Measurement
14
Consider the following points if you measure
with the OxySpy:
•
The gas must be able to flow through both elas-
tic rings without resistance.
• Check the OxySpy in air before each measu-
rement by "flushing" it (moving it back and forth
for 1 minute in the air). If the displayed value is
not between 20.7 and 21.1%
O
2
, the OxySpy
has to be calibrated.
• The OxySpy must have a steady stream of the
gas until the displayed
O
2
% value has stabili-
zed.
• At the gas input (the rubber ring) make sure
that there is a good seal and that air can not be
sucked in.
1. Press one of the two rubber rings against the
tank valve.
2. Open the valve until you hear a gentle, uni-
form hiss and wait until the displayed
O
2
% value
has stabilized.
3. "Freeze" the display by briefly pressing the
push button. For confirmation the "%
O
2
" starts
flashing.
4. Close the tank valve.
What you
have to
under-
stand
English
Procedure
to measu-
re on
diving
tanks
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