Flexim FLUXUS WD - Linear Calibration

13 User modes
13.3 SuperUser Mode and SuperUser ext. mode FLUXUS WD
2018-07-16, UMFLUXUS_WDV1-3EN
110
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 user-defined 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 that the correction of the flow velocity is active during the measurement.
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 only be stored when a measurement is started.
If the transmitter is switched off without starting a measurement, the entered correction data will be lost.