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16 Advanced functions
FLUXUS F808
16.6 Profile correction
131
UMFLUXUS_F808V2-2EN, 2020-06-25
• Enter the cut-off flow.
• Press ENTER.
All positive values of the flow velocity smaller than this limit are set to zero.
• Enter the cut-off flow.
• Press ENTER.
All negative values of the flow velocity greater than this limit will be set to zero.
If
Cut-off Flow\absolut
and
user
are selected, only one value have to be entered:
• Enter the cut-off flow.
• Press ENTER.
All absolute values of the flow velocity smaller than this limit are set to zero.
16.6
Profile correction
The following settings can be made for the calculation of the fluid mechanics calibration factor k
Re
:
•
off
: profile correction 1.0
•
on
: profile correction 2.0 at ideal inflow conditions (default)
•
With disturbance
: profile correction 2.0 at non ideal inflow conditions
The following steps are necessary to set the profile correction:
• Selection of the profile correction setting for all measuring channels in the program branch
Special Funct.
• Input of the disturbance distance in the program branch
Parameter
if
With disturbance
has been selected
If
With disturbance
has been selected, the transducers have to be mounted in reflection arrangement, X arrangement
or displaced X arrangement to compensate transverse flow effects. When mounting in X arrangement, it is essential to set
the same parameters for both measuring channels and to activate for them a calculation channel with average generation.
Selection of the setting
• Select the menu item
Special Funct.
in the program branch
Measuring
.
• Press ENTER until the menu item
ProfileCorr 2.0
is displayed.
• Select a list item (default:
on
).
• Press ENTER.
Input of the disturbance distance
If
With disturbance
is selected in the menu item
Special Funct.\SYSTEM
settings\Measuring\ProfileCorr 2.0
, the disturbance distance has to be entered in the program branch
Parameter
.
• Enter the disturbance distance.
• Press ENTER.
Measurement
When starting the measurement, it is checked whether the measurement arrangement is appropriate.
Special Funct.\...\+Cut-off Flow
Special Funct.\...\-Cut-off Flow
Special Funct.\...\Cut-off Flow
Special Funct.\...\Measuring\ProfileCorr 2.0
Disturb.distance
2.3
m