Brookfield DV2T Operating Instructions Manual
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Brookfield DV2T Operating Instructions Manual

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BROOKFIELD DV2T
Viscometer

Operating Instructions

Manual No. M13-167
Boston • Chicago • London • Stuttgart • Guangzhou
with offices in:
BROOKFIELD ENGINEERING LABORATORIES, INC.
11 Commerce Boulevard, Middleboro, MA 02346 USA
T
508-946-6200
800-628-8139 (USA excluding MA)
or
EL
F
508-946-6262
I
AX
NTERNET
SPECIALISTS IN THE
MEASUREMENT AND
CONTROL OF VISCOSITY
http://www .brookfieldengineering.com

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Summary of Contents for Brookfield DV2T

  • Page 1: Operating Instructions

    Manual No. M13-167 SPECIALISTS IN THE MEASUREMENT AND CONTROL OF VISCOSITY Boston • Chicago • London • Stuttgart • Guangzhou with offices in: BROOKFIELD ENGINEERING LABORATORIES, INC. 11 Commerce Boulevard, Middleboro, MA 02346 USA 508-946-6200 800-628-8139 (USA excluding MA) 508-946-6262 http://www .brookfieldengineering.com...

  • Page 3: Table Of Contents

    III.5 Selecting Data Collection .....................25 III.6 End Condition ........................28 III.7 Additional Test Parameters ....................29 III.8 Running a Test ........................32 III.9 Results ...........................34 III.10 Data Averaging ........................36 IV. SETTINGS ......................40 IV.1 Device Setup .........................40 IV.2 User Settings .........................43 IV.3 Global Settings ........................45 IV.4 Admin Functions ........................50 IV.4.1 Log In and Log Out ....................50 IV.4.2 Users and Access ....................51 Brookfield Engineering Labs., Inc. Page 3 Manual No. M13-167...
  • Page 4 ............67 Variables in Viscosity Measurement Appendix D: ................. 69 Spindle and Model Codes Appendix E: ................72 Calibration Procedures Appendix F: ................79 The Brookfield Guardleg Appendix G: ..................81 Speed Selection Appendix H: ..................82 Laboratory Stand Appendix I: ................85 DVE-50A Probe Clip Appendix J: ............

  • Page 5: Introduction

    • The Brookfield PG Flash Software can be used to program the DV2T to control all aspects of the test and data collection without the need for the operator to monitor the instrument; just start the program and return to the printed test data (printer is optional). [See Section V: PG Flash Software] • The Brookfield RheocalcT Software will perform all control and data collection functions of the DV2T from the PC while also providing a platform for advanced data collection and analysis. In any of these modes of control, the DV2T will provide the best in viscosity measurement and control. The principal of operation of the DV2T is to drive a spindle (which is immersed in the test fluid) through a calibrated spring. The viscous drag of the fluid against the spindle is measured by the spring deflection. Spring deflection is measured with a rotary transducer. The measurement range of a DV2T (in centipoise or milliPascal•seconds) is determined by the rotational speed of the spindle, the size and shape of the spindle, the container the spindle is rotating in, and the full scale torque of the calibrated spring. There are four basic spring torque series offered by Brookfield: Spring Torque Model dyne•cm...

  • Page 6: Components

    Power Cord DVP-65 for 115 DVP-65 DVP-66 for 230 DVP-66 RTD Temperature Probe DVP-94Y Guard Leg DV2TLV B-20Y DV2TRV B-21Y Carrying Case DVE-7Y PG Flash Software CD-PROGA RheocalcT Software GV-3003 ø USB Flash Drive GV-1044 Screen Cloth w/case GV-1045 Stylus GV-1043 Operating Manual M13-167 Shipping Cap Brookfield Engineering Labs., Inc. Page 6 Manual No. M13-167...
  • Page 7 Guard Leg LV Spindle Set shown above Leveling Screw Cone/Plate Option Temperature Probe Wrench Temperature Probe Clip Toggle Switch for Electronic Gap Tension Bar Cone Spindle Sample Cup Temperature Probe Figure I-1 Brookfield Engineering Labs., Inc. Page 7 Manual No. M13-167...

