Pressure Regulator in Bypass Mode ............................................................................................................................................................... 2
Pressure Regulator in Throttling Mode ......................................................................................................................................................... 3
Flow Meter .............................................................................................................................................................................................................. 4
Boom Control Valves ........................................................................................................................................................................................... 4
Speed Step 2 - Installing The Wheel Magnets ............................................................................................................................................ 6
Speed Step 3 - Installing the Magnetic Sensor .......................................................................................................................................... 6
Magnetic Wheel Sensor .................................................................................................................................................................7
Connect Step 2 - Making The Connection .................................................................................................................................................11
CHAPTER 3 PROGRAMMING 13
Important Preliminary Information..............................................................................................................................................................13
Steps to Successful Programming ................................................................................................................................................................13
SYSTEM SETUP MODE 14
Program Units ......................................................................................................................................................................................................14
Setting Your Program Mode (U.S., Turf, NH3, Imperial, S.I.) .......................................................................................................14
Reset To Default Settings ............................................................................................................................................................14
Sensor Type ...........................................................................................................................................................................................................14
Flow Meter or Pressure Based ....................................................................................................................................................14
Flow Meter Calibration .....................................................................................................................................................................................14
Flow Meter Pulses .......................................................................................................................................................................14
Maximum rating (P Hi) .................................................................................................................................................................15
Tips Per Boom Section ......................................................................................................................................................................................15
Number of Spray Tips Per Boom Section ....................................................................................................................................15
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844-E Sprayer Control
User Program Tip.................................................................................................................................................................................................16
User Programmable Tip ...............................................................................................................................................................16
Control Valve Type .............................................................................................................................................................................................. 17
Boom Control Valve Type: 2-Way/3-Way .....................................................................................................................................17
Program Specic Gravity ..................................................................................................................................................................................19
Required Speed to Achieve the Application Rate ................................................................................................................21
The Spraying Operation ...................................................................................................................................................................................23
No Flow Alarm .....................................................................................................................................................................................................24
Method 1 – Known Volume ............................................................................................................................................................................29
Step 1 – Known Value .................................................................................................................................................................29
Step 2 – Programming Calibration Number .................................................................................................................................29
Step 4 – Spraying Known Volume ...............................................................................................................................................29
Step 5 – Entering in New Flow meter Calibration Number ..........................................................................................................29
Step 6 – Double-checking the New Value ...................................................................................................................................29
Method 2 – Known Tip Size Method ............................................................................................................................................................29
Step 1 – Check Tip Size ..............................................................................................................................................................29
Unless otherwise noted, all other brand or product names are trademarks or registered trademarks of their respective companies or organizations.
Limitation of Liability
TEEJET TECHNOLOGIES PROVIDES THIS MATERIAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED.
NO COPYRIGHT LIABILITY OR PATENT IS ASSUMED. IN NO EVENT SHALL TEEJET TECHNOLOGIES BE LIABLE FOR ANY LOSS OF
BUSINESS, LOSS OF PROFIT, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS, OR FOR INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES OF ANY KIND, EVEN IF TEEJET TECHNOLOGIES HAS BEEN ADVISED OF SUCH DAMAGES ARISING FROM
TEEJET TECHNOLOGIES SOFTWARE.
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844-E Sprayer Control
CHAPTER 1 INTRODUCTION
Congratulations! And thank you for choosing TeeJet Technologies’ advanced 844-E sprayer control system. With its proper installation and
maintenance, you can enjoy many seasons of accurate and uniform spray application with ngertip convenience and ease of operation.
Installation and Programming of your control system will be covered in easy to follow, step-by-step instructions.
WE RECOMMEND THAT YOU READ THESE INSTRUCTIONS COMPLETELY
before attempting installation and programming of your 844 sprayer control. The unit’s performance will depend on its proper installation
and programming, along with planned preventative maintenance of your entire sprayer.
Easily Accessible
Programming Mode
is very user-friendly. The
process is made simple
with a series of easy-
to-follow, symbol-driven
programming steps.
Auto/Manual Control
gives the operator a manual
application option for fail-
safe reliability.
Master Shuto
controls all boom sections
with one switch.
Aluminum Console Housing
with sealed computer switch panel
resists electronic interference and
damage through rough handling for
years of reliable service.
