TeeJet 844 User Manual

Download

Installation, Programming and Operating Manual

Spraying Systems Co.

Cable Connections

BATTERY

CABLE

BATTERY

CABLE

LEAD

844 SPRAYER CONTROL

FLOW METER

(OPTION 1)

PRESSURE TRANDUCER

(OPTION 2)

SPEED

SENSOR

SENSOR END

CABLE

SENSOR

CABLE

LEAD

PRESSURE

REGULATING

VALVE

VALVE END

CABLE

VALVE

CABLE LEAD

BOOM

CONTROL

VALVES

Introduction 2

Sprayer Control Installation 4

Mounting Sprayer Components 4

Pressure Regulator in Bypass Mode 4 Pressure Regulator in Throttling Mode 5 Flow meter 6 Boom Control Valves 6

Pressure Transducer 6 Installing the Speed Sensor Assembly 7-9 Mounting the TeeJet 844 Console 10-12 Connecting System Components to the Control Console 13 Component Wiring 14-15

Programming Guidelines 16 Steps to Successful Programming 17 System Setup Mode 17

Programming Steps

1 Setting the Program Mode - U.S./Turf/NH3/Imperial/S.I. 17 2 Flow meter or Pressure Based 17 3 Flow meter Pulses 18 4 Pressure Transducer Maximum Rating (P Hi) 18 5 Pressure Transducer Low Pressure Calibration (P rEF) 19 6 Nozzle Spacing 19 7 Number of Spray Tips Per Boom Section 20 8 User Programmable Tip 20 9 Pressure Regulating Mode 21 10 Regulation Adjustment Speed 22 11 Boom Control Valve Type 22 12 Recording Speed Sensor Magnetic Pulses 23-24

Radar Speed Sensor Pulses

13 Distance Counter 24 14 Simulated Ground Speed 24 15 Liquid Specific Gravity 25 16 Communications 25 17 Minimum Regulating Pressure Setting 26

Application Setup Mode 27

Programming Steps

1 Target Application Rate 27 2 Nozzle Selection 27-28 3 Calculation Step 28-29

Operating Instructions

Sprayer Checkout 30 The Spraying Operation 31

Features

Boost Mode 32 Area/Volume Feature 32 Flow Rate Feature 33 Application Alarm 33 No Flow Alarm 33 Printing 34

Troubleshooting Guide 35-37 Flow meter Calibration 38-39 Terms and Conditions of Sale 40

Table of Contents

TeeJet is a registered trademark of Spraying Systems Co.

Congratulations! And thank you for choosing Spraying Systems’advanced 844 sprayer control system.With its proper installation and maintenance, you can enjoy many seasons of accurate and uniform spray application with fingertip convenience and ease of operation.

Installation and Programming of your control system will be covered in easyto-follow, step-by-step instructions.

Introduction

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 preventive maintenance of your entire sprayer.

The TeeJet®844 Sprayer Control package for pressure based systems could consist of the components shown in this photograph.

They include: (1) Computerized Control

Console

(2) Pressure Regulating

Valve

(3) Connecting cables,

plugs, and cable ties (4) Pressure Transducer (5) Speed Sensor Kit –

Magnetic type (6) TeeJet Agricultural

Spray Products

Catalog (not shown) (7) 844 Mini Manual

(not shown)

PRESSURE

TRANSDUCER

COMPUTERIZED

CONTROL CONSOLE

PRESSURE

REGULATING

VALVE

SPEED SENSOR KIT

CONNECTING

CABLES, PLUGS AND CABLE TIES

The TeeJet®844 Sprayer Control basic package for flow based systems could consist of the components shown in this photograph.

They include: (1) Computerized Control

Console

(2) Pressure Regulating

Valve

(3) Connecting cables,

plugs, and cable ties (4) Flow meter (5) Speed Sensor Kit –

Magnetic type (6) TeeJet Agricultural

Spray Products

Catalog (not shown) (7) 844 Mini Manual

(not shown)

NOTE:The 844 Sprayer Control is fully capable of operating and controlling NH

applications. However, hardware components such as flow meters, regulating valves, and cooling towers will vary from the Standard Kit. A complete TeeJet NH

Hardware Kit is available through your TeeJet

dealer.The 844 is also compatible with other NH

systems currently on

the market. Contact your TeeJet dealer for more information.

FLOW METER

COMPUTERIZED

CONTROL CONSOLE

PRESSURE

REGULATING

VALVE

SPEED SENSOR KIT

CONNECTING

CABLES, PLUGS AND CABLE TIES

PRESSURE REGULATOR IN BYPASS MODE

All pressure regulating valves for the 844 will be wired for use in a by-pass system.While plumbed in a by-pass mode, with the

Auto/Man key in the “MAN”

mode, the valve should close when the key is depressed and open when the

key is depressed.

The pressure regulating valve can also be mounted in a throttling situation as an alternative location. Refer to page 5, and Figures 8 and 8A.

NOTE:The diagrams in Figures 7, 7A, 8 and 8A are shown as general guidelines to follow when plumbing 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 that 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, ensure 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 7A and 8).

Mounting Sprayer Components

FIGURE 7

YPASS PLUMBING DIAGRAM

PRESSURE BASED SYSTEM

TANK

JET AGITATOR

DIAPHRAGM

PUMP

TANK SHUT-OFF

STRAINER

PRESSURE

REGULATING

VALVE

AGITATOR

VALVE

PRESSURE RELIEF VALVE

PRESSURE

TRANSDUCER

ELECTRIC

BALL VALVES

BOOM SECTIONS

TANK

JET AGITATOR

DIAPHRAGM

PUMP

TANK SHUT-OFF

STRAINER

PRESSURE

REGULATING

VALVE

AGITATOR

VALVE

PRESSURE RELIEF VALVE

FLOW METER

5-7”

(12-17 CM)

10-12”

(25-35 CM)

ELECTRIC

BALL VALVES

BOOM SECTIONS

FIGURE 7A

YPASS PLUMBING DIAGRAM

FLOW BASED SYSTEM

PRESSURE REGULATOR IN THROTTLING MODE

In large flow situations, the pressure regulating valve, as shown in Figures 8 and 8A, 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 21.When in throttling mode, the valve should open when the key is depressed, and close when the key is depressed.Be sure to check this before plumbing the valve into the system.

FLOW METER

FIGURE 8

HROTTLING PLUMBING DIAGRAM

FLOW BASED SYSTEM

TANK

JET AGITATOR

CENTRIFUGAL

PUMP

TANK SHUT-OFF

STRAINER

BOOM SECTIONS

SOLENOID VALVES

THROTTLING

VALVE

PRESSURE

REGULATING

VALVE

AGITATOR

VALVE

5-7”

(12-17 CM)

10-12”

(25-35 CM)

FIGURE 8A

HROTTLING PLUMBING DIAGRAM

PRESSURE BASED SYSTEM

SOLENOID VALVES

TANK

JET AGITATOR

CENTRIFUGAL

PUMP

TANK SHUT-OFF

STRAINER

BOOM SECTIONS

THROTTLING

VALVE

PRESSURE

TRANSDUCER

PRESSURE

REGULATING

VALVE

AGITATOR

VALVE

FLOW METER

To ensure accurate readings, the flow meter (if used) must be mounted 10˝ to 12˝ (25-35 cm) from other pipe fittings, preferably in a vertical position with the flow going up.It should also be mounted with direction of flow arrow pointing toward the boom control valves. Refer to Figures 7A and 8.

Be sure the flow 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 22 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.Nor mally this is at the boom control valve assembly. Refer to pages 4 and 5, Figures 7 and 8A. Mount the unit vertically on a shor t 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 reducing 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, therefore 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.

Components: Two 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.

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 1.

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 inch (3-10 mm) of the metal object being read.

Installing the Speed Sensor Assembly

SPEED

STEP

FIGURE 1

HEEL MOUNTING

MAGNETIC

SPEED SENSOR

CABLE

MAGNET

RIM

SENSOR

TIRE

FIGURE 2

NOTE: TARGET FACES TIRE LUGS

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 4 and drill two 3/8 inch (10 mm) holes, locating them 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 using the nuts and washers provided.

Installing the Magnetic Sensor

The flat, 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 flat 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 to within 1/8 to 3/8 inch (3-10 mm) of the wheel magnet.Tighten the sensor clamp using the clamp screw per Figure 6A.

Your installation will likely vary from the example. It may be necessary to customize the installation to accommodate your specific 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 inch to 3/8 inch (3-10 mm) from each magnet as they pass the Sensor assembly.

SPEED

STEP

SPEED

STEP

FIGURE 4 FIGURE 5

AGNET LOCATIONS MAGNET ASSEMBLY

TIRE

WHEEL

NUT

MAGNET

WASHER

3/8˝ (10 mm)

HOLE FOR

MAGNET

FIGURE 6A

ENSOR ASSEMBLY

CLAMP

SCREW

SENSOR

BRACKET

FIGURE 6

ENSOR MOUNTING

SENSOR

FLAT

L BRACKET

Confirming Speed Sensor Installation

Magnetic Wheel Sensor:

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 844 dealer.The 844 will automatically sense if the speed sensor is a wheel speed or 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.

