Uni-T UT311A Vibration Tester

The Uni-T UT311A Vibration Tester is a professional-grade handheld instrument engineered for the precise measurement of vibration acceleration, velocity, and displacement. Designed to monitor the mechanical health of rotating machinery, motors, and various industrial equipment, this device provides essential data for predictive maintenance and troubleshooting. Featuring a high-resolution 2.4-inch TFT display with automatic screen rotation and a built-in flashlight, it ensures clear visibility and ease of operation in diverse industrial environments.

Advantages

This vibration tester offers exceptional versatility by providing three distinct measurement modes, allowing users to evaluate dynamic vibrations and overall machine condition with high accuracy. The inclusion of dual frequency modes for acceleration enables the detection of both low-frequency and high-frequency vibrations, ensuring comprehensive diagnostic capabilities. Its ergonomic, lightweight design, combined with a long-lasting rechargeable battery and convenient USB-C charging, makes it an ideal tool for field technicians who require reliable, portable equipment for routine inspections.

Suitable for

• Monitoring the condition of rotating machinery and motors
• Predictive maintenance in industrial manufacturing plants
• Troubleshooting mechanical vibrations in pumps and fans
• Routine field inspections of industrial equipment

When it may not be suitable

This device is not intended for use in highly corrosive or explosive environments where specialized intrinsically safe equipment is required. It is also not suitable for measuring vibrations in non-mechanical structures, such as civil engineering projects or building seismic analysis.

Key specifications

• Acceleration measurement range: 0.1–199.9 m/s²
• Velocity measurement range: 0.1–199.9 mm/s
• Displacement measurement range: 0.001–1.999 mm
• Acceleration frequency range: LO 10 Hz–1 kHz / HI 1 kHz–15 kHz
• Display: 2.4-inch TFT LCD with auto-rotation
• Battery: 1350 mAh Li-Ion, up to 12 hours of operation
• Charging interface: USB-C
• Weight: 191 g (with short probe)

How to use

To begin, attach the appropriate measurement probe—either the long or short version—to the device based on your access requirements. Power on the unit and select the desired measurement mode: acceleration, velocity, or displacement. Place the probe firmly against the surface of the machinery being tested, ensuring stable contact to obtain accurate readings. Use the Data Hold function to freeze the measurement on the screen if necessary for documentation. After completing your inspection, power off the device to conserve battery life.

What to consider before purchase

• Ensure the frequency range of the device matches the vibration characteristics of your specific machinery.
• Verify that the operating temperature and humidity conditions of your facility are within the specified limits.
• Consider the accessibility of the machinery to determine if the included probes are sufficient for your needs.

Usage recommendations

For the most accurate results, ensure the probe is held perpendicular to the surface being measured and maintain consistent pressure throughout the reading process. Regularly check the battery level and recharge via the USB-C port to ensure the device is ready for field use.