CeYeKo LUDP, User Manual, Page: 14 / 61

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Page 14
4.2.2 Select Measuring Range:
Measuring range is decided by the range of ultrasonic probe which is subject to the
site working environment, object to be measured and temperature, etc. Decide the
measuring range needed based on the table below.
Liquid Surface
Attenuation
Multiple
Attenuation
Percentage
Magnification of
Measuring Range
Stable 0dB 0%
Magnification is
unnecessary
Ripple 5...10dB 50~67%
1 times of the
measuring range
Major fluctuation (for
example, there is
mixing blade)
10...20dB 90%
3 times of the
measuring range
Solid Material Surface
Attenuation
Multiple
Attenuation
Percentage
Magnification of
Measuring Range
Hard, rough (such as gra-
nular rubber)
40dB 99%
10 times of the
measuring range
Soft (such as pulverized
coal, cement and coal
ash)
40...60dB
99
～
99.9%
Use not
recommended
With Dust
Attenuation
Multiple
Attenuation
Percentage
Magnification of
Measuring Range
None 0dB 0% Magnification is unnecessary
Little 5dB 50%
1 times of the
measuring range