TeeJet TECHNOLOGIES 845 Sprayer Control
Quick Start Guide
Power On the Console
- The console will initially display the software version at the top of the screen and the serial number of the console at the bottom of the screen.
- After approximately 3 seconds, the console will enter the work screen.
Power Off the Console
- While pressing and holding the MINUS button, press and release the PROGRAM button.
- Release the MINUS button. The console will save new information (area and volume counters) to memory before it powers down. Pressing any key during the power-off countdown will cancel the shutdown function.
- Automatic Shutdown With the Master Switch in the “OFF” position, the console will automatically shut down after 10 minutes of no inputs (or at the time specified in the Automatic Shutdown Time setting in the OEM Setup Mode)
System Start Up Mode
- The Master Switch must be off. Press and hold the PROGRAM button until the Program System menu screen appears (approximately 3 seconds).
Advance to the Next Option
- Press the PROGRAM button to advance the system to the next Program step.
- After the final setup option is complete, the console will return to the initial setup option.
Exit the System Setup Mode
- Press and hold the PROGRAM button for 3 seconds.
- The inputs are stored, and the console will exit the setup mode.
Reference Guide
| Step | Display | Description | Default |
Units  | Select the units for operation. Options include: US, SI, Turf, NH3, IMP, LM2, GLM, LKM. See the manual for unit details. | US | |
Restore Defaults | If the units of measurement are changed, default values for all settings must be restored. X Yes – Units WILL be changed, and value WILL be reset. X No – units will NOT be changed, and value will NOT be reset. | Yes | |
TeeJet Technologies
| Step | Display | Description | Default |
| Simulated Ground Speed – High Speed |  | Set simulated high speed. | 9.0 mph 15.0 km/h |
| Minimum Speed |  | Set the minimum speed at which the console automatically shuts the boom sections off to eliminate an operator function when slowing to stop or turn around. There will be no spraying below this speed. When the sprayer speed exceeds the established Auto Master Off Speed, the boom sections turn back on. Set this value to “0” to disable. | 2.0 mph 3.0 km/h |
SETUP MODE
- Press and release the PROGRAM button once to display the Program User Menu screen. Press and release the PROGRAM button again within 3 TeeJet TECHNOLOGIES 845 Sprayer Control seconds to enter the setting options.
- Program step. After the final setup option is complete, the console returns to the initial setup option.
Exit the Mode
- Press and hold the PROGRAM button forTeeJet TECHNOLOGIES 845 Sprayer Control 3 seconds.
- The inputs are stored, and the console will exit the setup mode.
Activate Density Factor
- At any time in Application Setup Mode, pressing the AUTO/MAN button will toggle the density symbol (‘D’) on or off.
- When the density symbol is on, the density value (set in System Setup mode) will be used in the regulation algorithms. If the density symbol is off, the density factor will not be used.
Operation Mode
| Feature and Display | Description | |||
| Tank Level
| Used to show and/or set the actual content level in the tank. This level will decrease by the amount being sprayed. If the minimum tank level has been set to a value greater than zero and the actual level becomes less than the minimum level, a tank alarm will be triggered. Setting the minimum tank level to zero will disable the tank alarm function. View Tank Level – Start from the work screen with the Master Switch “OFF”. 1. Press and release the PLUS button and MINUS button simultaneously. Adjust Tank Level – Start from the work screen with the Master Switch “OFF”. 2. Use the PLUS and MINUS buttons. Or press the MAN/AUTO button to reset the tank level to maximum. 3. Press the PROGRAM button to confirm the selection and exit to the normal work screen. | |||
| Clear Counters
| Used to reset the total area, total volume, and total distance counters to zero. Start from the work screen with the Master Switch “OFF”. 1. Press and hold the MAN/AUTO button for 3 seconds. 2. Use the PLUS or MINUS buttons to select “YES”. 3. Press the PROGRAM button to confirm the selection and exit to the normal work screen. | |||
| Feature and Display | Description | |||
| Simulated Speed
| Allows the verification of console functions and the sprayer without actually moving the sprayer. Activate the Simulated Speed – While on the work screen without the machine in motion and the Master Switch in the “On” position: X Activate Low Simulated Speed – While pressing and holding the PROGRAM button, press and release the MINUS button. X Activate High Simulated Speed – While pressing and holding the PROGRAM button, press and release the PLUS button. | |||
Alarm System
| Alarm Name | Display | Description | Audible Alarm Type |
| Rate Alarm |  | Too high a difference between the target and the actual rate. | High Priority (3 short beeps, repeated every second) |
| No Speed Alarm |  | If speed is zero with the master on, then no speed alarm is triggered, and spraying is stopped. | Medium Priority (2 short beeps, repeated every second) |
Customer Support
- Tel: (502) 912-0055
- Website: @teejet.com
FAQs
Q: What is the primary function of the TeeJet 845 Sprayer Control?
Ans: For agricultural sprayers, the 845 is an automatic rate controller. It assists operators in maintaining accurate and consistent spraying operations by tracking and regulating liquid application rates, speed, and area coverage.
Q: What types of sprayers are compatible with the 845 controller?
Ans: If the sprayer has the appropriate piping, sensors, and valves that the TeeJet 845 system supports, it can be used with tractor-mounted, pull-type, and self-propelled sprayers.
Q: Does the 845 control both manual and automatic spray operations?
Ans: Indeed. Both automated rate control based on speed and target rate inputs and manual override control are supported by the 845. Direct mode switching is possible for operators from the console.
Q: Can the 845 system monitor total acres and volume applied?
Ans: Indeed, the 845 continuously records and shows the entire area sprayed, the amount of liquid used, and the current flow rate. Additionally, it offers cumulative totals for documentation purposes.
Q: What is the operating voltage of the 845 console?
Ans: The TeeJet 845 requires a clean, steady power source to function, and it runs on 12V DC. Accurate sensors and system stability depend on a proper ground.
Q: Can I change application rates on the go?
Ans: Indeed. Throughout othe peration, the 845 enables rapid rate changes. Multiple preset target rates can be specified and stored, and you can switch between them right from the console.