Dpi Sekur C607 E Manual page 25

in special cupboards. During drying pay attention not to expose the mask to direct contact
with hot parts or with hot air (warmer than 45°C) or to direct solar radiation in order to avoid
damages to rubber parts. Check that after cleaning operations no traces of detergent are
left otherwise repeat rinsing and drying. If the mask has been disassembled for washing, a
leak tightness test with test equipment has to be performed. If the mask has been exposed
to chemicals particularly toxic, biological or radioactive agents, maintenance has to be
performed by specialized personnel or by D.P.I. s.r.l. Maintenance and Assistance Service.
7.3
Disinfection
Mask disinfection is necessary when it is worn by different users in order to prevent hygienic
or sanitary problems. Disinfection can be performed in a container after cleaning or can be
performed by the equipment SONOREX SUPER RK514BH or RK1028CH which can be supplied
by D.P.I. s.r.l.. Keep in mind that detergent and disinfecting agent neutralize each other when
used at the same time, therefore baths have to be kept separate washing carefully the
container among the two. Disinfection can be performed only with authorized (disinfectant
cod. 4437.0360) 5% diluted in water. At the end rinse in running water and dry with the same
precautions as of paragraph 7.2.
8.
Tightness test with test equipment
In the event the mask has been disassembled in order to be cleaned or to have some
component parts replaced, a tightness test must be carried out. Before carrying out the
tightness test, make a visual check. Check valves, housing and rubber gasket in particular, in
order to make sure they are clean. Defective parts must be replaced. Mask which failed the
tightness test cannot be used.
8.1
Test rig
The test equipment consists of an inflatable dummy head, a mouthpiece connector, a test
rig, a plug to seal the exhalation valve and a plug to seal the threaded connector. The test
equipment, allows for a negative or positive pressure test. LABMATIC or LABTRONIC test
equipment can be supplied by D.P.I. s.r.l..
8.2
Testing
Place the mask to be tested onto the inflatable head (wetting the surface with water) and
tighten the head harness. Inflate until the head becomes stable and in good contact around
the sealing edge of the mask. If necessary, adjust better the head harness. Place the sealing
plug on the inlet threaded connector of the mask. Follow the test equipment instructions as
shown in its instruction manual.
8.3
Leak tightness of mask and exhalation valves
The mask and exhalation valves pass the tightness test when, with the exhalation valve
previously damped, after a 10 mbar (1000 Pa) negative pressure is created inside the mask,
the pressure change is not more than 1 mbar (100 Pa) per minute. If the test is positive,
remove the mask from the dummy head and dry it if necessary. The mask can be used only
after passing the tightness test.
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