combination a schematic flow diagram is shown connecting the mechanical and electrical functions the embedded computer 21 and the touch screen 23 provide electrical signals as indicated by the arrows a test sample is contained in the sample container 41 to make sure the sample in the sample container 41 is fully aerated an aeration pump 43 is turned on the aeration pump 43 pumps air through a dryer 45 where the air is dehumidified to remove moisture from the dryer 45 a percent relative humidify sensor 47 determines the humidity level of the pumped air and provides that information to the embedded computer 21 assuming the percent humidity of the pumped air is sufficiently low the test procedure will continue pumping air through the flow meter 49 and aeration check valve 50 into the sample container 41 during aeration flow meter 49 should record approximately 1 5 liters of air per minute since the flow meter 49 runs for approximately six minutes the aeration pump 43 will sparge approximately nine liters of air into the test sample this is sufficient time to saturate the test sample with dry air within the sample container 41 a sample temperature measurement 51 is taken and provided to the embedded computer 21 the sample temperature measurement 51 is to ensure that the test sample is between 15 u00b0 32 u00b0 c if the test sample is outside of this temperature range results can be impacted therefore if the test sample is outside this temperature range the embedded computer 21 would not let the test start once the test sample has been aerated and if.