Cleaning apparatus effectiveness measuring system for a combine harvester

A cleaning apparatus effectiveness measuring system for a combine harvester used to measure the effectiveness of an airstream at separating material other than grain (MOG) from grain, the combine harvester comprising a plurality of separating concaves and grates, cleaning apparatus comprising an upper oscillating pan and an oscillating upper chaffer, and a blower, wherein the upper oscillating pan receives grain and MOG from the separating concaves and grates and delivers the grain and MOG generally downwardly and forwardly to the upper chaffer, and wherein the blower directs an airflow toward the upper chaffer, the measuring system comprising:

• a collection device configured to collect samples of grain and MOG from above the upper chaffer, wherein the collection device collects samples from a front of the upper chaffer rearward to underneath a forward edge of the upper oscillating pan, and further rearward a rear of the upper chaffer;
• a counting device measuring an amount of grain and an amount of MOG in samples collected by the collection device;
• and a computer receiving measurements made by the counting device and generating a signal to adjust the blower from the measurements received from the counting device.