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  Brookfield Engineering Laboratories, Inc.

Page   25

Manual No. M/85-150-N898

4) The viscosity standard fluid, together with the spindle, should be immersed in the bath for a

minimum of 1 hour, stirring the fluid periodically (operate at 50 or 60 RPM periodically), prior
to taking measurements.

5) After 1 hour, check the temperature of the viscosity standard fluid with an accurate thermometer.

6) If the fluid is at test temperature (

+

/- 0.1

°

C of the specified temperature, normally 25

°

C),

measure the viscosity and record the viscometer reading.

Note:

The spindle must rotate at least five (5) times for one minute, whichever is greater
before readings are taken.

7) The viscosity reading should equal the cP value on the viscosity fluid standard to within the

combined accuracies of the viscometer and the standard (as discussed in the section entitled,
Interpretation of Calibration Test Results).

Calibration Procedure using Cone/Plate Viscometer

1) Ensure that the circulating bath used maintains the stated calibration temperature to within

±

0.1

°

C.

2) The attachment of the cone spindle and sample cup, and the gap setting between the cone and

cup must be accomplished by following "Cone/Plate Rheometer Set Up" Procedure (see
Appendix A).

3) Put the proper amount of viscosity standard fluid into the sample cup.  The amount varies per

cone spindle (refer to Appendix A - "Cone/Plate Rheometer Set Up" procedure, Table A1).

4) Attach sample cup to viscometer and allow approximately 15 minutes for temperature equilib-

rium.

5) Measure the fluid's viscosity and record the viscometer readings (both % torque and cP).

6) See "Interpretation of Test Results" shown below for calculation of total calibration tolerance

(instrument and fluid).

Notes: 1) The spindle must rotate at least (5) times before a viscosity reading is taken.

2) The use of Brookfield Viscosity Standard fluids in the range of 5 cP to 5000 cP is

recommended for cone/plate instruments.  Please contact Brookfield Engineering
Laboratories or an authorized dealer if your calibration procedure requires more
viscous standards.

3) Select a viscosity standard fluid 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 fluid with a viscosity value greater than 5000
cP with a Cone/Plate Viscometer.  Brookfield offers a complete range of mineral oil
viscosity standards suitable for use with Cone/Plate Viscometers as shown in TABLE
D2.  Consult with Brookfield or an authorized dealer to determine which fluid is
appropriate.

Содержание HA

Страница 1: ...NEERING LABORATORIES INC 11 Commerce Boulevard Middleboro MA 02346 1031 USA SPECIALISTS IN THE MEASUREMENT AND CONTROLOF VISCOSITY TEL 508 946 6200 FAX 508 946 6262 or 800 628 8139 USA excluding MA IN...

Страница 2: ...ww ww w 1 17 78 88 8l la ab b c co om m E E m ma ai il l i in nf fo o 1 17 78 88 8l la ab b c co om m L L LA A AB B B O O On n nl l li i in n ne e e E E Ex x xh h hi i ib b bi i it t ti i io o on n n...

Страница 3: ...ood to pass up SPECIAL OFFER Save 450 TEL 508 946 6200 or 800 628 8139 FAX 508 946 6262 www brookfieldengineering com BROOKFIELD ENGINEERING LABORATORIES INC 11 Commerce Boulevard Middleboro MA 02346...

Страница 4: ...Readings and Viscosity Calculations 5 II 3 Considerations for Making Measurements 8 APPENDIX A Cone Plate Viscometer Set Up 9 APPENDIX B Viscosity Ranges 18 APPENDIX C Variables in Viscosity Measurem...

Страница 5: ...spindle at the highest speed the maximum range by using the smallest spindle at the slowest speed There are four basic spring torque series offered by Brookfield Model Spring Torque Dyne cm LV 673 7...

Страница 6: ...aboratory stand Refer to Appendix E 2 Mount the Viscometer securely on a Brookfield laboratory stand On some Viscom eters itmaybenecessarytounscrewthenutlocatedatthepointwherethepowercord entersthevis...

Страница 7: ...set of seven spindles and a wider guard leg HA and HB Viscometers come with a set of seven spindles and no guard leg The spindles are attached to the viscometer by screwing them to the lower shaft Not...

Страница 8: ...or calculating viscosity For maximum accuracy readings below 10 0 torque dial reading should be avoided 5 Turn the viscometer motor switch OFF when changing a spindle changing samples etc Remove spind...

Страница 9: ...10 100 20 100 40 100 100 100 400 1 2 3 4 5 6 7 RV Spindle Speed Factor Spindle HA 5 400 5 1 6M 5 4M 5 8M 5 16M 5 40M 5 160M 1 200 1 800 1 2M 1 4M 1 8M 1 20M 1 80M 2 100 2 400 2 1M 2 2M 2 4M 2 10M 2 4...

Страница 10: ...econd consideration involves the mechanics of fluid flow All rheological measurements of fluid flow properties should be made under laminar flow conditions Laminar flow is flow wherein all particle mo...

Страница 11: ...ometer requires the use of a circulating temperature bath controlling temperature to within 0 1 C The bath is connected to the ports on the CP 44Y sample cup The following example assumes that the C P...

Страница 12: ...mple during the gap setting procedure Figure A3 Start the Viscometer running at 10 or 12 rpm Readings of Torque dial reading will be utilized for setting the cone plate gap If the display reading jump...

Страница 13: ...econds between movements of the ring Turn the adjustment ring until the display reading jumps from 0 0 to 0 5 HA and HB models or from 0 0 to 0 6 RV models or 0 0 to 1 0 LV models This is the HIT POIN...

