When the Class H tester is connected to analysis software, the operator gets much more information than a simple absorbed-energy value. The software records the full force–time or force–displacement profile from the moment the pendulum hits the specimen until the pendulum completes the swing. This curve shows how the material reacts during each stage of fracture: initial contact, elastic response, crack initiation, crack growth and final break.

With instrumented pendulums, the software can highlight key points such as maximum force, pre- and post-maximum energy, arrest force and brittle-fracture initiation force. These markers help engineers understand whether a material fails in a ductile, semi-ductile or brittle mode.

The ability to zoom, compare curves, and overlay multiple samples also helps identify batch variation, heat-treatment problems or anomalies in production materials. In short, software analysis turns a single number into a detailed fracture signature, giving labs clearer insight into real material behavior.

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