BROOKFIELD DIAL VISCOMETER Operating Instructions Manual No. M/85-150-P700 Please record the Model and Serial Number of your viscometer. Having this information readily available will help us to assist you should there be any questions regarding your instrument. Model No. _____________________ Serial No. _____________________ SPECIALISTS IN THE MEASUREMENT AND CONTROL OF VISCOSITY BROOKFIELD ENGINEERING LABORATORIES, INC.
TABLE OF CONTENTS I. INTRODUCTION ................................................................................ 3 I.1 I.2 I.3 I.4 II. Components .................................................................................... 3 Utilities ........................................................................................... 4 Specifications ................................................................................. 4 Set-Up ...............................................................
I. INTRODUCTION The Brookfield Dial Viscometer measures fluid viscosity at given shear rates. Viscosity is a measure of a fluid’s resistance to flow. You will find a detailed description of the mathematics of viscosity in the Brookfield publication “More Solutions to Sticky Problems” a copy of which was included with your Dial Viscometer. The Dial Viscometer rotates a sensing element in a fluid and measures the torque necessary to overcome the viscous resistance to the induced movement.
I.2 Utilities Input Voltage: Input Frequency: Power Consumption: 115 VAC or 230 VAC 50 or 60 Hz Less than 20 WATTS I.3 Specifications Speeds: LVF: LVT: 60, 30, 12, 6 60, 30, 12, 6, 3, 1.5, 0.6, 0.3 RVF: RVT: 20, 10, 4, 2 100, 50, 20, 10, 5, 2.5, 1, 0.5 HAT: HBT: 100, 50, 20, 10, 5, 2.5, 1, 0.5 100, 50, 20, 10, 5, 2.5, 1, 0.5 Accuracy: ± 1% of Full Scale Range in use (See Appendix D for details) Repeatability: ± 0.
II. GETTING STARTED II.1 Operation The Brookfield Viscometer is powered by a precision synchronous motor. Exact speeds of rotation are assured as the motor will turn erratically and spasmodically if synchronization cannot be maintained. Speed changes are affected by a gear train having either four or eight speeds. Maximum speed (RPM) will be set at full clockwise rotation and minimum speed at full counter-clockwise rotation.
fluid surface, and bring the spindle to an upright position and thread onto screw. 3. Lower and center spindle in the test material (600 ml beaker) until the "meniscus" of the fluid is at the center of the immersion groove on the spindle’s shaft. 4. To make a viscosity measurement, turn the motor switch “ON”. This energizes the viscometer drive motor. Allow time for the indicated reading to stabilize.
RV Series Viscometer 1 2 .5 200 1 100 2 50 2.5 40 4 25 5 20 10 10 20 5 50 2 100 1 .5 1 2 2.5 4 5 10 20 50 100 800 400 200 160 100 80 40 20 8 4 3 .5 1 2 2.5 4 5 10 20 50 100 2K 1K 500 400 250 200 100 50 20 10 4 .5 1 2 2.5 4 5 10 20 50 100 5 4K 2K 1K 800 500 400 200 100 40 20 .5 1 2 2.5 4 5 10 20 50 100 6 8K 4K 2K 1.6K 1K 800 400 200 80 40 = Spindle Speed = Spindle .5 1 2 2.5 4 5 10 20 50 100 7 20K 10K 5K 4K 2.5K 2K 1K 500 200 100 .5 1 2 2.
II.3 Considerations for Making Measurements In taking viscosity measurements with the Dial Viscometer there are two considerations which pertain to the low viscosity limit of effective measurement. 1) Viscosity measurements should be accepted within the equivalent % Torque Range from 10% to 100% for any combination of spindle/speed rotation. 2) Viscosity measurements should be taken under laminar flow conditions, not under turbulent flow conditions.
APPENDIX A - Cone/Plate Viscometer Set-Up The Wells-Brookfield Dial Viscometer uses the same operating instruction procedures as described in this manual, however, the gap between the cone and the plate must be mechanically adjusted before measurements are made. This is done by moving the plate (built into the sample cup, Part No. CP-44Y) up towards the cone until two small pins (one in the cone, the second mounted on the plate) contact slightly, and then by separating (lowering) the plate 0.0005inch (0.
