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If air does not come into the mask, then it is in good condition and attached
correctly, the assembly of the mask with the filter is done hermetically.
If the air when breathing goes in the mask, then either the mask is not hermetic
or the connection of the filter with the mask is non-hermetic. In this case, you must
at first check the tightness of the connection of the filter with the mask. For that it
is necessary:
– disconnect the filter from the mask;
– close the hole by hand for connecting the filter;
– try to make 3–4 deep breaths.
If breathing is not possible, the mask is working, you wear the mask properly,
and the connection with the filter was done wrongly and non-hermetic. In this case,
you must re-attach the filter to the mask and repeat this test as described above.
If the air passes into the mask, so the mask has been fitted incorrectly or is not
in good condition. You must put off the mask and put it on again, or take another
one.
6.2.3 After use:
– disconnect the filters from the mask by turning the filters counterclockwise;
– wipe the sealer and the undermask from inside and from outside with some
slightly watered cloth and dry the Mask;
– wipe the both sides of the visor with some soft dry cloth.
7 Transportation and Storage
7.1 In between uses, the Mask shall be stored in a plastic bag in a clean and
dry place away from heaters avoiding the Mask exposure to moisture, mechanical
damage, and direct sunlight.
7.2 The conditions of storage and transportation of boxes with masks in terms of
the impact of environmental climatic factors shall comply with temperatures from
minus 50 °С to plus 50 °С. Maximum humidity during storage of masks 98 %. The
boxes with masks shall not be subjected to deformations and shock loads, exposure
to aggressive substances, harmful vapors.
7.3 The boxes with masks shall be stored in warehouses on pallets in stacks of
no more than six boxes in height. The distance between the piles is at least 0.8 m,
the distance from the heat-emitting devices is at least 1 m.
7.4 After storing the masks at air temperature below 0 °C, before usage the
masks shall be kept for at least 24 hours at air temperature (20±5) °С.
7.5 The boxes with masks are transported by all means of transport in covered
vehicles in accordance with the rules for the carriage of goods in force on this type of
transport. When transporting boxes with masks shall be secured to eliminate their
spontaneous movement. When loading and unloading, it is forbidden to subject the
boxes with masks to throws and strikes.