Meeting Japanese automotive or electronic industry requirements.

An extensometer (optical, laser, or clip-on) tracks the distance between the gauge marks on the dumbbell piece to measure elongation without slipping interference. The machine records the continuous force-displacement loop until physical failure occurs. International Equivalents

Pneumatic or self-tightening eccentric roller grips are highly recommended. As rubber stretches, it thinned out; standard manual screw grips will slip. Extensometers vs. Crosshead Travel