1. Introduction
The Jesverty Adjustable DC Power Supply is a professional laboratory power supply designed for various applications including laboratories, educational sites, factory manufacturing tests, maintenance repairs, battery charging, anodizing, and electronic DIY projects. It features precise voltage and current control, dual USB-A and USB-C fast charging ports, intelligent battery charging with reverse connection protection, and multiple safety features.
Image: Jesverty Adjustable DC Power Supply with its main features and accessories.
2. Package Contents
Please check the package contents upon receipt to ensure all items are present and undamaged:
- 1 x SPS-C Series DC Power Supply Unit
- 1 x Power Cord (AC input settings may vary by destination)
- 1 set of Test Leads (Note: For long-term high current use, prepare test leads with sufficient current capacity)
- 1 x Instruction Manual
Image: Included product accessories: output line and power cable.
3. Product Overview
Familiarize yourself with the components of your Jesverty DC Power Supply:
Image: Detailed diagram of the power supply's front and rear panels with numbered components.
- Voltage Display
- C.C. Mode Indicator (Constant Current)
- CHG Mode Indicator (Charging)
- C.V. Mode Indicator (Constant Voltage)
- Current Display
- OCP Status LED (Over-Current Protection)
- OPN Status LED (Output ON)
- Power Display
- USB-C Quick-Charge Port
- USB-A Quick-Charge Port
- CHG Setting Button (Intelligent Battery Charging)
- OCP Setting Button (Over-Current Protection)
- Output Control Button (OUT)
- Voltage Knob (Coarse Adjustment)
- Voltage Knob (Fine Adjustment)
- Current Knob (Coarse Adjustment)
- Current Knob (Fine Adjustment)
- Power Switch
- Output Terminal - (Black)
- Grounding Terminal (Green)
- Output Terminal + (Red)
- Cooling Fan
- Input Selectable Switch (AC115V/230V)
- AC Power Inlet
- Fuse Box (Spare Fuse Inside)
4. Setup
4.1 AC Input Voltage Selection
Before connecting the power supply to the mains, ensure the Input Selectable Switch (23) on the rear panel is set to match your local AC voltage (115V or 230V). Incorrect selection can damage the unit.
4.2 Connecting Power
Connect the provided power cord to the AC Power Inlet (24) on the rear panel and then to a suitable wall outlet.
4.3 Connecting the Load
Connect your device or circuit to the output terminals on the front panel:
- Connect the negative lead of your load to the Output Terminal - (Black) (19).
- Connect the positive lead of your load to the Output Terminal + (Red) (21).
- The Grounding Terminal (Green) (20) is for safety grounding.
5. Operating Instructions
5.1 Power On/Off
Press the green Power Switch (18) lightly to turn the unit ON or OFF.
5.2 Voltage Adjustment
Rotate the V-COARSE knob (14) to adjust the value of the first two digits of the voltage. Rotate the V-FINE knob (15) to adjust the value of the last two digits (after the decimal point) for fine-tuning.
5.3 Current Adjustment
Rotate the A-COARSE knob (16) to adjust the value of the first two digits of the current. Rotate the A-FINE knob (17) to adjust the value of the last two digits (after the decimal point) for fine-tuning.
5.4 Output Control
Press the OUT button (13) lightly to turn the output ON or OFF. When the output is OFF, the display will show "OFF".
5.5 OCP (Over-Current Protection) Setting
- Press the OCP Setting Button (12) lightly to enter the OCP setting interface.
- Rotate the V-COARSE knob (14) to change the setting from "0" (disabled) to "1" (enabled). The OCP Status LED (6) will turn on when enabled.
- Press the OCP button again to return to the main interface.
5.6 OPN (Output Status Setting)
The OPN function allows the unit to output voltage and current as soon as you turn the power switch on, without needing to press the "OUT" button. Refer to the OPN Status LED (7) for its status.
