Depending on the purpose of the related task. If you are only interested in knowing whether the meter is functioning as per a set tolerance for display, output, and volumetric totalization – then a calibration is fine. Ensure all controls are tight and the data used for calibration is unquestioned.
However, if you are using other peripherals such as SCADA for volumetric accumulation, reporting, or billing – then an audit should be conducted as well.