BROOKFIELD DV-II+Pro Viscometer Operating Instructions Manual No. M03-165-F0612 SPECIALISTS IN THE MEASUREMENT AND CONTROL OF VISCOSITY with offices in : Boston • Chicago • London • Stuttgart • Guangzhou BROOKFIELD ENGINEERING LABORATORIES, INC. 11 Commerce Boulevard, M iddleboro, M A 02346 USA T EL 508-946-6200 F AX 508-946-6262 Brookfield Engineering Labs., Inc. or 800-628-8139 (USA e xcluding MA) INTERNET http://www.brookfieldengineering.com Page 1 Manual No.
Table of Contents I. INTRODUCTION................................................................................................... 5 I.1 Components................................................................................................................................6 I.2 Utilities.......................................................................................................................................8 I.3 Specifications................................................................
IV.3.5 Download a Program................................................................................................40 IV.3.6 Run a Program..........................................................................................................41 V. DVLOADER SOFTWARE................................................................................. 43 V.1 V.2 V.3 V.4 V.5 B.E.V.I.S. Overview.............................................................................................................
I. INTRODUCTION The Brookfield DV-II+Pro 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 science of viscosity in the Brookfield publication “More Solutions to Sticky Problems” a copy of which was included with your DV-II+Pro.
The equivalent units of measurement in the SI system are calculated using the following conversions: Viscosity: Shear Stress: Torque: SI CGS 1 mPa•s = 1 cP 1 Newton/m2 = 10 dyne/cm2 1 Newton/m = 107 dyne/cm References to viscosity throughout this manual are done in CGS units. The DV-II+Pro Viscometer provides equivalent information in SI units. I.1 Components Please check to be sure that you have received all components, and that there is no damage.
COMPONENT DIAGRAM Bubble Level DV-II Pro Viscometer Model S Laboratory Stand Spindle Set Shipping Cap Guard Leg LV Spindle Set shown above Cone/Plate Option Temperature Probe Wrench Temperature Probe Clip Toggle Switch for Electrical Gap Tension Bar Cone Spindle Sample Cup Brookfield Engineering Labs., Inc. Temperature Probe Page 7 Manual No.
I.2 Utilities Input Voltage: Input Frequency: Power Consumption: Power Cord Color Code: 115 VAC or 230 VAC 50/60 Hz 30 VA United States Hot (live) Neutral Ground (earth) Outside United States Black White Green Brown Blue Green/Yellow Main supply voltage fluctuations are not to exceed ±10% of the nominal supply voltage. I.3 Specifications Speeds: Choice of 3 options. Instrument has “Interleaved” speeds when manufactured.
Temperature Accuracy: ±1°C | -100°C to +149°C ±2°C | +150°C to +300°C Operating Environment: 0°C to 40°C temperature range (32°F to 104°F) 20% - 80%R.H.: non-condensing atmosphere Ball Bearing Option: If you ordered the ball bearing suspension system with your new instrument please note the following: 1) The ball bearing suspension in your Brookfield instrument is noted on the serial tag on the back of the head by the letter “B” after the model.
3) Connect the RTD probe to the socket on the rear panel of the DV-II+Pro. 4) The Viscometer must be leveled. The level is adjusted using the two leveling screws on the base. Adjust so that the bubble level on top of the DV-II+Pro is centered within the circle. Note: Check level periodically during use. 5) Remove the shipping cap which secures the coupling nut on the Viscometer to the pivot cup. For Cone/Plate Models, hold the Sample Cup and swing the tension bar away from the bottom of the cup.
In case of emergency, turn off the instrument and then disconnect the electrical cord from the wall outlet. The user should ensure that the substances placed under test do not release poisonous, toxic or flammable gases at the temperatures which they are subjected to during the testing. I.6 Key Functions Figure I-1 shows the control keys on the face of the DV-II+Pro Viscometer. The following describes the function of each key.
SELECT SELECT SPINDLE SPINDLE Initiates spindle selection on the first press and then selects the currently scrolled-to spindle when pressed a second time. PRINT PRINT Selects printing and non-printing modes when a printer is attached. OPTIONS/TAB OPTIONS OPTIONS: TAB TAB: Presents the Options menu, flashing the last escaped option. Toggles between selectable items when indicated, as shown in Figure I-2.
II. GETTING STARTED II.1 Autozero Before readings may be taken, the Viscometer must be Autozeroed. This action is performed each time the power switch is turned on. (Note: If cable DVP-80 is connected for printer or computer communication see section II.9). 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.
