Metrologi och mätning. Fysikaliska fenomen

Ämnesområden: Strålningsmätning
Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: ISO
Svarsdatum: den 22 dec 2017
Se merSe mindre
 

This International Standard specifies a procedure, in the field of ionizing radiation metrology, for the calculation of the “decision threshold”, the “detection limit” and the “limits of the coverage interval” for a non-negative ionizing radiation measurand when counting measurements with preselection of time or counts are carried out. The measurand results from a gross count rate and a background count rate as well as from further quantities on the basis of a model of the evaluation. In particular, the measurand can be the net count rate as the difference of the gross count rate and the background count rate, or the net activity of a sample. It can also be influenced by calibration of the measuring system, by sample treatment and by other factors.

This International Standard has been divided into four parts covering elementary applications in Part 1, advanced applications on the basis of the GUM Suppl. 1 in Part 2, applications to unfolding methods in Part 3, and guidance to the application in Part 4.

Part 1 covers basic applications of counting measurements frequently used in the field of ionizing radiation metrology. It is restricted to applications for which the uncertainties can be evaluated on the basis of the GUM (JCGM 2008). In Annex A, the special case of repeated counting measurements with random influences and in Annex B measurements with linear analogous ratemeters are covered.

Part 2 extends the former ISO 11929:2010 to the evaluation of measurement uncertainties according to the GUM Supplement 1. Part 2 also presents some explanatory notes regarding general aspects of counting measurements and on Bayesian statistics in measurements.

Part 3 deals with the evaluation of measurements using unfolding methods and counting spectrometric multi-channel measurements if evaluated by unfolding methods, in particular, alpha- and gamma-spectrometric measurements. Further, it provides some advice how to deal with correlations and covariances.

Part 4 gives guidance to the application of this International Standard, summarizing shortly the general procedure and then presenting a wide range of numerical examples.

This International Standard also applies analogously to other measurements of any kind especially if a similar model of the evaluation is involved. Further practical examples can be found in other International Standards, for example ISO 18589 [6], ISO 9696 [7], ISO 9697 [8], ISO 9698 [9], ISO 1070[10], ISO 7503 [11], ISO 28218 [12], and ISO 11885 [13].

NOTE A code system, named UncertRadio, is available allowing for calculations according to ISO/DIS 11929:2017 Parts 1 to 3. UncertRadio [26, 27] which can be downloaded for free from https://www.thuenen.de/de/fi/arbeitsbereiche/meeresumwelt/leitstelle-umweltradioaktivitaet-infisch/uncertradio/. The download contains a setup installation file which copies all files and folders into a folder specified by the user. After installation one has to add information to the PATH of Windows as indicated by a pop-up window during installation. English language can be chosen and extensive “help” information is available.

Ämnesområden: Strålningsmätning
Kommittébeteckning: SIS/TK 405 (Kärnenergi)
Källa: ISO
Svarsdatum: den 22 dec 2017
Se merSe mindre
 

This International Standard specifies a procedure, in the field of ionizing radiation metrology, for the calculation of the “decision threshold”, the “detection limit” and the “limits of the coverage interval” for a non-negative ionizing radiation measurand when counting measurements with preselection of time or counts are carried out. The measurand results from a gross count rate and a background count rate as well as from further quantities on the basis of a model of the evaluation. In particular, the measurand can be the net count rate as the difference of the gross count rate and the background count rate, or the net activity of a sample. It can also be influenced by calibration of the measuring system, by sample treatment and by other factors.

This International Standard has been divided into four parts covering elementary applications in Part 1, advanced applications on the basis of the GUM Suppl. 1 in Part 2, applications to unfolding methods in Part 3, and guidance to the application in Part 4.

Part 1 covers basic applications of counting measurements frequently used in the field of ionizing radiation metrology. It is restricted to applications for which the uncertainties can be evaluated on the basis of the GUM (JCGM 2008). In Annex A the special case of repeated counting measurements with random influences and in Annex B measurements with linear analogous ratemeters are covered.

Part 2 extends the former ISO 11929:2010 to the evaluation of measurement uncertainties according to the GUM Supplement 1. Part 2 also presents some explanatory notes regarding general aspects of counting measurements and on Bayesian statistics in measurements.

Part 3 deals with the evaluation of measurements using unfolding methods and counting spectrometric multi-channel measurements if evaluated by unfolding methods, in particular, alpha- and gamma-spectrometric measurements. Further, it provides some advice how to deal with correlations and covariances.

Part 4 gives guidance to the application of this International Standard, summarizing shortly the general procedure and then presenting a wide range of numerical examples.

This International Standard also applies analogously to other measurements of any kind especially if a similar model of the evaluation is involved. Further practical examples can be found in other International Standards, for example ISO 18589 [6], ISO 9696 [7], ISO 9697 [8], ISO 9698 [9], ISO 10703 [10], ISO 7503 [11], ISO 28218 [12], and ISO 11885 [13].

NOTE A code system, named UncertRadio, is available allowing for calculations according to ISO/DIS 11929:2017 Parts 1 to 3. UncertRadio [27, 28] which can be downloaded for free from https://www.thuenen.de/de/fi/arbeitsbereiche/meeresumwelt/leitstelle-umweltradioaktivitaet-infisch/uncertradio/. The download contains a setup installation file which copies all files and folders into a folder specified by the user. After installation one has to add information to the PATH of Windows as indicated by a pop-up window during installation. English language can be chosen and extensive “help” information is available.

Kommittébeteckning: SIS/TK 407 (Värmemätare)
Källa: CEN
Svarsdatum: den 28 dec 2017
Se merSe mindre
 
Kommittébeteckning: SIS/TK 407 (Värmemätare)
Källa: CEN
Svarsdatum: den 28 dec 2017
Se merSe mindre
 
Kommittébeteckning: SIS/TK 407 (Värmemätare)
Källa: CEN
Svarsdatum: den 28 dec 2017
Se merSe mindre
 
Kommittébeteckning: SIS/TK 407 (Värmemätare)
Källa: CEN
Svarsdatum: den 28 dec 2017
Se merSe mindre
 
Kommittébeteckning: SIS/TK 467 (Värmepumpar)
Källa: CEN
Svarsdatum: den 20 jan 2018
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This European Standard specifies methods for testing the sound power level of air/water, brine/water, water/water and direct exchange/water heat pump water heaters and heat pump combination heaters with electrically driven compressors and connected to or including a domestic hot water storage tank for domestic hot water production.

This European Standard comprises only the testing procedure for the domestic hot water production of the heat pump system.

NOTE 1 Testing procedures for simultaneous operation for domestic hot water production and space heating are not treated in this standard. Simultaneous operation means that domestic hot water production and space heating generation occur at the same time and may interact.

NOTE 2 For space heating function, the requirements are given in prEN 12102-1:2015.

This European Standard only applies to water heaters which are supplied in a package of heat pump and storage tank. In the case of water heaters consisting of several parts with refrigerant connections, this European Standard applies only to those designed and supplied as a complete package.

This European Standard does not specify requirements of the quality of the used water.