1. Introduction
This manual provides detailed instructions for the safe and efficient operation of your NANKADF 30V 5A Adjustable DC Power Supply. This device is a mini-type switching power supply designed for electronic product repair, laboratory research and development, teaching, and production line aging tests. Please read this manual thoroughly before use and retain it for future reference.
2. Product Overview
2.1 Key Features
- Encoder Adjustment: Precise voltage and current setting via a single encoder knob.
- High-Precision LED Display: 4-digit display for voltage, current, and power with 0.01V/0.001A resolution.
- Multi-Protection: Includes short-circuit protection, over-temperature protection, over-voltage protection (OVP), over-current protection (OCP), and low ripple.
- USB Fast Charging Ports: Integrated USB-A and Type-C ports (up to 18W) for charging external devices.
- Compact Design: Mini portable bench power supply with high-quality components.
2.2 Front Panel Components
Refer to the image below for a visual guide to the front panel components.
- Voltage Output Display: Shows the current output voltage.
- Current Output Display: Shows the current output current.
- Power Output Display: Shows the calculated output power.
- Type-C Fast Charging Indicator: Indicates activity on the Type-C charging port.
- USB Fast Charging Indicator: Indicates activity on the USB-A charging port.
- Voltage Stabilizing Indicator Light (C.V): Illuminates when the power supply is operating in constant voltage mode.
- Constant Current Indicator Light (C.C): Illuminates when the power supply is operating in constant current mode.
- Output Indicator Light (OUT): Indicates if the main output is active.
- Short Circuit Protection Indicator Light (OCP): Illuminates when Overcurrent Protection is triggered.
- Output Button (OUT): Toggles the main power output on or off.
- Voltage/Current Switching Key (V/A): Switches between voltage and current adjustment modes for the encoder knob.
- Voltage/Current Setting Knob: Used to adjust voltage and current values.
- OCP Short Circuit Protection Switch (OCP): Activates or deactivates the Overcurrent Protection function.
- Power Switch: Turns the unit on or off.
- Positive Polarity (Red) Terminal: Connects to the positive lead of the load.
- Ground Terminal (Green): Connects to the ground lead of the load or system.
- Negative Polarity (Black) Terminal: Connects to the negative lead of the load.
2.3 Rear Panel Components
- Cooling Fan: Provides active cooling for internal components.
- Power Input Interface: Connects the AC power cord.
- Fuse Box: Contains the main protective fuse.
3. Setup
Follow these steps to set up your NANKADF DC Power Supply:
- Unpacking: Carefully remove the power supply and all accessories from the packaging. Verify that all items listed in the 'Package Contents' section are present.
- Placement: Place the power supply on a stable, level surface with adequate ventilation. Ensure that the cooling fan at the rear is not obstructed.
- Power Connection: Connect the provided AC power cord to the power input interface on the rear panel of the power supply and then to a suitable AC power outlet.
- Initial Power On: Flip the power switch to the 'ON' position. The LED display should illuminate.
- Output Connection: Connect your load to the output terminals (red for positive, black for negative, green for ground) using appropriate test leads. Ensure connections are secure before activating the output.
4. Operating Instructions
4.1 Adjusting Voltage and Current
The NANKADF power supply uses an encoder knob for precise adjustments.
- Select Adjustment Mode: Press the V/A button to switch between voltage (V) and current (A) adjustment modes. The active adjustment parameter will be highlighted on the display.
- Select Digit: Press the Voltage/Current Setting Knob to move the cursor to the desired digit you wish to adjust (e.g., tens, units, tenths, hundredths).
- Adjust Value: Rotate the Voltage/Current Setting Knob clockwise to increase the value or counter-clockwise to decrease it.
- Confirm Setting: Once the desired voltage and current limits are set, you can proceed to activate the output.
4.2 Output Control
The main power output is controlled by the OUT button.
- Turn Output ON: Press the OUT button. The 'OUT' indicator light will illuminate, and power will be supplied to the output terminals.
- Turn Output OFF: Press the OUT button again. The 'OUT' indicator light will turn off, and power will be disconnected from the output terminals.
4.3 Overcurrent Protection (OCP)
The OCP function provides additional safety by automatically shutting off the output if the current exceeds a preset limit or if a short circuit occurs.
- Activate OCP: Press the OCP button. The 'OCP' indicator light will illuminate, indicating that the protection is active.
- Deactivate OCP: Press the OCP button again. The 'OCP' indicator light will turn off.
- OCP Trigger: If OCP is active and the current exceeds the set limit or a short circuit is detected, the power supply will automatically stop output and emit an alarm.
4.4 USB Fast Charging Ports
The power supply includes USB-A and Type-C ports for charging compatible devices.
- Connect your device to either the USB-A or Type-C port.
- The ports support various fast charging protocols up to 18W.
- These ports can be used simultaneously with the main DC output.
4.5 Mute Function
To silence the operational beeps:
- Long press the OUT button to toggle the mute function on or off. When muted, the device will not emit beeps during operation or adjustments.
5. Safety Information
Always observe the following safety precautions to prevent injury or damage to the device:
- Do not operate the power supply in wet or damp conditions.
- Ensure proper grounding to prevent electric shock.
- Do not open the casing of the power supply. Refer all servicing to qualified personnel.
- Avoid placing objects on top of the power supply that could obstruct ventilation.
- Always disconnect the power supply from the AC outlet before performing any maintenance or when not in use for extended periods.
- Verify that the input voltage matches the specifications of the power supply.
- Do not exceed the maximum rated output voltage or current.
6. Maintenance
To ensure the longevity and proper functioning of your NANKADF DC Power Supply:
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use abrasive cleaners or solvents.
- Ventilation: Regularly check that the cooling fan and ventilation openings are free from dust and obstructions.
- Fuse Replacement: If the power supply fails to turn on, check the fuse in the fuse box on the rear panel. Replace it with a fuse of the same type and rating if necessary.
- Storage: When not in use, store the power supply in a cool, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Power supply does not turn on. | No AC power; Blown fuse; Power switch off. | Check AC power connection; Replace fuse; Ensure power switch is ON. |
| No output voltage/current. | Output button OFF; OCP triggered; Incorrect settings. | Press OUT button to activate output; Check OCP status and reset if needed; Verify voltage/current settings. |
| OCP indicator is on, output off. | Overcurrent detected; Short circuit in load. | Reduce load current or fix short circuit; Press OCP button to reset. |
| Display shows incorrect values. | Measurement error; Internal fault. | Verify with an external multimeter; Contact support if discrepancy persists. |
8. Specifications
| Parameter | Value |
|---|---|
| Brand | NANKADF |
| Model Number | 30V 5A |
| Output Voltage | 0-30 V |
| Output Current | 0-5 A |
| Maximum Power | 150 Watt |
| Voltage Display Accuracy | 0.01 V |
| Current Display Accuracy | 0.001 A |
| Form Factor | Benchtop |
| Material | Aluminum |
| Color | Black |
| Item Weight | 1.45 Kilograms |
| Connector Type | USB-A, Type-C |
| USB Fast Charging Output | Up to 18W |
| Protection Features | Short-circuit, Over-temperature, Over-voltage (OVP), Over-current (OCP) |
9. Package Contents
The package includes the following items:
- 1 x NANKADF DC Power Supply Unit (30V 5A)
- 1 x AC Power Cord (UK plug)
- 1 x Output Test Leads
- 1 x User Manual (English)
10. Warranty and Support
NANKADF is committed to improving user experience and service. We provide after-sales services and technical consulting for this product. For any issues or inquiries, please contact NANKADF customer support.
