To certify an extensometer system to an ASTM E83 standard, a qualified calibration technician uses a specialized calibration apparatus (often called an extensometer calibrator). 1. Temperature Stabilization
The testing must take place in a temperature-controlled environment, as thermal expansion can alter calibration results.
Common for plastics testing and applications requiring moderate-to-high accuracy over larger strain ranges. astm e83 pdf
The extensometer, calibrator, and environment must sit in a temperature-controlled room (typically ) long enough to eliminate thermal expansion errors.
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 certify an extensometer system to an ASTM
The standard applies to instruments that indicate or record values proportional to changes in length corresponding to either tensile or compressive strain. It does not, however, serve as a complete purchase specification—meaning it doesn't tell you how to buy an extensometer, but rather how to verify that the one you have performs as required.
: Definitions for terms like "calibration factor," "gauge length," and different types of extensometer systems (Type 1, 2, and 3). Verification Apparatus By strictly adhering to its classification metrics and
“You’re a ghost,” she muttered to the PDF. The document had no interactive calculators, no decision trees. Just dense text and a note that “verification shall be performed in at least three directions of strain.” It was written for an era when engineers smoked at their desks and used slide rules.
When you buy a new extensometer, the manufacturer provides a certificate of conformance to ASTM E83. Using the , you can validate the certificate. Look for these three elements: