As of 2026, the most current version of the standard is ASTM E83-25 "Standard Practice for Calibration, Verification, and Classification of Extensometer Systems," a 2025 edition that explicitly includes "calibration" in its title to reflect modern practices. The previous version, ASTM E83-23, is now historical.
State whether measurements are recorded in SI units or US customary units. 2. Verification Apparatus & Traceability
: 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) astm e83 pdf
The ASTM E83 PDF document provides a detailed framework for laboratories to estimate uncertainty. The standard practice covers the following key aspects:
The system uses five primary classes: Classification Relative Error of Gage Length (% of Gage Length) Fixed Error of Gage Length (in. or mm) Relative Error of Strain (% of Strain) Fixed Error of Strain (in./in. or mm/mm) Class A ±0.0001 in. / ±0.0025 mm Class B-1 ±0.005 in. / ±0.125 mm Class B-2 ±0.010 in. / ±0.250 mm Class C ±0.020 in. / ±0.500 mm Class D ±0.040 in. / ±1.000 mm Class E ±0.080 in. / ±2.000 mm Selecting the Right Class for Your Application As of 2026, the most current version of
While summaries are helpful, owning the official is necessary for ISO 17025 accredited labs and quality control departments. The full document contains:
Immediately following any .
ASTM E83 is a standard practice established by ASTM International. It outlines the procedures for the .
The ASTM E83 standard outlines a comprehensive framework for evaluation. It breaks down into several core areas: 1. Scope and Application The standard practice covers the following key aspects:
: Step-by-step methods for calibrating extensometers against known reference displacements, such as calibrated micrometers or gauge block systems.
The difference between the displacement indicated by the extensometer and the true displacement shown by the calibration device is calculated. How to Access the ASTM E83 PDF Safely and Legally