Great Plains 3N-4020 Operator Manual - Manual (Page 48)

44 3N-4010F/3N-4010HDF/3N-4020F Table of Contents Index Great Plains Manufacturing, Inc.
196-359M Table of Contents Index 2013-10-29
Prime Seed Meters
Before running an actual calibration, it is important that
the seed cups be filled with seeds, and the flutes primed
to deliver seed at first rotation. Step 19 through step 30
executes a short calibration to do this.
If the cups are already primed, skip to step 31.
Refer to Figure 48
19. Enter a small target amount.
Refer to Figure 49
20. It may take some experimenting to select a value
that avoids “TIME TOO LOW” errors.
Press FUNCTION button to return to step 19.
Note: If modest adjustments to the sample size continue
to result in HIGH/LOW errors, chances are some
other parameter is zero or incorrect by a large fac-
tor (such as decimal place error). To start over,
press OFF, and then ON.
Refer to Figure 50
21. The minimum time is 4 seconds. Select a time just
long enough to ensure that the meters are filled with
seed, and seed is flowing to all seed tubes to be
sampled.
Figure 48: Priming:
Set for Short Run Time
28308
Figure 49: Priming:
Time Limit Error
28257
Figure 50: Priming:
Short Cal. Mode Time
28309