Hardi AutoHeight Instruction Book Download

Page: 41 / 62

5 - Operation

Five is the normal setting. At the start of operation, before the sprayer is warmed up, a lower

Sensi

setting may be

required for stable control. As the sprayer warms up, increase the

Sensi

setting up until the performance reaches an

optimum level.

NOTE! Running AutoHeight at high sensitivity will increase heat build-up of the oil. Specially when AutoHeight
system is used with tractors that have an open centre system without load sensing, it may require lower sensitivity
settings to avoid overheating of hydraulic oil. See “Hydraulic hook-up” on page 23.

Changing Between SOIL and CROP Mode

The SOIL or CROP mode setting can be adjusted in both MANUAL and AUTO modes. Toggle the "SETUP (NO)" switch twice
to view the current setting. While viewing this menu, use the "+/-" switch to change between SOIL and CROP mode. See
more in “Understanding Crop Mode And Soil Mode” on page 15.

Height sensors use “smart sensor” technology, which takes measurements from both the top of the crop canopy and from
the soil surface. This allows the user to select either “Crop” or “Soil” mode. In “Soil” mode the target height is measured from
the soil to the sprayer nozzle. In “Crop” mode the target height is measured from the crop canopy to the sprayer nozzle.
Crop mode is usually used when operating in mature cereal grains, row crops or specialty crops. Soil mode is generally used
to follow the ground through young crops, stubble or normal trash. Generally, if 60 percent of the ground is covered, crop
mode should be used. Sometimes either mode may be used, depending on the crop.

•

In row-crops, crop mode will work best with the sensor placed directly above a row. Soil mode will work best with the
sensor placed between two rows.

•

Crops in growing stages are relatively good targets for crop mode.

•

Bearded crops are relatively poor targets for crop mode as they are a poor reflector of sound.

•

Some crops will produce a more varying canopy than others. In these situations, the severe terrain option will provide
more representative measurements when in crop mode and better performance.

•

When mounting the boom lift height sensor, ensure the sensor does not measure behind a wheel or tramline, when
driving straight or turning. The crop behind a wheel will be flattened, resulting in inaccurate readings and poor crop
mode performance.

•

When operating in crop mode when the crop is lodged, or where there is no crop, the sensor will follow the target
down and begin to track the soil. However, when the crop resumes, the sensor may be beneath the crop canopy,
therefore preventing the sensor from making proper measurements. This situation may require the operator to
manually raise the boom.

Severe Terrain Mode

Some sprayers have the ability to fold in the boom tips and spray with only the inner sections of the boom (half folded). If
your sprayer has this ability and is equipped with a five sensor system (severe terrain kit) then this feature may be used when
spraying with the tips folded in.

Toggle "SENSOR DISPLAY" from the run screen until you see "

Tips on

". Toggle the "+/-" switch to turn it on or off. By

turning the tips off, the two outer sensors on the wings will be disabled and only the inner wing sensors will be used to
control the height.

When the tips are turned off, the run screen will show a lower case "

" in automatic to indicate the outer sensors are turned

off. The Severe Terrain Mode is defaulted to “

Tips on

” and will return to "

Tips on

" anytime the power is cycled.

When spraying with the full boom, the setting should be "