Apparatus for determining an electrical characteristic of a...

Details Apparatus for determining an electrical characteristic of a... Apparatus for determining an electrical characteristic of a...

G - Physics

01

N

324/58, 73/61

G01N 13/00 (2006.01) G01N 27/07 (2006.01) G01N 27/60 (2006.01) G01N 33/34 (2006.01)

Patent

CA 1207387

ABSTRACT OF THE DISCLOSURE In the formation of a paper web from stock fed to a Foudrinier wire, the Zeta Potential is an important parameter. A measure of Zeta potential is made by measuring the streaming potential developed in a vertically-arranged cell having a horizontal mesh therein on the underside of which a pad of fibres and fines is formed by pumping stock into the lower part of the cell. Electrodes located in the cell above and below the pad are used to obtain a measure of streaming potential at a given pressure differential across the pad. A pressure transducer is mounted in the lower part of the cell. Corrections are made for temperature and conductivity by sensors in the stock feed path to the cell. A microprocessor control and measuring circuit is disclosed which sequences valves for controlling the flow of stock and flushing fluid to the cell and which measures the relevant parameters.

415040

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