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Revision NEW
APECS™ 2.7
11 of 19
Date: 10 July 2008
APECS
™ OPERATIONAL
INSTRUCTIONS (v. 2.7)
DUAL LED HUD:
The dual LED configuration features two LEDs oriented
approximately 90 degrees apart to facilitate divers with various degrees of color
blindness. The upper LED is dedicated green and the lower LED is dedicated
Red. The blinking pattern is identical to the table above with the exception of a
PO2 of 1.0 will cause both the red and green LEDs to blink instead of one LED
blinking orange.
METRIC/IMPERIAL:
The
METRIC/IMPERIAL
menu allows the diver to choose
between metric and imperial units of measurement. This screen is only available
for the first two minutes after power on. Care should be taken that both the
primary and secondary system are set to the same setting to avoid calibration
problems.
Calibration Procedures
The APECS™ is a two point calibration system with high altitude oxygen sensor
adjustment. It is imperative that both the
MAXIMUM
OXYGEN
and
ALTITUDE
are properly set prior to calibration. This system allows the diver to set the PO2
level based on the diver’s altitude zone at time of calibration, the altitude ceiling
is 14,700 feet (4,481m) at PO2 of 0.12 ata. The APECS™ also has a sensor
millivolt output indicator displaying on both handsets during high point calibration
procedures to aid the diver in a proper loop flush. The first point of calibration is
ambient air and the second point is maximum oxygen. To best perform the
calibration procedure follow the pre dive check sheet and these instructions.
When you select the calibration menu the first screen also displays the
percentage of oxygen used for the highpoint and the altitude used for calibration.
This will normally be 100% and 000 when used with pure oxygen and the Head
Only Calibration Kit at sea level. Ensure this is set correctly, it may be adjusted
via the
SET OXYGEN PERCENTAGE
menu.
SET OXYGEN PERCENTAGE:
Adds the ability of selecting the calibration
oxygen quality percentage from 70-100%. This allows the user to safely use
oxygen of limited purity. This selection, like
CALIBRATE
, is only available within
the first two minutes after powering on the system. It is available on both the
primary and secondary systems. To enter the oxygen quality menu, depress the
MENU
button until the “
SET OXYGEN PERCENT
” is displayed. It displays the
current percentage the system has in its menu from recent or previous settings of
this entry. Selecting the
CONFIRM
button enters this function. The user can
decrement the current percentage to the next lower percentage, having a range
from 70% to 100%. Stepping beyond 100 decreases the percentage in
increments of one percent per button push i.e. 99, 98, 97 etc. There is a feature
of the switch hits called a long switch which is used for making large changes in
