Brookfield DV-I Prime - Manual (Page 60)

Brookfield 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 fluid 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 fluid with a viscosity value greater than 5000 cP with
a Cone/Plate Viscometer. Brookfield 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 fluid 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 fluid 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
fluid into the cup.
5) Connect the sample cup to the Viscometer. Allow sufficient 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 five (5) times before readings are taken.