Does laboratory environmental micro-vibration affect precision equipment accuracy?

Yes. Environmental micro-vibration may come from floor structure, nearby equipment operation, noise, personnel movement, or transport vehicles. For high-precision laboratories, semiconductor processes, electronic manufacturing, and optical measurement equipment, micro-vibration may cause measurement errors, uncertain test results, reduced equipment performance, or lower accuracy.

Why should environmental micro-vibration be measured before installing precision instruments?

Measuring environmental micro-vibration before installation helps confirm whether the planned installation location meets the dynamic stability required by the equipment. Identifying a suitable location in advance can reduce installation time, lower later vibration isolation improvement costs, and prevent accuracy loss caused by environmental vibration.

VC-Curve is a commonly used micro-vibration evaluation standard for precision equipment and laboratory environments. It helps determine whether vibration velocity in different frequency ranges meets equipment requirements. By using VC-Curve, environmental vibration conditions at different locations can be classified to support equipment installation planning.

How does VMS-EM perform environmental micro-vibration measurement?

The VMS-EM Environmental Micro-Vibration Analyzer can be used with sensors and directional adapters to measure environments planned for precision equipment installation. Measurements can be displayed in a 1 to 100 Hz 1/3 Octave Band, using vibration velocity in um/s RMS, while synchronously measuring X, Y, and Z three-axis environmental micro-vibration.

Case

Application

FAQ

Support

Does Environmental Micro-Vibration Affect Equipment Accuracy?

Q: What do VC-D, VC-E, and Operating Theatre levels mean?

The Operating Theatre level represents vibration that is difficult to perceive and is typically suitable for operating rooms, 100x microscopes, and low-sensitivity equipment. VC-D is often used for demanding equipment such as SEM, TEM, and electron beam systems. VC-E can meet stricter sensitive system requirements, such as long-path laser systems, nanometer-level electron beam lithography, and highly dynamically stable equipment.

Q: How can the impact of environmental micro-vibration on laboratory equipment be reduced?

Methods include using vibration isolation devices such as air-floating tables and spring isolators, properly installing and fixing mechanical equipment, keeping precision instruments away from vibration sources or traffic routes, regularly monitoring environmental vibration, and maintaining vibration isolation and anti-vibration facilities to ensure long-term stable operation of precision equipment.

Case｜Does Environmental Micro-Vibration Affect Equipment Accuracy？

Using the VC-Curve classification standard to plan and position precision instruments helps to avoid performance degradation or decreased accuracy caused by environmental micro-vibrations, thereby preventing unnecessary cost increases.

Environmental Micro-Vibration

Environmental micro-vibration refers to the extremely small vibrations generated in natural environments or within buildings. These vibrations can originate from factors such as the structural strength of factory floors, the operation of equipment, the influence of other machinery, noise within the facility, or vibrations caused by personnel and transport vehicles moving around. Some industries that are highly sensitive to such vibrations include:

Electronics Manufacturing: Environmental micro-vibration can lead to poor soldering of electronic components, which in turn affects the quality and reliability of electronic products. Testing electronic components in an environment with abnormal micro-vibrations can also become challenging, as vibrations may interfere with the proper operation of testing equipment.

Research Laboratories: In environments requiring high-precision experiments, micro-vibrations can introduce uncertainties in experimental results, affecting research accuracy. Vibrations may also reduce the precision of scientific instruments, impacting the reliability of experiments.

Semiconductor Industry: In semiconductor manufacturing, micro-vibrations can affect the stability of photolithography equipment. Photolithography is a high-precision process used to transfer patterns onto semiconductor wafers. Micro-vibrations can cause misalignment of the photolithography equipment, leading to inaccuracies in pattern positioning and affecting wafer manufacturing precision. Additionally, micro-vibrations can impact the stability of the Chemical Vapor Deposition (CVD) process, which is used to deposit thin films onto wafers. Vibrations can lead to uneven gas distribution, affecting the uniformity of the deposited layers and ultimately impacting the quality and performance of the wafers.

Therefore, conducting pre-installation environmental assessments helps prevent performance degradation or accuracy issues caused by environmental vibrations, reducing unnecessary costs.

To avoid or mitigate the impact of environmental micro-vibrations, the following measures can be considered:

Vibration Isolation Technology: Utilize vibration isolation devices such as air flotation tables and spring isolators to reduce the transmission of external vibrations to equipment or experiments. These technologies effectively isolate ground vibrations and enhance equipment stability.

Proper Installation of Machinery: Ensure that machinery is properly installed and securely fixed to minimize vibrations generated during operation. Positioning equipment away from vibration sources, such as heavy machinery, helps reduce external interference.