A Large, Backlit Display
continuously displays all vital spraying
functions. With a quick glance, the display
reveals the application rate (automatically
switches between target and actual),
pressure, speed, and area covered.
Individual Boom Controls
give independent control of up to ve boom sections,
allowing better management of varying eld features
like waterways and terraces.
Color-Coded Tip Selection Bar
allows for easy user programming by
matching the color of TeeJet VisiFlo®
spray tips.
• Full-featured sprayer control with industry-leading ease of use
• Large back-lit display shows all spraying information at a glance
• Color-coded tip selection for easy programming
• Communication Port for PC and GPS interfacing
• Flow or pressure based regulation options provide reliability and exibility
• Five boom section switches plus master shutoff
• Built in application planning tool
• Durable, weather-resistant aluminum housing
• Single cable connection for quick hookup
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844-E Sprayer Control
CHAPTER 2 MOUNTING SPRAYER COMPONENTS
Pressure Regulator in Bypass Mode
All pressure regulating valves for the 844 will be wired for use in a bypass system. While plumbed in a by-pass mode, with the Auto/Manual
key in the “MAN” mode, the valve should close when the Plus key is
pressed and open when the Minus key is pressed.
The pressure regulating valve can also be mounted in a throttling
situation as an alternative location. Refer to pages 3 and 4, and Figures
3 and 4.
NOTE: The diagrams in Figures 1 and 2are shown as general
guidelines to follow when plumbing the 844 components. The
type of pump used and location of other components can
vary from sprayer to sprayer. It is important to ensure that if a
pressure transducer is used, it is located as close to the spray
tips as possible. Normally, this is at the boom control valves.
However, if one particular boom section is always used, the
pressure transducer can be mounted on that particular boom
section. If a flow meter is used, make sure that all of the flow
going through the flow meter is directed to the spray tips. Make
sure that proper distance is allowed on the inlet and outlet side
of the flow meter (refer to Figures 2 and 3).
Figure 1: Bypass Plumbing Diagram - Pressure Based System
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Figure 2: Bypass Plumbing Diagram - Flow Based System
844-E Sprayer Control
Pressure Regulator in Throttling Mode
The pressure regulating valve, as shown in the gures below, can be located in the supply line before the boom control valves. If you choose this
location, the 844 will need to be properly programmed to reverse the polarity of the valve. This step can be found in the System Setup instructions
on page 14. When in throttling mode, the valve should open when the Plus key is pressed, and close when the Minus key is pressed. Be
sure to check this before plumbing the valve into the system.
Figure 3: Throttling Plumbing Diagram - Flow Based System
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844-E Sprayer Control
Figure 4: Throttling Plumbing Diagram - Pressure Based System
Flow Meter
To ensure accurate readings, the ow meter (if used) must be mounted
10″ to 12″ (25-35 cm) from other pipe ttings, preferably in a vertical
position with the ow going up. It should also be mounted with the
direction of ow arrow pointing toward the boom control valves. Refer to
Figures 2 and 3.
Be sure the ow meter is plumbed so that all liquid passing through it
is routed to the booms and not back to the tank. When using three-way
boom control valves, refer to page 13 of this manual for programming
guidelines.
Boom Control Valves
The Boom Control Valves are connected in tandem and centered in
front of the boom sections. See the Control Valve Instruction Manual for
mounting instructions. If using three-way valves, refer to the instruction
manual of the valves you are using for valve calibration instructions.
Pressure Transducer
The pressure transducer (if used) should be installed as close to
the spray tips as possible. Normally this is at the boom control valve
assembly. Refer to Figures 1 through 3. Mount the unit vertically on a
short stand pipe to help protect the sensor.
NOTE: Pressure drop, to some degree, is found in most plumbing
systems. Pressure drop is created when there is any kind of
restriction in the spray line that reduces flow rate and is quite
often produced between the boom control valve assembly and
the spray tips. If one of the boom sections on the sprayer is
always used, the pressure transducer can be installed on that
particular boom section, minimizing any potential pressure drops
between the sensor and spray tips. If the pressure drop in your
system is greater than 5 psi (0.3 bar), you should consider this
as an alternative location for the pressure transducer.
