Full Bucket Weight is not Accurate and/or Zero Moistures/Test Weight with Plenty of Grain

14 Jan 2025

Problem Description

I do not use or need test weight so I was not too concerned about calibrating test weight when I created a moisture curve. However, after completing the moisture calibration, the full bucket weight and chamber weight is not correct.  I get zero moisture when I know I have enough grain in the chamber and the moisture blade (or NIR sensor) is completely covered with grain.     

Solution

You may not want or need test weight, but calibrating test weight is required to give the H2 GrainGage the information needed to operate correctly. In addtion, when using the M2.0 moisture model, test weight is used when calculating moisture. For this reason, HarvestMaster recommends always using an accurate test weight measurment when calibrating moisture (see section 5 in the Mirus User's Guide for H2/H3 GrainGages: 5. Chamber Calibration).  

The process to ensure an accurate full bucket weight and full chamber weight consists of two parts:

  1. Calibrating with moisture and test weight with the first sample.
  2. Calibrating with the remaining moisture samples.

Regardless of whether you use or need test weight, calibrating with an accurate test weight measurement is vital in obtaining an accurate full bucket weight and full chamber weight. For further information, see section 5 in the Mirus User's Guide for H2/H3 GrainGages: 5. Chamber Calibration.

If the problem persists, contact the HarvestMaster Field Service Engineers. For contact information, see Contact a HarvestMaster Field Service Engineer.