BS EN ISO Measurement of conductive liquid flow in closed conduits – Method using electromagnetic flowmeters. BS EN ISO Measurement of conductive liquid flow in closed conduits. Method using electromagnetic flowmeters. standard by British. Home; ISO File Size: 1 file, MB; Same As: BS EN ISO , BS EN ISO Document History. ISO
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This approach is generally used on oily, greasy and sludge-type coatings. This would give rise to circulating currents, and the measured signal would be lessened by an Ohmic drop. Up-to-date lists and oso references concerning such isp standards may be obtained on application to the Central Secretariat or to any CEN member.
Theoretically, a uniform magnetic field can only be achieved by using an infinite magnet. The manufacturer should state the maximum permissible torque. The electromagnetic flowmeter consists of a primary device and one enn more secondary devices. The secondary device processes the signal from the electrodes, typically millivolts.
Revisions British Standards are updated by amendment or revision. The fitting of curves to specific sets of calibration or user data from flow measurement devices is covered in ISO and ISO eb Deposits are removed vs the resultant local cavitation at the electrode.
Covers their installation, operation, performance and calibration. Measurement of fluid flow in closed conduits Section 2. The primary and the secondary devices can be combined in a single assembly. Subscribing members of BSI are kept up to date with standards developments 68817 receive substantial discounts on the purchase price of standards.
Its application is generally limited only by the requirement that the metered liquid shall be electrically conductive and non-magnetic. Customers who bought this product also bought BS EN Thus the velocity and hence the flow-rate of the liquid may be measured. It should be possible to remove the quadrature signal but complications arise when, for example, liquid conductivity is not uniform or earthing difficulties exist.
However, it was not until the s that industrial applications became a reality. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained.
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This usage also aligns bd that in ISO Please first log in with a verified email before subscribing to alerts. At the time of publication, the editions indicated were valid. The scraper is driven by an external electric motor via fluid pressure seals. Please download Chrome or Firefox or view our browser tips.
Lifting by any means that could damage the liner, for dn, hooks in the bore, shall not be used.
BS EN ISO 6817:1997
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Liquid flow, pipe flow, bw measurements, flowmeters, electromagnetic equipments, installation, izo, marking English version Measurement of conductive liquid flow in closed conduits — Method using electromagnetic flowmeters ISO It is essential that account is taken of any other chemicals liable to pass through the meter tube, such as sterilizing agents, cleaners and solvents.
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Means should be provided for adjusting and aligning the adjacent pipework. The resultant rapid gas evolution bw removal of deposits. Your basket is empty. You may delete a document from your Alert Profile at any time.
Find Similar Items This product falls into the following categories. Describes the principle and main design features of industrial flowmeters in a conduit running full. Click to learn more. This International Standard covers flowmeter types in both a. Permissible values should be checked with the manufacturer. Heating of the electrodes can also be used to remove fat or grease deposits from sewage. Typical reference accuracy envelopes are shown in Figure 7.
Users of British Standards should make sure that they possess the latest amendments or editions. The coil assembly is either mounted externally or encapsulated within the pipe.
If, in this case, the mean axial velocity corresponding to the maximum flow-rate is less than that recommended by the manufacturer, a primary device with a smaller bore should be used. In particular, direct solar irradiation shall be avoided. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
Copyright Copyright subsists in all BSI publications. The use of direct current as a means of exciting the magnet has been quickly discarded because of the difficulty of electrochemical and polarization emfs appearing at the electrodes, and for many years excitation by alternating current was the norm.
The choice of liner material depends mainly on the liquid, which can range from slurries or molasses to chemically-aggressive mixtures or molten metals. The combination of the random and systematic errors may therefore be treated as though all were truly random and, according to the ISOthe relative standard deviation of the flow-rate measurement may be taken as the square root of the sum of the squares of the relative standard deviations arising from the various sources.