1. Introduction
The Jesverty SPS-1332 is a compact and lightweight AC-to-DC regulated bench power supply designed for various applications requiring stable DC power. It offers both fixed and variable output voltage options, along with essential protection features and a clear display for monitoring.
Key Features:
- Variable & Fixed Output: Switch between 9-15V continuous variable output voltage and a fixed 13.8V output.
- High Current Capacity: Provides an intermittent maximum output current of up to 30A.
- Noise Offset Function: Helps to mitigate switching noise by shifting it to another frequency.
- LCD Display: A backlit LCD provides real-time monitoring of output voltage and current.
- Integrated Cooling Fan: Forced air cooling prevents internal overheating during operation.
- Comprehensive Protection: Includes short-circuit protection, automatic current limiting (within 30A), and overvoltage protection to ensure user and device safety.
- Compact Design: Measuring 155 (W) x 70 (H) x 205 (D) mm and weighing approximately 1.5 kg, it is designed for portability and space efficiency.
- Versatile Output Terminals: Features banana safety sockets (5A MAX) on the front panel and ground-type screw terminals (30A MAX) on the rear panel.
Image 1.1: Overview of Jesverty SPS-1332 features including protection, low noise, and smart fan.
2. Safety Instructions
Please read and understand all safety instructions before operating the Jesverty SPS-1332 power supply. Failure to follow these instructions may result in electric shock, fire, or damage to the unit or connected equipment.
- Power Source: Connect the unit only to an AC power source within the specified voltage and frequency range. Ensure the power outlet is properly grounded.
- Ventilation: Do not block the ventilation openings. Ensure adequate airflow around the unit to prevent overheating. The integrated cooling fan requires clear space to operate effectively.
- Environment: Operate the power supply in a dry, well-ventilated area, away from direct sunlight, heat sources, and moisture. Avoid operating in environments with excessive dust or corrosive gases.
- Connections: Ensure all connections are secure and correct before applying power. Do not exceed the maximum current ratings for the output terminals (5A for front banana sockets, 30A for rear screw terminals).
- Internal Access: Do not open the casing of the power supply. There are no user-serviceable parts inside, and opening the unit voids the warranty and exposes you to dangerous voltages.
- Liquid Contact: Keep the unit away from liquids. If liquid enters the unit, immediately disconnect power and have it inspected by qualified service personnel.
- Overload Protection: The unit features automatic current limiting and short-circuit protection. However, avoid intentionally short-circuiting the output or drawing excessive current, as this can still cause damage over time.
- Fuse: The unit contains a fuse for protection. If the fuse blows, it indicates an internal fault or severe overload. Replacement should only be done by qualified personnel with a fuse of the correct type and rating.
3. Setup Instructions
Follow these steps to set up your Jesverty SPS-1332 power supply:
3.1 Unpacking and Inspection
- Carefully remove the power supply from its packaging.
- Inspect the unit for any signs of physical damage. If damage is found, do not attempt to operate the unit and contact your supplier.
- Ensure all accessories are present.
3.2 Placement
Place the power supply on a stable, level surface. Ensure there is sufficient space around the unit for proper ventilation, especially around the rear cooling fan.
3.3 Panel Analysis and Connections
Image 3.1: Front and Rear Panel Layout
Refer to Image 3.1 for the location of controls and terminals.
- Power Input: Connect the provided AC power cord to the power input socket on the rear panel and then to a grounded wall outlet.
- Output Connections:
- Front Panel (OUT- / OUT+): Use for loads requiring up to 5A. Connect banana plugs to the red (positive) and black (negative) safety sockets.
- Rear Panel (OUT 13.8V MAX 30A): Use for loads requiring up to 30A. Connect wires to the red (positive) and black (negative) screw terminals. Ensure connections are tight.
- Ground Terminal: The rear panel also features a ground-type terminal for additional grounding if required by your application.
4. Operating Instructions
This section details how to operate your Jesverty SPS-1332 power supply.
4.1 Powering On/Off
- Ensure all connections to your load are correct and secure.
