1. Introduction
The OWON SPE3103 is a single-channel programmable DC power supply designed for laboratory and industrial applications. It features a compact design, high resolution (10mV / 1mA), and a 2.8-inch TFT LCD display for clear readings. This power supply offers a list waveform editing output function, allowing for up to 10 groups of timing outputs. It incorporates low ripple/noise characteristics, along with essential protection features such as over voltage protection (OVP) and over current protection (OCP). The unit also includes output voltage and current curve monitoring, intelligent temperature-controlled fan cooling, and a USB communication interface supporting SCPI commands.
2. Safety Instructions
Please read and understand these safety instructions before operating the OWON SPE3103 power supply. Failure to comply may result in injury or damage to the instrument.
- Grounding: Always connect the power supply to a properly grounded AC power outlet to prevent electric shock.
- Power Source: Ensure the input voltage matches the rating specified on the rear panel of the instrument.
- Ventilation: Do not block the ventilation openings. Ensure adequate airflow around the unit to prevent overheating.
- Environment: Operate the instrument in a dry, well-ventilated area, away from direct sunlight, high temperatures, humidity, and corrosive gases.
- Liquid Contact: Avoid exposing the instrument to liquids. Do not operate with wet hands.
- Servicing: Do not attempt to open or service the instrument yourself. Refer all servicing to qualified personnel.
- Fuse: Replace fuses only with the specified type and rating.
3. Package Contents
Verify that all items listed below are present in the package:
- 1 x OWON SPE3103 Power Supply Main Device
- 1 x Power Cord
- 1 x User Manual (this document)
- 1 x Fuse
- 1 x Test Leads
4. Product Overview
4.1 Front Panel
The front panel features the 2.8-inch TFT LCD display, control buttons, a rotary encoder, and output terminals.
Image Description: This image displays the front panel of the OWON SPE3103 power supply. It shows the main display screen indicating voltage and current readings, control buttons for voltage (V), current (I), OVP, OCP, Display, Memory, and On/Off. A rotary encoder is visible on the right side. Below the display are the 5V 1A USB charging port and the red (positive), green (ground), and black (negative) output terminals.
4.2 Rear Panel
The rear panel includes the AC power input, fuse holder, power switch, and cooling fan.
Image Description: This image shows the rear panel of the OWON SPE3103 power supply. It features a prominent cooling fan grille, an AC power input socket, a fuse holder, and a main power switch. A warning label regarding electrical shock and grounding is also visible.
4.3 Dimensions
The unit has a compact form factor, with approximate dimensions of 82mm (Width) x 142mm (Height) x 226mm (Length).
Image Description: This image illustrates the dimensions of the OWON SPE3103 power supply, showing its width (82mm), height (142mm), and length (226mm). An internal view of the power supply's circuit board is also depicted, highlighting its internal components.
5. Setup
5.1 Power Connection
- Ensure the main power switch on the rear panel is in the OFF position.
- Connect the provided power cord to the AC power input socket on the rear panel of the instrument.
- Plug the other end of the power cord into a properly grounded AC power outlet. Verify that the outlet voltage matches the instrument's rating (110Vac or 220Vac, as marked on the rear panel).
5.2 Connecting Test Leads
- Connect the red test lead to the red (positive) output terminal.
- Connect the black test lead to the black (negative) output terminal.
- If grounding is required for the connected load, use the green terminal.
- Connect the other ends of the test leads to your load or circuit, observing correct polarity.
6. Operating Instructions
6.1 Powering On/Off
- To power on, flip the main power switch on the rear panel to the ON position. The display will illuminate.
- To power off, flip the main power switch on the rear panel to the OFF position.
6.2 Setting Voltage and Current
- Press the V button to select voltage adjustment mode. The voltage setting on the display will become active.
- Rotate the rotary encoder to adjust the desired voltage value. Press the encoder to move between digits for fine adjustment.
- Press the I button to select current adjustment mode. The current setting on the display will become active.
- Rotate the rotary encoder to adjust the desired current limit. Press the encoder to move between digits.
- After setting, press the On/Off button (output control) to enable or disable the output. The display will show the actual output voltage and current when enabled.
6.3 Over Voltage Protection (OVP) and Over Current Protection (OCP)
The SPE3103 includes OVP and OCP functions to protect the connected load and the power supply itself.
- Press the OVP button to set the over voltage protection threshold. Use the rotary encoder to adjust the value.
- Press the OCP button to set the over current protection threshold. Use the rotary encoder to adjust the value.
- When an OVP or OCP event occurs, the output will be disabled, and an indicator will typically appear on the display.
6.4 Memory Functions
The power supply allows saving and recalling frequently used voltage and current settings.
- Press the Memory button to access memory functions.
- Follow the on-screen prompts to save current settings to a memory location or recall settings from a saved location.
6.5 List Waveform Editing Output
The SPE3103 supports editing and outputting up to 10 groups of timing sequences for voltage and current. Refer to the detailed programming guide (if available separately) for advanced configuration of list waveform outputs.
6.6 USB Communication
The unit features a USB communication interface for remote control and data logging, supporting the SCPI (Standard Commands for Programmable Instruments) protocol. Connect the power supply to a computer using a USB cable. Install the necessary drivers and software (available from the manufacturer's website) to utilize this feature.
