Brookfield DV-E Viscometer Manual de usuario descargar pdf (Pagina 24)

Brookeld Engineering Labs., Inc. Page 24 Manual No. M98-350-J0912

Appendix D - Calibration Check Procedures

Brookeld’s accuracy statement for viscometers used with standard spindles is +/- 1% of full scale

range. When measuring viscosity with a specic spindle rotating at a dened speed, the maximum

viscosity that can be measured is dened 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.brookeldengineering.com, and download the video.

The accuracy of the DV-E is veried using Viscosity Standard Fluids which are available from

Brookeld Engineering Laboratories or your local Brookeld 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 Grifn Beaker

having a working volume of 500 mL.

For Viscosity Standards ≥ 30,000 cP, use the uid 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 uid 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.

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Brookfield DV-E Viscometer Manual de usuario Pagina 24