JBL ProFlora m500, JBL ProFlora m2000, JBL ProFlora u500: Is my system broken if there is a rapid and marked drop in cylinder pressure towards the end of the charge?
The rapid drop in the cylinder pressure shortly before the end of the charge does not constitute grounds for complaint. It is normal and unavoidable from a technical standpoint.
Reason: The cylinder is filled approximately halfway with liquid carbon dioxide. You remove gaseous CO2 from the cylinder; the corresponding share of the liquid CO2 passes to the gaseous phase; the pressure remains constant. It isn’t until less CO2 passes from the liquid phase to the gaseous phase that the cylinder pressure begins to drop.
This means your system is functioning normally.