How Measurement Values Are Determined

The final value associated with a Thickness Measurement is stored in the Measurement Value field. Values are not, however, entered directly into the Measurement Value field itself. Instead, values are entered into the Readings field.

To determine the Measurement Value for a Thickness Measurement, one or more readings will be collected at a given TML. To account for the margin of error associated with user error, equipment malfunction, or environmental conditions, you may wish to collect multiple readings for each Thickness Measurement. The number of readings that you may take for a measurement will depend upon various factors, including your company's policies, the characteristics of the TML, and the method that you are using to collect the readings. The number of readings that you must take for each measurement is determined by the value specified in the Number of Readings field in the TML to which the Thickness Measurement is linked.

After you have determined how many readings you must take for a specific measurement and have collected those readings, you will add a Thickness Measurement and log the reading values in the Readings box. A calculation will be performed against the values in the Readings box, based on the . Then, the Uncorrected Measurement field will be populated with the result of that calculation. Finally, the Measurement Value field will be populated with the value in the Uncorrected Measurement field. The Measurement Value field will then contain a value representing the final, corrected thickness measurement value.

Note: The Uncorrected Measurement field is meant to serve as an intermediate storage location between the Readings and Measurement Value fields. In Thickness Monitoring, the Measurement Value field is simply populated with the value in the Uncorrected Measurement field. You can create custom rules for the Measurement Value field so that the Uncorrected Measurement value is adjusted based upon additional factors and the result of that calculation becomes the value in the Measurement Value field.