Meter properties validation checking

Validation checking in the Properties for Meter is used to make sure that the property values that have been set are within a valid range relative to each other. For example, if when specifying a pressure range for a meter which consists of a High threshold and a Low threshold, it does not make sense for the Low threshold to be greater than the High threshold.

When these mistakes are made in the Properties for Meter, the application flags the items as being problematic by highlighting the associated row header as a color that has been pre-defined in the User Options window.

Hovering the pointer over a value marked as invalid will reveal a tooltip indicating the source of error. In addition, a warning message appears if the row header is double-selected.

The flag indicating that the item is problematic is not intended to prevent you from saving the values entered. If the values are saved in spite of the fact that they contain values that are probably invalid, the edited properties are highlighted as illustrated below.

Saved Invalid Properties (Validation check is not enabled)

As long as the check is not enabled, AVEVA Measurement Advisor allows you to save invalid threshold values. However, when Enable is selected, you are not able to save the change to the validation check, and an error message is provided to you to indicate that the High threshold must be greater than the Low threshold.

Also, when Enable is selected and the properties are saved, the Low threshold cannot be null. A value must be entered. If the properties are saved with a null value, an error message is provided to indicate that you must enter a value.

Saved Invalid Properties (with Validation Check enabled - High Threshold is lower than the Low Threshold)

Saved Invalid Properties (with Validation Check enabled - Low Threshold has a Null Value)