How to Calibrate LESCO® Equipment to Maximize Investment

Calibration is the key to making sure your equipment applies the right amount of product exactly where it’s needed. When done correctly, it not only improves performance and results but also directly impacts your return on investment (ROI) by reducing waste and avoiding costly reapplications.

Understanding Calibration

What is Equipment Calibration?

Equipment calibration is the process of adjusting your spreader or sprayer so it applies the correct amount of product over a specific area. In simple terms, it ensures your equipment is ready to deliver exactly what the label or application plan recommends.
For example, calibrating a LESCO broadcast spreader means adjusting the gate opening so granular fertilizer is distributed evenly at the intended rate. Similarly, calibrating a backpack sprayer involves setting the proper nozzle, pressure and walking speed to achieve consistent liquid coverage.

Why Calibration is Critical

Proper calibration is essential for several reasons:

• Prevents over-application and waste: Applying too much product increases costs and reduces efficiency.
• Ensures consistent results: Uniform application leads to healthier, more attractive turf and landscapes.
• Protects plant health and compliance: Over- or under-applying products can damage turf and may violate environmental regulations.

Types of LESCO Equipment That Require Calibration

To maintain performance across operations, multiple types of equipment must be calibrated regularly:

• Broadcast spreaders: Designed for wide-area coverage and require precise gate adjustments.
   
• Drop spreaders: Offer targeted placement and need accurate width and flow calibration.
   
• Backpack sprayers: Common for spot treatments and rely on pressure and nozzle accuracy.
   
• Ride-on spreader-sprayers: Combine speed and efficiency but require careful balance of output and travel speed.

Key Factors Affecting Calibration

Understanding these variables ensures accurate calibration:

Travel Speed (Operator-Specific)

Travel speed is the first of two critical variables in calibration. Whether walking behind a spreader, carrying a backpack sprayer or operating a ride-on spreader-sprayer, each applicator may move at a different speed.

Because application rate is directly tied to speed, calibration should be performed for each applicator. Using the same equipment settings for multiple operators without accounting for differences in travel speed can lead to over- or under-application of product.

Before adjusting equipment settings, determine the operator’s typical speed over a measured distance. Once travel speed is established, equipment output can be adjusted to achieve the desired label application rate.

Application Rate

This determines how much product is applied per unit of area (e.g., pounds per 1,000 sq. ft. or gallons per acre). Every product has a recommended label rate that must be followed for optimal performance and compliance.

Rate of Product Distribution

The second critical calibration variable is the rate at which the equipment releases product.

For spreaders, this is controlled primarily through gate settings. For sprayers, it is influenced by nozzle selection, pressure and flow rate. Once the operator's travel speed is established, product flow can be adjusted to achieve the desired application rate.

Equipment Settings

Critical adjustments include:

• Spreader gate openings
• Spray pressure levels
• Nozzle type and size

Product Type

Granular and liquid products behave differently. Granules vary in size and weight, while liquids depend on pressure and droplet size, each requiring unique calibration approaches.

Step-by-Step Calibration Process

Calibration involves balancing two variables: the applicator's travel speed and the equipment's rate of product distribution. Travel speed should always be established first, followed by adjustments to product flow to achieve the target application rate.

1. Preparation

Set yourself up for success by:

• Reviewing manufacturer and product guidelines
• Inspecting equipment for worn parts, damage or clogs
• Choosing a test area with known dimensions
• Determining the operator's travel speed over a measured distance

2. Measuring Output
To determine actual output:

• Calculate the target application rate
• Perform a test run over the calibration area
• Collect and measure the product used

For spreaders, this often involves weighing product before and after application. For sprayers, measure liquid output using a container over a set time or distance.

3. Adjusting Settings

If your output doesn’t match the target rate:

• Adjust spreader gate openings or spray pressure
• Modify nozzle selection if needed
• Repeat the test until the correct application rate is achieved

4. Recording Results

Once calibrated:

• Document your settings (speed, pressure, gate opening)
• Maintain a calibration log for each piece of equipment and applicator

This saves time and ensures consistency across crews and future applications.

Common Calibration Mistakes to Avoid

Avoid these frequent issues that can undermine your results:

• Skipping calibration entirely: Even experienced operators can’t rely on guesswork.
• Failing to account for operator travel speed: Different applicators rarely travel at the same speed, which can result in over- or under-application when using identical equipment settings.
• Using incorrect product charts: Always match settings to the specific product being applied.
• Overlooking worn or clogged components: Damaged equipment leads to inaccurate output.
• Using the same calibration settings for multiple applicators: Calibration should be verified for each operator to ensure the desired application rate is maintained.

Best Practices for Maximizing Your Investment

Routine Calibration Schedule

Calibrate equipment regularly at the start of each season and anytime you switch products or notice inconsistent performance.

Proper Equipment Maintenance

Keep equipment in top condition through:

• Routine cleaning after use
• Lubrication of moving parts
• Timely replacement of worn components

Operator Training

Consistency starts with your team. Train operators to:

• Maintain steady speeds
• Follow calibration procedures
• Recognize signs of improper application

Use of Calibration Tools

Improve accuracy with tools such as:

• Catch trays
• Measuring cylinders
• Scales

These simple additions make calibration faster and more precise.

Cost Savings and ROI Benefits

Investing time in calibration delivers measurable returns:

• Reduced product waste: Apply only what’s needed and nothing more.
• Improved efficiency: Cover areas evenly in fewer passes.
• Lower reapplication costs: Achieve desired results the first time.
• Extended equipment lifespan: Proper setup reduces strain and wear.

Ultimately, calibration ensures you’re getting the most out of both your materials and your equipment investment.

Calibration isn’t a one-time task. It’s an ongoing process that directly impacts quality, efficiency, and profitability. By taking the time to properly calibrate your LESCO equipment, you ensure consistent application, protect plant health and maximize your investment.

For even greater operational efficiency, pair proper calibration practices with insights from our Leveraging Technology to Keep Your Crew Energized and Efficient article, helping your team work smarter, not harder, every day.