Before calibration proper cleaning and preparation are essential. First remove the collection funnel and measuring cylinder from the rain gauge. Clean all parts with clean water to remove dust leaves dirt and insect debris that may block the funnel or affect water level reading. Check for cracks scratches or deformation on the funnel and cylinder. Damaged parts cause measurement errors and should be replaced. Dry the components completely before reassembly. Youtong rain gauges have easy disassembly design making cleaning and preparation simple. Regular cleaning before calibration prevents debris interference and ensures accurate test results.
The most practical calibration method uses a container with known water volume. Prepare a measuring cup with clear volume markings such as 100ml or 200ml. Place the rain gauge on a flat level surface to avoid tilting errors. Slowly pour the measured water into the collection funnel at a steady rate similar to natural rainfall. Observe the reading on the rain gauge display or scale. Compare the displayed rainfall with the calculated equivalent rainfall. For example 100ml water in a standard funnel equals a specific millimeter value. Adjust the sensor or scale according to the difference. Repeat the test two or three times for consistency. Youtong rain gauges support manual calibration through simple settings.
Regular maintenance after calibration keeps a rain gauge accurate over time. Clean the funnel and cylinder every month to remove dirt and debris. Check the installation stability to ensure the device remains level. Inspect for signs of aging such as cracks or fading and replace parts when necessary. Avoid placing the rain gauge under trees or buildings that block rainfall. Keep the area around the gauge clear of plants that may interfere with water collection. Youtong provides user manuals with detailed maintenance schedules. Following these tips reduces calibration frequency and maintains consistent rainfall readings for years.