Which of the following is NOT a source of equipment errors in float-operated systems?

Float-operated systems are commonly used in various environmental and engineering applications, such as in water level measurement and control. These systems rely on the accurate functioning of a floating device, which can be affected by several factors.

Battery failure is not typically considered a source of equipment errors in float-operated systems because these systems primarily operate on mechanical principles, where the float’s position dictates the output rather than relying on electrical components. While electrical systems could potentially malfunction, the core functionality of a float-operated system is independent of battery power.

In contrast, the buildup of grease on a float, errors in manufacturing tolerances, and changes in temperature and humidity can directly impact how accurately the float responds to changing levels of liquid. Grease buildup can hinder the movement of the float, while manufacturing tolerances can affect how well the float fits within its housing. Additionally, variations in temperature and humidity can influence the density of the liquid being measured, possibly altering the float's buoyancy and leading to inaccurate readings.

Understanding these sources of errors can help in maintaining the reliability of float-operated systems by allowing operators to identify and mitigate potential issues.