Xylem TitroLine 7800 Mode D'emploi page 214

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4.6.4.3 Syntax check
The syntax check is performed each time the formula is saved by the formula editor.
It is checked,

whether the number of opening brackets is equal to that of the closing ones.

whether the entered variables and calculation operations are allowed.
If an error occurs in the syntax, an error message is displayed (Fig. 141 and Fig. 142).
Fig. 141
Fig. 142