FlowLine EchoBeam LR80 Series Manual page 59

Advanced Configuration
SETTINGS
Settings has 4 categories (Range Adjust, HART, Level Variables and Signal Properties)
Write to Unit is used to save any changes to the sensor. Any changes made are not saved into EchoBeam
until Write to Unit is pressed.
MN310255 Rev 10
SIGNAL PROPERTIES
Echo Threshold (dB)
•
o Echo Threshold and Envelope Level are both tied to the Envelope.
o Echo Threshold is the difference the return signal must exceed above
the Envelope so that the return signal can be considered a valid level
(liquid or solids).
o Echo Threshold is in units of dB.
o When the return signal is weak, decreasing the Echo Threshold will
help to identify the signal.
Envelope Level (dB)
•
o Echo Threshold and Envelope Level are both tied to the Envelope.
o Envelope Level is the difference between the EchoCurve and the
actual Envelop and it adjusts with the shape of the EchoCurve.
o Envelope Level is in units of dB.
o When the return signal is competing with other signals, increasing the
Envelope level will help to filter out the extra signals.
Damping Time (sec)
•
o This function sets the sampling rate for which the sensor updates the
current output.
o The value is entered in seconds with a default of 60 seconds.
Decreasing the value will make the output more responsive to

level changes.
o Increasing the value will make the output less responsive to level
changes.
Section Eight
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