Flexim FLUXUS F502BT, Operating Instruction

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9 Measurement
FLUXUS F502TE 9.2 Measurement settings
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UMFLUXUS_F502TEV1-5EN, 2020-05-29
9.2 Measurement settings
9.2.1 Selection of the physical quantity and the unit of measurement
The following physical quantities can be measured:
• sound speed
• flow velocity: is calculated on the basis of the measured
transit time difference
• volumetric flow rate: is calculated by multiplying the flow
velocity by the cross-sectional pipe area
• mass flow rate: is calculated by multiplying the volumetric
flow rate by the operating density of the fluid
• thermal energy rate: is calculated from the volumetric flow
rate, the temperatures measured on the supply and return
lines, and the thermal energy rate coefficients of the fluid
The physical quantity is selected as follows:
• Select the program branch
Output Options .
• Press ENTER.
• Select the physical quantity in the scroll list.
• Press ENTER.
For the selected physical quantity (except for the sound speed), a scroll list with the available units of measurement is
displayed. The unit of measurement which was selected previously is displayed first.
• Select the unit of measurement of the selected physical quantity.
• Press ENTER.
9.2.2 Input of the damping factor
Each displayed measured value is a floating average of all measured values of the last x seconds, with x being the damping
factor. A damping factor of 1 s means that the measured values are not averaged because the measuring rate is approx 1/s.
The default value of 10 s is appropriate for normal flow conditions. Values which fluctuate strongly due to a higher flow
dynamic, require a higher damping factor.
• Select the program branch
Output Options
.
• Press ENTER until the menu item Damping is displayed.
• Enter the damping factor.
• Press ENTER.
• Press BRK to return to the main menu.
Output Options
Physic. Quant.
Unit Of Measure
Damping
see annex A, p. 147
Output Options\Physic. Quant.
Output Options\Physic. Quant.\Volume flow
Notice!
If the physical quantity or the unit of measurement is changed, the settings of the outputs have to be checked (see
section 9.2.3).
Output Options\...\Damping