844-AB SPRAYER CONTROL USER GUIDE MANUAL For use with software version 4.02.
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844-AB Table of Contents CHAPTER 1 - INTRODUCTION 3 Power on the console........................................................................................................................................................................................... 3 Power off the console..........................................................................................................................................................................................
844-AB Faces per section setting (HC mode only)..................................................................................................................................................13 CHAPTER 5 - SWATH WIDTH PRESETS 14 Selecting swath preset......................................................................................................................................................................................14 CHAPTER 6 - APPLICATION SETUP 15 Preset flow rate selection.........
844-AB CHAPTER 1 - INTRODUCTION This user guide provides information for software version 4.02. Make sure that all hardware components are properly installed and tested. Before starting the programming process, confirm that the console and all sensors are working properly. IMPORTANT! Before beginning, review the following programme guidelines that control the programming process. To exit any Setup mode, press and hold the Programme mode. key for 3 seconds.
844-AB CHAPTER 2 - APPLICATION MODE The 844-AB gives the possibility of working in two different ways to fit the application. Therefore, the console should be set up and consequent programming and working features will be dependant of the chosen mode. Airblast mode This mode is designed to work with Airblast sprayers, mostly spraying on two sides (left and right) with the possibility to switch on or off sections in the height. The working width is defined by the distance between two rows of trees.
844-AB Minimum voltage Display stable Figure 8: Minimum voltage Figure 11: Display stable This will determine the minimum voltage that can be applied to the regulation valve. If too low, the valve won’t fine tune the dose rate. If too high, the valve could have some unstable regulation. This will determine allowed tolerance percentage on the displayed dose rate. If the difference between the real and the target dose rates is smaller than it, the target will be displayed. 5 3.
44-AB Memory option Tank content This feature enables the user counters. Select NO to disable this feature or YES to enable it. Figure 14: Memory option This feature enables a tank content counter. This counter should be set after filling the tank and will count down according to the sprayed volume. A zero value will disable this feature.
844-AB Reset to default Flow meter impulses If units of measurement changes were made, the console will display a message asking if programme parameters should be reset to default before advancing to the next screen. Use the Plus or Minus keys to select either “Yes” or “No” on the screen. Press the Programme key to accept the value and advance to the next programme step. During the Flow meter impulses step, the symbol (flow meter turbine) will flash at the top of the console.
844-AB Press the Programme key. The console will ask for the volume that was sprayed. Use the Plus or Minus keys to adjust the value to match the volume sprayed in litres. Figure 22: Calibration procedure Automatic calibration Make sure the sprayer pump is turned “Off” and there is no pressure in the system. Press and release the Plus and Minus keys simultaneously to activate the auto-calibration feature. The message “MES” will be displayed.
844-AB Speed sensor calibration Figure 30: Speed sensor automatic calibration The speed sensor must be calibrated in order to provide the proper speed and area readings. The value is determined by the number of impulses generated by the speed sensor in 100 metres, or by manually entering the number. CAL NOTE: During speed calibration, the 844-AB will automatically sense whether a Wheel speed or Radar speed sensor is being used.
844-AB Automatic calibration To automatically calibrate the radar speed sensor, mark a distance of exactly 100 metres. Press the Plus and Minus keys simultaneously to clear the contents of the display and to activate auto calibration mode. Once auto calibration mode is activated, “RAD” will be displayed on the lower left of the screen. Figure 32: Radar speed sensor automatic calibration 1 2 3 4 118 5 6 7 8 9 10 11 12 Drive toward the initial point of the designated 100 metres.
844-AB Reference flow rate per section AB mode – The flow rate for each section of the sprayer must be input into the 844-AB console so that the necessary adjustments can be made when boom sections are shut off. The console is programmed to treat the left and right boom sections as symmetrical; therefore the console treats the flow rate for the lower left section (L1) identically to the flow rate of the lower right section (R1).
844-AB Regulating valve response time Operating conditions may require a higher or lower response speed for the regulating valve. To change the response time number, use the Plus or Minus keys to increase or decrease the number. Any number between 0.0 and 9.9 may be selected (0=Slow; 9=Fast). The default value is 9.5. The first digit establishes the speed for coarse adjustments (when relatively far from the target rate).
844-AB Density (Liquid specific gravity) The default value of “1.00” corresponds with the specific gravity of water and is correct for most pesticide applications. Some spray solutions, such as fertiliser, have different densities. If such a material is being used, a new value should replace the default. Figure 44: Density display Communications If the 844-AB has been upgraded and is communications compatible, a variety of communications options can be entered.
844-AB CHAPTER 5 - SWATH WIDTH PRESETS The 844-AB can be programmed with up to 6 swath widths. This allows the operator to easily change from one swath to another during application. (This is essential when spraying orchards that have varying swath widths.) To enter Swath width presets mode, press and hold the GREEN button for 3 seconds. The swath width setting screen for preset number 1 will be displayed.
844-AB CHAPTER 6 - APPLICATION SETUP Application Setup mode contains the most frequently changed setup parameters (target application rate and nozzles used). TeeJet has added this separate setup mode to speed the programming process when minor changes are made during operation (e.g., changing orchards, switching nozzles, changing crops, etc.). To enter Application Setup mode, while in Operations mode press the Programme key twice (within 3 seconds).
844-AB Adjust pressure If an approximate operating pressure is known, use the Plus or Minus keys to adjust the value. The 844-AB will determine what operating speed is required to achieve the target application rate at the entered pressure. If the speed is too high, a set of smaller nozzles is necessary. If the speed is too low, a set of larger nozzles is necessary.
844-AB CHAPTER 7 - OPERATIONS Before operating, check connections related to the Sprayer control assembly. The sensors should be checked to ensure the console receives uninterrupted signals. IMPORTANT! When work occurs around a sprayer/farm chemicals, wear protective clothing and eye wear. Partially fill the sprayer tank with water to flush the system. Perform an inspection of the spray nozzles to ensure they are spraying the correct pattern. The Master Boom Switch should be in the “Off” position.
844-AB CHAPTER 8 - FEATURES Boost mode Increased or decreased chemical application may be required during certain areas of application. The Plus and Minus keys allow for easy adjustment. Boost mode can be activated while spraying during “Auto” mode by pressing either the Plus or Minus keys once. With each subsequent press of the Plus key, the application rate will increase by 10%. With each subsequent press of the Minus key, the application rate will decrease by 10%.
844-AB No flow alarm If the 844-AB stops receiving impulses from the flow meter, the turbine symbol will flash at the top of the display. This indicates 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 are set to the “ON” position. Figure 63: No flow alarm 0.00 0.00 5.8 Bar 1 2 3 2.
844AB S PU R AY E R C O N T R O L S E R G U I D E M A N U A L TeeJet Aabybro Mølhavevej 2 DK 9440 Aabybro Danmark www.teejet.
