IEC 61672-3-ed.2.0

Annotation of standard text IEC 61672-3-ed.2.0 :

IEC 61672-3:2013 describes procedures for periodic testing of time-weighting, integrating-averaging, and integrating sound level meters that were designed to conform to the class 1 or class 2 specifications of the second edition of IEC 61672-1. The aim of the standard is to ensure that periodic testing is performed in a consistent manner by all laboratories. The purpose of periodic testing is to assure the user that the performance of a sound level meter conforms to the applicable specifications of IEC 61672-1 for a limited set of key tests and for the environmental conditions under which the tests were performed. Periodic tests described in this edition of IEC 61672-3 apply to sound level meters for which the manufacturer claims conformance to the specifications of the second edition of IEC 61672-1. Periodic tests described in IEC 61672-3 apply to sound level meters for which the model has been, or has not been, pattern approved by an independent testing organization responsible for pattern approvals in accordance with the test procedures of the second edition of IEC61672-2. This second edition cancels and replaces the first edition published in 2006. This second edition constitutes a technical revision. The main changes with regard to the previous concern conformance to specifications which is now demonstrated when measured deviations from design goals do not exceed the applicable acceptance limits, and when the uncertainty of measurement does not exceed the corresponding maximum-permitted uncertainty, with both uncertainties determined for a coverage probability of 95 %. In this document, references to IEC 61672-1, IEC 61672-2, and IEC 61672-3 refer to the second editions unless stated otherwise. Procedures for the periodic testing of sound level meters designed to conform to the specifications of IEC 61672-1:2002 were given in IEC 61672-3:2006. La CEI 61672-3:2013 decrit les procedures relatives aux essais periodiques des sonometres a ponderation temporelle, des sonometres integrateurs-moyenneurs et des sonometres integrateurs concus pour repondre aux specifications de la classe 1 ou de la classe 2 de la CEI 61672-1. Lobjet de la presente norme est de sassurer que les essais periodiques sont effectues de maniere coherente par tous les laboratoires. Le but des essais periodiques est dassurer a lutilisateur que les performances dun sonometre repondent aux specifications applicables de la CEI 61672-1, pour un nombre limite dessais cle et pour les conditions denvironnement dans lesquelles ces essais ont ete realises. Les essais periodiques decrits dans la CEI 61672-3 sappliquent aussi aux sonometres pour lesquels la conformite aux specifications de la deuxieme edition de la IEC 61672-1 a ete declaree par le fabricant. Les essais periodiques decrits dans la CEI 61672-3 sappliquent aux sonometres dont le modele a ete ou na pas ete approuve par un organisme dessai independant, responsable des approbations de modeles conformement aux procedures dessai de la deuxieme edition de la CEI 61672-2. Cette deuxieme edition annule et remplace la premiere edition parue en 2006. Cette deuxieme edition constitue une revision technique. Les modifications techniques majeures suivantes par rapport a ledition precedente concernent la conformite aux specifications qui est maintenant demontree lorsque les ecarts mesures par rapport aux valeurs nominales ne depassent pas les limites dacceptation applicables, et lorsque lincertitude de mesure ne depasse pas lincertitude maximale autorisee correspondante, les deux incertitudes etant determinees pour une probabilite de couverture de 95 %. Dans le present document, les references aux CEI 61672-1, CEI 61672-2, et CEI 61672-3 sentendent pour les deuxiemes editions, sauf indication contraire. Les procedures pour realiser les essais periodiques de sonometres concus pour etre conformes aux specifications de la CEI 61672-1:2002 ont ete donnees dans la CEI 61672-3:2006.