Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question from 2020-10-11
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Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question No. 2020-10-11: Discussion question: 262. Please explain whether your unit uses multi-parameter transmitters or three separate instruments for temperature and pressure compensation in flow measurement If multiple parameters are involved, what manufacturer and what brand are used? Are there any problems with its use?
Over the years, Emerson has introduced multi-variable flowmeters that can measure pressure, flow rate, and temperature at the same time, but they are relatively expensive. Three-parameter flowmeters are still in use; they tend to have more faults, but there are no major issues with their measurement accuracy (Rosemount or EJA differential transmitters).
Transmitters, integrators, and the like are all separate products; I remember there are brands like Hongrun and Chuanyi...
Single table, EJA, temperature arbitrary
Over the years, Emerson has introduced multi-variable flowmeters that can measure pressure, flow rate, and temperature at the same time, but they are relatively expensive. Three-parameter flowmeters are still in use; they tend to have more faults, but there are no major issues with their measurement accuracy (Rosemount or EJA differential transmitters).
Multi-parameter temperature compensation is used, from Rosemount; no problems have occurred
Multi-parameter transmitters are available from Rosemount, Yokogawa, and Fuji
Multi-parameter compensation. Use an Emerson flowmeter.
Try to use just one unit if possible; the more units there are, the more nodes there will be, and thus the more potential failure points. We use Zhejiang Diyuan
Not bad; it’s been in use for 2 years, and the current output remains stable even when there are malfunctions