What is the most probable cause for a meter to over-register?

What is the most probable cause for a meter to over-register?

• A. Air in the line
• B. Dirt in the line
• C. Excessive flow
• D. Excessive pressure

Answer: (A)

Over-registration of a meter commonly occurs due to air in the line. When air gets trapped within the fluid system, it can affect the accuracy of the meter readings. This happens because the meter is designed to measure liquid flow, and the presence of air creates discrepancies in the flow profile. As the air bubbles pass through the meter, they can be wrongly interpreted as liquid flow, leading to the meter registering a higher volume than is actually passing through the system. In contrast, other factors such as dirt in the line, excessive flow, or excessive pressure can contribute to inaccurate readings, but not specifically lead to over-registration. Dirt can cause blockages or affect flow measurements but generally leads to under-registration or erratic readings rather than consistently over-registering. Excessive flow might lead to turbulence, and excessive pressure could lead to system stress or leaks, both of which can also affect the performance of the meter but won't typically cause it to consistently show higher readings. Thus, air in the line stands out as the most probable cause of over-registration.

Over-registration of a meter commonly occurs due to air in the line. When air gets trapped within the fluid system, it can affect the accuracy of the meter readings. This happens because the meter is designed to measure liquid flow, and the presence of air creates discrepancies in the flow profile. As the air bubbles pass through the meter, they can be wrongly interpreted as liquid flow, leading to the meter registering a higher volume than is actually passing through the system.

In contrast, other factors such as dirt in the line, excessive flow, or excessive pressure can contribute to inaccurate readings, but not specifically lead to over-registration. Dirt can cause blockages or affect flow measurements but generally leads to under-registration or erratic readings rather than consistently over-registering. Excessive flow might lead to turbulence, and excessive pressure could lead to system stress or leaks, both of which can also affect the performance of the meter but won't typically cause it to consistently show higher readings. Thus, air in the line stands out as the most probable cause of over-registration.