Hollis Explorer User Manual - page 50
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OXYGEN SENSOR VOTING
VOTING METHOD
The EXPLORER has a method of automatically removing Oxygen sensors
from the PO
2
averaging and entering a fail-safe mode when it is not possi-
ble to resolve an inaccurate PO
2
reading.
!
NOTE: It is never wrong to bailout in response to a misunderstood
unit failure. "When in doubt, bail out." Proper bailout planning can
save your life.
Rules:
1. If a single sensor is below 0.15 bar or above 3.00 bar, then it will be
removed from the averaging — a ‘BAD CELL! DO NOT DIVE’ alarm will be
displayed if not diving, or ‘ASCEND! BAD CELL’ if diving.
Mandatory Diver Action: Ascend on rebreather.
Preferred Diver Action: Open circuit Bailout to surface.
2. If a sensor is less than 7 mV then it will be removed from the averaging
— a ‘BAD CELL! DO NOT DIVE’ alarm will be displayed if not diving, or
‘ASCEND! BAD CELL’ if diving.
Mandatory Diver Action: Ascend to surface on the rebreather.
Preferred Diver Action: Open circuit Bailout, ascend to surface.
3. If one sensor is +/- 0.2 bar away from the two remaining sensors then it
will be removed from the averaging — a ‘BAD CELL! DO NOT DIVE’ alarm
will be displayed if not diving, or ‘ASCEND! BAD CELL’ if diving.
Mandatory Diver Action: Ascend to surface on the rebreather.
Preferred Diver Action: Open circuit Bailout, ascend to surface.
4. If all three cells are removed from the averaging for the same reason
(i.e., all low or all high), then all cells will be used in the averaging (super-
seding rules 1, 2 and 3) — a ‘BAD CELLS! DO NOT DIVE’ alarm will be
displayed if not diving, or ‘ASCEND! BAD CELLS’ if diving.
Mandatory Diver Action: Ascend to surface on the rebreather unless super-
ceded by rule 7.
Preferred Diver Action: Open circuit Bailout, ascend to surface.