______________________________________________________________________________________
Revision NEW
APECS™ 2.7
14 of 19
Date: 10 July 2008
APECS
™ OPERATIONAL
INSTRUCTIONS (v. 2.7)
The following table illustrates the permissible altitude zones.
Altitude Zone in
FEET (Meters)
LoPO2
in AIR
HiPO2
at 100%
Oxygen
> 0 (0)
0.21
0.99
> 1,200 (380)
0.20
0.96
> 2,700 (840)
0.19
0.90
> 4,200 (1300)
0.18
0.86
> 5,700 (1750)
0.17
0.81
> 7,200 (2210)
0.16
0.76
> 9,000 (2740)
0.15
0.71
> 10,700 (3280)
0.14
0.67
> 12,700 (3890)
0.13
0.62
> 14,700 (4500)
0.12
0.57
Selecting the
CONFIRM
button at this point locks in the selected altitude zone for
this calibration, and displays
ALTITUDE SAVED
then returns to the main screen.
Once the altitude is set and the O2 percentage has been correctly selected, the
user can then proceed with calibration.
Once calibrated, the breathing mix PO2s should properly display regardless of
current altitude.
WARNING! Prior to accomplishing the low point calibration the diver
should remove the sensor carriage lid and ensure the sensors are properly
aired in ambient air.
During the pre dive check of the Megalodon the checklist will tell you to conduct
the air point calibration. After turning the power on, the diver will scroll through
the primary and secondary handsets menu and push the confirm button when the
option is found. On the primary and secondary handsets you will see the
following after selecting the calibration option:
CALIBRATE
, and above that, it
will ask “
ARE YOU REALLY SURE
?” You will see a
YES
or
NO
and you may
push yes to go on or no to cancel. At this point of calibration you have just
completed the calibration for air and the two minute time out is on hold for you to
complete the next phase of calibration. The millivolts of each sensor are actively
updated in real time on this screen.
There are two methods of high point calibration, the loop flush method and the
Head Only Calibration Kit (preferred).
