How to set the range of the field flowmeter in the DCS
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In our facility, the range of the flow meter does not match the range shown on the DCS; the maximum value indicated by the flow meter is 40, while the maximum value displayed on the DCS is 20! A colleague adjusted it earlier; I asked him and he told me, but I still don’t understand. Could someone please provide more specific step-by-step instructions?
The specific steps are as follows: first, find out what brand the flow meter in use is. In simple terms, it comes down to adjusting the zero point and range of the instrument on site. As for how to adjust the instrument itself, you will need to refer to its instruction manual
It is possible to adjust both the DCS and the instruments on-site
Reply to 2# liao: Do I just follow the instructions?
It’s not difficult to adjust the range of the DCS; you can just check the manual
It’s the DCS that needs to be adjusted; adjusting the flow at the site will result in a lower flow rate
The range of the field instruments should be set to match that of the DCS side. As for whether to choose 40 or 20, it depends on the process conditions; for example, if the normal operating flow rate is 20, then it’s obvious that the configuration on the DCS side is incorrect. The measurement range of field instruments is generally specified as technical requirements at the time of purchase; these requirements are provided to the supplier, who sets the instrument’s measurement range before it leaves the factory. As a result, errors on the DCS side are more likely to occur.