Prerequisite

• Access to the Configuration > Acceptability criterion (MA034) menu.

Introduction

Acceptability criteria are essential parameters that determine whether an asset is in a suitable condition for use or whether it needs to be adjusted, repaired, or discarded. These criteria are defined by value ranges that indicate the conformity of the asset.

Sources of acceptability criteria

Acceptability criteria can be obtained from the following sources:

• National or international standards: criteria established by regulatory organizations that provide quality and safety standards for different types of assets.
• Manufacturer specifications: when there are no applicable standards, the specifications provided by the asset's manufacturer, available in brochures, catalogs, or operation and calibration manuals, can be used to define the acceptability criteria.

This feature provides an objective basis for deciding the condition of the asset, preventing the use of equipment that does not meet the required standards and that could cause significant failure.

Configuring acceptability criteria

1. Access the Configuration > Acceptability criterion (MA034) menu.

2. Click on the toolbar button.

3. On the screen that will open, enter an ID # and a name for the acceptability criterion.

4. In the Equation field, click on the button and enter the equation that will define the acceptability criterion.

5. In the Acceptable value field, click on the button and enter the equation through which the variation in the value of the calibration table row will be obtained.

6. In the Notation field, select the notation to be used by the criterion:

• Absolute: the value will be the result of the equation.
• % full scale: the value will be the error in relation to the scale of the asset. For that, the result of the equation will be divided by the full scale value (provided in the calibration table) multiplied by 100.
• % nominal value: the value will be the error in relation to the CTV (Conventional True Value) of the calibrated point. For that, the result of the equation will be divided by the nominal value of the asset multiplied by 100.

7. Check the Apply notation to acceptable value option so that the notation selected in the previous step is also applied to the acceptable value. Otherwise, the notation will only be applied to the result of the equation.

8. After filling in the fields, click on the button.

Conclusion

Once saved, the acceptability criterion will be ready for use in objective calibration tables.

With well-defined acceptability criteria, organizations can ensure that their assets are always in optimal operating conditions, aligned with relevant standards and specifications, thus maintaining process safety and efficiency.