Does the orifice plate calculate the differential pressure under standard conditions, and does the transmitter display the flow rate under standard conditions?
Thread Content
According to the instrument specifications, the flow measurement range is 0–50,000 Nm3/h; the differential pressure calculated using the orifice plate is 0–5 kPa. The transmitter has been calibrated with a square root function, and under these conditions it measures a differential pressure of 1.25 kPa corresponding to a flow rate of 25,000 Nm3/h. Is this flow rate the value at standard conditions or at the actual operating conditions?
Unit: Nm3/h, which is standard cubic meters
Thank you! If it is a gauge pressure, is temperature and pressure compensation still required, and which compensation formula should be used?
Thank you! If it is a gauge pressure, is temperature and pressure compensation still required, and which compensation formula should be used?
Accurate measurement requires temperature and pressure compensation; the compensation formula can be found in the orifice plate design specifications, as well as online, where there are many resources available on the topic.
Operating conditions. . . . . If standard conditions are used, temperature and pressure compensation is required