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 Checklists & Resources

Self-Calibrating Verification Report

This document will help you track the information on self-calibrating monitor systems that is necessary for insurance purposes. This document does not outline the steps for a single or multi-point yield monitor system. For these, please contact your agent for the appropriate calibration form

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Single Point Calibration Checklist

This document will help you perform the steps necessary to properly calibrate a single point combine yield monitor system. This document does not outline the steps for a multi-point combine yield monitor system. For this, please contact your agent for the appropriate calibration report.

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Multi-Point Calibration Checklist

This document will help you perform the steps necessary to calibrate a multi-point combine yield monitor system. This document does not outline the steps for a single point combine yield monitor system. For these, please contact your agent for the appropriate calibration report.

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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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