51
3.
CALCULATING "SPEED CAL"
1)
Place a chalk mark or tape onto the vehicle tire that the Speed Sensor mounted to it as shown below.
2)
Mark the initial spot on the ground.
3)
Drive vehicle straight ahead counting 10 full revolutions of the wheel. The mark must stop at the
same position it was in when the vehicle started.
4)
Measure the distance from the ground starting mark to stopping mark in inches [dm] (Round off
fractions).
5)
Write down this distance as the SPEED CAL number; keep it for future reference when program-
ming the Console.
NOTE:
This measurement is critical to the performance of the Console. MEASURE CAREFULLY.
Be sure tire is properly inflated before measuring. Measure tire in type of soil in which you
will be spraying. Circumference of tire will vary when measured in soft soil versus hard
packed soil. For best results, measure several times and average the results.
Large tires and very low speed applications may require additional magnets to insure accurate speed
readings. Any even number of magnets may be used as long as they are of alternating color and equally
spaced. After calculating "SPEED CAL", this number must be adjusted according to the number of
magnets used.
Normal Number of Magnets
Actual Number of Magnets
Example:
4
6
SCS 330, SCS 500 and SCS 550 normally use two magnets. All other consoles normally use four magnets.
x Speed Cal = Adjusted Speed Cal
x 1200 = 800
