Leak Tests; Maintenance Work - Dräger FPS 7000 Instructions For Use Manual

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.
4. Seal the connector with the test adapter and produce a negative pressure of
10 mbar (approx. 10 cm H O).
2
✓ 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.
Instructions for use | FPS 7000 Use Instructions for NIOSH-approved full facepieces
5.3.2 Test with sealed exhalation valve
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 Checking the opening pressure of the exhalation valve (P-type
connector only)
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

Maintenance work

1. Check all parts for deformation and damage and replace them if necessary.
During maintenance work, the exhalation valve cover might be detached
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 Replacing the visor (Figures F1 and F2)
1. Unhook the cap on both sides from the visor frame (see Figure F1-1
on page 94).
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 94).
3. Pull the cap from the facepiece.
4. Remove the screws from the visor frame (see Figure F2 on page 94).
5. Spread the frame apart, tilt it towards the front and pull apart sideways.
6. Detach the visor from the rubber frame.
Maintenance | enUS
O.)
2
O) per minute,
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O) at a
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