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 . 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. This information is displayed on the Oxy2 display and can be transmitted to a paired hoseless dive computer (Aladin® Air X O2). [. . . ] From the first time that a sensor contacts oxygen it starts to discharge. The actual remaining O2 sensors life can be checked (after the unit has been switched on) by bridging the contacts B and E . English · The remaining lifetime of an O2 sensor cannot be increased by disconnecting the sensor!On page 24 (maintenance and storing) you get information on how to store the Oxy2. Battery O2 sensors 13 Calibrating the O2 Sensors A new calibration is needed when: · The , , CAL" segment on the display is visible. 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). 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. 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". Take the new O2 sensors out of their packaging and clean the sealing areas of the O rings. [. . . ] To maximise the O2 sensor lifetime do not leave them in an oxygen enriched atmosphere except when it is necessary. · Unplugging the O2 sensors does not increase their lifetime!· Replace the battery if the remaining capacity would not be enough for the planned dives. 24 Technical Information / Features · · · · · · · · · · · · · · · · · · · · · · Maximum depth: 50m (164ft) Maximum altitude: 4000m (13120ft) Operating temperature: -10 °C up to 60 °C (14 °F to 122 °F) Oxygen percentage: 0. . . 100% O2 Oxygen partial pressure (measurement range): 0. . . 2. 5bar (0. . . 36, 26 psi) Resolution: 01% O2 Linearity: <3% Accuracy: < ±4% relative Selftest at startup Online oxygen sensor check Malfunction information Request for recalibration of oxygen sensors if necessary Oxygen sensor lifetime: approx. 4, 5 years @ 100 dives/year Oxygen sensors remaining capacity Battery remaining capacity Battery: Uwatec Offline measurement possible (display) Wireless data transmission to Aladin® Air X O2 2 dual (redundant) oxygen sensors (checking each other) (A11. 301) Adapter for oxygen calibration (optional) Exchangeable adapters for different SCR`s (optional) 25 English Diving in Mountain Lakes The Oxy2 adapts itself to the ambient pressure. · Diving while at altitude can considerably increase the risks. [. . . ]