The volume of streaming liquids is usually measured with flow meters that are calibrated with volumetric measuring instruments.
The capacity of a volumetric measuring instrument is determined by weighing and density measurement. Flow meters for all kinds of mineral oils with a maximum flow rate of 1500 l/min can be tested against BEV’s test rig.
Verification of Measuring Systems for Liquids other than Water
Measuring systems for continuous and dynamic measurement of liquids other than water are liable to verification in Austria. Such measuring systems are intricate devices assembled from several components, basically a flow meter and its auxiliary devices (i.e. pumps, filters, gas elimination devices, pressure valves, and stop valves) ensuring the proper functioning of the meter.
The first verification of a new instrument is called initial verification. The verification of an unverified instrument is a new verification. Verification during the validity period is a reverification.
The Measuring Instruments Directive (MID) has been applied in all EU Member States since October 30, 2006 regulating the first placing on the market of measuring instruments liable to verification.
These measuring instruments have to undergo a conformity assessment procedure.
Measuring systems for liquids other than water are included in the MID.
Modules B+D, B+F, G or H1 are applicable to measuring systems for the continuous and dynamic measurement of liquids other than water.
See also Measurement Instruments Directive MI-005.