Jesverty SPS-12003H DC Variable Power Supply User Manual

1. Introduction

The Jesverty SPS-12003H is a high-precision DC variable power supply designed for various applications including laboratory work, school projects, maintenance, electrolysis, electroplating, brush plating, lamp testing, aging testing, and battery charging. This manual provides detailed instructions for the safe and efficient operation of your device.

Key Features:

• High-precision encoder knobs for precise voltage and current adjustment (up to 0.01V and 0.001A).
• 4-digit backlit LED display for clear readings in various lighting conditions.
• Integrated 5V/2A USB port with fast charging protocol recognition chip for charging mobile phones and other devices.
• Output enable/disable button to prevent accidental load damage.
• Multiple safety protections: grounding wire, leakage protection, thermal protection, over-voltage protection, over-current protection, and short-circuit protection.
• Intelligent temperature-controlled fan for efficient heat dissipation and extended product lifespan.
• Compact and lightweight design (18 x 8.5 x 15.5 cm, 1.1 kg) for space-saving on the workbench.

2. Safety Information

Please read all safety warnings and instructions carefully before operating the device to ensure safe and proper use. Keep this manual for future reference.

General Safety Precautions:

• Always connect the power supply to a grounded outlet.
• Do not operate the device in wet or damp conditions.
• Ensure proper ventilation around the unit to prevent overheating. Do not block ventilation openings.
• Do not open the casing; there are no user-serviceable parts inside. Refer all servicing to qualified personnel.
• Disconnect power before making any connections or disconnections to the output terminals.
• Verify the input voltage matches your local power supply (AC220V 50Hz for EU plug model).
• Avoid short-circuiting the output terminals for extended periods.

Built-in Safety Features:

• Grounding Wire: Provides essential protection against electrical shock.
• Leakage Protection: Safeguards against current leakage.
• Thermal Protection: Automatically shuts down the unit if internal temperature exceeds safe limits.
• Over-Voltage Protection (OVP): Protects connected loads from excessive voltage.
• Over-Current Protection (OCP): Prevents damage due to excessive current draw.
• Short-Circuit Protection: Safeguards the unit and load in case of a short circuit.
• Intelligent Temperature Control Fan: Activates and adjusts speed based on internal temperature, ensuring optimal cooling and extending product life.

Image: Overview of the Jesverty SPS-12003H highlighting its safety features including short-circuit protection, overload protection, overheat protection, and grounding terminal. Also shown are various international plug types and the intelligent cooling fan.

3. Package Contents

Please check the package contents upon receipt. If any items are missing or damaged, contact your vendor immediately.

• Jesverty SPS-12003H DC Variable Power Supply Unit
• Power Cord (EU plug for this model)
• Output Test Leads (typically alligator clips to banana plugs)
• User Manual (this document)

4. Product Overview

Familiarize yourself with the components and controls of your Jesverty SPS-12003H power supply.

Image: Front panel of the Jesverty SPS-12003H showing the display, control knobs, USB port, and output terminals.

Front Panel Components:

• LED Display: 4-digit display showing Voltage (V), Current (A), and Power (W). Includes indicators for OVP, OCP, OPN, RMT, CV, CC.
• CURRENT Knob: Encoder knob for adjusting output current. Press to select digit for adjustment.
• VOLTAGE Knob: Encoder knob for adjusting output voltage. Press to select digit for adjustment.
• 5V/2A USB Port: Standard USB-A port for charging external devices.
• POWER Button: Main power switch for the unit.
• OUTPUT Button: Toggles the power output ON/OFF. Long press for advanced settings (OPN, OCP).
• Output Terminals:
  • GND (Green): Ground terminal.
  • - (Black): Negative output terminal.
  • + (Red): Positive output terminal.

Rear Panel Components:

• AC Power Input: Connector for the power cord.
• Cooling Fan: Intelligent temperature-controlled fan for heat dissipation.

5. Setup

Follow these steps for initial setup of your power supply.

1. Placement: Place the power supply on a stable, flat surface with adequate ventilation. Ensure the cooling fan at the rear is not obstructed.
2. Power Connection:
   • Ensure the power supply's main power button is in the OFF position.
   • Connect the provided power cord to the AC power input on the rear panel of the unit.
   • Plug the other end of the power cord into a grounded AC outlet (AC220V 50Hz for EU plug model).
3. Output Lead Connection:
   • Connect the test leads to the output terminals: Red to '+', Black to '-', and Green to 'GND' if grounding is required for your application.
   • Ensure connections are secure before applying power to your load.

6. Operating Instructions

This section details the operation of the Jesverty SPS-12003H.

6.1 Powering On/Off

• To power on the unit, press the green POWER button. The display will illuminate.
• To power off the unit, press the green POWER button again.

