emerson-300510en-users-manual

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Rosemount Raptor System Configuration Manual 300510EN, Rev AA December 2010 11. For still pipe applications select the Enable still pipe/Bridle Measurements check box and enter the Pipe Inner Diameter. See the Rosemount 5400 Reference Manual (Document No. 00809-0100-4026) for more information on Hold Off Distance and other transmitter parameters. 12. Click the Apply button to store the configuration. 13. Select the Geometry tab. 14. Enter the tank distance parameters. a. Tank Reference Height (R). The Tank Reference height (R) is defined as the distance from the Tank Reference Point to the Zero Level. b. Reference Distance (G). The Reference Distance (G) is the distance between the Tank Reference Point and the Gauge Reference Point, which is located at the top surface of the nozzle flange on which the gauge is mounted. 5-82 Section 5. Installing a Raptor Level Gauging System
System Configuration Manual 300510EN, Rev AA December 2010 Rosemount Raptor c. Minimum Level Distance (C). The Minimum Level Distance (C) is defined as the distance between the Zero Level (Dipping Datum Point) and the minimum level for the product surface (tank bottom). By specifying a C-distance, the measuring range can be extended to the bottom of the tank. C>0: the transmitter presents negative level values when the product surface is below the Zero Level. You can use the Show negative level values as zero check box to present product levels below the Zero Level (Datum plate) as equal to zero. C=0: measurements below the Zero Level will not be approved, i.e. the transmitter will report “invalid level” if the product level is below the Datum Plate. 15. Enter the Calibration Distance. Use this variable to adjust the tank height so that measured product levels match hand dipped levels. Normally a minor adjustment is necessary when the transmitter is installed. For example, a minor deviation between the actual tank height and the value stored in the transmitter database may occur if tank dimensions according to drawings are not quite up to date with actual dimensions. 16. Select the Show negative level as zero check box to show negative product levels as zero. 17. Click the Apply button to store the configuration, or click the OK button to store the configuration and close the window. See the Rosemount 5400 Reference Manual (Document No. 00809-0100-4026) for more information on the different tank geometry parameters. Section 5. Installing a Raptor Level Gauging System 5-83
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