Azbil MagneW Two-wire PLUS+ MTG15A, User Manual

Page: 83 / 280

5-13
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.
Electromagnetic
flowmeter
Input of step response Output of response
63.2%
Damping (s)
MTG
Fig. 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.
20.0 %
01.94 m 3 /h
WP0 00069401
2 The OPERATOR'S MODE screen appears for approx.
two seconds and then the damping setting screen
appears.
20.0 %
* OPERATOR'S
MODE
20.0 %
* DAMPING
005.0 s
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.”
20.0 %
* DAMPING
005.0 s
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.
20.0 %
* DAMPING
005.0 s
5 Press the

key until the cursor is back at the mode
indicator.
Press the MODE key to return to the MEASURING
MODE and save data.
20.0 %
* DAMPING
005.0 s
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.