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This is an optional feature and will only be available if it has been licensed in the key file.
Acquire must be in Config mode to perform these steps.
Custom calculation fields allow Acquire to be extended by adding new fields that apply simple mathematical formulas to one or more flow computer fields. Once defined, custom fields can be used on the P&ID, data screens, alarms screen and custom reports.
Custom fields can also be used to define enterable fields that record manually entered values that are stored in Acquire. See the ‘Setting up Enterable Fields’ section for more details.
The Custom Fields list will be displayed:
The Custom Fields entry screen will be displayed:
|Full Field Name||This is the name used to identify the custom field.|
|Raise an alarm if value non zero||This checkbox indicates that the custom field is an alarm. When selected, an alarm will be raised when the value of the custom field is 1 or greater.|
|Type||Set the Type field to “Calculation”.|
|Station||This is the station that the field is associated with. This helps in locating the field when setting up the P&ID and detail screens.|
|Stream||This is the stream that the field is associated with. This helps in locating the field when setting up the P&ID and detail screens.|
|Units||These are the units that should be used when displaying the field. Either select a unit from the popup menu or manually enter one.|
|Text Descriptions||Acquire allows fields to have text values to be associated with the numeric values that are returned from the calculation.
eg 1 = “Open”, 2 = “Closed” etc. Numbers do not need to be sequential. Click the ‘Edit’ button to make changes to the text descriptions. See the Adding Text Descriptions to a Field section for more information.
|Formula||This is the formula that is used to calculate the value of the field. See the Entering a Formula section for more information. Click the ‘Edit’ button to make changes to the formula.|
This will save the Custom Field and add it to Custom Field list:
Note: Although the new custom field is displayed on the Custom Fields list it will not be available to the rest of Acquire until the server is restarted.
Acquire will restart and the new custom field(s) will be available in the P&ID, screens, charts and reports.