When using a rangefinder, what should you do to ensure accuracy?

To ensure accuracy when using a rangefinder, it is essential to calibrate it periodically. Calibration involves adjusting the device to align its readings with a known standard or reference point, allowing it to measure distances accurately. Over time and with regular use, factors such as mechanical wear or environmental conditions can affect the rangefinder's precision. By scheduling periodic calibrations, users can maintain the reliability of their measurements, ensuring they have the correct distance readings for effective aquatic weed control applications. This proactive approach mitigates potential errors in measurement that could arise from a lack of calibration.

The other approaches do not fully address the need for consistent accuracy. Checking the device once a month might not be frequent enough to ensure precision, particularly in fast-paced or changing environments. Only using the rangefinder in flat areas limits its utility and does not ensure dependable accuracy in varying terrains. Relying solely on visual confirmation can lead to subjective errors, as visual estimations can be misleading and are not reliable compared to the objective data provided by a properly calibrated rangefinder.