The display will vary depending upon the selection of temperature (°F or °C) and units of viscosity (cP or mPa•s). II.2 SELECT SPINDLE Spindle Selection LVDV-II+Pro Viscometers are provided with a set of four spindles and a narrow guardleg; RVDV-II+Pro Viscometers come with a set of six spindles and a wider guardleg; HADV-II+Pro and HBDV-II+Pro Viscometers come with a set of six spindles and no guardleg. (See Appendix F for more information on the guardleg.
Note: The DV-II+Pro will remember the Spindle Entry Code which was in use when the power was turned off. Pressing the SELECT SPINDLE key will temporarily display the current selected spindle code in place of temperature and cause the character S to begin to blink . It will blink for about three seconds.
how to install a Custom Speed Set. To select a Viscometer speed first press either the UP or DOWN arrow keys which will cause the area to the right of RPM to display the currently selected speed. Figure II-8 shows the DV-II+Pro is operating at 6.0 RPM, and the current selected speed is 6.0 RPM. Caution: If you select custom speeds but do not choose any speed values, only zero RPM will be available in the scroll list. CP 123.4 6.0RPM6.0 20.1C % 15.
cP 0.0 OFFRPM 20.1C % 0.0 Figure II-10 Pressing the MOTOR ON/OFF/ESCAPE key again immediately starts the DV-II+Pro running at the last scrolled-to-speed. If you had been running at 12 RPM, pressed MOTOR ON/OFF/ ESCAPE and then re-started the DV-II+Pro by pressing MOTOR ON/OFF/ESCAPE once again, you would again be running at 12 RPM. However, if while the motor was off you had scrolled to a new speed of 0.5 RPM, pressing the MOTOR ON/OFF/ESCAPE key would start the DVII+Pro running at 0.5 RPM. Note: II.
SR 40.0 6.0RPM 20.1C % 15.6 Figure II-13 One more press of the SELECT DISPLAY key would result in a return to the viscosity screen, as shown in Figure II-11. Note: 1. 2. You may step through the display at any time. This will not interrupt any Viscometer calculations that are in progress. Display of shear rate and shear stress requires selection of appropriate spindles. Otherwise, values displayed will be zero (0). Refer to Appendix D.
II.6 Out of Range The DV-II+Pro gives indications for out-of-range operation. When % (Torque) readings exceed 100% (over-range), the display changes to that shown in Figure II-15; EEEE will also appear in the display for shear stress: cP EEEE 10 RPM 20.1C % EEEE Figure II-15 You must change either speed or spindle to correct this condition. If you operate at spindle speeds that produce % (Torque) below 10.
II.7 Temperature Display The DV-II+Pro displays the measured temperature when an RTD temperature probe is connected. Temperature may be displayed in either ˚C (Centigrade) or ˚F (Fahrenheit) units, depending upon selection from the Options menu. As received, the default temperature display will be in ˚C (Centigrade) as shown in the Figure II-19: CP 123.4 10 RPM 20.1C % 19.
To stop continuous printing, press the PRINT key for one (1) second. The flashing P will disappear on the viscometer display. Figure II-21 is an example of the print strings for CGS and SI units. For the case of CGS units with non-exponential results: 1 10 20 30 40 RPM=XXX M=XXXXX S=XX %=XXX.X cP=XXXXX and CGS units with exponential results. 1 10 20 30 D/CM2=XXXXX 40 RPM=XXX M=XXXXX S=XX %=XXX.X cP=XXXeX 50 and SI units with exponential results. 1 10 20 30 40 60 60 RPM=XXX M=XXXXX S=XX %=XXX.
The DV-II+Pro may be set to stand alone mode by turning it OFF and ON again and selecting “Stand Alone” or by removing the DVP-80 cable prior to turning the DV-II+Pro on. Note: The DV-II+Pro cannot communicate with DVLOADER software in the external control mode. Choose “Stand Alone” when presented with Figure II-23 if you want to use DVLOADER. For information on controlling the DV-II+Pro from Rheocalc software, check the HELP menu within Rheocalc. II.
maximum accuracy, readings below 10% should be avoided. Record values. 4. Press the MOTOR ON/OFF/ESCAPE key and turn the motor “OFF” when changing a spindle or changing samples. Remove spindle before cleaning. 5. Interpretation of results and the instrument’s use with non-Newtonian and thixotropic materials is discussed in the booklet, “More Solutions to Sticky Problems”, and in Appendix C, Variables in Viscosity Measurements. II.
III. MAKING VISCOSITY MEASUREMENTS III.1 Quick Start The DV-II+Pro Viscometer uses the same methodology for viscosity measurements as the Brookfield Dial Reading Viscometers and DV series of Digital Viscometers. If you have experience with other Brookfield equipment, this section will give you quick steps for taking a viscosity reading. If you have not used a Brookfield Viscometer before, skip this section and go to Section III.2 for a detailed description.
