IEC-62127-2-CORR-1-2008.pdf
《IEC-62127-2-CORR-1-2008.pdf》由会员分享,可在线阅读,更多相关《IEC-62127-2-CORR-1-2008.pdf(4页珍藏版)》请在三一文库上搜索。
1、August 2008 IEC 62127-2 (First edition 2007) Ultrasonics Hydrophones Part 2: Calibration for ultrasonic fields up to 40 MHz C O R R I G E N D U M 1 Page 15 5 Overview of calibration procedures 5.1 Principles On page 16, instead of: NOTE 2 “Absolute” hydrophone calibration is understood here in the s
2、ense of “without reference to another hydrophone”. This is sometimes also referred to as “primary” or “substitution” procedure, which means a sensitivity comparison with a calibrated reference hydrophone. The reference hydrophone itself may have been calibrated in “absolute” terms or against another
3、 reference hydrophone, and so on. Obviously, there are two different, fundamental procedures: to perform an absolute hydrophone calibration and to compare the sensitivity of two hydrophones. Clauses 9, 10, 11, Annexes D, F and H deal with the former procedure. The latter procedure is dealt with in d
4、etail in Clause 12. It should be noted that a substitution calibration usually involves both steps and that the interested user should refer to both Clause 12 and other clauses dealing with absolute calibration (and that uncertainties from both fundamental steps contribute to the final calibration u
5、ncertainty in the case of a substitution calibration). read: NOTE 2 “Absolute” hydrophone calibration is understood here in the sense of “without reference to another hydrophone”. This is sometimes also referred to as “primary” calibration. On the other hand, hydrophones are often calibrated in prac
6、tice following a “secondary” or “substitution” procedure, which means a sensitivity comparison with a calibrated reference hydrophone. The reference hydrophone itself may have been calibrated in “absolute” terms or against another reference hydrophone, and so on. Obviously, there are two different f
7、undamental procedures: to perform an absolute hydrophone calibration and to compare the sensitivity of two hydrophones. Clauses 9, 10, 11, and Annexes D, F and H deal with the former procedure. The latter procedure is dealt with in detail in Clause 12. It should be noted that a substitution calibrat
8、ion usually involves both steps and that the interested user should refer to both Clause 12 and the other clauses dealing with absolute calibration (and that uncertainties from both fundamental steps contribute to the final calibration uncertainty in the case of a substitution calibration). Page 20
9、6.3 Hydrophone size In the second sentence, instead of: “.the effective radius of the hydrophone small be small compared with.” read: “the effective radius of the hydrophone shall be small compared with.” Copyright International Electrotechnical Commission Provided by IHS under license with IECLicen
10、see=Boeing Co/5910770001 Not for Resale, 10/25/2008 03:15:36 MDTNo reproduction or networking permitted without license from IHS -,-,- August 2008 Page 25 10 Free field calibration by planar scanning On page 26, for Equation (6), instead of: =dzdytlyxIlPcos),()( (6) read: =dxdytlyxIlPcos),()( (6) Pa
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- IEC 62127 CORR 2008
链接地址:https://www.31doc.com/p-3768766.html