CONTOUR
12
3.7 POSITIVE PRESSURE
TEST
1. With the cylinder valve open, insert
a finger under face-seal and check for a
steady outward flow of air. Remove finger
and allow mask to re-seal.
2. Hold breath for ten seconds and
listen for leaks. If there are leaks, loosen
the head-harness and adjust the mask for
a comfortable leak tight fit and repeat
test. DO NOT over-tighten the head-
harness.
3. DO NOT USE apparatus that leaks.
Attach an explanatory note and return for
servicing.
4. When satisfied with the apparatus,
press the DV reset knob, remove the
facemask and close the cylinder valve.
3.8 WHISTLE TEST
1. With the cylinder valve(s) closed,
open the bypass knob briefly to vent air
from the system.
2. Check that the whistle sounds
clearly as the pressure gauge falls below
55 bar (±5 bar).
3. The apparatus is now fully tested
and may be stored prior to use.
Note:
Other warning whistle pressures may be
selected at purchase: 55 bar whistles
(green spot), 44 bar (red) and 68 bar
(yellow).
3.9 AIRLINE AND
DECONTAMINATION
ATTACHMENTS
1. Check the supply airline flow and
pressure. Remove connector dust caps
and check for wear and damage.
2. Make connection to an appropriate
connector capable of supplying
breathable compressed air (see Section
1.3 - Compressed Air Airline Supplies).
3. Check that the connection is secure
and that the connector releases easily,
without sticking.
4. Press the DV reset button.
5. Pressurise the attachment and
check all connections for leaks. On airline
attachments, check that the female
connector does not leak.
6. DO NOT use attachments that
show signs of excessive wear or damage,
or that leak excessively.
7. Replace dust caps.
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