Yokogawa digitalYEWFLO (DY) - Manual (Page 106)

<11. MAINTENANCE>
11-8
IM 01F06A00-01EN
Where
M :
Mass fl ow
Q
n
: Volumetric fl ow rate at standard condition
Q
f
: Volumetric fl ow rate at oprtating condition
T
n
: Temperature at operating condition (°C),
(°F)
T
f
: Temperature at standard condition (°C), (°F)
T
ft
: Measured temperature value (°C), (°F)
P
f
: Pressure at operating condition (kPa abs),
(psi)
P
n
: Pressure at standard condition (kpa abs),
(psi)
K : Deviation factor
ρ
ft
: Density calculated by temperature value
ρ
n
: Density at standard condition (kg/m 3 ), (lb/cf)
ρ
f
: Density at operating condition
U
pf
: Density unit conversion factor
U
k(kg)
, U
k(Nm 3 )
, U
k(m 3 )
: Flow rate unit conversion
factor
a
1
: 1st temperature coeffi cient
a
2
: 2nd temperature coeffi cient
Example: conversion factor in kg.
kg
: U
k(kg)
=1
ton : U
k(kg)
=0.001