BROOKFIELD DIGITAL VISCOMETER MODEL DV-I+ Operating Instructions Manual No. M/92-021-O604 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. 11 Commerce Boulevard, Middleboro, MA 02346-1031 USA TEL 800-628-8139 or 508-946-6200 F AX 508-946-6262 www.
TABLE OF CONTENTS I. INTRODUCTION ....................................................................................... 3 I.1 I.2 I.3 I.4 I.5 I.6 I.7 Components ..................................................................................................................... 4 Utilities ............................................................................................................................ 4 Specifications ............................................................................
I. INTRODUCTION The Brookfield DV-I+ 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 DV-I+. The principle of operation of the DV-I+ is to drive a spindle (which is immersed in the test fluid) through a calibrated spring.
I.1 Components Component Part Number DV-I+ Viscometer Model S Laboratory Stand Spindle Set with Case LVDV-I+ set of four spindles or RVDV-I+ set of six spindles (#2 through #7) HA/HBDV-I+ set of six spindles (#2 through #7) Quantity varies Model S varies (SSL) (SSR) (SSH) 1 1 1 1 1 1 For cone/plate versions, a spindle wrench, one cone spindle and sample cup, Part No. CPE-44Y replace the spindle set.
I.3 Specifications Speeds: (rpm) Weight: LVDV-I+: 0.0, 0.3, 0.6, 1.5, 3, 6, 12, 30, 60, 0.0, 0.5, 1, 2, 2.5, 4, 5, 10, 20, 50, 100 RV/HA/HBDV-I+: 0.0, 0.5, 1, 2, 2.5, 4, 5, 10, 20, 50, 100, 0.0, 0.3, 0.6, 1.5, 3, 6, 12, 30, 60 Gross Weight Net Weight Carton Volume 20 lb 17 lb 1.65 cu ft 9 kg 7.7 kg 0.05 m3 Tp Temperature Sensing Range: -100°C to +300°C (-148°F to +572°F) Operating Environment: 0°C to 40°C Temperature Range (32°F to 104°F) 20% - 80% R.H.
Tp 4) Connect the optional RTD temperature probe to the temperature port on the rear panel of the DV-I+, if provided. 5) The Viscometer must be level. The level is adjusted using the two Leveling Screws (VS-3) on the base. Adjust so that the bubble level on top of the DV-I+ is centered within the circle. Check level periodically during use. 6) Make sure that the AC power switch at the rear of the DV-I+ is in the OFF position.
I.6 Key Functions Figure I-1 shows the control keys on the face of the DV-I+ Viscometer. The following describes each key's function. UP ARROW This key is used to scroll UP (in an increasing value direction) through the available speed or spindle tables. MOTOR ON/OFF AUTO RANGE DOWN ARROW SET SPEED SELECT SPINDLE This key is used to scroll DOWN (in a decreasing value direction) through the available speed or spindle tables.
I.7 Cleaning Be sure to remove spindle from instrument prior to cleaning. Severe instrument damage may result if cleaned in place. Instrument and Keypad: Clean with dry, non-abrasive cloth. Do not use solvents or cleaners. Immersed Components (spindles): Spindles are made of stainless steel. Clean with non-abrasive cloth and solvent appropriate for sample material that is not aggressive to immersed components. When cleaning, do not apply excessive force which may result in bending spindles.
II. GETTING STARTED II.1 Auto Zero Before readings may be taken, the Viscometer must be Autozeroed. This action is performed each time the power switch is turned on. The display window on the Viscometer will guide you through the procedure as follows: Turn the power switch (located on the rear panel) to the ON position. This will result in the following screen display: BROOKFIELD DV-I+ RV VISCOMETER Figure II-1 After a few seconds, the following screen appears: BROOKFIELD DV-I+ VERSION 5.
cP 0.0 0.0RPM S01 % 0.0 Spindle Selected (without Temperature Probe) Calculated Viscosity (cP or m•Pas) Speed cP 123E3 70.1°F 0.0RPM % 0.0 Temperature (if available) % Torque (with Temperature Probe) Figure II-5 The display will vary slightly depending upon the status of the last spindle entry. NOTE: If the viscosity value exceeds 99,999, scientific notation is used. In FigureII-5, the viscosity value is 123,000 cP. II.
