Nivus NFP, Инструкция по эксплуатации

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Parameter Setting
NFP - rev. 04 / 23.05.2018 page 65
31 Calibration and Calculation Menu (CAL)
This menu permits to adjust the level measurement, to adapt flow velocity and analog outputs
to the following system as well as to simulate relay switching actions and analog outputs.
Fig. 31-1 CAL Menu selection
31.1 CAL Menu “Velocity”
Fig. 31-2 Submenu flow velocity and value settings
>min. velocity<
Defines the minimum flow velocity range measured and evaluated
by the transmitter.
Default setting: 1 m/s
The minimum velocity can be set to “0” as soon as it is not desired to
measure the negative flow direction.
>max. velocity<
Defines the maximum flow velocity range measured and evaluated
by the transmitter.
Default setting: 6 m/s
Positive and negative velocities are not measured
If the maximum value is set to “0” it is not possible to measure and to issue the positive
velocity!
If the minimum value is set to “0” it is not possible to measure and to issue the negative
velocity!
>v-correction<
Here it is possible to add a factor to measured and calculated flow
velocity values. Normally it is not necessary to use this parameter
since the NFP calculation functions have been optimised regarding
full pipes and flow velocity detection using the cross correlation
method does not require any calibration as long as physical condi-
tions are sufficient.