User manual SCUBAPRO-UWATEC OXY2

[. . . ] THE SYSTEM OPERATING MANUAL English Oxy2 SWISS MADE BY UWATEC AG English List of chapters Introduction . Checking the remaining battery and O2-sensor lifetime Checking the Oxy2 . Pairing of the Oxy2 with a dive computer . 4 5 6 6 7 9 10 11 13 14 17 21 21 24 25 26 26 26 28 3 English Introduction The Oxy2 is fitted "in line" to the inhalation hose of the semi closed rebreather (SCR) and measures the actual oxygen fraction of the inspired gas mixture. [. . . ] If the Oxy2 case has been opened you have to then wait 5 minutes after closing the case before you start to recalibrate. This prevents the calibration being affected by the influence of light. Switch it on and put the turnable switch to the position , , CAL" (calibration). The display shows the flashing , , CAL" symbol. It will remain visible until the turnable switch is turned back to , , RUN". If you want to calibrate with pure oxygen, you have to confirm that by bridging BE . Cal. Run · Using pure oxygen or oxygen enriched gas needs special safety measures! · If a calibration is performed with pure oxygen, no air should enter the space between the exit of the oxygen tank and the entrance of the Oxy2. 14 If you want to calibrate with air (20. 9% O2), switch with B-S confirm by bridging B-E . to 20. 9% and After the Oxy2 has passed the self test, the program starts with the automatic calibration procedure. The duration is between a few seconds up to approx. If the calibration was not completely successful the old calibration settings will still be valid and the display shows "­ ­ ­". In this case try to recalibrate again: turn the switch to , , RUN" and back to , , CAL". If the calibration is still not successfully completed the reason could be an unstable reference gas. Or if the display also shows the sensor symbol the O2 sensors could be exhausted and need replacing. After a successful calibration the Oxy2 indicates the ambient air pressure. This value has to be checked according to the following description: The absolute ambient air pressure relates to the actual altitude and the weather. It can only be measured by a barometer which is able to display the absolute air pressure. Barometers which only display the air pressure reduced to the equivalent sea level (normal) cannot be used. If you have no barometer on hand you can read out from the altitude reference curve the theoretical ambient pressure. Remove carefully the large O ring and carefully dry the O ring recess. Pull carefully the plugs out of the socket ( the tab, which stops the plug from falling out of the socket, has to be pulled back while pulling out the plug) · Do not pull on the wires! If the unit is running with an O2 sensor disconnected then, after a few seconds, the display shows "no". The unit switches off automatically after 10 minutes. Screw the O2 sensors out (anti clockwise) 8. Take the new O2 sensors out of their packaging and clean the sealing areas of the O rings. [. . . ] · Diving while at altitude can considerably increase the risks. Do not undertake high altitude diving without being specifically trained in special techniques for this diving. Pressure Chamber Tests · The Oxy2 must not be exposed to any pressure chamber test!See Warranty page 27. Warranty Please pay attention to the following remarks on warranty claims: Recognition of warranty: The warranty only covers units which have been provably bought from an authorised retailer or from the manufacturer. 26 Scope of the warranty: The manufacturer will repair all defects which are provably traceable to defects of material or faults in production. The warranty covers the repair of the unit free of charge, the replacement of faulty parts or the entire Oxy2, respectively. [. . . ]