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Mirus for H2/H3 Graingage User's Guide
Chamber Calibration
Creating a calibration file (moisture curve) is an essential part of the harvesting process.
The calibration file you use must be created specifically for your harvest conditions.
Because the accuracy of your data depends on this calibration file, be extremely careful
and precise as you create it. Mirus makes the calibration file creation process easy, but
please note the following details about your sensor.
SCiO Sensor Considerations
The chamber calibration will create a SCiO Calibration File (moisture curve) that stores
the type of crop being harvested, the calibrated chamber volume, the number of inserts,
the offsets to the default SCiO data predictions, and other pertinent data. While Mirus
allows you to offset SCiO data using the Recalibrate feature within the calibration file,
HarvestMaster advises against offsetting. We recommend creating a calibration file
specifically for your harvest conditions as described in Create a SCiO Calibration File.
EM2/3 Sensor Considerations
M2.0 Moisture
The chamber calibration will create an M2.0 Calibration File (moisture curve) that stores
the type of crop being harvested, the calibrated chamber volume, the number of inserts,
the offsets to the default M2.0 moisture prediction, and other pertinent data. When
creating an M2.0 Calibration File, Mirus will automatically generate an EM Moisture Curve
within the same file. Although you will only see the M2.0 predictions during harvest, both
moisture methods (M2.0 & EM) are calculated and available for export.
EM Moisture
The chamber calibration will create an EM Calibration File (moisture curve) that stores
the calibrated chamber volume, the number of inserts, a relationship between the
output of the EM Sensor and a moisture prediction (a curve), and other pertinent data. If
the desired crop is available via M2.0, HarvestMaster recommends creating an M2.0
Calibration File and not an EM Calibration File.
Chamber Calibration Best Practices
Calibrate the slope and motion, bucket weight, and test weight load cell before the
chamber calibration adjusts the test weight chamber volume.
Maintain the air pressure at 75 lb (34 kg) during the chamber calibration. If necessary, run
the combine to maintain the air pressure.
Before harvesting, generate a chamber calibration (moisture curve).
Chamber calibrations:
Align the test weight with a benchtop lab sensor.
Align constituents (including moisture) if desired.
Correlate the number of inserts and crops used.
Set a temperature baseline.
If you add or remove low-volume inserts, you must recalibrate or create a new calibration
file (moisture curve) specific to your current setup.
With the release of Mirus 4.5.0 there are three ways to perform a chamber calibration:
5. Chamber Calibration
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