B-4
ARC-6000
98-05012
R3
An optional radar ground speed sensor is available
from MID-TECH for applications where wheel slippage
and variations in ground conditions are a concern. The
radar sensor does not depend on ground contact and
is therefore unaffected by these problems.
Some applicators may already be equipped with a
ground speed sensor. If the sensor meets the accuracy
requirements of the ARC system, it can be adapted for
use with the ARC console. Check with your MID-
TECH
®
dealer, or the factory, regarding the adaptabil-
ity of a specific sensor.
3. Flowmeter
Liquid ARC systems require a flow meter in the main
boom feed line to measure flow rate and to determine
when changes are needed in the position of the flow
control valve. The flowmeter is an impeller device,
meaning a specific volume of liquid flowing through
the flowmeter rotates an impeller a specific number of
revolutions. The ARC system can count the revolu-
tions of the impeller very accurately, allowing the
console to calculate the exact flow rate of the liquid in
the applicator supply line.
Sometimes an applicator is already equipped with a
flowmeter. Existing flowmeters can usually be adapted
to work with the ARC System, as long as the flowmeter
is placed to measure the total liquid flow to the booms.
Check with your MID-TECH
®
dealer, or the factory,
regarding the adaptability of a specific flowmeter. Note:
Some flow meters may require a special adapter cable.
4. Flow Control Valve
ARC systems require a flow control valve to provide
automatic rate control. The console uses this valve to
control the chemical flow rate. To be effective in
controlling flow, this valve must be both fast acting
and precise in its movements.
The flow control valve may be a product valve,
controlling the liquid flow directly, or it may be a
hydraulic valve, controlling the speed of a hydraulic
motor driving the liquid pump.
AB
C
Fig. B-3. Ground
Speed Radar
Fig. B-4. Flow Meter
Fig. B-5. Flow
Control Valve
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