Metrologi och mätning. Fysikaliska fenomen

Kommittébeteckning: SIS/TK 500 (Halksäkerhet)
Källa: CEN
Svarsdatum: den 15 jun 2020
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This document specifies test methods for the determination of the slip resistance of surfaces in the most commonly encountered situations in which pedestrians walk. NOTE It is also possible to use this document for measurements where persons might walk on trafficked areas.

Kommittébeteckning: SIS/TK 254 (Järnväg, tunnelbana och spårväg)
Källa: CEN
Svarsdatum: den 18 jun 2020
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This document specifies laboratory test procedures to determine a high-frequency dynamic stiffness, "acoustic stiffness", of resilient components. The purpose is to provide data for assessment and specification of the acoustic performance of track components.

This document is applicable to complete track fastening assemblies and to pad components of fastening systems including both discrete and continuous fastening systems.

It is applicable to specimens of a single rail seat fastener.

It is applicable to the measurement of the dynamic transfer stiffness under a prescribed pre-load and the associated hysteretic damping loss factor.

It provides measurement methods and pre-load, excitation and frequency range conditions for application to ground borne and structure borne noise as well as for rolling noise.

It is not applicable to the measurement of the stiffness of pads and fastening assemblies under static or low frequency dynamic loading used for track mechanics and which is specified in EN 13146-9.

Kommittébeteckning: SIS/TK 116 (Oorganiska ytbeläggningar)
Källa: ISO
Svarsdatum: den 30 jun 2020
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This standard deals with ellipsometry, a method for determining optical and dielectric constants in the UV-VIS-NIR spectral range as well as layer thicknesses in the field of at-line production control, quality assurance and material development through accredited test laboratories, preferably for stand-alone measuring systems with special regard to ISO/IEC Guide 98-3 conforming presentation of the uncertainty of results.