The structural sensing device (the clips, arms, or optical sensors) The electronics (signal conditioners and amplifiers) The data acquisition software or readout display
: Laboratories seeking or maintaining ISO/IEC 17025 accreditation must prove their testing machines and extensometers are calibrated to a recognized national or international standard.
Procedures for calibrating your sensors according to certified methods.
Situation: You are testing 1018 steel to ASTM A370. Your extensometer was last calibrated 13 months ago. The clearly states in Section 8.2 that verification intervals shall not exceed one year.
The importance of ASTM E83 lies in its role as the .
In materials testing, precision is everything. To determine how a material behaves under load—whether it is steel, plastic, or a composite—engineers rely on tensile, compressive, and fatigue testing. The accuracy of these tests depends heavily on an instrument called an extensometer, which measures the precise changes in a specimen's length.
ASTM E83 is a standard practice that outlines the procedures for the verification and classification of extensometer systems. It establishes a strict methodology to determine the maximum permissible error for instruments used to measure axial strain during tension, compression, or fatigue testing.
To obtain an official, up-to-date copy of the standard, you can visit the . While some academic or institutional repositories might host older versions or discussions of the standard, the official version is a copyrighted document that usually requires a purchase. Key Aspects of ASTM E83
Following the data collection, the extensometer is assigned a class based on whether its maximum error falls within the thresholds for Class A, B, C, etc.. 4. Frequency
With this information, I can provide a more tailored compliance plan or calibration check-list. Share public link
The core of ASTM E83 is its classification matrix. The standard categorizes extensometers into "Classes" (Class A, B-1, B-2, C, D, and E) based on their maximum allowable error.
