Some data from the vortex flow meter is not displayed when transmitted over a distance
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For the company’s vortex flow meters, the control room only displays the instantaneous flow rate; the total cumulative volume, pressure, and temperature are not shown. I’m not sure if something is broken inside the meters
It seems like your explanation is a bit confusing. Is it a vortex flow meter equipped with on-site temperature and pressure compensation, using an accumulator to transmit data to the main controller? If that’s the case, it’s likely that the on-site accumulator has lost power, which is why the accumulated temperature and pressure values are not displayed. You can rule out various possibilities one by one: first check whether the on-site display is working properly; if it shows normal readings, then examine the operating status of the components in the cabinet, and finally check the configuration settings! Following this approach will generally allow you to identify the problem
Mm-hmm, I’ll check it tomorrow
It is also possible that the temperature and pressure only go into the integrator and are not sent to the DCS. Is the temperature and pressure compensation performed through the DCS or on-site? If it’s done via the DCS, it might be a problem with the channels or cables; if it’s done by an integrator, then... isn’t it normal for the DCS not to display anything?
There is no detailed explanation regarding the data transmission method. It’s impossible to determine what the cause is. The signal was there before but suddenly disappeared. It’s still the case that you never noticed it. Generally, signals are transmitted over vortex streets. There will only be an instantaneous flow rate. Of course, those with special requirements can upload other data.
The vortex flow meters produced by ordinary manufacturers provide a flow rate signal that has been adjusted to account for temperature and pressure effects; they do not output temperature or pressure signals. Temperature and pressure data must be obtained from pressure transmitters and thermometers. The cumulative flow rate is calculated by the DCS system based on the instantaneous flow rate
But some are possible; it depends on the communication protocol you use