ISO 12713 pdf download

ISO 12713 pdf download.Non-destructive testing — Acoustic emission inspection — Primary calibration of transducers 1 Scope This International Standard specifies a method for the absolute calibration of acoustic emission transducers. The aim of this International Standard is to establish uniformity of acoustic emission testing in order to form a basis for data correlation and to provide for the interpretation of results obtained by different laboratories at different times. An accepted method for the calibration of acoustic emission transducers must be specified to characterize their behaviour. This International Standard establishes a method for the primary calibration of acoustic emission transducers as receivers of elastic waves at the surface of a solid medium. The calibration yields the frequency response of a transducer to waves of the type normally encountered in acoustic emission work. The transducer voltage response is determined at discrete frequency intervals of approximately 1 0 kHz up to 1 MHz. The input is a given well- established dynamic displacement of the mounting surface. The units of the calibration are output voltage per unit mechanical input (displacement, velocity or acceleration). This International Standard is applicable to secondary standard transducers and to acoustic emission applications transducers. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ASTM E 1 1 4-95, Ultrasonic Pulse-Echo Straight-Beam Examination by the Contact Method. ASTM E 494-95, Measuring Ultrasonic Velocity in Materials. ASTM E 61 0-82 1 ) , Standard Definitions of Terms Relating to Acoustic Emission. 5 General requirements 5.1 Displacement transducers This method is applicable for the absolute calibration of normal displacement transducers for use as secondary standards for the calibration of acoustic emission sensors for the purposes of non-destructive evaluation. For this purpose, the transfer standard should be high-fidelity and very stable and understood. If this can be established, the stated accuracy should apply over the full frequency range up to 1 MHz. NOTE — The stated accuracy applies only if the transfer standard returns to quiescence, following the transient input, before any wave reflected from the boundary of the...