SPEED

STEP

MOUNTING THE TEEJET 844 CONSOLE

Location

Determine the best location for the control console in the cab or operator’s compartment. Allow sufficient clearance, approximately 4-5˝ (10-12 cm) to accommodate for the power and operating cables that will be connected to the cable leads and connectors on the right side of the console.

Mounting

Mount the console to a firm suppor t 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.

CONSOLE

STEP

CONSOLE

STEP

BRACKETS PROVIDE ANGLE ADJUSTMENT

Power Connection

Locate the power cable which has a black connector on one end, and two battery terminal rings on the other. Extend the battery terminal r ing end of this cable from the cab to the battery.

Note: Some tractors use two 6 Volt batteries as a power source. Make sure there is a total of 12 Volts delivered to the controller by connecting to the (+) terminal on one battery and the (-) terminal on the other battery.

Reliable operation of the 844 Sprayer Control depends on a clean power supply. Ensure this by connecting the power cables directly to the battery and not to another power source.

Connect the battery terminal r ings to the battery posts, making sure that the positive

(red) and negative (black) wires correspond with the polarity of the

battery terminals. Note: The power cable is designed to provide the simple addition of a remote

master boom switch in a convenient location (i.e. on the throttle, gear shift, or floor switch).To install a remote boom switch, simply install a switch in the loop of brown wire in the power cable.The switch should be rated to handle the total current used by all boom section valves combined. If installed, the remote master switch will operate in series with the boom switches on the console.

Connect the battery cable to the console by joining its connector with the connector on the short power cable lead that extends from the middle of the right side of the console.

Test the installation by depressing the key once to turn the 844 console on. If the display shows information, you have wired the power correctly.

Note:The TeeJet 844 Sprayer Control has an automatic power down feature.With the master boom switch in the “off” position, the 844 will automatically shut down after 10 minutes of no inputs.This prevents possible battery drainage.To turn the console “off” with the Master Switch located in the “off” position, depress and hold the key while depressing the key once, and then releasing both keys.The console display will read “OFF”and will shut down after 5 seconds providing no other keys are depressed.

CONSOLE

STEP

BATTERY

ONE 12-VOLT BATTERY

RED (POS.)

BLACK (NEG.)

CONSOLE BATTERY WIRES

12-VOLT SYSTEM USING TWO 6-VOLT BATTERIES

RED (POS.)

BLACK (NEG.)

CONSOLE BATTERY WIRES

RED (POS.)

BLACK (NEG.)

CONSOLE BATTERY WIRES

24-VOLT SYSTEM USING

TWO 12-VOLT BATTERIES

RED (POS.)

BLACK (NEG.)

CONSOLE BATTERY WIRES

12-VOLT SYSTEM USING TWO 6-VOLT BATTERIES

Connecting Component Cables to Console

Now that you have the console installed you can begin connecting it to the other components of the 844 system.The standard kit contains a valve end cable that attaches to the boom control valves and the pressure regulating valve on one end, and directly to the lower right cable lead of the 844 on the other end.The valve end cable can be identified as the one with a single connection plug on one end and either 5 or 7 single wires and one small two wire connector on the valve end.

A second cable connects the flow meter and/or pressure sensor, and a magnetic wheel speed sensor, proximity speed sensor or radar speed sensor to the 844 console. It attaches to the sensor cable connector located on the top of the right side of the controller.The correct cables will be supplied with the 844 kit you ordered or purchased.

Lay out the cables before installing the sprayer components to be sure the cables are long enough. Each of these cables is 15 feet (4.5 meters) in length from the sensor connections to the 844 console connection. If your installation requires longer cables, an 8 or 15 foot (2.5 or 4.5 meter) extension that installs between the console and the standard end cable is available.

If an exit hole had to be cut in the cab, be sure the edges are deburred and protected to prevent damage to the cables.

CONSOLE

STEP

SENSOR CABLE LEAD

POWER CABLE LEAD

VALVE CABLE LEAD

CONNECTING SYSTEM COMPONENTS TO THE CONTROL CONSOLE

Two cables are provided to connect the sprayer control components to the Control Console:

■ The “Sensor” Cable provides connections to the Flow meter or Pressure Transducer, and Wheel Speed Sensor or Radar Speed Sensor.

■ The “Valve” Cable provides connections for the Pressure Regulating Valve and the Boom Control Valves.

Both have a large plug on one end and lead connectors for individual valves or sensors on the other end.

All cable connectors are unique or specific to each control component. This eliminates the possibility of connecting the wrong cable lead to a component.

FIGURE 9

IRING DIAGRAM

844 SPRAYER CONTROL

TANK

POWER

+ –

JET AGITATOR

SPEED SENSOR

SOLENOID VALVES

BOOM SECTIONS

STRAINER

TANK SHUT-OFF

CENTRIFUGAL

PUMP

AGITATOR

VALVE

PRESSURE

TRANSDUCER

(IF USED)

PRESSURE

REGULATING

VALVE

10-12˝

(25-35 CM)

5-7˝

(12-17 CM)

FLOW METER

(IF USED)

Wiring Layout

Determine the best cable routing to the sprayer control components on the sprayer. This could be along the flow line, main frame of the sprayer, or wherever the cables can be conveniently secured. Avoid any situation where the cables may lay in puddles, or come in contact with extreme heat sources.

Warning: System Components should be mounted at least 3 feet (1 meter)

from areas of excessive vibration (i.e. engines) to avoid high frequency interference.

The end of the component cables with the large connectors can be connected directly to the 844 console cable leads, or to an extension cable that in turn attaches to the 844, as in Figure 10A.

CONNECT

STEP

FIGURE 10 FIGURE 10A

SENSOR

END

CABLE

SENSOR

END

CABLE

SENSOR

EXTENSION

CABLE

SENSOR

CABLE

LEAD

POWER

CABLE

LEAD

VALVE

EXTENSION

CABLE

VALVE CABLE

LEAD

SENSOR

CABLE

LEAD

POWER

CABLE

LEAD

VALVE CABLE

LEAD

WIRING DIAGRAM FOR SOLENOID VALVES

WIRING DIAGRAM FOR BALL VALVES

VALVE

END

CABLE

VALVE

END

CABLE

FIGURE 11

OPTIONAL FLOW METER

OPTIONAL

WHEEL SPEED SENSOR

OPTIONAL

Making the Connections

Now, extend the cable containing the leads to the Flow meter or Pressure Sensor, and Wheel Sensor or Radar Sensor to the furthest component. Select the appropriate lead and connect to this component. Run the cable to the other component, taking care to safely secure the cable along the route. Refer to figure 11 on page 14.

Repeat this procedure with the cable containing the leads to the Pressure Regulating Valve and the Boom Control Valves.Refer to the chart at left when attaching the boom section wires.This cable also includes one or two black wires for ground connections.T-tap connectors must be attached to these wires to connect them to the boom control valves, which should be evenly distributed across the two.

If both the flow meter and pressure transducer are not used simultaneously, there will be one extra connection on the sensor end cable. Simply tie this part of the cable back as it will not be used.

When all connections have been made, connect the large plugs into the appropriate cable leads on the side of the Control Console.

Note: The 844 is designed to handle a maximum of 4 amps per boom section.

Valves requiring DPDT switches are not compatible with the 844.

CONNECT

STEP

You are now ready to begin the programming

of the TeeJet Model 844 Sprayer Control.

1 White 2 1 Green 3 2 Yellow 4 3 Orange 5 Blue

5 Section 3 Section Color

BOOM CONTROL

VALVE WIRE COLORS

. BOOM SECTION #

STEP ASTEP B

STEP C

SOLENOID VALVES

BOOM SECTIONS

1 2 3

BALL VALVE CONNECTOR

TO TERMINAL OF VALVE

Programming Guidelines

IMPORTANT PRELIMINARY INFORMATION

Before you begin, we recommend that you review the following Programming Guidelines that control the programming process:

■ For your convenience, the programming of the 844 has been divided into two programming categories; System Setup Mode and Application Setup Mode.

■ Depressing the key once will flash “ ” in the upper left hand corner of the display window.The word “

USEr” will be displayed in the lower right corner indicating you are about to enter the Application Setup Mode. Depressing the key a second time will put the Control Console into the Application Setup Mode. If you inadvertently press the key once, wait for 3 seconds and the Control Console will return to its normal operating mode.

■ Depressing and holding the and keys while simultaneously pressing the key once will flash “”in the upper left hand corner of the display window.The word “

PrO” will be displayed at the right of the display window indicating you are about to enter the System Setup Mode. Depressing the key a second time will put the Control Console into the System Setup Mode. A delay of three seconds will return the Control Console to its normal operating mode.The System Setup programming steps will likely only need to be programmed once, to customize the controller to your sprayer.

■ For either setup mode, if you depress and hold the key for 3 seconds, your inputs will be stored and the computer will exit the respective setup mode.This action will not be necessary until the last programming step has been completed.

