Reasonability limit check

The Reasonability Limit Check detects when field devices are operating outside the limits that they are expected to report.

This check is performed after the data is loaded into the History tables, and only if the following conditions are met:

• Gas Quality (GQ) or the Meter Run is active.

• The check is enabled.

The following algorithm is used to detect if the field equipment is operating outside the defined limits.

As long the new value falls between the limits, the statement is true. If the new value renders the following statement false in any way, a reasonability limit message is generated:

Lo < Val < Hi

Where:

• Val = Measurement data

• Hi = High limit

• Lo = Low limit

Validation will continue regardless if the outcome is true or false.