Overload Protection

In mechanical dynamometers, exceeding rated capacity can cause permanent spring deformation, which shifts the zero point and distorts all subsequent readings. In electronic dynamometers, it can damage the strain gauge element. Dillon AP dynamometers include overload protection to minimize damage from a single accidental overload, but repeated overloads will degrade the instrument even with protection in place.

Yes. Dillon AP mechanical dynamometers include built-in overload protection as a standard design feature — typically a mechanical stop that limits spring deflection to prevent permanent deformation from a single overload event. If you suspect your instrument has been overloaded, Dynamic Measurement Systems' repair service can diagnose and restore it.

Signs of overload damage in mechanical dynamometers include: the pointer does not return to zero when unloaded, readings are consistently high or low compared to a reference, or there is visible physical damage to the hook, body, or dial face. For electronic units, erratic readings or persistent error conditions can indicate strain gauge damage. If any of these signs appear, send the instrument to Dynamic Measurement Systems for repair and recalibration before returning it to service.