AS/NZS ISO 11222:2024
Air quality – Determination of the uncertainty of the time average of air quality measurements
Standard identically adopts ISO 11222:2002 which provides a method for the quantification of the uncertainty of a time average of a set of air quality data obtained at a specified location over a defined averaging time period.
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AS/NZS ISO 11222:2024 Air quality - Determination of the uncertainty of the time average of air quality measurements
Preface
Foreword
Introduction
1 Scope
2 Normative reference
3 Terms and definitions
4 Symbols and abbreviated terms
5 Requirements on the input data
5.1 General
5.2 Specific requirements on input data
6 Procedure
6.1 General
6.2 Standard uncertainty induced by the measuring system
6.3 Standard uncertainty due to incomplete time coverage
6.4 Combined standard uncertainty
6.5 Expanded uncertainty
7 Reporting uncertainty
Annex A (informative) Example — Quantification of the uncertainty of a monthly average of nitrogen dioxide in ambient air
Bibliography
Table 1 — Coverage factor kp(f) as a function of the level of confidence p and the number of degrees of freedom f as specified in the GUM
Table A.1 — Set of control data of NO2-monitor (January 2000)
Table A.2 — Summary of variance contributions of the hourly mean values Ci for Y ≤ 100 µg/m3
Table A.3 — Random and non-random uncertainty contributions of the hourly mean values Ci for Y ≤ 100 µg/m3
Table A.4 — Assessment of variance contributions of the monthly average _ C month due to the measuring system for Y ≤ 100 µg/m3
Table A.5 — Assessment of the standard uncertainty of the monthly average _ C month due to missing values
Table A.6 — Statements on uncertainty of the time average _ C month
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AS/NZS ISO 11222:2024 Air quality - Determination of the uncertainty of the time average of air quality measurements
Preface
Foreword
Introduction
1 Scope
2 Normative reference
3 Terms and definitions
4 Symbols and abbreviated terms
5 Requirements on the input data
5.1 General
5.2 Specific requirements on input data
6 Procedure
6.1 General
6.2 Standard uncertainty induced by the measuring system
6.3 Standard uncertainty due to incomplete time coverage
6.4 Combined standard uncertainty
6.5 Expanded uncertainty
7 Reporting uncertainty
Annex A (informative) Example — Quantification of the uncertainty of a monthly average of nitrogen dioxide in ambient air
Bibliography
Table 1 — Coverage factor kp(f) as a function of the level of confidence p and the number of degrees of freedom f as specified in the GUM
Table A.1 — Set of control data of NO2-monitor (January 2000)
Table A.2 — Summary of variance contributions of the hourly mean values Ci for Y ≤ 100 µg/m3
Table A.3 — Random and non-random uncertainty contributions of the hourly mean values Ci for Y ≤ 100 µg/m3
Table A.4 — Assessment of variance contributions of the monthly average _ C month due to the measuring system for Y ≤ 100 µg/m3
Table A.5 — Assessment of the standard uncertainty of the monthly average _ C month due to missing values
Table A.6 — Statements on uncertainty of the time average _ C month
AS/NZS ISO 11222:2024
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.