Mass flow meter
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What is the reason for the low reading on a Coriolis mass flowmeter?
Your description is too brief – is it the instantaneous value or the cumulative amount that is too low? Compared to what? What fluid does a flow meter measure? What are the installation conditions for the flow meter? ……
Has the flow meter not been calibrated? Suggest calibration
Explain the reasons for determining that the indication is too low.
Based on the amount of material that enters, it is possible to estimate the quantity of product produced. The readings from the flow meter match the amounts we have calculated; in fact, over the past few days, the output has been about 2 tons less per hour.
The instantaneous flow rate is low, and the cumulative flow rate also appears to be low when observed. The medium is LNG; there are no issues with installation – everything has been accurate before, and the problems only started appearing recently.
Coriolis mass flow meters generally have a two-tube design. If the medium contains components that can cause deposition or blockage, or if the installation is improper resulting in subtle flow deviations, the measured flow rate will be lower, especially when one of the tubes is blocked or has poor flow conditions.
Connect 2 mass flow meters in series; it doesn’t matter if it costs an extra 50,000, just observe the difference
To determine the deviation of the flow meter’s indications based on production volume, the following aspects should be considered: 1. Check all settings and wiring of the flow meter (including the grounding status) to see if there are any changes； 2. Check whether there have been any changes in the manufacturing process. I have personally encountered situations where changes in the origin of raw materials led to changes in the relationship between output and flow meter readings ； 3. If no issues are detected through the above checks, it is necessary to calibrate the flow meter. .