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Now if you have thermal mass, warmup times in your heat source, not to mention transport delays of the fluid in the pipe, sensor response time, what ever you do, sort it out first. Fast controller response is meaningless, if the process response time is 20 minutes...

You can use crushed ice or boiling water for a quick check, your lab may have other sources of calibration

Because of the long transport delay or lag times, the controller settings require gradual changes as rapid changes in some system result in over corrections and thermal instabilities.

Weigh-belt feeders are commonly used. They are still used

Most orifice style measurements are useful for higher fluid velocities, your flow is well below 1 meter/sec in 3 in piping. You might have to consider an alternate flow element and 1 inch piping.

what is the surface temperatures close to the bearing using hand held monitor?

Okay, you've provided Fluid Liquid Stated Flow 3200 Kg/hr (suggest small piping not normally measured with orifices) Press 59-64 Barg Temp 40-90 DegC Trans Span 0-6 mBar (Please Explain the discrepancy with you...

Refer to element.49415 for your responses

Hello 123, what's the pipe i.d., upstream distance to you flow conditioner, nominal fluid(liquid,air,steam), pressure, temperature, etc. Meter bore, if you have it.

you can consider using a common level measurement, but each controlled device will need different controller settings (gain, response time, and output limits, alarms...)

are you asking if what appears to be valve sizing software can be used for restrictions orifices in your piping, connected one after the other?

at the connection head (disconnected from the DCS wiring) what is the resistance to the thermowell?

sounds like replacement is your cheapest option.

Take extra precautions powering up devices that have been out of service, especially power transformers. Not all insulation ages well, and you have to gradually condition it even as a safety check under reduced voltages and load, to be safe.

definitely dealing with a field wiring issue.

mmH2O is a convenient unit for flow measurement in operating plants, inH2O is also used, and related to liquid level measurement if you know the fluid density

just leave it plugged in

Please show Bernoulli's equation to which you refer.

well, given your data, you solve for K, Q, or P. At least to of the parameters must be specified, take your pick.

k is a coefficient that is determined from flow tests, either for valves, flow meters, or various restrictions, take a look at a engineering hand book, there are many