VR Technology Limited
Analysing a Gas
Connect the sensor cable with oxygen sensor cell attached to the VR’s I/O port, place
the cell in the cylinder connection kit and attach the connection kit to the cylinder to
be analysed.
Switch on your VR.
In the Home Screen on your VR scroll through the mini screens until you reach the
SENSOR screen
There you will see the current oxygen percentage, the most recent oxygen percentage
saved and a PO2 bar graph.
Open the cylinder valve until you hear a gentle hiss. The O2 reading will start to
move.
When the reading is stable, a further short push of both switches saves the analysis,
you will see a saved icon next to the saved analysis and the GAS icon will appear in
the bottom right-hand corner of the screen.
A short push on the right-hand switch will take you into the Gas Adjust screen.
The gas number will be highlighted and you can change that number to place your
analysed gas into any position in the gas list you wish.
Short pushes of both switches will move the cursor on the screen until the analysis (
2nd line up) is highlighted.
You will then see a TRANSFER O2 icon in the bottom right hand corner of the
screen.
A short push of the right-hand switch will transfer your analysed gas to the designated
position in the gas list.
Then a long push of both switches saves it. You will need to make the gas active to
use it. If the analysed gas is the same as the gas already occupying the designated
position in the gas list then the transfer icon and Save O2 icon will not appear. (There
is no need to transfer what is already there!) For oxygen analysis at altitude, simply
set the analyser to 20.8 to 21% in air.
VR Dive Computer Operations Manual 2009 rev E 28/01/2009
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