  • Page 8: Utilities

    See Appendix B. ±0.2% of Full Scale Range Viscosity Repeatability: ±1°C | -100°C to +149°C Temperature Accuracy: ±2°C | +150°C to +300°C 0°C to 40°C temperature range (32°F to 104°F) Operating Environment: 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” in the part number (the ninth digit; for example: XDV2THBTB00U00). 2) When attaching and detaching the spindle, it is not necessary to lift the coupling where the spindle connects to the instrument. 3) The Oscillation Check explained in Section IV.1: Device Setup, does not pertain to this instrument. Brookfield Engineering Labs., Inc. Page 8 Manual No. M13-167...

  • Page 9: Installation

    Note: “IQ, OQ, PQ”, an abbreviated guideline document for installation, operation and performance validation for your DV2T digital viscometer can be downloaded from our website www.brookfieldengineering.com. A more detailed IQ,OQ,PQ procedure is available for purchase from Brookfield or your authorized dealer. 1) Assemble the Model G Laboratory Stand (refer to assembly instructions in Appendix H). 2) Put the viscometer on the stand. 3) Connect the RTD probe to the socket on the rear panel of the DV2T. 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 the front of the DV2T 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. Lower the cup and remove the foam insert. (Save for future shipments.) 6) Make sure that the AC power switch at the rear of the DV2T is in the OFF position. Connect the power cord to the socket on the back panel of the instrument and plug it into the appropriate AC line. For Cone/Plate Models, be sure that the toggle switch, used to activate the electronic gap, is to the left position. (Left when facing the viscometer.) The AC input voltage and frequency must be within the appropriate range as shown on the nameplate of the viscometer (see Section I.2). Brookfield Engineering Labs., Inc. Page 9 Manual No. M13-167...
  • Page 10 Note: The DV2T must be earth grounded to ensure against electronic failure!! 7) Turn the power switch to the ON position and allow the viscometer to warm up for 10 minutes before performing autozero. 8) For Cone/Plate models, refer to Appendix A. 9) If appropriate, connect USB cable (DVP-202) to USB port for connection of DV2T to PC or printer. 10) Review Read Me file. The Read Me file contains notes on the DV2T Firmware. This file can be found on the CD that contains the PG Flash Software. Temperature Probe USB B USB A Power Input On/Off Switch Figure I-2 Brookfield Engineering Labs., Inc. Page 10 Manual No. M13-167...

  • Page 11: Safety Symbols And Precautions

    Precautions If this instrument is used in a manner not specified by the manufacturer, the protection provided by the instrument may be impaired. This instrument is not intended for use in a potentially hazardous environment. 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 The DV2T Viscometer utilizes a touch screen display and interface. The user will provide all input to the viscometer through the touch screen. Figure I-3 details the different types of information and actions available. Status Bar Title Bar Test Name Data Fields More/Less Bar Command Keys Figure I-3 Brookfield Engineering Labs., Inc. Page 11 Manual No. M13-167...

  • Page 12: Cleaning

    Clean with a dry, non-abrasive cloth. Do not use solvents or cleaners. The instrument housing is manufactured from polycarbonate ABS. Clean instrument housing with mild soap and water. Do not apply solvent to the instrument! Immersed Components (spindles): Spindles are made of stainless steel. Clean with a non- abrasive cloth and solvent appropriate for sample material. When cleaning, do not apply excessive force, which may result in bending spindles. Brookfield Engineering Labs., Inc. Page 12 Manual No. M13-167...

  • Page 13: Getting Started

    II. GETTING STARTED II.1 Power Up The DV2T will go through a Power Up sequence when the power is turned on. The Viscometer will issue a beep, present a blue screen, and finally show the DV2T About screen for 5 seconds. The About screen is shown below and includes several critical parameters about the viscometer including; viscometer torque (LV, RV, HA, HB, or other), firmware version number, model number (DV2TLV for example) and the serial number. Figure II-1 The About screen can also be accessed through the Settings Menu (see Section IV.1). The DV2T Viscometer will automatically transition from the About screen to the AutoZero screen. TIP: When contacting Brookfield or your authorized Brookfield dealer for technical support or repair services, please record the information on the About screen and include this detail in your email. II.2 AutoZero The DV2T Viscometer must perform an AutoZero prior to making viscosity measurements. This process sets the zero reading for the measurement system. The AutoZero will be performed every time the instrument is turned on. Additionally, you may perform an AutoZero at any time through the Settings Menu (see Section IV.1). The AutoZero screen will be presented automatically, after the About screen, during a power up. Brookfield Engineering Labs., Inc. Page 13 Manual No. M13-167...

