Brookfield DV-I Viscometer - Manual (Page 32)

Brookfield Engineering Laboratories, Inc. Page 32 Manual No. M/92-021-O604
Appendix E - Calibration Procedures
The accuracy of the DV-I+ 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 E-1 (Silicone Oils) and Table E-2 (Mineral Oils).
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-I + should be set according to the operating instructions. The water
bath must be stabilized at test temperature. Viscometers with the letters “LV”
or “RV” in the model designation must have the guard leg attached (see page
34 for more information on the guard leg).
Normal 25
°
C Standard Fluids High Temperature Standard Fluids
Viscosity (cP) Viscosity (cP) Three Viscosity/Temperatures**
5 5,000 HT-30,000
10 12,500 HT-60,000
50 30,000 HT-100,000
100 60,000
500 100,000 **25
°
C, 93.3
°
C, 149
°
C
1,000 Refer to Brookfield catalog for
more information.
Table E-1
MINERAL OIL VISCOSITY STANDARD FLUIDS
BEL Part No. Viscosity (cP) 25
°
C
B31 31
B210 210
B750 750
B1400 1,400
B2000 2,000
B11000 11,000
B20000 20,000
B80000 80,000
B200000 200,000
B420000 420,000
Table E-2