Using Yield Monitor? Read this first.

Posted on 05/13/2013 in AFS, Harvest.

AFS Pro 600 combineThis harvest, our Advanced Farming Systems (AFS) Yield and Moisture Monitor is the ideal way to measure moisture levels, grain temperature, grain flow and yield on Axial-Flow® combines. Before the season starts, you’ll need to calibrate the system for the best results. Here are some tips for calibration:

  • Stop height (maximum working height)—Always set your stop height for each crop type. It is best to do this with the appropriate header on the machine.
  • Distance—When performing distance calibration, 200 feet is required—but 400 feet is better. It is best to measure this with a tape and not a rolling wheel for accuracy. Always measure your start and finish points from the same spot on the combine. The distance calibration should be done in normal field conditions with a partial grain tank of crop.
  • Moisture—The moisture calibration must be done for each crop type. Remember to start a new load on the display and name it so you can easily identify it later as a moisture calibration load. Start with the grain tank empty and harvest until the “Instant Moisture” and “Average Moisture” readings are very close. Take four to five hand samples from the load and measure the actual moisture of each with an accurate, calibrated tester. Take an average of all the samples and enter this into the display as the “actual” moisture. Don’t forget to start a new load so you don’t add additional data to this load.
  • Grain weight—The grain weight calibration must be done for each crop type. Remember to start a new load on the display and name it so you can easily identify it later as a grain weight calibration load. Start with the grain tank empty, as well as an empty truck, wagon or whatever you will dump to. Each cal load should be at least 10,000 lbs. for best accuracy and they should be consistent in size. For best results, you will want to do at least four calibration loads—six to eight is even better. You’ll need to harvest these loads at different grain flow rates (low, medium, high). To reduce your grain flow you can adjust speed or swath. DO NOT unload on the go during a grain weight calibration. Once you have completed four or more calibration loads, pick at least four loads with different flow rates, consistent error percentages, and less than 10 percent error if possible. Don’t forget to “Apply Cal Values” to previously harvested loads if you want to adjust them to the new calibration data.