15
(3) Underwater leak test
z
Immerse the test head together with the full face mask in the water.
z
Generate a positive pressure of approx. 10 mbar and rotate the
test head slowly under the water.
Escaping air bubbles indicate the source of any leak(s).
z
Remove the test head and full face mask from the water.
Seal any leaks found.
z
Remove the exhalation valve plug and fit the exhalation valve.
z
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 full face
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 opening pressure must be 4.5 mbar.
After testing
z
Remove the adapter.
z
Remove the full face mask from the test head and dry it if
necessary.
z
Fit the exhalation valve cover. Ensure that it engages.
Special maintenance and care
Replacing the visor
z
Full face mask with metal visor frame:
Unscrew the screws whilst holding on tightly to the hexagon nuts.
z
Full face mask with plastic visor frame:
Unscrew the screws.
z
Use a screwdriver to pry apart the clamping frame at the joints,
then pull the top and bottom halves apart.
z
Remove the support plate if necessary (see “Replacing the
connector” on page 15).
z
Detach the old visor from the rubber frame.
z
Insert the new visor first in the upper and then the lower half of the
rubber frame.
The central markings on the visor must line up with the seam on
the mask body.
z
Pull the rubber frame to the right and left over the rim of the visor.
z
Moisten the outside of the rubber frame and the inside of the
clamping frame with soapy water.
z
Press on the clamping frame, top half first.
z
Insert the support plate if necessary.
z
Full face mask with metal visor frame:
Screw the screws into the hex nuts and tighten them until the
distance between the clamping pins is 3 to 0.5 mm.
z
Full face mask with plastic visor frame:
Insert the screws and tighten them until there is no longer a gap
between the upper and lower visor frames.
Replacing the connector
z
Pull out the inner mask.
z
Use a screwdriver to open the clip.
z
Remove the clip and also the slip ring and support plate.
z
Pull the connector off the mask body.
z
Fit the speech diaphragm and inhalation and exhalation valves to
the new connector and insert the connector so that the centre
markings of the connector and mask body line up.
z
Fit the slip ring and new clip.
z
Hook the clip into place so that it is as tight as possible.
z
Push the support plate between the clip and the slip ring; fit it into
the lower visor frame and align.
z
Use R 53 239 pliers to squeeze the tip of the clip until the
connector fits tightly in the mask.
z
Press the inner mask back into place. In doing so, ensure that the
entire edge fits in the groove. The centre markings on the
connector and the inner mask must line up.
Summary of Contents for Panorama Nova PE/ESA
Page 1: ...Panorama Nova PE ESA de Gebrauchsanweisung 2 en Instructions for Use 10...
Page 18: ...18...
Page 19: ...19...
