Abstract: The system provides continuous compensation of dispensed volume in a pressure regulated flow control system to compensate for changes in material viscosity and component wear. Two counters are preset with a predetermined value. The first counter is decremented by pulses from a flowmeter on the outlet of the system while the second counter is decremented according to the input command. When the first counter reaches zero, the contents of the second counter are examined and the gain increased or decreased accordingly.

Abstract: Piston rings are tested for their effectiveness by removing the cylinder heads of an engine, and sealing one cylinder with a pressure cap. Fluid under pressure is admitted into the cylinder, and time required to dissipate the pressure is monitored. A long time to dissipate the pressure indicates good rings, and a short time indicates bad rings. The several cylinders are sealed an tested one at a time. The pressure cap has a tire valve therein so the conventional air hose can be used to pressurize the cylinder. Preferably, engine oil is placed into the cylinder before the pressure cap is put into place so it is the oil that must move past the piston rings. A hold-down for the pressure cap may be fixed to the engine block using a screw into one of the holes for the cylinder head screws.