Calibration of volumetric proving tanks can be done using different methods. For the
calibration of large proving tanks the master meter method can be used as a good
alternative to the volumetric transfer method or the gravimetric method. When the master
meter method is used in most cases a positive displacement meter is used. A better option
is to make use a Coriolis mass flow meter as the master meter. Test data is presented of a
calibration of a proving tank with a nominal volume of 500 L. Small repeatability figures
can be obtained of consecutive calibration runs with a Coriolis mass flow meter. Also the
linearity of the meter factor curve of the Coriolis mass flow meter makes this a better
option for the master meter method.