ISO International Standard

Non-destructive testing — Acoustic emission inspection — Secondary calibration of acoustic emission sensors

This International Standard specifies a method for the secondary calibration of acoustic emission sensors as

receivers of elastic waves at the surface of a solid medium. The International Standard is applicable to laboratory

tertiary standard sensors and acoustic emission applications sensors.

The secondary calibration yields the frequency response of a sensor to waves of a type normally encountered in

acoustic emission work, namely Rayleigh waves. The source producing the signal used for the calibration is

mounted on the same surface of a test block as the sensor under test (SUT). The sensitivity of the sensor is

determined for excitation within the range of 100 kHz to 1 MHz. Sensitivity values are usually determined at

frequencies approximately 10 kHz apart. The units of the calibration are volts per unit of mechanical input

(displacement, velocity or acceleration).

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