A standard Charpy test cycle on the Class H system is fast, especially when processing multiple samples. Loading the specimen and checking the notch orientation usually takes only a few seconds. Once the sample is in position, the pendulum is raised by the servo-motor automatically, removing the need for manual lifting. The machine reaches the preset starting angle quickly, and the operator initiates the strike.

The impact itself happens instantly. The energy value appears on the display right after the pendulum completes the swing, and the auto-return brings it back to the safe position without operator effort. In most cases, the entire sequence from placing the specimen to seeing the final energy result takes less than 10 to 15 seconds.

If the machine is instrumented, the software requires a moment to process the force–time curve, but even then the total cycle remains very short. This speed makes the Class H well suited for high-volume labs that test dozens or hundreds of samples daily.

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