Please see our publication, “More Solutions to Sticky Problems”, for more detail relating to sample preparation. III.3 Selecting a Spindle/Speed The DV-II+Pro has the capability of measuring viscosity over an extremely wide range. For example, the RVDV-II+Pro can measure fluids within the range of 100-40,000,000 cP. This range is achieved through the use of several spindles over many speeds. See Appendix B for details.
IV. OPTIONS IV.1 OPTION TAB F Introduction to OPTIONS The OPTIONS/TAB key provides access to the configuration (Setup) of the DV-II+Pro Viscometer as well as special functions that can enhance the user’s ability to make viscosity measurements. The Options menu, shown in Table 1, gives a complete picture of the various configuration choices and special functions.
ENTER AUTO RANGE MOTOR ON/OFF ESCAPE ENTER/AUTORANGE - Accepts the currently flashing option and moves user to the next level (if applicable) of the selected option. MOTOR ON/OFF/ESCAPE - Cancels current operation and backs user out one menu level. Repeated pressing will back the user out to the default screen.
On entry to the Options menu, the following rules regarding current viscometer operation are in force: 1. Printer output will be suppressed when in the Custom Speed option, the Time to Torque and Time to Stop options, the Download A Program and Run A Program options. It will be continued when any other option is selected. 2. If the motor is ON when the user enters the Options menu, choices will be limited to: CGS/SI units (under SETUP), °F/°C units (under SETUP), PRINTING SELECTIONS and PC PROG. 3.
$ D°F(FAHRENHEIT) DCGS UNITS # $ 1 D°C(CENTIGRADE) DCGS UNITS # $ # $ 1 D°F(FAHRENHEIT) DSI UNITS # $ # $ 1 DCGS UNITS DINTERLEAVE # $ # $ 1 DSEQUENTIAL DPRINT PARALLEL # $ 2 D°F(FAHRENHEIT) DCGS UNITS £ 2 DCGS UNITS DSEQUENTIAL 1 DCGS UNITS # DCUSTOM SPEEDS$ 2 £ DSEQUENTIAL DPRINT SERIAL 2 DPRINT SERIAL DDATA AVERAGING # $ OPTION TAB F # Figure IV-3 IV.2.1 Temperature Display The DV-II+Pro viscometer can display temperature in either degrees Centigrade or degrees Fahrenheit.
D°F(FAHRENHEIT) DCGS UNITS # $ " D°C(CENTIGRADE) DCGS UNITS # $ Figure IV-5 To select the temperature display mode, press the ENTER/AUTORANGE key. You automatically exit the Setup menu with the viscometer displaying temperature in the selected scale. You must press the ENTER/AUTORANGE key to select the flashing option. IV.2.2 Units of Measurement Selecting units of measurement is identical to that for temperature described above.
AUTORANGE key to select the flashing option. DCGS UNITS DSEQUENTIALê # $ 1 DCGS UNITS DINTERLEAVE # $ 1 DCGS UNITS DCUSTOM SPEEDSê # $ É Figure IV-9 The speeds available in each of the above options are listed in Appendix G. The DV-II+Pro is initially set up with the Sequential Speed Set at Brookfield prior to shipment. IV.2.3.1 LV/RV Speeds In the case of Sequential or Interleave, a press of the ENTER/AUTORANGE key immediately selects that option and exits the SETUP option menu. IV.2.3.
Pressing the OPTIONS/TAB key “toggles” between the two port choices. To select a printer output port, press the ENTER/AUTORANGE key while the desired choice is blinking. This will cause the DV-II+Pro to direct all further printer output to the chosen port while remaining in the Setup menu. You must press the ENTER/AUTORANGE key to select the flashing option. IV.2.5 Data Averaging You must press the ENTER/AUTORANGE key to select the flashing option.
IV.3 Time Modes The Time Modes are provided to allow more flexibility by unattended operating of the viscometer during data gathering. The last selected option (i.e.
TIMED STOP SET SEC’S: ↑↓ 00 Figure IV-17 Using the UP and DOWN ARROW keys, the user enters a value for the seconds portion of the time ramp. This value will be from zero (0) up to fifty-nine (59) seconds. Press ENTER to accept the value. Note: The value for either minutes or seconds must be other than zero or you cannot advance to the RPM input screen (Figure IV-18).
cP 123.5e6 MIN: 15 SEC: 13 Figure IV-20 Note: When this mode has begun, a press of the MOTOR ON/OFF/ESCAPE key will cancel the Timed Stop sequence and return the user to the screen of Figure IV-14. Also note that data will be displayed in the currently selected method i.e. CGS or SI units. Pressing the SELECT DISPLAY key allows display of alternate data values such as Shear Stress, Shear Rate or Torque. The seconds display will decrement from fifty-nine (59) to zero (0) in one (1) second intervals.
