______________________________________________________________________________________
Revision NEW
APECS™ 2.7
16 of 19
Date: 10 July 2008
APECS
™ OPERATIONAL
INSTRUCTIONS (v. 2.7)
Head Only Calibration Kit
The optional Head Only Calibration Kit offers the distinct advantages of a more
accurate gas environment for the sensors, is quicker, and uses less oxygen than
the loop flush method.
1. Perform all Pre-dive check procedures up to the step “Complete
calibration if necessary”. To complete calibration, all performance checks
prior to this need to be completed. Your oxygen tank should be analyzed
at this point.
2. Disconnect the quick disconnect O2 fitting from the manual O2 add valve
on the inhale counterlung.
3. Insert the male plug from the kit to the center hose mount base on the
head (inhale hose mount). Insert hose with flow restrictor into male plug
and snap the other end of the hose (flow restrictor) into the LP Oxygen
hose fitting.
4. Connect female cap from the kit to the male fitting on the bottom of the
head. Insert hose about 3/4” into the female cap. Connect other end to
oxygen analyzer.
5. Turn on oxygen bottle and observe the mv display on the handset and the
PO2 reading on the analyzer.
6. Once the mv reading has stabilized at the highest reading obtainable and
the analyzer reading matches the value obtained when you analyzed the
O2 cylinder press the
CONFIRM
button and the highpoint calibration is
complete.
7. Repeat the steps above for the remaining handset.
Note: You may only calibrate one display at a time under the following
conditions; you have not changed the sensors or performed any electrical
work, and the millivoltage is within the 7.0 to 13.5 mv ambient air
specifications. Calibrating one display can help insure that you have one
display to monitor the PO2 during the purge procedure to help insure that
you are achieving the proper loop PO2 for calibration.
Warning! After calibration, both displays must be within 0.05 ATA/Bar of
each other.
