Bubble Counter Question

[kashifg]

hmm.. the pressure was not moving from 0, so something not quite right, i've arranged a replacement with the supplier, so will see how i get on once i have this.

 

[Tizer]

got a spare fire extinguisher anywhere to test? gonna need it one day anyway

 

[kashifg]

i havent, but i would have thought if the fire extinguisher was at fault, that the cylinder pressure wouldnt have registered at just over 50 then?

 

[Tizer]

cylinder pressure can stay at 50 even when its near empty, my old one, before i discharged it in the garden, was reading 50 and it took under a second to discharge it. i think this has something to do with the nature of its use and the siphon effect? Cant recall exactly, but a fire extinguisher keeps its pressure high till fully spent. (im pretty sure of that)