IV.3.2 Time to Torque On entry to this mode, the user is presented with the following screen display: TIMED TO TORQUE SET TORQUE:00% ↑↓ Figure IV-23 Using the UP or DOWN ARROW keys, the user enters a value for the torque level that you wish to reach. Note: The value for torque must be other than zero (0) and less than or equal to ninety-nine (99) percent or you will not be able to continue.
TORQUE = 24.2% MIN: 15 SEC: 13 Figure IV-26 Note: When this mode has begun, a press of the MOTOR ON/OFF/ ESCAPE key will cancel the time to torque sequence and return the user to the screen of Figure IV-14. The seconds display will increment from zero (0) to fifty-nine (59) in one (1) second intervals and the current value of the viscometer torque will be updated continuously. When seconds reaches fifty-nine (59), the minutes value will increment by one (1) minute.
print mode and finally initiate either of the timed modes of operation. While setting up the timed mode parameters, continuous print operation will cease. However, upon starting the timed operation, the DV-II+Pro will output an initial data string to the printer and then continue printing data strings (at the user defined time interval) for the duration of the timed run.
Activating print selections in the Print mode can only be done by exiting to the main menu and pressing the PRINT key for four (4) seconds. “P%” will flash in front of the torque reading, confirming that you are now in the Print Interval mode. Pressing PRINT for one (1) second thereafter will disable the Print mode and remove the “P%” from the display. IV.3.4 PC Program (On/Off) Note: This option does not apply to use with RHEOCALC software.
IV.3.5 Download a Program Please refer to Section V for details on how to create a program before proceeding with this section. In the Options menu, scroll to the screen shown in Figure IV-34: D PC PROG OFF DOWNLOAD A PROG # $ Figure IV-34 Refer to Section IV for information on how to create B.E.V.I.S. programs on a PC which can be downloaded to the DV-II+Pro Programmable Viscometer. Press the ENTER/AUTORANGE key to download a B.E.V.I.S.
A press of any key (except the MOTOR ON/OFF/ESCAPE key) will take the user back a level to Figure IV-34 where you may elect to download another program or, with a press of the MOTOR ON/OFF/ ESCAPE key, return to the screen of Figure IV-33. IV.3.6 Run a Program In the Options menu, scroll to the screen shown in Figure IV-38: DOWNLOAD A PROG RUN A PROG # $ Figure IV-38 Press the ENTER/AUTORANGE key to run a B.E.V.I.S.
where the operator is instructed to mount a spindle 31 and then press a key to continue. Or you might see: SET TEMP TO 100C PRESS A KEY Figure IV-42 followed by: WAIT TEMP 100C P1 S00/12 00:14 Figure IV-43 Here, the B.E.V.I.S. program is waiting for the temperature to reach one hundred (100) °C before it continues to the next program step. Also displayed is the program number (P1), the step number and the total program steps (S00/12) and the elapsed time since the program (or step) began (00:14).
V. DVLOADER SOFTWARE The DVLOADER software is a WINDOWS-based program provided on a CD which comes with the Programmable DV-II+Pro Viscometer. V.1 B.E.V.I.S. Overview DVLOADER utilizes B.E.V.I.S. (Brookfield Engineering Viscometer Instruction Set), a scripting language that allows for the creation of programs to control the Programmable DV-II+Pro Viscometer. Programs are created on a PC, then loaded into the viscometer using the DVLoader software.
SSP Two digit spindle code STZ N/A PDN N/A PLN 16 character (or less) text message Calculations of viscosity, shear stress, and shear rate are performed based on the specified spindle code. This command overrides the spindle currently entered via the keypad on the DV-II+Pro. Sets the data print timer clock back to zero. The DV-II+Pro immediately prints a data string to the se- lected printer (serial or parallel; as selected in the DV-II+Pro menus).
1 SSN 50.0 2 WTI 00:30 3 SPI 00:05 4 WPT 75 .0 5 SSN 25.0 6 WTI 00:10 7 WPT 75 .0 8 SSN 0.0 9 10 11 12 13 Figure IV-2 shows the grid where the operator programs are created. It is used to view and edit the B.E.V.I.S. programs. When the software starts, an empty grid appears on the left of the screen. You can choose up to 25 commands for your program.
