Divesoft He/O2 Analyzer, Руководство пользователя

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He/O
2
Analyzer
| 5 |
Safety warning
Safety warning
This analyzer is designed for measuring the content of oxygen and helium in an air-oxygen-helium
gas mixture . It cannot be used to analyze mixes containing other gases, including, for instance,
mixes prepared using anything but pure gases or mixes in which air has been replaced with pure
nitrogen (without atmospheric argon) .
The physical and chemical principles of the sensors used do not guarantee that the sensors
will be selectively sensitive to a specific gas (oxygen, helium); there are a number of gases to
which the sensors respond . Therefore, the gas composition shown by the analyzer does not mean
by itself that the real composition of the mix is equal to the displayed values . The displayed mix
composition is invalid unless the mixing technology ensures that there are no other gases present
in the mix except air, pure oxygen and pure helium .
The analyzer is not a certified measuring instrument . The results of measuring are only
informative and it is not possible to use such results where a certified measuring instrument is
required .
When analyzing mixes in situations where the incorrect composition of the mixes could cause
material damage, injury to health or threaten human health or life, for example in the case of
breathing mixes for diving, the results of the analysis may not be used as confirmation of the
correct mix composition . In these cases, the analyzer can only be used as an aid for increasing the
probability that such incorrect mix composition will be detected before its use . The correctness
of the mix composition must be established by the technology used to prepare it .
The correct preparation of breathing mixes for diving (nitrox – oxygen-enriched air, trimix –
a mixture of air, oxygen and helium, heliox – a mixture of oxygen and helium) requires special
knowledge and experience which is possible to gain, for example, through an appropriate course .
A failure to apply such knowledge can lead to an incorrect mix, even though the results of the
analysis are seemingly correct . Such a situation can also be the result of a failure to take into
account the influence of temperature and compressibility, an insufficient blending of the mix
and other factors .
Please remember that the analyzer can be broken or damaged and that the oxygen sensor is
by its nature subject to ageing and thus its properties deteriorate .
Therefore always verify the measured data in another way, such as by precise preparation
of the mix, another analytical method, etc . In addition, the measured value must be subject to
critical assessment using a common-sense approach and if it differs from the allowable variation
of mixing accuracy, it must be considered invalid .