O port is shown in the following figure:
CH3 Output
The CH3 has 4 sets of fixed outputs which are 1.8V/2.5V/3.3V/5.0V/3A, which can be fine adjusted by OUTPUT button. By pressing the CH3 button, the output voltage can be switched between 1.8V/2.5V/3.3V/5.0V and the corresponding indicator will be on. Double press the CH3 button, the cursor will flash on CH3 voltage and can be fine adjusted. The shutdown has a memory function. The last set value will be restored when the device is started up next time.
The CH3 operation and display interfaces are as follows:
M1-M5 Store/Recall Functions Introduction
After output parameters are set, long press one of the M1-M5 buttons (>3s) to save the setting. Short press one of the M1-M5 buttons to recall the stored data with the button’s backlight on.
USB Interfaces
The USB_Host interface on the front panel is not for communication but for an independent CH4 channel, which comes with fixed output of 5V/2A, can be used to charge the mobile phone and so on.
The USB_Device interface on the rear panel comes with a communication function for software programming and upgrade, and output control of power supply by upper computer.
RS232 Interface
The RS232 interface on the rear panel comes witha communication function for software programming and upgrade, and output control of power supply by upper computer.
OTP (over-temperature protection) Overview
Inside the power supply, there are two thermistors placed on the heat sink which has the maximum heat.
Once the power supply fails and the temperature of the heat sink reaches about 100℃, the over-temperature protection is triggered, and the output will be turned off with the “OTP” symbol flashing on the LCD screen and periodical beeps.
The “OTP” symbol disappears when any key is pressed.
SET VIEW Introduction
When the power output is on, the voltage and current displayed on the LCD are the real-time sampling output values.
Press SET VIEW button (backlight on) to view the voltage and current set values.
Press SET VIEW button again (backlight off), the LCD redisplays the real-time sampling output voltage and current.
Buzzer On and Off
Press the BEEP button (backlight on), the buzzer will be on; long-press the BEEP button for 3s, the buzzer will be off. With the shutdown memory function, the last saved settings can be restored when the device is started up next time.
When the buzzer is enabled, it beeps for example:
- Power on/off
- CH1/CH2 setting switching
- Independent – series – parallel switching
- Output on/off
- OVP/OCP setup and on/off
- Pressing the voltage/current knob
- SET VIEW (setting/output) display switching
- LOCK/UNLOCK operation
- Panel lock/unlock
- CH3 output selection
Buttons Lock
Short press the LOCK button, the button backlight is on and the buttons on panel are locked.
Long press the LOCK button (>3s), the button light is off and the buttons on panel are unlocked.
Limited Warranty and Liability
UNI-T guarantees that the Instrument product is free from any defect in material and workmanship within three years from the purchase date. This warranty does not apply to damages caused by accident, negligence, misuse, modification, contamination, or improper handling. If you need a warranty service within the warranty period, please contact your seller directly. UNI-T will not be responsible for any special, indirect, incidental, or subsequent damage or loss caused by using this device. For the probes and accessories, the warranty period is one year. Visit instrument.uni-trend.com for full warranty information.
Learn more at: www.uni-trend.com
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UNI-T products are protected under patent laws in China and internationally, covering both granted and pending patents. Licensed software products are the property of UNI-Trend and its subsidiaries or suppliers, all rights reserved. This manual contains information that replaces all earlier published versions. The product information in this document is subject to update without notice. For more information on UNI-T Test & Measure Instrument products, applications, or services, please contact UNI-T Instrument for support. The support center is available on www.uni-trend.com ->instruments.uni-trend.com
Headquarter
- UNI-TREND TECHNOLOGY (CHINA) CO., Ltd.
- Address: No.6, Industrial North 1st Road, Songshan Lake Park, Dongguan City, Guangdong Province, China
- Tel: (86-769) 8572 3888
Europe
- UNI-TREND TECHNOLOGY EU GmbH
- Address: Affinger Str. 12
- 86167 Augsburg Germany
- Tel: +49 (0)821 8879980
North America
- UNI-TREND TECHNOLOGY US INC.
- Address: 3171 Mercer Ave STE 104, Bellingham, WA 98225
- Tel: +1-888-668-8648
FAQ
- Q: How can I reset the setup storage settings M1-M5?
- A: To reset the setup storage settings, press and hold the corresponding setup storage button for a few seconds until the values reset.
- Q: Can I use all three output channels simultaneously?
- A: Yes, you can use all three output channels simultaneously within their specified voltage and current ratings.
Documents / Resources
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UNI-T UDP3303C-U Linear DC Power Supply [pdf] User Manual UDP3303C-U Linear DC Power Supply, UDP3303C-U, Linear DC Power Supply, DC Power Supply, Power Supply, Supply |