Brookfield DV-E Viscometer - Manual (Page 24)

Brookfield Engineering Labs., Inc. Page 24 Manual No. M98-350-J0912
Appendix D - Calibration Check Procedures
Brookfield’s accuracy statement for viscometers used with standard spindles is +/- 1% of full scale
range. When measuring viscosity with a specific spindle rotating at a defined speed, the maximum
viscosity that can be measured is defined as full scale range. For digital viscometers, this value is
easily determined by pressing the “AUTORANGE” key. The display will how the full scale range
viscosity in cP or mPa•s and the torque value will show “100%”. Multiply the full scale range
viscosity by 1% to determine the accuracy of any future measurement made with that spindle/speed
combination.
When using the following accessory devices with your viscometer, the accuracy is +/- 2%. Dimensional
tolerances in the accessory device allow for the increase from +/- 1% to +/-2%.
• Small Sample Adapter
• Thermosel
• Ul Adapter
• DIN Adapter
• Spiral Adapter
For more help you can go to the website,
www.brookfieldengineering.com, and download the video.
The accuracy of the DV-E 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 D-1.
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-E should be set up 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 when using
Viscosity Standard Fluids below 30,000 cP.