Instrument issue (newbie seeking help)
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The signal output by a differential pressure transmitter is sent to two DCS systems via a distributor, but why might the readings at these two systems differ? How to solve it?
It might be due to differences in the output from the distributor or issues with the DCS settings; standard instruments can be used to calibrate the readings from the distributor and those displayed by the DCS.
Are the currents in the two paths the same? It’s normal for the two outputs of a signal separator not to be exactly the same, right?
1. The signal distributor has errors in conversion accuracy; the two signals output are exactly equal in quantity, and it is not possible to create a difference between them. 2. The signal receivers also have errors in conversion accuracy; when the two acquired values are exactly equal, it is impossible to detect any difference. 3. In summary, industrial-grade components with standard precision are used; if the difference between the readings from the two channels is within 2% of the full scale, there’s no need to worry about it.
I know it’s impossible for them to be exactly the same, but the difference is quite large; the traffic volume differs by almost 10,000, which is why it’s necessary to identify the problem
The difference is quite large, which is why it needs to be resolved
The difference is quite large, which is why it needs to be resolved
The current difference is quite large; it’s a problem with the settings of the distributor
Try a different signal distributor; if that doesn’t work, measure the current to check for any issues with the wiring, or there may be a problem with the card slot