1. Introduction
Thank you for choosing the PULME A-SPS-C605 DC Power Supply. This adjustable laboratory power supply is designed for various applications requiring precise voltage and current control, such as phone repair, electronics testing, and educational experiments. It features a digital display for voltage, current, and power, along with comprehensive protection functions to ensure safe and reliable operation.
This manual provides essential information for the safe and efficient use of your device. Please read it thoroughly before operation and retain it for future reference.
2. Safety Instructions
To prevent electric shock, fire, or damage to the product, please observe the following 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 block ventilation openings.
- Do not open the casing; there are no user-serviceable parts inside. Refer servicing to qualified personnel.
- Verify the input voltage setting (110V) matches your local power supply before connecting.
- Before connecting or disconnecting loads, ensure the output is turned off.
- Avoid short-circuiting the output terminals for extended periods, even with protection features.
- Use appropriate test leads and cables rated for the voltage and current levels.
3. Product Overview and Package Contents
The PULME A-SPS-C605 DC Power Supply is a compact unit featuring digital displays and precise control knobs. The package includes the power supply unit, an output line, and a power cable.
Image 3.1: PULME A-SPS-C605 DC Power Supply with accessories. The image shows the front panel of the power supply, displaying '30.00 V', '10.00 A', and '300.0 W'. To the right, '30V 10A 300W' is highlighted, along with 'Product Accessories' listing 'Output Line X1' and 'Power Cable X1', depicted with their respective images.
Front Panel Layout
Image 3.2: Detailed view of the front panel with labels. This image highlights the various controls and displays on the front of the power supply. Labels include 'Voltage Display', 'Current Display', 'Power Display', 'USB Interface (5V/2A) POWER', 'Output negative(-)', 'GND', 'Output positive(+)', 'Voltage Coarse', 'Voltage Fine', 'Current Coarse', 'Current Fine', and 'Output ON/OFF'.
- Voltage Display: Shows the output voltage in Volts (V).
- Current Display: Shows the output current in Amperes (A).
- Power Display: Shows the output power in Watts (W).
- V-COARSE / V-FINE: Knobs for coarse and fine adjustment of the output voltage.
- A-COARSE / A-FINE: Knobs for coarse and fine adjustment of the output current.
- POWER Button: Main power switch for the unit.
- 5V/2A USB: USB output port for charging or powering compatible devices.
- ON/OFF Button: Controls the output to the main terminals.
- Output Terminals (+, -, GND): Connect your load here. Red for positive (+), Black for negative (-), Green for ground (GND).
- C.V / C.C Indicators: LEDs indicating Constant Voltage (C.V) or Constant Current (C.C) operating mode.
4. Setup
- Unpacking: Carefully remove the power supply and all accessories from the packaging. Inspect for any signs of damage.
- Placement: Place the power supply on a stable, level surface with adequate ventilation. Ensure no objects block the air vents on the sides or rear of the unit.
- Power Connection: Connect the provided power cable to the AC input socket on the rear of the power supply and then to a grounded 110V AC power outlet.
- Initial Power On: Press the main POWER button on the front panel. The digital displays should illuminate.
5. Operating Instructions
5.1 Setting Voltage and Current Limits (Pre-setting)
It is recommended to set the desired voltage and current limits before connecting your load.
- Ensure the output is OFF (the ON/OFF button LED is off).
- Adjust the V-COARSE and V-FINE knobs to set the desired output voltage. The voltage display will show the set value.
- Adjust the A-COARSE and A-FINE knobs to set the desired maximum output current (current limit). The current display will show the set value.
- Once the desired voltage and current limits are set, connect your load to the output terminals (+, -, GND) using appropriate test leads.
- Press the ON/OFF button to enable the output. The output will now supply power according to your settings.
Image 5.1: Illustration of coarse and fine adjustment. The image shows how the V-COARSE and V-FINE knobs allow for precise adjustment of voltage, demonstrating a change from 15.00 to 16.23 (coarse) and then to 15.04 (fine).
