What is the critical step immediately following the isolation of a high-energy system using Lockout/Tagout (LOTO) procedures to verify complete isolation?

The critical step immediately following the isolation of a high-energy system using Lockout/Tagout (LOTO) procedures is to verify that the isolation is effective. This verification step confirms that the energy source has been completely de-energized and that the equipment is safe to work on. This verification typically involves testing the equipment to ensure that no residual energy remains. For electrical systems, this means using a calibrated voltmeter to confirm that the circuit is de-energized. For hydraulic or pneumatic systems, it means verifying that pressure has been relieved. For mechanical systems, it may involve attempting to operate the equipment to confirm that it is no longer powered. This verification step is crucial because it provides a final check that the LOTO procedures have been properly implemented and that the equipment is truly safe before any work begins. It is a critical safeguard against accidental energization or release of stored energy, preventing potential injuries or equipment damage.