What factors can affect mass flow calibration accuracy?

Mass flow calibration accuracy is influenced by several factors, and one of the most significant aspects is the flow rates outside of the calibration range and seasonal changes. When calibration is performed, it typically occurs at specific flow rates. If the actual flow rates during harvest differ significantly from these calibrated rates, the accuracy of the yield measurements can suffer.

Additionally, seasonal changes can affect crop moisture content, which can alter the mass flow dynamics. For instance, crops harvested earlier in the season may have different moisture levels compared to those harvested later, influencing the mass flow sensor's readings. This variability must be accounted for to ensure accuracy in yield monitoring and data analysis.

Other factors such as routine maintenance and the use of a single type of sensor can contribute to accuracy, but they are not the primary drivers the way flow rates and seasonal changes are. Routine maintenance is essential for reliable operation, and the type of sensor can play a role, but these factors do not have the same immediate impact on calibration accuracy as flow rates and seasonal variations do. Thus, the option emphasizing flow rates and seasonal changes captures the core issues affecting mass flow calibration accuracy effectively.