Can a vortex flow meter with built-in temperature and pressure compensation introduce temperature and pressure data into the DCS?
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I would like to ask the experts in the automation field: The output signal of an integrated vortex flowmeter with built-in temperature and pressure compensation is 4–20 mA + HART. Is it possible to feed the temperature and pressure signals into a DCS for display? How should this be done?
It can be displayed, but only one type can be shown: either flow rate, pressure, or temperature
This is possible for some DCS systems. For example, with Yokogawa’s CENTUM VP DCS and the AAI143-H53 analog input card, the DCS can read a total of 5 parameters from field instruments: 1 AI and 4 HART signals.
Flow meters with bus communication can be chosen; HART is not recommended, as it is generally used with handheld controllers
It is clear that Hart can be used, as well as the Modbus RTU serial port. Recommendation: How to read flow meter real-time data into a host computer using the HART protocol – search on Baidu
It seems that the DCS card can only measure single-loop analog signals; for flow rate signals, the flow meter outputs 4-20 milliamps by default, and this value corresponds to the flow rate. As for temperature and pressure, they are modules built into the gauge head, and the values are displayed on the gauge head through signal conversion. Unless the flow meter has output ports for temperature and pressure, how can the DCS display these values? Typically, temperature and pressure compensation are handled by separate meters, and the PV flow rate of the flowmeter is calculated and displayed through the DCS. Let’s take a look at the flow meter selection in detail
As mentioned above, it’s also possible to use certain special DCS cards to read data just like a handheld operator would. Or a serial port protocol will also work.
Thank you all for your guidance. After checking, it seems that a HART signal converter can be used to display temperature, pressure, and flow rate on the DCS at the same time
Sure, you need to look for the relevant HART protocol; the protocol contains information on communication
Special cards or communication mechanisms are required to separate the signals