Emerson Rosemount 5408, Справочное руководство

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Minimum tank bottom echo amplitude
Enter the minimum allowed amplitude for the echo from the tank bottom before this
function is activated. It is recommended to use the default setting.
Enable bottom echo visible when tank is empty
Enable the Bottom echo visible when tank is empty parameter if a bottom echo is visible
when tank is empty (i.e. for flat tank bottoms). The bottom echo will then be treated as a
disturbance echo to facilitate tracking of weak surface echoes close to the tank bottom.
This function may be useful for products which are relatively transparent for microwaves,
such as oil.
Figure 7-12: Bottom Echo Visible
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A. Product surface near bottom of tank
B. Empty tank
C. Signal amplitude
D. Distance
E. Surface echo
F. Echo peak from tank bottom (at the electrical distance when product in the tank)
Prerequisites
Note
Only enable this parameter if a bottom echo is visible when tank is empty. To verify this,
use the echo curve function.
Reference Manual Service and troubleshooting
00809-0100-4408 February 2020
Rosemount 5408 and 5408:SIS Level Transmitters 135