of the measured strain value. Used in extremely high-precision applications. High-accuracy, with a maximum error of
In the field of materials testing, accuracy in measuring strain is crucial for determining fundamental properties such as Young’s Modulus, yield strength, and elongation. , officially titled Standard Practice for Verification and Classification of Extensometer Systems , serves as the foundational document for ensuring that the instruments used to measure these properties are accurate, reliable, and standardized across industries.
This article is provided for educational and reference purposes. For regulatory compliance and commercial use, always refer directly to the current official ASTM E83 PDF purchased from an authorized distributor. astm e83 pdf
According to the PDF, she had to perform three verification runs at five different displacement levels. Each reading had to fall within ±1% of the true value for Class B-1, or ±2% for Class B-2. Her lab’s old extensometer, the one with the loose spring and the dented blade, had never been verified. She’d assumed "calibrated last year" on the sticker meant forever.
: A system that ranks extensometers into classes (e.g., Class A, B-1, C) based on their maximum allowable measurement error. of the measured strain value
Dr. Varma looked up, then at the papers, then back at her. A tiny smile cracked his beard. "You read it."
"Then you know you also need a calibrated micrometer for the fixed gauge-length check." , officially titled Standard Practice for Verification and
ASTM E83 has evolved over several decades. The standard was first approved decades ago and has been revised multiple times to reflect advances in measurement science and testing technology. Older versions still referenced in some databases include ASTM E83-90, E83-98, E83-00, E83-00e1, E83-10, and E83-16. The 2016 version introduced significant clarifications and was superseded by ASTM E83-23 in February 2023. The most current revision, ASTM E83-25, was published in June 2025, marking an important update to align with modern testing requirements and terminology. The ASTM E83 PDF file size is modest (approximately 610 KB for the standard version and 1.2 MB for the Redline version), with a page count ranging from 16 to 18 pages depending on the edition.
Upon completion of the verification, a Certificate of Calibration is issued. The ASTM E83 report must include:
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