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| DEVICE DESCRIPTION 2 |
| SITRANS FX300 | |
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2.2.3 Device description
Figure 2-4: Device description
1Signal converter
2Cable feedthrough grey, standard version
3Pressure sensor, optional
4Shut-off valve, optional
5Measuring sensor
6Centering ring
2.2.4Free air delivery measurement - FAD (optional)
A (air) compressor draws air from the ambient atmosphere, compresses it and delivers it at the required pressure. Since the ambient atmosphere also contains water vapour, what the compressor draws in is a mixture of air and water vapour. Free air delivery measurement is to be understood under this condition. Most manufacturers specify free air delivery only at standard intake conditions. What the user ultimately requires as process air must first be determined before measuring can take place with an accuracy of ±1%.
The vortex flowmeter with the optional FAD function can measure the free air delivery online, humidity and speed compensated, regardless of its function as standard flowmeter. The integrated software evaluates the free air delivery automatically online.
The
The steam tables and compressibility tables are saved as standard. The measuring device is optionally available with a pressure sensor which measures the discharge pressure online, making manual input of the values unnecessary.
06/2009 - SFIDK.PS.050.F2.02 A5E02100423 | www.siemens.com/flow | 13 |