■To increase the value of a programmable digit, depress the key. To decrease the value, depress the key.These keys are located directly to the right of the display. For some programming steps, depressing and holding the or key will change the programmable value rapidly. Pressing the or

key once will change the value by one increment. Depressing the and keys simultaneously in some programming steps will set the value to “0”.

■ For either setup mode, depressing the key will advance you to the next programming step.

To begin the programming process:

■ Read above for programming tips.

■ Be sure the “master” boom toggle switch is “OFF.”

■ Turn console “ON”by depressing the key. When the Control Console is

turned on, the software version will be displayed at the top of the display and the serial number will be displayed in the lower half of the display. This information will be needed when calling for service support.

■ To turn the console “off”, depress and hold the key while depressing the key once, and then releasing both keys.The console display will read

“

OFf”

and will shut down after 5 seconds providing no other keys are depressed.

SYSTEM SETUP MODE

The System Setup Mode contains the programming steps that customize the controller to the sprayer or sprayer components.These include calibration steps and parameters that, once programmed, will likely never change.

To enter the System Setup Mode, press and hold the and keys simultaneously. While holding the and keys in, depress the key twice (within 3 seconds), and release to enter the System Setup Mode.The first programming step should be visible.

Setting Your Program Mode

(U.S., Turf, NH3, Imperial, S.I.)

Default = US The 844 console will display a large “US” in the center of the display. The default

value “

US” indicates that all default values will be shown in U.S.measurements, unless changed to Turf (trF), Anhydrous (nh3), Imperial Gallons (INP), or Metric (SI) units.Turf units displays information in Gallons per 1000 ft2, NH3displays units in Pounds of Nitrogen per Acre;Imperial displays units in Imperial Gallons per Acre; and SI displays all units in metric (l/min, l/ha, km/hr, cm).

If you will be using U.S. measurements no change is necessary, depress the key to advance to the next programming step.

If, however, you will be using one of the other units listed, then depress the or key to select those units you will be using.Depress the key to accept the value and advance to the next program step.

NOTE:Whenever you select a different unit mode, all of the default values for all the program steps are reset.

Flow Meter or Pressure Based

Default = FLO The 844 system can be used with either a flow meter, pressure transduce or

both.This step tells the computer which sensor you will be using on your sprayer to control the flow regulation.

The default value is set for a “

FLO”based system using a flow meter.If this is what you have installed on your sprayer, then depress the key to advance to the next step.

Steps to Successful Programming

Programming the 844 Sprayer Control System

US, trF,

nh3, iNp

PROGRAM

UNITS

flo, prs

SENSOR

TYPE

If, however, you have installed a pressure transducer instead, use the or key to select “

PrS” for a pressure based system.Then, depress the key to

advance to the next step. If both sensors have been installed on the sprayer, this step will determine which

sensor will be used by the 844 to determine pressure/flow regulation. If “

FLO”is selected, the flow meter will be used to control the flow and the pressure transducer will be used only to display the actual pressure.If “

PrS” is selected, the pressure transducer will be used to control the flow and display the actual pressure.The flow meter signals will be ignored.

Flow meter Pulses

Default = 650 During the Flow meter Calibration Step, the symbol (flow meter turbine) will

be flashing at the top of the console display. First, locate the factory calibrated flow meter pulse rate tag on the flow meter. If

this varies from the default value of the console, use the or keys to modify the value.Depressing the and keys simultaneously will clear the value to zero.

In some cases, larger flow meters with small calibration numbers will include decimals for greater accuracy.To add a decimal to the 844 calibration number, press the Auto/Man key.

If you are not using a flow meter but are using a pressure transducer instead and have selected “PrS”in the previous step, this step will not appear.

NOTE:This flow meter number represents the number of pulses per liter of liquid.The 844 console makes all of the necessary conversions if using units other than metric.

Pressure Transducer Maximum Rating (P Hi)

Default = 150 (psi in US, trF and INP Modes) Default =

10.0 (bar in SI Mode)

This step is used to set the maximum rating of the pressure transducer in your system.This number can be found stamped on the pressure transducer itself.If your transducer has a maximum rating of 150 psi (10 bar in SI mode) and that number is shown in the display, then advance to the next step by depressing the

key. If, however, the maximum rating is 300 psi (20 bar in SI mode), use the

and keys to change the value. Depress the key to advance to the

next step.

NOTE: If you are not using a pressure transducer but are using a flow meter instead, skip this step by pressing , leaving the default value programmed.

FLOW METER

CALIBRATION

150

P Hi

Pressure Transducer Low Pressure Calibration (P rEF)

Default = 4.0 This step is used to calibrate the “0” pressure setting of the pressure transducer

installed in your system.The pressure transducer used with the 844 is a current type transducer and uses a 4-20 mA reading. 4.0 mA represents 0 pressure.

This step uses an auto-calibration feature to calibrate the transducer. Make sure that the sprayer pump is off and there is absolutely no pressure in the system. Depress and release the and keys simultaneously to activate the autocalibration feature.You will see the message “

NES” in the lower left of the display

and the lower right of the display count the numbers “

0” through “9”.When the display finishes counting, a number close to 4.0 should be displayed.The low pressure value of the transducer is now calibrated.

Depress the key to advance to the next step.

NOTE: If you have selected a “FLO”based system, skip this step by pressing

and leave this value at the default of 4.0.

Nozzle Spacing

Default = 20 (inches in US, trF, and INP Modes) Default =

50 (cm in SI Mode)

Default =

30 (inches in nh3 Mode)

While in the Nozzle Spacing step, the symbol will be flashing at the top of the console display. Nozzle spacing should be recorded in inches (cm in SI mode).

If the default value is correct, depress the key to accept the value.If the nozzle spacing is different than that shown as a default, then add or reduce this number by using the or keys to record the new value.Depressing the

and keys simultaneously will clear the value to zero.

When the correct value has been entered, depress the key to accept the value and advance to the next step.

When broadcast or broadacre spraying, enter the nozzle spacing in the display. If banding, enter the band width as your spacing. If directed spraying, enter the row spacing divided by the number of nozzles per

row as your spacing.

NOTE: All Application rate readings (US GPA, G/1000 ft2, #N/acre, Imp. GP A, and l/ha) and area readings are expressed in treated acres (hectares).

NOZZLE

SPACING

4.0

P ref

Number of Spray Tips Per Boom Section

Default = 6 (tips per section in US, trF, iNp and SI Modes) Default =

12 (tips per section 1, 0 for the others in nh3 Mode)

While in the Tips Per Boom Section step, the symbol will be flashing at the top of the console display. The console will also display “

SEC 1” at the left and a

number (6) at the right of the display. The “

SEC 1” refers to boom section #1 on your sprayer.The number at the right is to be adjusted to match the number of tips you have on boom section 1.

The default value of “6”will appear for all booms sections.The next 3 or 5 programming steps are Number of Spray Tips Per Boom Section steps.These steps correspond with the 3 or 5 boom switches on the lower portion of the console, depending on the 844 console you purchased.The section you are programming can be identified by looking at the

SEC # at the left of the display.

You must program the correct number of spray tips for each boom section on your sprayer.Use the or keys to produce the correct value.Depressing the and keys simultaneously will clear the value to zero.

Advance to the next step by depressing the key. This must be done for all Number of Spray Tips Per Boom Section steps .

Any individual boom switches not being used must be programmed to a “0” value.When you have programmed and validated the last Number of Spray Tips Per Boom Section step, advance to the next program step by depressing the

key .

User Programmable Tip

Default = 0.00 While in the User Programmable Tip step, the symbol will be flashing above

the

P tab at the bottom of the display.

In some cases you may find that nozzles other than those pre-programmed for the 844 Sprayer Control will need to be used. If one of the eleven pre-programmed tips do not meet your needs, this programming step allows the user to program a tip.

Use the or key to adjust flow rate in US Gallons Per Minute (Liters Per Minute) {Imperial Gallons Per Minute} at 40 psi (2 bar).Depressing the and

keys simultaneously will clear the value to zero.To accept the value,

depress the key to advance to the next programming step. The flow rate information for the tip is only used to calculate the pressure reading

for flow based controls.With non-linear tips, the calculation would be incorrect. Therefore we recommend a “

0.00” setting for non linear tips so that the pressure

will read “

0” at all times, instead of an inaccurate pressure.Non linear tips should not be used with pressure based controls. Pressure based controls use the tip flow rate information to adjust the pressure to achieve the right application rate based on the size of the tips.With non linear tips, there is no way for the controller to accurately calculate what the pressure should be at various speeds.

USER

PROGRAM

TIP

TIPS PER

BOOM

SECTION

Warning: If the user is using tips other than the TeeJet®‚ VisiFlo®‚ brand, the corresponding colors may not match. In this case , the user should determine the flow rate of the tip being used at 40 psi (2 bar), and enter this flow rate as the programmable tip.

NOTE:The flow rate will automatically be displayed at 40 psi (2 bar). This pressure must be used for determining your tip’s flow rate. Actual operation pressure is not important.

When the correct nozzle flow rate has been entered, advance to the next programming step by depressing the key.

