Flexim FLUXUS H721 - Page 147

13 User modes
FLUXUS H721 13.3 SuperUser mode and SuperUser ext. mode
147
UMFLUXUS_H721V1-5EN, 2022-05-15
13.3.3 Linear calibration
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.
• Select the menu item Special settings in the program branch Options.
• Press ENTER until the menu item Linear calibration is displayed.
•Select Off to measure without linear calibration.
•Select Default if no customized inputs are to be made.
•Select On to define the values for the calibration.
• Press ENTER.
• Enter the factor for the linear calibration.
• Press ENTER.
• Enter the offset for the linear calibration.
• Press ENTER.
v – measured flow velocity
m – factor, range: -2...+2
n – offset, range: -12…+12 cm/s
v
cor
– corrected flow velocity
Notice!
It will not be displayed during the measurement that the correction of the flow velocity is activated.
Options\Special settings\Linear calibration
Options\...\Factor
Options\...\Offset
Example
factor: 1.1
offset: -10 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
factor: -1
offset: 0
Only the sign of the measured values changes.
Notice!
The correction data will not be stored until a measurement is started.
If the transmitter is switched off without starting a measurement, the entered correction data will be lost.