APPARATUS FOR MONITORING THE DISPENSING OF LIQUID

摘要

The system delivers a series of drops of liquid and is controlled to release each drop in response to a drop rate generator set at a selected drop rate desired to be delivered. Each drop actually delivered is detected. By comparing pulses derived respectively from the drop rate generator and from the actual drops delivered, any disparity between the rates will be detected. The disparity detecting means includes means which measures and is tolerant to a limited degree of measured disparity between the two rates. When the disparity between the two rates exceeds a predetermined degree, an alarm condition is established which can include conditioning the delivery means to positively arrest further delivery of drops. The delivery means operates in a manner to automatically compensate for excess drops or reduced drops fed during transient variations in the actual feeding or delivery of drops.