19
1.
Ensure the fine control
valve is in the off
position.
2.
Screw the fine control
valve and flow indicator
assembly to the gas
can. This is best done by
screwing the gas can
into the valve.
3.
Press ‘breath test’
symbol on screen to
start a breath test.
4.
When prompted by the
‘exhale’ symbol, open
the fine control valve or
regulator.