Pressure Regulating Mode

Default = byp (By-pass for US, trF, INP, and SI Modes) Default =

thr (Throttling for nh3 Mode)

While in the Pressure Regulating Mode step, the symbol will be flashing at the top of the console display.

This step tells the 844 where the regulating valve has been plumbed.Once set correctly, this value should not change unless the regulating valve is physically moved to a new point in the plumbing.For more information on plumbing refer to page 4 and 5 of this manual.

The default value “

bYP” indicates that the pressure regulating valve is plumbed in the bypass line.In most situations, especially total flows below 4 US GPM (15 l/min) {3.3 Imperial GPM}, this is the preferred installation position. If the default is correct, depress the key to accept the value and advance to the next step.

NOTE:When programmed in the bypass mode, with the controller in “MAN”mode, the pressure regulating valve should close when the key is depressed, and open when the key is depressed.

In large flow situations, the pressure regulating valve can be located in the supply line between the flow meter and the boom control valves. If you will be locating the pressure regulating valve in this position, use the or keys to change the value to

tHr (Throttling Mode). By doing this, you have reversed the polarity

that the console uses to control the regulating valve.

NOTE:When programmed in the throttling mode with the controller in “MAN”mode, the valve should open when the key is depressed and close when the is depressed.

Depress the key to advance to the next step.

PRESSURE

REGULATION

MODE

Regulation Adjustment Speed

Default = 9.5 (bYP Mode) While in this step, the symbol will be flashing at the top of the console display. This step allows you to regulate the speed of the pressure regulating valve to

accommodate different application needs. Operating conditions may necessitate a higher or lower response speed for the

regulating valve.To change the response time number, simply use the and

keys to increase or decrease the number. Any number between 0.0 and 9.9 can be selected.The first digit sets the speed for coarse adjustments in relation to a large percentage outside of the target application rate.The second digit sets the speed for the fine tune adjustment in relation to a small percentage close to the target application rate.

9.5

(Coarse).(Fine)

If your system is plumbed in a by-pass mode, the valve speed number of 9.5 works very well in most applications.

If your system is plumbed in a throttling mode, start with a valve speed number of 3.0 and adjust the number according to your application requirements.Low flow situations will require a slower response time.Adjusting agitation volumes to accommodate the regulating valve to work in a more fully open position allows for a faster response time, with little to no searching.

To accept this value and advance to the next step, depress the key.

NOTE:This speed value can be adjusted to optimize system performance. If you notice that the valve seems to “search”for the programmed application rate by cycling the pressure up and down continuously, reduce the number until the “searching”is minimized or eliminated. Conversely, a higher number will increase the valve response speed and speed up the rate of adjustment.

Boom Control Valve Type

Default = 2 Way While in the Boom Control Valve Type step, the symbol will be flashing at

the top of the display. The programmable information (2 Way or 3 Way) will be displayed at the left in the console display.

This programming step is used to distinguish the type of on-off boom control valves you have on your system.There are two types of valves that can be used, 2-way control valves or 3-way control valves.

A 2-way control valve is simply an on/off valve. Flow is either directed to the boom section(s) or it is blocked or diverted away from the booms.A 3-way control valve is know as a by-pass valve. Flow continuously passes through this valve.When the valve is activated (on), flow is directed to the boom section(s).When the valve is not activated (off), flow is directed through a bypass port, back to the supply tank.

If you are using the 3-way type of boom control valves in your system, change the value using the or keys. Depress the key to accept the value and advance to the next programming step.

If the default value is correct, depress the key to accept the value and advance to the next programming step.

Note: If using 3-way, bypass boom control valves, refer to the instruction manual of the valve you are using for proper calibration instructions.

Way

CONTROL

VALVE

TYPE

REGULATION

ADJUSTMENT

SPEED

Speed Sensor Type

Default = 250

Note: During Speed Calibration, the 844 will automatically sense whether a Wheel Speed or Radar Speed Sensor is being used.

While in the Speed Calibration Programming Step, the symbol will be flashing at the top of the display. The programmable value (250) will be displayed in the lower right corner of the display.

PROXIMITY/MAGNETIC PULSES

The speed sensor needs to be calibrated in order to provide the proper speed and area readings.The value for this step is the number of pulses generated by the speed sensor in 300 feet (100 meters).This value can be determined by automatic calibration while driving exactly 300 feet (100 meters), or by entering the number manually.

Automatic Calibration:

To automatically calibrate the speed sensor, mark off a distance of exactly 300 feet (100 meters).While still in the speed calibration program step, position your sprayer at the beginning of your 300 foot (100 meter) course and press the and keys simultaneously to clear the contents of the display and to activate the auto calibration mode.When the auto calibration mode has been activated,

CAL

will be displayed at the lower right of the display.Next, press the key once to begin the calibration process.Now drive the course and the 844 will count the pulses as the sprayer moves.The speed at which you drive over the course is not important. Stop the sprayer at exactly 300 feet (100 meters) and press the

key to validate the number in the display. The speed sensor is now

properly calibrated.

Note: Once the auto calibration mode has been activated, no other functions of the 844 are possible until the console receives speed impulses for calibration.To deactivate the auto calibration mode, depress the key twice.

During the automatic calibration step, the 844 automatically senses whether a magnetic sensor or radar ground speed sensor is installed.If you prefer to enter the speed value manually, refer to the following instructions.

Manual Calculation:

To manually calculate the proper value for Wheel Speed Sensor pulses, you need to know the circumference of the wheel to which the sensor is mounted.It can be measured by marking the tire and measuring the distance covered as that mark makes one full revolution.Then use the following formula:

3600 x {# magnets on wheel (usually 2)}

i.e.

3600 x 2

= 240

___________________________________ ________

Wheel Circumference in inches 30

10,000 x {# magnets on wheel (usually 2)}

i.e.

10,000 x 2

= 250

___________________________________ ________

Wheel Circumference in cm 80

The result can be entered as an alternative to using the automatic calibration method. Use the or keys to adjust the value. Press the key to validate the value and advance to the next programming step.

CALIBRATE

SPEED

RADAR SPEED PULSES

Automatic Calibration:

The automatic calibration of a Radar speed sensor is similar to the automatic calibration of a wheel speed sensor.Refer to the directions above.When the console has determined that a Radar Speed Sensor is being used,

rAd will be

displayed in the lower left of the console display.

Manual Calculation:

To manually enter the radar calibration value, first press the Auto/Man key to put the control console into radar mode.When the Control Console is in the manual radar calibration mode,

rAd will be displayed in the lower left of the console display. Now use the or keys to adjust the value.When the correct value has been entered, press the key to validate this value.

Distance Counter

Default = 0 This step is a feature, not a calibration step. No specific value needs to be

entered here for the controller to operate correctly. This feature will measure distance in feet (meters).This can be used to measure

fields, fence lines or to confirm Automatic Speed Calibration.To activate the counter the Master Boom Switch must be on.To avoid actually spraying during this task, toggle the individual boom sections off.

Anytime that the Master Boom is on during this step the console will measure distance. If the Master switch is toggled off, the console will stop counting distance.

To clear an existing distance, press and keys simultaneously.

NOTE:To confirm Automatic Speed Calibration, first complete the calibration procedure. Advance to Distance Counter step. Drive across the same 300 feet (100 meters) course turning the Master Switch ON at the start point and OFF at the finish point. Distance measured should be 300 feet (100 meters) +/- 6 feet (2 meters).

Simulated Ground Speed

Default = 6.0 While in the Simulated Ground Speed step, the symbol will be flashing at

the top of the display. The default value of 6.0 will be displayed in the middle of the display.

The simulated ground speed allows you to check out the functions and operations of the console and of the sprayer, spraying water, without actually moving the sprayer.This can and should be done prior to any spraying activity.

NOTE: If you are using a Radar Speed Sensor, disconnect the Radar connection from the main console. Because of the sensitivity of this unit, any movement can disable simulated speed.

To set the simulated speed, use the and keys to adjust the value. When the value is set, depress the key to advance to the next step.

NOTE: Once the sprayer begins moving and the 844 receives actual speed pulses, the simulated speed feature is deactivated.

ft O

DISTANCE

COUNTER

6.0

SIMULATED

GROUND

SPEED

Liquid Specific Gravity (Density)

Default = 1.00

While in the Liquid Specific Gravity (Density) Programming Step, the D

symbol, will be flashing at the top of the console display. The default value of “1.00” corresponds with the specific gravity of water and is

correct for most pesticide applications.Occasionally some spray solutions, such as fertilizer, have different densities.If you are using such a material, a new value should replace the default value.The chart to the left can help you determine the specific gravity of other solutions.

To change the default value to your new value, use the or keys to change the value in the display. Depressing the and keys simultaneously will clear the value to zero.To accept the value and advance to the next programming step, depress the key.

If the solution that you are using can not be found on the chart at the left, the Specific Gravity can be calculated as follows:

Weight of Solution

Specific Gravity = ———————————

Weight of Water

NOTE:To activate this specific gravity number, while in the Application Setup Mode, depress the Auto/Man key so the “D”is displayed at the top of the screen.When the “D”is displayed, all calculations performed will use the specific gravity programmed in this step.To remove the “D”depress the Auto/Man key. When the “D”is not displayed all calculations performed will use the specific gravity of water (1.00) regardless of whether another density is programmed into this step or not.