Environmental Vibration Monitoring: Implement an environmental monitoring system to regularly measure and record the levels of micro-vibrations. This helps identify vibration sources and enables appropriate control measures.

Regular Equipment Maintenance: Conduct regular inspections and maintenance of isolation devices and other anti-vibration facilities to prevent excessive abnormal vibrations caused by mechanical operations and ensure normal functioning.

Monitoring Description

VMS-EM Environmental Micro-Vibration Detection Analyzer
The VMS-EM Environmental Micro-Vibration Detection Analyzer, combined with sensors and directional adapters, measures the environment of intended precision equipment to confirm whether the micro-vibration quality meets the required standards and helps identify the most suitable installation location.

Measurement Conditions

Position A: Operating Theatre Level

Position B: VC-E Level

Position C: VC-D Level

Environmental Micro-Vibration Measurement Levels
• Frequency: 1~100 Hz (1/3 Octave Band Display)
• Unit: Vibration velocity um/s (RMS)
• Duration: 60-second average
• Directions: X, Y, Z axes

Measurement Standard: VC-Curve Micro-Vibration Specification
Measurement Contents: Predefined Measurement Positions A, B, and C

Measurement Conclusions

Position A - Operating Theatre Level: Vibrations are hardly noticeable, making it suitable for most operating rooms, suites, 100x microscopes, and other low-sensitivity equipment.

Position B - VC-E Level: Adequate for the most demanding sensitive systems, including long-path, laser-based small target systems, nanometer-scale electron beam lithography systems, and other applications requiring exceptional dynamic stability.

Position C - VC-D Level: Generally suitable for stringent equipment requirements, including many scanning electron microscopes (SEM and TEM) and electron beam systems.

Based on these results, users can plan the placement of their equipment according to the measured vibration levels at different locations.

By confirming the suitability of the installation environment in advance, installation time and potential vibration mitigation issues can be reduced. The VMS-EM Environmental Micro-Vibration Detection Analyzer is specifically designed to assess micro-vibration levels in factory environments, helping users find the most suitable installation locations.

VMS-EM Environmental Micro-Vibration

VMS-EM

Environmental Micro-Vibration Monitoring

FAQ

Does laboratory environmental micro-vibration affect the accuracy of precision equipment?
Yes. Environmental micro-vibration may come from floor strength, surrounding equipment operation, noise, personnel walking, or moving transport vehicles. For high-precision laboratories, semiconductor manufacturing, electronic manufacturing, and optical measurement equipment, micro-vibration can cause measurement errors, uncertain experimental results, poor equipment performance, or decreased accuracy.

Why conduct environmental micro-vibration testing before installing precision instruments?
Conducting environmental micro-vibration testing before installing precision instruments can confirm whether the designated installation location meets the dynamic stability required by the equipment. Finding a more suitable location before installation can reduce installation time, lower subsequent vibration isolation improvement costs, and avoid equipment accuracy degradation caused by environmental vibration.

What is the VC-Curve?
The VC-Curve (Vibration Criteria) is a micro-vibration evaluation standard commonly used for precision equipment and laboratory environments. It is used to determine whether the vibration velocity in different frequency ranges meets the equipment's requirements. Through the VC-Curve, the environmental vibration status of different locations can be graded, assisting users in planning equipment placement.

How does VMS-EM conduct environmental micro-vibration testing?
The VMS-EM environmental micro-vibration analyzer, combined with sensors and directional mounting blocks, can measure the designated environment for installing precision equipment. During measurement, a 1~100 Hz 1/3 Octave Band display can be used, with vibration velocity in um/s RMS, and synchronously measure environmental micro-vibrations in the X, Y, and Z triaxial directions.

What do the VC-D, VC-E, and Operating Theatre criteria represent?
The Operating Theatre criterion means vibration is generally barely perceptible, typically suitable for operating rooms, 100x microscopes, and low-sensitivity equipment. The VC-D criterion is often used for demanding equipment, such as SEM, TEM, and electron beam systems. The VC-E criterion satisfies even more demanding sensitive systems, such as long-path laser systems, nanoscale electron beam lithography, and highly dynamically stable equipment.

How to reduce the impact of environmental micro-vibration on laboratory equipment?
Methods to reduce environmental micro-vibration include using vibration isolation devices such as air suspension tables and spring isolators, properly installing and fixing mechanical equipment, staying away from equipment or moving paths that may generate vibration, regularly monitoring environmental vibration, and maintaining vibration isolation devices and anti-vibration facilities to ensure the long-term stable operation of precision equipment.