The 1200A Automatic Moisture Tester is calibrated based upon comparison to the air-oven method as specified by the official Grain Standards of the United States. It provides this equivalency, to the air oven, quickly and accurately. The 1200A determines the quantity of moisture in the grain sample by evaluating changes in its electrical characteristics due to the presence of moisture.  Using internally stored calibration data, the change is automatically displayed as percent moisture in the grain.