Bedfont NoxBox - Page 29

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11. To test that each supply line
 iscorrectlysetup,performa
high-pressure leak test as
 follows:
a. Withthevalveopen,note 
where the pressure gauge
needle is pointing.
b. Closethecylindervalveand
 observethegaugefor30
seconds.
c. Iftheneedleremainsconstant,
 thelineiscorrectlysetup;
press the check mark.
d. If the needle shows a drop in
 pressure,aleakexists;press
the X.
12. If leak detected: If the line
has failed the high pressure
 test,theninvestigatethe
 connectionsforanyleaks:
a. Withpressureinthelines,use
liquid leak detector around the
regulator seal and hose
connections and look for
 bubblingintheuid.
b. Purge the hose line pressure
 beforeremovingand
reattaching the regulator to the
cylinder. The pressure gauge
should always read 0 bar
before disconnecting the
regulator from the cylinder.
c. Rule out leak in the
external regulator and supply
 line:Ensuretheregulator
supply line connector is
correctly locked to the
 regulatoroutlet,andthe
collar of the connector on
the free-end of the line is
 pulledback(sealed). 
 (seestep7).Openthe 
cylinder to pressurize
only the regulator and
 thesupplyline(freeendnot
 attachedtomonitor).Close
 cylindervalveandobserve
needle for 30 seconds.
d. Purgethehoselinepressure;
connect the free end of the
hose back onto the inlet port
on the monitor.