Dräger Ray Gebrauchsanweisung Seite 68

Handling and Use
Preparation for diving
Use
Check the constant dosage device directly before every
dive.
6. Press rubber plug of dosage testing device firmly into
bypass valve socket.
7. Fully open flow valve.
Slowly open valve of Nitrox cylinder and take gauge
reading.The minimum pressure must be 50 bar.
8. Slowly close flow valve, hold metering tube in vertical
position and watch float. Throttle flow valve until float
does has rested.
Hold metering tube in vertical position, the minimum
indication corresponds to the optimum position. Take
reading. The biggest diameter of the float is relevant.
The measured value for the respective gas mix must be
within the marking.
Danger!
If reading is out of the range of flow rates
mentioned in the table below (Table 5.4) do not
use diving gear. Failure to do so may lead to serious
personal injury or death.
Cylinder pressure Min flow
bar/psi L/ min
50 / 750
100 / 1500
150 / 2250
200 / 3000
Table 5.4
Close valve of Nitrox cylinder.
9. Remove rubber plug from bypass valve socket and
connect breathing bag.
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Max flow
L/ min
6.50 8.90
6.75 9.30
7.25 10.00
7.75 10.80
5
Fig. 6.2 Complete assembly of dosage testing
device
Fig. 6.3 Measured value reading
Fig. 6.4 Use of the dosage testing device
Fig. 6.5 Metering test
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