Communications

Default = no cON (no communications) If your 844 has been upgraded to be communications compatible, this step lets

you select what type of communication you will be using.The choices available are the default of “

no cON” (no communications), “prt”(Printing Capability), “gps”

(Global Positioning Communication Capability), or “

lOg” (Downloading to a PC on

the go capability). If your 844 has not been upgraded with the communication package, no change

is necessary from the default. If, however, your 844 has been upgraded with the communications package, use the and keys to select the type of communication you will be using.After selecting the communication you will be using, depress the key to advance to the next step.

NOTE: If a communications feature is selected, you must exit the setup mode, power down the console ( + ) then restart the console ( ). This activates the selected communication feature.

WARNING:The 844 must be powered on before connecting to a communication device (i.e. printer, computer, GPS).The 844 will not completely power on if it is first connected to a communication device.

no cON

COMMUNI-

CATIONS

PROGRAM

SPECIFIC GRAVITY

7.0 lbs. .84

8.0 lbs. .96

8.34 lbs.–Water 1.00

10.0 lbs. 1.20

10.65 lbs.–28%N 1.28

10.85 lbs.–30%N 1.30

11.0 lbs. 1.32

12.0 lbs. 1.44

14.0 lbs. 1.68

Weight of

Solution Per Gallon

Specific

Gravity

Note:Water weighs 8.34

lb/gal or 1 Kg/L

Minimum Regulating Pressure Setting

Default = 10 PSI (0.7 bar) This programming step allows you to set the minimum pressure that the sprayer

control will regulate to.Sometimes when the sprayer speed slows down, the control system will regulate the pressure so low that it falls below the manufacturer’s recommended pressure for the spray tip or reduces system flow to the point where the flow meter will stall.

To avoid these situations, the TeeJet 844 can be programmed to not regulate below the pressure set in this step.If this step is set for the default of 10 PSI (0.7 bar), the pressure will not go

below 10 PSI (0.7 bar) while spraying in

automatic mode.

NOTE: Not all 844 models contain this programming step. If this step is not displayed, the 844 has an automatic low pressure setting of 10 PSI (i.e. the system will not regulate below 10 PSI (0.7 bar).

When you have completed the Minimum Regulating Pressure Setting Step, you have completed the System Setup Mode of the TeeJet 844 Sprayer Control.

NOW, DEPRESS AND HOLD THE KEY FOR THREE SECONDS, AND THE ENTIRE PROGRAM SYSTEM WILL BE STORED IN THE COMPUTER’S MEMORY.

NOTE: For your protection, the 844 console will not automatically power down while in the System Setup Mode.You must exit properly as described above to enable the console auto power down feature.

NOTE: Cutting the power to the controller while in the System Setup Mode will not save any changes into the computer’s memor y.

10 PSI

0.7 bar

MINIMUM

PRESSURE

APPLICATION SETUP MODE

The Application Setup Mode contains the programming steps that are most frequently changed (target application rate, and nozzles used).Spraying Systems Co.has added this separate setup mode to speed the programming process when minor changes are made in the spraying operation (i.e. changing fields, switching nozzles, changing crops, etc.).The operator can avoid toggling through all of the programming steps unnecessarily.

To enter the Application Setup Mode, depress the key twice.Depressing the key once inadvertently will cause the display to flash “”in the upper left and

“

USEr” at the lower right of the display for three seconds before the 844 will return

to normal operating mode.The “ ”/ “

USEr” indicates that the console is about to enter the Application Setup Mode. Depressing the key a second time puts the Control Console into the Application Setup Mode.

Target Application Rate

US Default = 20.0 US GPA Trf Default = 2.00 Gal/1000 ft

iNp Default = 20.0 Imperial GPA nh3 Default = 200 Pounds of Nitrogen/Acre si Default = 200 l/ha

While in the Target Application Rate step, the application rate, pressure, speed, and flow rate in US GPM (l/min) {Imperial GPM}, will be displayed.The application rate units (GPA, G/1000 ft

or l/ha) will be flashing indicating that the

corresponding value can be adjusted or programmed. Your target application rate should be entered in this step.Depress the or

keys to adjust the value. Depressing the and keys simultaneously will clear the value to zero.When the desired application rate has been entered, depress the key to accept the value and advance to the next step.

NOTE: If you are using NH3units, only the Target Application Rate will appear in this step.

Nozzle Selection

Default = Red or 0.4 US GPM (1.29 l/min) {0.33 Imperial GPM} While in the nozzle selection step, the display will remain the same as in the

Target Application Rate step except the symbol will be flashing at the bottom of the display just above a color coded strip.

NOTE:The tabbed color strip along the bottom of the display represents color coding for TeeJet

VisiFlo®spray tips. If you are using tips made by another manufacturer, you should use the programmable tip capacity as explained in the System Setup section on page 20.

NOZZLE

SELECTION

TARGET

RATE

Programming the 844 Sprayer Control System

Select the representative color to match the spray tips being used to apply the desired application rate.Use the or keys to toggle the symbol through the tabbed color strip at the bottom of the display panel.The corresponding flow rate for each color will be displayed in US Gallons Per Minute (Liters Per Minute) {Imperial Gallons Per Minute} at 40 psi (2 bar) at the lower right of the display. If the programmable tip is to be used, toggle the symbol to the “

” tab.Flow rate will always be displayed in US Gallons Per Minute (Liters Per Minute) {Imperial Gallons Per Minute} at 40 psi (2 bar) regardless of any changes to other display parameters.

The table at the bottom indicates flow rates in US Gallons Per Minute (Liters per Minute) {Imperial Gallons Per Minute} at 40 psi (2 bar) for the TeeJet

VisiFlo

color coded spray tips represented in the 844 Spray Control.

Warning:Color coding of spray tips is not uniform from manufacturer to manufacturer. Flow rates for all nozzles should be checked prior to use.Tips that are worn should be replaced to ensure an accurate application rate.

Feature:

Based on the tip programmed and nozzle spacing (programmed in the System Setup Mode), the 844 console will calculate the required speed to achieve the application rate that was entered in the last programming step.The speed will be displayed in the lower left corner of the display window. Keep in mind that this speed is based on a spraying pressure of 40 psi (2 bar).More calculations can be performed in the next programming step.

When the correct flow rate for the spray tips being used has been entered, depress the key to accept the value and advance to the next step.

Calculation/What If? Step

This Programming Step is a diagnostic tool only and has no effect on the operation of the TeeJet 844 Sprayer Control. It allows the user to adjust the indicated pressure to see what effects it would have on the operating speed; or the user can adjust the speed to see what pressure would need to be used to maintain the target application rate.This step should help determine if the correct nozzle size was chosen for the application.

While in the calculation step, either the pressure “PSI” (bar) or speed “MPH” (Km/H) units will be flashing.

Adjust Speed:

While in the Calculation Step, the user is able to view the nozzle flow rate, pressure, speed and application rate simultaneously. When first entering this step, the speed “MPH” (Km/H) units will be flashing, indicating that this digit can be changed. By depressing the or keys, the programmer can change the indicated speed to a desirable speed or typical operating speed.

PSI vs.

SPEED

CALCULATION

STEP

Orange 0.10 0.32 0.08

Green 0.15 0.48 0.12 Yellow 0.20 0.64 0.17

Blue 0.30 0.97 0.25

Red 0.40 1.29 0.33

Brown 0.50 1.61 0.42

Gray 0.60 1.93 0.50

White 0.80 2.58 0.67

Lt. Blue 1.00 3.22 0.83

Lt. Green 1.50 4.83 1.25

Black 2.00 6.45 1.67

TeeJet

VisiFlo

Tip Color

Flow Rate

in US GPM

@ 40 psi

Flow Rate

in l/min

@ 2 bar

Flow Rate in

Imperial GPM

@ 40 psi

The 844 will immediately calculate what the pressure would need to be to maintain the target application rate at this speed. If the pressure is too high, you will need larger spray tips or will have to slow down.If the pressure is too low, you will need smaller spray tips or will have to speed up.

Adjust Pressure:

If you wish to adjust the pressure, press the key once so that the pressure “PSI” (Bar) units begin to flash. Use the or keys to adjust the indicated pressure to a desired or recommended pressure.

The 844 will immediately determine what the operating speed would need to be to achieve the target application rate at this pressure. If the speed indicated is too high, a smaller nozzle is needed. If the speed indicated is too low, a larger nozzle is needed.

Liquid Density:

All calculations performed in the normal Calculation Step are based on spraying water.To convert these calculations to the Liquid Density programmed in the Liquid Specific Gravity (Density) Step in the System Setup Mode (page 24), depress the Auto/Man key.When calculations are using the programmed Specific Gravity (Density), the

D symbol will be displayed at the top of the

display window.To go back to the calculations based on spraying water, depress the Auto/Man key.

