What safety measure must be performed daily for gas detectors?

Bump testing is an essential safety measure that must be performed daily for gas detectors to ensure their proper functioning. This process involves exposing the gas detector to a test gas concentration that is known to trigger an alarm response. The purpose of a bump test is to confirm that the detector responds appropriately to the presence of gas and verifies that the sensors are working accurately.

This daily check becomes crucial in environments where gas exposure can pose significant health and safety risks. By performing a bump test, miners and other workers can have confidence that their detection equipment is operational and that they will be alerted in case of a hazardous gas presence.

Calibration, while important, generally does not need to be performed on a daily basis. Full system checks may be performed less frequently or on a scheduled basis, depending on the manufacturer's recommendations, and sensor replacement is triggered by specific performance metrics, not by a daily requirement. Therefore, bump testing is the correct and critical daily measure that ensures gas detectors are functioning safely and effectively.