1. Introduction
The OWON SPE Series Programmable DC Power Supply is a single-channel switching power supply designed for a wide range of applications. It features a compact body, high resolution, low ripple and noise, and comprehensive protection mechanisms. This manual provides detailed instructions for the safe and efficient operation of your device.
Key Features:
- Compact and portable design
- High resolution: 10mV / 1mA
- List waveform editing output, supporting 10 groups of timing output
- Low ripple and noise for stable output
- Over Voltage Protection (OVP) and Over Current Protection (OCP)
- Output voltage and current curve monitoring function
- Intelligent temperature control fan cooling for reduced noise
- 2.8-inch TFT LCD display for clear information
- USB Device interface for PC programming and SCPI support
2. Safety Information
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in electric shock, fire, or personal injury.
- Always connect the power supply to a grounded outlet.
- Do not operate the device in wet or damp conditions.
- Do not open the device casing; refer servicing to qualified personnel.
- Ensure proper ventilation to prevent overheating.
- Verify voltage and current settings before connecting to a load.
3. Product Overview
3.1 Front Panel
Figure 3.1: Front Panel Layout (SPE3103 model shown)
- 2.8-inch LCD: Displays voltage, current, power, status, and settings.
- Shortcut output button: Long press to enter the List waveform timing output interface.
- Voltage setting button (V): Adjusts output voltage.
- Current setting button (I): Adjusts output current.
- Overvoltage protection setting (OVP): Configures overvoltage limit.
- Overcurrent protection setting (OCP): Configures overcurrent limit.
- Display button: Toggles curve display.
- Memory button: Accesses saved settings.
- Adjustment knob: Used for navigating menus and adjusting values.
- On/Off button: Controls channel output. Long press to turn on the automatic output function.
- Front USB port (5V/1A for SPE series, 18W for SPE-U series): Supports fast charging protocols (QC 2.0, QC 3.0, BC 1.2).
- Channel output terminals: Red (+) and Black (-) for main power output, Green for ground.
3.2 Rear Panel
Figure 3.2: Rear Panel Layout
- Intelligent temperature control fan: Provides cooling and reduces noise.
- Power cord socket: Connects the device to mains power.
- Fuse: Overcurrent protection for the device.
- Power switch: Turns the device on/off.
- USB Device communication port: Supports PC programming and SCPI commands.
3.3 Dimensions
Figure 3.3: Device Dimensions
The device measures approximately 82mm (width) x 142mm (height) x 226mm (depth) and weighs approximately 1.5kg.
4. Specifications
The instrument must be operated continuously for more than 30 minutes at the specified temperature to ensure the following parameters.
| Model | SPE3051(U) | SPE3102(U) | SPE6102(U) | SPE6053(U) | SPE3103(U) | SPE6103(U) | |||
|---|---|---|---|---|---|---|---|---|---|
| Channel | Single Channel Output | ||||||||
| Total Output Power | 150W | 200W | 300W | ||||||
| Rated Output (0℃-40℃) | Voltage | 0 - 30V | 0 - 30V | 0 - 60V | 0 - 60V | 0 - 30V | 0 - 60V | ||
| Current | 5A | 10A | 10A | 5A | 10A | 10A | |||
| Power | 150W | 200W | 200W | 300W | 300W | 300W | |||
| USB Output | 5V/1A (SPE series) or 18W output, for fast charging under QC 2.0, QC 3.0, BC 1.2, and mainstream quick charging protocols (SPE-U series) | ||||||||
| Load Regulation | Voltage | ≤30mV | |||||||
| Current | ≤20mA | ||||||||
| Power Regulation | Voltage | ≤30mV | |||||||
| Current | ≤20mA | ||||||||
| Setting Resolution | Voltage | 10mV | |||||||
| Current | 1mA | ||||||||
| Readback Resolution | Voltage | 10mV | |||||||
| Current | 1mA | ||||||||
| Setting Accuracy | Voltage | ≤0.1% ± 20mV | ≤0.1% ± 30mV | ≤0.1% ± 20mV | ≤0.1% ± 30mV | ||||
| Current | ≤0.1% ± 10mA | ||||||||
| Readback Accuracy | Voltage | ≤0.1% ± 20mV | ≤0.1% ± 30mV | ≤0.1% ± 20mV | ≤0.1% ± 30mV | ||||
| Current | ≤0.1% ± 10mA | ||||||||
| Ripple/Noise(*) | Voltage(Vp-p) | ≤30mVp-p | ≤50mVp-p | ≤30mVp-p | ≤50mVp-p | ||||
| Voltage (rms) | ≤3mVrms | ≤5mVrms | ≤3mVrms | ≤5mVrms | |||||
| Current | ≤30mAp-p | ||||||||
| Output temperature coefficient (0℃-40℃) | Voltage | 100ppm/℃ | |||||||
| Current | 200ppm/℃ | ||||||||
| Readback temperature coefficient | Voltage | 100ppm/℃ | |||||||
| Current | 200ppm/℃ | ||||||||
| Response Time (50%-100% rated load) | ≤1.0ms | ||||||||
| Storage | 4 groups of data | ||||||||
| Working Temperature | 0-40℃ | ||||||||
* Noise bandwidth 20MHz, ripple bandwidth 1MHz, connect 10uF electrolytic capacitor in parallel with 0.1uF ceramic capacitor to the output terminal for testing. The above parameters are subject to change without further notice, please refer to the website update.
