Astm E83 Pdf Online

: Guidelines on how often these systems should be verified to ensure data integrity during tension or compression tests.

These classes are defined in Table 1 of the standard, which specifies both relative error limits for larger strain values and fixed error limits that apply at very low strain levels where relative errors would become unrealistically restrictive. This dual-limit approach ensures practical yet rigorous requirements across the entire measurement range.

Extensometer systems are classified into the following classes based on the magnitude of their strain measurement errors:

ASTM E83 is a, often referred to as "the standard for extensometer calibration." It covers the procedures used to verify the calibration of extensometer systems.

ASTM E83 is essential for any organization conducting mechanical testing where strain measurement accuracy is critical. Primary users include:

"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."

Establishes precise definitions for variables like resolution , error , and compounding accuracy .

The verification must take place in a temperature-controlled environment. Temperature variations can cause thermal expansion in both the extensometer and the calibration apparatus, skewing results.

In materials testing, precision is not just a requirement—it is a legal and structural necessity. Whether determining the yield strength of a new aerospace alloy or testing the elasticity of a polymer, engineers rely on exact stress-strain data. At the center of this data collection is the extensometer, a device designed to measure changes in a material's length.

It proves your equipment reads true strain values.

: Step-by-step methods for calibrating extensometers against known reference displacements, such as calibrated micrometers or gauge block systems.

An ASTM E83 certification is not permanent. To maintain compliance with quality management systems like ISO 9001, AS9100, or Nadcap, systems must undergo regular re-verification.