NOTE: If you are going to be spraying with a different density of liquid other than water and you have programmed that specific gravity (density) into the Specific Gravity (Density) Step in the System Setup Mode, you must select the

D symbol at the top of the display in order for all of the

calculations to be performed in the regular spraying mode. If when in the regular spraying mode, you do not see the

D symbol at the top of the

display, this means that you have not selected a different specific gravity of liquid and that all calculations will be performed with water (1.00).To spray with a different density liquid, the specific gravity must first be programmed into the System Setup Mode in the Specific Gravity (density) step on page 24. Once a number has been programmed into that step, you must select the

D symbol in the Application Setup Mode by

depressing the Auto/Man key. Note:The tip flow rate, in the lower right corner of the display, will always

display the flow rate in US Gallons Per Minute (Liters Per Minute) {Imperial Gallons Per Minute} at 40 psi (2 bar), regardless of changes to the indicated pressure.

After performing the calculations, you can advance to the beginning of the Application Setup sequence to make any changes by depressing the key once. If no changes are necessary, you have completed the Application Setup Mode of the TeeJet 844 Sprayer Control.

NOW, PRESS AND HOLD THE KEY FOR THREE SECONDS, AND THE ENTIRE APPLICATION SETUP MODE WILL BE STORED IN THE COMPUTER’S MEMORY.

Note: For your protection, the 844 console will not automatically power down while in the Application Setup Mode.You must exit properly as described above to enable the console auto power down feature.

Note: Cutting the power to the controller while in the Application Setup Mode will not save any changes made into the computer’s memor y.

SPRAYER CHECKOUT

Before spraying check all connections related to the Sprayer Control assembly. Particular attention should be given to the speed sensor to be sure the sensor and magnets are inline, and properly secured.

Partially fill the sprayer tank with water to flush the system and to make a visual check of the spray tips to be sure all tips are delivering a good spray pattern.

Follow these steps, in sequence, being sure the Master Boom Switch is in its “off” position:

■ Be sure the tank shut-off valve is open.

■ Star t the engine, engage pump, and set the rpm to that which will be used

when spraying.

■ Switch the computer on by depressing the key on the display panel.

■ Ensure that the spray tips being used match those preprogrammed.

■Turn “on” the toggle switches for each of the spray booms on your sprayer.

■ Depress the Auto/Manual key so that the red LED light indicates

“MAN” mode.

■ Now, toggle the Master boom switch to “on.”

■ Adjust the pressure with the and/or keys.

At this point, the sprayer will be activated and spray tip performance can be visually checked.The pressure adjust keys can be used to raise or lower your spraying pressure.To stop spraying, toggle the Master boom switch to “off”.

The above steps provide a quick way to check-out your sprayer and computerized control system.

However, it is recommended that you calibrate your sprayer to prepare the unit for operation, and to diagnose spray tip wear.Worn tips can contribute to costly chemical waste, and inaccurate spraying regardless of your use of a sprayer control. Calibration is impor tant and necessar y to obtain the benefits associated with a computerized sprayer control.

The TeeJet Spray Products Catalog, supplied with the 844 Sprayer Control kit, gives complete information on sprayer calibration, along with other useful data and spraying information.

Operating Instructions

Very important:Whenever you are working around a sprayer or farm chemicals, be sure to wear protective clothing and eyewear.

THE SPRAYING OPERATION

You have filled the sprayer tank and have thoroughly mixed the chemical(s).Your application rate has been determined as well as the spray tip you will be using, with the sprayer data programmed into the computer.

■ Switch the computer on by depressing the key on the display panel.

■Toggle the boom switches to their “on” position, for each of the booms on

your sprayer.

■Take note of the “n umbered”booms on each side of the sprayer, so that the appropriate boom can be toggled “off” as necessar y.

■The Auto/Manual key should be switched to “AUTO.”

■ In the Auto mode, when the master boom switch is “off”, the target application

rate as well as the symbol will be displayed in the console display. When the master boom switch is “on”, the actual rate will be displayed and the symbol will no longer appear.

■ On flow based models, the lower right corner of the display will alternate displays of the application area (“Ac”for acres or “Ha”for Hectares) and the total volume applied.The display will alternate approximately every three seconds.

■While spraying with the master boom switch “on”, the display window will always display the actual application rate, vehicle speed, pressure and application area covered/total volume applied simultaneously.

As you enter the field to the point where you will begin spraying, turn the MASTER boom switch to “on” position.This will activate the spraying operation. Maintain your usual vehicle speed for spraying.Moderate changes in vehicle speed will not affect your application rate, because such changes are compensated by automatic pressure increases or decreases.

If for any reason you need to stop, turn the MASTER boom switch to “off.” Alarm warnings can occur momentarily while the pressure regulating valve is

searching for a new setting after the closing of a boom section or other change in normal operation. However, if the alarm stays on for a longer time, the valve may have reached its limit and your system will be unable to regulate flow beyond the limit.

BOOST MODE

There may be instances where ”on the go”increased or decreased chemical application may be required in certain areas of your field. In situations like this, the and keys will allow you to easily make the necessary adjustments. The boost mode can be activated while spraying in the Auto mode by depressing either the or key once.With each subsequent depression of the key, the application rate will be increased by 10%.Each subsequent depression of the key will reduce the application rate by 10%.

If the or key is depressed once inadvertently during operation, a delay of 3 seconds will deactivate the boost mode.Succeeding presses will change the target rate as explained above.

Example: If increasing the application rate by 10%, depress the key once to activate the boost mode, and a second time to make the 10% increase.

decreasing the application rate by 10%, repeat the above procedure using

the key. The application rate changes are monitored in the display, as you make them.

The display will show

UP 10, UP 20, dn 20, dn 30, etc.This will be displayed for approximately 3 seconds before the display returns to reading actual application rates.When making the application rate changes, it is not necessary to set the Auto/Man to “MAN” mode.

To return the application rate to its programmed status, you may use the or

keys individually to step back to the application rate in 10% increments, or

depress them simultaneously to return to the programmed target application rate.

NOTE:While in the boost mode , the symbol will flash at the top of the console display, to remind the operator they are not spraying at the target application rate.

AREA/VOLUME FEATURE

The 844 Sprayer Control will count application acres (hectares) and measure total volume applied while the master boom switch is in the “on” position.The area counter will measure treated acres (hectares) and is dependent on the value programmed for nozzle spacing on page 19.The volume measure is dependent on flow meter pulses and is available on flow based models only.

The lower right of the display window will alternately show the treated area sprayed and the total volume applied since the last clearing of the area counter/volume measure.

To clear the area counter/volume measure, depress and hold the and keys simultaneously for three seconds.

NOTE:The area memory counter/volume measure only works when the Master Boom Switch is turned “ON”.

NOTE: If you are using a pressure based controller, the Volume feature is disabled.The total area will then be displayed at all times.

Features

FLOW RATE FEATURE

The 844 Sprayer Control will measure a flow rate moving through the flow meter in GPM (LPM) {Imp GPM}.This feature is activated by pressing and holding the

key while spraying in the normal operating mode.The flow rate display

replaces the area/volume display in the lower right portion of the display. Any time the key is pressed while spraying in the normal operating mode the

flow rate will be displayed. Releasing the key will cause the display to return to area/volume.

This feature can be used for tip calibration or for calibrating the flow meter. Refer to page 38 of this manual for flow meter calibration procedures.

NOTE: Not all 844 models contain this feature . If the display makes no change when pressing on the key while spraying in the normal operating mode, then this feature is not available with this console.

APPLICATION ALARM

If the 844 senses a continuous discrepancy of 10% or more between the Target Application Rate and the Actual Application Rate, the application rate units (GPA, G/1000 ft

or l/ha) will flash in the display window.This alarms the operator to a

problem with the sprayer plumbing, operation or programming.

NO FLOW ALARM

If the 844 stops receiving pulses from the flow meter, the symbol will flash at the top of the display. This alarm indicates that the flow meter has stalled and alerts the operator that there is a problem with the flow meter or elsewhere in the system.

This alarm will occur only when the Master Boom Switch and at least one boom toggle switch is “on”.

Features

PRINTING

Optional printers are available for printing a spraying report directly from the 844. This printing feature is only available on 844 consoles that have been upgraded with the communications package.The optional printers and 844 communications package are available through your TeeJet supplier.

The printout that you get from the 844 contains memory information that the 844 collects. A sample of this printout is below.

To set the 844 for printing, advance to the last step of the System Setup mode and select “Prt” for the communications mode.This must only be done once.

Next, connect the printer to the 844 and make sure that the LED’s to the printer are lit indicating that the printer has power.Simultaneously, depress and hold the

and keys for three seconds or until the printer begins printing. When the printer is finished, the area and volume counters in the lower right of the display will be reset to zero.

Disconnect the printer and continue spraying activity if necessary.

Warning: Each time you print, the area and volume counters are reset to zero. If you do not have the printer connected and have programmed the 844 for printing capability and you are resetting the area and volume counters, the 844 console will be locked for a short period of time.The 844 is trying to print and is dumping the memory information to the printer port.When the 844 has finished dumping the information, the display will return to normal.

NOTE: Printing is only available to 844 consoles that have been upgraded with the communications package.

