NOxBOXi Operating Instructions - Bedfont Scientific

®NOxBOX iOperating Instructions1 23 4Cylinder replacementEngage trolley brakes tostabilise system prior tochanging cylinder.Fully close cylinder valve.Detach hose from monitor anddepressurise on purge needle.Remove regulator from emptycylinder.5678Remove empty cylinder fromtrolley and replace with newsupply cylinder. Check theconcentration matches thevalue displayed on-screen.Attach regulator to newcylinder.Perform a leak test slowly.Perform a leak test: open the cylinder valveOpen thenthe close.cylindervalve thenclose. Observe gauge for 30Observe gauge for 30 seconds, needle should remainseconds, needle should stationary.remain sta>onary. Purge pressure from hose,then reconnect the hose toinlet port monitor. Open valveon cylinder fully.6www.bedfont.com