Kungber DC Power Supply Variable 120V 3A (Model SPS1203C) Instruction Manual

1. Introduction

This manual provides essential information for the safe and effective operation of your Kungber DC Power Supply Variable 120V 3A (Model SPS1203C). This adjustable switching regulated DC bench power supply is designed for various applications including laboratory work, school projects, repairs, electroplating, and battery charging. Please read this manual thoroughly before use and retain it for future reference.

2. Safety Instructions

To ensure safe operation and prevent damage, observe the following precautions:

• Always connect the grounding wire to a proper earth ground.
• Ensure the input voltage switch on the rear panel is set correctly for your local power supply (115V or 230V) before connecting to AC power.
• Do not operate the device in a humid or dusty environment.
• Avoid blocking the ventilation openings to prevent overheating. The intelligent thermal protection activates the cooling fan when the operating temperature exceeds 122°F/50°C.
• Do not attempt to repair or modify the unit yourself. Refer all servicing to qualified personnel.
• Utilize the Overcurrent Protection (OCP) feature to safeguard connected devices from short circuits and overcurrents.
• When charging batteries, ensure correct polarity to avoid damage. The intelligent charging mode includes built-in detection of incorrect connections.

3. Package Contents

The following items are included in your package:

• 1 x Kungber Variable DC Power Supply (Model SPS1203C)
• 1 set of Output Power Cords (with alligator clips)
• 1 x Input Power Cord
• 1 x User Manual

4. Product Overview

4.1 Front Panel

The front panel features a clear 4-digit LED display for voltage, current, and wattage readings, along with various control knobs and buttons.

• Digital Display: Shows real-time Voltage (V), Current (A), and Power (W/Ah).
• V-COARSE / V-FINE Knobs: For coarse and fine adjustment of output voltage.
• A-COARSE / A-FINE Knobs: For coarse and fine adjustment of output current.
• OCP Button: Activates/deactivates Overcurrent Protection.
• BATTERY Button: Engages intelligent charging mode.
• OUTPUT Button: Toggles power output to the terminals.
• USB-A & USB-C Ports: 18W fast charging outputs for external devices.
• Output Terminals: Positive (+), Negative (-), and Ground (GND) connections for DC output.

4.2 Rear Panel

The rear panel includes the AC power input, voltage selection switch, and cooling fan.

• AC Power Input: Connects to the provided input power cord.
• Voltage Selection Switch: Allows selection between 115V and 230V AC input.
• Cooling Fan: Automatically activates to dissipate heat when internal temperature rises.

5. Setup

1. Check Voltage Selection: Before plugging in the power supply, verify that the voltage selection switch on the rear panel is set to match your local AC power supply (115V or 230V).
2. Connect Power Cord: Plug the provided input power cord into the AC Power Input on the rear panel and then into a grounded AC outlet.
3. Connect Output Cables: Connect the output power cords to the Positive (+), Negative (-), and optionally Ground (GND) terminals on the front panel. Ensure secure connections.
4. Power On: Press the POWER button on the front panel to turn on the device. The display will illuminate.

6. Operating Instructions

6.1 Basic Voltage and Current Adjustment

Use the COARSE and FINE adjustment knobs to set the desired voltage and current limits. The 4-digit LED display provides high accuracy with a resolution of 0.01V and 0.01A.

• Voltage Adjustment: Rotate the V-COARSE knob for large voltage changes and the V-FINE knob for precise adjustments.
• Current Adjustment: Rotate the A-COARSE knob for large current changes and the A-FINE knob for precise adjustments.
• Output Activation: After setting the desired values, press the OUTPUT button to enable power delivery to the terminals.

6.2 Intelligent Charging Mode

The intelligent charging mode is designed for battery charging applications, providing real-time charging power (Ah) display and automatic shutdown when the battery is full.

• Activate Charging Mode: Press the BATTERY button to engage the intelligent charging mode.
• Real-time Display: The display will show the accumulated charging power in Amp-hours (Ah).
• Automatic Shutdown: The power supply will automatically stop charging when the connected battery reaches full capacity.
• Incorrect Connection Detection: Built-in safety features detect and alert users to incorrect battery connections.

6.3 Overcurrent Protection (OCP)

The OCP feature protects your connected devices from damage due to short circuits or excessive current draw.

• Activate OCP: Press the OCP button to enable overcurrent protection.
• Alarm Trigger: If a short circuit or overcurrent condition occurs, the device will trigger an alarm and automatically stop output to protect the load.

6.4 USB Fast Charging Ports

The integrated USB-A and USB-C ports provide 18W high-speed output for efficient charging of compatible devices.

6.5 Official Product Video: Introduction to Kungber DC Power Supply

7. Applications

The compact and versatile design of the Kungber DC Power Supply makes it suitable for a wide range of applications:

• Laboratory and educational settings
• Electronic repair and maintenance
• Electrolysis and electroplating
• Lamp testing and aging tests
• Battery charging (with intelligent mode)
• Home DIY projects

8. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the power supply. Do not use abrasive cleaners or solvents.
• Ventilation: Ensure the cooling fan and ventilation openings are free from dust and obstructions to maintain optimal performance and prevent overheating.
• Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures when not in use.

9. Troubleshooting

If you encounter issues with your power supply, refer to the following common troubleshooting steps:

• No Power: Check if the input power cord is securely connected and the rear panel voltage selection switch is correctly set. Ensure the power outlet is functional.
• No Output: Verify that the OUTPUT button has been pressed to enable power delivery. Check if OCP is active and has been triggered (indicated by an alarm or flashing OCP light).
• OCP Triggered: If OCP activates frequently, check for short circuits or excessive current draw in your connected load. Reduce the current limit or inspect your circuit.
• Overheating: Ensure the ventilation openings are clear. If the fan is not running when the unit is warm, contact support.
• Inaccurate Readings: While the device offers high precision, for critical applications, verify readings with a calibrated multimeter.

10. Specifications

11. Warranty & Support

Kungber provides technical support for this product. The product is backed by a lifetime warranty, ensuring long-term reliability and customer satisfaction. For assistance, please refer to the contact information provided with your purchase or visit the official Kungber website.