1. Introduction
The OWON SPM Series is a single-channel switching DC power supply and multimeter designed for laboratory and professional use. It features a constant power design, a wide application range, and flexible configuration of voltage and current within its rated power range. This device integrates a high-resolution multimeter for precise measurements and supports PC communication for advanced programming and control.
The SPM series is suitable for various applications including battery charging, aging tests, and phone/laptop repair.
2. 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.
- This device operates at high voltage (above 50Vac or 75Vdc). Exercise extreme caution.
3. Package Contents
Please check the package contents upon receipt to ensure all items are present and undamaged:
- 1 x Main Device (Programmable DC Power Supply)
- 1 x Quick Guide
- 1 x Power Cord
- 1 x Multimeter Lead
- 1 x Ground Wire
- 1 x Fuse
- 1 x User Manual (English)
4. Device Overview
4.1 Front Panel
- Voltage Setting / AC or DC Voltage Switch: Used to adjust voltage and switch between AC/DC voltage modes for the multimeter.
- Current Setting / AC or DC Current Switch: Used to adjust current and switch between AC/DC current modes for the multimeter.
- Over Voltage Protection (OVP), Over Current Protection (OCP) / Multimeter Functions: Activates OVP/OCP, and switches between resistance, capacitance, diode, and continuity measurement types for the multimeter.
- Display Modes Switch: Toggles between different display modes.
- DC Power Supply or Multimeter Mode Switch: Switches the device between DC power supply and Multimeter modes.
- Adjustment Knob: Used for fine-tuning settings.
- Channel Output On/Off Button: Controls the output of the channel. Long press to activate the automatic output function.
- Front USB Port: Provides 5V/1A output for charging or powering external devices.
- Multimeter Voltage and Current Measurement Sockets: Red is positive, black is negative.
- Channel Output Terminals: For connecting the power supply output.
4.2 Rear Panel
- Intelligent Temperature Control Fan: Manages device temperature.
- Power Cord Socket: For connecting the main power cable.
- Fuse: Overcurrent protection for the device.
- Power Switch: Turns the device on/off.
- USB Device Communication Port: Supports SCPI communication protocol for PC control and firmware updates.
5. Setup
5.1 Initial 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 and then to a grounded AC power outlet.
- For PC control, connect the USB device communication port on the rear panel to your computer using a USB cable.
- If using the multimeter function, connect the multimeter leads to the appropriate sockets on the front panel.
- Turn on the power switch on the rear panel. The device will power on and display the main interface.
5.2 PC Software Setup
To utilize PC programming features, you need to install the USB driver and PC software.
- Connect the device to your PC via the rear USB device port.
- Install the USB driver for the first time use. The driver is typically found in the software package provided or on the manufacturer's website.
- Turn on the PC software (e.g., "DC Power Supply Control").
- In the software, navigate to "Communication Settings" and select "Serial Communication".
- Configure the serial port parameters (Port, Baud, DataBits, StopBits, Parity) as required and click "Open" to establish connection.
6. Operation
6.1 Power Supply Interface
The 2.8-inch TFT LCD displays various information simultaneously:
- Cumulative running time
- Actual output power
- Channel output status (CV: Constant Voltage, CC: Constant Current)
- Actual output voltage
- Actual output current
- Set values of OVP/OCP
6.2 Multimeter Interface
The integrated 4½ digit multimeter can measure voltage, current, resistance, capacitance, diode, and continuity. The multimeter interface displays:
- Measurement type
- Measurement range (Auto range or manual range)
- Measured value
- Bar chart for visual representation
6.3 Programmable Output (List Waveform Edit)
The device supports list waveform editing output, allowing you to define up to 10 groups of timing output. The PC software allows for up to 100 editable points for a set of waveform.
- In the PC software, select "List waveform Edit".
- Click "Edit" to open the waveform editor.
- You can select the number of edit points (Start and End) and the cycle count.
- For each point, you can set the output voltage (V), output current (A), waveform duration (Delay in S), and whether four parameters are selected for that point (Y/N).
- After configuring the waveform, click "Start" to output the expected waveform according to the editing time sequence.
6.4 Memory Functions
The device features 4 groups of Memory shortcut parameters for quick output. These can be accessed and recalled directly from the front panel or via the PC software.
6.5 Protection Features
The SPM series includes multiple protection functions to safeguard your circuit and the device:
- Over Voltage Protection (OVP): Prevents output voltage from exceeding a set limit.
- Over Current Protection (OCP): Prevents output current from exceeding a set limit.
- Constant Voltage (CV) / Constant Current (CC) Intelligent Switching Mode: Automatically switches between CV and CC modes to protect the circuit. When the actual current exceeds the preset current value, the power supply automatically switches to CC mode.
- Thermal Protection: Protects the device from overheating.
- Short Circuit Protection: Guards against damage from short circuits.
