9 Measurement
FLUXUS G722ST-HT
9.1 Parameter input
85
UMFLUXUS_G722ST-HTV1-2EN, 2021-09-01
Roughness of the lining material
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.
In most cases, the pipe roughness cannot be exactly determined and must therefore be estimated.
• Enter the roughness of the lining material.
• Press ENTER.
This display will only be indicated if
Other material
is selected.
Lining thickness
• Enter the thickness of the lining.
• Press ENTER.
This display will only be indicated if
Yes
is selected in the menu item
Lining
.
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.
In most cases, the pipe roughness cannot be exactly determined and must therefore be estimated.
• If
Automatic
is selected, the roughness values stored in the transmitter are used.
• If
Customized
is selected, a roughness value has to be entered.
• Press ENTER.
This display will not be indicated if
Other material
is selected in the menu item
Pipe material
or
Lining material
.
9.1.3
Input of fluid parameters
Fluid temperature
The fluid temperature is used:
– at the beginning of the measurement for the interpolation of the sound speed and therefore for the calculation of the
recommended transducer distance
– during the measurement for the interpolation of the density and the viscosity of the fluid
This value is only used, if the temperature is not measured. The value has to be within the operating temperature range of
the transducers.
• Enter the fluid temperature. In case of a temperature range, enter the average fluid temperature.
• Press ENTER.
Parameters\Lining material\Other material\Roughness
Parameters\Lining thickness
Parameters\Roughness
Parameters\Fluid temp.
Notice!
If the relation between the sound speed and the temperature is not linear, see the sound speed-temperature curve.