5. Setup
5.1 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 power outlet.
5.2 Output Terminal Connection
- Connect the red test lead to the red (+) output terminal and the black test lead to the black (-) output terminal.
- Connect the other ends of the test leads to your load. Ensure correct polarity.
- For safety, ensure all connections are secure before powering on the device or enabling output.
5.3 USB Connection (for PC Programming)
- Connect a USB cable from the USB Device communication port on the rear panel to your computer.
- Install the necessary drivers and software provided by OWON for PC programming and SCPI communication.
6. Operating Instructions
6.1 Basic Operation
- Turn on the power switch on the rear panel.
- Press the 'On/Off' button on the front panel to enable or disable the output. The display will show 'ON' or 'OFF'.
- To set the voltage, press the 'V' button. Use the adjustment knob to change the value. Press the knob to confirm.
- To set the current, press the 'I' button. Use the adjustment knob to change the value. Press the knob to confirm.
6.2 Constant Power Design
The SPE series features a constant power design, allowing for a wide application range by providing flexible configuration of higher voltage or larger current within the rated power range. For example, a 300W power supply can deliver 30V/10A or 60V/5A.
Figure 6.1: Constant Power Design Example (SPE6103)
6.3 Output Voltage and Current Curve Monitoring
The device can monitor and display the readback voltage and current situation over a period of time, which is useful for applications like battery charging, aging tests, and phone repair.
- Press the 'Display' button to switch to the curve monitoring interface.
- Observe the real-time voltage and current curves on the 2.8-inch TFT LCD.
Video 6.1: Demonstration of Output Voltage and Current Curve Monitoring
6.4 Memory Shortcut Parameters
The device allows you to save and quickly recall up to 4 groups of frequently used settings.
- Press the 'Memory' key to enter the memory settings interface.
- Use the 'V', 'I', 'OVP', 'OCP' keys and the adjustment knob to set the desired parameters for each memory group (M1-M4).
- After setting, long press the knob to output the setting value.
6.5 List Waveform Editing Timing Output
The device supports editing and outputting up to 10 groups of list waveforms with timing control.
- Long press the 'Memory' key to enter the list waveform editing interface.
- Use the 'V', 'I', 'OVP', 'OCP' keys and the adjustment knob to set the voltage, current, and timing for each step (1-10).
- After setting the current group, wait for 1 second before selecting other groups for setting.
- After setting all groups, long press the knob to enable the waveform output. A prompt will be displayed at the upper right of the screen.
6.6 Over Voltage Protection (OVP) and Over Current Protection (OCP)
These features protect your circuit from damage due to excessive voltage or current.
- Press the 'OVP' button to set the overvoltage protection limit. Use the adjustment knob to set the value.
- Press the 'OCP' button to set the overcurrent protection limit. Use the adjustment knob to set the value.
- When the output voltage or current exceeds the preset limit, the power supply will automatically shut down the output to protect the connected load.
6.7 Constant Voltage (CV) / Constant Current (CC) Mode
The power supply intelligently switches between Constant Voltage (CV) and Constant Current (CC) modes to effectively protect the circuit.
- CV Mode: The output voltage remains constant at the set value, while the current varies depending on the load.
- CC Mode: The output current remains constant at the set value, while the voltage varies depending on the load.
- When the actual current exceeds the preset current value, the power supply automatically switches to CC mode to protect the circuit.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use abrasive cleaners or solvents.
- Ventilation: Ensure the fan vents on the rear panel are clear of obstructions to allow for proper airflow and prevent overheating.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Fuse Replacement: If the fuse blows, replace it with a fuse of the same type and rating as specified on the rear panel. Refer to qualified personnel if unsure.
8. Troubleshooting
8.1 No Power
- Check if the power cord is securely connected to both the device and the power outlet.
- Ensure the power switch on the rear panel is in the 'ON' position.
- Verify that the power outlet is functional.
- Check the fuse on the rear panel. If blown, replace it with a new one of the correct rating.
8.2 No Output
- Ensure the 'On/Off' button on the front panel is pressed to enable output.
- Check if OVP or OCP is triggered. Adjust the limits or clear the fault condition.
- Verify that the output terminals are correctly connected to the load.
- Ensure the set voltage and current values are appropriate for the load.
8.3 Unstable Output
- Check for loose connections in the output circuit.
- Ensure the load is within the specified operating range of the power supply.
- Verify that the ambient temperature is within the operating range (0-40°C).
9. User Tips
- For precise measurements, allow the device to warm up for at least 30 minutes before use.
- Utilize the memory function to quickly switch between frequently used voltage and current settings for different projects.
- When working with sensitive circuits, always set OVP and OCP limits slightly above your expected operating values to prevent accidental damage.
- The curve monitoring function is excellent for observing transient behavior or battery charging cycles.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your local OWON distributor or the seller. Keep your purchase receipt as proof of purchase.
11. Accessories
The following accessories are typically included with your OWON SPE Programmable DC Power Supply:
- Power Supply Main Device
- User Manual
- Power Cord
- USB Cable
- Test Leads (optional, may vary by package)
Figure 11.1: Product Accessories (Test Leads may be optional)
