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161
Reference Manual
00809-0100-4530, Rev DD
May 2016
Figure 7-9. Echo Curve Plot Indicating that the Amplitude Threshold for the Interface Peak is Too High
By adjusting the Interface Threshold, the peak at the interface between the upper and lower
products is detected as illustrated in
:
Figure 7-10. After Changing the Amplitude Threshold the Transmitter Detects the Interface
7.6
Disturbance echo handling
When the Basic Configuration is done, the transmitter may need a fine-tuning to handle
disturbing objects in the tank. The Amplitude Threshold Curve (ATC) function can be used
for disturbance echo handling with the Rosemount 5300 Series Transmitter.
7.6.1
Amplitude threshold curve
, the ATC can be designed to filter out single disturbing echoes by
adapting the curve around the corresponding amplitude peak. It is important in this case
3.0
5.0
The Interface Threshold is above the
interface peak
Amplitude
, mV
Distance, m
Interface Threshold
Surface Threshold
Reference Threshold
3.0
5.0
The Interface Threshold is adjusted
below the peak to allow the interface
peak to be detected
Amplitude
, mV
Distance, m
Interface Threshold
Surface Threshold
Reference Threshold