1. Introduction
The TOOLTOP OS-5C is a versatile five-channel digital oscilloscope designed for various signal analysis applications. It features a 1MHz bandwidth and a 3M sampling rate, making it suitable for R&D, teaching, and general electronic troubleshooting. This manual provides essential information for setting up, operating, and maintaining your OS-5C oscilloscope.

Figure 1: TOOLTOP OS-5C Digital Oscilloscope
2. Safety Information
Always observe the following safety precautions to prevent injury and avoid damage to the instrument:
- Do not operate the device in wet or damp conditions.
- Ensure proper ventilation to prevent overheating.
- Use only the specified power adapter and accessories.
- Do not attempt to open or modify the device. Refer all servicing to qualified personnel.
- Avoid exposing the device to extreme temperatures or direct sunlight.
3. Package Contents
Verify that all items are present in your package:
- TOOLTOP OS-5C Digital Oscilloscope Unit
- USB Cable
- User Manual (this document)
- Optional: 5PCS Oscilloscope Probes (if purchased with this option)

Figure 2: Optional 5PCS Oscilloscope Probes
4. Device Overview
The OS-5C features a 4.3-inch IPS screen for clear waveform display and intuitive controls. It supports both USB and optional Wi-Fi connectivity for data transfer and remote operation.

Figure 3: Button Functions and Ports
Button Functions:
- ON-OFF button: Powers the device on or off.
- F1-F4 buttons: Function buttons, context-sensitive based on the current screen.
- Navigation buttons (6 buttons on the right):
- Up/Down arrows: Quick access to voltage adjustment and input selection screens.
- Left/Right arrows: Quick access to the time domain adjustment screen.
- Enter/Back buttons: For menu navigation and selection.
- USB Port: For data transfer and charging.
- RESET button: To reset the device if needed.
- CH1-CH5: 5-channel signal input ports.
5. Setup
5.1 Initial Power On
- Ensure the device is fully charged or connected to a power source via the USB port.
- Press and hold the ON-OFF button to power on the oscilloscope.
- The 4.3-inch IPS screen will display the boot-up sequence and then the main waveform interface.
5.2 Connecting Probes
- Connect the oscilloscope probes to the desired CH1-CH5 input ports on the top of the device.
- Ensure a secure connection for accurate readings.
5.3 PC/Mobile App Connection (Optional Wi-Fi Version)
The Wi-Fi version of the OS-5C supports dual-mode operation, allowing connection to a PC via USB or wirelessly to a PC/mobile app via Wi-Fi.

Figure 4: Dual Mode Operation (USB + WiFi)
- USB Connection: Connect the oscilloscope to your computer using the provided USB cable. Install the necessary PC software (if applicable) to view and analyze data.
- Wi-Fi Connection: For Wi-Fi enabled models, activate the Wi-Fi function on the oscilloscope. Connect your PC or mobile device to the oscilloscope's Wi-Fi network (or connect the oscilloscope to your local Wi-Fi network, depending on the mode). Use the dedicated mobile app or PC software for wireless control and data streaming.
6. Operating Instructions
6.1 Basic Waveform Display
After connecting probes and powering on, the screen will display real-time waveforms from the active channels. Use the navigation buttons to adjust the time base and voltage scales.

Figure 5: Multi-channel Waveform Display
6.2 5-Channel Synchronous Monitoring
The OS-5C supports simultaneous analysis of multiple signals across its five channels. This feature helps reduce equipment switching time and improves troubleshooting efficiency, especially in complex circuits.

Figure 6: 5-Channel Synchronous Monitoring
6.3 Multiple Measurement Modes
The oscilloscope offers various measurement modes, including YT/XY and Rolling mode, to cover routine analysis requirements. It supports 10 parameter measurements:
- Frequency (FREQ)
- Peak-to-peak Voltage (Vp-p)
- Average Voltage (AVG)
- Root Mean Square (RMS)
- Duty Cycle (DUTY)
- And others.

