Flexim FLUXUS WD, Operating Instruction

Page: 90 / 174

9 Measurement
9.4 Display of measured values
FLUXUS WD
2018-07-16, UMFLUXUS_WDV1-3EN
90
Transducer distance
By pressing key during the measurement, it is possible to scroll to the display of the transducer distance.
The recommended transducer distance (here: -41.0 mm) is displayed in brackets. The measured transducer distance
(here: -35.0 mm) is displayed afterwards.
The recommended transducer distance might change during the measurement (e.g., due to temperature fluctuations).
A deviation from the optimum transducer distance (here: 6 mm) will be compensated internally.
Tab. 9.6: Description of the status line
value explanation
S
signal amplitude
0
…
9 < 5 %
…
≥ 90 %
values ≥ 3 are sufficient for the measurement
Q
signal quality
0
…
9 < 5 %
…
≥ 90 %
c
sound speed
comparison of the measured and the expected sound speed of the fluid
The expected sound speed is calculated from the fluid parameters.
√ OK, is equal to the expected value
↑ > 20 % of the expected value
↓ < 20 % of the expected value
? unknown, cannot be measured
R
flow profile
information about the flow profile based on the Reynolds number
T fully turbulent flow profile
L fully laminar flow profile
↕ flow within the transition range between laminar and turbulent flow
? unknown, cannot be calculated
F
flow velocity
comparison of the measured flow velocity with the flow limits of the system
√ OK, the flow velocity is not within the critical range
↑ the flow velocity is higher than the current limit
↓ the flow velocity is lower than the current cut-off flow
0 the flow velocity is within the limit range of the measuring method
? unknown, cannot be measured
Fig. 9.4: Display of the transducer distance
1 – transducer distance
1