SAFETY FEATURES
ROBD2 USER’S GUIDE SEPTEMBER 2016
27
If Low O2 Pressure is detected in the Ready mode, the system will display LOW O2
instead of READY, on the screen
In the Pilot Test Menu, if any of the Pilot Test keys (RUNPRG or PPT) are pressed
during a Low O2 Pressure condition, the system will display the following screen and
prevent the system from running in the Pilot Test Menu.
The system will once again function when pressure is restored above 12 PSIG.
Oxygen alarm
The O
2
alarm will sound for two different scenarios. The 02 alarm is only active for
the O
2
dump feature. After pressing the emergency oxygen dump switch, if the 02
has not reached 90% in 5 seconds, the alarm sounds. The alarm will remain active
until the emergency switch is turned off. Also, if during an O
2
dump, the oxygen
content drops below 90%, the alarm will sound.
Oxygen analysis
Using the onboard oxygen sensor, if the oxygen content, in any pilot test mode,
drops below 3.8%, the system will automatically turn on the oxygen dump and
display a warning message.
Overpressure detect
Using the onboard pressure sensor, if the pressure to the mask rises above 20” H
2
0,
the system will turn on the oxygen dump
Low air flow detect
The Air MFC (MFC1) has an alarm signal that activates if the internal MFC valve
opens to maximum capacity. This generally indicates that there is not enough
pressure on the MFC to satisfy the required flow rate. This would lead to elevated N2
levels in the breathing loop during normal operation. This feature uses the MFC
alarm signal to stop flow and provide 100% oxygen to the breathing loop. A message
appears indicated the failure.
PILOT TEST MENU
*LOW 02 PRESSURE*
*CANNOT RUN TEST*
RUNPRG EXIT