- Flip the ON/OFF switch on the front panel to the 'ON' position. The LCD display will illuminate.
- To power off, flip the ON/OFF switch to the 'OFF' position.
4.2 Voltage Adjustment
Image 4.1: Output Voltage Adjustment Method
The SPS-1332 offers two voltage modes:
- Fixed 13.8V Output: Set the VOLTAGE ADJUST knob to its center position (indicated by a detent or marking). The output will be a stable 13.8V DC.
- Variable 9-15V Output: Rotate the VOLTAGE ADJUST knob clockwise to increase the voltage or counter-clockwise to decrease it. The output voltage can be adjusted continuously between 9.0V and 15.0V. Monitor the LCD display for the current output voltage.
4.3 Noise Offset Function
The NOISE OFFSET knob allows you to shift any potential switching noise to a different frequency, which can be beneficial for sensitive radio equipment. Rotate the knob to find a setting that minimizes interference in your application.
4.4 LCD Display
Image 4.2: LCD Screen Display
The LCD display provides real-time readings of the output voltage (V) and current (A). This allows you to monitor the power supply's performance and the power consumption of your connected device.
5. Maintenance
Proper maintenance ensures the longevity and reliable operation of your Jesverty SPS-1332 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, solvents, or liquids.
- Ventilation: Regularly check that the ventilation openings and the cooling fan on the rear panel are free from dust and debris. A clogged fan can lead to overheating.
- Storage: When not in use for extended periods, store the power supply in a cool, dry place, away from direct sunlight and extreme temperatures.
- Fuse Replacement: The unit is equipped with a fuse for protection. If the power supply fails to turn on, the fuse may have blown. Fuse replacement should only be performed by qualified service personnel using a fuse of the exact same type and rating (e.g., F5A/250V). Incorrect fuse replacement can lead to fire or further damage.
Image 5.1: Fuse Location
Image 5.2: Smart Cooling Fan
6. Troubleshooting
This section provides solutions to common issues you might encounter with your SPS-1332 power supply.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | No AC power; Power switch off; Blown fuse. | Check AC power cord connection and wall outlet. Ensure power switch is ON. If still no power, the fuse may be blown (refer to Maintenance section). |
| No output voltage/current. | Output connections loose; Overload protection activated; Internal fault. | Check output cable connections. Reduce load to ensure it's within 30A. Disconnect load and restart unit. If problem persists, contact support. |
| Output voltage is unstable or incorrect. | VOLTAGE ADJUST knob not set correctly; Poor load connection. | Adjust the VOLTAGE ADJUST knob. Ensure load connections are secure. |
| Excessive noise or interference. | Environmental interference; NOISE OFFSET not optimized. | Adjust the NOISE OFFSET knob. Ensure proper grounding of equipment. Relocate the power supply away from other sensitive electronics. |
| Unit overheats. | Blocked ventilation; Excessive load. | Ensure ventilation openings are clear. Reduce the connected load. Operate in a cooler environment. |
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | 13.8V/9-15V 30A SPS-1332 |
| Brand | Jesverty |
| Output Voltage | Fixed 13.8V DC or Variable 9-15V DC |
| Output Current | Up to 30A (intermittent maximum) |
| Output Power | 155 Watts |
| Dimensions (L x W x H) | 26 x 23 x 11 cm (Product); 155 (W) x 70 (H) x 205 (D) mm (Unit) |
| Weight | 1.5 Kilograms |
| Cooling Method | Fan-based |
| Connector Type | Banana Plug safety connector (front), Ground type terminal (rear) |
| Compatible Devices | General-purpose devices requiring DC power (9-15 V, up to 30 A) |
| Form Factor | Benchtop |
| Country of Origin | China |
Image 7.1: Compact Size and Lightweight Design
8. Warranty and Support
Information regarding the specific warranty period and customer support contact details for the Jesverty SPS-1332 power supply is not available in the provided product data. Please refer to the product packaging, the manufacturer's official website, or your point of purchase for detailed warranty information and customer service contacts.