NOTE: You have approximately three seconds in which to press the SELECT SPINDLE key before the blinking stops. If you fail to press the SELECT SPINDLE key before the blinking stops you will have to repeat the above steps and re-select the desired spindle. The DV-I+ will begin to calculate using the new spindle parameters as soon as the SELECT SPINDLE key is pressed the second time. Tp II.2.
II.3 Speed Selection & Setting Table II-1 shows the available speed selections. DV-I+ SPEEDS SETS LV Beginning 0.0 0.3 When scrolling 0.6 “UP” 1.5 3.0 6.0 12.0 30.0 60.0 0.0 0.5 1.0 2.0 2.5 4.0 5.0 10.0 20.0 50.0 100.0 RV/HA/HB 0.0 0.5 1.0 2.0 2.5 4.0 5.0 10.0 20.0 50.0 100.0 0.0 0.3 0.6 1.5 3.0 6.0 12.0 30.0 60.0 Beginning When scrolling “UP” Table II-1 The DV-I+ may also be programmed with “special” speed sets. A list of special speed sets is included in Appendix F.
DV-I+ is currently running. The user may operate at a given speed and pre-set the DV-I+ to the next desired speed before that speed will be used. For example, if the DV-I+ is currently running at 10 RPM and was previously scrolled to 20 RPM, a single press of either ARROW key would result in the Figure II-9 screen display: Operating Speed cP 872.0 S01 10RPM20 % 87.2 Scrolled to Selected Speed Figure II-9 Pressing the SET SPEED key would cause the DV-I+ to begin running at 20 RPM.
Viscosity CGS cP SI mPa.s II.6 Temperature Display in °F or °C Selection Pressing and holding the DOWN ARROW key during power on will enable the temperature display to be read in either degrees Fahrenheit or degrees Centigrade. To change the units format: 1. Turn the power OFF. 2. Press and hold the DOWN ARROW key and turn power ON. The DV-I+ will retain the unit selection when the viscometer is turned OFF.
II.8 Operation The following procedure is outlined for making a viscosity measurement in a 600 ml low form Griffin beaker. 1. Mount the guardleg on the DV-I+ Viscometer (LV and RV series). Attach the spindle to the lower shaft. Lift the shaft slightly, holding it firmly with one hand while screwing the spindle on with the other (note left-hand thread). Avoid putting side thrust on the shaft. 2.
3. Next, the user selects the spindle number corresponding to the spindle attached. 4. Now, the user presses the MOTOR ON/OFF key to ensure that the motor is OFF. Setting the motor to the OFF condition sets up the viscometer for executing the Timed Modes. 5. The user presses the SET SPEED and SELECT SPINDLE keys simultaneously to enter either of the timed test modes.
3. At this point, the user need only press the MOTOR ON/OFF key to begin the timed stop operation. Any other key will abort the process and the user will have to begin again by simultaneously pressing the SET SPEED and SELECT SPINDLE keys. 4.
TIMED TORQUE SET TORQUE: 00% Figure II-22 Using the UP and DOWN ARROW keys, the user enters a value for the torque level which the viscometer must achieve. This value can be as high as 99%. NOTE: The value for torque must be other than zero or you will not be able to exit this mode. 2.
CP 123456789 TIMED TORQ DONE Figure II-26 The display will switch between that of Figures II-25 and II-26 for each press of either the UP or DOWN ARROW key. Pressing any key except the UP or DOWN ARROW key will cause the viscometer to exit the Timed Torque mode and resume normal operation. NOTE: For the Time to Torque method, the DV-I+ Viscometer will retain the last entered torque in EEPROM for use when the user elects to perform a time to torque test again. Brookfield Engineering Laboratories, Inc.
Appendix A - Cone/Plate Viscometer Set-Up This Cone/Plate version of the DV-I+ uses the same operating instruction procedures as described in this manual. However, the “gap” between the cone and the plate must be verified/adjusted before measurements are made. This is done by moving the plate (built into the sample cup) up towards the cone until the pin in the center of the cone touches the surface of the plate, and then by separating (lowering) the plate 0.0005 inch (0.013mm).
