Significant errors in sprayer calibration can be caused by

• A. Leaking Hoses
• B. Incorrect Nozzle Size
• C. Worn Pump Seals
• D. All of the Above

Answer: (D)

When you calibrate a sprayer, you’re relying on steady, known flow and pressure to deliver the exact amount of product per area. Leaking hoses let some of the liquid escape before it reaches the nozzle, so the actual volume delivered is less than what the calibration assumed and pressure can become unstable, leading to under- or uneven application. Using a nozzle that isn’t the correct size changes the flow rate and the spray pattern; if the nozzle is too large, you’ll apply more product per acre than planned, and if it’s too small, less, so the calibration no longer matches what’s happening in the field. Worn pump seals can’t maintain consistent pressure and can cause fluctuations in flow, producing variable application rates and poor coverage. Because calibration depends on accurate flow and pressure across the system, any of these issues can create significant errors. All of the above are possible causes of calibration errors.