Brookfield DV1 Viscometer Instrukcja Użytkownika Pobierz pdf (Strona 52)

Brookeld Engineering Laboratories, Inc. Page 52 Manual No. M14-023

5) Measure viscosity and record the viscometer reading; include % and cP (mPa•s). Instrument

accuracy is ± 2% of the maximum viscosity range and not the standard 1%.

Calibration Check Procedure for Cone/Plate Viscometers

1) Follow the procedures outlined in Appendix A for mechanically adjusting the setting of

the cone to the plate.

2) Refer to Appendix A, Table A-1, and determine the correct sample volume required for

the spindle to be utilized.

3) Select a viscosity standard uid that will give viscosity readings between 10% and 100% of

Full Scale Range. Refer to Appendix B for viscosity ranges of cone spindles. Do not use

a silicone viscosity standard uid with a viscosity value greater than 5000 cP with a Cone/

Plate Viscometer. Brookeld oers a complete range of mineral oil viscosity standards

suitable for use with Cone/Plate Viscometers. See Table F-2 in Appendix F. It is best to

use a viscosity standard uid that will be close to the maximum viscosity for a given cone

spindle/speed combination.

DV1MLV Viscometer, Cone CP-42, Fluid 10

Having a viscosity of 9.7 cP at 25°C

At 60 RPM, the Full Scale Viscosity Range is 10.0 cP. us, the Viscometer reading should

be 97% torque and 9.7 cP viscosity ± 0.197 (closer to ±0.2) cP. e accuracy is a combination

of Viscometer and uid tolerance (refer to Interpretation of Calibration Test Results at

the end of this section).

4) With the viscometer stopped, remove the sample cup and place the viscosity standard

uid into the cup.

5) Connect the sample cup to the Viscometer. Allow sucient time for temperature to reach

equilibrium.

6) Measure the viscosity and record the Viscometer reading in both % torque and centipoise.

NOTE: e spindle must rotate at least ve (5) times before readings are taken.

Interpretation of Calibration Test Results:

When verifying the calibration of the DV1, the instrument and viscosity standard uid error must

be combined to calculate the total allowable error.

e DV1 is accurate to (+/-) 1% of any Full Scale spindle/speed viscosity range.

Brookeld Viscosity Standards Fluids are accurate to (+/-) 1% of their stated value.

Calculate the acceptable range of viscosity using DV1MRV with RV-3

Spindle at 2 RPM; Brookeld Standard Fluid 12,500 with a viscosity of

12,257 cP at 25°C:

Example 1:

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 62 63

Brak uwag

Brookfield DV1 Viscometer Instrukcja Użytkownika Strona 52