Страница 14: ...made This will separate the pins by 0 0005 0 013 mm This is a very important step because if it is not done the pins may touch constantly and may cause wear and damage to the cone cup and instrument...

Страница 15: ...s attached Table A1 Cone Sample Volume Cone Angle CP 40 0 5 ml 0 8 CP 41 2 0 ml 3 0 CP 42 1 0 ml 1 565 CP 51 0 5 ml 1 565 CP 52 0 5 ml 3 0 Sample Cup Cone Less than 1 mm Cone Less Than 1 mm Cup Sample...

Страница 16: ...for viscosity ranges of cone spindles Do not use a silicone viscosity standard fluid with a viscosity value greater than 5000 cP with a Cone Plate Viscometer Brookfield offers a complete range of min...

Страница 17: ...okfield Cone Plate Viscometer the mathematical relationships are Shear Stress dynes cm2 Shear Rate sec 1 Viscosity Centipoise mPa s T 2 3 r 3 Sin Shear Stress x 100 Shear Rate Where T Full Scale Torqu...

Страница 18: ...CP 41 CONE CP 52 RPM SEC 1 2 ml SAMPLE 0 5 ml SAMPLE SPEED SHEAR RATE CONE CP 42 CONE CP 51 RPM SEC 1 1 ml SAMPLE 0 5 ml SAMPLE SPEED SHEAR RATE CONE CP 40 RPM SEC 1 0 5 ml SAMPLE 3 0 Cone Spindle 60...

Страница 19: ...0 26 200 0 0 5 3 75 52 400 0 HBTCP Viscometer SPEED SHEAR RATE CONE CP 41 CONE CP 52 RPM SEC 1 2 ml SAMPLE 0 5 ml SAMPLE SPEED SHEAR RATE CONE CP 42 CONE CP 51 RPM SEC 1 1 ml SAMPLE 0 5 ml SAMPLE SPEE...

Страница 20: ...00 200 400 000 18 1 32N 5 500 5 10 000 25 0 22N 800 80 000 800 1 600 000 31 0 34N 50 5 000 50 100 000 34 0 28N 100 10 000 100 200 000 Spindle 1 SEC LVF LVT SSA T Sel Shear Rate Viscosity cP 14 0 40N 6...

Страница 21: ...000 T E 3 900 78 000 3 900 1 560 000 T F 7 800 156 000 7 800 3 120 000 T Bar Spindle LVF LVT Viscosity cP T A 2 000 100 000 2 000 400 000 T B 4 000 200 000 4 000 800 000 T C 10 000 500 000 10 000 2 0...

Страница 22: ...e Independent Pseudoplastic A pseudoplastic material displays a decrease in viscosity with an increase in shear rate and is also known as shear thinning If you take viscometer readings from a low to a...

Страница 23: ...ntrol or specify the following 1 Test temperature 2 Sample container size or spindle chamber geometry 3 Sample volume 4 Viscometer model 5 Spindle used if using LV 1 4 or RV 1 7 attach the guard leg 6...

Страница 24: ...e guard leg attached Brookfield Viscosity Standard Fluid General Information We recommend that Brookfield Viscosity Standard Fluids be replaced on an annual basis one year from date of initial use The...

Страница 25: ...lly 25 C measure the viscosity and record the Viscometer reading Note The spindle must rotate at least five 5 times before readings are taken 7 The viscosity reading should equal the cP value on the f...

Страница 26: ...ith extension link and coupling nut onto the Viscometer 3 Attach the tube to the mounting channel 4 Lower the tube into the water bath reservoir or if using the ULA 40Y water jacket connect the inlet...

Страница 27: ...Up Procedure see Appendix A 3 Put the proper amount of viscosity standard fluid into the sample cup The amount varies per cone spindle refer to Appendix A Cone Plate Rheometer Set Up procedure Table...

Страница 28: ...tandard Fluid 12 500 with a viscosity of 12 257 cP at 25 C 1 Refer to the instructions on the FACTOR FINDER Calculate the full scale viscosity range by multiplying the spindle speed FACTOR by 100 Spin...

Страница 29: ...itions the calculation from instrument torque to viscosity will be incorrect Practically speaking the guard leg has the greatest effect when used with the 1 2 spindles of the LV and RV spindle sets An...

Страница 30: ...Brookfield Engineering Laboratories Inc Page 28 Manual No M 85 150 N898 RV Guardleg LV Guardleg...

Страница 31: ...ew VS 7Y Unpacking Check carefully to see that all the components are received with no concealed damage 1 base 1 jam nut 3 leveling screws 1 clamp assembly 1 upright rod Model A E Clamp Assembly Part...

Страница 32: ...Adjust the instrument level until the bubble is centered from right to left and tighten the Clamp Screw clockwise Note The small clamp adjusting screw Figure E1 on the clamp assembly should be loosene...

Страница 33: ...threads for dirt clean threads on spindle coupling with a 3 56 inch left hand tap Inspect threads for wear if the threads are worn the unit needs service see Appendix G Check to see if spindles rotat...

Страница 34: ...Making Measurements Dial Viscometer Operating Manual Appendix B Viscosity Ranges Dial Viscometer Operating Manual Appendix C Variables in Viscosity Measure ment Perform a calibration check Follow the...

Страница 35: ...void using foam peanuts or shredded paper DO NOT send the laboratory stand unless there is a prob lem with the upright rod clamp or base If there is a problem with the stand remove the upright rod fro...

Страница 36: ...s consult Brookfield Engineering Laboratories Inc or the dealer from whom you purchased the instrument For repair or service in the United Kingdom return to Brookfield Viscometers Limited 1 Whitehall...

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