Both standards classify extensometers. ISO 9513 is
Frequently required for determining yield strength (offset method) and tension testing of metals.
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 astm e83 pdf
The standard defines procedures to verify that an extensometer—the device used to measure length changes in a specimen during tensile or compressive testing—is performing within specified error limits. Afnor EDITIONS Dimensionality
| | Typical Use Case | | :--- | :--- | | Class A | Highest precision; used in research, calibration laboratories, and critical applications | | Class B-1 | High accuracy suitable for most general testing requirements | | Class B-2 | Medium accuracy for routine quality control | | Class C | Lower accuracy for less critical testing | | Class D | Low accuracy for preliminary or educational use | | Class E | Lowest accuracy, with correspondingly higher permissible errors | Both standards classify extensometers
Many manufacturing industries (aerospace, automotive, medical devices) require ISO or ASTM compliance to sell products.
ASTM E83, titled provides the protocols for calibrating instruments that measure changes in length. It establishes a controlled procedure where known, highly
She clicked, and her ancient laptop wheezed.
The physical distance between the knife edges or sensors is measured using calibrated calipers or a specialized template to ensure it falls within the standard's allowable error.
Establishes precise definitions for variables like resolution , error , and compounding accuracy .
ASTM E83 is a standard practice established by ASTM International. It outlines the procedures for the verification and classification of extensometer systems.