Evaluation Of The Test Results - Thermo Scientific HAAKE Instruction Manual

Measuring

9.3 Evaluation of the test results

The dynamic viscosity  (in mPas) is calculated using the
following equation:
 = K ( --  ) ¡ t
1 2
where:
K = ball constant in mPascm
= density of the ball in g/cm

1
= density of the liquid to be measured at the measuring

2
temperature in g/cm
t = falling time of the ball in seconds.
Test results:
The dynamic viscosity  is given in units of mPas (cP) and
must be completed by stating the sample temperature.
The dynamic viscosity  may be converted to the kinematic
viscosity  by using the following equation:
 = 

 = kinematic viscosity [mm
 = dynamic viscosity [mPas]
 = density of the liquid sample [g/cm
14
3
/gs (see chapter 11)
3
(see chapter 11)
3
2 2
/s] [1 mm /s = 1 cSt]
3
]