5.7 USB Charging Function
The power supply features USB-A (10) and USB-C (9) quick-charge ports, both supporting 20W fast charging. These can be used to charge smartphones or power small electronic modules.
5.8 Intelligent Battery Charging
- Connect the battery to the output terminals, ensuring correct polarity.
- Press the gray CHG Setting Button (11) lightly to enable the intelligent battery charging function. The CHG Mode Indicator (3) will turn on.
- The Power Display (8) will show the energy charged in Ampere-hours (Ah).
- The power supply will automatically stop charging when the battery is full.
- Built-in reverse connection protection will display "EER" if the battery is connected with reverse polarity. Correct the wiring to proceed.
Video: Demonstration of key operating functions including power, voltage/current adjustment, output control, OCP, USB charging, and intelligent battery charging with reverse polarity protection.
6. Specifications
| Feature | Description |
|---|---|
| Brand | Jesverty |
| Model Series | SPS-C (SPS-3010C, SPS-6005C, SPS-12003C) |
| Input Voltage | AC115V/230V (Selectable) |
| Max Output (SPS-3010C) | 30V, 10A, 300W |
| Display | 4-Digit LED |
| Voltage Setting Resolution | 0.01V |
| Current Setting Resolution | 0.001A |
| Power Setting Resolution | 0.1W |
| USB Output | USB-A & USB-C, 20W Quick-Charge (5V 2A) |
| Protection Features | OCP (Over-Current Protection), Overload Protection, Short Circuit Alarm, Reverse Connection Protection (for battery charging) |
| Cooling | Temperature-regulated Cooling Fan |
| Dimensions (approx.) | 7.1(D) x 3.6(W) x 6.2(H) inches (18cm x 9cm x 16cm) |
| Weight (approx.) | 2.5 lbs (1.14 kg) |
| Certification | CE |
7. Troubleshooting
| Issue | Possible Cause / Solution |
|---|---|
| Display shows "EER" during battery charging | Reverse connection protection is enabled. Disconnect the battery and reconnect with correct polarity. |
| CHG indicator light flashes continuously | Cables may be disconnected during charging, or the charging function is abnormal. Press the CHG button lightly to turn off the intelligent charging function, press it again to reset, and then reconnect the power cord to continue charging. |
| CHG indicator light flashes (after charging) | This indicates that the battery is fully charged. |
| Display shows "EER" briefly on power-up | The output terminal may still be discharging residual electricity from the last use. This is normal and should clear quickly. |
| No output when OUT button is pressed | Check if OCP is enabled and triggered, or if the current/voltage limits are set too low for the load. Ensure the power supply is properly connected to the mains. |
8. Maintenance
- Keep the power supply clean and dry. Avoid exposure to dust, moisture, and corrosive substances.
- Ensure adequate ventilation around the unit, especially for the Cooling Fan (22), to prevent overheating.
- Do not operate the unit in environments with extreme temperatures or high humidity.
- Do not attempt to disassemble or modify the power supply. Refer all servicing to qualified personnel.
- Always use appropriate test leads with sufficient current capacity for your applications to prevent damage or inaccurate readings.
9. User Tips
- Utilize the coarse and fine encoder knobs for precise voltage and current adjustments. The coarse knob is ideal for setting the integer part, while the fine knob allows for accurate adjustment of the decimal values.
- When using the intelligent battery charging function, always double-check the battery polarity before connecting to avoid triggering the reverse connection protection.
- For projects requiring sustained high current, consider investing in higher-quality test leads than the included ones, as the provided leads are primarily for general use.
- Take advantage of the dual USB-A and USB-C ports for convenient fast charging of your mobile devices or powering small development boards directly from the power supply.
10. Warranty and Support
Jesverty provides professional technical support for this product. Should you encounter any problems or have questions regarding your unit, please feel free to contact Jesverty Customer Service via the platform's messaging system or the email address provided on the back of your instruction manual.
