SURRYN Bench DC Power Supply Instruction Manual

1. Introduction

This manual provides detailed instructions for the safe and efficient operation, setup, and maintenance of your SURRYN Bench DC Power Supply. Please read this manual thoroughly before using the device to ensure proper functionality and to prevent damage.

The SURRYN Bench DC Power Supply is an adjustable, stabilized switching power source designed for laboratory, electronic repair, DIY projects, communication equipment maintenance, and scientific research. It features automatic power calculation, a 5V/3.6A USB fast charging interface, and multiple safety protections.

Figure 1: Front view of the SURRYN DPS305U Bench DC Power Supply, showing the digital display for voltage, current, and power, along with control knobs and output terminals.

2. Safety Precautions

• 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 switch setting (115V/230V) matches your local power supply before connecting.
• In case of a short circuit, the device will alarm and stop output. Address the short circuit before resuming operation.

3. Product Features

• Automatic Power Calculation: Displays 4-digit voltage, current, and power values simultaneously with high accuracy (0.01V, 0.001A).
• 5V/3.6A USB Interface: Built-in fast charging protocol identification chip for quick charging of mobile devices or powering repair equipment.
• Short Circuit Alarm: Automatically stops output and sounds an alarm upon detecting a short circuit, enhancing safety and prolonging device life.
• Comprehensive Safety Protections: Includes overvoltage, overcurrent, overheating, and overload protection.
• Intelligent Temperature-Controlled Fan: Ensures efficient heat dissipation for stable operation.
• Compact and Lightweight Design: Saves workbench space.

4. Setup

4.1 Unpacking and Inspection

Carefully remove the power supply and all accessories from the packaging. Inspect for any signs of damage during transit. If any damage is found, contact your supplier immediately.

Package Contents:

• 1 x Power Host (Bench DC Power Supply Unit)
• 1 x Output Power Cord (Test Leads)
• 1 x Input Power Cord (AC Power Cable)
• 1 x User Manual (This document)

4.2 Initial Connection

1. Voltage Switch Setting: Locate the 230V/115V switch on the rear panel of the power supply. Ensure it is set to match your local AC power voltage (e.g., 115V for North America, 230V for Europe).
2. Connect AC Power: Insert the input power cord into the AC power input socket on the rear panel of the power supply, then plug the other end into a grounded wall outlet.
3. Connect Output Leads: Connect the output power cords (test leads) to the positive (+) and negative (-) terminals on the front panel. Ensure a secure connection.

Figure 2: Detailed view of the power supply's front and rear panels, highlighting the AC power input, 230V/115V switch, fuse box, cooling fan, USB Quick Charging Interface, display screen, control knobs, and output terminals.

5. Operating Instructions

5.1 Front Panel Overview

Figure 3: Front panel of the power supply, emphasizing the Short Circuit Alarm indicator and the USB Quick-Charge Interface.

• Display Screen: Shows 4-digit voltage (V), current (A), and power (W) values.
• V-COARSE / V-FINE Knobs: Adjust output voltage (coarse and fine adjustments).
• A-COARSE / A-FINE Knobs: Adjust output current limit (coarse and fine adjustments).
• ON/OFF Button: Powers the unit on or off.
• Output Terminals (+, -, GND): Connect test leads for power output.
• USB Quick Charging Interface: Provides 5V/3.6A output for charging devices.
• C.V. / C.C. Indicators: Constant Voltage (C.V.) and Constant Current (C.C.) mode indicators.
• OCP Indicator: Over Current Protection indicator.
• Quick Charge Indicator: Illuminates when the USB quick charge function is active.

5.2 Basic Operation

1. Power On: Press the ON/OFF button. The display will illuminate.
2. Set Voltage: Use the V-COARSE knob for large voltage adjustments and the V-FINE knob for precise adjustments. Observe the voltage reading on the display.
3. Set Current Limit: Use the A-COARSE knob for large current limit adjustments and the A-FINE knob for precise adjustments. This sets the maximum current the power supply will deliver.
4. Connect Load: After setting the desired voltage and current limit, connect your device or circuit to the output terminals.
5. Monitor Output: The display will show the actual voltage, current, and calculated power being delivered to the load. The C.V. or C.C. indicator will light up depending on the operating mode.
6. USB Quick Charge: To use the USB charging function, simply plug your device into the USB Quick Charging Interface. The Quick Charge indicator will light up.

