Operation using the data setting device
Azbil Corporation
5-18
Model MTG11A/18A, MTG11B/18B, MTG14C
5-5-5 : Setting auto spike cut
This function eliminates steep noise spikes (spike noise) in the flow rate. Noise
generated when foreign matters collide with electrode is an example of the spike noise.
When the flow rate changes sharply, this function holds the outputs according to the
damping time. Generally the spike noise occurs in a few milliseconds and settles down
within the output holding time and the outputs are not affected. For ordinary flowrate
changes, the output responds after the damping hold time.
It is not recommended to use this function for applications requiring high response and
performance, e.g., the function should not be used when a pump frequently generates
pulsation.
Figure 5-2 Auto spike cut output characteristics
Set the auto spike cut in accordance with the following procedure.
Step
Procedure
Screen
1
The screen at right is a screen display example in
MEASURING MODE (measurement state).
Press the MODE key.
2
The OPERATOR'S MODE screen appears for
approx. two seconds and then the damping setting
screen appears.
3
Press the key four times to display the screen
shown on the right.
4
Press the key to move the cursor to the OFF
position.
Electromagnetic
flowmeter
MTG
Output
(not affected by noise)
Spike noise
20.0 %
01.94 m
3
/h
WP0
00069401
20.0 %
* OPERATOR'S
MODE
20.0 %
* DAMPING
005.0 s
20.0 %
* SPIKE CUT
OFF
20.0 %
* SPIKE CUT
OFF
CM2-MTG300-2001.book 18 ページ 2015年9月29日 火曜日 午前10時14分
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