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ASTM-E1781:2008 Edition(Redline)

ASTM-E1781:2008 Edition(Redline)

$26.65

E1781-08 Standard Practice for Secondary Calibration of Acoustic Emission Sensors (Redline)

Published By Publication Date Number of Pages
ASTM 2008 9
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Significance and Use

The purpose of this practice is to enable the transfer of calibration from sensors that have been calibrated by primary calibration to other sensors.

1. Scope

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 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

E114 Practice for Ultrasonic Pulse-Echo Straight-Beam Contact Testing E494 Practice for Measuring Ultrasonic Velocity in Materials E1106 Test Method for Primary Calibration of Acoustic Emission Sensors

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