Panametrics PanaFlow MV80, User Manual, Page: 175 / 184

PanaFlow™ MV80, MV82 & MV84 User’s Manual 163
Appendix C. Flow Meter Calculations
C.4.3b Viscosity
The liquid viscosity is found by Andrade's equation. This uses two viscosities at different temperatures to extrapolate
the viscosity.
Andrade's equation:

A
L
B
L
T
degR
------------- exp
=
To find A and B:
B
L
T
degR1
T
degR2
In

1

2
  
T
degR2
T
degR1
–
--------------------------------------------------------------
=
and
A
L

1
B
L
T
degR1
  
exp
------------------------------------------
=
The temperatures are all in degrees Rankin. Do not misinterpret the subscript
R
to mean that they are reduced
temperatures.