6.2 Adjusting Voltage and Current

The SPS-12003H uses precise encoder knobs for setting voltage and current values.

Image: Detailed view of the encoder knobs for current and voltage adjustment, emphasizing their precision.

1. Selecting a Digit: Press the VOLTAGE knob or CURRENT knob momentarily. The digit that can be adjusted will start blinking. Press the knob repeatedly to cycle through the digits (e.g., hundreds, tens, units, tenths, hundredths).
2. Adjusting Value: Once a digit is blinking, rotate the knob clockwise to increase the value or counter-clockwise to decrease it. The selected digit will blink for approximately 3 seconds after selection or change.
3. Precision: The encoder knobs allow for fine adjustments, with voltage precision up to 0.01V and current precision up to 0.001A.

Image: Visual guide demonstrating how to adjust voltage and current by pressing the knob to select a digit and then rotating to change its value.

6.3 Output Enable/Disable Button

The OUTPUT button controls the power output to your connected load, preventing accidental damage.

Image: Close-up of the output enable/disable button, indicating its function to prevent load damage.

• Press the OUTPUT button momentarily to toggle the power output ON or OFF.
• When the output is OFF, you can safely adjust voltage and current settings without affecting the connected load.

6.4 USB Charging Function

The integrated 5V/2A USB port allows for convenient charging of compatible devices.

Image: The 5V/2A USB port on the front panel, shown charging a mobile phone, demonstrating its fast charging capability.

• Simply connect your USB-compatible device to the 5V/2A USB port on the front panel.
• This port provides a fixed 5V output at up to 2A and supports fast charging protocols.

6.5 Screen Brightness Adjustment

You can adjust the brightness of the LED display for optimal visibility.

Image: Instructions for adjusting screen brightness by simultaneously rotating the CURRENT and VOLTAGE knobs. Rotating right increases brightness, rotating left decreases it.

• To increase brightness, simultaneously rotate both the CURRENT and VOLTAGE knobs clockwise.
• To decrease brightness, simultaneously rotate both the CURRENT and VOLTAGE knobs counter-clockwise.

6.6 Over Current Protection (OCP) Setting

OCP provides an additional layer of protection by setting a maximum current threshold independent of the normal current limit.

Image: Visual guide for enabling and disabling Over Current Protection (OCP) and setting its value using the CURRENT knob.

1. Entering OCP Setting: Press and hold the CURRENT button for 3 seconds. The display will show the OCP setting interface. The OCP light will illuminate.
2. Setting OCP Value: Rotate the CURRENT knob to adjust the OCP threshold. Press the knob to select individual digits for precise adjustment.
3. Enabling/Disabling OCP:
   • To enable OCP, ensure the power display value is '1'. The OCP light will be ON.
   • To disable OCP, rotate the CURRENT knob left until the power display value is '0'. The OCP light will turn OFF.
4. Saving Settings: Press and hold the CURRENT button for 3 seconds to save the setting and return to the main interface.

6.7 OPN (Output Power On) Function

The OPN function determines the state of the output when the unit is powered on.

Image: Visual guide for enabling and disabling the OPN (Output Power On) function using the OUTPUT button.

1. Entering OPN Setting: Press and hold the OUTPUT button for 3 seconds. The display will show the OPN setting interface.
2. Enabling/Disabling OPN:
   • To enable OPN (output automatically turns on with power), press the OUTPUT button momentarily. The power display value will change to '1', and the OPN light will be ON.
   • To disable OPN (output remains off when powered on), press the OUTPUT button momentarily. The power display value will change to '0', and the OPN light will be OFF.
3. Saving Settings: Press and hold the OUTPUT button for 3 seconds to save the setting and return to the main interface.
4. Note: The OPN setting is persistent and cannot be canceled by simply turning the unit on and off. You must manually change it in the OPN setting interface.

7. Maintenance

Proper maintenance ensures the longevity and reliable operation of your power supply.

• Cleaning: Disconnect the power supply from the AC outlet before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use abrasive cleaners or solvents.
• Ventilation: Regularly check that the ventilation openings and cooling fan are free from dust and debris. Use compressed air to clear any blockages if necessary.
• Storage: When not in use for extended periods, store the power supply in a cool, dry place, away from direct sunlight and extreme temperatures.
• Inspection: Periodically inspect the power cord and test leads for any signs of damage. Replace them if they are frayed or damaged.

8. Troubleshooting

This section addresses common issues you might encounter with your power supply.

9. Specifications

Technical specifications for the Jesverty SPS-12003H DC Variable Power Supply.

10. Warranty and Support

Jesverty products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please contact your original point of purchase or visit the official Jesverty website. Please have your model number (SPS-12003H) and purchase date ready when contacting support.

For the most up-to-date information and support resources, please refer to the manufacturer's official channels.