L-737-3-E
3.1.2 General Performance
Item
Description
Model
CA00
Flow rate
Max. allowable rate
300kg/h
Max. service rate
0kg/h
Min. setting rate
kg/h
Guaranteed min. rate
.kg/h
Accuracy
Less than .kg/h
±
0.0% of max. allowable rate
.kg/h or above to 300kg/h or less
±
0.% of RD
Repeatability
Less than .kg/h
±
0.0
%
of max.
fl
ow rate
.kg/h or above to 300kg/h or less
±
0.% of RD
Analog output accuracy
±
0.% of FS added to each accuracy
Pressure loss
(Reference)
Water: at Max. allowable
rate
.MPa
CAUTION:
1. Since the casing of sensor unit is not pressure resistant, the withstanding pressure rating
of the casing is not indicated. To afford adequate protection to personnel, an Rc 1/4 boss is
provided in an area shown in Fig. 4.1; Use customer's discretion in providing a rupture disc,
pressure switch, etc. Rupture disc pressure rating and pressure switch setting is 7 MPa (G).
A precaution to remember: removing the Rc 1/4 plug with the boss pointing downward may
result in the leakage of inert argon gas. In this case, refill with an inert gas, such as argon.
For further details of treatment, consult OVAL.
2. Density measurement and volumetric flowmetering are unacceptable.
3.1.3 Pressure Loss
◎
How to determine pressure loss (liquids only)
() Find the pressure loss coef
fi
cient C from the
fl
ow rate (kg/h) and viscosity of parameter (mPa
・
s). Dividing this
value C by speci
fi
c gravity d ( for water) gives the pressure loss, thus
() For high-viscosity liquids not shown in the graph, calculate the pressure loss by using the following equation:
where
Δ
P
: Pressure loss of high-viscosity liquid (MPa)
μ
: Viscosity of high-viscosity liquid (mPa
・
s)
d : Speci
fi
c gravity of high-viscosity liquid ( for water)
μ
: Maximum viscosity shown in the graph (mPa
・
s)
C : Pressure loss coef
fi
cient found from the maximum viscosity curve at a given
fl
ow rate (kg/h)
(3) For pressure loss of gases, consult OVAL.
CA004
Pr
es
su
re
lo
ss
c
oe
ff.
, C
Flow rate (kg/h)
Fig. 3.
Δ
P
2
= C× ×
1
d
μ
2
μ
1
d
C
Δ
P= (MPa)
0.00001
0.1
1
10
100
1000
0.0001
0.001
0.01
0.1
1
10
100
1000mPa・s
100mPa・s
10mPa・s
1mPa・s
0.01mPa・s