The density and flow rate of the Krohne mass flow meter do not match
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The new mass flow meter (KROHNE) purchased by our factory for measuring liquid carbon dioxide – with a density of 1029.9 kg/h at -20°C – was installed yesterday. It was put into use today, and it was found that the density was on the low side (1024.4 kg/h at -19.5°C), while the flow rate was 8 t/h. After adjusting the density to 1029.9 kg/h at -20°C, the flow rate remained at 8 t/h. I would like to ask whether changes in density have no effect on the flow rate Also, is it correct that the density adjusted statically differs from the density adjusted dynamically?
Most mass flow meters operate on the Coriolis force principle, and they directly output the mass flow rate； It is independent of the density of the medium being measured.
The mass flow meter measures mass flow, density, and temperature separately, and derives the volume flow. Therefore, changes in mass flow rate are independent of changes in density. When using a mass flow meter for the first time, it should be allowed to stand with the measuring medium filling the pipe for 10 minutes before zeroing it once. It is normal for the density adjusted statically to differ from that adjusted dynamically; it is not recommended to adjust the density dynamically.
The density correction factor and temperature coefficient still have an impact on flow measurement