Alarm System 4 : An automatic or manually triggered system which detects and or communicates an out of control event or trend and alerts by audible or visual means to allow safe intervention
Safety 2 Safety S2S - A Gateway for Plant and Process Safety, The European Web Portal for Process Safety, USA 2003. http://www.safety-s2s.eu/modules.php?name=s2s_wp4& idpart=4&op=v&letter=all, (IndS - Amer) {458}