9 Basic Measurement FLUXUS WD100, WD200
UMFLUXUS_F5WDV1-1EN, 2016-04-08 45
9.1.4 Pipe Lining
If Other Material is selected, the sound speed has to be entered.
For the sound speed of some materials see annex C.1.
9.1.5 Pipe Roughness
The flow profile of the fluid is influenced by the roughness of the inner pipe wall. The roughness is used for the calculation
of the profile correction factor. As, in most cases, the pipe roughness cannot be determined exactly, it has to be estimated.
For the roughness of some materials see annex C.2.
9.2 Input of the Fluid Parameters
9.2.1 Fluid Temperature
At the beginning of the measurement, the fluid temperature is used for the interpolation of the sound speed and thus, for
the calculation of the recommended transducer distance.
During the measurement, the fluid temperature is used for the interpolation of the density and the viscosity of the fluid.
9.3 Extension Cable
If the pipe has an inner lining, select yes. Press ENTER.
If no is selected, the next parameter will be displayed (see section 9.1.5).
Select the lining material.
If the material is not in the scroll list, select Other Material. Press ENTER.
Enter the sound speed of the lining material. Press ENTER.
Enter the thickness of the liner. Press ENTER.
Note! The inner pipe diameter (= outer pipe diameter – 2x pipe wall thickness – 2x liner thickness) is calcu-
lated internally. If the value is not within the inner pipe diameter range of the connected transducers,
an error message will be displayed.
It is possible to change the lower limit of the inner pipe diameter for a given transducer type (see sec-
tion 11.7).
Enter the roughness of the selected pipe or liner material.
Change the value according to the condition of the inner pipe wall. Press ENTER.
Enter the fluid temperature. The value has to be within the operating temperature range of
the transducers. Press ENTER.
If the transducer cable has to be extended, enter the additional cable length (e.g., between
the junction box and the transmitter). Press ENTER.
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