Need help with the Liquid Pressure Sensor?

Select from the list of frequently asked questions and troubleshooting tips below to find the answer.

Liquid Pressure Sensor FAQs

Q: The console won’t turn on.
A: This may be the result of one of the following issues: 1. Blown fuse. 2. Battery connections. Don’t use an in-cab convenience plug. 3. Damaged power cable. 4. Control console is defective.

Q: The APER message keeps flashing, and the alarm sounds, indicating that the control valve is at its maximum open position.
A: This may be the result of one of the following issues: 1. Control valve is defective, or it’s cabling. 2. Pressure transducer is defective, or it’s cabling. 3. Control console is defective.

Q: The application rate is incorrect.
A: This may be the result of one of the following issues: 1. Improper sprayer plumbing—pinched product lines, improperly sized nozzle feed lines, restricting elbows, tees and other plumbing parts. 2. Inaccurate nozzles (i.e. worn or plugged). 3. Incorrect constants entered into CCS100 memory. 4. Improper installation or location of pressure transducer.

Q: The fuse blows when it’s replaced.
A: This may be the result of one of the following issues: 1. Main harness is pinched or cut, or insulation rubbed off. 2. Switch module, control console, ground speed sensor, or optional lift switch is defective. 3. Implement harness is pinched or cut, or insulation rubbed off. 4. Pressure transducer, control valve, or optional nozzle monitor flowmeter is defective.

Q: The rate fluctuates dramatically while in auto.
A: This may be the result of one of the following issues: 1. System response number is too high. 2. Speed sensor is not reading speed correctly. (Speed sensor is bad or there’s excess vibration). 3. Sparge/return line is not open enough or is closed too far.

Q: CMS reads speed while sitting still.
A: This may be the result of one of the following issues: 1. Radar is vibrating; check mounting. If you can grab the radar with your hand from the side and the speed reading stops, you have a vibration problem. 2. Radar is defective.

Q: What is nozzle capacity pressure and nozzle flow capacity?
A: These two set-up positions describe what nozzles you are using. Simply stated, the nozzle capacity pressure is only a pressure reference. And the nozzle flow capacity measures how many gallons of water flow out of that nozzle in one minute at that pressure reference. Using these two numbers, the console will then know how much flows from that nozzle at any given pressure.

Q: The rate fluctuates dramatically while in auto.
A: This may be the result of one of the following issues: 1. System response number is too high. 2. Speed sensor is not reading speed correctly. (Speed sensor is bad or there’s excess vibration). 3. Sparge/return line is not open enough or is closed too far.

Q: Does the pressure entered in nozzle capacity pressure have to match the pressure being sprayed? Is there an ideal pressure I can use?
A: No, it does not. You can enter any pressure that you like into nozzle capacity pressure. However, it’s best to use a pressure that is within the working pressure limits of the nozzle you have selected. There really is no ideal pressure, but 40 psi is probably the most popular choice. Just remember to use the correct flow rate for the pressure selected.

Q: My applicator has XR8004 nozzles with 20-inch spacing on two booms. I’m using 40 for nozzle capacity pressure and .4 for nozzle flow capacity. My pressure transducer is mounted between the DICKEY-john valve and the boom shutoff valve. I’ve found t
A: There is a difference in pressure between the pressure transducer and the nozzle. Pressure drops occur in any sprayer, and the distance from sensor to nozzle determines the amount of the loss. In this case, the system is controlling the application based on the pressure at the sensor, but the nozzles with a lower pressure are under-applying. To correct this problem, either move the sensor to the boom next to a nozzle, or do a catch test at the current pressure entered into the nozzle capacity pressure. Catch a few nozzles on each boom, average the results, and enter this as your nozzle flow capacity. This method compensates for pressure losses that may be occurring.

Q: When I set my pressure limits, the speed ranges display are very high or very low. How can I fix this?
A: 1. Check your nozzle flow capacity constant. It is either too high or too low. Also be sure you don’t have a decimal point misplaced. 2. Check the conversion factor constant H. The Conversion factor for water is 1.00.

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