A quieter way to test the bell

An original fictional information text for reading practice.

The clock tower team once tested its repaired bell mechanism by running the full sequence repeatedly. That proved the motor could move the hammer, but neighbours could not tell whether the repeated ringing meant a celebration, a warning or a mechanical fault. The team now separates the checks.

During the first check, a temporary catch prevents the hammer touching the bell. The motor can complete its cycle while the engineer watches for hesitation in the linkage. A strip of paper beside the moving parts makes a small sideways movement easier to see. It is removed before the mechanism is used normally.

The second check is a single audible strike at an advertised time. Residents are told when to expect it so they do not mistake it for an unplanned signal. A volunteer listens from the far end of the square, where the engineer cannot judge the sound while standing beside the mechanism.

The result of each test is written in the maintenance book, including checks that reveal no fault. Otherwise a future engineer could not distinguish “tested and working” from “not tested”. The team keeps the quiet mechanical check and the audible sound check as separate entries because each establishes something different.

Explain why the team uses separate checks and records when testing the bell.