Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Zero offset in electromagnetic flowmeters.

G D Montgomery, A M Scher, L V Corbin

    The American Journal of Physiology
    |July 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Absence of atherosclerosis in human intramyocardial coronary arteries: a neglected phenomenon.

    Atherosclerosis·2000
    Same author

    Studies of the electrical activity of the ventricles and the origin of the QRS complex.

    Acta cardiologica·1995
    Same author

    Validity of the uniform double layer in the solution of the ECG forward problem.

    Journal of electrocardiology·1994
    Same author

    Is rapid rise in vascular conductance at onset of dynamic exercise due to muscle pump?

    The American journal of physiology·1993
    Same author

    Dependence of cardiac filling pressure on cardiac output during rest and dynamic exercise in dogs.

    The American journal of physiology·1993
    Same author

    Recovery of arterial pressure control after partial baroreceptor denervation in awake rabbits.

    The American journal of physiology·1992
    Same journal

    Blood coagulation in fish.

    The American journal of physiology·2011
    Same journal

    Renal tubular reabsorption, metabolic utilization and isomeric fractionation of lactic acid in the dog.

    The American journal of physiology·2010
    Same journal

    The inactivation of placental toxin by human serum.

    The American journal of physiology·2010
    Same journal

    Adrenal function following ovariectomy in the rat.

    The American journal of physiology·2010
    Same journal

    Capillary permeability; perfusion of frog and guinea pig hind limbs.

    The American journal of physiology·2010
    Same journal

    Evaluation of protective measures against sunburn.

    The American journal of physiology·2010
    See all related articles

    Zero offset in electromagnetic flowmeters can be reduced by improving amplifier design to correct voltage transient distortion and using shielded coils to minimize resistive leakage. These corrections significantly decrease zero offset errors.

    Area of Science:

    • Electromagnetic flow measurement
    • Instrumentation and measurement science

    Background:

    • Electromagnetic square-wave flowmeters theoretically allow zero flow determination by disabling the magnet drive.
    • However, practical applications reveal significant zero offset errors in commercial flowmeters.

    Purpose of the Study:

    • To identify and address the primary sources of zero offset in electromagnetic flowmeters.
    • To propose and evaluate methods for correcting these offset issues.

    Main Methods:

    • Investigated voltage transient distortion in input amplifiers during magnet drive polarity switching.
    • Examined resistive leakage between drive voltage and input electrodes in conducting fluids.
    • Implemented improved amplifier designs and utilized shielded coils with isolated magnet drives.

    Related Experiment Videos

    Main Results:

    • Improved amplifier design effectively corrected voltage transient distortion, a major source of zero offset.
    • Shielded coils and isolated magnet drives minimized resistive leakage, another key offset contributor.
    • Combined corrections substantially reduced overall zero offset in the flowmeters.
    • Electrode polarization was not identified as a significant cause of zero offset.

    Conclusions:

    • Zero offset in electromagnetic flowmeters is primarily caused by amplifier distortion of voltage transients and resistive leakage.
    • Optimized amplifier design and shielded coil configurations are effective in mitigating these zero offset sources.
    • The proposed improvements offer a practical solution for enhancing the accuracy of electromagnetic flowmeters.