844-E Sprayer Control U se r M AN U AL Installation, Programming and Operating
844-E Sprayer Control Table of Contents Chapter 1 - introduction 1 Chapter 2 - Mounting Sprayer Components 2 Pressure Regulator in Bypass Mode................................................................................................................................................................ 2 Pressure Regulator in Throttling Mode..........................................................................................................................................................
844-E Sprayer Control User Program Tip.................................................................................................................................................................................................16 User Programmable Tip................................................................................................................................................................16 Pressure Regulation...........................................................................
844-E Sprayer Control Chapter 7 - Flow meter Calibration 29 Method 1 – Known Volume.............................................................................................................................................................................29 Step 1 – Known Value..................................................................................................................................................................29 Step 2 – Programming Calibration Number...........................
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 fingertip convenience and ease of operation. Installation and Programming of your control system will be covered in easy to follow, step-by-step instructions.
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.
844-E Sprayer Control Figure 2: Bypass Plumbing Diagram - Flow Based System Pressure Regulator in Throttling Mode The pressure regulating valve, as shown in the figures 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.
44-E Sprayer Control Figure 4: Throttling Plumbing Diagram - Pressure Based System 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 the direction of flow arrow pointing toward the boom control valves. Refer to Figures 2 and 3.
844-E Sprayer Control Installing the Speed Sensor Assembly 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.
844-E Sprayer Control 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.
844-E Sprayer Control Speed Step 4 - 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.
844-E Sprayer Control Console Step 3 - Power Connection Locate the power cable that has a black connector on one end and two battery terminal rings on the other. Extend the battery terminal ring 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 are a total of 12 Volts delivered to the controller by connecting to the (+) terminal on one battery and the (-) terminal on the other battery.
844-E Sprayer Control Console Step 4 - Connecting Component Cables 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 main cable that attaches to the boom control valves, the pressure regulating valve, flow meter and/or pressure sensor, a magnetic wheel speed sensor, and a proximity speed sensor or radar speed sensor.
844-E Sprayer Control Connect Step 1 - Wiring Layout Determine the best cable routing to the sprayer control components on the sprayer. This may 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 ft / 1 m from areas of excessive vibration (i.e. engines) to avoid high frequency interference.
844-E Sprayer Control Connect Step 2 - Making The Connection Now, extend the cable 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 the diagram on page 10. Repeat this procedure with the cable leads to the Pressure Regulating Valve and the Boom Control Valves.
844-E Sprayer Control Figure 18: Pressure Sensor Connector Pressure Sensor Connector Pin No. Wire Color Signal Name A White Power Out B Black Pressure Signal C N/C Pin No. Wire Color Signal Name A Brown Power Out B White Flow Signal C Green Sensor Ground Pin No.
844-E Sprayer Control Chapter 3 - Programming 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. • Pressing the Program key once will flash “ ” in the upper left hand corner of the display window.
844-E Sprayer Control 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 Plus key and Minus key simultaneously. While holding the Plus key and Minus key in, press the Program key twice (within three (3) seconds), and release to enter the System Setup Mode.
844-E Sprayer Control Pressure Transducer Nozzle Spacing Default = 20 (inches in US, trF, and INP Modes) Maximum rating (P Hi) N Default = 150 (PSI in US, trF and I P 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.
844-E Sprayer Control User Program Tip Pressure Regulation User Programmable Tip Pressure Regulation Mode Default = 0.00 While in the User Programmable Tip step, the tip indicator arrow will be flashing above the P tab at the bottom of the display. In some cases you may find that nozzles other than those preprogrammed 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 manually program a tip.
844-E Sprayer Control Regulation Adjustment Speed Default = 9.5 (byp Mode) will be flashing at the top While in this step, the regulator symbol 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 Plus key and Minus key to increase or decrease the number.
844-E Sprayer Control Calibrate Speed Speed Sensor Calibration 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 calibrate speed symbol value (250) will be displayed in the lower right corner of the display. will be flashing at the top of the display.
844-E Sprayer Control Distance Counter Program Specific Gravity 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.
844-E Sprayer Control Communications Application Setup Mode n Default = no CO (no communications) This step lets you select what type of communication you will be using. The choices available are the default of “no CO ” (no communications), “prt” (Printing Capability), “gps” (Global Positioning Communication Capability), or “lOg” (Downloading to a PC on the go capability). n Use the Plus key or Minus key to select the type of communication you will be using.
844-E Sprayer Control 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 indicator arrow flashing at the bottom of the display just above a color coded strip. will be NOTE: The tabbed color strip along the bottom of the display represents color coding for TeeJet® VisiFlo® spray tips.
844-E Sprayer Control Calculation Troubleshooting This Programming Step is a diagnostic tool only This programming step 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.
844-E Sprayer Control Chapter 4 - Operating Instructions 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 in line, and properly secured. WARNING: W henever you are working around a sprayer or farm chemicals, be sure to wear protective clothing and eye wear.
844-E Sprayer Control Chapter 5 - Features 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 Plus key and Minus key will allow you to easily make the necessary adjustments. The boost mode can be activated while spraying in the Auto mode by pressing either the Plus key or Minus key once. With each subsequent press of the Plus key , the application rate will be increased by 10%.
844-E Sprayer Control Printing Optional printers are available for printing a spraying report directly from the 844. The optional printers 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.
844-E Sprayer Control chapter 6 - Troubleshooting Guide Condition Possible Cause Solution 1. A pplication Rate Units (GPA, G/1000 ft2 I/Ha) continually flash on/off A. C ontinuous discrepancy of 10% or more between Target Application Rate and Actual Application Rate Check all components and programming steps related to flow Programming B. Flow meter pulses In the System Setup mode, move to the Flow Meter Pulses section on page 14 of the 844 Installation Manual.
844-E Sprayer Control Condition 3. Flow meter turbine symbol Possible Cause Solution A. Stalled Flow meter Make sure there is no pressure in the system. continually flashes on/off 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.
844-E Sprayer Control Condition Possible Cause Solution 6. A pplication Rate Units (GPA, G/1000 ft2 I/Ha) continually flash on/off A. S peed sensor not calibrated correctly Recalibrate the magnetic or radar speed pulses in the Calibrate Speed section of the System Setup Mode on page 18 of the 844 Installation Manual B. Incorrect nozzle spacing Check the Nozzle Spacing section in the System Setup Mode on page 15 of the 844 Installation Manual to ensure the correct nozzle spacing has been entered.
844-E Sprayer Control Chapter 7 - 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.
844-E Sprayer Control 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 40 psi (2 bar). While spraying press and hold the Program 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.
844-E sprayer control U s e r M a n u a l • 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 flexibility • Five boom section switches plus master shutoff • Built in application planning tool • Durable, weather-resistant aluminum housing • Single cable connection f