CONDITION POSSIBLE CAUSES SOLUTION

1 Application Rate Units (GPA, G/1000 ft

A Continuous discrepancy of 10% or more Check all components and programming

or l/Ha) continually flash on/off. between Target Application Rate and steps related to flow

Actual Application Rate.

PROGRAMMING B Flow meter pulses In the System Setup mode, move to the flow meter

Pulses section on page 18 of the 844 Installation Manual. Enter the factory calibrated flow meter pulse rate located on the tag accompanying the flow meter.

C Nozzle Selection In the Application Setup mode, move to the Nozzle

Selection section on page 26 of the 844 Installation Manual. Enter the correct color or the flow rate in US GPM (l/min) {Imp. GPM} of the tips you are using at 40 psi (2 bar). For new tips, this can be found in your TeeJet®Catalog.

If the tips have been used and possibly worn, measure the flow in US Gallons Per Minute (Liters Per Minute) {Imperial Gallons Per Minute) at 40 psi (2 bar) and enter the value in the User Programmable tip programming step which can be found in the System Setup Mode on page 20 of the 844 Installation Manual.

D Number of spray tips per boom section. In the System Setup mode, move to the Tips Per

Boom Section step on page 19 of the 844 Installation Manual. You must enter the correct number of spray tips for each boom section on your sprayer. Three or five boom sections are possible. If you do not use all boom section switches, make sure those not used are set to “0”.

2 Application Rate Units continually A Continuous discrepancy of 10% or more Check all components and programming steps

flash on/off. between Target Application Rate and related to flow.

Actual Application Rate.

MECHANICAL B Stalled flow meter. Make sure there is no pressure in the system.

Remove the flow meter from the discharge line. Inspect the inside of the meter for obstructions. The turbine should move freely. If it does not rotate easily, try flushing it out with clean water. If it remains stuck, remove the turbine by releasing the retaining clip. Clean the turbine carefully and make sure it rotates. Replace the turbine into the flow meter body and secure with the retaining clip.

If you have a rapid check flow meter, remove the turbine from the flow meter body by unthreading it at the sensor. Check the turbine for obstructions. Flush with clean water or disassemble if necessary.

C Plugged Tips In the event of plugged nozzles, remove from

boom and clean with water and a TeeJet brush. Take care not to damage the orifice.

D Wrong capacity tips All tips on the boom should be of the same style,

spray angle and capacity (Flow Rate). Replace any tips not matching those initially selected.

Troubleshooting Guide

CONDITION POSSIBLE CAUSES SOLUTION

E Flow meter plumbed incorrectly A flow directional arrow is located on the body of

the flow meter. Plumb the flow meter with the arrow in the direction of the flow.

The flow meter must be mounted 10˝ to 12˝ (25-35 cm) from other pipe fittings. See 844 Installation Manual page 6.

Generally, the flow meter works better when mounted in a vertical position with the flow being directed up.

F Pump Capacity too low Check the pump to make sure it is working

correctly. Check the plumbing system for any obstructions. Reduce Agitation Volume.

3 Flow meter turbine symbol A Stalled Flow meter Make sure there is no pressure in the system.

continually flashes on/off.

Check to ensure that the sprayer pump has been engaged while trying to spray.

Check cabling for any loose connections.

4 Rate Oscillation A Extreme low regulated flow Due to very low application rates (GPA,

G/1000 ft2)

, l/Ha) the regulating valve in throttling mode is operating in an almost closed position.

Adjust the Reg. Valve Speed Number in the System Setup Mode (page 21) to a slower value.

Plumb the regulating valve in bypass mode. This should allow the regulating valve to operate more in the center of its rotation. If you change from throttling mode to bypass mode, you must reprogram the Pressure Regulating Mode in the System Setup mode. Refer to page 20 of the 844 Installation Manual.

5 Sprayer stops spraying while in Auto Mode. A Pressure Regulating Mode is Check the Pressure Regulating Mode in the

programmed incorrectly. System Setup mode of the 844. Refer to page 20

of the 844 Installation manual to insure that the controller has been correctly programmed for the regulating valve position on your sprayer.

B Flow meter stalled A flashing symbol will also indicate if the flow

meter has stalled. Inspect flow meter for obstructions. If flow meter turbine is impaired, clean and replace.

Sometimes when the regulating valve closes too far, maybe even complete shut-off (with ball type regulating valves), this can cause the flow meter to stall and no flow or pressure regulation will occur. Depress the Auto/Manual key so that the LED indicates “MAN” mode, depress the key for approximately three seconds. You should see the tips begin to spray. Depress the Auto/Manual key so that the LED indicates “Auto” mode, and continue to spray.

CONDITION POSSIBLE CAUSES SOLUTION

6 Actual total volume applied in GPA, A Speed sensor not calibrated correctly. Recalibrate the magnetic or radar speed pulses in

G/1000 ft2, or l/Ha does not match the the Calibrate Speed section of the System Setup total area covered. Mode on page 22-23 of the 844 Installation

Manual.

B Incorrect nozzle spacing Check the Nozzle Spacing section in the System

Setup Mode on page 19 of the 844 Installation Manual to ensure the correct nozzle spacing has been entered. This number should reflect the distance between nozzles in inches (cm) on the boom.

If banding, enter the band width as your spacing. If directed spraying enter the row spacing divided

by the number of nozzles per row.

C Incorrect capacity nozzles The Nozzle Selection section in the Application

Setup Mode on page 26 of the 844 Installation Manual does not match closely enough to the tips on the boom. Compare the value in this section with the flow rate of the nozzles being used at 40 psi (2 bar).

D Flow meter pulses incorrect In the System Setup mode, move to the Flow

meter Pulses section on page 18 of the 844 Installation manual. Enter the factory calibrated flow meter pulse rate located on the tag accompanying the flow meter.

E Wheel speed magnets installed incorrectly One or more of the wheel sensor magnets are not

consistently sending a pulse to the monitor. The distance between the sensor and the magnets

is incorrect. Ground debris can accidentally move the sensor out of position. The red LED on the back side of the sensor should be lit when placed within the correct distance form the magnets.

F Radar installed incorrectly Precise installation of the Radar is critical to it

working correctly. Thoroughly review the manual provided with the Radar sensor you are using.

6 No regulation in Auto Mode A No speed sensing Check speed sensor to ensure it is sending pulses

to the controller. Check the Calibrate Speed section in the System Setup Mode on pages 22-23 of the 844 Installation Manual to ensure speed sensors are correctly calibrated.

B Regulating valve malfunction Check wiring from controller to the regulating

valve. Make sure there is voltage to the regulating valve.

Both wires leading to the regulating valve are 12V(+). With the Master Switch on, when either the or key is pushed, the appropriate wire goes to ground (–) to complete the circuit.

Flow Meter Calibration

The flow meter supplied with your system has been calibrated at the factory and under normal circumstances there may be no need to re-calibrate it. However, the factory calibration setup may not reflect specific sprayer plumbing. Before spraying actual chemicals, the flow meter should be checked for proper calibration. Also, the flow meter is made up of moving parts and can wear over time. If you feel that your flow meter is worn, you can re-calibrate your flow meter using the 844 console.To do so, use either of the following methods:

Method 1 – Known Volume

Step 1 – Known Value

Select a known volume of water (n) that you will pump through the flow meter.In these steps, 10 US gallons (38 liters) {8 Imperial gallons} will be used as an example.The specific volume you use is not impor tant, although larger volumes generally produce more accurate results.

Step 2 – Programming Calibration Number

Go into the System Setup mode and advance to the flow meter calibration number step (flashing turbine at the top of the display).In this programming step, enter (n) 10 US gallons (38 liters) {8 Imperial gallons} as the calibration number.Exit the System Setup mode by depressing and holding the key for five seconds.

Step 3 – Resetting Volume Counter

Reset the total volume number that is displayed in the lower right portion of the display. (Display alternates between Ac (Ha) covered and the volume sprayed through the flow meter).To reset this number, press and hold the and keys simultaneously for three seconds or until you see the values reset to zero.

Step 4 – Spraying Known Volume

Engage the pump on the sprayer, flip the Master boom section of the 844 to “ON” (make sure at least one boom section switch is on), and pump exactly (n) 10 US gallons (38 liters) {8 Imperial gallons} through the flow meter.When the known volume is reached, shut the Master boom switch “OFF”.

Step 5 – Entering in New Flow meter Calibration Number

The number that is displayed in the lower right corner of the display is your new flow meter calibration number. Record this number, enter the System Setup mode and advance to the flow meter calibration number step. Enter the new value from your test into this step and then exit the System Setup mode.

Step 6 – Double-checking the New Value

Double-check your new value by spraying a larger volume of water, such as 100 US gallons (378 liters) {83 Imperial gallons} through the flow meter.Before spraying the larger volume, make sure to reset the memory counters by depressing and holding the and keys simultaneously for three seconds.

NOTE: After double checking the new calibration number, if you find that the volume shown on the display of the 844 is more than +/- 3% in error, change the flow meter calibration number in the System Setup mode by the % difference it is in error.

Example: If the volume displayed is 5% too high, then increase the flow meter calibration number by 5%. If the volume displayed is 5% too low, then decrease the flow meter calibration number by 5%.

