1、CEI 60534-8-4(Deuxime dition 2005)Vannes de rgulation des processus industriels Partie 8-4:Considrations sur le bruit Prvision du bruit gnr par un coulement hydrodynamique CORRIGENDUM 1 Page 4 AVANT-PROPOS Dernier alina de la page 4 Ajouter les deux phrases suivantes:Cette mthode est considre comme
2、tant prcise 5 dB(A)prs,sauf dans la gamme de xF=xFz 0,1,lorsque xFz est calcul en utilisant les quations 3(a)ou(3b)pour estimation.Des rsultats plus prcis sont possibles quand xFz est dtermin partir des mesures selon la CEI 60534-8-2.Page 14 3 Symboles Supprimer“fc“et“p“.Page 26 5.3 Bruit externe Su
3、pprimer la deuxime phrase.Equation 18(a)Remplacer:TLfp par:TLturb Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 30 6.3.1 Equipements multi-tags(voir Figures 1 et 3)Remp
4、lacer:“en utilisant les Figures 4 7”par:“en utilisant les Figures 4 9”Fvrier 2006 Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IEC 60534-8-4(Second edition 2005)Industrial-
5、process control valves Part 8-4:Noise considerations Prediction of noise generated by hydrodynamic flow CORRIGENDUM 1 Page 5 FOREWORD Last paragraph on page 5 Add the following two sentences:This method is considered accurate within 5 dB(A)except in the range of xF=xFz 0,1 when xFz is calculated usi
6、ng equations 3(a)or(3b)for estimation.More accurate results are possible when xFz is determined from measurements according to IEC 60534-8-2.Page 15 3 Symbols Delete“fc“and“p“.Page 27 5.3 External noise Delete second sentence.Equation 18(a)Instead of:TLfp read:TLturb Copyright International Electrot
7、echnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 31 6.3.1 Multistage devices(see Figures 1 and 3)Instead of:“using Figures 4 through 7”read:“using Figures 4 through 9”February 2006 Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
