Grain moisture meter calibrations are reviewed and updated periodically by the meter manufactures and other parties such as USDA/GIPSA and NTEP to maintain the accuracy of the meters in the grain trade. UGMA moisture meter calibrations are updated twice per year, every May 1st and August 1st.
If your Perten AM5200 shows “Service date has been reached” this is simply a helpful reminder that your meter does not have the latest USDA/GIPSA UGMA calibration updates installed. Updating the calibrations will clear the message. See our simple calibration update options below for your specific model.