Azbil Corporation Operation using the data setting device
Model MTG11A/18A, MTG11B/18B, MTG14C 5-19
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:
Example) When the moving average processing is set to 2 sec.:
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
Figure 5-3 Output characteristics of moving average processing
5 Press the or key to select ON or OFF.
6 Press the key to move the cursor to the position
under *.
Press the MODE key to return to the
MEASURING MODE and save data.
m CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before
the system resets it to the previously saved value.
Step Procedure Screen
20.0 %
*
SPIKE CUT
ON
20.0 %
*
SPIKE CUT
OFF
Qcurrent
Qk
n
1=
k
∑
k
---------------=
Qcurrent
q
k
Q
k
1–
Q
k
2–
Q
k
3–
Q
k
4–
++++
5
-------------------------------------------------------------------------------=
Electromagnetic
flowmeter
MTG
Response output
Moving average time (s)
Input of step response
CM2-MTG300-2001.book 19 ページ ２０１５年９月２９日 火曜日 午前１０時１４分
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