JIS-B-0907-1989-R2005-ENG.pdf
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1、J I S B*0907 89 4933608 0008b47 4 - - - - = UDC 62-233:62-24534.63 JAPANESE INDUSTRIAL STANDARD Mechanical Vibration of Rotating and Reciprocating Machinery-Requirements for Instruments for Measuring Vibration Severity Translated and Published by Japanese Standards Association Printed in Japan 6 s C
2、opyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:26 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 7 _-_ J I S B*0907 89 4933608 0008648 b E In the event of
3、 any doubt arising, the original Standard in Japanese is to be final authority. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:26 MDTNo reproduction or networking permitted without l
4、icense from IHS -,-,- JIS B*0707 87 9 4733b08 0008647 B 9 UDC 62-233:62-24:534.63 JAPANESE INDUSTRIAL STANDARD J I S Mechanical Vibration of Rotating and Reciprocating Machinery - Requirements for Instruments for Measuring Vibration Severity B 0907 - 1989 1. ScoDe This Japanese Industrial Standard s
5、tates the requirements which a measuring instrument for vibration severity of machines should meet if inaccuracies of measure- ment, particularly when making comparisons between one machine and another, are not to exceed a specific value. Standard are suitable for use in carrying out the procedures
6、specified in IS0 2372 and JIS B 0906 and are designated “Measuring instruments for vibration severity in rotating and reciprocating machines“. Instruments meeting the requirements of this The instruments covered by this Standard give direct indication or recording of root-mean-square vibration veloc
7、ity, which is defined as the measuring unit of the vibration severity. Remarks 1. A method of checking true root-mean-square (rms) indication is described in an Appendix. 2. Subject to limitation of the measuring-frequency range, these instruments may be used for other applications where similar acc
8、uracy of measurement is required,. for example measurement of vibration velocity of structures, tunnels, bridges, etc. 2. Definitions The terms used in this Standard are defined in the following IEC Publications and IS0 International Standards: IEC 184-Methods for specifying the characteristics of e
9、lectromechanical trans- ducers for shock and vibration measurements IEC 222-Methods for specifying the characteristics of auxiliary equipment for shock and vibration measurements IS0 2041-Vibration and shock - Vocabulary IS0 2372-Mechanical vibration of machines with operating speeds from 10 to IEC
10、34- 14-Rotating electrical machines. 200 rev/s - Basis for specifying evaluation standards Part 14: Mechanical vibration of certain machines with shaft heights 56 mm and higher - Measurement, evaluation and limits of the vibration severity Applicable Standard: JIS B 0906- Mechanical Vibration of Mac
11、hines with Operating Speeds from 10 to 200 r/s - Basis for Specifying Evaluation Standards Corresponding International Standard: IS0 2954-Mechanical vibration of rotating and reciprocating machinery - Requirements for instruments for measuring vibration severity Copyright Japanese Standards Associat
12、ion Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:26 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S BX0907 89 W 4933b08 0008b50 4 2 B 0907-1989 3. General Requirements A vibration measuring
13、 instrument usually consists of: a vibration pickup; an indicator set which contains an amplifier, correcting filter networks for the fre- quency response and an indicating or recording instrument; and a power supply system. The requirements described in this clause apply to the general characterist
14、ics Clauses of the complete assembly of the pickup and the true Vrms indicator set. 4 and 5 contain the detailed requirements for each of these main units. 3.1 The frequency range of the vibration severity measuring instrument shall be from 10 to 1000 Hz. Remark: This means that the frequency range
15、corresponds to the frequency interval employed in the evaluation scale in JIS B 0906 (IS0 2372 3.2 The sensitivity within the measuring-frequency range shall not deviate from the reference sensitivity at 80 Hz by more than the quantities given in the Table. To minimize measurement errors caused by t
16、he interference due to vibrations with frequencies outside the measuring-frequency range, the sensitivity shall decrease rapidly in a clearly defined manner at the limits of the frequency range. the required nominal values of the sensitivity and the permissible minimum and maximum values are given i
17、n the Table. Both To preclude doubts about the course of the sensitivity between the cutoff frequencies shown in the Table, Figure illustrates the course of the nominal value of the relative sensitivity and the limit of the permissible deviation within the whole frequency range from 1 to 10000 Hz, R
18、emark: In some cases it may be necessary to limit further the measuring- frequency range at its upper or lower boundaries to avoid interfering vibrations which are irrelevant to the assessment of the vibration characteristics of a machine. may be equipped with additional high-pass or low-pass filter
19、s. It is recommended that the cutoff frequencies and edge steepness of these filters be selected in accordance with IEC specifications. When the measuring-f requency range is narrowed down by addi- tional filters, the measured value should not be used for assessing the vibration severity in accordan
20、ce with JIS B 0906 and IEC 34- 14. for the measuring-frequency range as well as the measured value, for example Vrms (40 to 100 Hz) = 7.5 mm/s. For this purpose the instrument To avoid errors, it is necessary to state the cutoff frequencies 3.3 The selection of the measurement range shall be such th
21、at the indication of the lowest level of the vibration severity to be measured shall be equal to at least 30 % of the full-scale value. tion severity range (for example in accordance with Table 1 of JIS B 0906 (IS0 2372) shall be stated, for example “Measuring instrument for vibration severity with
22、measurement range 0.28 to 28 mm/s“. The minimum and maximum levels of the vibra- Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 06:39:26 MDTNo reproduction or networking permitted without
23、license from IHS -,-,- J I S B*090? 89 W 4933608 0008653 6 W - 3 B 0907-1989 3.4 The error of the vibration severity measuring instrument is composed of -a the permissible deviations for the frequency response in accordance with 3.2 and the error in the absolute value of the sensitivity at the refer
24、ence frequency of 80 Hz (Le. calibration error). The measurement error may be up to a maximum of t 10 % of the indicated value, including the calibration error, at 80 % of full- scale value. These limits of error apply over the whole operating temperature range authorized for the vibration pickup an
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