Ultraflux Uf 841, User Manual

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NT UF 841 CP GB (d) / June 2015
3) Laminar/turbulent transition
We have previously mentioned in this document the flow type (laminar or turbulent) for the calculation of
KH. In "Advanced" configuration mode, you can change part of the KH calculation mode by defining the
laminar/turbulent transition point.
(a) Laminar flow
(b) Turbulent flow
The transition between the two types of flow varies according to the case and the measurement points. It is
possible to change the configuration of this transition within the flow meter by changing the critical value of
the Reynolds number (Reynolds number at which the flow transition occurs) and width LBR of the transition.
Comment: The higher the LBR, the more abrupt the transition.
4) Seek gain and Gain max
The gain is the parameter which determines the amplification of the ultrasonic signal required for the flow
meter to take a measurement. If the flow meter needs to increase the gain, this means that the ultrasonic
signal received is very weak. The poorer the quality of the signal, the greater the gain and the more difficult
it is to measure the flow.
Using the maximum gain setting, you can reject measurements if the gain exceeds the value entered in the
flow meter.
Important: You are strongly advised to contact Ultraflux before modifying these settings.