Remove the sample cup and attach the cone to the Viscometer (Note: left hand threads), using the spindle wrench to hold the Viscometer shaft (Figure A2). Note: Lift up gently on the spindle wrench. These surfaes must be clean! Spindle Wrench Cone Figure A2 Attach the sample cup and swing the clip under the cup to secure it in place. Take care to avoid hitting the cone with the cup (Figure A3). Note: Do not add test sample during the gap setting procedure.
Index Mark Adjustment Ring Turn Adjusting Ring clockwise until the % torque display is stable at 0.0% Figure A4 Turn the adjustment ring to the right (counterclockwise as you look down on the instrument) in small increments (one or two divisions of the ring) while watching the Viscometer dial (Figure A5). Remember that you are trying to raise the cup so that the pin in the cone touches the pin in the cup.
When you are satisfied the pins are just hitting (by observing acceptable % readings), make a pencil mark on the adjustment ring directly under the index mark on the pivot housing (Figure A6). Index Mark Adjustment Ring Make a pencil mark directly under the index mark Figure A6 Turn the adjustment ring to the left (clockwise as you look down on the instrument) exactly the width of one division from the pencil mark you have just made. This will separate the pins by 0.0005" (0.013 mm).
Each of the five available cones has a specific sample volume, as shown in Table A1. Note that the correct amount of sample fluid should cover the cone face and up over the edge less than 1mm as shown in (Figure A8). Less than 1 mm Cone Sample Cup Figure A8 Notes: a) The cup may be removed without resetting the gap. b) Remove the spindle from the viscometer when you clean it. c) Find the hit point every time the spindle is attached. Table A1 Cone Sample Volume CP-40 CP-41 CP-42 CP-51 CP-52 0.
4) Attach sample cup to viscometer and allow approximately 15 minutes for temperature equilibrium. 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.
The ratio of (ωr) and (c) is a constant for any value of (r). Since (c) is a maximum at cone radius (r), the shear rate is related to (ω) and sin θ. For the Wells-Brookfield Cone/Plate Viscometer, the mathematical relationships are: Shear Stress (dynes/cm2) = T 2/3 π r3 ω Shear Rate (sec-1) = Sin θ Viscosity (centipoise or mPa•s) = Shear Stress x 100 Shear Rate where: T = r = ω = θ = % Full Scale Torque (dyne-cm) Cone Radius (cm) Cone Speed (rad/sec) Cone Angle (degrees) Cone Spindle Angle (deg.
Wells-Brookfield Cone/Plate Viscometer Full Scale Ranges LVTCP VISCOMETER RVTCP VISCOMETER 3.0° CONE SPINDLE Speed (RPM) 60.0 30.0 12.0 6.0 3.0 1.5 0.6 0.3 Shear Rate (sec-1) 120.00 60.00 24.00 12.00 6.00 3.00 1.20 0.60 Speed (RPM) 60.0 30.0 12.0 6.0 3.0 1.5 0.6 0.3 Shear Rate (sec-1) 230.00 115.00 46.00 23.00 11.50 5.75 2.30 1.15 Cone #CP-41 2 ml Sample 19.20 38.40 96.00 192.00 384.00 768.00 1,920.00 3,840.00 3.0° CONE SPINDLE Cone #CP-52 0.5 ml Sample 155.33 310.66 776.64 1,553.30 3,106.60 6,213.
Wells-Brookfield Cone/Plate Viscometer Full Scale Ranges HATCP VISCOMETER HBTCP VISCOMETER 3.0° CONE SPINDLE Speed (RPM) 100.0 50.0 20.0 10.0 5.0 2.5 1.0 0.5 Shear Rate (sec-1) 200.00 100.00 40.00 20.00 10.00 5.00 2.00 1.00 Cone #CP-41 2 ml Sample 245.76 491.52 1,228.80 2,457.60 4,915.20 9,830.40 24,576.00 49,152.00 3.0° CONE SPINDLE Cone #CP-52 0.5 ml Sample 1,966.00 3,932.00 9,830.00 19,660.00 39,320.00 78,640.00 196,600.00 393,200.00 Speed (RPM) 100.0 50.0 20.0 10.0 5.0 2.5 1.0 0.5 1.
