A&D Weighing SV-100 - Manual (Page 24)

22
6-2 Calibration Procedure
Note
As to the correction value used for one-point calibration and two-point calibration, enter the
product of the absolute viscosity value and the density of the standard viscosity fluid. For
details, refer to "4-4-2 At Calibration".
After calibration, check the values, comparing the product described above with the
displayed value.
Kinetic viscosity = From this, Viscosity × Density =
Example 1: To calibrate the viscometer using a standard viscosity fluid:
Using the calculation sheet, calculate the value used for calibration.
(1) Check the kinetic viscosity and the viscosity at the temperature when the calibration is
performed.
Here, 1011 mm 2 /s for the kinetic viscosity and 889 mPa ⋅s for the viscosity at 20°C
as an example.
(2) Substitute the values above to obtain the value for .
≅781
781 mPa ⋅s is obtained as a correction value used for calibration.
Example 2: To calibrate using a standard viscosity fluid with known values of viscosity and density.
In this example, a standard viscosity fluid with a viscosity of 889 mPa ⋅s at 20°C is
used.
(1) Check the viscosity value and the density of the standard viscosity fluid at the
temperature when the calibration is performed..
Here, 889 mPa ⋅s for the viscosity and 0.878 for the density at 20°C as an example.
(2) Substitute the values above to obtain the value for Viscosity × Density.
889 × 0.878 ≅ 781
781 mPa ⋅s is obtained as a correction value used for calibration.
889 2
1011
Viscosity
Density
Viscosity 2
Kinetic viscosity is obtained.
Viscosity 2
Kinetic viscosity