Dräger Panorama Nova P Instructions For Use Manual page 13

Visual inspection of the speech diaphragm
Remove the speech diaphragm, see "Replacing the speech
diaphragm or O-ring" on page 14.
Visual inspection of the inhalation valve
The inhalation valve is visible in the equipment connector. Check
by blowing into it that both wings of the valve disc move freely.
Replace if seized.
Visual inspection of exhalation valve
Pull off the exhalation valve protection
cap from the equipment connection.
Press one arm of the spring clamp
inwards and remove the clamp.
Hold valve disc by the nipple and lift out
of guide.
The valve disc and seat must be clean and undamaged. Clean or
replace if necessary.
Moisten valve disc with water and refit. When the seat is
horizontal, the valve disc must slide into the guide under its own
weight.
Fit spring clamp and spring so that both clamp arms engage at the
sides. The clamp is marked "L"= left and "R" = right and fits at an
angle.
Leak tests
Test equipment and test accessories: Testor (R 53 400)
1)
(R 54 300) , adapter (R 53 345), exhalation valve plug (R 53 346).
(1) Checking leak tightness
Moisten the inside of the face seal with water and fit the mask to
the test head (see "Fitting the mask and checking its operability"
on page 10).
Inflate test head until the face seal fits snugly all round.
Seal the equipment connector with the adapter.
Generate a negative pressure of 10 mbar.
1) Note the corresponding Instructions for Use.
The mask is considered leak-proof if the pressure change after
1 minute is no more than 1 mbar. If not, perform (2).
(2) Test with sealed exhalation valve
Remove exhalation valve.
Insert exhalation valve plug and secure with spring clamp.
Generate a negative pressure of 10 mbar.
If the pressure change is less than 1 mbar after 1 minute: remove
exhalation valve plug, insert new valve disc and repeat the leak
test. If not, perform (3).
(3) Underwater leak test
L R
Immerse the test head together with the full face mask in the
water.
Generate a positive pressure of approx. 10 mbar and rotate the
test head slowly underwater.
Escaping air bubbles indicate the source of any leak(s).
Remove the test head and mask from the water. Seal any leaks
found.
Remove the exhalation valve plug and fit the exhalation valve.
Repeat the leak test.
Checking the opening pressure of the exhalation valve
If using the Quaestor tester, the opening pressure must be at least
4.2 mbar with a constant flow of 10 litres/minute through the mask. If
not, replace the spring and repeat the test. If using test equipment that
does not permit this constant flow rate (e. g. Testor), the minimum
1)
, Quaestor
opening pressure must be 4.5 mbar.
After testing
Press the button on the connector and disconnect the adapter.
Remove the mask from the test head and dry it if necessary.
Fit the exhalation valve cover. Ensure that it engages.
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