The calibration of mass flow meters and controllers (MFC) is crucial for their precise use. Some manufacturers recommend calibrating MFCs at the maximum pressure indicated on the device. However, this approach is not always beneficial for users who do not operate the devices at the corresponding maximum pressure.

A high-quality MFC typically measures mass, which, as a physical unit, is known to be independent of pressure. Even when certain MFCs actually perform volumetric measurements and convert them to mass flow through integrated pressure and temperature compensation, this should ensure independence from pressure. In theory, calibration should be possible at any pressure. However, this is not the case with all manufacturers.

If the compensation is insufficient, calibration is most effective under the real pressure conditions of the application where the customer operates the device. The maximum pressure values printed on the device can be equally unsuitable if they do not reflect the actual application.

Therefore, it is important for customers to specify their pressure range when requesting a calibration for a mass flow meter.

Qualified calibration laboratories inquire about the customer’s actual operating conditions to tailor the calibration optimally and achieve the best measurement accuracy.

Take advantage of our expert advice on calibrating mass flow meters – we are always available to help you find the best solution for your needs.

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