TeeJet ARC-6000 - Manual (Page 49)

C-5
98-05017
Rev.- 1
ARC 6000
CE & S
TANDARD
V
ERSION
C.2.2. RATE SENSOR INSTALLATION
The installer should refer to the detailed instructions shipped with the device being installed. MIDWEST TECHNOLO-
GIES recommends that the specific installation instructions be attached to this manual for future reference. Here are a
few general mounting tips.
The device must be securely attached to the shaft being measured. Any slippage will cause inaccuracies. Most of these
devices have a flexible stabilizing strap to keep them firmly in place (so they don't spin on the shaft). This strap should
be stiff enough to keep the sensor stable, but flexible enough to allow for normal misalignment of the shaft, sensor and
vehicle. The mounting strap should be secured to the same framework that supports the shaft being measured.
A common installation error is mounting the sensor so loosely that, at low rates the sensor rocks back and forth against
its stabilizing strap. When this happens, false signals are generated and errors are introduced.
C.3. FLOW CONTROL VALVE INSTALLATION
There are a number of different types of flow control valves capable of operating with the ARC system. The installer
should refer to installation instructions supplied with each device for information that applies specifically to that device.
MIDWEST TECHNOLOGIES recommends that these specific installation instructions be attached to this manual for
future reference. There are, however, a few general mounting tips which should be considered for any flow control valve
installation.
The Auto-Range® valve is the preferred option for controlling liquid flow. It is mounted between the product pump
and the boom manifold. The Auto-Range® valve has the advantage of controlling both boom discharge and bypass
flow at the same time. As the control console requires more flow to the boom, the bypass flow is throttled proportion-
ately. This allows the operator to take advantage of the full range of the pump output without manually adjusting a
bypass valve.
When a straight valve is used to control the flow of liquid to the sprayer boom, it must be mounted downstream from
the pump bypass line and at least twelve inches upstream from the flowmeter. The valve should not be mounted in a
low spot in the line, where water or sediment can collect and obstruct the valve by freezing or jamming. Select a
location that will protect the valve from physical damage.
The cable connecting the flowmeter and control valve to the ARC control console should be routed carefully to afford
maximum protection from abrasion or breakage. The flow control valve power cable must be connected directly to the
vehicle battery (12 VDC only). Attach the red lead (fused) to the positive post and the black lead to the negative post of
the battery.
Some applicators use a hydraulic control valve to vary the drive speed of either a liquid pump or a conveyor. The
installer should ensure that there is a sufficient hydraulic pressure available throughout the required operating range. A
common error in installation is lack of hydraulic oil flow. This causes the control system to lag and surge erratically.
C.4. GROUND SPEED SENSOR INSTALLATION
A variety of devices are capable of providing the actual ground speed information required by the ARC control console.
The installer should refer to the detailed installation instructions provided with the particular device being used. Attach
these specific installation instructions to this manual for future reference. There are a few general tips the installer should
be aware of.
Wheel Sensor: Be sure to mount the sensor on a non-driven wheel, making every effort to protect the cabling from
physical damage during field operations. Check to be sure the sensor magnets are securely attached, and that they are
mounted in the proper alternating sequence.
Radar Sensor: The most secure mounting is to use a metal bracket as described in the instructions for mounting to the
frame of the vehicle. Check to be sure there are no moving or rotating parts of the vehicle exposed in the field of view
of the radar sensor.