e/First-out alarm

Information
has gloss	eng: A first-out alarm is an alarm that indicates in some manner that it was the first of a series. This is necessary in circumstances such as an automatic trip or shutdown of equipment, where many alarms will annunciate as a result of a shutdown. The first-out alarm will clearly identify the root cause of the trip or shutdown.
lexicalization	eng: first-out alarm
instance of	(noun) an automatic signal (usually a sound) warning of danger alarm, alert, alarum, warning signal