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Fault Study Turbulent CO2
Bypass in Rebreather One-Way Valves(1.6MB)
Updated 14th Mar 2011 with extra material. An
important fault mode that affects pliable valves,
causing higher inhaled CO2 levels for the diver, and
distortion of scrubber endurance test data if the
fault is present or stimulated by the test. The report
includes evidence that the fault is not present in the
Open Safety ALVBOV. |
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Fault Study Effect of
Flooding on Breathing Resistance in Granular
Scrubbers (180KB)
Republished 2006 report, Effect of water ingress on
granular scrubbers. As little as 50g of water causes
considerable increases in work of breathing. |
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FMECA
Volume 1: Top Level (308KB)
Last updated 29th May 2009, covering the Open Safety
(OSEL) Umbilical, Incursion and OR_Apocalypse
rebreather models. |
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FMECA Volume 2: MTBF and
MTBCF of Electronics (52k)
Last updated 29th May 2009. |
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FMECA
Volume 2a: Supporting Excel File of Calculation
(248k)
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FMECA Volume 3: Electronics
(201KB)
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FMECA
Volume 4: Mechanical Components (4.5MB)
The FMECA of the mechanical component of Open Safety's
family of rebreathers. Last updated 21st Au August
2018. |
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FMECA
Vol 4 Appendix A: CO2 Sensor Window Analysis
(1.6MB)
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FMECA
Volume 5: Software and Firmware (568KB)
FMECA covering firmware and software in the Open
Revolution rebreathers and rebreather monitors. This
covers both primary FMECA and also correct by
construction features to avoid failures from design or
programming errors. |
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FMECA
Volume 6: Top Down Rebreather Faults (1.6MB)
The top down failure modes, including all failures
that could create a safety issue during a dive. This
document covers all types of rebreathers, and faults
on any rebreather type. Last updated 10th
September 2019. |
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FMECA
Volume 7: Rebreather Fault Tree Analysis (22.1MB)
The top down failure modes for a rebreather in the
form of a Fault Tree Analysis. Last updated 10th July
2009 |
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FMECA Volume 8: Rebreather
Communications (Umbilical Divers Only) (22.1MB)
FMECA for the umbilical diver's rebreather
communications, telemetry and thermal balance control
system. Last updated 10th July 2009 |