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Y
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Temperature Diffe-
rence Between
Probe and Medium
Surface
Attenuation
Multiple
Attenuation
Percentage
Magnification of
Measuring Range
≤20°C
0dB
0%
Magnification is unnecessary
≤40°C
5...10dB
50
～
67%
1 times of the
measuring range
≤80°C
10…20dB
67
～
90%
2 times of the
measuring range
The calculation method of signal attenuation is to add all signal attenuation amounts
if there are several conditions on site.
With little feedstock
5...10dB
With little steam
5...20dB
Temperature difference between probe and medium surface ≤40ºC
5...10dB
Total
minimum: 15dB
maximum: 40dB
Under such circumstances, if the actual maximum measuring range is 5m,
ultrasonic level meter with measuring range of 50m shall be selected for the
measurement.
Summary of Contents for LUDP
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