<p>The area covered by one spray tank depends on the pump, nozzle, pressure, walking speed, row spacing, and crop canopy. Guesswork can cause uneven application. <strong>Calibration</strong> means using clean water to measure how much spray volume the equipment delivers under real operating conditions.</p>
<h2>Prepare the sprayer</h2>
<ul>
<li>Wear gloves and inspect the tank, hose, lance, and joints for leaks.</li>
<li>Clean filters and nozzles without enlarging the opening with wire or a sharp object.</li>
<li>Replace worn or mismatched nozzles.</li>
<li>Perform calibration with clean water, never pesticide.</li>
</ul>
<h2>A simple measured-area method</h2>
<ol>
<li>Mark a representative area of known length and width.</li>
<li>Fill the tank with a measured amount of clean water.</li>
<li>Spray at the normal speed, pressure, and nozzle height.</li>
<li>Measure the remaining water to find the volume used.</li>
<li>Scale that volume to the total field area.</li>
</ol>
<p>If output is too high or low, first check the nozzle, pressure, leaks, and walking speed. Excess pressure can create fine droplets that drift away, while a worn nozzle may discharge too much liquid.</p>
<h2>Calculating product quantity</h2>
<p>Calibration determines actual water volume; it does not change the product dose. Determine the product quantity from its label's area-based directions, then calculate tank mixtures using the calibrated area covered by each tank. Do not exceed the label rate.</p>
<h2>Safety essentials</h2>
<p>Wear the protective equipment required by the product label, mix in a ventilated area, avoid spraying in unsuitable wind or weather, and protect people, animals, water sources, and neighbouring crops. Never clear a blocked nozzle with your mouth.</p>
<p><strong>Takeaway:</strong> Recalibrate whenever you change the nozzle, pressure, operator, speed, crop canopy, or equipment.</p>