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 standard now forms Part 1 of two Parts of BS on electromagnetic flowmeters as follows: The scraper is driven by an external electric motor via fluid pressure seals. 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.
Heating of the electrodes can also be used to remove fat or grease deposits from sewage. It provides outputs which can be in volts, milliamps or pulses per second.
If the field is perpendicular to an electrically-insulated pipe which contains the moving liquid and if the electrical conductivity of the liquid is not too low, a voltage may be measured between two electrodes on the wall of the pipe.
This isoo also aligns with that in ISO 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.
This approach is generally used on oily, greasy and sludge-type coatings. Its application is generally limited only by the requirement that the metered liquid shall be electrically conductive and non-magnetic. Equipotential conductive links usually copper braids should be fitted across both flange joints see Figure 6. This effect has been minimized by the designs of the iiso pieces.
Details and advice can be obtained from the Copyright Manager. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. Verfahren mit magnetisch-induktiven Durchflussmessgeraeten. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March lso, and conflicting national standards shall be withdrawn at the latest by March This International Standard does not specify safety requirements in relation to hazardous environmental usage of the meter, nor does it apply to the measurement of magnetically permeable slurries, liquid metals nor usage in medical applications.
However, it was not until the s that industrial applications became a reality. Describes the principle and main design features of industrial flowmeters in a conduit running full. Care should be taken when handling the primary device; slings around the primary device, or lifting lugs, should be used.
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BS EN ISO – PDF Free Download
Some of the earliest applications were concerned with measuring the flow rate of bloodKolin Copyright Copyright subsists in all BSI publications. Means should be provided for adjusting and isk the adjacent pipework. It is important to us that you purchase the right document.
The coil assembly is either mounted externally or encapsulated within the pipe. Standards Subsctiption may be the perfect solution.
BS EN ISO 6817:1997
Year Book Medical Publishers. A heterogeneous fluid composed of small particles uniformly distributed in a medium can be considered as a homogeneous liquid. 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. Search all products by. It is the constant aim of BSI to improve the quality of our products and services. The coils producing the magnetic field may be energized from the normal single-phase supply, or from some other supply.
This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Locations close to electrical equipment which may interfere with the flow measurement signal, or locations where currents may be induced in the primary device, should be avoided. Although we endeavour to maintain an up-to-date catalogue, on occasion we may not have the latest version of a document, including where it has not yet been provided through an international feed.