A.2 SETUP 1. 2. 3. Be sure that the Viscometer is securely mounted to the Laboratory Stand, leveled and zeroed with no cone or cup attached and 0% torque is displayed. Bath Outlet Figure A-2 shows a typical water bath setup. Connect the sample cup inlet/outlet ports to the water bath inlet and outlet and set the bath to the desired test temperature. Allow sufficient time for the bath to reach the test temperature.
A.3 SETTING THE GAP 1. Move the toggle switch to the right; this will turn on (enable) the Gap Setting Feature. The Pilot (red) light will be illuminated. 2. If the contact light (yellow) is illuminated, turn the micrometer adjustment ring clockwise (as you look down on the instrument) until the light is just breaking contact, i.e., flickering (see Figure A-5). Moves Away Moves Towards from Hit Point Hit Point (clockwise) (counter-clockwise) LEFTx RIGHT 3.
A.4 VERIFYING CALIBRATION 1. 2. Determine the appropriate sample volume. Refer to Table A-1 to determine the correct sample volume required for the spindle to be utilized. Ta b l e A 6 Cone Part No. CPE-40 CPE-41 CPE-42 CPE-51 CPE-52 Select a Brookfield 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; ranges listed apply to CPE cones.
Appendix B - Viscosity Ranges LV(#1-4) and RV,HA,HB(#1-7) Viscometers Viscosity Range (cP) Viscometer Minimum Maximum LVDV-I+ RVDV-I+ HADV-I+ HBDV-I+ 15 100 200 800 2,000,000 13,300,000 26,600,000 106,400,000 Vane Spindles Spindle Notes: (4) Torque Range Shear Stress Range Pa dyne/cm 2 Viscosity Range cP (mPa•s) @ 10 rpm V-71 V-72 V-73 V-74 (4) RV RV RV .
Small Sample Adapter and Thermosel SSA and Thermosel Spindle SC4-16 SC4-18 SC4-25 SC4-31 SC4-34 SC4-81 SC4-82 SC4-83 SSA and Thermosel Spindle SC4-14 SC4-15 SC4-25 SC4-27 SC4-28 SC4-29 SC4-81 SC4-82 SC4-83 Viscosity (cP) LVDV-I+ 120 3 480 30 60 3 3 11 - 400,000 10,000 - 1,600,000 - 100,000 - 200,000 10,000 10,000 38,000 Shear Rate sec-1 .29N 1.32N .22N .34N .28N 1.29N 1.29N 1.
Spiral Adapter Viscosity (cP) Spiral Spindle LVDV-I+ SA-70 98 - 98,500 RVDV-I+ HADV-I+ Shear Rate sec-1 HBDV-I+ 1,000-1,050,000 2,100-2,100,000 8,400-8,400,000 .00677 .67.7N (1-100 RPM) Cone/Plate Viscometer Shear Rate sec-1 Viscosity (cP) Cone Spindle CPE-40 CPE-41 CPE-42 CPE-51 CPE-52 LVDV-I+ .30 1.15 .60 4.8 9.3 RVDV-I+ - 1,028 3 - 3,840 12 - 2,000 6 - 16,178 51.8 - 31,000 99.2 HADV-I+ - 10,900 7 - 41,000 25 - 21,300 13 - 172,600 103.4 - 330,700 198.
all particle movement is in layers directed by the shearing force. For rotational systems, this means all fluid movement must be circumferential. When the inertial forces on the fluid become too great, the fluid can break into turbulent flow wherein the movement of fluid particles becomes random and the flow can not be analyzed with standard math models.
Appendix C - Variables in Viscosity Measurement 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.
Viscometer Related Variables Most fluid viscosities are found to be non-Newtonian. They are dependent on Shear Rate and the spindle geometry conditions. The specifications of the viscometer spindle and chamber geometry will affect the viscosity readings. If one reading is taken at 2.5 rpm, and a second at 50 rpm, the two viscosity values produced will be different because the readings were made at different shear rates. The faster the spindle speed, the higher the shear rate.
Appendix D - Spindle and Model Codes Each spindle has a two digit code which is scrolled to via the keypad on the DV-I+. The spindle code directs the DV-I+ to calculate viscosity for the spindle that is being used. The spindle multiplyer constant (SMC) is used to calculate full scale viscosity range for any spindle/speed combination (refer to Appendix E). Spindle codes are listed in Table D-1.
