Dräger FPS 7000 Notice D'utilisation page 116

Maintenance
3. Clean all parts using a soft cloth with cleaning solution.
4. Thoroughly rinse all parts under running water.
5. Prepare a disinfecting solution consisting of water and a disinfecting agent.
Place all parts that need to be disinfected into the disinfectant bath.
6. Thoroughly rinse all parts under running water.
7. Dry all parts in the air or in a drying cabinet (max. temperature:
140 °F/60 °C). Do not expose to direct sunlight. Do not shake the facepiece
in order to remove water.
8. Mount the accessories if necessary.
5.2.3 Alternative cleaning and disinfecting procedure
1. Remove any accessories from the facepiece and clean them separately.
2. Prepare a solution consisting of water and combined cleaning and
disinfecting agent.
3. Immerse the facepiece in the solution. Make sure that all parts are wetted.
4. Thoroughly rinse all parts under running water.
5. Dry all parts in the air or in a drying cabinet (max. temperature:
140 °F/60 °C). Do not expose to direct sunlight. Do not shake the facepiece
in order to remove water.
6. Mount the accessories if necessary.
5.3 Leak tests
The leak test should be performed with an appropriate test device (e.g. the
Testor or Quaestor series).
When testing facepieces sized L or S, place the facepiece carefully on the
test head sized M, since the face seal is not optimally sealed at times.
Moistening the face seal facilitates exact donning because the facepiece can
slide better on the test head.
5.3.1 Checking leak tightness
1. Moisten the face seal and exhalation valve with water.
2. Mount the facepiece on the test head.
3. Make sure that the face seal fits tightly onto all parts of the test head. Inflate
the test head, if necessary.
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4. Seal the connector with the test adapter and produce a negative pressure of
10 mbar (approx. 10 cm H
✓ The facepiece is considered leak-tight if the pressure drop is less than
1 mbar per minute. If the facepiece is leaky, continue with the following
chapter.
5.3.2
1. Remove the exhalation valve.
2. Plug in the exhalation valve test plug.
3. Generate a negative pressure of 10 mbar (approx. 10 cm H
4. If the pressure drop is less than 1 mbar (approx. 1 cm H
remove the exhalation valve test plug and insert a new valve disc.
5. Repeat the leak test (previous chapter). If the facepiece is leaky, continue
with the following chapter.
5.3.3
The opening pressure must be at least 4.2 mbar (approx. 4.2 cm H
constant flow of 10 L/min. If the opening pressure is not reached, turn the valve
disc to remove dust particles, or the like, between the crater and the valve disc.
Repeat the test. If the opening pressure is still not reached, replace the spring
and repeat the test.
5.4
1. Check all parts for deformation and damage and replace them if necessary.
from the cap. It can simply be hooked into the cap again.
2. Perform a leak test after any maintenance work and/or replacement of
components.
5.4.1
1. Unhook the cap on both sides from the visor frame (see Figure F1-1 on
page 120).
2. Use your thumbs to press against the bottom part of the cap and remove it
from the fastening lugs (see Figure F1-2 on page 120).
Instructions for use | FPS 7000 Use Instructions for NIOSH-approved full facepieces
O).
2
Test with sealed exhalation valve
Checking the opening pressure of the exhalation
valve (P-type connector only)
Maintenance work
During maintenance work, the exhalation valve cover might be detached
Replacing the visor (Figures F1 and F2)
O.)
2
O) per minute,
2
O) at a
2