Brookfield DV1 User Manual

Brookeld Engineering Laboratories, Inc. Page 47 Manual No. M14-023
Appendix F - Calibration Check Procedures
For more help go to
www.brookeldengineering.com and download the video.
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. e display will show 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 increase from +/-1% to +/-2%.
• Small Sample Adapter
• ermosel
• UL Adapter
• DIN Adapter
• Spiral Adapter
e accuracy of the DV1 is veried using viscosity standard uids, which are available from Brookeld
Engineering Laboratories or your local Brookeld agent. Viscosity standards are Newtonian, and there-
fore, 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 DV1 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 Ap-
pendix G for more information on the guard leg).
Normal 25ºC Standard Fluids
Viscosity (cP) Viscosity (cP)
High Temperature Standard Fluids
ree 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 catalog for more information
Table F-1

Brookfield DV1 Specifications

General

Speed Range	0.3 to 100 rpm
Display	LCD
Number of Speeds	18
Power Supply	100-240 VAC, 50/60 Hz
Viscosity Range	1 to 2, 000, 000 cP
Temperature Measurement	Optional
Accuracy	±1% of full scale range
Repeatability	+/- 0.2%