5.2 Constant Voltage (C.V) and Constant Current (C.C) Modes
- Constant Voltage (C.V) Mode: When the load resistance is high, the power supply maintains the set output voltage. The C.V indicator will be lit. The output current will be determined by the load and will be less than the set current limit.
- Constant Current (C.C) Mode: When the load resistance is low, the power supply maintains the set output current. The C.C indicator will be lit. The output voltage will drop to prevent the current from exceeding the set limit. This mode is crucial for protecting current-sensitive devices.
5.3 Using the USB Output (5V/2A)
The front panel features a dedicated 5V/2A USB output port. This port provides a fixed 5V output at up to 2A, independent of the main adjustable DC output. It can be used to charge or power compatible USB devices.
5.4 Protection Functions
The power supply incorporates several protection features:
- Over Temperature Protection (OTP): If the internal temperature exceeds a safe limit, the unit will shut down or reduce output to prevent damage.
- Overload Protection (OLP): If the load draws excessive power, the unit will limit output or shut down.
- Short Circuit Protection (SCP): In case of a short circuit at the output terminals, the power supply will stop output and may sound an alarm to prevent damage to the unit and the connected load.
6. 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 are clear of dust and debris. The internal cooling fan activates when the internal temperature exceeds 50°C (122°F) to maintain optimal operating conditions.
- Storage: When not in use for extended periods, store the power supply in a cool, dry environment, away from direct sunlight and extreme temperatures.
Image 6.1: Internal components and cooling fan. This image shows the internal circuitry of the power supply, highlighting the intelligent temperature control fan which starts operating when the temperature exceeds 50°C (122°F).
7. Troubleshooting
If you encounter issues with your power supply, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/displays off | Power cable disconnected, main power switch off, faulty outlet. | Check power cable connection, ensure main POWER button is pressed, test outlet with another device. |
| No output voltage/current | Output ON/OFF button is off, current limit set too low, protection activated. | Press the ON/OFF button to enable output, increase current limit, check for short circuits or overloads. |
| C.C indicator always on | Load resistance is too low, or current limit is reached. | This is normal operation. If unintended, increase the current limit or check your load. |
| Unit overheats/shuts down | Blocked ventilation, excessive load, high ambient temperature. | Ensure vents are clear, reduce load, operate in a cooler environment. Allow unit to cool before restarting. |
If the problem persists after attempting these solutions, please contact customer support.
8. Specifications
The following table details the technical specifications of the PULME A-SPS-C605 DC Power Supply:
| Parameter | Value |
|---|---|
| Input Voltage | AC 110V 50/60Hz |
| Output Voltage | 0 ~ 30V (Continuously Adjustable) |
| Output Current | 0 ~ 10A (Continuously Adjustable) |
| Voltage Resolution | 100mV |
| Current Resolution | 10mA |
| Voltage Regulation (Line) | <5mV |
| Voltage Regulation (Load) | <5mV |
| Current Regulation (Line) | <3mA |
| Current Regulation (Load) | <3mA |
| Ripple & Noise | 5mVrms, 100mVp-p |
| Voltage Display Precision | ±(0.5% of rdg + 2 digits) |
| Current Display Precision | ±(0.5% of rdg + 2 digits) |
| Operating Temperature & Humidity | 0 ~ 40°C, RH<80% |
| Storage Temperature & Humidity | -10 ~ 70°C, RH<70% |
| Item Weight | 1.1 pounds (500 Grams) |
| Fan Count | 1 |
| Package Dimensions | 12.48 x 8.23 x 5.08 inches |
Image 8.1: Product dimensions and accessories. The image shows the power supply with its dimensions labeled as 139mm (5.5in) height, 215mm (8.4in) depth, and 85mm (3.3in) width. Below it, a 100cm output line and a power cable are shown, along with an icon indicating a weight of 2.6 lb.
9. Warranty and Support
For warranty information or technical support, please refer to the documentation provided with your purchase or contact the seller directly. Keep your purchase receipt as proof of purchase.
