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About This Item
Full Description
1.1 This practice covers requirements for the secondary calibration of acoustic emission (AE) sensors. The secondary calibration yields the frequency response of a sensor to waves of the type normally encountered in acoustic emission work. The source producing the signal used for the calibration is mounted on the same surface of the test block as the sensor under testing (SUT). Rayleigh waves are dominant under these conditions; the calibration results represent primarily the sensor's sensitivity to Rayleigh waves. 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).
1.2 Units-The values stated in either SI units or inch-pound units are to be regarded as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standards.
Document History
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ASTM E1781/E1781M-20
Standard Practice for Secondary Calibration of Acoustic Emission Sensors- Most Recent
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ASTM E1781/E1781M-19
Standard Practice for Secondary Calibration of Acoustic Emission Sensors- Historical Version
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ASTM E1781/E1781M-13
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Standard Practice for Secondary Calibration of Acoustic Emission Sensors- Historical Version
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ASTM E1781-08
Standard Practice for Secondary Calibration of Acoustic Emission Sensors- Historical Version
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ASTM E1781-98(2003)e1
Standard Practice for Secondary Calibration of Acoustic Emission Sensors- Historical Version
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ASTM E1781-98
Standard Practice for Secondary Calibration of Acoustic Emission Sensors- Historical Version