Chapter 2 – Seeder Settings
13
Regulator valve drive
A regulator valve (Reg valve) uses a motor to open or close the valve
depending on the flow requirements. Positive or negative power is
applied to run the motor. The tank output to the regulator valve stays
constant. The regulator valve either restricts or diverts excess product.
Control settings
l Sensitivity: Sets how frequently sampling is done. Standard
sensitivity is recommended. Reduced sensitivity is recommended
only if flow is highly irregular (for example, on worn equipment).
l Close valve when off: Ensures that the valve is closed when the
tank is not in use. This closes the valve when the Master Switch is
off.
l Reverse valve: Allows for the polarity of the regulating motor to be
reversed if it was wired incorrectly.
l Dump valve: Allows for the polarity of the dump valve to be set as
standard or reversed.
l Controller mode: Select from Standard, Micro-Trak, DICKEY-
john or Raven. Most liquid systems use the standard option. When
a controller mode is selected, the minimum on time, maximum on
time, gain setting and PWM settings are automatically set. These
settings can be adjusted if required.
l Min on time: The minimum time that power needs to be applied to
move the valve.
l Max on time: Sets the maximum time that the controller will send
a pulse to the control valve before checking the rate. It is used to
make a large correction for the rate.
l Gain setting: This sets how quickly the controller tries to achieve
the required rate. If set too high, the seeder may pass the target rate
and take time to adjust, searching for the right level. If set too low,
the valve will take a long time to move to the desired rate and
control will be slow to respond.
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