1. Introduction
The OWON SPE8205 is a high-performance programmable DC lab power supply designed for various applications requiring precise voltage and current control. It features a 2.8-inch TFT LCD for multi-information display, constant power design, and comprehensive protection functions. This manual provides essential information for the safe and efficient operation of your device.
Key features include:
- 2.8-inch TFT LCD for simultaneous display of voltage, current, power, runtime, and channel status.
- Multiple protection functions: current limit, thermal, voltage overload (OVP), short circuit, and overpower (OCP).
- Convenient 5V/1A USB output port for charging mobile devices.
- Rear USB communication port for firmware updates and PC software control.
- Programmable with four groups of shortcut parameters and support for waveform editing output and editable timing output for up to ten groups.
- Compact and lightweight design, measuring 3.2 x 8.9 x 5.6 inches and weighing 3.3 pounds.
2. Safety Instructions
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in injury or damage to the product.
- Power Source: Connect the power supply only to a grounded AC outlet with the correct voltage range (90-120V AC).
- Ventilation: Ensure adequate ventilation around the unit. Do not block ventilation openings.
- Environment: Operate the device in a dry environment, away from moisture, dust, and corrosive gases. Avoid direct sunlight and high temperatures.
- Output Terminals: Do not touch the output terminals when the power supply is operating. Ensure proper insulation for all connections.
- Overload: Do not exceed the maximum output voltage, current, or power ratings of the device.
- Maintenance: Refer all servicing to qualified personnel. Do not attempt to open or repair the unit yourself.
- Grounding: Always ensure the power supply is properly grounded to prevent electric shock.
3. Product Overview
3.1 Front Panel
Figure 3.1: Front Panel of the OWON SPE8205 Power Supply
The front panel features a 2.8-inch LCD display, control buttons, an adjustment knob, and output terminals. Key components include:
- 2.8-inch LCD: Displays output voltage, current, power, and settings.
- Voltage Setting Button (V): Used to adjust the output voltage.
- Current Setting Button (I): Used to adjust the output current.
- Overvoltage Protection (OVP) Button: Sets the overvoltage protection limit.
- Overcurrent Protection (OCP) Button: Sets the overcurrent protection limit.
- Display Button: Toggles between different display modes or curve displays.
- Memory Button: Accesses memory functions for saving and recalling settings. Long press to enter waveform timing output interface.
- On/Off Button: Toggles the output channel on or off. Long press to activate the automatic output function.
- Adjustment Knob: Used to fine-tune voltage, current, and other parameter settings.
- Channel Output Terminals: Red (+) and Black (-) terminals for connecting the load. A green ground terminal is also provided.
3.2 Rear Panel
Figure 3.2: Rear Panel of the OWON SPE8205 Power Supply
The rear panel includes the main power input, fuse, power switch, and communication ports.
- Power Cord Socket: Connects the AC power cord.
- Fuse: Protects the unit from overcurrent.
- Power Switch: Turns the main power to the unit on or off.
- USB Device Communication Port: For PC software control and firmware updates (supports SCPI commands).
- Intelligent Temperature Control Fan: Provides cooling for the internal components.
4. Installation and Setup
4.1 Unpacking and Inspection
Upon receiving the OWON SPE8205, carefully unpack the unit and inspect it for any signs of damage during transit. Verify that all accessories listed in the package contents are present.
4.2 Power Connection
- Ensure the power switch on the rear panel is in the OFF position.
- Connect the provided power cord to the power cord socket on the rear panel.
- Plug the other end of the power cord into a grounded AC outlet (90-120V AC).
4.3 Output Terminal Connection
- Connect the positive (+) lead of your load to the red output terminal.
- Connect the negative (-) lead of your load to the black output terminal.
- For safety and noise reduction, connect the ground lead of your load (if applicable) to the green ground terminal.
- Ensure all connections are secure and properly insulated.
5. Basic Operation
5.1 Powering On/Off
- Flip the main power switch on the rear panel to the ON position. The LCD display will illuminate.
- To power off, flip the main power switch to the OFF position.
5.2 Setting Voltage and Current
- Press the V button to select voltage adjustment. The voltage value on the display will become editable.
- Rotate the Adjustment Knob to set the desired voltage. Press the knob to switch between digit selection for fine-tuning.
- Press the I button to select current adjustment. The current value on the display will become editable.
- Rotate the Adjustment Knob to set the desired current limit. Press the knob to switch between digit selection.
- Once settings are complete, press the V or I button again to exit adjustment mode.
5.3 Output Enable/Disable
Press the On/Off button on the front panel to enable or disable the output to the terminals. When the output is enabled, the display will show the actual output voltage and current. When disabled, the output terminals are de-energized.
5.4 Multi-Information Display
Figure 5.4: Detailed View of the 2.8-inch LCD Display
The 2.8-inch TFT LCD simultaneously displays critical operational data:
- Channel Output Status: Indicates if the output is ON or OFF.
- CV/CC Mode: Shows whether the unit is operating in Constant Voltage (CV) or Constant Current (CC) mode.
- Cumulative Running Time: Tracks the total operational time.
- Actual Output Power: Displays the real-time power being delivered.
- Actual Voltage Output: The measured voltage at the output terminals.
- Actual Current Output: The measured current flowing through the load.
- Set Values (V/I): The configured voltage and current limits.
- Limit Values (OVP/OCP): The set Overvoltage and Overcurrent Protection limits.
