Document No. 715-7000
Revision E
Page 40 of 63
Step 1
- Calculate predicted change in oxygen percentage by multiplying the anticipated altitude
reading by - 4.71
10
-3
. Use this factor between sea level and 4000 feet. If the flying altitude
will be greater than 4000 feet above sea level, then use - 2.56
10
-3
factor. For example:
If the reading on the AeroNOx
is 60% at an altitude of 2000 feet above sea level, then to
calculate what the oxygen will be reading at a flying altitude of 8,000 feet above sea level you
would calculate as follows:
Calculated difference in Oxygen reading
= (-2.56
10
-3
) New altitude
= (-2.56
10
-3
) 8,000
= -20.5%
New Oxygen reading = Current reading - Calculated difference in Oxygen reading
= 60% - 20.5%
= 39.5%
Flow Meter Display
The flow meter display will be affected nominally with a change in the altitude. However, the
delivered and displayed NO will not change. The average change with flow meter displayed for
0.56 LPM at 2000 feet above sea level read 0.53 (SD=0.02) at 12,000 feet above sea level.
Alarms
Manually adjusted thumb wheel switches with 1 ppm resolution
NO: Low adjustable from 0 - 99, high adjustable from 0 - 99. Audible and visual alarm
when actual value is at set alarm value
NO
2
: High audible and visual alarm when actual value is at set alarm value. Factory
default setting for high NO
2
alarm is 11 ppm when thumb wheels are adjusted to 11 ppm
or higher (thumb wheels adjustable to 99 ppm).
Depressing the alarm silence button will deactivate the audible alarm, but not the visual
alarm, for one minute. If the alarm condition corrects itself, the audible and visual alarm
will deactivate. If the actual NO/NO
2
value reenters the alarm condition, the audible and
visual alarms will be activated, even if one minute has not elapsed since the alarm silence
button was pushed.
Sample Gas Flow
150
cc/min
15%
sampled gas is vented to the room through a vent located on the right-hand side of the
AeroNOx
Sample Inlet Pressure
Cyclic pressure up to 80 cmH
2
O (Ti = 3.0 sec. and 6.6 cycles per minute)
Expected Life of Life-Limited Components under conditions of typical clinical usage:
NO
Sensor ...................................min. 2000 hours
NO
2
Sensor ..................................min. 2000 hours
Oxygen
Cell .................................min. 2000 hours
Sample
Pump...............................min. 2000 hours