What is EN ISO 11681-4:2016

The international standard EN ISO 11681-4:2016, titled "Measurement of Vibration and Shock - Hand-Arm Vibration - Method for Evaluation of Vibration Containing Multiple Shocks," provides guidelines for evaluating the vibration and shock effects on the hand-arm system. This technical article delves into the key aspects and significance of this standard.

Understanding Vibration and Shock

Vibration and shock are two physical phenomena that can have detrimental effects on human health and performance, particularly when individuals are exposed to them for extended periods. Vibration refers to the oscillatory motion of an object, while shock refers to the sudden jolt or impact experienced by the body. In the context of hand-arm vibration, these mechanical stimuli can originate from various tools and equipment, such as power tools, chainsaws, and pneumatic hammers.

The Importance of Evaluating Hand-Arm Vibration

Evaluation of hand-arm vibration is crucial to assess the potential risks faced by workers who utilize vibrating machinery in their daily tasks. Prolonged exposure to excessive vibration levels can lead to a range of health issues, collectively referred to as Hand-Arm Vibration Syndrome (HAVS). Symptoms may include numbness, tingling, pain, and reduced dexterity in the hands and arms. By adhering to the guidelines provided in EN ISO 11681-4:2016, employers can accurately evaluate the vibration levels emitted by the machinery and take appropriate measures to mitigate any risks.

The Methodology Outlined in EN ISO 11681-4:2016

This international standard outlines a comprehensive methodology for measuring and evaluating hand-arm vibration containing multiple shocks. It provides guidelines for selecting suitable accelerometer types, preamplifiers, and signal conditioning equipment for accurate measurements. Additionally, it specifies the calculation procedures to determine relevant parameters such as frequency weighting, averaging methods, and shock measurement indicators.

EN ISO 11681-4:2016 also emphasizes the importance of considering vibration emitted by multiple sources or tools operating simultaneously. The standard provides a methodology for calculating the combined vibration exposure, enabling a comprehensive assessment of the actual risks faced by workers in real-world scenarios.

In conclusion, EN ISO 11681-4:2016 is an essential international standard for evaluating hand-arm vibration containing multiple shocks. By following the guidelines outlined in this standard, employers can ensure the safety and well-being of their workers who are exposed to vibrating machinery. Implementing effective control measures based on accurate evaluations plays a vital role in reducing the risks associated with prolonged hand-arm vibration exposure.