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1. Calibrate the Header Stop Height (called Maximum Working Height in the AFS Pro 600 color display).
2. Perform Distance Calibration
3. Perform Moisture Calibration
4. Perform Weight (Yield) Calibration
5. (optional) Perform Area 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 doing the distance calibration, 200' is required. However, 400' is better. It is best to measure this with a tape and not a rolling wheel for accuracy. Your start and finish points should always be measured from the same spot on the combine. The distance calibration should be done in 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 4-5 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 4 calibration loads - 6 to 8 is even better! These loads will need to be harvested at different grain flow rates (low, medium, high). To reduce your grain flow you can adjust speed or your swath. DO NOT unload on the go during a grain weight calibration! Once you have completed 4 or more calibration loads, pick at least 4 loads with different flow rates, consistent error %, and that are less than 10% error if possible. Don't forget to "Apply Cal Values" to previously harvested loads if you want them to be adjusted with the new calibration data.

Common sources of error include moisture in connectors (often as a result of pressure-washing the vehicle), damaged wiring harnesses (got mice?), and a deflector plate clearance that is not within spec. Contact your Case IH dealer for assistance identifying these or other issues that might be to blame.

If you find that there is no mechanical issue with the machine and ALL of your grain weight calibration loads are consistently over 10% (but with similar error %), then it is usually safe to go ahead and calibrate with those loads. An example: You have 6 grain weight calibration loads at varying levels of crop flow. Your errors range from 12% - 13.8%. Select all 6 loads and calibrate. Since the error is consistent, this set of loads should produce acceptable calibration results.

Also, remember that if you use a semi trailer for 1 load, you need to use it for all your grain weight calibration loads, as the weights of each calibration load must be within a 5% range. The recommended weight for calibration loads is 10,000lbs.