Brookfield DV1 Viscometer User Manual

Page 53

Brookfield Engineering Laboratories, Inc.

Page 53

Manual No. M14-023

1) Determine Full Scale Viscosity Range using the AUTORANGE key on your instrument

or calculate with equation:

Full Scale Viscosity Range [cP] = TK * SMC * 10,000

RPM

Where:

TK = 1.0 from Table D-2 (In Appendix D)

SMC = 10 from Table D-1 (In Appendix D)

Full Scale Viscosity Range

1 * 10 * 10,000

= 50,000 cP

The viscosity is accurate to (+/-) 500 cP (which is 1% of 50,000).

2) The viscosity standard fluid is 12,257 cP. Its accuracy is (+/-) 1% of 12,257 or (+/-) 122.57 cP.

3) Total allowable error is (122.57 + 500) cP = (+/-) 622.57 cP.

4) Therefore, any viscosity reading between 11,634.4 and 12,879.6 cP indicates that the

viscometer is operating correctly. Any reading outside these limits may indicate a viscometer

problem. Contact the Brookfield technical sales department or your local authorized

Brookfield dealer with test results to determine the nature of the problem.

Calculate the acceptable range of viscosity using DV1MRV with Small

Sample adapter at 10 RPM; Brookfield Standard Fluid 12,500 with a

viscosity of 12,257 cP at 25°C:

1) Determine Full Scale Viscosity Range by pressing the AUTORANGE key on your instrument.