Emerson Exchange 365

Turbine meter used to measure naphtha is calibrated with Coriolis meter

What is the uncertainty level if I use a Master Meter (Coriolis) calibrated with water and I use this Master Meter to calibrate a turbine meter that  measures light hydrocarbon? The Master Meter was calibrated to measure volumen

Erik24

• 12 Jul 2016 9:27 PM
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1 Reply

• Sudhir Jain

  

  • 8 Aug 2016 6:24 PM

  I may not be telling something new but I will say anyway. When you calibrate master meter with water and use mass as the measurement both for meter and calibration scale, mass meter is accurate since it takes density in to account. When you shift the same mass meter as master meter for inline turbine meter on Naptha, mass meter still gives you accurate measure of mass and volume (since it measures density as well). Uncertainty is the function of lot of parameters and I may not be able to define here. The above may give you good idea. My experience of this type of measurement is, when you calibrate with water the pressure may be normal water pressure (what ever the line pressure). When you go on Naptha, if the process pressure is very high, above certain size of coriolis it starts having pressure effect. Different manufacturer has way to compensate it. One simple way is to have manual pressure input in flow transmitter or bring pressure transmitter input into flow transmitter.

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