Click the Delete button to delete the B.E.V.I.S. command in the selected row of the program grid. Click the Up button to move the B.E.V.I.S. command in the selected row of the program grid up one row. Click the Down button to move the B.E.V.I.S. command in the selected row of the program grid down one row. Click the Clear button to clear the grid of all B.E.V.I.S. commands. Once cleared, the commands cannot be retrieved. Downloads a B.E.V.I.S.
V.5 Example Programs The following example programs can also be found on the DVLoader disk that was included with the DV-II+Pro Programmable Viscometer: Program 1: Pre-Shear Command Command Description PLN Print text now SSN Set viscometer speed WPT Wait for % torque PLN Print text now SPI Set print interval SSN WTI Set viscometer speed Wait for time interval Parameter Preshearing now 50.0 90.0 Collecting data 00:10 10.
Command WPT Command Description Wait for % torque Parameter 85.
VI. AUTOMATED DATA GATHERING & ANALYSIS There are two choices of applications software that can be purchased from Brookfield or an authorized dealer for this purpose: 1. WINGATHER is a data gathering program which collects data output from the DV-II+Pro and provides the capability to perform graphical analysis and data file management. 2.
Figure V1-2: Gather Screen Figure V1-3: DV Loader Screen Brookfield Engineering Labs., Inc. Page 50 Manual No.
Figure V1-4: Run/Data Screen Figure V1-5: Analysis Screen Brookfield Engineering Labs., Inc. Page 51 Manual No.
Figure V1-6: Setup Screen Figure V1-7: Custom Screen Brookfield Engineering Labs., Inc. Page 52 Manual No.
V1.2 Rheocalc Important features and benefits in Rheocalc which enhance operator versatility in performing viscosity tests include the following: • Rheocalc version 3.
Figure V1-9: Test Screen Figure V1-10: Run/Data Screen Brookfield Engineering Labs., Inc. Page 54 Manual No.
Figure V1-11: Setup Screen Figure V1-12: Analysis Screen Brookfield Engineering Labs., Inc. Page 55 Manual No.
Figure V1-13: Custom Screen V1.3 Math Models Note: Some or all of these models are available in Wingather or Rheocalc. Math models provide parameters that indicate how materials will behave in various circumstances where shear stress and shear rate vary. The data and calculated model parameters can be used to help QC and R&D characterize how a product will behave for the customer and how it will behave during processing.
V1.3.1 The Power Law (Ostwald) Model τ= k n ( τ = shear stress, k = consistency index, = shear rate, and n = flow index) What does it tell you? The Power Law model provides a consistency index, k, which is a product’s viscosity at one reciprocal second. (Reciprocal seconds are the units of measurement for shear rate.) It also provides a flow index, n, which indicates the degree with which a material exhibits non-Newtonian flow behavior. Since Newtonian materials have linear shear stress vs.
An Example of the Power Law Model at Work Formulators at a personal care company would like to use a substitute ingredient to decrease cost. They use the Power Law model to evaluate the effect the new ingredient will have on the behavior of their shampoo. They need to know how it will behave during processing and how it will behave when it is being used be the consumer Shampoo Flow Index (n) = 0.08 Consistency Index (k) = 91071cP With the new ingredient the shampoo has a flow index (n) of 0.08.
When should you use it? Figure V1-15 The Herschel-Bulkley model should be used with non-Newtonian, time-dependent materials that have a yield stress. Products with a yield stress only begin to flow after a certain amount of shear stress is applied. As a result, the flow curve intersects the y-axis at a point greater than 0. After yielding, the product creates a flow curve and behaves as a Power Law fluid so that n indicates where there is a shear-thinning or shear-thickening tendency.
V1.3.3 The Bingham Model τ = τ° + hD ( = shear stress, τ° = yield stress, h = plastic viscosity, and D = shear rate) What does it tell you? The Bingham model indicates a product’s yield stress, τ° , which is the amount of shear stress required to initiate flow. It also provides the plastic viscosity, h, which is the viscosity after a product yields.
An Example of the Bingham Model at Work A manufacturer of drilling fluid applies the Bingham Model to ensure the quality of their product. Results from a recent batch, shown in Figure VI-3, showed that the yield stress and plastic viscosity were both below the pass/fail criteria, which would cause the fluid to insufficiently hold-up the cuttings. The shipment was cancelled and the root-cause of the problem was identified. V1.3.4 Drilling Fluid Plastic Viscosity (h) = 6621 cP Yield Stress (τ ) = 166.
When should you use it? The Casson model should be used with non-Newtonian materials that have a yield stress and that do not exhibit a “Newtonian-like” behavior once they begin to flow. This model is most suitable for fluids that exhibit Pseudoplastic or shear thinning, flow behavior after yielding. These fluids have a non-linear flow curve. The point at which it crosses the y-axis is the product’s yield stress (τ ).
