The primary objective of ASTM E83 is to determine the maximum error of an extensometer system and assign it an accuracy class. This classification tells engineers and technicians whether the instrument is precise enough for specific testing standards, such as ASTM E8 (for metals) or ASTM D638 (for plastics). Key Terms Defined in ASTM E83
ASTM E83 is a standard practice published by ASTM International. Its primary purpose is to establish procedures for the calibration, verification, and classification of extensometer systems. An extensometer system includes the complete instrument: The sensor (the extensometer itself) The electronics (signal conditioners and amplifiers) The data acquisition system (software and readouts) astm e83 pdf
The verification process outlined in the ASTM E83 PDF involves comparing the readings of the extensometer against a highly accurate reference device, known as a calibration apparatus or displacement standard. Key Steps in the Verification Procedure: The primary objective of ASTM E83 is to
The (clip-on, non-contact/video, laser) you are using. Its primary purpose is to establish procedures for
An ASTM E83 verification cannot be performed using standard tools. It requires a specialized calibration apparatus, often called an or micrometer drum , which itself must be certified and traceable to a national metrology institute like NIST. Step-by-Step Procedure:
Often acceptable for materials with high elongation properties, such as plastics, elastomers, and certain composites, where absolute micro-strain precision is less critical. The Verification and Calibration Process
To ensure these devices provide reliable, traceable, and repeatable measurements, the industry relies on .