Normal PSId value is within which range?

Normal PSId value is within which range?

• A. 0-9.8
• B. 0-10.2
• C. 0-10.5
• D. 0-11.0

Answer: (B)

PSId is a differential pressure reading: it shows the pressure difference across a component and rises as that difference increases. In normal operation, there is no differential when the system is unpressurized (zero) and the reading increases with the actual pressure difference until the design limit is reached. The specification for this system sets that normal operating band from 0 up to 10.2 psi. So a normal PSId value should lie within 0 to 10.2 psi. If the reading goes above about 10.2 psi, it indicates an abnormal condition or sensor fault that warrants investigation. Values below zero would indicate a reverse or erroneous reading, which is also outside normal operation.

PSId is a differential pressure reading: it shows the pressure difference across a component and rises as that difference increases. In normal operation, there is no differential when the system is unpressurized (zero) and the reading increases with the actual pressure difference until the design limit is reached. The specification for this system sets that normal operating band from 0 up to 10.2 psi. So a normal PSId value should lie within 0 to 10.2 psi. If the reading goes above about 10.2 psi, it indicates an abnormal condition or sensor fault that warrants investigation. Values below zero would indicate a reverse or erroneous reading, which is also outside normal operation.