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
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.
- 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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