V1.3.5 Other Common Rheological Models The NCA/CMA Casson Model (1 + a) √τ = 2√τ + (1 + a) √ηγ⋅ ° ( τ = shear stress, τ ° = yield stress, h = plastic viscosity, and = shear rate) The NCA/CMA Casson model is designed by the National Confectioners Association and the Chocolate Manufacturers Association as the standard rheological model for the industry.
This model is a variation of the Power Law Model. Unlike the Power Law Model, which relates apparent viscosity to shear rate, the IPC Paste Model relates apparent viscosity to the testing speed (rpm). Figure V1-20 Figure V1-21 Brookfield Engineering Labs., Inc. Page 64 Manual No.
Appendix A - Cone/Plate Viscometer Set-Up This Cone/Plate version of the DV-II+Pro 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. 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 2. 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. 3.
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. Note: The motor should be OFF. 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 no longer illuminated (see Figure A-5). 3.
A.4 Verifying Calibration 1. Determine the appropriate sample volume. Refer to Table A-1 to determine the correct sample volume required for the spindle to be utilized. 2. 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. Brookfield uses mineral oil viscosity standard fluids to calibrate Wells Brookfield Cone/Plate Viscometers at the factory.
Appendix B - Viscosity Ranges Viscosity Range Tables Viscosity ranges shown are for operational speeds 0.1 through 200 rpm.
UL Adapter Viscosity (cP) UL Spindle YULA-15 or 15Z Shear Rate sec-1 LVDV-II+ RVDV-II+ HADV-II+ HBDV-II+ 1 - 2,000 3.2 - 2,000 6.4 - 2,000 25.6 - 2,000 1.22N HBDV-II+ Shear Rate sec-1 DIN Adapter Accessory DAA Spindle Viscosity (cP) LVDV-II+ RVDV-II+ HADV-II+ 85 0.6 - 5,000 6.1 - 5,000 12.2 - 5,000 48.8 - 5,000 1.29N 86 1.8 - 10,000 18.2 - 10,000 36.5 - 10,000 146 - 10,000 1.29N 87 5.7 - 50,000 61 - 50,000 121 - 50,000 485 - 50,000 1.
Vane Spindles Spindle Torque Range V-71 Shear Stress Range (Pa) Viscosity Range cP (mPa·s) NOT RECOMMENDED FOR USE ON LV TORQUE V-72 LV .188-1.88 104.04-1.04K V-73 LV .938-9.38 502-5.02K V-74 LV 9.38-93.8 5.09K-50.9K V-75 LV 3.75-37.5 1.996K-19.96K V-71 RV .5-5 262-2.62K V-72 RV 2-20 1.11K-11.1K V-73 RV 10-100 5.35K-53.5K V-74 RV 100-1K 54.3K-543K V-75 RV 40-400 21.3K-213K V-71 HA 1-10 524-5.24K V-72 HA 4-40 2.22K-22.2K V-73 HA 20-200 10.
Special Considerations In taking viscosity measurements with the DV-II+Pro 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. The first consideration has to do with the precision of the instrument.
sample introduction techniques. The effect of these elements on measurement tolerance must be considered when verifying the calibration of your Brookfield viscometer. Sample temperature in all test circumstances is very important, and will also add an additional expanded tolerance depending on the temperature control system and the calibration verification tests begin with the standard viscometer spindles as detailed above.
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.
The shear rate of a given measurement is determined by: the rotational speed of the spindle, the size and shape of the spindle, the size and shape of the container used and therefore the distance between the container wall and the spindle surface.
Appendix D - Spindle and Model Codes Each spindle has a two digit entry code which is entered via the keypad on the DV-II+Pro. The entry code allows the DV-II+Pro to calculate Viscosity, Shear Rate and Shear Stress values. Each spindle has two constants which are used in these calculations. The Spindle Multiplier Constant (SMC) used for viscosity and shear stress calculations, and the Shear Rate Constant (SRC), used for shear rate and shear stress calculations.
SPINDLE ENTRY CODE SMC SRC T-D 94 200 0 T-E 95 500 0 T-F 96 1000 0 ULA 00 0.64 1.223 DIN-81 81 3.7 1.29 DIN-82 82 3.75 1.29 DIN-83 83 12.09 1.29 DIN-85 85 1.22 1.29 DIN-86 86 3.65 1.29 DIN-87 87 12.13 1.29 SC4-14 14 125 0.4 SC4-15 15 50 0.48 SC4-16 16 128 0.29 SC4-18 18 3.2 1.32 SC4-21 21 5 0.93 SC4-25 25 512 0.22 SC4-27 27 25 0.34 SC4-28 28 50 0.28 SC4-29 29 100 0.25 SC4-31 31 32 0.34 SC4-34 34 64 0.
