Operation using the data setting device
Azbil Corporation
5-14
Model MTG11A/18A, MTG11B/18B, MTG14C
5-5-1 : Changing setting of damping time constant
Damping means a response time of the primary time lag (63.2% response) for a step
response of the flow rate. If the out fluctuations are large, increase the damping. A
large damping value stabilizes the output but lowers the response performance. We
suggest setting the damping to the largest value the system can accept.
Figure 5-1 Damping output characteristics
Set the damping time constant 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 until the cursor is at the value to
be changed. In this example, the key is pressed
three times to move to the position “5.”
4
Press the or key to display a time constant to
be changed. In this example, the key is pressed
five times to change the damping time from 5
seconds to 10 seconds.
5
Press the key until the cursor is back at the
mode indicator.
Press the MODE key to return to the
MEASURING MODE and to 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.
Electromagnetic
flowmeter
Input of step response
Output of response
63.2%
Damping (s)
MTG
20.0 %
01.94 m
3
/h
WP0
00069401
20.0 %
* OPERATOR'S
MODE
20.0 %
* DAMPING
005.0 s
20.0 %
* DAMPING
005.0 s
20.0 %
* DAMPING
005.0 s
20.0 %
* DAMPING
005.0 s
CM2-MTG300-2001.book 14 ページ 2015年9月29日 火曜日 午前10時14分
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