Source: http://www.google.com/patents/US7750642?dq=6,208,537
Timestamp: 2017-09-22 03:23:29
Document Index: 690529073

Matched Legal Cases: ['art 2', 'art 1', 'art 2', 'art 1', 'art 2', 'Application No. 07839039']

Patent US7750642 - Magnetic flowmeter with verification - Google Patents
A magnetic flowmeter is provided including a magnetic flowtube arranged to receive a flow of process fluid. The magnetic flowtube includes a drive coil and at least one sense electrode. Measurement circuitry is coupled to the flowtube and is configured to provide a drive signal to the drive coil and...http://www.google.com/patents/US7750642?utm_source=gb-gplus-sharePatent US7750642 - Magnetic flowmeter with verification
Publication number US7750642 B2
Application number US 11/863,566
Also published as CN101517377A, CN101517377B, EP2074385A2, EP2074385B1, US20080078252, WO2008042290A2, WO2008042290A3
Publication number 11863566, 863566, US 7750642 B2, US 7750642B2, US-B2-7750642, US7750642 B2, US7750642B2
Inventors William F. Graber, Scot R. Foss, Robert K. Schulz
Patent Citations (410), Non-Patent Citations (132), Referenced by (3), Classifications (7), Legal Events (3)
US 7750642 B2
15. The method of claim 10 including measuring a current level of current of the drive signal applied to the drive coil by the measurement circuitry.
I ( t ) = I ( ∞ ) - ( I ( ∞ ) - I ( 0 ) ) * e - t / L R EQ . 1
The electrode resistance may be measured and, for example, a common mode signal applied to the electrodes 30 and 32 and the attenuation of the signal used to determine resistance. An analog to digital converter may be used to employ to measure the current output on process control loop 162. Coil current may be measured by including a sense resistor in sensor 232 which is placed in series with the coils 26 and measuring the resultant voltage drop. Other tests may be performed on other components and the invention is not limited to those set forth herein.
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DE102013112373A1 Nov 11, 2013 May 13, 2015 Endress + Hauser Flowtec Ag Verfahren zum Betrieb einer magnetisch-induktiven Messeinrichtung
U.S. Classification 324/439, 73/861.12
Cooperative Classification G01F25/0007, G01F1/60
European Classification G01F1/60, G01F25/00A
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GRABER, WILLIAM F.;FOSS, SCOT R.;SCHULZ, ROBERT K.;REEL/FRAME:019894/0895