OWON SPE8105/SPE8205 Programmable DC Power Supply User Manual

1. Introduction

The OWON SPE8105 and SPE8205 are single-channel programmable DC power supplies designed for laboratory and testing environments. These units offer high precision, stability, and a wide range of features for various applications, including battery charging, aging tests, and mobile phone repair. With an ultra-thin body and intuitive interface, they are both portable and easy to use.

Figure 1: Front view of the OWON SPE8105/SPE8205 Power Supply.

2. Key Features

• Ultra-thin body, portable and easy to use.
• 500W constant power design with a wide application range.
• Over Voltage Protection (OVP) and Over Current Protection (OCP).
• Power-on automatic output setting function, suitable for unattended operations.
• Intelligent temperature control fan for reduced noise.
• 4 groups of Memory shortcut parameters for quick output recall.
• USB Device communication port with SCPI support.
• Constant Voltage (CV) and Constant Current (CC) intelligent switching mode for circuit protection.
• 2.8-inch IPS LCD display for comprehensive information.
• List waveform editing output, supporting 10 groups of timed outputs.
• Stable output with low ripple and noise, meeting high-precision testing requirements.
• Equipped with TI C2000 microcontroller for digital high-resolution control and 24-bit high-end ADC sampling.

Figure 2: Overview of key features and applications.

3. Safety Information

WARNING:

• To avoid electric shock, the power cord protective grounding conductor must be connected to ground.
• Do not remove covers. Refer servicing to qualified personnel only.
• Ensure proper ventilation around the unit to prevent overheating.
• Do not operate in wet or damp conditions.
• Avoid using banana plug connection terminals when the output current is >10A.

Figure 3: Rear panel showing power input, fuse, USB port, and safety warnings.

4. Package Contents

Please check the package contents upon receipt:

1. OWON SPE8105/SPE8205 Power Supply Main Device
2. User Manual
3. Power Cord
4. USB Cable
5. Standard OT terminal φ 6mm to alligator clip cable (20A, one red and one black)

Figure 4: Included accessories in the product package.

5. Initial Setup

Follow these steps to set up your OWON Programmable DC Power Supply:

1. Placement: Place the power supply on a stable, level surface with adequate ventilation. Ensure there is enough space around the unit for airflow.
2. Power Connection: Connect the provided power cord to the AC input socket on the rear panel of the device. Plug the other end into a grounded electrical outlet.
3. Load Connection: Connect your load to the channel output terminals on the front panel. Use the provided alligator clip cables, ensuring correct polarity (red for positive, black for negative, green for ground). For currents exceeding 10A, avoid using banana plug connection terminals.
4. Power On: Flip the power switch on the rear panel to the 'ON' position. The display will light up.
5. Initial Check: Observe the display for any error messages or unusual readings.

Figure 5: Front panel controls and rear panel connections.

6. Operation

6.1 Front Panel Controls and Display

The front panel features a 2.8-inch IPS LCD display and various control buttons and an adjustment knob:

Figure 6: Detailed view of the 2.8-inch IPS LCD display and controls.

• Display: Shows Channel Output Status (ON/CV/T), cumulative running time, actual output power, actual voltage output, actual current output, set values of voltage/current, and Overvoltage/Overcurrent Protection (OVP/OCP) setpoints.
• V Button: Voltage setting button.
• I Button: Current setting button.
• OVP Button: Overvoltage protection setting.
• OCP Button: Overcurrent protection setting.
• Display Button: Curve display switch button.
• Memory Button: Accesses memory shortcut parameters.
• On/Off Button: Independent output On/Off control. Long press to turn on the automatic output function (output voltage/current 5 seconds after booting).
• Adjustment Knob: Used to adjust values and navigate menus.
• Channel Output Terminals: For connecting the load.

6.2 Basic Operation

1. Setting Voltage and Current: Press the 'V' button to set voltage or 'I' button to set current. Use the adjustment knob to change the values. Press the knob to confirm.
2. Output On/Off: Press the 'On/Off' button to enable or disable the output. The display will indicate 'ON' when the output is active.
3. Overvoltage/Overcurrent Protection (OVP/OCP): Press the 'OVP' or 'OCP' button to set the protection limits. Use the adjustment knob to set the desired voltage or current limit. These settings protect your circuit from damage.
4. Constant Voltage (CV) / Constant Current (CC) Mode: The power supply intelligently switches between CV and CC modes to effectively protect the circuit. When the actual current exceeds the preset current value, the power supply automatically switches to CC mode.

Figure 7: Multiple settings to protect your circuit, including OVP/OCP and CV/CC modes.

6.3 Advanced Functions

1. List Waveform Editing: The unit supports list waveform editing, allowing you to program up to 10 groups of timed outputs. This is useful for automated testing sequences.
2. Memory Shortcut Parameters: Store and recall up to 4 groups of frequently used settings for quick output.
3. PC Software and SCPI Communication: The power supply supports PC software programming output via its USB device communication port, utilizing the SCPI (Standard Commands for Programmable Instruments) communication function. This enables remote control and automation.

Figure 8: List waveform editing and memory shortcut parameter interfaces.

Figure 9: PC software interface for programming and control via USB.

7. Maintenance

• Cleaning: Regularly clean the exterior of the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Ventilation: Ensure the ventilation openings are clear of dust and obstructions to maintain proper cooling.
• Storage: When not in use for extended periods, store the power supply in a dry, dust-free environment.
• Calibration: For optimal performance and accuracy, periodic calibration by qualified personnel is recommended.

8. Troubleshooting

• No Power: Check the power cord connection and the power switch on the rear panel. Ensure the electrical outlet is functioning. Check the fuse on the rear panel and replace if blown (use a 250V, F10A fuse).
• No Output: Ensure the 'On/Off' button on the front panel is pressed to enable output. Check all load connections for proper contact and polarity.
• Unexpected Shutdown: This could be due to OVP, OCP, or OTP (Over Temperature Protection). Check your settings and ensure the load is within the specified limits. Allow the unit to cool down if it was operating at high temperatures.
• Inaccurate Readings: Verify all connections are secure. If the issue persists, the unit may require calibration.
• PC Communication Issues: Ensure the USB cable is securely connected. Verify that the correct drivers are installed on your PC and the SCPI communication software is configured properly.

9. User Tips

• For high current applications (above 10A), always use the provided alligator clip cables and ensure robust connections to minimize resistance and heat buildup.
• Utilize the 4 memory groups to quickly switch between frequently used voltage and current settings, saving time during repetitive tasks.
• When performing sensitive measurements, ensure the power supply is properly grounded to minimize noise.
• The intelligent temperature control fan helps maintain optimal operating temperature and reduces noise, but ensure adequate clearance for airflow.

10. Specifications

The instrument must be operated continuously for more than 30 minutes at the specified operating temperature to achieve the following specifications:

(*) Ripple & Noise: (Nominal bandwidth 20MHz, ripple bandwidth 1MHz, connect 10uF electrolytic capacitor in parallel with 0.1uF ceramic capacitor to the output terminal for testing)

Figure 10: Dimensions and internal components of the power supply.

Figure 11: Stability testing of the power supply, demonstrating low ripple and noise.

11. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the official OWON website or contact your local distributor. Keep your purchase receipt as proof of purchase.