www.Siargo.com
MF4700
User
Manual
18
|
P a g e
10)
Set
the
GCF
(the
gas
conversion
factor)
The
meter
is
normally
calibrated
with
air
at
20°C
and
101.325
kPa.
When
the
user
wants
to
set
the
standard
conditions
other
than
the
specified
temperature
or
applies
the
meter
for
other
allowable
gases
(please
contact
the
manufacturer
for
the
list
of
gases),
it
is
possible
to
use
this
gas
conversion
factor
function
to
ensure
the
readings
are
correct
and
desired.
The
default
value
of
the
GCF
is
1000
(1.000).
For
example,
if
one
wants
to
alter
the
standard
temperature
to
0°C,
the
factor
can
be
calculated
using
the
gas
equation:
PV/T
=
constant:
GCF
=
1000
x
V(new)
/
V
(20°C)
=
T
(o°C)
/
T
(20°C)
=
1000
x
273
/
293
=
932
Then
the
gas
conversion
factor
would
be
932.
In
some
cases,
the
actual
system
may
have
a
constant
deviation
from
that
at
the
calibration,
this
GCF
can
also
be
used
to
adjust.
For
additional
information,
please
contact
the
manufacturer.
11)
Set
the
accumulated
flow
rate
unit.
When
instant
flow
rate
unit
is
sccm,
accumulated
flow
rate
unit
can
be
set
to
scc
or
SL;
When
instant
flow
rate
unit
is
SLPM,
accumulated
flow
rate
unit
can
be
set
to
SL
or
Nm
3
.