Azbil MagneW Two-wire PLUS+ MTG15A, Руководство пользователя

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5-18
5-5-6. Setting moving average processing
This function is used to carry out the moving average processing of the measured flow rate
values. The model MTG performs the flow rate calculation every 400 ms. For example, if the
moving average process time is set to 2 seconds, the moving average processing will be carried
out 2 sec. / 400 ms = 5 times.
If pulsation are generated, this function can be used to suppress the flow rate fluctuations.
The moving average processing can be given by the following formula:
Qcurrent
Qk
n
1 =
k
k
--------------- =
Σ
Example) When the moving average processing is set to 2 sec.:
Qcurrent
q
k
Q
k
1 –
Q
k
2 –
Q
k
3 –
Q
k
4 –
+ + + +
5
=
where q
k
is a value currently measured, and Q
k
is a previous output value.
Set range: ON / OFF
ON (1.0 to 30.0 s)
Default: OFF
Electromagnetic
flowmeter
MTG
Response output
Moving average time (s)
Input of step response
Fig. 5-3. Output characteristics of moving average processing