Ag Leader Yield Monitor 2000 Operators Manual - Manual (Page 48)

Calibrating Grain Weight
Yield Monitor 2000
Ag Leader Technology
June 1997
3-12
The C1 number is set to eliminate extra pounds that would be recorded from
vibration when the separator is engaged and the combine is running empty.
The C1 number is set by the operator manually and will not automatically
change when the monitor is calibrated. Refer to the instructions on setting
C1 in the Vibration calibration section.
Calibration Loads The Monitor calibrates itself on the basis of actual load weights you enter
into the monitor. You obtain actual load weights by weighing the grain of a
load in the monitor on accurate scales (elevator, calibrated weigh wagon).
When you enter an actual weight for a load into the monitor, that load
becomes a calibration load. Any load (that has pounds of grain in it) in any
field in the monitor can be a calibration load at anytime.
Grain Flow Rate The monitor’s calibration can be very accurate because the monitor
calibrates a specific calibration value for virtually every level of grain flow
rate or amount of grain that goes through your combine that the flow sensor
is measuring. The grain flow rate that your flow sensor measures changes as
the travel speed of the combine changes or the crop yield changes.
Note: The monitor, however, can calibrate only for the grain flow rates that
were moving through your combine at the time the calibration loads were
harvested. You must change your grain flow rates (by varying travel speed
or swath width) from one calibration load to the next or grain weight will
not be measured accurately.
Calibration
Accuracy For accurate calibration results, you must obtain at least six calibration
loads (loads with actual weights). Each calibration load must be
harvested under a different grain flow rate by varying either your
travel speed or your swath width. You should achieve accurate calibration
results with no more than 10 to 15 calibration loads; if you do not,
something is wrong and you need to troubleshoot grain weight calibration.
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