How much volume meter scale of error

Abstract: the error of volumetric flowmeter scale exist how information is produced by excellent flow meter, flow meter manufacturer to offer you the quotation. For any value of a flow measurement, must include two parts: one is the flow measurement value itself; So, to any kind of flowmeter, must understand its error characteristics. The so-called. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a displacement meter scale details how the error of the article. For any value of a flow measurement, must include two parts: one is the flow measurement value itself; So, to any kind of flowmeter, must understand its error characteristics. So-called error characteristics, value is the error of the meter and the relationship between the flow measurements. A: V for through the flow fluid volume true value; I indicating value of flowmeter, the error values can be expressed as E = E ( 2-5) The relation between fluid indicating value of the volume V and I ( 2-3) Substitution, available: E = 1 - ( 2-6) At small flow rate, error values sharply toward the negative direction; Suppose in unit time of fluid leakage flow in g; By the flow meter for qv; Through the flowmeter the total fluid volume V; This strain V can be represented as * V = g ( 2-7) So, when there is leakage flow, the rotor out N measurement space fluid volume, and practical through the flow fluid volume V = Nv + V ( 2-8) Type 2-2, 2-7 generations into type 2-8, available: V = V + g ( 2-9) Type ( 2-9) Can be organized into: V = ( 2-10) Will type ( 2-10) In error definition type ( 2-5) , available: E = 1 - ( 2-11) Analysis of the type 2 & ndash; If assumes that the volume meter of leakage flow rate g is a constant value, can use type ( 2 - 11) When the traffic is very small, in extreme cases, qr = g, the type, 2 - 11) With the increase of flow rate qv, type ( 2 - 11) Numerical increase gradually, in parentheses in the error value E also gradually to increase positive direction. When traffic continued to increase, to g seem very small in comparison with qv, namely g/qv is very close to zero, type ( 2 - 11) Into a type ( 2-6) Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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