Table D-2 lists the model codes and spring torque constants for each viscometer model. VISCOMETER MODEL TORQUE CONSTANT TK MODEL CODE ON DV-I+ SCREEN LVDV-I+ 2.5xLVDV-I+ 5xLVDV-I+ 1/4 RVDV-I+ 1/2 RVDV-I+ RVDV-I+ HADV-I+ 2xHADV-I+ 2.5xHADV-I+ HBDV-I+ 2xHBDV-I+ 2.5xHBDV-I+ 5xHBDV-I+ 0.09373 0.2343 0.4686 0.25 0.5 1 2 4 5 8 16 20 40 LV 4L 5L 1R 2R RV HA 3A 4A HB 3B 4B 5B Table D-2 Brookfield Engineering Laboratories, Inc. Page 31 Manual No.
Appendix E - Calibration Procedures The accuracy of the DV-I+ 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 E-1 (Silicone Oils) and Table E-2 (Mineral Oils).
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. These fluids are either pure silicone or mineral oil and are not subject to change over time. However, exposure to outside contaminants through normal use requires replacement on an annual basis. Contamination may occur by the introduction of solvent, standard of different viscosity or other foreign material.
Calibration Procedure for a Small Sample Adapter When a Small Sample Adapter is used, the water jacket is connected to the water bath and the water is stabilized at the proper temperature: 1) Put the proper amount of viscosity standard fluid into the sample chamber. The amount varies with each spindle/chamber combination. (Refer to the Small Sample Adapter instruction manual.) 2) Place the sample chamber into the water jacket.
Calibration Procedure for UL Adapter When a UL Adapter is used, the water bath is stabilized at the proper temperature: 1) Put the proper amount of viscosity standard fluid into the UL Tube. (Refer to the UL Adapter instruction manual). 2) Attach the spindle (with extension link and coupling nut) onto the DV-I+. 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/outlets to the bath external circulating pump.
Calibration Procedure for a Helipath Stand and T-Bar Spindles T-Bar spindles should not be used for verifying calibration of the DV-I+ Viscometer. When a Helipath Stand and T-Bar spindles are used: Remove the T-bar spindle and select a standard LV(#1-4) or RV,HA,HB(#1-7) spindle. Follow the procedures for LV(#1-4) and RV,HA,HB (#1-7) Brookfield spindles outlined above. Calibration Procedure for Spiral Adapter 1) Place the viscosity standard fluid (in the proper container) into the water bath.
4) With the viscometer stopped, remove the sample cup and place the viscosity standard fluid into the cup. 5) Allow sufficient time for temperature to reach equilibrium, and connect the sample cup to the Viscometer. 6) Measure the viscosity and record the Viscometer reading in both % torque and centipoise. NOTE: The spindle must rotate at least five (5) times before a viscosity reading is taken.
The current guard leg is a band of metal in the shape of the letter U with a bracket at the top that attaches to the pivot cup of a Brookfield Viscometer/Rheometer. Because it must attach to the pivot cup, the guard leg cannot be used with a Cone/Plate instrument. A guard leg is supplied with all LV and RV series instruments, but not with the HA or HB series, or Cone/Plate version.
Appendix F - Special Speed Sets The following special speeds sets are available from Brookfield Engineering Laboratories. All speeds are in units of RPM. RPM Step 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 SPEED SET (RPM) SS200 0.0 1.0 1.4 1.8 2.0 4.0 6.0 8.0 10 20 40 60 80 100 120 140 160 180 200 SS150 0.0 0.8 1.1 1.4 1.5 3.0 4.0 6.0 7.5 15 30 40 60 75 90 105 120 135 150 SS100 0.0 0.5 0.7 0.9 1.0 2.0 3.0 4.0 5.0 10 20 30 40 50 60 70 80 90 100 SS50 0.0 0.2 0.3 0.4 0.5 1.0 1.5 2.0 2.5 5.
Appendix G - Communications DV-I+ with Temperature Option Analog Outputs 1 No Connection 6 Analog Ground (%Torque & Temperature) 2 No Connection 7 Analog % Torque (see Note 1) 3 Connected internally. Do not use. { 8 Analog Temperature - optional (see Note 2) 4 9 5 No Connection NOTES: 1. This is a 0-1 volt d.c. output where 0 volts corresponds to 0% torque and 1 volt corresponds to 100% torque with a resolutuion of 1 millivolt (0.1%). 2. This is a 0-4 volt d.c.