Table D-2 lists the model codes and spring torque constants for each Viscometer model. Table D-2 MODEL TK MODEL CODE ON DV-II+ SCREEN LVDV-II+ 0.09373 LV 2.5LVDV-II+ 0.2343 2.5 LV 5LVDV-II+ 0.4686 5 LV 1/4 RVDV-II+ 0.25 0.25 RV 1/2 RVDV-II+ 0.5 0.5 RV RVDV-II+ 1 RV HADV-II+ 2 HA 2HADV-II+ 4 2 HA 2.5HADV-II+ 5 2.5 HA HBDV-II+ 8 HB 2HBDV-II+ 16 2 HB 2.5HBDV-II+ 20 2.
Appendix E - Calibration Procedures The accuracy of the DV-II+Pro 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). For more help you can go to the website, www.brookfieldengineering.
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 pure silicone 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 Brookfield recommends a two step check. First verify the calibration of the viscometer using the standard viscometer spindles (LV #1-3, RV #2-6, HA #2-6 and HB #2-6 or cone/plate spindles) as detailed in this appendix. Second verify the calibration of the viscometer using the Small Sample Adapter. The use of an accessory device may increase the accuracy of measurement associated with the DV-II+Pro.
When a UL or DIN 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-II+Pro. 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 Cone/Plate Viscometers 1) Follow the above procedures for mechanically adjusting the setting of the cone spindle to the plate. 2) Refer to Appendix A, Table A-1, and determine the correct sample volume required for the selected spindle. 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.
Sample Adapter, UL Adapter, Thermosel, Spiral Adapter, and DIN Adapter the accuracy value may be increased. In general the increase in accuracy will be minimal, however, it could be as much as 1% for a total accuracy of +/- 2% of the range in use. Brookfield Viscosity Standards Fluids are accurate to (+/-) 1% of their stated value.
2) The Viscosity Standard Fluid is 101.5 cP. Its accuracy is: +/- 1% x 101.5 cP = +/- 1.015 cP or roughly +/- 1.0 cP for further calculations. 3) Total accuracy is the sum of the values n (1) and (2): At 6 RPM, accuracy is: 15.6 cP + 1.0 cP = +/- 16.6 cP At 12 RPM, accuracy is: 7.8 cP + 1.0 cP = +/- 9.8 cP At 30 RPM, accuracy is: 3.1 cP = 1.0 cP = +/- 4.
Appendix F - 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. Original construction included a sleeve that protected the spindle from side impact.
should be known that this type of torque reading will not convert into a correct centipoise value when using a Brookfield factor if the boundary conditions are not those specified by Brookfield. The guard leg is a part of the calibration check of the Brookfield LV and RV series Viscometer/Rheometer. Our customers should be aware of its existence, its purpose and the effect that it may have on data.
Appendix G - Speed Sets The following speed sets and custom speeds are selectable from the SETUP menu option. All speeds are in units of RPM. Interleave Speed Sequential From Speed 0.0 Custom From 0.0 Speed Speed Speed 0.0 3.0 100.0 0.01 4.0 105.0 0.3 LVT 0.3 LVT 0.5 RVT 0.6 LVT 0.03 5.0 120.0 0.6 LVT 1.5 LVT 0.05 6.0 135.0 1.0 RVT 3.0 LVT 0.07 7.5 140.0 1.5 LVT 6.0 LVT 0.09 8.0 150.0 2.0 RVF 12.0 LVT 0.1 10.0 160.0 2.5 RVT 30.0 LVT 0.2 12.0 180.
Appendix H - Communications When using the Brookfield Computer Cable (Brookfield part # DVP-80), the DV-II+Pro will output a data string at a rate of approximately 3 times per second. When using the Brookfield Printer Cable (Brookfield Part No. DVP-81), the output rate is 1.0 times per second.
DV-II+ Serial and Analog Outputs 1 No Connection No Connection 6 Analog Ground 2 7 3 Transmit Data (TxD) High Speed Print (Note 1) Serial Ground 8 4 9 Analog % Torque (Note 2) Analog Temperature (Note 3) High Speed Print (Note 1) 5 Figure H-1 Notes: 1. Placing a jumper across pins 4 and 9 causes the DV- II+ to output computer data at a 3 line-per -second rate. No jumper across pins 4 and 9 retains the once-per-second printer output rate. 2. This is a 0-1 volt d.c.
