Hollis Explorer User Manual - page 65
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PO
2
"Bad Cell" States:
• Cell input timed-out
• Cell input stale
• Calibrated sensor input > 3.00 bar
• Calibrated sensor input
• Raw sensor input
• Cell input excluded having failed calibration
• Calibrated cell input > 0.2 bar from the other two cells (only a single cell
can be in this state)
PO
2
"Do Not Dive" alarm states are:
No Comms
All PO
2
cell alarms are “No Comms”
Stale
Any PO
2
cell alarm is “Stale”
High Span
PO
2
cell span > 0.5 bar (if 0
*
, 2 or 3 cells in state “OK”)
Bad Cells
None or 1 cell in state “OK”
Very High
If 0*, 2 or 3 cells in state “OK” and average PO
2
≥ 2.0 bar
Low
If 0*, 2 or 3 cells in state “OK” and average PO
2
where; PO
2
= PO
2
– setpoint, i.e., the difference between the average PO
2
and the setpoint. The average PO
2
is based on the calibrated value from all
cells in alarm state “OK”.
* Zero cells “OK” with the same high/low alarm state, in which case all three are used in the
average.
3
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