DIN ISO 16063-21-2016 Methods for the calibration of vibration and shock transducers - Part 21 Vibration calibration by comparison to a reference transducer (ISO 16063-21 2003 + Co.pdf

1、August 2016 English price group 15No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 17.160!%YE,“2543409www.din.deDIN

2、ISO 16063-21Methods for the calibration of vibration and shock transducers Part 21: Vibration calibration by comparison to a reference transducer (ISO 16063-21:2003 + Cor. 1:2009 + Amd. 1:2016),English translation of DIN ISO 16063-21:2016-08Verfahren zur Kalibrierung von Schwingungs- und Stoaufnehme

3、rn Teil 21: Schwingungskalibrierung durch Vergleich mit einem Referenzaufnehmer (ISO 16063-21:2003 + Cor. 1:2009 + Amd. 1:2016),Englische bersetzung von DIN ISO 16063-21:2016-08Mthodes pour ltalonnage des transducteurs de vibrations et de chocs Partie 21: talonnage de vibrations par comparaison un t

4、ransducteur de rfrence (ISO 16063-21:2003 + Cor. 1:2009 + Amd. 1:2016),Traduction anglaise de DIN ISO 16063-21:2016-08SupersedesDIN ISO 16063-21:2004-01 andDIN ISO 16063-21 Corrigendum 1:2009-08www.beuth.deDocument comprises 35 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-lan

5、guage original shall be considered authoritative.08.16 DIN ISO 16063-21:2016-08 2 A comma is used as the decimal marker. Contents Page National foreword . 3 National Annex NA (informative) Bibliography . 4 Introduction 5 1 Scope 5 2 Normative references 6 3 Uncertainty of measurement 6 4 Requirement

6、s for apparatus and environmental conditions . 8 4.1 General 8 4.2 Environmental conditions . 8 4.3 Reference transducer 8 4.4 Vibration generation equipment . 9 4.5 Voltage measuring instrumentation . 10 4.6 Distortion measuring instrumentation 11 4.7 Oscilloscope 11 4.8 Phase shift measuring instr

7、umentation 11 5 Calibration 12 5.1 Preferred amplitudes and frequencies 12 5.2 Measurement requirements 12 5.3 Calibration procedure 13 6 Expression of results . 13 7 Reporting the calibration results . 14 (normative) Expression of uncertainty of measurement in calibration 16 Annex AAnnex B (normati

8、ve) Definitions of amplitude sign and phase shift between mechanical motion and vibration transducer electrical output . 25 Annex C (informative) Nomogram for conversion between acceleration, velocity and displacement 26 (informative) Example of uncertainty calculation 28 Annex D! (informative) Tran

9、sfer standard“ . 34 Annex EBibliography . 35 DIN ISO 16063-21:2016-08 3 National foreword The text of ISO 16063-21, Corrigendum 1 and Amendment 1 has been prepared by Technical Committee ISO/TC 108 “Mechanical vibration, shock and condition monitoring”, Subcommittee SC 3 “Use and calibration of vibr

10、ation and shock measuring instruments” (Secretariat: DS, Denmark). The responsible German body involved in its preparation was Normenausschuss Akustik, Lrmminderung und Schwingungstechnik im DIN und VDI (Acoustics, Noise Control and Vibration Engineering Standards Committee in DIN and VDI), Working

11、Committee NA 001-03-02 AA (NALS/VDI C 2) Schwingungsmesstechnik. The area of application of this standard is very broad and includes all levels in the calibration hierarchy upon which calibration of rectilinear vibration transducers by comparison can be carried out. The comparative standard can be a

12、 secondary, reference, working or test standard for application on site. This standard includes Amendment 1:2016 published by ISO on 2016-02-01. The start and finish of text introduced or altered by amendment is indicated in the text by tags !and“ The draft of this standard was published as E DIN IS

13、O 16063-21/A1:2015-06. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. The DIN Standards and publications corresponding to the International Standard

14、s and publications referred to in this document are as follows: ISO 266 DIN EN ISO 266 ISO 5348 DIN ISO 5348 ISO/IEC Guide 98-3 (GUM) DIN V ENV 13005 ISO/IEC Guide 99 (VIM) Internationales Wrterbuch der Metrologie (VIM) ISO 16063 Methods for the calibration of vibration and shock transducers consist

15、s of the following parts: Part 1: Basic concepts Part 11: Primary vibration calibration by laser interferometry Part 12: Primary vibration calibration by the reciprocity method Part 13: Primary shock calibration using laser interferometry Part 15: Primary angular vibration calibration by laser inter

