Справочник Пользователя для Emerson Process Management 3420
Reference, Installation, and Operations Manual
Section 2: Product overview
3-9000-743 Rev S
June 2013
Flow range limits
23
2.3.4
Flow range limits
The reference condition flow range limits for SeniorSonic
TM
Meters (pipe sizes from 100 mm to
900 mm) are listed in the appendix tables (
The meter capacity at reference (base) conditions of pressure and temperature may be
calculated as shown in
calculated as shown in
Equation 2-1 Meter capacity - reference conditions of pressure and temperature
where
= flow rate at reference conditions (Nm
3
/h; Scfh)
= flow rate at flowing conditions (m
3
/h; cfh)
= absolute pressure at flowing conditions (Pa; psia)
= absolute pressure at reference conditions (Pa; psia)
= absolute temperature at reference conditions (K; R)
= absolute temperature at flowing conditions (K; R)
= compressibility of gas at reference conditions
(dimensionless)
= compressibility of gas at flowing conditions
(dimensionless)
Daniel should be consulted before establishing the actual meter capacity for a particular
application.
application.
4
4
3 7 =
3 7 =
701
1
1 701
701
701 1
1
=
Q
ref
Q
f
P
f
P
ref
T
ref
T
f
Z
ref
Z
f