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The outlines a standardized methodology to verify these systems. It establishes a controlled procedure where known, highly precise displacements are applied to the extensometer using a verified calibration apparatus. The errors between the displacement applied and the displacement read by the extensometer are then analyzed to assign a performance class. Key Revisions: ASTM E83-23 vs. ASTM E83-25
The technician applies a series of precise, incremental displacements via the calibrator. ASTM E83 requires at least two verification runs consisting of a minimum of 5 displacement points across the device's designated range. astm e83 pdf
The standard does not treat all extensometers equally. Instead, it divides systems into distinct based on their maximum permissible error. The class you need depends entirely on the sensitivity of your test (e.g., measuring high-rigidity ceramics vs. high-elongation plastics).
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Many engineering universities subscribe to ASTM Compass. If you are a student or faculty, check your library portal. Large corporations often have a "standards librarian" who can email you the PDF.
Note: Relying on unauthorized, free PDF downloads from third-party file-sharing sites poses risks, including outdated revisions, missing pages, or malware. The errors between the displacement applied and the
The PDF requires a minimum of 10 evenly spaced increments over the range of the extensometer.
It does not cover bonded resistance strain gages, which are instead addressed under Key Performance Classes
These are authorized resellers of ASTM standards. They often offer bundle deals if you need multiple standards (e.g., ASTM E8 + ASTM E83).