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45
Chapter 4 – Calibration
4.1. Product calibration modes
If using load cells, there are two calibration modes:
lDynamic: Constant, automatic re-calibration on-the-move.
lStatic: Calibration over a set distance. This mode may be useful if
spreading at low application rates or if the product is not flowing
freely. See Static mode calibration, page 53.
To select the calibration mode:
1. From the Spreader Settings screen, select Weight Setup /
Mode and use the left / right arrows to select the mode.
If the required mode is not available, ensure the software has been
configured for load cells (see Load cell configuration, page 29).
Note: Selecting MAN here is the equivalent to selecting MAN on
the main screen . The floor speed is then manually controlled
using + and – arrows and is not proportional to forward speed.
MAN mode is normally only used for emptying the spreader or
for checking that the valve and encoder are working correctly.
If not using load cells, during operation the product weight shown is
theoretical based on the floor (belt) speed and gate height. To perform
a calibration without load cells, see Performing calibration (with or
without load cells), page 47.
4.1.1. Dynamic mode
The system will normally be operated in Dynamic (DYN) calibration
mode. This method of calibration is particularly suited for products
with more variable density.
The weight of the product is constantly measured by the load cells.
The amount the actual weight has decreased is compared to the
theoretical weight decrease. The calibration factor is then adjusted to
speed up or slow down the floor (belt) speed accordingly. The
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