Ag Leader PF3000 Harvest & Application Operators Manual - Manual (Page 128)

Calibrating Grain Weight PF3000
(Harvest Mode) Ag Leader Technology
April 2002 3-12
Before You Begin Calibrate the moisture before calibrating grain weight. Refer to the
instructions in this section for moisture calibration.
You must calibrate the monitor for grain weight (lbs) for each grain type
before the monitor will accurately measure bushels. You should be able to
calibrate the PF3000 for grain weight to an average error of 1 percent to 3
percent.
IMPORTANT: Before calibrating, you MUST check the clearance
between the tip of the clean grain elevator paddles and the inside of the
elevator housing at the top of the clean grain elevator. There must be ½
inch or less clearance as the paddle rotates around the top sprocket.
You do not have to calibrate grain weight at the beginning of the season to
get accurate results, although it is recommended. Each time you calibrate the
monitor, it will automatically correct all grain weights for all the loads of
that grain type that were previously harvested.
NOTE: Because the monitor measures the weight, not the volume, of the
grain hitting the flow sensor, test weight and different varieties should not
cause calibration inaccuracies.
Harvesting
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).
IMPORTANT: 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.
To vary the grain flow rate you should either vary the travel speed or swath
width for each calibration load.
NOTE: Varying travel speed and swath width are not necessary for
grass seed harvest.
Carefully follow these directions when harvesting your calibration loads.