Manual Calibration Using Excel; Calibrate High Moisture Corn - Juniper HarvestMaster mirus H2 User Manual

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Mirus for H2 Classic GrainGage

4.4.9 Manual Calibration Using Excel

Note: This section is only applicable to the EM moisture curve.

HarvestMaster provides a spreadsheet for creating a two-point calibration online. It can be downloaded

here:

www.harvestmaster.com/data/files/mirus/EM2 Sample Curves

spreadsheet for creating the curve.

Note: This section is only applicable to the EM moisture curve.

When calibrating with high moisture corn samples, some moisture curves do not follow a linear voltage

relationship. HarvestMaster recommends manually adjusting the upper half of moisture curves with grain

samples above 26%.

To do this type of adjustment, start by using samples below 26% moisture to create a base curve as

described in 4.4.3 Chamber Calibration Overview on page 52.

Once you have a base curve, use 3–5 samples (multiple samples required) that are 26% and above to

manually adjust the top half of the curve:

1. With the moisture curve open, cycle samples above 26% through the GrainGage 3–5 times each.

Average the moisture readings for each sample.

2. Calculate the moisture percentage offsets.

The offset is the difference between the benchtop sensor's moisture measurement and the GrainGage's

moisture measurement.

For example, Sample One has the following moisture measurements:

• Benchtop sensor: 33%

• GrainGage: 31.8%

The offset would be 33% − 31.8% = +1.2%

3. If the average readings of the higher moisture samples do not match the moisture curve, average all

the sample offsets.

For example, if your benchtop sensor says Sample One is +1.2%, Sample Two is +0.8%, and Sample Three is

+1.0%, the average offset is +1.0%.

H2 Classic GrainGage Calibration

2018.xlsx. Follow the instructions in the

4. Open Mirus.

5. Go to Setup > H2 GrainGage > Moisture Curves.

6. Select the moisture curve you want to test.

7. Tap the edit icon

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