NANKADF GA305H Series Lab DC Power Supply User Manual

1. Introduction

The NANKADF GA305H series is a miniature switching DC power supply designed for precision and convenience in various electronic applications. It features encoder adjustment for precise control of output voltage and current, along with a high-precision digital display for real-time monitoring of voltage, current, and USB charging parameters. This manual provides essential information for the safe and effective operation of your device.

2. Product Features

• Compact Design: Small size, light weight (approx. 1.15kg / 2.54lb), and high power density for portability and efficient use of space.
• Automatic CV/CC Switching: Automatically switches between Constant Voltage (CV) and Constant Current (CC) modes.
• High-Precision Digital Display: LED display for voltage, current, and USB charging parameters with high accuracy.
• Adjustable Output: Continuously adjustable output voltage and current between 0 and nominal values, with fine and coarse regulating knobs.
• Encoder Adjustment: Encoder adjustment for precise setting of voltage and current values. Press the knob to switch digit selection, rotate to set the value.
• Multiple Protections: Equipped with Over Voltage Protection (OVP), Over Current Protection (OCP), and Over Temperature Protection (OTP).
• Intelligent Cooling: Temperature-controlled fan cooling system ensures low noise and extended lifespan. The fan activates only when the internal temperature exceeds 50°C.
• Dual Voltage Input: Supports AC 230V/115V ±10% input with a convenient selector switch.
• USB Fast Charging: Integrated USB-A fast charging interface with a dedicated display for charging voltage and current.
• Certifications: CE & FCC certified for safety and quality assurance.

3. Specifications

4. Package Contents

Please check the package contents upon receipt to ensure all items are present and undamaged:

• 1x NANKADF GA305H DC Power Supply
• 1x Power Cord (EU, US, UK, or AU type, depending on region)
• 1x Test Line (gift)
• 1x Instructions Manual

5. Safety Instructions

To ensure safe operation and prevent damage to the device or injury, please read and follow these safety guidelines:

• Input Voltage Selection: Before connecting the power supply, ensure the AC input voltage selector switch on the rear panel is set to the correct voltage (115V or 230V) for your region. Incorrect selection can cause severe damage.
• Environment: Operate the device in a dry, well-ventilated area within the specified working temperature (0℃ to 40℃) and humidity (<80%RH). Avoid direct sunlight, high temperatures, and high humidity.
• Ventilation: Do not block the ventilation openings on the sides and rear of the unit. The intelligent fan system requires clear airflow for proper cooling.
• Power Cord: Use only the provided power cord or a suitable replacement that meets local safety standards.
• Output Connections: Always connect the load to the output terminals (red for positive, black for negative) before powering on the unit. Ensure connections are secure.
• Protection Features: The power supply includes Over Voltage Protection (OVP), Over Current Protection (OCP), and Over Temperature Protection (OTP). While these protect the unit, always operate within safe limits.
• Servicing: Do not attempt to open or service the unit yourself. Refer all servicing to qualified personnel.

6. Setup

1. Unpack: Carefully remove the power supply and all accessories from the packaging. Inspect for any signs of damage.
2. Select Input Voltage: Locate the AC input voltage selector switch on the rear panel. Use a small tool (e.g., a screwdriver) to set it to either 115V or 230V, matching your local mains voltage.
3. Connect Power Cord: Plug the provided power cord into the electric socket on the rear panel, then connect the other end to a suitable AC outlet.
4. Connect Load: Connect your load to the output terminals on the front panel. The red terminal is positive (+), and the black terminal is negative (-). Ensure a secure connection.

7. Operating Instructions

1. Power On: Press the 'POWER' switch on the front panel to turn on the unit. The LED display will illuminate.
2. Adjust Voltage: Use the 'VOLTAGE' knob to set the desired output voltage. For coarse adjustment, rotate the knob. For fine adjustment, press the 'VOLTAGE' knob to select a digit on the display, then rotate to change its value.
3. Adjust Current: Use the 'CURRENT' knob to set the desired output current limit. Similar to voltage, rotate for coarse adjustment and press/rotate for fine adjustment.
4. Monitor Output: The LED display shows the real-time output voltage and current. The 'C.V' (Constant Voltage) and 'C.C' (Constant Current) indicators will light up to show the current operating mode.
5. USB Fast Charging: To use the USB fast charging port, connect your device to the USB-A port on the front panel. The display will show the USB charging voltage and current.
6. Power Off: Press the 'POWER' switch again to turn off the unit.

8. Maintenance

• Cleaning: Disconnect the power supply from the mains before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use abrasive cleaners or solvents.
• Fan Operation: The internal fan is intelligently temperature-controlled. It will only rotate when the internal temperature exceeds 50°C. If the temperature is below 50°C, the fan will not spin, which is normal and helps reduce noise and save energy. Ensure the fan vents are clear of obstructions.
• Fuse Replacement: If the unit fails to power on, check the fuse located in the fuse box on the rear panel (refer to Figure 4). Disconnect the power cord, open the fuse box, and replace the fuse with one of the same type and rating.

9. Troubleshooting

• No Power:
  • Check if the power cord is securely connected to both the unit and the AC outlet.
  • Verify the AC input voltage selector switch on the rear panel is set correctly (115V or 230V).
  • Check and replace the fuse if blown (refer to Maintenance section).
• No Output Voltage/Current:
  • Ensure the output terminals are correctly connected to the load.
  • Check if the voltage and current knobs are adjusted to non-zero values.
  • Verify that OVP, OCP, or OTP indicators are not active, which would shut down the output for protection.
• Fan Not Spinning:
  • This is normal if the internal temperature is below 50°C due to the intelligent temperature control. The fan will activate automatically when needed.

10. User Tips

No specific user tips were available from provided reviews or Q&A. Always ensure proper ventilation and check connections before operation. For precise adjustments, utilize the encoder functionality by pressing the voltage or current knob to select specific digits for fine-tuning.

11. Warranty and Support

The NANKADF GA305H DC Power Supply comes with a 12-month warranty policy from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accident, unauthorized modification, or improper installation.

For any questions, technical assistance, or warranty claims, please contact the seller or manufacturer. We aim to respond to all inquiries within 24 hours.