Figure 7: Multiple Measurement Modes (X-Y Mode, Cursor Measurement, Parameter Measurements)
6.4 Low-frequency Signal Analysis
The OS-5C is capable of supporting low-frequency signals such as audio and sensor outputs, with a maximum sampling rate of 3MHz. This makes it suitable for various R&D and teaching purposes.

Figure 8: Low-frequency Signal Analysis
6.5 Data Recording & Analysis
The device offers 8M x 5 channel storage. With the computer software, you can record waveform data for up to 90 hours at a time. The software also supports automatic calculation of parameters for in-depth analysis.

Figure 9: Data Recording and Analysis via PC Software
7. Maintenance
7.1 Cleaning
- Wipe the device with a soft, dry cloth.
- Do not use abrasive cleaners or solvents.
- Keep the screen free from dust and fingerprints for optimal visibility.
7.2 Storage
- Store the oscilloscope in a cool, dry place away from direct sunlight and extreme temperatures.
- When not in use for extended periods, ensure the battery is partially charged (around 50%) to prolong its lifespan.
7.3 Battery Care
- The device uses a 3.7V/18650/2000mAh removable battery.
- Battery standby time is approximately 3 hours.
- Avoid fully discharging the battery frequently.
8. Troubleshooting
- Device does not power on:
- Check battery charge level. Connect to USB power.
- Ensure the ON-OFF button is pressed correctly.
- No waveform displayed:
- Verify probes are securely connected to both the device and the circuit under test.
- Check input settings (AC/DC coupling, voltage range) for the selected channel.
- Ensure the signal source is active.
- Unstable waveform:
- Adjust trigger settings (trigger type, level).
- Check probe compensation.
- PC/Mobile App connection issues:
- For USB, ensure drivers are installed and the cable is functional.
- For Wi-Fi, verify the oscilloscope's Wi-Fi is enabled and your device is connected to the correct network. Check app settings.
9. Specifications

Figure 10: Basic Parameters
| Feature | Specification |
|---|---|
| Screen | 4.3 inch IPS 480*272 |
| Channel number | 5 |
| Maximum sampling rate | 3MHz*3 / 1.5MHz*4 / 1.5MHz*5 |
| Bandwidth | 1MHz |
| Input Impedance | 1 MΩ/20pF |
| Input Coupling Selection | AC / DC |
| Maximum measured voltage | ±10V (X10: ±100V) |
| Maximum peak-to-peak voltage | 20V (X10: 200V) |
| Voltage range (PC software/Mobile APP) | 2mV/div ~ 2V/div |
| Voltage range (Screen) | 4mV/div ~ 4V/div |
| Time base range (PC software/Mobile APP) | 1uS/div ~ 1080S/div |
| Time base range (Screen) | 1uS/div ~ 4S/div |
| Depth of data recording (PC software) | 8M * 5CH / Up to 90 hours |
| Waveform display mode | YT / XY / ROLL |
| Vertical resolution | 8 bit |
| Trigger Type | Rising Edge / Falling Edge |
| Data show | periodicity, Frequency, Vp-p, Maximum, Minimum, Average, RMS, Amplitude, Duty Cycle, Pulse Width |
| Language | English / CN / Portugues / Espano |
| Port Type | USB TYPE-C |
| Operating voltage | 5V |
| Current consumption | <2A |
| Battery Specifications | 3.7V/18650 / 2000mAh / Removable |
| Battery standby time | <3 hours |
| Signal output | 1KHz |
| Radio frequency (Optional WiFi version required) | Wi-Fi 2.4G or 5G |
| Main unit size | 150mm * 100mm * 32mm |
| Net weight | 350g |
10. User Tips
- Language Settings: The device supports multiple languages including English, Chinese, Portuguese, and Spanish. You can change the language setting in the device's menu.
- For optimal performance, ensure probes are calibrated regularly, especially when switching between different measurement ranges.
- When using the PC software for data recording, ensure your computer has sufficient storage space for up to 90 hours of waveform data.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the seller's contact information or the official TOOLTOP website. Keep your purchase receipt as proof of purchase.





