1、 ISO 2017 Flow measurement structures Rectangular, trapezoidal and U-shaped flumes AMENDMENT 1 Structures de mesure du dbit Canaux jaugeurs col rectangulaire, col trapzodal et col en U AMENDEMENT 1 INTERNATIONAL STANDARD ISO 4359 Second edition 2013-02-15 Reference number ISO 4359:2013/Amd.1:2017(E)
2、 AMENDMENT 1 2017-06 ISO 4359:2013/Amd.1:2017(E)ii ISO 2017 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic
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11、surement structures. ISO 2017 All rights reserved iii Flow measurement structures Rectangular, trapezoidal and U-shaped flumes AMENDMENT 110.6.7 Replace the existing Formula (43) with the following: %11.6.7 Replace the existing Formula (58) with the following: %12.6.8 Replace the existing Formula (7
12、7) with the following: %13.3 Replace the existing Formula (87) with the following: %14.4 Replace the existing formula with the following: 14.7.2 Replace the existing Formula (90) with the following: ISO 4359:2013/Amd.1:2017(E) ISO 2017 All rights reserved 1 ISO 4359:2013/Amd.1:2017(E) 14.7.3 Replace
13、 the existing Formula (91) with the following: 14.7.4 Replace “an uncertainty of 6,6 % at the 95 % level of confidence” with “an uncertainty of 4,58 % at the 95 % level of confidence”.14.7.5, Table 5 Replace the existing Table 5 with the following: Table 5 Uncertainty budget for example of flow in a
14、 rectangular-throated flume Parameter Type/evaluation u and u* values Sensitivity coefficients Comment u*(C) B/Normal 1,38 % 1,0 From 13.2.2 u(E) B/Triangular 0,000 4 m From Table B.1 u(R) B/Manufacturer 1,0 % of range From Table B.1 u*(h) Combined 1,17 % 1,5 Using Formula (88) u(b r ) B/Rectangular
15、 0,002 m Assumed resolution u(b m ) B/Rectangular 0,000 87 Measured range u*(b) Combined 0,52 % 1,0 Using Formula (89) u*(Q) 68 Combined 2,29 % Using Formula (90) u*(Q) 95 Combined 4,58 % Using Formula (91)2 ISO 2017 All rights reserved ISO 4359:2013/Amd.1:2017(E) ISO 2017 All rights reserved ICS 17.120.20 Price based on 2 pages
