Brookfield DVE - Appendix E - Calibration Check Procedures

AMETEK Brookeld Page 35 Manual No. M15-356-B0916
Appendix E - Calibration Check Procedures
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Brookeld’s accuracy statement for viscometers used with standard spindles is +/-1% of Full Scale Range
(FSR). 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 FSR. For digital viscometers this value is easily determined
by pressing the RANGE key. e display will show the FSR viscosity in cP or mPa•s and the torque value
will show 100%. Multiply the FSR 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 increase from +/-1% to +/-2%.
• Small Sample Adapter
• ermosel
• UL Adapter
• DIN Adapter
• Spiral Adapter
e accuracy of the DVE is veried using viscosity standard uids, which are available from AMETEK
Brookeld or your local authorized dealer. 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 F-1 (Silicone Oils) and Table F-2 (Mineral Oils).
Container size: For Viscosity Standards < 30,000 cP, use a 600 mL Low Form Grin Beaker
having a working volume of 500 mL.
Inside Diameter: 3.25”(8.25cm)
Height: 4.75”(12.1cm)
For Viscosity Standards
≥ 30,000 cP, use the uid container.
Note: Container may be larger, but may not be smaller.
Temperature: As stated on the uid standard label: (
+/-) 0.1°C
Conditions: e DVE should be set according to the operating instructions. e 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
Appendix F for more information on the guard leg).
Normal 25ºC Standard Fluids
Viscosity (cP) Viscosity (cP)
High Temperature Standard Fluids
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 **25ºC, 93.3ºC, 149ºC
1,000 Refer to Brookeld AMETEK catalog for more infor-
mation
Table F-1