Brookfield DV-I Prime Manual do Utilizador descarregar pdf (Página 60)

Brookeld Engineering Laboratories, Inc. Page 60 Manual No. M/07-022-D0613

Calibration Check Procedure for Cone/Plate Viscometers

1) Follow the procedures outlined in Appendix A for mechanically adjusting the setting of

the cone to the plate.

2) Refer to Appendix A, Table A-1, and determine the correct sample volume required for

the spindle to be utilized.

3) Select a viscosity standard uid that will give viscosity readings between 10% and 100%

of Full Scale Range. Refer to Appendix B for viscosity ranges of cone spindles. Do not

use a silicone viscosity standard uid with a viscosity value greater than 5000 cP with

a Cone/Plate Viscometer. Brookeld offers a complete range of mineral oil viscosity

standards suitable for use with Cone/Plate Viscometers. See Table E-2 in Appendix E.

It is best to use a viscosity standard uid that will be close to the maximum viscosity for

a given cone spindle/speed combination.

LVDV-I PRIME Viscometer, Cone CP-42, Fluid 10

Having a viscosity of 9.7 cP at 25°C

At 60 RPM, the Full Scale Viscosity Range is 10.0 cP. Thus, the Viscometer reading

should be 97% torque and 9.7 cP viscosity ± 0.197 (closer to ±0.2) cP. The accuracy is

a combination of Viscometer and uid tolerance (refer to Interpretation of Calibration

Test Results at the end of this section).

4) With the viscometer stopped, remove the sample cup and place the viscosity standard

uid into the cup.

5) Connect the sample cup to the Viscometer. Allow sufcient time for temperature to reach

equilibrium.

6) Measure the viscosity and record the Viscometer reading in both % torque and centipoise.

NOTE: The spindle must rotate at least ve (5) times before readings are taken.

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Brookfield DV-I Prime Manual do Utilizador Página 60