CeYeKo LUDP, User Manual, Page: 19 / 61

C Y K Tech
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Page 19
Installation on nipple joint – arch tank
top
Installation on flange – arch tank top
(2) Arch Top Tank
For arch tank, it’s better not to install the meter in the middle of the tank top. Ins-
tead, the meter shall be installed at 1/2 or 2/3 of the tank top radius (under the pre-
mise that certain distance from the tank wall is met). The arch tank top is like con-
vex lens to the ultrasonic pulse. If the probe is installed at the focus of convex lens,
it will receive all the false echoes. Therefore, the sensor shall not be installed in the
middle of the arch tank top.
For most arch tanks, the length of connecting pipe plus flange on the top is 150-
180mm. But the part below the probe thread of ultrasonic level meter is not so long
(elongated probe is available for customization to make sure the probe emitting sur-
face is below the connecting pipe bottom). In this case, the proportional relation
between the diameter and length of connecting pipe shall be noted.
#
Length of Con-
necting Pipe
Minimum In-
ner Diameter
of Connecting
Pipe
Remarks
1 150mm 100mm
The inner wall of connecting pipe is free of
burr and bulges and vertical and the weld
joint shall be polished.
The connection of connecting pipe and tank
top shall be outwards polished at an oblique
angle of 45º.
2 200mm 150mm
3 250mm 180mm
4 300mm 220mm
5 400mm 280mm