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4.1 Completing an Airline (up to 10 bar) Test
Note:- The pressure dewpoint at the end of the test will be calculated on the recorded system
pressure.
For the majority of applications the system pressure can be left at this default setting, however if the
breathing-air system is distributed as breathing air at a different pressure to that being displayed this
should be entered at this stage.
Select (Airline < 40 bar) – note the maximum
pressure the instrument is rated to is 10 bar.
The F4500 can be configured with the Draeger
6728531 water tube for 2 different scales. Select
the appropriate water range: 50 to 2000 mg/m
for standard airline systems with a fridge dryer or
no dryer and 5 to 200 mg/m
incorporating desiccant dryers. Having selected
the appropriate range press the arrow key.
(This screen will not appear on the F4500ED)
With the flow control valve in the closed position
connect to the air supply to be tested. Ideally this
should be done by using the hose which normally
supplies the breathing apparatus. Fit the
appropriate adaptor to the Tester first and then
connect the supply hose to the adaptor.
A test can be carried out at any pressure between
2 and 10 bar.
Note:- If the unit is over-pressurised it will
automatically
shut
overpressure warning; it will then need to be
returned to the manufacturer for checking and
resetting.
Input pressure will be displayed on the measured
pressure bar graph and the adjacent display.
System pressure will automatically default to this
reading.
10
3
is for systems
down
and
display
3
is
an
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