Ad-weighing SV-100 Manual do Utilizador descarregar pdf (Página 17)

4-4 Measuring the Absolute Value of Viscosity

The SV Series Sine-wave Vibro Viscometer, as a measuring principle, detects the product of viscosity

and density.

Displayed viscosity value = Viscosity × Density ⋅ ⋅ ⋅ ⋅ ⋅ [1]

While the displayed value has a unit of mPa⋅s, it indicates the product of viscosity and density.

Example (1) When a sample has an absolute value of viscosity of 2.00 mPa⋅s and density of 1.000:

Displayed value = 2.00 [mPa⋅s] × 1.000

= 2.00 [mPa⋅s]

(2) When a sample has an absolute value of viscosity of 2.00 mPa⋅s and density of 0.800:

Displayed value = 2.00 [mPa⋅s] × 0.800

= 1.60 [mPa⋅s]

Note

The density can be measured, using the density determination kit, AD-1653 in

combination with a balance.

To obtain the absolute viscosity value precisely, do as follows:

4-4-1 At Measurement

Divide the displayed viscosity value by the sample density to obtain the absolute value of viscosity.

Example (1) Measure the sample and confirm the displayed viscosity value.

Here, 736 mPa⋅s as an example.

(2) Check the sample density at the temperature when the sample is measured.

Here, 0.856

as an example.

(3) Divide the displayed viscosity value by the sample density to obtain the absolute value

of viscosity.

Here, 860 mPa⋅s is obtained as the absolute viscosity value.

Absolute value of viscosity =

= ≅ 860 mPa⋅s

Displayed viscosity value

Sample density

736

0.856

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Ad-weighing SV-100 Manual do Utilizador Página 17