Appendix I - Model S Laboratory Stands 1 CLAMP ASSEMBLY NOTE: “FRONT” FACES TOWARD YOU. Up/Down Knob BROOKFIELD LABORATORY VISCOMETER CLAMP KNOB TENSION SCREW GEAR RACK 2 5 4 3 ITEM 1 2 3 4 5 PART # VS-CRA-14S VS-CRA-18S VS-2Y VS-3 50S311832S01B 502028071S33B DESCRIPTION 14” UPRIGHT ROD AND CLAMP ASSEMBLY 18” UPRIGHT ROD AND CLAMP ASSEMBLY BASE, includes 2 VS-3 leveling screws LEVELING SCREW available separately or in assembly above SCREW 5/16 X 1” Hex Head FLAT WASHER 5/16 X 7/8 X .071 QTY.
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 with attached Clamp Assembly in the instrument case Assembly (Refer to Figure I-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. Note: The “Front” designation on the clamp assembly should face toward you.
Appendix J - DVE-50A Probe Clip Probe Clip DVE-50A is supplied with all model DV-II+Pro Viscometers, DV-III Rheometers, and Digital Temperature Indicators. It is used to attach the RTD temperature probe to the LV Guard Leg (Part No. B-20Y) or 600 ml low form Griffin beaker. Figure J-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 guard leg.
Appendix K -Fault Diagnosis and Troubleshooting Listed are some of the more common problems that you may encounter while using your Viscometer. ❏ Spindle Does Not Rotate ✓ Make sure the viscometer is plugged in. ✓ Check the voltage rating on your viscometer (115, 220V); it must match the wall voltage. ✓ Make sure the motor is ON and the desired rpm is selected. ❏ Zero RPM is the Only Available Speed ✓ Check speed set selection (section IV.2.3).
❏ Viscometer Will Not Return to Zero ✓ Viscometer is not level • Check with spindle out of the sample • Adjust the laboratory stand ✓ Pivot point or jewel bearing faulty • Perform an Oscillation Check* ✓ Remove the spindle and turn the motor OFF; select display to % torque mode. ✓ Gently push up on the viscometer coupling. ✓ Turn the coupling until the digital display reads 10-15 on the % display. ✓ Gently let go of the coupling.
❏ Recorder Pen Moves in Wrong Direction ✓ Output polarity reversed • Reverse leads ❏ Viscometer Wil Not Communicate with PC ✓ Check the comm port and make sure the correct port is being utilized. ✓ Check the interconnecting cable for proper installation ✓ Check the Options menu and make sure the PC PROG is set to either “ON” or “OFF” in accordance with the operating instructions for the program/procedure in use.
Timed Stop Minutes Seconds RPM Time to Torque Torque % RPM Print Interval Minutes Seconds Printer Port Parallel or Serial Last Spindle used Special Spindle AA SMC Special Spindle AA SRC Special Spindle BB SMC Special Spindle BB SRC Special Spindle CC SMC Special Spindle CC SRC Special Spindle DD SMC Special Spindle DD SRC Display Units Temperature Scale Speed Set Viscometer Model Last BEVIS Program Raw Temps Torque Scale 01 30 50 60 50 00 05 Parallel 05 0000.000 00.000 0000.000 00.
Appendix L - Instrument Dimensions 7 15/16” [20.2 cm] 13 21/64” [33.9 cm] DV-II+ PRO VISCOMETER 6 63/64” [17.7 cm] 4 9/64” [10.5 cm] 15 41/64” [39.7 cm] B-21Y RV GUARD LEG ASSEMBLY 16 31/64” [41.9 cm] 7 63/64” [20.3 cm] 3 3/16” [8.1 cm] 11 3/16” [28.4 cm] Brookfield Engineering Labs., Inc. VS-2Y LAB STAND BASE ASSEMBLY Page 98 Manual No.
Appendix M - Online Help and Additional Resources www.brookfieldengineering.com** The Brookfield website is a good resource for additional and self-help whenever you need it. Our website offers a selection of “how-to” videos, application notes, conversion tables, instructional manuals, material safety data sheets, calibration templates and other technical resources. http://www.youtube.com/user/BrookfieldEng Brookfield has its own YouTube channel.
Appendix N - 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.
MODEL SPINDLE RPM DIAL READING % TORQUE BY: DATE: FACTOR VISCOSITY SHEAR cP RATE TEMP °C FOR: TIME NOTES BROOKFIELD ENGINEERING LABORATORIES, INC. • 11 Commerce Blvd. • Middleboro, MA 02346 • TEL: 508-946-6200 or 800-628-8139 FAX: 508-946-6262 • www.brookfieldengineering.com • VTR1207 CONCLUSIONS: SAMPLE TEST INFORMATION: VISCOSITY TEST REPORT This tear-off sheet is a typical example of recorded test data.
