Audible Alarm Indications
Do not rely exclusively on the audible alarm system for patient monitoring. Adjustment of
alarm volume to a low level or off during patient monitoring may result in patient danger.
Remember that the most reliable method of patient monitoring combines close personal
surveillance with correct operation of monitoring equipment.
Depending upon the severity and type of the alarm condition, alarm priority tones with distinct
pitches are sounded by the speaker (see illustration on page 4‐3). When multiple alarms are
detected, the highest priority alarm is announced.
Once activated, an audible alarm indication continues as long as the alarm condition is present or
until you acknowledge the alarm by pressing the Audio Pause key or the Alarm key (or by placing
the MR400 in suspend mode).
Alarm Sound State Indication
Depending upon the current setting, one of three possible symbols are provided to indicate the
alarm sound state, which is displayed at all times in the information bar (see page 2‐14). Symbol
definitions for the alarm sound state are provided in the table below.
4‐4 Alarms Expression MR400 Instructions for Use
Fixed Pitch Mnemonic Notes
c c c – c c
c c c
Alarm Sound State
Alarm audio armed
Alarm audio paused
Alarm audio off