1. Introduction
The Jarhead SCO2 is a compact, multi-functional dual-channel digital portable oscilloscope designed for accurate signal measurements and analysis in various electronic applications. It features a 50M sampling rate, 10MHz analog bandwidth, and a 3.2-inch LCD display, making it suitable for tasks such as home appliance repair, mobile phone repair, automotive repair, and general electronic DIY projects.
Figure 1: Jarhead SCO2 Portable Oscilloscope
2. Safety Information
Please read and understand the following safety precautions before operating the device to prevent injury or damage to the instrument.
- Voltage Measurement: When measuring voltages exceeding 40V, ensure the probe is set to X10 mode.
- High Voltage Warning: When measuring high AC voltage (more than 30V AC), avoid touching the metal parts of the instrument, especially the BNC interface.
- Charging Voltage: The charging voltage should not exceed 6.8V to prevent damage to the charging chip.
- Mains Electricity: It is strictly prohibited to connect the oscilloscope to a computer when measuring mains electricity. This may cause a short circuit between the computer's neutral and ground.
Figure 2: Important Safety Warnings and Parameter Comparison
3. Package Contents
Verify that all items are present in your package:
- 1 x SCO2 Oscilloscope Host
- 1 x USB Cable
- 2 x Alligator Cables (or 1x Alligator Cable + 1x High Voltage Probe Cable, depending on package option)
Figure 3: Example of Product Package Contents
4. Device Layout and Controls
Familiarize yourself with the main components and controls of the SCO2 oscilloscope.
Figure 4: Front View of SCO2 Oscilloscope
- CH1 / CH2: BNC input connectors for Channel 1 and Channel 2.
- ON/OFF: Power switch.
- Menu: Accesses the main menu for settings and options.
- Flexo: Function button, context-dependent.
- Auto: One-click automatic waveform adjustment.
- Ok/Hold: Confirms selections or pauses/holds the waveform display.
- Left / Right: Navigation buttons for menu and waveform adjustments.
- + / -: Adjustment buttons for parameters like voltage scale, time base, etc.
Figure 5: Side View with USB Port
5. Setup and Basic Operation
5.1 Charging the Device
Connect the oscilloscope to a 5V USB power source using the provided USB cable. Ensure the charging voltage does not exceed 6.8V.
5.2 Powering On/Off
Press the ON/OFF button to power on or off the device.
5.3 Connecting Probes
Connect the alligator cables or high voltage probes to the CH1 and CH2 BNC input connectors. Ensure proper grounding for accurate measurements.
5.4 Automatic Waveform Adjustment (Auto Function)
After connecting your signal, press the Auto button. The oscilloscope will automatically adjust its settings (voltage scale, time base, trigger level) to display a stable waveform.
6. Operating Instructions
6.1 Waveform Measurement Display
The SCO2 supports various display modes for waveform analysis:
- Dual Channel Oscilloscope Mode: Displays waveforms from both CH1 and CH2 simultaneously.
- Lissajous Model (XY Mode): Used for phase difference measurements between two signals.
- Current Waveform Display: Specialized mode for visualizing current signals (0-6A range).
Figure 6: Waveform Measurement Display Examples
6.2 Triggering Functions
The oscilloscope offers complete triggering functions to stabilize repetitive waveforms and capture single-shot events:
- Single: Captures a single waveform event and then stops.
- Normal: Triggers only when the input signal meets the trigger conditions.
- Automatic: Triggers automatically even without a stable signal, useful for general observation.
Use the Menu and navigation buttons to adjust trigger settings.
6.3 Waveform Storage and Analysis
The device has a 20KB storage depth. You can use the menu options to save waveforms. It also supports waveform compression and expansion, allowing you to zoom in on specific details or view a broader overview of captured signals.
6.4 Firmware Upgrade and PC Software
The SCO2 supports firmware upgrades via PC software. Connect the device to a computer using the USB cable and follow the instructions provided with the PC software to update the firmware and access advanced features.
7. Specifications
Detailed technical specifications for the Jarhead SCO2 Digital Portable Oscilloscope:
| Feature | Specification |
|---|---|
| Model Number | SCO2 |
| Sampling Rate | 50M/1CH (50MSa/S) |
| Channels | 2 |
| Analog Bandwidth | 10MHz/Channels |
| Actual Bandwidth | 2MHz/Channels |
| Measuring Voltage | X1 (±40V), X10 (±400V) |
| Input Impedance | 1MΩ |
| Storage Depth | 20KB |
| Parameter Display | 12 kinds |
| Current Measurement | 0-6A |
| Minimum Accuracy (Current) | 2mA |
| Current Sampling Rate | 2.4KSa/S |
| Display | 3.2-inch LCD, 320*240 Pixels |
| Charging Voltage | 5V |
| Battery Capacity | 2500mAh |
| Continuous Working Time | 4.5-6H |
| Case Size | 120mm x 66mm x 18.5mm |
| DIY Supplies | Electrical |
| Certification | CE |
| Origin | Mainland China |
Figure 7: Functional Characteristics and Argument Table
8. Maintenance
To ensure the longevity and optimal performance of your SCO2 oscilloscope, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: Store the oscilloscope in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: For prolonged storage, ensure the battery is partially charged (around 50%) to maintain battery health. Avoid fully discharging the battery for extended periods.
- Probe Care: Handle probes carefully. Avoid bending or stressing the cables and connectors.
9. Troubleshooting
If you encounter issues with your SCO2 oscilloscope, refer to the following common problems and solutions:
- Device does not power on:
- Ensure the battery is charged. Connect the device to a 5V USB power source.
- Check if the ON/OFF switch is fully engaged.
- No waveform displayed or waveform is unstable:
- Ensure probes are correctly connected to the input channels and the circuit under test.
- Press the Auto button for automatic setup.
- Check probe settings (X1/X10) match the actual probe used and the voltage being measured.
- Adjust the time base and voltage scale manually if Auto function doesn't yield a stable display.
- Verify the trigger settings (Mode, Level) are appropriate for the signal.
- Inaccurate measurements:
- Ensure probes are properly calibrated (if applicable).
- Check for proper grounding of the oscilloscope and the circuit.
- Verify the input impedance setting is correct.
- Device freezes or becomes unresponsive:
- Try restarting the device by holding the ON/OFF button.
- If the issue persists, consider performing a firmware update via PC software.
10. User Tips
Here are some general tips to enhance your experience with the SCO2 oscilloscope:
- Always start with the Auto function when connecting a new signal to quickly get a visible waveform.
- For precise measurements, manually adjust the time base and voltage scale after using the Auto function.
- Utilize the waveform compression and expansion features to analyze both overall signal behavior and fine details.
- Keep the firmware updated to benefit from new features and performance improvements.
11. Warranty and Support
For warranty information and technical support, please refer to the seller's policies or contact the point of purchase. Keep your proof of purchase for any warranty claims.
