3
LAYOUT OF BUTTONS / CONTROLS:
The Aero 551 features a 1.75 x 1 inch LCD display. The display is backlit
continuously. There is basically 1 button which can control the detector:
The red button at the top (marked RST) is the Test/Re-set button which can
be used to test or re-set the unit.
CO LEVEL ALARM ACTIVATION:
CO level alarm activated after: in PPM (Parts per million)
PPM
11 - 50
Display only, No alarm
50 – 70
04 minutes
70 - 100
03 minutes
200
02 minutes
300>
01 minutes
NOTE:
Concentration of CO in air Inhalation time and toxic developed
50 parts per million (ppm) Safety level as specified by the FAA
200 PPM Slight headache within 2-3 hours
400 PPM Frontal headache within 1-2 hours
800 PPM Dizziness, nausea, convulsions within 45 minutes
