© Trynex International 2011 L1193
10
Calibration Instructions
To Calibrate your spreader close the gate completly then start to open
(notice the handle will move before the gate starts to slide.) As the handle
begins to actvate the gate slide watch the slide and just as it starts to
open then stop. At this point apply the calibration decal that is supplied as
shown below. You have now successfully calibrated your spreader.
Now put a small amount of material in the spreader to determine the
spread width of your product at the speed that you will be walking.
To determine your ground speed measure the distance you cover in 1
minute and reference the chart below.
Now you can refer to your calibration chart of Gate Settings and Pounds
per minute as a guide. (Due to the fact that material varies you may need
to make your own chart by setting your gate at a number and weighing
the amount of material that comes out in 1 minute and carry this out for
all gate settings.)
Sample Charts are available on Page 11
Exercise
: Let’s say you were in the
fi
eld and needed to apply 3.5lbs. of fertilizer per 1000sq. ft. Assume you were walking 3mph or 264ft per
minute and your spread width was 18ft., you would cover 4752sq ft in 1 minute. Then divide this by 1000 to get the thousands . Take 4.75
thousands X the application rate of 3.5lbs and this will give you the total of 16.63lbs. per minute needed to meet the application rate. Refer to
your chart to
fi
nd gate setting. In this instance you will need to set just slightly over 8.
Equation:
(Speed/Distance ft per minute)*(Spread Width)= Sq Ft covered per Minute
(Sq Ft covered per Minute)/ 1000 = Thousands
(Thousands)*(Application Rate)= Lbs per minute
Refer to your chart for required gate setting
Speed - Distance
Ground Speed In MPH FeetTraveled Per Min
0.5
44
1.0
88
1.5
132
2.0
176
2.5
220
3.0
264
3.5
308
4.0
352
Gate Setting Pounds per Minute Gate Setting Pounds per Minute
5
6.8 11
25.16
6
9.88 12
28.12
7
12.96 13
31.08
8
16.04 14
34.04
9
19.12 15
37
10
22.2
These settings were were obtained using a
10-10-10 Fertilizer
