Brookfield DV-E Viscometer Manuale Utente Scaricare il pdf (Pagina 29)

Brookeld Engineering Labs., Inc. Page 29 Manual No. M98-350-J0912

1) Calculate full scale viscosity range using the equation:

Full Scale Viscosity Range

[cP] = TK

SMC

10,000

RPM

Where: TK = 1.0 from Table C-2 (in Appendix C)

SMC = 10 from Table C-1 (in Appendix C)

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 uid 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 Brookeld technical sales department or your local Brookeld dealer/

distributor with test results to determine the nature of the problem.

EXAMPLE 2: Calculate the acceptable range of viscosity using RVDV-E with Small Sample

Adapter at 10RPM; Brookeld Standard Fluid 12,500 with a viscosity of 12,257

cP at 25°C:

1) Determine full scale range by pressing the “AUTORANGE” key on your instrument, The

display shows 25,000cP. The viscosity is accurate to +/- 500 cP (which is 2% of 25,000

cP).