6. Advanced Features
6.1 Constant Power Design
Figure 6.1: Constant Power Wide Range Specifications
The SPE8205 features a constant power design, allowing flexible configuration of higher voltage and current within its rated 500W power range. This means you can achieve various voltage/current combinations as long as their product does not exceed 500W. For example, you can set 80V at 6.25A or 25V at 20A.
6.2 Protection Functions (OVP, OCP, OTP, Short Circuit)
The power supply incorporates multiple protection mechanisms to safeguard both the unit and the connected load:
- Overvoltage Protection (OVP): If the output voltage exceeds the preset OVP limit, the output will be disabled. Set OVP using the OVP button.
- Overcurrent Protection (OCP): If the output current exceeds the preset OCP limit, the output will be disabled. Set OCP using the OCP button.
- Thermal Protection (OTP): The unit will shut down if internal temperatures become too high.
- Short Circuit Protection: Automatically protects against short circuits at the output terminals.
- Overpower Protection: Limits output power to prevent damage.
6.3 Memory Functions
The SPE8205 allows you to save and recall up to four groups of frequently used voltage and current settings. This enables quick configuration for repetitive tasks.
- Saving Settings: Set the desired voltage and current, then press and hold the Memory button. Use the adjustment knob to select a memory location (1-4) and press the knob to confirm saving.
- Recalling Settings: Press the Memory button briefly. Use the adjustment knob to select the desired memory location and press the knob to recall the settings.
6.4 USB Communication and 5V/1A Output
The rear USB port facilitates communication with a PC for advanced control and firmware updates. Dedicated PC software can be used to program and monitor the power supply. Additionally, a 5V/1A USB output port on the front panel provides convenient charging for mobile devices or powering small USB-powered accessories.
7. Specifications
Figure 7.1: OWON SPE8205 Detailed Product Specifications
The instrument must be operated continuously for more than 30 minutes at the specified operating temperature to achieve the following specifications:
| Parameter | Specification |
|---|---|
| Model | SPE8205 |
| Output Voltage | 0-80V |
| Output Current | 0-20A |
| Max Output Power | 500W |
| OVP (Overvoltage Protection) | 85V |
| OCP (Overcurrent Protection) | 21A |
| OTP (Overtemperature Protection) | 85°C |
| Load Regulation | ≤20mV (Voltage); ≤10mA (Current) |
| Power Regulation | ≤20mV (Voltage); ≤10mA (Current) |
| Setting Resolution | 10mV / 1mA |
| Readback Resolution | 10mV / 1mA |
| Setting Accuracy (25°C±5°C) | ≤0.01%±20mV (Voltage); ≤0.05%±10mA (Current) |
| Readback Accuracy (25°C±5°C) | ≤0.01%±20mV (Voltage); ≤0.05%±10mA (Current) |
| Ripple & Noise (*Note) | ≤50mVp-p; ≤15mAp-p |
| Output temperature coefficient (0°C-40°C) | 100ppm/°C (Voltage); 200ppm/°C (Current) |
| Readback temperature coefficient | 100ppm/°C (Voltage); 200ppm/°C (Current) |
| Response Time (50%-100% rated load) | ≤5.0ms |
| Storage | 4 groups of data |
| Display | 2.8inch LCD (IPS) |
| Interface | USB Device |
| Dimension (W x H x D) | 82mm (W) x 142mm (H) x 226mm (D) |
| Weight | Approx. 1.8 kg |
*Note: Ripple & Noise (Noise bandwidth 20MHz, ripple bandwidth 1MHz, connect 10uF electrolytic capacitor in parallel with 0.1uF ceramic capacitor to the output terminal for testing).
8. Maintenance
Proper maintenance ensures the longevity and reliable operation of your OWON SPE8205 power supply.
- Cleaning: Disconnect the power supply from the AC outlet and all loads 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 on the sides and rear are clear of dust and obstructions.
- Storage: When not in use for extended periods, store the unit in a dry, dust-free environment within its specified operating temperature range.
- Fuse Replacement: If the fuse blows, replace it only with a fuse of the same type and rating as specified on the rear panel. Ensure the unit is disconnected from power before attempting fuse replacement.
9. Troubleshooting
This section addresses common issues you might encounter with the OWON SPE8205 power supply.
- No Power:
- Check if the power cord is securely connected to both the unit and the AC outlet.
- Ensure the rear power switch is in the ON position.
- Verify the AC outlet is functional.
- Check the fuse on the rear panel and replace if blown.
- No Output Voltage/Current:
- Ensure the front panel On/Off button is pressed to enable the output.
- Check if OVP or OCP has been triggered. If so, clear the fault and reset the output.
- Verify that the voltage and current settings are not set to zero.
- Inspect output leads for proper connection and continuity.
- Unstable Output:
- Ensure the load is properly connected and stable.
- Check for loose connections in the output circuitry.
- Verify that the ambient temperature is within the specified operating range.
- Fan Noise:
- The intelligent temperature control fan will activate and adjust speed based on internal temperature and load. Increased fan noise under heavy load is normal.
- Ensure ventilation openings are not blocked.
If the problem persists after attempting these troubleshooting steps, please contact OWON customer support.
10. Warranty and Support
OWON products are designed and manufactured to high-quality standards. For warranty information and technical support, please refer to the documentation included with your purchase or visit the official OWON website.
For further assistance, you may also visit the OWON Store on Amazon.
