Brookfield DV-II+ Digital Viscometer - Manual (Page 34)

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Appendix E - Calibration Procedures
The accuracy of the DV-II+ is verified using viscosity standard fluids which are available from
Brookfield Engineering Laboratories or your local Brookfield agent. Viscosity standards are Newtonian,
and therefore, have the same viscosity regardless of spindle speed (or shear rate). Viscosity standards,
calibrated at 25
°
C, are shown in Table E1.
Container size: For Viscosity Standards <30,000 cP, use a 600 ml Low Form Griffin Beaker
having a working volume of 500 ml.
For Viscosity Standards
≥
30,000 cP, use the fluid container.
Inside Diameter: 3.25"(8.25cm)
Height:
4.75"(12.1cm)
Note: Container may be larger, but may not be smaller.
Temperature: As stated on the fluid standard label: (
±
) 0.1
°
C
Conditions: The DV-II+ should be set according to the operating instructions. The water bath
should be stabilized at test temperature. Viscometers with the letters “LV” or
“RV” in the model designation should have the guard leg attached.
Brookfield Viscosity Standard Fluid General Information
We recommend that Brookfield Viscosity Standard Fluids be replaced on an annual basis, one year
from date of initial use. These fluids are pure silicone and are not subject to change over time.
However, exposure to outside contaminants through normal use requires replacement on an annual
basis. Contamination may occur by the introduction of solvent, standard of different viscosity or
other foreign material.
Viscosity Standard Fluids may be stored under normal laboratory conditions. Disposal should be in
accordance with state, local and federal regulations as specified on the material safety data sheet.
Brookfield Engineering Laboratories does not recertify Viscosity Standard Fluids. We will issue
duplicate copies of the Certificate of Calibration for any fluid within two years of the purchase date.
5 5,000 HT-30,000
10 12,500 HT-60,000
50 30,000 HT-100,000
100 60,000
500 100,000
1,000
**25
°
C, 93.3
°
C, 149
°
C
Refer to Brookfield catalog
for more information.
Normal 25
°
C Standard Fluids High Temperature Standard Fluids
Three Viscosity/Temperatures** Viscosity (cP) Viscosity (cP)
Table E1