www.Siargo.com
MF4700
User
Manual
16
|
P a g e
5.4.3.
Detailed
descriptions
of
the
functions
0)
Keyboard
security
This
function
allows
the
user
to
disable
the
keyboard
entry
after
the
meter
is
set
as
desired.
It
will
prevent
any
accidental
key
entry
that
may
alter
the
settings.
At
the
MENU,
select
“lock”
to
lock
the
keyboard.
1)
Reset
the
accumulated
flow
rate
(a)
When
instant
flow
rate
is
sccm,
the
maximum
accumulated
flow
rate
that
can
be
registered
by
the
meter
is
9,999,999.9
scc
or
999,999.99
SL.
(b)
When
instant
flow
rate
is
SLPM,
the
maximum
accumulated
flow
rate
that
can
be
registered
by
the
meter
is
9,999,999.9
SL
or
999,999.99
Nm3.
Once
the
value
is
reached,
the
accumulating
function
will
stop
processing
the
data.
It
is
necessary
to
reset
the
register
for
the
continuation
of
this
function.
Use
this
function
with
caution
as
it
will
delete
all
current
accumulated
flow
rate
data.
2)
Reset
or
calibrate
the
offset
Sometimes
or
after
a
long
time
of
use
(i.e.,
over
1
year
of
usage),
the
sensor
surface
could
have
a
thin
deposit
from
the
environment
if
the
gas
is
not
super
clean.
Depending
on
the
actual
case,
this
deposit
might
or
might
slightly
change
the
thermal
sensitivity
of
the
sensor
resulting
in
a
drift
of
the
offset
or
a
tiny
flow
at
the
zero
flow
in
the
pipeline.
Use
this
function
to
reset
the
offset
will
not
have
an
impact
on
the
meter
performance
if
such
an
offset
is
outside
of
the
100:1
calibrated
range.
Use
this
function
with
caution
and
make
sure
there
is
no
flow
when
executing
this
function,
otherwise,
it
may
incur
some
additional
errors
to
the
measurement.
3)
Set
the
Modbus
address
of
the
meter
Use
this
function
to
set
the
RS485
Modbus
address
of
the
meter.
This
setting
can
also
be
done
via
the
RS485
communication.
4)
Set
the
response
time
Use
this
function
to
change
the
response
time
of
the
meter.
The
default
one
is
10
msec.
Increasing
the
response
time
will
allow
more
data
average
and
output
a
stabler
flow
rate
if
the
actual
flow
rate
may
have
some
undesired
fluctuation.