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59
NT UF 811 CO GB (c) / March 2014
5.6 ADVANCED configuration
Comment: This section will be restricted to an explanation of the additional functions of advanced
configuration compared to the two modes defined above (simple and normal). The entire common base
already explained above in this document is not repeated in this section.
5.6.1 "Pipe/fluid settings" menu
1) Delta V filtering
When a filter has been activated, it is possible to request that the flow meter disables the filter if the
measurement evolves very quickly. This provides a filter which is sufficient to comfortably see the evolution
of the measurement and to retain reactivity while not filtering large variations in velocity.
2) Weighting coefficients of the chords
A weighting coefficient is a corrective factor and is applied when calculating the velocity. For example, if you
wish to reduce the velocity of a chord by 10%, a coefficient of 0.9 must be entered.
3) Required gain and Maximum gain
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 parameter, you can limit the gain so that the unwanted acoustic noise does not
disrupt the operation of the flow meter.
Important: It is highly recommended to contact Ultraflux before modifying these settings.