16、ferometry Part 16: Calibration by Earths gravitation Part 17: Primary calibration by centrifuge Part 21: Vibration calibration by comparison to a reference transducer Part 22: Shock calibration by comparison to a reference transducer Part 31: Testing of transverse vibration sensitivity Part 41: Cali

17、bration of laser vibrometers Part 42: Calibration of seismometers with high accuracy using acceleration of gravity Part 43: Calibration of accelerometers by model-based parameter identification*) DIN ISO 16063-21:2016-08 4 The following parts are under preparation: Part 32: Resonance testing Testing

18、 the frequency and the phase response of accelerometers by means of shock excitation Part 33: Testing of magnetic field sensitivity Part 44: Calibration of field vibration calibrators Part 45: In-situ calibration of transducers with built in calibration coil Amendments This standard differs from DIN

19、 ISO 16063-21:2004-01 and Corrigendum 1:2009-08 as follows: Corrigendum ISO 16063-21:2003/Cor. 1:2009 and Amendment ISO 16063-21:2003/Amd.1:2016 have been incorporated in the text; in particular, Annex E has been added and errors have been corrected, allowing some national footnotes to be omitted. P

20、revious editions DIN ISO 16063-21: 2004-01 DIN ISO 16063-21 Corrigendum 1: 2009-08 National Annex NA (informative) Bibliography DIN V ENV 13005, Guide to the expression of uncertainty in measurement*) DIN EN ISO 266, Acoustic Preferred frequencies DIN ISO 5348, Mechanical vibration and shock Mechani

21、cal mounting of accelerometers DIN ISO 16063-16, Methods for the calibration of vibration and shock transducers Part 16: Calibration by Earths gravitation DIN ISO 16063-22, Methods for the calibration of vibration and shock transducers Part 22: Shock calibration by comparison to a reference transduc

22、er DIN ISO 16063-43, Methods for the calibration of vibration and shock transducers Part 43: Calibration of accelerometers by model-based parameter identification*)ISO/IEC Guide 99, International vocabulary of metrology (VIM) Beuth-Verlag, Berlin, Wien, Zrich *) Has been withdrawn, but the German ed

23、ition is nonetheless very helpful and still obtainable from Beuth Verlag *) Draft stage DIN ISO 16063-21:2016-08 5 Methods for the calibration of vibration and shock transducers Part 21: Vibration calibration by comparison to a reference transducer Introduction The ISO 16063 series of standards is c

24、oncerned with methods for the calibration of vibration and shock transducers under both standard laboratory conditions and in the field. As such, the intended user group of this part of ISO 16063 is wide, ranging from metrologists in mechanical vibration to technicians evaluating the vibration chara

25、cteristics of a machine or structure, or human exposure to vibration. The key to the application of this part of ISO 16063 is in the careful detailed specification and evaluation of measurement uncertainty, i.e. the error budget and computation of expanded uncertainty associated with the measurement

26、 of vibration. This part of ISO 16063 is particularly intended for those engaged in vibration measurements requiring traceability to primary national or international standards through a secondary, reference, working or check standard (portable calibrator intended for field use) as defined in the In

27、ternational vocabulary of basic and general terms in metrology (VIM). The specifications for the instrumentation and the procedures given are intended to be used for calibration of rectilinear vibration transducers (with or without signal conditioning) to obtain the magnitude and (optionally) phase

28、shift of the complex sensitivity at frequencies in the range of 0,4 Hz to 10 kHz. 1 Scope This part of ISO 16063 describes the calibration of rectilinear vibration transducers by comparison. Although it mainly describes calibration using direct comparison to a standard calibrated by primary methods,

29、 the methods described can be applied between other levels in the calibration hierarchy. This part of ISO 16063 specifies procedures for performing calibrations of rectilinear vibration transducers by comparison in the frequency range from 0,4 Hz to 10 kHz. It is primarily intended for those who are

30、 required to meet ISO standardized methods for the measurement of vibration under laboratory conditions, where the uncertainty of measurement is relatively small. It can also be used under field conditions, where the uncertainty of measurement may be relatively large. From knowledge of all significa

31、nt sources of uncertainty affecting the calibration, the expanded uncertainty can be evaluated using the methods given in this part of ISO 16063. It also covers the assessment of uncertainties for calibrations performed using a check standard. Comparison calibrations made in accordance with this par

32、t of ISO 16063 need to allow for the environmental conditions of the reference transducer calibration. NOTE Transducer calibrations made under extreme environmental conditions are covered by other International Standards. DIN ISO 16063-21:2016-08 6 2 Normative references The following referenced doc

33、uments are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 266, Acoustics Preferred frequencies ISO 2041:1990, Vibration and shock V

