17 SuperUser mode
FLUXUS F808
17.3 Defining flow parameters
143
UMFLUXUS_F808V2-2EN, 2020-06-25
17.3.2
Correction of the flow velocity
After the profile bounds have been defined, it is possible to define a correction of the flow velocity:
v
cor
= m · v + n
where
All quantities derived from the flow velocity will be calculated with the corrected flow velocity. The correction data will be
transmitted to the PC or printer during the online or offline transmission.
• Select
on
to define the correction data,
off
to work without correction of the flow velocity and return to the menu item
SYSTEM settings
.
• If
on
is selected, enter the slope. The input
0.0
deactivates the correction.
• Press ENTER.
• Enter the offset. Enter zero to work without offset.
• Press ENTER.
v
– measured flow velocity
m
– slope, range: -2.0...+2.0
n
– offset, range: -12.7…+12.7 cm/s
v
cor
– corrected flow velocity
Notice!
It will not be displayed that the correction of the flow velocity is activated during the measurement.
Special Funct.\...\Calibration\...\Calibration
Special Funct.\...\Calibration\...\Calibration\Slope
Special Funct.\...\Calibration\...\Calibration\Offset
Example
Slope
: 1.1
Offset
: -10.0 cm/s = -0.1 m/s
If a flow velocity v = 5 m/s is measured, before the calculation of the derived quantities, it will be corrected as follows:
v
cor
= 1.1 · 5 m/s - 0.1 m/s = 5.4 m/s
Example
Slope
: -1.0
Offset
: 0.0
Only the sign of the measured values changes.
Notice!
The correction data will only be stored when a measurement is started. If the transmitter is switched off without start
-
ing a measurement, the entered correction data will be lost.
Notice!
The correction of the flow velocity is still activated after the deactivation of the SuperUser mode.