Dräger Panorama Nova S-PE/ESA Gebrauchsanweisung Seite 20

Checking the opening pressure of the exhalation valve
If using the Quaestor test unit, the opening pressure must be at least
4.2 mbar with a constant flow of 10 litres/minute through the mask. If
not, replace spring and repeat test. If using test equipment that does
not permit this constant flow rate (e.g. Testor), the minimum opening
pressure must be 4.5 mbar.
After testing
1. Disconnect the adapter.
2. Remove the mask from the test head and dry it if necessary.
3. Fit the exhalation valve cover. Ensure that it engages.
4.4 Special maintenance and care
NOTICE
i i
Required tools are listed in chapter 8 on page 22.
4.4.1 Replacing the visor
1. Unscrew screws (1),
hexagon nuts.
2. Remove the mask/helmet adapter.
3. Pry the visor frame apart at the joints
with a screwdriver, and then pull the top
and bottom halves apart.
4. Remove the support plate if necessary
(see chapter 4.4.2 on page 20).
5. Detach the old visor from the rubber
frame.
6. Insert the new visor first in the upper and then in the lower half of
the rubber frame.
The midposition markers on the visor must line up with the seam
on the mask body.
7. Pull the rubber frame to the right and left over the rim of the visor.
20
hold tight
1
x
2
(approved by Dekra Exam)
8. Moisten the outside of the rubber frame and the inside of the visor
frame with soapy water.
9. Press on the visor frame, top half first, then lower half.
10. Insert the support plate if necessary.
11. Make sure that the rotation axis of the mask/helmet adapter (2) is
below the visor frame splitting.
12. Screw together the mask/helmet adapter and the visor frame using
the screws and hexagon nuts and three plastic washers. Tighten
until the distance (x) between the clamping pins is 3 to 0.5 mm.
4.4.2 Replacing the equipment connector
1. Pull the inner mask out of the groove in the threaded ring.
2. Open the clamping ring with a screwdriver.
3. Remove clamping ring and the parts underneath it (slip ring and
support plate).
4. Pull the equipment connector out of the mask body.
5. Fit the new equipment connector with speech diaphragm and
inhalation and exhalation valve and insert the equipment
connector so that the midposition markers of the equipment
connector and mask body line up.
6. Fit the slip ring and new clamping ring.
7. Attach the hook to ensure the tightest possible fit of the clamping
ring.
8. Push the support plate between the clamping ring and the slip ring;
fit it into the lower visor frame and align.
9. Compress the nose on the clamping ring with pliers until the
equipment connector is securely fitted in the mask body.
10. Attach the inner mask. Make sure that the edge is positioned in the
groove all around. The midposition markers of the equipment
connector and in the inner mask must line up.
Panorama Nova S - PE/ESA