MF5700
User
Manual
17
|
P a g e
5.5.3
Set
the
RS485
Modbus
address
After
the
password
is
verified
and
entered
into
the
MENU
settings,
press
the
“Up”
or
“Down”
key
until
the
screen
shows
the
F2
‐
Addr
as
indicated
to
the
left.
The
Modbus
address
has
3
digits,
which
can
be
any
number
between
001
to
255.
Press
the
“M”
key
to
enter
into
the
change
address
screen.
Press
the
“Up”
or
“Down”
key
to
change
the
flashing
digits,
and
then
press
the
“M”
key
to
confirm.
After
the
address
is
set,
the
display
will
return
to
F2
‐
Addr,
which
indicates
the
task
is
completed.
Press
the
“Up”
or
“Down”
key
to
select
F99
‐
qUIT
and
the
“M”
key
to
exit
the
MENU
and
return
to
the
Main
Display
screen.
5.5.4
Set
the
RS485
communication
baud
rate
Following
the
above
‐
mentioned
steps,
at
the
MENU
setting
screen,
use
the
“Up”
or
“Down”
key
to
select
F3
‐
bPS
and
then
press
the
“M”
key
to
set
the
RS485
communication
baud
rate.
There
are
6
baud
rates
selectable,
depending
on
your
system
requirements:
4800,
9600,
19200,
38400,
57600,
and
115200.
The
default
baud
rate
is
9600.
Use
the
“Up”
or
“Down”
key
to
select
the
desired
one
and
press
the
“M”
key
to
confirm.
The
display
will
then
return
to
the
F3
‐
bPS
screen,
which
indicates
the
task
is
completed.
Use
the
“Up”
or
“Down”
key
to
select
F99
‐
qUIT
and
the
“M”
key
to
exit
the
MENU
and
return
to
the
Main
Display
screen.
5.5.5
Reset
or
calibrate
the
offset
After
a
certain
time
of
usage,
the
meter’s
offset
(zero
flow
rate)
might
or
might
not
have
a
small
shift.
Or
when
you
apply
the
meter
for
different
gases,
the
offset
might
be
shifted.
To
ensure
measurement
accuracy,
it
is
necessary
to
reset
or
calibrate
the
offset.
Following
the
above
‐
mentioned
steps,
at
the
MENU
setting
screen,
use
the
“Up”
or
“Down”
key
to
select
F11
‐
oFFST.
Before
performing
the
task,
make
sure
there
is
absolutely
no
flow
in
the
flow
channel,
otherwise,
it
will
create
even
bigger
erroneous
measurement
results.
