User's Guide

Saab TankRadar
®
ProPro Setup
4-26
Edition 2. Ref. No: 306010E
Setting a general amplitude threshold
1 Click the Read button
Response: a spectrum is displayed showing the radar amplitude vs.
distance from the gauge to the product surface (ullage).
2 Set the general Amplitude Threshold. Echoes with amplitudes
below the general amplitude threshold will be disregarded. Recom-
mended threshold value:
Calm conditions: no turbulence, foam or condensation. Set ampli-
tude threshold to approximately 20% of surface echo amplitude.
Foam, agitators: check amplitude of surface echo when foam is
present or agitator is running. Set amplitude threshold to approxi-
mately 30% of surface echo amplitude.
Note that these figures are approximate estimations. Significant
deviations from these figures may be have to be used in many
cases.
Creating a customized noise threshold table
You can filter out weak disturbing echoes by creating a noise
threshold table. This technique should only be used in special
situations, for example at the bottom of tanks with weak disturbing
echoes. In such tanks the transmitter may lock at disturbances
close to the bottom when the tank is empty. Setting up a noise
threshold in this region will guarantee that the transmitter starts
following the surface when the tank is filled again.
General
amplitude
threshold