Datascope System 98 Service Manual page 16

. ALARM MUTE
Press to temporarily disable an active audible alarm for 30 seconds. This
control does not override the alarm. If an alarm condition is not corrected within
30 seconds, the audible alarm is enabled again. Alarm messages will remain
displayed while the associated audible tone is temporarily disabled. The LED
illuminates when ALARM MUTE is activated, and extinguishes when
ALARM MUTE 1s deactivated. In the event that a new alarm condition
occurs when audible alarm's are muted, the alarm tone will be immediately
reactivated.
System 98 Service Manual
Chapter 1, Operation