United States Department of Agriculture 

Agricultural Marketing Service 

Federal Grain Inspection Service 

Calibration Update August 1, 2023 

Explanatory Notes for August 1, 2023 Official Moisture Calibration Updates 

Small changes in “loading factors” were made to optimize agreement between UGMA-Compatible units and 

the UGMA Master system.

Refer to UGMA-Performance_August2023.pdf for the performance of the UGMA Master system to the Air 

Oven reference method for all grain groups prior to the 2023 harvest.

For grain groups with calibration updates, the following pages show the moisture changes resulting from 

applying the new loading factors to the 2022 crop data.

1. Official moisture calibration changes effective August 1, 2023 ............................................ 2

2. Effects of GAC2500-UGMA Calibration Changes (New minus Old) ................................... 2 

3. Effects of AM5200-A Calibration Changes (New minus Old) .............................................. 3 

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Explanatory Notes for Official Moisture Calibration Updates

Fall Crops

August 1, 2023

Page 2

1. Official moisture calibration changes effective August 1, 2023

This list only includes those changes that affect moisture results.

• DICKEY-john GAC2500-UGMA

• Long & Medium Grain Milled Rice

• Perten AM5200-A

• Long & Medium Grain Milled Rice

2. Effects of GAC2500-UGMA Calibration Changes (New minus Old)
Explanatory Notes for Official Moisture Calibration Updates

Fall Crops

August 1, 2023

Page 3

3. Effects of AM5200-A Calibration Changes (New minus Old)