Omega MASS FLOW FMA-1900 User Manual page 25

Mass flow meter
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K,/K,
from
the
ta
that
which
you
preferred
beca
Omega
calibra
with
primary
s
equivalent
refe
nying
your
flow
When
a
refere
within
2
to
4%
K,/K2
directly
u
some
instance
p,
enabling
you
t
C,
and
).
The
rema
,
where
the
used
gas,
nitr
K,&dKN
Kreference '
where
the
re
equivalent
to
t
K-factor
is
Ka*d
K,/K2,
instead
of
th
In
the
third
col
(6)
Please
note
th
the
fundament
For
convenien
the
ratios
Q,,)
Q,/Q,=K,/K
comgining
Equations
Q,,
to
prod
the
same
outp
We
get
this
by
Q,,
for
an
actual
gas
to
t
H/aE
=
A
constan
For
our
purpos
PC,)
(5)
where:
b
=
(bN/
Q
=
Q,
we
get:
(2)
and
solve
for
(4)
insert
the
contstant
If
we
combine
=
A
AT=aE
(4)
where:
a
0°C
780
mm
H
temperature
d
AT, is
proportio
voltage,
E,
of
p is
given
in
the
(gil);
=
The
gas
ma
p
pQ
(3)
where:
ri-r=
The
mass
flow

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