123
•
Active overpressure valve that, when detecting obstructions, is activated to reduce the
pressure in the respiratory circuit.
•
High Pressure Relief Valve is activated when the mains pressure is above 800 kPa (8.0 kg /
cm2) by sending the excess gas into the atmosphere. This will limit the ventilator supply
pressure.
10.18 Alarm System Specification
The alarm priority is determined by the device's risk management process.
Table 27 - Alarm Priority
Potential result of
failure to respond to
alarm cause
Potential Damage Onset
(1)
Immediate
(2)
Promptly
(3)
Late
(4)
Death or Irreparable injury
HIGH PRIORITY
HIGH PRIORITY
MEDIUM PRIORITY
Repairable injury
HIGH PRIORITY
MEDIUM PRIORITY
-
Mild injury or discomfort
MEDIUM PRIORITY
-
-
(1) Initiation of potential damage refers to the occurrence of the lesion and not to its manifestation
(2) There is potential for the event to develop over a period usually not enough for manual corrective action.
(3) There is potential for the event to develop over a period usually enough for manual corrective action.
(4) There is potential for the event to unfold in an unspecified period greater than that provided at the "prompt".
In this alarm system there is no change in the priority of the alarm condition and in the occurrence of
more than one alarm simultaneously:
•
High priority alarm messages are displayed alternately.
•
In the absence of high priority alarms, the medium priority alarm messages will be displayed
alternately
Alarm messages are displayed as soon as the alarm condition is detected, so there is no delay in
displaying the messages.
Table 28 - Alarms Characteristics
Alarm
Characteristic
High priority
Medium Priority
V
is
ua
l
Color
Red
Yellow
Intermittent frequency
1,6 hz
0,7 hz