Patent ID: 6158271
Filing Date: 2000-12-12
Classification: G01N

Abstract:
In a viscometer having at least two capillaries in a parallel fluid circuit arrangement and at least two presssure transducers measuring pressure drop across said at least two capillaries as a fluid flow passes through said viscometer, each transducer having different non-linear response to flow changes and further each transducer having a different dynamic response to fast flow changes, a method of enhancing viscometer output so that it is independent of high frequency flow components and high frequency flow transients or disturbances across said two capillaries without affecting the dynamic response of said viscometer, comprising the steps of:(a) linearizing with respect to flow each of said at least two pressure transducer non-linear responses to establish corresponding linearized pressure signals, having a linear relationship to flow changes;(b) equalizing each of said linearized pressure signals to establish corresponding equalized pressure signals, having a same dynamic relationship to flow changes;(c) utilizing said equalized pressure signals to compute viscometer output, which is independent of high frequency flow components and flow transients.