HollySys HT5 Series Instructions For Use Manual page 37

e. If the user is given gas mass Flow rate Qm, is calculated using the formula Ks:
The above formulas:
ρ ------
The density of the measured medium
Liquid measured medium density refers to the 20 ℃, 0.1013MPa under（g/cm
Gas measured medium density refers to the 20 ℃, density 0.1013MPa under (kg/m
ρ ------
The density of the selected float
s
Stainless steel float density is 7.8g/cm
PTFE float density is 3.4g/cm
Nickel-based alloy density float is 8.3g/cm
ρ ------
Air (20 ℃, 0.1013MPa) calibration state density,1.205kg/m
n
T ------
The absolute temperature of the measured medium
T ------
Absolute temperature calibration medium
n
P ------
Absolute pressure measured medium
P ------
Absolute Pressure Calibration medium
n
7.2 Float Caliber and measurement range is determined
A.
According to the user in the selection parameter specifications provided by the book,
select the appropriate correction coefficient calculation formula to calculate the
corresponding calibration medium flow
Qs---
Refers to the standard medium (air or water) Flow rate in the calibration status
Q ---
It refers to the medium flow provided by the user


P

K =
d
. 0 932




1

K =
n
e


. 1 293

T
n

P T

P T
n

P T
n
3
3
3
(293.15K)
(MPa)
(0.1013MPa)
Q :Q =K ×Q
s s x
34
3
(K)
3
）
3
)