Change the medium flow rate range on DCS
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If on the DCS screen the liquid flow rate is 8 cubic meters per hour with a range of 0–20, and if the range is changed to 0–30, will the flow rate value also change? Thank you
Changes will definitely occur. Flow rates are generally calculated based on differential pressure; if the range of the primary meter remains unchanged but the range in the DCS is increased, the display value on the DCS screen will also increase. To avoid such changes, one can communicate with the primary meter using a communicator, determine its range, and make the necessary adjustments. In this way, the measured value will remain unchanged, though the accuracy may be slightly reduced.
If the parameter increases, you can calculate it yourself
It is sufficient to ensure that the range of the on-site flowmeter matches that of the DCS.
The DCS will display 8/20*30=12m3/h.
Correct answer: :handshake.
First, check what the range is on the flow meter. Is the flow meter set correctly? It’s sufficient to set the DCS range to match that of the flow meter. No matter what the flow range is set to on the DCS, it will change; however, the output current of the flow meter remains unchanged
It will definitely change, but the value it becomes will be incorrect. The output from the transmitter over there doesn’t change; here, it only changes in a proportional manner.
Of course it changes; it’s a linearly proportional increase. If the range of the flow meter cannot be changed, then in order to obtain accurate readings, the program in the DCS needs to be modified – the value must be divided by 1.5 before it is displayed, so that the readings are correct
As long as the range being changed stays within the maximum range of the primary gauge itself, and the ranges of the primary gauge and the DCS are set to match, then it’s fine. If the ranges of the primary gauge and the DCS do not match, the displayed values will definitely be incorrect
As long as the range being changed stays within the maximum range of the primary gauge itself, and the ranges of the primary gauge and the DCS are set to match, then it’s fine. If the ranges of the primary gauge and the DCS do not match, the displayed values will definitely be incorrect