Introduction
This manual provides detailed instructions for the safe and efficient operation of your KUAIQU SPS-C Series DC Power Supply. Please read this manual thoroughly before use and keep it for future reference.
Safety Precautions
To ensure safe operation and prolong the life of the device, please observe the following precautions:
- Always connect the power supply to a grounded outlet.
- Do not operate the device in wet or damp conditions.
- Ensure proper ventilation; the cooling fan activates when the internal temperature exceeds 50°C (122°F).
- Do not exceed the rated output voltage or current.
- Utilize the Over Voltage Protection (OVP) and Over Current Protection (OCP) features to safeguard connected devices.
- Disconnect power before making any connections or adjustments.
Product Features
- Complete Operating Protection: Includes OCP (Over Current Protection) and OVP (Over Voltage Protection).
- High Efficiency & Low Ripple: Designed for stable and clean power output.
- Dual Display: Clear 4-digit LED display for voltage, current, and power.
- Voltage Stabilization & Current Limiting: Ensures stable output under varying loads.
- Dual Voltage Input: Supports AC 110V 60Hz or 220V 50Hz.
- Temperature Control Fan: Intelligent cooling fan for heat dissipation and low noise.
- Encoder Adjustment: Digital signal for precise voltage and current adjustment.
- USB & Type-C Fast Charging: Integrated ports for quick charging of external devices.
- Output ON/OFF Switch: Allows for safe adjustment of settings before applying power to the load.
Setup Instructions
- Unpacking: Carefully remove the DC Power Supply and all accessories from the packaging. Verify that all components are present: 1x DC Power Supply, 1x Power Cable, 1x Output Line, 1x Instruction Book.
- Power Connection:
- Ensure the power switch on the rear panel is in the OFF position.
- Connect the provided power cable to the AC input socket on the rear panel of the power supply.
- Plug the other end of the power cable into a suitable AC outlet (AC 110V 60Hz or 220V 50Hz, depending on your model and region).
- Verify the correct plug type for your region.
- Output Connections:
- Connect the red output line to the positive (+) terminal and the black output line to the negative (-) terminal of the power supply.
- Connect the other ends of the output lines to your load device, ensuring correct polarity.
- For safety, ensure the output switch is OFF before connecting the load.
Operating Instructions
- Power On: Flip the power switch on the rear panel to the ON position. The display will illuminate.
- Setting Voltage and Current:
- Use the V-COARSE and V-FINE encoder knobs to adjust the desired output voltage.
- Use the A-COARSE and A-FINE encoder knobs to set the desired current limit.
- The 4-digit LED display will show the set voltage, current, and calculated power.
Detailed diagram of the front panel, labeling the Voltage Display, Current Display, Power Display, USB-A and USB-C ports, Power button, Output Negative (-), GND, Output Positive (+), V-Coarse, V-Fine, A-Coarse, A-Fine knobs, and OCP, OVP, Output buttons. 
Illustration of the new encoder adjustment feature, allowing for direct and precise setting of voltage values using coarse and fine adjustments. - Activating Output:
- After setting the desired voltage and current, press the ON/OFF button (labeled "OUTPUT" on some models) to enable the power output. The status light will turn on.
- The power supply will now deliver power to the connected load.
Step-by-step guide on using the ON/OFF button: 1) Set current/voltage, 2) Press ON/OFF (status light will be on), 3) Start to work. - OCP (Over Current Protection) and OVP (Over Voltage Protection):
- These features protect your connected devices from damage due to excessive current or voltage.
- Press the OCP or OVP buttons to activate these protections. When triggered, an alarm will sound, and the output will stop.
The OCP, OVP, and OUTPUT buttons are shown illuminated, indicating their active status. - USB and Type-C Quick Charging:
- The front panel includes USB-A and USB-C ports for quick charging of cell phones and other electronic devices.
- These ports support various fast charging protocols.
Demonstration of the USB-A and USB-C quick charging ports being used to charge a mobile phone and a tablet simultaneously. - Switching CC and CV Modes:
Video demonstrating how the DC power supply automatically switches between Constant Current (CC) and Constant Voltage (CV) modes based on the load and set current limit. If the power supply current is less than the load current, it operates in CC mode. If the power supply current is set higher than the load current, it operates in CV mode.
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 rear panel are clear of obstructions to allow for proper airflow. The intelligent cooling fan will activate automatically when the internal temperature exceeds 50°C (122°F).
- Fuse Replacement: The device is equipped with a fuse for voltage overload protection. If the device fails to power on, check and replace the fuse located in the fuse box on the rear panel. Always replace with a fuse of the same rating.
- Storage: Store the power supply in a cool, dry environment, away from direct sunlight and extreme temperatures.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/Display off | Power cable not connected, power switch off, blown fuse. | Check power cable connection, ensure power switch is ON, check and replace fuse if necessary. |
| No output voltage/current | Output switch OFF, OCP/OVP activated, incorrect settings. | Press the OUTPUT button to turn on output, check OCP/OVP status and reset if triggered, verify voltage/current settings. |
| Output voltage/current unstable | Loose connections, faulty load, internal fault. | Check all connections, test with a different load, contact support if problem persists. |
| Overheating | Blocked ventilation, prolonged high load. | Ensure ventilation openings are clear, reduce load if operating continuously at maximum capacity. |
Specifications
The SPS-C Series DC Power Supply offers various models with different output capabilities. Below are general specifications and a detailed table for specific models.
- Input Voltage: AC 110V 60Hz or 220V 50Hz
- Voltage Resolution: 10mV
- Current Resolution: 1mA
- Voltage Regulation: Line regulation <5mV, Load regulation <5mV
- Recovery Time: <500µs (50% Load change, minimum load 0.5A)
- Ripple & Noise: <5m Vrms, 100m Vp-p
- Temperature Coefficient: <100ppm/C
- Current Regulation: Line regulation <3mA, Load regulation <3mA
- Voltage Display Precision: ±(0.5% of rdg + 2 digits)
- Current Display Precision: ±(0.5% of rdg + 2 digits)
- Operation Temperature & Humidity: 0 ~ 40°C, RH<80%
- Storage Temperature & Humidity: -10 ~ 70°C, RH<70%
- USB Output: 5V/2A
- Dimensions (Single Unit): Approximately 22 x 8.5 x 15.5 cm (8.7 x 3.3 x 6.1 inches)
- Net Weight (Single Unit): Approximately 1.2 kg (2.6 lbs)
User Tips
- For precise adjustments, use the fine adjustment knobs (V-FINE, A-FINE) after setting the approximate value with the coarse knobs (V-COARSE, A-COARSE).
- Always set the current limit slightly above the expected operating current of your load to allow for normal operation while still providing overcurrent protection.
- When working with sensitive electronics, it's good practice to set the voltage and current limits before connecting the load and enabling the output.
- The integrated USB and Type-C ports are convenient for charging small devices or powering USB-powered tools during your projects.
Warranty and Support
The product comes with a 12-month warranty policy. For any questions or issues regarding your KUAIQU DC Power Supply, please contact customer support. They aim to respond within 24 hours.
The store provides free replacement for orders within 30 days from the delivery date. For orders from 1 to 12 months, a partial payment may be required for replacement. For orders older than 12 months, small discounts may be offered.
