1. Introduction
This manual provides detailed instructions for the safe and efficient operation of your KUAIQU Lab DC Power Supply, SPPS-G series. This high-precision, low-ripple power supply is designed for various applications including laboratory work, electronic DIY, and repair tasks. Please read this manual thoroughly before use and keep it for future reference.
Figure 1: KUAIQU Lab DC Power Supply with highlighted features.
Video 1: Product overview and demonstration of the KUAIQU DC Power Supply.
2. Safety Information
- Always connect the power supply to a grounded outlet.
- Do not operate the device in wet or damp conditions.
- Ensure proper ventilation to prevent overheating.
- Do not open the casing; refer servicing to qualified personnel.
- Verify input voltage compatibility (AC 110V or AC 220V) before connecting to power.
- Avoid short circuits at the output terminals.
3. Product Overview and Components
The KUAIQU Lab DC Power Supply features a compact design with intuitive controls and a clear digital display. Key components are:
Figure 2: Front and Rear Panel Components.
- Display Screen: Shows Voltage (V), Current (A), and Power (W) with 4-digit precision.
- Adjustment Knobs: Separate knobs for precise adjustment of Current and Voltage.
- Protection Buttons: OCP (Overcurrent Protection) and OVP (Overvoltage Protection) buttons for safety features.
- Output Button: Controls the output power to prevent unexpected damage.
- USB Output: A 5V/2A USB port for charging external devices.
- Output Terminals: Negative (-), Ground (GND), and Positive (+) terminals for connecting loads.
- Power Button: On/Off switch for the unit.
- Fuse Box: Located at the rear for easy fuse replacement.
4. Setup
- Choose the Correct Power Plug: The power supply supports AC 110V and AC 220V input. Ensure you use the appropriate power cable for your region. The package includes a power cable suitable for your delivery address.
- Connect Power Cable: Plug the provided power cable into the AC input socket on the rear of the power supply and then into a grounded wall outlet.
- Connect Output Lines: Connect your load to the output terminals using the provided output lines. Ensure correct polarity: red to positive (+), black to negative (-), and green to ground (GND) if required.
Figure 3: Available Power Plug Types.
Figure 4: Power Supply with connected cables.
5. Operating Instructions
- Power On: Press the POWER button on the front panel. The 4-digit display will light up, showing initial voltage, current, and power readings.
- Adjust Voltage and Current:
- Rotate the VOLTAGE knob to adjust the output voltage.
- Rotate the CURRENT knob to adjust the output current.
- The encoder knobs allow for precise adjustment. Press the knob to switch between digits (0-9) for fine-tuning. A buzzer provides audible feedback for adjustments (can be muted).
Figure 5: High Precision Encoder Adjustment Knob.
- Activate Output: After setting the desired voltage and current, press the OUTPUT button to enable power output to your connected load. This helps prevent unexpected damage to loads due to voltage and current changes.
- Use OCP/OVP Functions:
- Press the OCP (Overcurrent Protection) button to activate overcurrent protection. If the power supply detects an overcurrent condition, the output will stop, and "OCP" will flash on the screen.
- Press the OVP (Overvoltage Protection) button to activate overvoltage protection. If the power supply detects an overvoltage condition, the output will stop, and "OVP" will flash on the screen.
- These functions help protect both the power supply and your connected devices from damage.
Figure 7: OCP/OVP Short Circuit Alarm.
- USB Fast Charging: The front panel includes a 5V/2A USB port for convenient charging of compatible devices.
Figure 6: Output Button Function.
Figure 8: USB Fast Charging Port.
6. Specifications
The KUAIQU SPPS-G series offers various models with different voltage and current capabilities. Below is a detailed specification table:
Figure 9: SPPS-G Series Detailed Specifications.
General Parameters:
- Input Voltage: AC 110V/220V (selectable) 50/60Hz
- Output Voltage: 0 ~ 30V / 60V / 120V (depending on model)
- Output Current: 0 ~ 10A / 5A / 3A (depending on model)
- Voltage Resolution: 100mV
- Current Resolution: 10mA
- Voltage Regulation: Line regulation <5mV, Load regulation <5mV
- Current Regulation: Line regulation <3mA, Load regulation <3mA
- Recovery Time: <500us (50% Load change, minimum load 0.5A)
- Ripple & Noise: <5m Vrms, 100m Vp-p
- Temperature Coefficient: <100ppm/C
- Display Precision:
- Voltage: +-(0.5% of rdg + 3 digits)
- Current: +-(0.5% of rdg + 3 digits)
- Operation Temperature & Humidity: 0 ~ 40°C, RH<80%
- Storage Temperature & Humidity: -10 ~ 70°C, RH<70%
- Dimensions (approx.): 21cm (8.3in) L x 17cm (6.7in) W x 7.9cm (3.1in) H
- Weight (approx.): ≤2.8lb (1.27kg)
Figure 10: Portable and Lightweight Design.
7. 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 ventilation openings on the sides and rear of the unit are clear of obstructions to allow for proper heat dissipation by the temperature-controlled fan.
- Fuse Replacement: If the unit does not power on, check the fuse located in the fuse box at the rear. Replace with a fuse of the same type and rating (e.g., 5x20mm 3.15A for SPPS-G3010 model).
- Storage: When not in use for extended periods, store the power supply in a cool, dry place away from direct sunlight and extreme temperatures.
8. Troubleshooting
- No Power:
- Check if the power cable is securely connected to both the unit and the wall outlet.
- Verify that the wall outlet has power.
- Check and replace the fuse if necessary (refer to Maintenance section).
- No Output Power:
- Ensure the OUTPUT button is pressed and the output is enabled.
- Check if OCP or OVP is active (flashing on display). If so, resolve the overcurrent/overvoltage condition and reset the unit.
- Verify that the load is correctly connected and not short-circuited.
- Inaccurate Readings:
- Ensure proper connections to the load.
- Compare readings with a calibrated multimeter for verification. The unit provides highly accurate output with 0.01V voltage and 0.001A current precision.
Figure 11: Highly Accurate Output.
- Buzzer Alarm: The buzzer indicates precise adjustments or protection activation. If it sounds unexpectedly, check for OCP/OVP conditions.
9. Application Areas
The KUAIQU Lab DC Power Supply is versatile and suitable for a wide range of applications, including but not limited to:
- Laboratory research and development
- Battery charging
- Electronic DIY projects
- Mobile phone repair
- Laptop repair
- Computer maintenance
- Various types of home appliance maintenance
- LED lights power-on testing
- On-board electrical testing
- DC motor aging tests
- Circuit board repair
Figure 12: Diverse Application Areas.
10. Warranty & Support
Our store provides a free replacement for orders within 30 days from the delivery date. For orders between 1 to 12 months, a partial payment of the order value may be required for replacement. For orders older than 12 months, small discounts may be offered for replacements.
For any problems or inquiries, please contact our customer support. We aim to respond within 30 minutes during working hours and resolve issues within 24 hours.
Working Hours: Monday to Friday, 9:00 AM to 6:30 PM Beijing Time.
All orders and support requests will not be processed during weekends and holidays.