APPENDIX B - Viscosity Ranges LV Series Viscometers with Spindles #1 - #4 RV/HA/HB Series Viscometers with Spindles #1 - #7 Viscosity Range (cP) Viscometer Minimum LVF LVT RVF RVT HAT HBT 15 15 100 100 200 800 Maximum 100,000 2,000,000 2,000,000 8,000,000 16,000,000 64,000,000 Small Sample Adapter and Thermosel Viscosity (cP) SSA & T-Sel Spindle 16 18 25 31 34 SSA & T-Sel Spindle 14 15 21 27 28 29 Shear Rate (1/SEC) 0.29N 1.32N 0.22N 0.34N 0.
UL Adapter UL Spindle Viscosity (cP) Shear Rate (1/SEC) YULA-15 or 15Z ULA-DIN-Y 1.22N 1.29N LVT RVT HAT HBT 1.0 - 2,000 6.4 - 2,000 12.8 - 2,000 51.2 - 2,000 1.9 - 3,812 12.2 - 5,000 24.4 - 5,000 97.6 - 5,000 N = RPM Cone/Plate Viscometer Viscosity (cP) Cone Shear Rate Spindle (1/SEC) LVTC/P RVTC/P HATC/P HBTC/P CP-40 7.5N 0.5 - 1,028 3.3 - 6,540 6.6 - 13,080 26.2 52,400 CP-41 2.0N 1.9 - 3,840 12.3 - 24,576 24.6 - 49,152 98.4 - 196,600 CP-42 3.84N 1.0 - 2,000 6.4 - 12,800 12.8 - 25,600 51.
APPENDIX C - Variables in Viscosity Measurements As with any instrument measurement, there are variables that can affect a viscometer measurement. These variables may be related to the instrument (viscometer), or the test fluid. Variables related to the test fluid deal with the rheological properties of the fluid, while instrument variables would include the viscometer design and the spindle geometry system utilized.
A repeatable viscosity test should control or specify the following: 1) 2) 3) 4) 5) 6) 7) Test temperature Sample container size (or spindle/chamber geometry) Sample volume Viscometer model Spindle used (if using LV (#1-4) or RV (#1-7) attach the guard leg) Test speed or speeds (or the shear rate) Length of time or number of spindle revolutions to record viscosity. Brookfield Engineering Laboratories, Inc. Page 21 Manual No.
APPENDIX D - Calibration Procedures The accuracy of the Dial Viscometer is verified using viscosity standard fluids which are available from Brookfield Engineering Laboratories or your local Brookfield agent. Viscosity standards are Newtonian, and therefore, have the same viscosity regardless of spindle speed (or shear rate). Viscosity standards, calibrated at 25°C, are shown in Table D1.
Brookfield Engineering Laboratories does not recertify Viscosity Standard Fluids. We will issue duplicate copies of the Certificate of Calibration for any fluid within two years of the purchase date. Brookfield Viscosity Standard Fluids are reusable provided they are not contaminated. Normal practice for usage in a 600 ml beaker is to return the material from the beaker back into the bottle.
Calibration Procedure for a Thermosel System When a Thermosel System is used, the controller stabilizes the Thermo Container at the test temperature. 1) Put the proper amount of HT viscosity standard fluid into the HT-2 sample chamber. The amount varies with the spindle used. (Refer to the Thermosel instruction manual). 2) Place the sample chamber into the Thermo Container.
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.
D2. Consult with Brookfield or an authorized dealer to determine which fluid is appropriate. TABLE D2 OIL VISCOSITY STANDARD FLUIDS BEL Part No. Viscosity (cP) 25°C B31 B210 B750 B1400 B2000 B11000 B20000 B80000 B200000 B420000 31 210 750 1,400 2,000 11,000 20,000 80,000 200,000 420,000 Interpretation of Calibration Test Results: When verifying the calibration of the Viscometer, the instrument and viscosity standard fluid error must be combined to calculate the total allowable error.
