11 Basic Measurement FLUXUS G60x
UMFLUXUS_G6V4-2EN, 2011-03-29 73
11.1.4 Pipe Lining
It can be specified which materials will be displayed in the scroll list (see section 16.5).
If Other Material is selected, the sound speed must be entered.
For the sound speed of some materials see annex C.1.
11.1.5 Pipe Roughness
The flow profile of the medium is influenced by the roughness of the inner pipe wall. The
roughness will be used for the calculation of the profile correction factor. As, in most cas-
es, the pipe roughness can not be exactly determined, it has to be estimated.
For the roughness of some materials see annex C.2.
If the pipe has an inner lining, select yes. Press ENTER.
If no is selected, the next parameter will be displayed (see
section 11.1.5).
Select the lining material.
If the material is not in the scroll list, select Other Mate-
rial. Press ENTER.
Enter the sound speed of the lining material. Press EN-
TER.
Enter the thickness of the liner. Press ENTER.
Note! The inner pipe diameter (= outer pipe diameter - 2x pipe wall thick-
ness - 2x liner thickness) is calculated 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 section 13.8).
Enter the roughness of the selected pipe or liner material.
Change the value according to the condition of the inner
pipe wall. Press ENTER.
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