KEM FAU 50, Руководство пользователя

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12
Programming
Version: FAU_M_EN_170308_E004
3.1.5. Gate Memory
This parameter determines the number of measurements which will be
considered for calculating the actual measuring frequency (the
response time of the measuring results depends on the gate time
setting). With n > 0, the FAU calculates an average value considering
the last n measurements and the actual measurement. The influence of
the actual measurement can be determined as follows:
100 % ∗
1
𝑛𝑛+1
This way unique or rare disturbances are prevented from fully affecting the measuring results.Adaption of both
parameters gate time and -memory enables for any temporary behaviour whatever.
Example: The analogue output of the FAU supplies a controller with instantaneous values. You can prevent the
upper harmonic waves (caused by pumps) in the flow signal from affecting the controller by chosing an
appropriate gate time.
Quickly falling or rising flow values can cause the control unit to oscillate. Considering your controller settings,
you should therefore reduce the influence of the actual flow value on the previous measuring results by chosing
a higher value for gate memory.
Enter with , after that the FAU goes back to the K-Factor level.
From the parameter level there are three possibilities to go on:
To go through the present parameter level again in the above-mentioned order and change single
parameters if necessary.
To go back to the measuring mode. The parameter settings do now apply.
To call up the next parameter level.
Parameter Level „Analogue Output Scaling“ 3.2.
The main function of the FAU is to generate a current or voltage signal proportional to the input frequency.
The present parameter level contains the parameters which are necessary to scale the analogue output for 0/4
to 20 mA or 0/2 to 10 V.
Only flow values have to be entered for the analogue output. The unit (see chapter 3.1.2) and resolution (see
chapter 3.1.3) as entered in the parameter level "K-factor" (see chapter 3.1) apply.
You do not need to adjust the analogue output considering the frequency. The FAU knows the relation between
flow rate and frequency by the K-factor (see chapter 3.1.1).
Press to programme the analogue output.
Press to select the next parameter level.