The extensometer and the verification apparatus must be kept in the same environment for a specific period to prevent thermal expansion from skewing results. 2. Multi-Point Calibration
The standard categorizes extensometers into "Classes" based on their maximum error and repeatability. When you review an ASTM E83 PDF, you will see a table detailing these requirements: Relative Error of Gauge Length Fixed Error (whichever is greater) ±0.00001 in. Class B-1 ±0.0001 in. Class B-2 ±0.0001 in. Class C ±0.001 in. astm e83 pdf
is often sufficient for general tension testing where high precision in the elastic region is less critical. 🛠️ The Verification Process The extensometer and the verification apparatus must be
To comply with ASTM E83, a system must be verified using a calibration device (like a laser interferometer or a digital micrometer) that is significantly more accurate than the extensometer being tested. 1. Temperature Stabilization When you review an ASTM E83 PDF, you
ASTM E83 is a fundamental technical standard used by engineers, labs, and manufacturers to ensure the accuracy of extensometers. These devices are critical for measuring the strain and deformation of materials during mechanical testing.