MULTICOMP PRO MP720857 Handheld Oscilloscope User Manual

1. Introduction

The MULTICOMP PRO MP720857 is a versatile handheld digital oscilloscope designed for a wide range of applications, including outdoor maintenance, rapid on-site measurements, vehicle diagnostics, and power detection. This device integrates an oscilloscope, a multimeter, and a waveform generator into a single portable unit, offering comprehensive testing capabilities.

Key Features:

• 100MHz oscilloscope, multimeter, and waveform generator in one device.
• 3.5-inch high-resolution, high-contrast, color LCD display for clear outdoor visibility.
• Built-in lithium battery provides 3-6 hours of continuous operation.
• USB Type-C interface supports power bank charging and PC software connection.
• Self-calibration function for accurate measurements.
• SCPI support for secondary development and automation.
• 10,000 wfms/s waveform refresh rate.
• Maximum 8K record length.
• Multiple automatic measurement functions.
• One-key auto-set function for quick detection and debugging.
• Multimeter functions include voltage, current, resistance, diode, capacitance, and continuity testing.
• Maximum 750V AC, 1kV DC input voltage for multimeter.
• Independent input for multimeter and oscilloscope.
• Reading hold and relative measurement functions.
• Waveform generator outputs sine, square, ramp, pulse, and built-in special waveforms.
• 0.1Hz frequency resolution for waveform generator.
• 14-bit resolution, 12MSa/s high sampling rate for waveform generator.
• 8K waveform length for waveform generator.

2. Setup

2.1 Unpacking and Inspection

Carefully unpack the device and all accessories. Verify that all items listed in the 'Accessories' section (see Specifications) are present and undamaged. If any items are missing or damaged, contact your supplier immediately.

2.2 Charging the Battery

The device is equipped with a built-in lithium battery. Before initial use, it is recommended to fully charge the battery. Connect the device to a power source using the provided USB Type-C cable. The device supports charging via a power bank for convenience.

2.3 Initial Power On and Self-Calibration

Press the power button to turn on the device. It is advisable to perform a self-calibration function periodically or after significant temperature changes to ensure measurement accuracy. Refer to the on-screen menu for the self-calibration option.

2.4 Connecting to a PC

The device can be connected to a PC via the USB Type-C interface. This allows for data transfer and control using compatible PC software. Ensure the necessary drivers are installed on your computer if prompted.

3. Operating Instructions

3.1 Basic Operation

The MP720857 features a 3.5-inch LCD display and intuitive controls. Use the navigation buttons and function keys (F1-F4) to navigate through menus and adjust settings. The 'Auto' button provides a one-key auto-set function for quick signal detection and display optimization.

3.2 Oscilloscope Function

To use the oscilloscope, connect the probe to the desired test point and the device's oscilloscope input. Select the oscilloscope mode from the main menu. Adjust the horizontal scale (time/div) and vertical sensitivity (volts/div) as needed. The device supports various trigger types (Edge) and modes (Auto, Normal, Single) to capture stable waveforms. Utilize the automatic measurement functions for Period, Frequency, Mean, PK-PK, Max, Min, ΔV, ΔT, and ΔT&ΔV between cursors.

3.3 Multimeter Function

For multimeter measurements, connect the multimeter leads to the dedicated multimeter input terminals. Select the desired measurement mode (Voltage, Current, Resistance, Capacitance, Diode, Continuity) from the menu. The multimeter input is independent of the oscilloscope input, allowing for simultaneous use. The device offers reading hold and relative measurement functions.

3.4 Waveform Generator Function

The integrated waveform generator can output various waveforms including sine, square, ramp, pulse, and arbitrary waveforms. Select the waveform generator mode and configure the desired waveform type, frequency (0.1Hz resolution), and amplitude (20 mVpp - 5 Vpp). Connect the output to the circuit under test.

3.5 SCPI Commands

The MP720857 supports Standard Commands for Programmable Instruments (SCPI), enabling remote control and automation through a PC connection. This feature facilitates secondary development and integration into automated test systems. Refer to the detailed SCPI programming guide (if available separately) for command syntax and usage.

4. Maintenance

4.1 Cleaning

To clean the device, use a soft, dry cloth. For stubborn dirt, a slightly damp cloth with mild detergent can be used. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the casing or display. Ensure the device is powered off and disconnected from all power sources before cleaning.

4.2 Storage

When not in use for extended periods, store the device in a cool, dry place, away from direct sunlight, extreme temperatures, and high humidity. It is recommended to store the device in its soft bag to protect it from dust and physical damage. Ensure the battery is partially charged (around 50%) before long-term storage to prolong its lifespan.

4.3 Battery Care

To maximize battery life, avoid fully discharging the battery frequently. Recharge the battery when the low battery indicator appears. If the device will not be used for a long time, charge it every three months to prevent deep discharge.

5. Troubleshooting

• Device does not power on: Ensure the battery is charged. Connect the device to a power source using the USB Type-C cable and try again.
• No waveform displayed: Check probe connections. Ensure the input coupling (AC/DC/Ground) and vertical sensitivity are set appropriately for the signal. Use the 'Auto' function to automatically adjust settings.
• Inaccurate measurements: Perform a self-calibration. Check probe attenuation settings (1X, 10X, etc.) to match the physical probe.
• Multimeter readings are incorrect: Verify that the correct measurement mode is selected and that the leads are properly connected to the multimeter input terminals.
• PC software connection issues: Ensure the USB Type-C cable is securely connected. Check if the necessary drivers are installed on your PC.

If problems persist, refer to the official product support resources or contact the manufacturer/seller for assistance.

6. Specifications

6.1 Performance Specifications (MP720857)

6.2 Multimeter & Waveform Generator Specifications, and Accessories

Multimeter Specifications (Standard)

Waveform Generator Specifications (Only for MP720857)

• Sampling Rate: 125MSa/s
• Channel: 1CH
• Amplitude Range: 20 mVpp - 5 Vpp
• Waveform Length: 8K
• Vertical Resolution: 14bits
• Output Impedance: 50Ω

Accessories

• Quick Guide
• USB Cable
• Probe adjust
• Multimeter Lead
• Soft Bag
• Bolt Driver
• Probe
• BNC to Alligator Clip

Part Number Table

7. User Tips

• Optimize Battery Life: For prolonged outdoor use, consider carrying a compatible power bank to extend the operational time of the device via its USB Type-C port.
• Regular Calibration: To maintain measurement accuracy, especially in environments with varying temperatures, perform the self-calibration function regularly.
• Probe Matching: Always ensure the probe attenuation setting on the oscilloscope matches the physical attenuation factor of the probe being used (e.g., 1X, 10X) to get correct voltage readings.
• Utilize Auto-Set: When encountering an unknown signal, the 'Auto' button can quickly provide a stable and viewable waveform, saving time on manual adjustments.

8. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact your authorized MULTICOMP PRO dealer or the manufacturer directly. Keep your proof of purchase for warranty claims.