Method 2 – Known Tip Size Method

Step 1 – Check Tip Size

Determine what size tip is on the sprayer. An actual flow collection should be done on a representative sample to ensure the tips are not worn.To do this, set the boom pressure at 40psi (2 bar).This must be pressure at the tips (i.e. use manual pressure gauge mounted on the boom). Collect flow for 1 minute from 1 tip.

Example: XR8004 tip should spray 0.4 gallons in 1 minute (1.29 LPM) {0.32 Imp Gal}

Step 2 – Count Tips

Count the total number of tips to be used for measure.You can use 1 boom section, 2 boom sections, etc.

Example: Boom Section 1 has 10 tips

Step 3 – Calculated Flow

Multiply the number of tips to be measured by the size (or individual flow rate) of each tip.

Example: 10 tips x 0.4 GPM (1.29LPM) {0.32 Imp GPM} = 4GPM (12.9 LPM) {3.2 Imp GPM}

Step 4 – Measure

Turn controller on and activate pump.Toggle on the Master Boom Switch and the number of boom sections to be measured. Insure that the pressure at the boom is maintained at 40PSI (2bar).While spraying press and hold the key in.Look at the lower right display to see if the measured flow matches the calculated flow.

Step 5 – Adjustments

If the measured flow does not match the calculated flow, the flow meter number may need to be adjusted.

If the measured flow is higher than the calculated flow, the flow meter calibration number needs to be increased.

If the measured flow is lower than the calculated flow, the flow meter calibration number needs to be decreased.

Example: Calculated flow is 4.00 GPM (12.9 LPM)

{3.20 Imp GPM}; measured flow is 3.6 GPM (11.6 LPM) {2.88 Imp GPM}

4.0 GPM - 3.6 GPM = 0.4 GPM

12.9 LPM - 11.6 LPM = 1.3 LPM

3.2 Imp GPM - 2.88 Imp GPM = 0.32 Imp GPM

Decrease the flow meter calibration number by 10%. If original number was 650, enter 585 for this programming value.

Flow Meter Calibration

= 0.1 x 100 = 10%

0.4GPM

4.00GPM = 0.1 x 100 = 10%

1.3LPM

12.9LPM

= 0.1 x 100 = 10%

0.32 Imp GPM

3.2 Imp GPM

Terms and Conditions of Sale

(1) MODIFICATION OF TERMS

Seller’s acceptance of any order is expressly subject to Buyer’s assent to each and all of the terms and conditions set forth below and Buyer’s assent to these terms and conditions shall be conclusively presumed from Buyer’s receipt of this document without prompt written objection thereto or from Buyer’s acceptance of all or any part of the goods ordered. No addition to or modification of said terms and conditions shall be binding upon Seller unless specifically agreed to by Seller in writing. If Buyer’s purchase order or other correspondence contains terms or conditions contrary to or in addition to the terms and conditions set forth below, acceptance of any order by Seller shall not be construed as assent to such contrary or additional terms and conditions or constitute a waiver by Seller of any of the terms and conditions.

(2) PRICE

Unless otherwise specified: (a) all prices, quotations, shipments and deliveries by Seller are f.o.b. Seller’s plant; (b) all base prices together with related extras and deductions, are subject to Seller’s price in effect at the time of shipment; and (c) all transportation and other charges are for the account of Buyer, including all increase or decrease in such charges prior to shipment. Payment of said price shall be due at the remittance address shown on the Seller’s invoice 30 days after the date of Seller’s invoice. Interest will be charged at a rate of 1

⁄2% per

month on all balances outstanding more than 30 days after the date of the invoice.

(3) MINIMUM BILLING

The minimum billing by the Seller for any order shall be $20.00.

(4) WARRANTIES

Seller warrants that its products will conform to and perform in accordance with the products’ specifications.

Seller warrants that the products do not infringe upon any copyright, patent, or trademark.

THE FOREGOING WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THOSE CONCERNING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

(5) LIMITATION ON LIABILITIES

Because of the difficulty of ascertaining and measuring damages hereunder, it is agreed that, except for claims for bodily injury, Seller’s liability to the Buyer or any third party, for any losses or damages, whether direct or otherwise, arising out of the purchase of product from Seller by Buyer shall not exceed the total amount billed and billable to the Buyer for the product hereunder. IN NO EVENT WILL SELLER BE LIABLE FOR ANY LOSS OF PROFITS OR OTHER SPECIAL OR CONSEQUENTIAL DAMAGES, EVEN IF SELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

(6) QUALITY ASSURANCE

Seller shall have no obligation to ensure that any goods purchased from Seller meet any special Buyer quality assurance specifications and/or other special Buyer requirements unless such specifications and/or other requirements are specifically set forth in Buyer’s purchase order and expressly accepted by Seller. In the event that any such goods supplied by Seller in connection therewith, are applied to an end use without the appropriate specification and/or other requirement therefore having been set forth in Buyer’s purchase order and expressly accepted by Seller, Buyer shall indemnify and hold Seller harmless against any and all damages or claims for damages made by any person for any injury, fatal or nonfatal, to any person or for any damage to the property of any person incident to or arising out of such application.

(7) CLAIMS

Claims respecting the condition of goods, compliance with specifications or any other matter affecting goods shipped to Buyer must be made promptly and, unless otherwise agreed to in writing by Seller, in no event later than one (1) year after receipt of the goods by Buyer. Claims respecting the failure of any TeeJet Automatic Sprayer Control System Component due to defective materials or workmanship must be made not later than three (3) years from the date of purchase. In no event shall any goods be returned, reworked or scrapped by Buyer without the express written authorization of Seller.

(8) DEFAULT IN PAYMENT

If Buyer fails to make payments on any contract between Buyer and Seller in accordance with Seller’s terms, Seller, in addition to any other remedies available to it, may at its option, (i) defer further shipments until such payments are made and satisfactory credit arrangements are reestablished or (ii) cancel the unshipped balance of any order.

(9) TECHNICAL ASSISTANCE

Unless otherwise expressly stated by Seller: (a) any technical advice provided by Seller with respect to the use of goods furnished to Buyer shall be without charge, (b) Seller assumes no obligation or liability for any such advice, or for any results occurring as a result of the application of such advice; and (c) Buyer shall have sole responsibility for selection and specification of the goods appropriate for the end use of such goods.

(10) CANCELLATION OF SPECIAL

ORDERS

Special Orders or goods specially manufactured for Buyer cannot be canceled or modified by Buyer, and releases cannot be held up by Buyer, after such goods are in process except with the express written consent of Seller and subject to conditions then to be agreed upon which shall include, without limitation, protection of Seller against all loss.

(11) PATENTS

The Seller shall not be liable for any costs or damages incurred by the Buyer as a result of any suit or proceeding brought against Buyer so far as based on claims (a) that use of any product, or any part thereof, furnished hereunder, in combination with products not supplied by the Seller or (b) that a manufacturing or other process utilizing any product, or any part thereof furnished hereunder, constitute either direct or contributory infringement of any patent of the United States.

The Buyer shall hold the Seller harmless against any expense or loss resulting from infringement or patents or trademarks arising from compliance with Buyer’s designs or specifications or instructions.

(12) COMPLETE AGREEMENT

The terms and conditions set forth herein, together with any other documents incorporated herein by reference constitute the sole and entire agreement between Buyer and Seller with respect to any order superseding completely any oral or written communications. No additions to or variations from such terms and conditions whether contained in Buyer’s purchase order, any shipping release or elsewhere shall be binding upon Seller unless expressly agreed to in writing by Seller.

(13) GOVERNING LAW

All orders are accepted by Seller at its mailing address in Wheaton, Illinois, and shall be governed by and interpreted in accordance with the laws of the State of Illinois.

Flow Meter Maintenance

DAILY MAINTENANCE

• Unscrew sensor from the flow meter assembly

• Remove flow meter from the system

(If Rapid Check, remove the rapid check unit from the body)

• Use clean water to wash any impurities out of the flow meter (out of the removable turbine unit if rapid check)

• Blow compressed air (Max.15 PSI/1 bar) through the flow meter (turbine unit) to verify that the turbine unit rotates freely

• Reinstall flow meter (turbine unit)

LONG TERM MAINTENANCE

• Should be performed every 50 hours of operation

• Unscrew sensor from the flow meter assembly

• Remove flow meter from the system

(If Rapid Check, remove the rapid check unit from the body)

• Use clean water to wash any impurities out of the flow meter (out of the removable turbine unit if rapid check)

• Place the flow meter (rapid check unit) in a detergent bath (can be diesel fuel) for a few hours

• Remove the flow meter (rapid check unit) from the detergent bath

• Blow compressed air (Max. 15 PSI/1 bar) through the flow meter (turbine unit) to verify that the turbine unit rotates freely

• Reinstall flow meter (turbine unit)

P.O. Box 7900

Wheaton, Illinois 60189-7900 USA

Phone (630) 665-5000 • Fax (630) 665-5292

tjtech@spray.com

2/99 MI844

Spraying Systems Co.

TeeJet 844 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual