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May 2016
Reference Manual
00809-0100-4530, Rev DD
306
Typical surface echo amplitudes and thresholds
shows typical signal amplitude of the surface echo (signal strength)
at different distances to the surface. The signal amplitude of the surface echo depends on
the dielectric constant of the product. Product with a high dielectric constant (for example
water) gives better reflection (a strong signal amplitude) than product with a low dielectric
constant (for example oil).
Note
The amplitude of the surface echo is also depended on the distance to the product surface.
Since the signal is attenuated along the probe, the surface echo will be strongest close to
the tank top, and then weaker further away from the tank top. In addition, the signal
amplitude of the surface echo can vary because of product, foam, turbulence, ambient
temperature and so on.
The values in
are estimations. Significantly different Surface
Threshold values may have to be used to handle special tank conditions and applications.
Figure C-5. Typical Surface Echo Amplitude for Coaxial Probe
18000
DC 80
DC 20
DC 10
DC 5
DC 3
DC 2.0
DC 1.5
0
3.3 (1)
6.6 (2)
9.8 (3)
13.1 (4)
16.4 (5)
19.7 (6)
16000
14000
12000
10000
8000
6000
4000
0
2000
Amplitude (
m
V)
Distance, ft (m)
Содержание 5300 Series
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