Metrologi och mätning. Fysikaliska fenomen

Kommittébeteckning: SIS/TK 189 (Innemiljö och energianvändning i byggnader)
Källa: CEN
Svarsdatum: den 18 nov 2018
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This document specifies definitions, requirements and test methods for thermostatic radiator valves referred to hereafter as thermostatic valves.

This standard applies to two port thermostatic valves with or without pre-setting facility and thermostatic integrated valves with or without pre-setting facility for fitting to radiators in wet central heating installations up to a water temperature of 120 °C and a nominal pressure of PN 10.

This standard further specifies the dimensions, the materials and the connection details of four series of straight and angle pattern thermostatic radiator valves of nominal pressure ≤ PN 10.

This standard can be used as reference in a CEN/CENELEC Certification Mark System on thermostatic radiator valves.

Kommittébeteckning: SIS/TK 110 (Akustik och buller)
Källa: CEN
Svarsdatum: den 27 nov 2018
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This document specifies methods of predicting sound exposure levels of shooting sound for a single shot at a given reception point. Guidelines are given to calculate other acoustic indices from the sound exposure level. The prediction is based on the angular source energy distribution of the muzzle blast as defined in ISO 17201-1 or calculated using values from ISO 17201-2.

This document applies to weapons with calibres of less than 20 mm or explosive charges of less than 50 g TNT equivalent, at distances where peak pressures, including the contribution from projectile sound, are less than 1 kPa (154 dB).

NOTE National or other regulations, which could be more stringent, can apply.

Ämnesområden: Flöde i öppen kanaler
Kommittébeteckning: SIS/TK 432 (Hydrometri)
Källa: ISO
Svarsdatum: den 17 dec 2018
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This International Standard provides an understanding of the nature of measurement uncertainty and

its significance in estimating the ‘quality’ of a measurement or a determination in hydrometry.

It is applicable to flow measurements in natural and man-made channels. Rainfall measurements are

not covered.

Kommittébeteckning: SIS/TK 111 (Vibration och stöt)
Källa: ISO
Svarsdatum: den 9 jan 2019
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This document details specifications for the instrumentation and methods to be used for testing fixed temperature sensitivity of vibration transducers. It applies to rectilinear velocity and acceleration transducers.

The methods specified use both comparison to a reference transducer, and absolute measurement by laser interferometer.

This document is applicable for a frequency range from 10 Hz to 3 kHz (method-dependent), dynamic range from 1 m/s2 to 100 m/s2 (frequency-dependent) and temperature range from –190 °C to 800 °C (method-dependent). Although among all the described systems it is possible to achieve these ranges, generally each has limitations permitting their testing ranges.

The methods and procedures described allow the determination of the complex sensitivity or temperature response of complex sensitivity of a transducer to sinusoidal vibration in the temperature chamber. Method 1 (using a laser interferometer) is applicable to magnitude of sensitivity and phase calibration in the frequency range 10 Hz to 3 kHz at fixed temperatures (see Clause 5). Method 2 (using a reference transducer inside a chamber whose temperature limit is –70 °C to 500 °C) can be used for magnitude of sensitivity and phase calibration in the frequency range 10 Hz to 1 kHz at fixed temperatures (see Clause 6). Method 3 (using a reference transducer outside the chamber) can only be used for the determination of the temperature response of complex sensitivity over a certain temperature range (see Clause 7).

NOTE Method 1 and Method 2 can provide the deviation of complex sensitivity over a certain temperature range if the calibration is also done at reference temperature (about 20 °C).

In order to ensure the consistency of the use and test condition, the transducer, its cable and the conditioning amplifier should preferably be considered as a single unit and tested together.

Kommittébeteckning: SIS/TK 110 (Akustik och buller)
Källa: ISO
Svarsdatum: den 18 jan 2019
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The proposed standard deals with cases where a vibrating component (a source of structure-borne sound

or vibration) is attached to a passive structure (or receiver) and is the cause of vibration in, or structureborne

sound radiation from, the assembly. Examples are pumps installed in ships, servo motors in

vehicles or machines and plant in buildings. Almost any vibrating component can be considered as a

source in this context.

It is necessary to measure vibration at all contact degrees of freedom (connections between the source

and receiver). Therefore, the standard can only be applied to assemblies for which such measurement is

possible.

The standard is restricted to assemblies whose frequency response functions (FRFs) are linear and time

invariant.

The source may be installed into a real assembly or attached to a specially designed test stand (as

described in 4.2).

The standard method has been validated for stationary signals such that the results can be presented in

the frequency domain. However, the method is not restricted to stationary signals and with appropriate

data processing it is also applicable to time-varying signals such as transients and shocks (provided

linearity and time invariance of the FRFs is preserved).

Kommittébeteckning: SIS/TK 110 (Akustik och buller)
Källa: ISO
Svarsdatum: den 19 jan 2019
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This standard applies to Hearing Aid Fitting Management (HAFM) services offered by hearing aid professionals (HAP) when providing benefit for their clients. The provision of hearing aids relies on the practices of a hearing aid professional, to ensure the proper fitting and adequate service in the interest of the client with hearing loss.

This standard specifies general processes of HAFM from the client profile to the follow-up through administering, organising and controlling hearing aid fitting through all stages. It also specifies important preconditions such as education, facilities, and systems that are required to ensure proper services.

The focus of this standard is the services offered to the majority of adult clients with hearing impairment. It is recognized that certain groups of hearing loss such as children, persons with other disabilities or persons with implantable devices may require services outside the scope of this standard.

Hearing loss can be a consequence of serious medical conditions. Hearing aid professionals are not in a position to diagnose or treat such conditions. When assisting clients seeking hearing rehabilitation without prior medical examination hearing aid professionals must be observant of symptoms of such conditions and refer to proper medical care.

Further to the main body of the standard, that specifies the HAFM requirements and processes, several informative annexes are provided. Proper education of hearing aid professionals is vital for exercising HAFM. Annex A defines the competencies required for the HAFM processes; Annex B offers a recommended curriculum for education of hearing aid professionals. Annex C is an example of an appropriate fitting room. Annex D is a guidance on referral of clients for medical or other specialist examination and treatment. Annex E is a recommendation for important information to be exchanged with the client during the course of HAFM. Annex F is a comprehensive terminology list offering definitions of most current terms related to HAFM.

It is the intention that these annexes will be helpful to those who wish to deliver HAFM of the highest quality.