Technical Data - Dräger Ray Gebrauchsanweisung

Technical Data

Technical Data
Working principle
As a semi-closed rebreather, the percentage of brea-
thing gases remains constant regardless of diving depth.
It can, however, be influenced by heavy exertion, which
may have the effect of lowering the oxygen percentage
and raising the nitrogen percentage. For this reason, it is
important to always calculate maximum operating depth
(MOD) for oxygen toxicity purposes by use of the oxygen
percentage in the nitrox cylinder, which will tend to be
higher than that in the breathing bag, and to calculate
decompression obligation by the nitrogen percentage
present in the breathing bag, which will tend to be higher
than that contained in the nitrox cylinder. By doing this,
there is a built-in safety margin on both the MOD and for
decompression purposes.
Warning!
ALWAYS calculate the Maximum Operating
Depth (MOD) for oxygen toxicity purposes by
using the oxygen percentage contained in the nitrox
cylinder and NOT the breathing bag, but ALWAYS
calculate your decompression obligation by the
nitrogen percentage present in the breathing bag and
NOT the nitrox cylinder. Failure to follow this rule may
lead to serious personal injury or death.
The gas mixture is distributed by means of a second
stage hose to a port in the second stage. During periods
of elevated gas consumption, more breathing gas will be
supplied through an automatic bypass valve. The exhaled
CO is absorbed in the soda lime scrubber cartridge.
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