Emerson Rosemount 3308A Reference Manual page 113

Reference Manual
00809-0100-4308, Rev CA
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
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
A. Threshold Intersection: Surface detected at first intersection with Surface Threshold
B. Peak Center
C. Surface Threshold
To set the Peak Detection Method to Threshold Intersection:
1. Select Service Tools > Echo Tuning > Advanced.
2. Under Peak Detection Method, select Threshold Intersection, and then click Send.
3. Run Verify Level to compensate for any offset error (see
Intersection method. See
Figure 6-12. Thin Oil Layer on Top of Water, Peak Detection Method Set to Threshold Intersection
A. Surface detected at first intersection with Surface Threshold, even when there is an oil peak
B. Actual product surface is ignored
C. Surface Threshold
D. Offset error
Service and Troubleshooting
PRELIMINARY
B
A
"Verify level" on page 74
D
B
A
Service and Troubleshooting
C
Figure 6-12) introduced by the Threshold
for further instructions.
C
August 2017
Figure 6-11. Note
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