4
3.2 S
ENSORS
Three sensors are provided with your UC4+ boom control kit (with the
exception of certain kits). The sensors use an ultrasonic signal to measure the
distance to the ground, or the top of the crop. Three sensors are required to
provide good overall height management of the boom. Two sensors are
mounted on the outer sections of each wing (
Figure 2
). These sensors
maintain each wing at the set target height independently.
Figure 2 – UC4+ Sensor and Mounting Bracket
The third sensor (if applicable) is mounted on the main (center) boom
section. The main boom sensor is useful for setting your initial spray height
when you begin spraying in a field.
It is true that the main boom height will not change much, in consistent soil
conditions, since both ends of the main boom follow the height of the power
unit. However, it is extremely difficult to judge the boom’s actual height
accurately from the cab. It is also very difficult for the operator to see the
main section nozzles. It is common for operators to be in error from 20 to 30
cm (8 to 12 inches) or more (How often does the operator check nozzle
height with a tape measure?). The UC4+ control panel will give you an
actual height reading in the cab, and allow active control to the desired
height.
Another good reason for the main boom sensor is that soil conditions change
along with the weight of the machine. As the sprayer tank fluid level
changes throughout the day and soil conditions vary, the main boom height
will change because of the amount the tires sink into the soil.
Special attention must be taken into consideration when mounting the main
boom sensor, as explained in the UC4+ Installation Manual for your sprayer.
