When replacing a rotameter, how should the small ball be handled?

When handling the small ball of a rotameter during replacement, it is essential to hold it with a dry clean cloth to avoid moisture. This is because moisture can affect the accuracy and performance of the rotameter's measurement capabilities. If the ball is wet, it may not float properly or could lead to incorrect readings due to changes in density or potential contaminants that water might carry.

Using a dry cloth ensures that the ball remains clean, dry, and free from contaminants that could interfere with its function. Proper handling preserves the integrity of the rotameter and helps maintain precise measurement in the system, which is crucial for accurate flow rate determinations.

Other approaches, such as rinsing it with water, storing it separately, or even replacing it, do not address the need for maintaining a dry and clean condition during installation. Hence, holding the ball with a dry clean cloth is the most effective method to ensure optimal performance of the rotameter.