Emerson Rosemount 2410 - How to Adjust the SIL Amplitude Threshold

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Safety Manual
00809-0200-5100, Rev GB
Installation and Configuration
February 2017
Installation and Configuration
4.2.8 How to adjust the SIL Amplitude Threshold
If the SIL Surface Distance deviates significantly from the distance to the actual product surface,
the gauge may have locked on a disturbing object. Then you will have to filter out the disturbing
echo by adjusting the SIL Amplitude Threshold as described below.
1. Ensure that the Change Safety Alarm Parameters window is open.
2. Note the SIL Surface Amplitude. In case the 5900 has locked on a disturbing object, the
amplitude of the disturbing echo is presented as the SIL Surface Amplitude since the
gauge presents the disturbing object as the product surface.
3. Set the SIL Amplitude Threshold to 10% above the SIL Surface Amplitude and click the
Apply button.
In Dry-run applications you start by setting the SIL Amplitude Threshold to 2000 mV.
See
Appendix G: Dry-run Configuration for more information.
4. Check the updated SIL Surface Distance to verify that the 5900 has found the actual
product surface. If the surface was not found increase the SIL Amplitude Threshold again.
If needed, repeat this procedure until the level gauge finds the actual product surface.
Note! The SIL Block Update symbol (see the Measurement Information pane) alternates
between horizontal and vertical position to indicate that TankMaster reads
measurement data from the 5900.