Contact the Brookfield technical sales department or your local Brookfield dealer/distributor with test results to determine the nature of the problem. The Brookfield Guardleg The guard leg was originally designed to protect the spindle during use. The first applications of the Brookfield Viscometer included hand held operation while measuring fluids in a 55-gallon drum. It is clear that under those conditions the potential for damage to the spindle was great.
RV Guardleg LV Guardleg Figure D1 Brookfield Engineering Laboratories, Inc. Page 28 Manual No.
APPENDIX E - Models A & A-E Laboratory Stands VS-35Y UNIVERSAL LAB STAND CLAMP ASSEMBLY 6 5 10 7 1 8 9 BROOKFIELD LABORATORY VISCOMETER VS-17SY UNIVERSAL EX-PROOF CLAMP ASSEMBLY 16 12 14 13 15 2 11 4 3 ITEM PART # 1 2 3 4 5 6 7 8 9 10 11 12 13 VS-20 VS-1 VS-3 VS-21 VS-35 VS-40Y VS-41Y VS-29 VS-29W VS-28 50S103208S25B VSXA-17Y 50S252024E140 UPRIGHT ROD BASE LEVELING SCREW JAM NUT CLAMP GEAR SCREW ASSEMBLY CLAMP SCREW ASSEMBLY TENSION INSERT BELLEVILLE SPRING WASHER TENSION SCREW SCREW, #10
Remove the three (3) leveling screws from the base and discard the packing material. Remove the jam nut from the upright rod. Assembly (Refer to Figure E1) Screw the leveling screws into the base. Insert the threaded end of the upright rod into the hole in the top of the base and attach the jam nut to the rod on the underside of the base. With the rod gear rack facing forward (toward the “V” in the base), gently tighten the jam nut.
APPENDIX F - Fault Diagnosis and Troubleshooting Listed are some of the more common problems that you may encounter while using your Viscometer. Review these items before you contact Brookfield. Spindle Does Not Rotate ❏ Make sure the viscometer is plugged in. ❏ Check the voltage rating on your viscometer (115V, 220V): it must match the wall voltage. ❏ Make sure the power switch is in the ON position. ❏ Make sure the speed set knob is set properly and securely at the desired speed.
Inaccurate Readings ❏ Verify spindle, speed and model selection ❏ Verify test parameters: temperature, container, volume, method. Refer to: • "More Solutions to Sticky Problems"; Section II.2a — Considerations for Making Measurements • Dial Viscometer Operating Manual; Appendix B — Viscosity Ranges • Dial Viscometer Operating Manual; Appendix C — Variables in Viscosity Measurement ❏ Perform a calibration check. Follow the instructions in Appendix D. • Verify tolerances are calculated correctly.
APPENDIX G - Warranty Repair and Service Warranty a Brookfield Viscometers are guaranteed for one year from date of purchase against defects in materials and workmanship. The Viscometer must be returned to Brookfield Engineering Laboratories, Inc. or the Brookfield dealer from whom it was purchased for no charge warranty evaluation service. Transportation is at the purchaser’s expense.
For repair or service in the United States return to: Brookfield Engineering Labs., Inc. 11 Commerce Boulevard Middleboro, MA 02346 U.S.A. Telephone: (508) 946-6200 FAX: (508) 946-6262 For repair or service outside the United States consult Brookfield Engineering Laboratories, Inc. or the dealer from whom you purchased the instrument.
Brookfield Engineering Laboratories, Inc. Page 35 Manual No. M/85-150-P700 MODEL SPINDLE RPM DIAL READING % TORQUE FACTOR BY: VISCOSITY cP SHEAR RATE TEMP °C FOR: TIME NOTES BROOKFIELD ENGINEERING LABORATORIES, INC. • 11 Commerce Boulevard • Middleboro, MA 02346 • TEL: 508-946-6200 or 800-628-8139 • FAX: 508-946-6262 • www.brookfieldengineering.com CONCLUSIONS: SAMPLE TEST INFORMATION: VISCOSITY TEST REPORT DATE: This tear-off sheet is a typical example of recorded test data.
