Azbil MagneW Two-wire PLUS+ MTG15A, User Manual

Page: 188 / 280

6-44
Setting or changing low flow cutoff: [CUT-OFF] function
Introduction
When a fluid in the detector is flowing extremely slowly, the converter judges that the fluid is
stationary and outputs a signal (4 mA DC in case of analog output) equivalent to a flow rate of
zero. The value, which becomes the threshold of this judgment is called “low flow cutoff”.
The low flow cutoff is set using a percentage over the upper range value of the flow rate
measurement range set by the URV.
CAUTION
The low flow cutoff is a factor of extreme importance that affects the operation of the entire
control process. Define the range to be controlled and start the setting carefully.
Procedure
Use the following procedure to set low flow cutoff.
Step Key Procedure SFC screen
1
CLR
( No )
Confirm that the SFC is set to “READY”.
If it is not, press the
CLR
( No )
key to set it
to “READY”.
SFCM00006009D
2
B
CONF
Press the B
CONF
key to access the
CONFIG functions.
SFCM00006018D
3
ENTER
( Yes )
NON-VOL
Press the
ENTER
( Yes )
NON-VOL
key.
SFCM00006020D
4
H
NEXT
Press the H
NEXT
key.
5
MENU I
ITEM
DE CONF.
MENU I
ITEM
DE CONF.
Pressing the
MENU I
ITEM
DE CONF.
key changes a
numeric value to the right of CUT
OFF=ON displayed on the screen from
0% up to 10% in 1 point increments.
Continuing to press the
MENU I
ITEM
DE CONF.
key
further sets CUT OFF=OFF and displays
CUT OFF=ON 0% again. Display the
low flow cutoff to be set in the range of
1- to 10% on the screen.
SFCM00006059D