7. Specifications
7.1 General Specifications
| Parameter | Description |
|---|---|
| Display | 2.8 inch color LCD (240x320 pixels) |
| Interface | USB Device, USB Host (5V/1A) |
| Working Temperature | 0-40°C |
| Dimensions (W×H×D) | 82mm × 142mm × 226mm |
| Weight | Approx. 1.5kg |
7.2 DC Power Specifications
The instrument must be operated continuously for more than 30 minutes at the specified temperature to ensure the following parameters.
| Model | SPM3051 | SPM6053 | SPM3103 | SPM6103 |
|---|---|---|---|---|
| Channel Output | 30V/5A | 60V/5A | 30V/10A | 60V/10A |
| Total Output Power | 150W | 300W | 300W | 300W |
| Load Regulation (Voltage) | ≤30mV | |||
| Load Regulation (Current) | ≤20mA | |||
| Power Regulation (Voltage) | ≤30mV | |||
| Power Regulation (Current) | ≤20mA | |||
| Setting Resolution (Voltage) | 10mV | |||
| Setting Resolution (Current) | 1mA | |||
| Readback Resolution (Voltage) | 10mV | |||
| Readback Resolution (Current) | 1mA | |||
| Value Resolution (25℃±5℃) (Voltage) | ≤0.1% ± 20mV | ≤0.1% ± 30mV | ||
| Value Resolution (25℃±5℃) (Current) | ≤0.05% ± 10mA | |||
| Readback Value Resolution (25℃±5℃) (Voltage) | ≤0.1% ± 20mV | ≤0.1% ± 30mV | ||
| Readback Value Resolution (25℃±5℃) (Current) | ≤0.1% ± 10mA | |||
| Ripple/Noise (Voltage Vp-p) | ≤30mVp-p | ≤50mVp-p | ||
| Ripple/Noise (Voltage rms) | ≤3mVrms | ≤5mVrms | ||
| Ripple/Noise (Current rms) | ≤30mAp-p | |||
| Output Temperature Coefficient (Voltage) | 100ppm/°C | |||
| Output Temperature Coefficient (Current) | 200ppm/°C | |||
| Readback Temperature Coefficient (Voltage) | 100ppm/°C | |||
| Readback Temperature Coefficient (Current) | 200ppm/°C | |||
| Response Time (50%-100% rated load) | ≤1.0ms | |||
| Storage | 4 groups of data | |||
*Noise bandwidth 20MHz, ripple bandwidth 1MHz, connect 10uF electrolytic capacitor in parallel with 0.1uF ceramic capacitor to the output terminal for testing.
7.3 Multimeter Specifications
| Parameter | Description |
|---|---|
| Full Scale Reading | 4½ digits |
| Auto Range | Yes |
| Measure | Voltage, Current, Capacitance, Resistance, Continuity, Diode (0-2V) test |
| Capacitance | 20.000nF, 200.00nF, 2.0000uF, 20.000uF, 200.00uF, 2.0000mF: ±(3.0%±10digit) |
| DC Voltage (DCV) | 200.00mV: ±(0.3%+10digit), 2.0000V, 20.000V, 200.00V, 1000V: ±(0.3%±5digit) |
| AC Voltage (ACV) | 200.00mV, 2.0000V, 20.000V, 200.00V: ±(0.8%+10digit) 750V: ±(1%±10digit) |
| DC Current (DCA) | 200.00mA: ±(0.8%+10digit), 10.000A: ±(2.5%±10digit) |
| AC Current (ACA) | 200.00mA: ±(1%±10digit), 10.000A: ±(2.8%±10digit) |
| Impedance | 200.00Ω, 2.0000kΩ, 20.000kΩ, 200.00kΩ, 2.0000MΩ: ±(0.8%±10digit), 20.000MΩ: ±(1%±3digit), 100MΩ: ±(5%±10digit) |
8. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures (-20℃~60℃). Ensure relative humidity is ≤90%RH and there is no condensation.
- Fuse Replacement: If the fuse blows, replace it with a fuse of the same type and rating (e.g., 250V, F5A for 200-240V AC input). Refer to qualified personnel for replacement if unsure.
- Ventilation: Ensure the intelligent temperature control fan and ventilation openings on the rear and sides are not obstructed to prevent overheating.
9. Troubleshooting
- No Power: Check the power cord connection, the power switch on the rear panel, and the fuse. Ensure the power outlet is functional.
- No Output: Verify that the channel output is turned ON. Check for active OVP/OCP protection and ensure output parameters are set correctly.
- PC Software Connection Issues: Ensure the USB driver is correctly installed and the serial communication settings (Port, Baud rate) in the software match your system configuration.
- Unexpected Output: If the output is not as expected during programmed waveform generation, review the list waveform edit parameters for any errors in voltage, current, or delay settings.
10. User Tips
- Utilize the 4 groups of Memory shortcut parameters for frequently used output settings to save time during repetitive tasks.
- When performing sensitive measurements or tests, ensure the device is properly grounded to minimize noise and ensure accurate results.
- For long-duration tests, monitor the device's temperature and ensure adequate ventilation to prevent thermal shutdown.
- The 5V/1A front USB port is convenient for powering small USB devices or charging mobile phones directly from the power supply.
11. Warranty and Support
For detailed warranty information, technical support, or service inquiries, please refer to the official user manual PDF available at OWON SPM Series User Manual (PDF) or contact OWON customer service directly.
