Most day-to-day care for the Class H tester is simple: keep the test area clean, check that supports and striker faces are free of burrs, and verify that the enclosure, locks and interlocks work correctly. Operators should visually inspect the pendulum, bearings and striking edge on a regular basis, especially in high-volume labs. Any damage to the knife or supports should be addressed before more tests are run.

Calibration is mainly handled through indirect verification with certified impact reference specimens in line with ASTM E23 and ISO 148. Labs typically perform these checks at set intervals and after any mechanical changes. For instrumented versions, the force sensor and data chain should be verified according to the service instructions so the force–time curves remain reliable.

A full service visit is usually recommended on a yearly basis. During this, a technician checks the angle system, electronics, mechanical alignment and safety systems, and documents the results for the lab’s quality records.

Click here to learn more about the product or here to receive a personalized quote.