BS EN ISO 6817 PDF

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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It is identical with ISO The resultant rapid gas evolution causes removal of deposits.

Methods of evaluating the performance of electromagnetic flow-meters for liquids. Figure 4 — Principle of pulsed d. 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. Other specific designs are also available, for example, a cast steel case with the coils insulated inside the case and liners fitted internally to this again.

In this case, the inlet and outlet straight pipe sections shall be the same size as the flowmeter see 7. 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.

For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. 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.

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Standard BS EN ISO

This standard now forms Part 1 of two Parts of BS on electromagnetic flowmeters as follows: We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover.

The power supply should be taken from a point that is as free as possible from transient voltages. Durchflussmessung von leitfaehigen Fluessigkeiten in geschlossenen Leitungen. Please first log in with a verified email before subscribing to alerts. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.

This method is becoming less commonly used in modern electromagnetic flowmeters. This standard is not included in any packages. Remember me Forgot password? Verfahren mit magnetisch-induktiven Durchflussmessgeraeten. The impedance of the liquid path should ideally be at least two orders of magnitude less than that of the input of the secondary device.

Deposition of electrically conducting layers on the inside surface of the liner may also lead to errors.

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ELECTROMAGNETIC FLOWMETERS

It is current ixo to specify a reference accuracy envelope over a designated flowrate range. If necessary, warning devices should be installed to preserve measurement integrity.

It is incorporated by Royal Sio. The choice of liner material depends mainly on the liquid, which can range from slurries or molasses to chemically-aggressive mixtures or molten metals.

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This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Part 2BS The internal impedance of the primary device obviously depends upon the liquid conductivity, and very large changes in this impedance may produce errors in the output signal.

Royal Danish Academy of Science and Letters. One or more pairs of electrodes, diametrically-opposed, are set into the wall such that the diameter on which b lie, the magnetic field and the flow direction are mutually orthogonal. The electromagnetic flowmeter consists of a primary device and one or more secondary devices.

Theoretically, a uniform magnetic field can only be achieved by using an infinite magnet. The same applies if the offset is in the negative direction.

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