Dräger Panorama Nova P Notice D'utilisation page 108

4.3 Tests and inspections
Inspect the facepiece in accordance with the inspection and
maintenance intervals.
4.3.1 Visual inspection of the speech diaphragm
The speech diaphragm and the O-ring must be clean and

undamaged; if not, clean or replace (see Chapter 4.4.4 on
Page 110)
4.3.2 Visual inspection of the inhalation valve
The inhalation valve is visible through the visor in the equipment

connector. Blow into the equipment connector to check whether
both wings of the valve disk move freely. Replace the valve disk, if
necessary (see Chapter 4.4.6 on Page 110).
4.3.3 Visual inspection of the exhalation valve
1. Pull off the exhalation valve cover from
the equipment connector.
2. Press one arm inwards and remove the
spring holder.
3. Remove the valve disk from the guide.
4. The valve disk and the valve seat must
be clean and undamaged. Clean or
replace if necessary.
5. Moisten the valve disk with water and refit. The valve disk must
slide into the guide under its dead weight.
6. Fit the spring holder and make sure that both arms engage at the
sides. It is marked with "L" = left and "R" = right and fits at an angle.
108
4.3.4
Perform the leak test with suitable test equipment, e.g. from the Testor
or Quaestor series.
(1) Checking for leak tightness
1. Moisten the inside of the face seal with water and fit the facepiece
2. If necessary, inflate test head until the face seal fits snugly all
3. Seal the equipment connector with the adapter.
4. If necessary, moisten the exhalation valve.
5. Generate a negative pressure of 10 mbar.
The facepiece is considered leak-tight if the pressure change after
1 minute is no more than 1 mbar. If not, perform (2).
(2) Test with sealed exhalation valve
1. Remove exhalation valve disk.
2. Insert exhalation valve plug and secure with spring holder.
3. Generate a negative pressure of 10 mbar.
4. If the pressure change is less than 1 mbar after 1 minute: remove
L R
(3) Leak test under water
1. Immerse the test head together with the facepiece in water.
2. Generate a positive pressure of approx. 10 mbar and rotate the
3. Take the test head with the facepiece out of the water, repair the
4. Remove the exhalation valve plug and fit the exhalation valve.
5. Repeat the leak test (1).
(Use Instructions for NIOSH-approved full facepieces)
Leak tests
to the test head.
round.
exhalation valve plug, insert new valve disk, and repeat the leak
test. If not, perform (3).
test head slowly underwater.
Escaping air bubbles indicate the source of any leak(s).
facepiece, or replace leaking components.
Panorama Nova P