Check all components to make sure they are mounted securely to avoid
excessive vibration.
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INSTALLING THE SPEED SENSOR ASSEMBLY
TIRE LUGS
Components
Two (2) magnets, Sensor with attached connector cable, and mounting
hardware. If you are installing a radar ground speed sensor, follow the
instructions supplied with that unit.
Speed Step 1 - Location
The speed sensor assembly should be installed on a non-driven wheel
to avoid potential errors that are likely to occur from a slipping drive
wheel. Refer to Figure 5.
Proximity Sensor (optional)
An optional proximity sensor is available to use in cases where space
is limited or for drive shaft mounting.
The proximity sensor will work by sensing any metal object. The
proximity sensor must be mounted so that the sensor face is within 1/8″
to 3/8″ (3-10 mm) of the metal object being read.
844-E Sprayer Control
Figure 6: Wheel Mounting of Magnetic Speed Sensor
CABLE
Figure 5: Wheel Mounting of Speed Sensor
NOTE:
TARGET FACES
Note: Target faces tire lugs
MAGNET
SENSOR
RIM
TIRE
98-70006-ENUS R4
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844-E Sprayer Control
MAGNET
Speed Step 2 - Installing The Wheel Magnets
Check for pre-drilled holes in the wheel rim. If pre-drilled holes are not
available, layout a pattern as shown in Figure 7 and drill two 3/8″ (10
mm) holes near the outer edge of the rim if possible, and 180° from
each other.
Place the magnets into each of the two holes on the inside rim and
securely fasten them using the nuts and washers provided.
Figure 7: Magnet Locations
WHEEL
TIRE
3/8˝ (10 mm)
HOLE FOR
Speed Step 3 - Installing the Magnetic
Sensor
The at, pressed L bracket of the wheel speed sensor kit should be
secured to a vertical member near the non-driven wheel. The round,
right angle steel bracket is then secured to the at bracket with the
two U-bolts and necessary hardware provided. The round, right angle
bracket is then used to secure the magnetic sensor mounting clamp.
The magnetic sensor should be inserted into the mounting clamp and
positioned within 1/8″ to 3/8″ (3-10 mm) of the wheel magnet. Tighten
the sensor clamp using the clamp screw per Figure 10.
Your installation will likely vary from the example. It may be necessary
to customize the installation to accommodate your specic machine.
Keep in mind that the two magnets must be spaced an equal distance
around the wheel. The magnetic sensor must be mounted in-line with
the magnets and positioned within 1/8″ to 3/8″ (3-10 mm) from each
After your wheel or proximity sensor is installed and once the 844
console is installed and powered up, you can test the speed sensor
installation. Connect the wheel speed or proximity sensor to the sensor
cable, and in turn connect the sensor cable to the 844 console. When
the connection is made, rotate the wheel on which the magnets are
installed. If using a proximity sensor, you will be sensing metal objects
and not magnets. Each time a magnet (metal object for proximity
sensor) passes the sensor a red LED (orange LED for proximity
sensor) on the back of the sensor will light. The LCD display on the
console will also indicate a speed as the sensor receives and sends
electronic pulses.
Radar
If you are using a radar speed sensor it should be connected to the
speed sensor connector on the sensor end cable. An adapter cable
will be necessary when using most radars and are available through
your TeeJet Technologies dealer. The 844 will automatically sense if
the speed sensor is a wheel speed, proximity type or radar type sensor
during calibration. The 844 is automatically adapted to most brands
of radar speed sensors provided that the appropriate adapter cable
is used. If using a radar sensor, the 844 will display rAd during the
calibration procedure.
MOUNTING THE TEEJET 844 CONSOLE
Console Step 1 - Location
Determine the best location for the control console in the cab or
operator’s compartment. Allow sufcient clearance, approximately 4-5″
(10-12 cm) to accommodate for the cable that will be connected to the
right side of the console.
Console Step 2 - Mounting
Mount the console to a rm support within the cab area, and secure
using the slots provided on the top, back, or bottom of the Console.
Although two simple brackets are supplied with the unit, some
additional bracketing may be necessary. The slots in the 844 will accept
1/4″ (6 mm) bolts.
Figure 11: Brackets Provide Angle Adjustment
98-70006-ENUS R4
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