Calibration

Proper calibration is important to get the most accurate measurements from your precision farming equipment. Documenting your calibration information will allow you to provide the correct data for Precision Claims. A producer must calibrate within 3% to meet the RMA calibration requirement.

  • Single-point: The last calibration needs to be within 3%. If a producer has been within 3% for the majority of harvest, and the last calibration is outside of the threshold, the producer will no longer qualify for a Precision Claim.

  • Multi-point: All calibration speeds need to be within 3%. At a minimum, five speeds must be recorded to qualify.

FMH Calibration Checklist

Use the FMH Calibration Report Form for multi-point combines or single-point combines to give you best practices and recommendations on calibration requirements, as well as a place to document your calibration records. Keep this in your equipment to record calibration adjustments.

 

During each yield monitor calibration, record the following:

  • Calibration Date and Time
  • Crop Harvested
  • Field Name – List the common field name (e.g., “Bob’s North 40”)
  • Scale Source – Source of the grain measurement (i.e., grain elevator, grain cart, etc.)
  • Machine Measured Weight – What is the combine showing for weight?
  • Scale Measured Weight – As measured by the scale source
  • Positive or Negative Weight Difference – Calculate the difference in weight
  • Current Calibration – Calibration factor on the precision ag equipment (i.e. GreenStar™ monitor) before entering the new weight
  • New Calibration – Calibration factor AFTER entering the new weight
  • Average Crop Moisture Percent - Average moisture for this load


Important Note: Maintain these records after harvest and provide them upon request to your FMH crop insurance provider.

Recommendations

  • Calibrate moisture sensors when harvest season is underway
  • Initially calibrate mass flow sensor at the beginning of the season for each crop, then calibrate as needed
  • Re-calibrate as crop conditions change significantly over the season (e.g., crop dry down, test weight, variety/hybrid change, crop field conditions change)
  • Calibration loads should be similar in size (3,000-6,000 lbs)
  • Use the same weight scales during calibration process
  • Before calibrating, be sure the grain tank and auger tube are completely empty. Be sure that the weigh wagon or truck hauling grain away from combine is also empty.

 

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