34、ocabulary ISO 16063-1:1998, Methods for the calibration of vibration and shock transducers Part 1: Basic concepts ISO 16063-11:1999, Methods for the calibration of vibration and shock transducers Part 11: Primary vibration calibration by laser interferometry Guide to the expression of uncertainty in

35、 measurement (GUM). BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML, 19931)N1)3 Uncertainty of measurement 3.1 All users of this part of ISO 16063 are expected to make uncertainty budgets according to Annex A to document their level of uncertainty (see example in Annex D). To help set up systems fulfilling

36、 different requirements two examples are given. System requirements for each are set up and the attainable uncertainty is given. Example 1 is typical for calibrations under well-controlled laboratory conditions with the requirement to obtain a high accuracy. Example 2 is typical for calibrations whe

37、re less than the highest accuracy can be accepted or where calibration conditions are such that only less narrow tolerances can be maintained. These two examples will be used throughout this part of ISO 16063. a) Example 1 The reference transducer is calibrated by primary means and documented uncert

38、ainty. The calibration may be transferred to a working standard for practical reasons. The temperature and other conditions are kept within narrow limits during the comparison calibration as indicated in the appropriate clauses. b) Example 2 The reference transducer is not calibrated by primary mean

39、s, but has a traceable calibration, as defined in VIM (see 2), with the corresponding uncertainty documented. The calibration may be transferred to a working standard for practical reasons. The requirements on other parameters and instruments are indicated in the appropriate clauses. 3.2 For both ex

40、amples, the minimum calibration requirement for the reference transducer is calibration under suitable reference conditions (i.e. frequency, amplitude and temperature). Normally the conditions will be chosen as indicated in ISO 16063-11. It is applicable for the following parameters: Frequency range

41、: 20 Hz to 5 000 Hz, optionally 0,4 Hz to 10 000 Hz (see Note) 1)Corrected and reprinted in 1995. N1)National footnote: This publication is also available as ISO/IEC Guide 98-3 (see National foreword). DIN ISO 16063-21:2016-08 7 Dynamic range: 10 m/s2to 1 000 m/s2r.m.s., optionally 0,1 m/s2to 1 000

42、m/s2(frequency dependent) NOTE The indicated frequency ranges are not mandatory and single-point calibrations are also acceptable. At any given frequency and amplitude of acceleration, velocity or displacement, the dynamic range will be limited by the noise floor and the amount of distortion produce

43、d by the excitation apparatus (if no filtering is used) or its maximum power. (Techniques are also used to counteract the inherent distortion at large displacements for spring-controlled exciters by changing the waveform of the input voltage.) Typical maximum values for electrodynamic vibration exci

44、ters designed for the frequency range from 10 Hz to 10 kHz are 200 m/s2to 1000 m/s2r.m.s. acceleration, 0,5 m/s to 1 m/s r.m.s. velocity and 5 mm peak displacement. The lower limits will be set by the noise in the two measurement channels, and by the bandwidth used. Typical values used for measureme

45、nt are 50 m/s2to 100 m/s2r.m.s. acceleration or 0,1 m/s r.m.s. velocity. For calibrators, values between 1 m/s2and 10 m/s2r.m.s. are normally used. A graph similar to the one shown in Annex C is useful when considering the ranges covered. When measurements are performed at the lowest frequencies, th

46、e limiting factor is normally displacement. At 1 Hz, typical values for long-stroke vibrators are 1 m/s2to 2 m/s2r.m.s. acceleration or 0,1 m/s to 0,3 m/s r.m.s. velocity. 3.3 The attainable uncertainties (expanded uncertainties calculated using a coverage factor of 2 in accordance with ISO 16063-1)

47、 for the two examples are given in Table 1. In practice, these limits may be exceeded depending on the uncertainty with which the reference transducer has been calibrated, the response characteristics of the reference transducer and the transducer to be calibrated, the vibratory characteristics of t

48、he exciter and the instrumentation used in the measurement apparatus. It is the responsibility of the laboratory or end user to make sure that the reported values of expanded uncertainty are credible. Table 1 Attainable uncertainties of magnitude and phase shift of the complex sensitivity Parameter

49、Example 1 Example 2 Magnitude For accelerometers (0,4 Hz to 1 000 Hz) 1 % 3 % For accelerometers (1 000 Hz to 2 000 Hz) 2 % 5 % For accelerometers (2 kHz to 10 kHz) 3 % 10 % For displacement and velocity transducers (20 Hz to 1 000 Hz) 4 % 6 % Phase shiftaAt reference conditionsb(i.e. the level and frequency at which the reference transducer was calibrated) 1 3 Outside reference conditions 2,5 5 aPhase shift measurement is not m