The purpose of the strainer is to remove the particles that could clog the nozzle opening. Slotted strainers should be used with wettable powders and are sized in equivalent mesh sizes of 50 and larger. The side boom must be operated at a height of 6 to 12 inches to pass beneath tree skirts. To operate a boom that low, close nozzle spacing or wide angle nozzles can be used. The most important aspect of preparing a sprayer for the season is calibration.
Proper calibration is essential for safe, economical and effective weed control.
Users should calibrate a sprayer prior to its initial use and periodically during operation. All of these factors must be considered to calibrate a sprayer, and the first four can be changed individually or collectively, for different applications. This method is based on nozzle spacing and the time to travel a specific course length. The table below provides the course length for different nozzle spacings on the boom. Drive that distance while recording the time.