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Mirus for H2/H3 Graingage User's Guide
Use grain at the ambient outdoor temperature for calibrating. If the grain samples
are cool (from air conditioning or cold storage), acclimate them by spreading
them out on a clean surface overnight. If you are calibrating outside, keep the
samples in the shade. Do not leave them in the sun to warm up.
Cycle the grain through the hopper or cyclone to reduce differences from grain.
Create precision. HarvestMaster recommends cycling samples multiple times and
averaging the readings for both the benchtop device and the GrainGage.
Use room temperature grain.
Create the known values by averaging the sample readings from the reference
device. Cycle each sample 3–5 times.
Create and use a moisture curve for each insert configuration you will use during
harvest.
Test in the reference device and in the GrainGage within an hour.
Use the sensor at harvest temperature. Bring the sensor to harvest temperature
by running the combine for at least 30 minutes before doing the chamber
calibration.
To create a moisture curve that is representative of the moisture range, encountered
during harvest, use samples of at least 6 pounds.
CAUTION: Do not re-wet grain samples. If you need to adjust the moisture
content, take a natural sample and dry it down.
Annually check and tune moisture curves. Checking and tuning moisture curves each
season will give you the best data quality.
Additional Preparation for Samples used with EM Sensors
Plan ahead for calibration. Creating an accurate moisture curve requires using grain
samples with a range of moisture percentages. Collecting enough samples to calibrate
properly requires advanced planning. HarvestMaster recommends planting grain
varieties that will be available for harvest before test plots are ready or harvesting border
plots early and drying them to varying moistures.
Collect and prepare samples.
• Use no less than three samples to generate a curve. The more samples the better.
• Use samples that vary in moisture by at least 3% (from lowest to highest moisture
content).
Moisture Curve and Chamber Calibration Wizard
To open the moisture curve and chamber calibration wizard,
1.
Go to Home > Setup > H2 or H3 GrainGage > Calibration.
2.
Tap Moisture curve and chamber calibration > Open Calibration Wizard.
5. Chamber Calibration
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