Back to the Basics: Alarm Actions

An analyzer system should be reliable. At minimum alarm actions include an annunciator to notify the operator with a loud, unique sounding, horn or buzzer at the "warning" level, and relays to initiate a shut-down at the “danger" level.

The shut-down should include (as appropriate):

1. Stopping solvent input (stop conveyer, stop coater)
2. Heating (which slows vaporization and possibly prevents a source of ignition)
3. Increasing ventilation to a maximum