: It applies to both contacting and non-contacting (optical/video) extensometers and is compatible with both SI and US customary units because strain is a dimensionless quantity. Recent Updates (ASTM E83-23/25)
: A system that ranks extensometers into classes (e.g., Class A, B-1, C) based on their maximum allowable measurement error. astm e83 pdf
The standard categorizes extensometer systems into classes based on the magnitude of their error. This allows engineers to select an instrument that matches the precision requirements of a specific test. Accuracy Level Maximum Error of Strain Indicated Highest Accuracy Class B-1 High Accuracy Class B-2 Moderate Accuracy Class C Standard Accuracy Class D Lower Accuracy Class E Lowest Accuracy : It applies to both contacting and non-contacting
: Use tools like Adobe Acrobat , Microsoft Word, or Google Docs to open and save the PDF as an editable text or Word document. This allows engineers to select an instrument that
: The standard is designed to be flexible. It covers both SI and US customary units and applies to instruments used for both tensile and compressive strain.