Appendix H - Model S Laboratory Stand with Parts Identification* VS-35Y MODEL S CLAMP ASSEMBLY 7 6 11 8 1 9 10 BROOKFIELD LABORATORY VISCOMETER 2 ITEM 5 1 4 3 2 3 4 5 6 7 8 9 10 11 PART # DESCRIPTION VS-34 VS-38 VS-2 VS-3 50S311824S06B 502020032S34Z VS-35 VS-40Y VS-41Y VS-29 VS-29W VS-28 QTY. 1 14” UPRIGHT ROD 18” UPRIGHT ROD OPTIONAL 1 BASE 2 LEVELING SCREW 1 SCREW, 5/16-18 X 3/4 LG. SLOTTED PAN HD.
Unpacking Check carefully to see that all the components are received with no concealed damage. 1 Base, VS-2, with 2 Leveling Screws, VS-3, packed in a cardboard carton 1 Upright Rod, VS-34, with attached Clamp Assembly, VS-35Y Assembly (Refer to Figure H-1) 1. Remove the base assembly from the carton. 2. Remove the screw and washer from the upright rod. Place the rod and clamp assembly into the hole in the top of the base.
Appendix I - DVE-50A Probe Clip TpProbe Clip DVE-50A is supplied with the DV-I+ Optional Temperature Probe. It is used to attach the RTD temperature probe to the LV/RV Guard Leg or 600 mL low form Griffin beaker. Figure I-1 is a view of the Probe Clip, showing the hole into which the RTD probe is inserted, and the slot which fits onto the LV/RV guard leg. When inserting the RTD probe into the Probe Clip, the upper part of the Clip is compressed by squeezing the points shown in Figure I-1.
Appendix J - Fault Diagnosis and Troubleshooting Spindle Does Not Rotate ❏ ❏ ❏ ❏ Make sure the viscometer is plugged in. Check the voltage rating on your viscometer (115V, 220V): it must match wall voltage. Make sure the power switch is in the ON position. Verify rpm: make sure rotational speed (rpm) has been correctly selected. Spindle Wobbles When Rotating or Looks Bent ❏ Make sure the spindle is tightened securely to the viscometer coupling.
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 ❏ Perform a calibration check. Follow the instructions in Appendix D. • Verify tolerances are calculated correctly. • Verify calibration check procedures were followed exactly. If the unit is found to be out of tolerance, the unit may be in need of service.
Appendix K - Warranty Repair and Service Warranty Brookfield Viscometers are guaranteed for one year from date of purchase against defects in materials and workmanship. They are certified against primary viscosity standards traceable to the National Institute of Standards and Technology (NIST). The Viscometer must be returned to Brookfield Engineering Laboratories, Inc. or the Brookfield dealer from whom it was purchased for no charge warranty service. Transportation is at the purchaser's expense.
a Packaging Instructions to Return a Viscometer for Repair or Calibration ❏ Remove and return all spindles (properly packed for shipping). ❏ Clean excess testing material off the instrument. ❏ Include MSDS sheets for all materials tested with F I G U R E L 1 this instrument. ❏ Support pointer shaft with white, nylon shipping cap, as shown in Figure L1, or elastic band from coupling to mounting rod of viscometer. ❏ Pack the instrument in its original case.
When returning your instrument for repair, please use this VISCOMETER INFORMATION SHEET. Providing us with the following information will help us to service your equipment more quickly and efficiently. Please fill out and return a copy of this form with your instrument. Brookfield recommends that all viscometers be returned for annual calibration to ensure that your equipment continues to provide the same accuracy you have come to expect from Brookfield products.
BY: TEST INFORMATION: SAMPLE MODEL SPINDLE RPM DIAL READING % TORQUE FACTOR VISCOSITY cP SHEAR RATE TEMP °C TIME NOTES Page 49 Manual No. M/92-021-O604 CONCLUSIONS: BROOKFIELD ENGINEERING LABORATORIES, INC. • 11 Commerce Boulevard • Middleboro, MA 02346 • TEL: 508-946-6200 or 800-628-8139 (USA) FAX: 508-946-6262 • www.brookfieldengineering.com Appendix L - Viscosity Test Report Brookfield Engineering Laboratories, Inc.
