Selecting the right flowmeter, and even more importantly, installing it correctly, are critical for the proper operation of the building automation system (bas). Flowmeters that are not selected correctly or that are not installed correctly can produce large errors and cause a great deal of trouble.
For example, a flowmeter should not be operated much below 10% of its rated maximum flow because most flowmeters are not accurate in that region. A flowmeter should not be operated at much above 80% of its recommended temperature range, or its maximum pressure rating, since doing so may stress the product, and cause premature failure. Sometimes, selecting a flowmeter for a difficult application, such as steam, can be challenging.