Limaco ULM-31-HF, Operation And Installation Manual

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ULM.0.01.000RE_10_08_20
Pipe branch diameter (mm) Maximal permissible height (mm)
100 250
150 400
200 500
300 750
Requirements for pipe branch and the opening in the roof for application with low-
power reflected signal.
Mounting pipe branch height shall be no higher than its diameter:
D H

.
For these applications it is not recommended to use the pipe branches with the
height above 250 mm.
4.4 Measuring Beam Zone of Action
The device main energy is radiated in the beam determined by the directional pat-
tern.
Level transmitter
model
ULM -
31-HF
ULM -
31А1
ULM -
31А1-HF
ULM -31А1-
HF-F, ULM -
31-HF-F
ULM -
31А1-HF-
F-LC
Width of measur-
ing beam

, deg.
2 9 2 4 5
The beam diameter W is determined based on the function from the width of the
measuring beam

and the measured distance L according to the formula:






  
2
tan 2

L W
For calculation of the measuring beam zone of action, the simplified formula for the
relative level transmitter model can be used:
Level
transmitter
model
ULM -31-
HF
ULM -
31А1
ULM -
31А1-HF
ULM -31А1-
HF-F, ULM
-31-HF-F
ULM -
31А1-HF-
F-LC
Beam
diameter
L W
 
035 . 0 L W
 
157 . 0 L W
 
035 . 0
L W
 
07 . 0
L W
 
087 . 0