is the standard practice for Verification and Classification of Extensometer Systems . This standard establishes procedures for the calibration and categorization of instruments used to measure length changes, typically for determining tensile or compressive strain in materials testing. Where to Find the PDF
: Definitions for terms like "calibration factor," "gauge length," and different types of extensometer systems (Type 1, 2, and 3). Verification Apparatus
Verification: Fixed and Relative Errors - Epsilon Technology
ASTM E83-23 (Published Feb 2023). A pending version, E83-25 , is scheduled for release in mid-2025.
The extensometer and the verification apparatus must be kept in the same environment for a specific period to prevent thermal expansion from skewing results. 2. Multi-Point Calibration