7. Maintenance
7.1 Cleaning
To clean the instrument, disconnect it from the power source. Use a soft, damp cloth with a mild detergent. Do not use abrasive cleaners or solvents. Ensure no liquid enters the instrument.
7.2 Fuse Replacement
If the power supply does not turn on, the fuse may need replacement. Disconnect the power cord from the AC outlet. Locate the fuse holder on the rear panel. Use a suitable tool to open the fuse holder, remove the old fuse, and replace it with a new fuse of the identical type and rating (e.g., 250V, F5A for 220Vac input or 250V, F10A for 110Vac input, as specified on the unit). Close the fuse holder securely.
8. Troubleshooting
This section addresses common issues you might encounter with the SPE3103 power supply.
- No Power:
- Check if the power cord is securely connected to both the instrument and the AC outlet.
- Ensure the main power switch on the rear panel is in the ON position.
- Verify the AC outlet is functional.
- Check and replace the fuse if necessary (refer to Section 7.2).
- No Output Voltage/Current:
- Ensure the output is enabled by pressing the On/Off button on the front panel.
- Check if OVP or OCP has been triggered. Reset if necessary.
- Verify that the test leads are correctly connected to the output terminals and the load.
- Ensure the set voltage and current limits are appropriate for the connected load.
- Unstable Output:
- Check for loose connections in the test leads or load.
- Ensure the load is within the power supply's operating range.
- Verify proper ventilation to prevent overheating.
9. Specifications
The following table details the technical specifications for the OWON SPE3103 Programmable DC Power Supply. The instrument must be operated continuously for more than 30 minutes at the specified operating temperature to achieve these specifications.
| Category | Parameter | SPE3103 |
|---|---|---|
| Input Characteristics | Supply Voltage | 110Vac±15% or 220Vac±15% |
| Input Frequency | 45-65Hz | |
| Input Parameter 1 (110Vac±15%) | ||
| Input Voltage Range | 93-127Vac | |
| Full Load Input Current | ≤5.6A | |
| No-Load Input Current | ≤300mA | |
| Input Fuse | 250V,F10A | |
| Input Parameter 2 (220Vac±15%) | Input Voltage Range | 187-253Vac |
| Full Load Input Current | ≤2.8A | |
| No-Load Input Current | ≤150mA | |
| Input Fuse | 250V,F5A | |
| Rated Output | Voltage | 0-30V |
| Current | 0-10A | |
| Power | 300W | |
| Efficiency (110Vac, rated load) | 80% | |
| Regulation (CV) | Load | ≤30mV |
| Line | ≤20mV | |
| Efficiency (220Vac, rated load) | 85% | |
| Regulation (CC) | Load | ≤30mA |
| Line | ≤20mA | |
| 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) | Voltage (Vp-p) | ≤30mV |
| Voltage (rms) | ≤3mV | |
| Current (Ap-p) | ≤30mA | |
| Setting Resolution | Voltage | 10mV |
| Current | 1mA | |
| Readback Resolution | Voltage | 1mV |
| Current | 1mA | |
| Setting Accuracy | Voltage | ≤0.1%±20mV |
| Current | ≤0.1%±10mA | |
| Readback Accuracy | Voltage | ≤0.1%±20mV |
| Current | ≤0.1%±10mA | |
| Response time | Transient recovery time (50%-100% rated load) | ≤1ms |
| Protective function | OVP | 0-31V |
| OCP | 0-10.1A | |
| OTP | 85°C | |
| Temperature coefficient of output | Voltage | 100ppm/°C |
| Current | 200ppm/°C | |
| Temperature coefficient of readback value | Voltage | 100ppm/°C |
| Current | 200ppm/°C | |
| Display | Resolution | 240 × 320 pixels |
| Color | 65536 color, TFT | |
| Environment | Working Temperature | 0°C ~ 40°C |
| Storage Temperature | -20°C ~ 60°C | |
| Relative Humidity | ≤90%RH; no condensation | |
| Height | 2,000 meters | |
| Cooling | Fan cooling, temperature intelligent speed control | |
| Other | Communication Port | USB communication, compatible with SCPI communication protocol |
| USB Charging Port | 5V/1A USB charging | |
| Dimension | 82mm (Width) × 142mm (Height) × 226mm (Length) | |
| Weight | Approx. 1.5 kg |
Image Description: This section combines information from three images (512iIAsAuML.jpg, 51j+PwnHStL.jpg, 41MdcFYV4eL.jpg) to present a comprehensive technical specification table for the SPE3103 power supply. It details input characteristics, rated output, regulation, ripple & noise, resolution, accuracy, response time, protective functions (OVP, OCP, OTP), temperature coefficients, display features, environmental conditions, and other specifications like communication ports, USB charging, dimensions, and weight.
10. Warranty and Support
The OWON SPE3103 Programmable DC Power Supply is manufactured by LILLIPUT. For warranty information, technical support, or service inquiries, please contact the manufacturer or your authorized distributor. Retain your purchase receipt as proof of purchase for warranty claims.
