User's Guide

Saab TankRadar
®
ProPro Setup
4-30
Edition 2. Ref. No: 306010E
• Make sure that the level is stable before you register a disturbance
echo. A fluctuating level may indicate a temporary disturbance
which is not due to an interfering object.
• Do not register a disturbing echo if the amplitude is below the
general amplitude threshold, see description of the Spectra-Thresh-
old window.
• Do not register a disturbing echo if the amplitude is significantly
smaller than the amplitude of the surface echo when the surface is
at the same level as the disturbance. (In some cases weak disturb-
ing echoes can be filtered out by creating a noise threshold table,
see description of the Spectra-Threshold window).
• It may be necessary to register new disturbance echoes at a later
stage when objects have become visible due to surface movement.
Example 3:
This example illustrates a signal spectrum resulting from a tank
with an agitator. The product level is slightly below the agitator
in this example. In a case like this it is recommended that the
disturbing echo is registered, in order to achieve reliable meas-
urements when the product surface is passing the agitator. Of
course this is true also for disturbing echoes resulting from other
types of objects.
SurfaceAgitator