There are a large number of these documents: they will all be released but the review process means that these will appear gradually.
|
PPO2 Accuracy report (1.3M)
Verification Report on the accuracy of the oxygen readings, including the sensor compensation, used in the Open Revolution rebreathers, and operation of the active warning devices.
|
|
Oxygen Sensor Fusion Algorithm (2.7 Mb)
Verification Report on the oxygen sensor fusion algorithm used in the Open Revolution rebreathers, using EN 61508 processes.
|
|
Respiratory performance of ALVBOV in Open Circuit mode (536 Kb)
EN 250 respiratory performance measurements of the ALVBOV with Apeks and Apollo first stage regulators, and comparison with the Apeks TX100 as the industry performance benchmark.
European limit for WOB is 2.5J/L in EN 250:2000, and 3J/L in Appendix A1:2006. Measured WOB for the ALVBOV is 0.89 J/L, similar to the benchmark.
|
|
Pressure Gauge Maximum Depth Test (276 Kb)
EN 250 approval of pressure gauges covers their use only to depths of 50m. All Open Revolution rebreathers use Megasport pressure gauges where an analogue gauge is required. This report describes the test of Megasport gauges and their rating for use to 550m.
|
|
Work of Breathing and Breathing Resistance Compliance (5.79 MB)
This is a comprehensive treatise on the theory and practice of work of breathing and breathing resistance measurements for compliance purposes.
It provides data for all Deep Life rebreathers for all diving depths, and rebreather mouthpieces, with contemporary benchmarks. Updated 12th February 2009
|
|
Hydrostatic imbalance of Deep Life Open Revolution Rebreathers:
compliance assessment to EN 14143, NORSOK U101, NATO
STANAG 1410 and NEDU TA05-12 requirements (3.4MB)
Full test using production samples to design documentation revision in Bill Of Materials D3. Format and procedure follows that of hydrostatic tests on previous versions of these products, but with complete retest.
|
|
Breathable Volume of O.R. Umbilical, Incursion and Apocalypse Rebreathers with compliance to EN 14143:2003 (1.1MB)
Reports key test results, to ensure the breathing volume is accessible by the diver in all positions, and is sufficient. September 2009.
|
|
Accuracy in service of rebreather helium sensor(470KB)
Accuracy assessment of helium sensor, as a function of ageing, pressure, temperature and power supplies. September 2009.
|
|
Open Revolution single scrubber endurance to EN14143 and NORSOK U101, and effect of small variations in conditions. (697KB)
Scrubber performance of the single scrubber Open Revolution rebreathers, December 2008.
|
|
Safety Review of Rebreather Test Processes (8.6MB)
This considers the overall safety of the test and verification programme, concentrating on test chambers.
|
|
Verification of Variable Orifice Gas Injector Rev A (1.68MB)
Updated 2nd Mar 2007. This is the test and verification report on the Deep Life rebreather Gas Injector.
It contains the orifice and control model used to verify the operation of orifice based injectors.
A further report will be issued on the first production batch incorporating the modifications described.
|
|
Verification of Fail Safe Oxygen Dosing System in an eCCR (290KB)
Verification of the fail safety of the PPO2 control system, including both formal modelling and the results of empiral tests.
The results are relevant to mCCRs, needle valve CCRs and SCRs, as well as true electronic variable orifice injectors.
|
|
Oxygen Cells for Dive Applications:
Sourcing, Performance, Safety and Reliability.
Results of an 8 Year Study (4.5MB)
Last updated 23rd August 2009. An assessment of oxygen cells for rebreather applications.
|
|
Helium and Pressure Susceptibility of Components used in Electronic Systems (317KMB)
A screen of different generic types of electronic components for sensitivity to helium under pressure.
|
|
Power Systems 1: Saphion IFR18650e Li-Ion Cell Characterisation (1024KB)
Verification of the suitability of Valence Saphion IFR 18650e rechargeable Li-Ion cells for diving rebreathers, including the charge and discharge characteristics and the accuracy of Deep Life's battery life prediction algorithm when used with these cells.
|
|
Power Systems 2: Rebreather Power Supplies (312KB)
Verification and review of the power supplies in the Deep Life O.R. rebreather. This is report 2 of 4 on the O.R. rebreather power systems.
Report 3 of 4 is the brown out, drop out, over-voltage and watchdog functions, and is currently part of Volume 5 of the FMECA but will be split out shortly.
|
|
Deep Life Open Revolution Product: Commercial Diving Rebreather
design verification report: safety of umbilical terminator power systems under fault conditions (482KB)
Review and validation of power supplies in the Umbilical Terminator fitted to the rebreather for commercial diving applications. Report 4 of 4.
|
Formal Verification
