Instruction manual
NivuSonic Clamp on
®
NivuSonic CO - Rev. 00 as of 08.12.2010
Page 15
Fig. 4-3
Two-path transit time measurement principle
Investigate the velocity as described below presuming C>>
υ
1-2
:
(
)
−
⋅
+
Φ
⋅
=
−
−
−
−
−
1
2
2
1
2
1
2
1
2
1
1
1
cos
2
t
t
L
α
υ
bzw.
(
)
−
⋅
+
Φ
⋅
=
−
−
−
−
−
3
4
4
3
4
3
4
3
4
3
t
1
t
1
cos
2
L
α
υ
Presuming identical flow velocities in the paths it is possible to additionally de-
termine the deviation angle
α
of the flow direction in two-path installations. This
angle can be derived from a comparison between the readings from the single
paths.
Φ
⋅
+
Φ
⋅
Φ
⋅
−
Φ
⋅
=
−
−
−
−
−
−
−
−
4
3
2
1
2
1
4
3
4
3
2
1
2
1
4
3
sin
sin
cos
cos
arctan
υ
υ
υ
υ
α
Summary of Contents for NivuSonic Clamp On
Page 109: ...18 Declaration of Conformity...
Page 110: ......
