What Does 'Calibrating a Sprayer' Actually Mean?

There are several definitions and interpretations of what 'calibrating a sprayer' really means. After researching this topic (extensively), I have concluded with a simple definition that will help you quickly understand everything you need to know. In this article, you will also learn about 3 calibration measurements that you must understand before calibrating your boom sprayer. Make note of the 'pro tips' given that I learnt from professionals that perform this task every season.

The Real Definition of 'Calibrating a Sprayer'

Sprayer Calibration Definition: To calculate and clearly understand the amount of liquid (spray chemical + water) you should apply on a certain size area. This is often measured in GPA (gallons per acre).

Remember: How fast you travel and at what pressure (PSI) you spray at equals the amount of chemical applied.

3 Types of Sprayer Calibration Measurements You Must Understand:

Although there are several ways to calibrate a sprayer, each method always requires three types of measurements that must be clearly understood.

1. Travel speed - This refers to the speed you should travel while spraying. Simple fact: The faster you travel, the amount of liquid applied will decrease.
2. Nozzle output - This simply means the amount of liquid that should be coming out of your nozzle. This will determine if you need to replace any nozzles. It will also help you calculate how fast you should travel and at what pressure (PSI) you should be spraying at.

   Pro tip #1: If any one nozzle’s output deviates from the manufacturers’ guidelines by more than 10%, the nozzle should be replaced or cleaned.

   Pro tip #2: You will find your nozzle output amount on the spray nozzle manufacturers nozzle chart.

3. Distance between nozzles - This simply refers to the measurement between each nozzle on your spray boom. This will determine the distance you travel when calculating how much chemical is applied. Simple fact: The closer your nozzles are on your spray boom, the amount of chemical applied will increase.

Now you understand what 'calibrating a sprayer' actually means, it's time to perform this simple (seems complicated at first) task with your own sprayer. To learn how to calibrate your sprayer in 8 quick steps, click below. If you have any questions or comments, comment below and I will help out where I can.