MSA AirGo - Visual, Function and Tightness Check; Checking the Warning Device

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Maintenance and Care MSA
54 AirGo
4.5. Visual, Function and Tightness Check
(1) Visually check the high pressure gaskets ( Section 4.7).
(2) Connect compressed air cylinder(s) to the back plate ( 3.2.1.1 and 3.3).
(3) Check all parts of the compressed air breathing apparatus for visible defects
or malfunctions, such as incorrectly assembled harness, loose compressed
air cylinders, incorrectly fitted lines, etc.
(4) Open cylinder valve(s) and check operating pressure on pressure gauge.
 The pressure values must read:
for 300 bar cylinders: minimum 270 bar
for 200 bar cylinders: minimum 180 bar
(5) Close cylinder valves.
 After 60 seconds the pressure drop in the pressure gauge must not
exceed 10 bar.
(6) Check warning device (signal whistle) ( Section 4.6).
4.6. Checking the Warning Device
(1) Connect lung governed demand valve to medium pressure line.
(2) Open cylinder valve(s).
 The pressure on the pressure gauge must be at least 120 bar.
(3) Close cylinder valve(s).
(4) Carefully activate flushing mode of lung governed demand valve
( Operating Manual for lung governed demand valve)
(5) Observe the pressure gauge.
 The warning signal must sound at 55±5 bar.
4.7. Checking the High Pressure Gaskets
Visually check the sealing ring of the cylinder connector in the pressure reducer.
Damaged sealing rings must be replaced.
4.8. Changing the Battery alphaMITTER / alphaSCOUT / ICU
Various components are designed for operation with power supplied by batteries.
For detailed information of changing the batteries refer to the alpha personal
network or ICU Operating Manual.
Attention!
Danger of injury!
There is a danger of explosion since the batteries can cause sparks
when being changed!
Never change batteries in hazardous areas.