Brookfield CAP1000 Viscometer Manual do Utilizador descarregar pdf (Página 27)

Brookeld Engineering Labs., Inc. Page 25 Manual No. M02-312A0607

Viscometer Related Variables

• Most uid viscosities are found to be non-Newtonian. They are dependent on Shear Rate and

the spindle geometry conditions. The specications of the Viscometer cone and plate geom-

etry will affect the viscosity readings. For example, if one reading is taken at 750 rpm, and a

second at 900 rpm, the two viscosity values produced may be different because the readings

were made at different shear rates. The faster the spindle speed, the higher the shear rate.

• The shear rate of a given measurement is determined by the rotational speed and the cone

angle.

• A repeatable viscosity test should control or specify the following:

1. Viscometer model

2. Cone used

3. Test temperature

4. Test speed [or the shear rate]

5. Length of time to record viscosity

6. Sample volume sufcient to cover the face of the cone

APPENDIX B - Warranty Repair and Service

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Brookfield CAP1000 Viscometer Manual do Utilizador Página 27