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Figure 3
5.4
Tightness Test of the Mask
The testing of the masks for tightness is performed using an applicable MSA test
device (e.g. Mask tightness test kit or SmartCHECK) in accordance with the relevant
operating manual.
1.
Fit mask tight onto the test instrument.
2.
Generate a negative pressure of 10 mbar.
3.
Measure the pressure change after 1 min.
The mask including the exhalation valve meets the requirements if for a moistened exhalation
valve and a negative pressure generated inside the mask the pressure change does not exceed 1
mbar in a minute.
Leaking masks must not be used.
5.5
Visual Test and Function Test
Visual Test
1.
Inspect the mask for possible damages like for example deformations, stickings or cracks. Valve discs,
especially exhalation valve discs, are crucial functional elements of the mask.
2.
Defective or damaged parts have to be replaced immediately.
Functional Test
After assembling the mask the mobile parts, especially the valve discs, have to be tested for unrestricted mobility.
6
Safekeeping and Storage
WARNING!
In order to avoid damage to or the deformation of the masks keep no additional loose objects in the mask container.
Failure to follow this warning can result in serious personal injury or death.
For the safekeeping of the mask the mask container should be used. This also applies to masks with installed
filters, except CO and NO filters.
MSA rubber products are protected by an anti-aging agent that can become visible as a light coating. This coating is
harmless and can be removed during cleaning.
To ensure a long life for rubber components, keep them in a cool, dry place that is protected from ultraviolet
radiation, according to ISO 2230:2002, Rubber Products – Guidelines for Storage.
GB
1.
Remove exhalation valve from the mask inside with the special tool (see
Figure 3
).
2.
Remove the exhalation valve disc.
3.
Replace the defective components.
4.
Reassemble the parts in reverse order.
5.
Perform a tightness test (→ chapter
6 Safekeeping and Storage
5.4
).
9
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