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Title: In Vito calibrated Venturi Tube for precise Air Mass Flow Measurement
Author: Rolf Groe-Laxzen Daniel Grates Dr.Ing. P. Jeschke
Source: 2018 International Symposium on Fluid Flow Measurement
Year Published: 2018
Abstract: Industrial praxis needs flow measurement for determining the plant operation status and of course production. In the past few years the idea of condition based maintenance is becoming increasingly widespread and here a precise status determination and especially performance change assessment is vital for planning maintenance activities with sufficient time in advance. Boundary conditions needed for precise absolute flow measurement are often in contrast to the industrial reality with lack of space for sufficient inlet and exit piping length and the demand for low pressure losses during operation and low costs for measurement devices. In case of pipe diameter equal or bigger 250mm (10) fulfilling the demands according the standard 1 DIN EN ISO 5167-1, 1995 for undisturbed pipe-length in front of the measuring device becomes a challenge which is even harder for the current version 2 DIN EN ISO 5167-4, 2003 which explicitly requests for an undisturbed exit pipe length.

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