Note: It is recommended to set the voltage and current limit before connecting the load to prevent accidental overvoltage or overcurrent to your device.

5.3 Automatic Power Calculation

The power supply automatically calculates and displays the output power (in Watts) based on the current voltage and current readings. This feature provides real-time power consumption information for your connected load.

Figure 4: The power supply's display showing precise voltage, current, and power readings, demonstrating its high resolution of 0.01V and 0.001A.

6. Maintenance

6.1 Cleaning

Ensure the power supply is turned off and disconnected from the AC power outlet before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use abrasive cleaners or solvents.

6.2 Ventilation

Keep the ventilation openings on the sides and rear of the unit clear of obstructions to ensure proper airflow. The intelligent temperature-controlled fan will activate as needed to maintain optimal operating temperature.

Figure 5: Internal view highlighting the cooling fan and heat sink, which contribute to the intelligent temperature control and efficient heat dissipation.

6.3 Fuse Replacement

If the power supply does not turn on, check the fuse located in the fuse box on the rear panel. Disconnect the AC power cord, open the fuse box, and replace the fuse with one of the same type and rating. Refer to the specifications for fuse details.

7. Troubleshooting

• No Power:
  • Check if the AC power cord is securely connected to both the power supply and the wall outlet.
  • Verify the 230V/115V switch on the rear panel is set correctly for your region.
  • Check and replace the fuse if necessary (refer to Section 6.3).
• No Output Voltage/Current:
  • Ensure the ON/OFF button is pressed.
  • Check if the output leads are correctly connected to the terminals and the load.
  • Verify that the voltage and current limit knobs are adjusted to desired values.
• Short Circuit Alarm:
  • If the short circuit alarm sounds and output stops, immediately disconnect the load.
  • Identify and resolve the short circuit in your connected circuit or device.
  • Once the short circuit is cleared, the power supply can resume normal operation.
• Overheating:
  • Ensure adequate ventilation around the power supply.
  • Clear any obstructions from the cooling fan and vents.
  • Reduce the load if operating continuously at maximum capacity in a high ambient temperature.

8. Specifications

General Specifications:

• Brand: SURRYN
• Model: DPS3010U (30V 10A), DPS305U (30V 5A)
• Input Voltage: AC 115V/230V ±10% (Switchable)
• Display: 4-digit LED for Voltage, Current, Power
• Voltage Accuracy: 0.01V
• Current Accuracy: 0.001A
• USB Output: 5V/3.6A (Quick Charge)
• Safety Protections: Overvoltage, Overcurrent, Overheating, Overload, Short Circuit Alarm
• Cooling: Intelligent Temperature-Controlled Fan
• Dimensions: Approximately 8.86 x 3.54 x 5.7 inches (22.5 x 9 x 14.5 cm)
• Item Weight: Approximately 4.41 pounds (2 kg)

Figure 6: Product dimensions of the SURRYN switching power supply, illustrating its compact size compared to a traditional linear power supply.

Model Specifics:

• DPS3010U:
  • Output Voltage: 0-30V DC
  • Output Current: 0-10A
  • Output Power: 0-300W
• DPS305U:
  • Output Voltage: 0-30V DC
  • Output Current: 0-5A
  • Output Power: 0-150W

9. Warranty and Support

SURRYN products are designed for reliability and performance. For warranty information, please refer to the terms and conditions provided at the point of purchase or contact your retailer.

For technical support, troubleshooting assistance, or inquiries regarding your SURRYN Bench DC Power Supply, please contact the seller or manufacturer directly through the platform where the product was purchased. Please have your model number (DPS3010U or DPS305U) and purchase date available when seeking support.