BRONKHORST HIGH-TECH B.V.
9.17.044
page 9
1.4 Liquid conversion factors
The general formula for determining the relationship between signal and mass flow reads:
V
k c
signal
p
m
= ⋅
⋅ Φ
in which:
V
signal
= output signal
k
= calibration constant
c
p
= heat capacity at constant pressure of the fluid
Φ
m
= mass flow
A conversion factor must be used if the liquid flow meter is not used on the calibrated liquid.
This conversion factor reads:
1
2
m
m
Cf
Φ
⋅
=
Φ
Cf
c
c
p1
p2
=
in which:
c
p1
= heat capacity of the calibration liquid
c
p2
= heat capacity of the new liquid
For application of this formula consult Bronkhorst High-Tech B.V.
1.5 Software for physical properties of gases and liquids.
Bronkhorst High-Tech B.V. gathered the physical properties of over 600 fluids in a database called
FLUIDAT
.
Application software, such as FLUIDAT
on the Net (FOTN), enable the user to calculate accurate
conversion factors, not only at 20°C/1 atm, but at any temperature/pressure combination.
Apply to your distributor for more details of this software.
