When calibrating air velocity meters, it is crucial to know the air flow density, as the meter reading must often be applied to the actual conditions in air flow, which are ensured during the calibration. In this paper we present an appropriate model for determining the density of
moist air and we also present the measuring system for all the necessary parameters (temperature, pressure and relative humidity). We also performed an analysis of the
measurement capability of individual meters. We have created a control program that enables the acquisition of data from the LDA measuring system and the simultaneous recording of air flow conditions and the calculation of its density.
|
