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Extensometers are classified by the maximum allowable error. Common classes include:
ASTM E83 is a standard practice established by ASTM International. It outlines the procedures for the verification and classification of extensometer systems.
When an extensometer is verified, it must meet two conditions: astm e83 pdf
Verification: Fixed and Relative Errors - Epsilon Technology
is the definitive international standard titled "Standard Practice for Verification and Classification of Extensometer Systems." Published by ASTM International (formerly the American Society for Testing and Materials), it is the most widely recognized document governing how extensometers—the devices that measure strain in tensile and compression tests—are verified and graded for accuracy.
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When you buy a new extensometer, the manufacturer provides a certificate of conformance to ASTM E83. Using the , you can validate the certificate. Look for these three elements:
By respecting the standard and using the correct digital format, you ensure that every tensile test, every material certification, and every product you ship stands on a foundation of measurable, defensible truth.
: It covers any system that records values proportional to length changes, including traditional clip-on gauges and modern non-contacting optical systems. Limitations Extensometers are classified by the maximum allowable error
: This involves applying a series of controlled displacements to an extensometer using a calibrated apparatus (extensometer calibrator) and comparing the device's output to the reference.
The software or technician compares the target displacement against the extensometer’s readouts to compute the algebraic error. Navigating and Utilizing the ASTM E83 PDF Document