To verify an extensometer, labs use an apparatus capable of introducing precisely known displacements. This calibration device itself must be calibrated and traceable to a national metrology institute, such as the National Institute of Standards and Technology (NIST), and must have an accuracy significantly higher than the extensometer being tested. 3. Classification System
Before testing, the extensometer and calibration apparatus must sit in the same environment to reach thermal equilibrium. Temperature fluctuations can expand or contract metals, ruining the calibration. 2. Setting the Gauge Length
While ASTM E83 does not specify a mandatory recalibration interval, industry best practices and quality system standards such as ISO/IEC 17025 generally require: astm e83 pdf
ASTM E83 is an essential standard for any laboratory or organization that performs mechanical testing requiring accurate strain measurement. By establishing uniform procedures for verification and classification, it ensures that extensometer systems provide reliable, comparable data across different laboratories and applications.
ASTM E83 is the backbone of reliable strain measurement in material science. By strictly adhering to its classification metrics and verification routines, testing facilities guarantee that their data holds up to international scrutiny. To maintain compliance, ensure your laboratory always references the official, active ASTM E83 PDF. To verify an extensometer, labs use an apparatus
"I need time on the laser extensometer in the grad wing," she said. "And I need to redo my verification runs per E83, section 7.2.1."
Outlines what types of systems the PDF covers (including contact, non-contact, video, and laser extensometers). Setting the Gauge Length While ASTM E83 does
Understanding ASTM E83: Verification and Classification of Extensometer Systems (PDF Guide)
4. Evolution of the Standard: Optical and Non-Contacting Systems