Emerson 3308A Rosemount 3308 Series, Reference Manual

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Reference Manual
00809-0100-4308, Rev BA
Section 6: Service and Troubleshooting
December 2014
Service and Troubleshooting
6.4.6 Using the Simulation Mode
This function can be used to simulate measurements and alerts.
1. From the Home Screen, go to Service Tools > Simulate .
2. Click desired variable and follow the on-screen instructions.
6.5 Application challenges
6.5.1 Resolving thin oil layers
Thin oil layer on top of water might cause jumpy surface readings. Because of the thin oil layer,
the transmitter varies between detecting oil and water. Sometimes the oil layer gets too thin to
be detected. See
Figure 6-10 .
Figure 6-10. Thin Oil Layer on Top of Water, Peak Detection Method Set to Peak Center
The surface readings in such applications will be stabilized by setting the Peak Detection
Method to Threshold Intersection. The point used for level measurement is then changed, see
Figure 6-11 . Note that this configuration should only be performed by advanced users as it
could cause issues if configured incorrectly.
Figure 6-11. The Different Peak Detection Methods
Water peak
Oil peak detected as
surface Too thin oil layer,
no peak
Water peak detected as the surface
Surface Threshold
Threshold Intersection: Surface detected at first
intersection with Surface Threshold
Peak Center
Surface Threshold