Honeywell SLG 700 Option Manual page 161

6.6.2.8 Attenuation
This menu deal with Attenuation configuration of Vapor, Upper product, Lower product.
Lower Prod. Attenuation
Upper Prod. Attenuation
Vapor Attenuation
Linear Attenuation Model
The gain (amplitude) of the radar reflection is exponentially decayed based on the linear
attenuation coefficient. This accounts for radar pulse energy dissipation to the vapor and media
surrounding the probe and is a function of the distance travelled. This is modeled as:��
−����
( 0 ) ∙ ��
��
.
��������������
Where:
x = the distance from the reference plane
α = the linear attenuation coefficient
The linear attenuation of the gain is plotted in red in the upper graph in Figure. There is one
linear attenuation coefficient for each possible medium in the tank:
Rev.5 FOUNDATION Fieldbus Option User's Manual
This sets the linear attenuation coefficient (Radar
Pulse energy dissipation) of Lower Product. (For
Two Liquids only).
This sets the linear attenuation coefficient (Radar
Pulse energy dissipation) of Upper Product (For
Two Liquids, otherwise this is just Product/Surface
attenuation).
This sets the linear attenuation coefficient (Radar
Pulse energy dissipation) of Vapor.
( 0 ) =
��������������
Page 145