  • Page 14: Ii.3 Status Bar

    USB Icon 1,2,3: The DV2T Viscometer can store data and tests to USB storage device (USB B) such as a USB Flash Drive. There are three USB ports. These ports are represented as 1, 2 and 3 based on the order of connection. Printer Icon: The DV2T Viscometer can communicate to a label printer for printing test results (see Section II.8). Computer Icon: The DV2T Viscometer can communicate with a computer through the USB A port. Communication is supported with Brookfield RheocalcT software. Brookfield Engineering Labs., Inc. Page 14 Manual No. M13-167...

  • Page 15: Ii.4 Navigation

    II.4 Navigation The DV2T Viscometer uses a touch screen display. Navigation of the instrument features is done using a variety of Data Fields, Arrows, Command Keys and Navigation Icons. The operating system has been designed for intuitive operation and employs color to assist the user in identifying options. Data Fields require that the user touch the screen to initiate the data entry / selection process. These fields are normally outlined in black. They may also include a blue arrow. Blue Arrows indicate that options exist for a Data Field. The user may be required to press anywhere in the Data Field or they may have to press the Blue Arrow specifically. Command Keys are buttons which direct the DV2T to perform a specific action such as SAVE a data set or STOP a program. Command Keys are presented in a variety of colors. These keys are normally found at the bottom of the screen. Navigation Icons are normally found in the Title Bar to the left and right. These buttons will take you to specific areas of the operating system. Navigation Icons are shown below. Perform data entry from a scroll...

  • Page 16: Ii.5 Home Screen

    Figure II-3 Configure Viscosity Test: Create and Run viscosity tests. Load Test: Load a test that has previously been saved or created with PG Flash software. Tests may be loaded from internal memory or a USB Flash Drive. View Results: Load Results (saved test data) that have previously been saved. Results may be loaded from internal memory or a USB Flash Drive. Manage Files: Manage the file system in the internal memory or on a USB Flash Drive for test programs and saved data. Create new folder structures, delete files, rename files and move files. External Mode: Direct the DV2T to communicate with Brookfield Rheocalc T Software for complete viscometer control. Each of the Main Menu items are detailed in the following sections of the manual. II.5.1 Configure Viscosity Test Viscosity measurements are made on the DV2T Viscometer through the Configure Viscosity Test function. The user is presented with Configure Viscosity Test at the conclusion of the AutoZero function or by selection on the Home Menu All elements related to the measurement of viscosity are selected within Configure Viscosity Test. Tests that are created can be saved to the internal memory of the DV2T Viscometer or onto...
  • Page 17 The More/Less bar is seen just below the test parameters. In Figure II-4, this bar includes a down arrow, which indicates that more information is available. Figure II-5 shows the additional information that can be accessed. The More/Less bar , in this view, now has an up arrow indicating that the additional information can be hidden. Status Bar Title Bar Data Fields More/Less Bar Command Keys Figure II-5 The Command Keys include Clear, Save and Run. Clear: Clear all data that has been entered into the test parameters and restore the values to the factory default. Save: Save the current test. Run: Run the current test. The Test Parameter area includes many elements of the viscosity test as well as live measurements of Torque % and Temperature. Temperature data will only be displayed if a Brookfield temperature probe is connected to the DV2T Viscometer. Brookfield Engineering Labs., Inc. Page 17 Manual No. M13-167...

  • Page 18: Ii.5.2 Load Test

    The currently selected speed of rotation. The viscometer will operate at this speed once the RUN command key is pressed. The speed may be changed by pressing the blue arrow. Temperature: A live signal from the viscometer when a temperature probe is attached (Brookfield part number DVP-94Y or SC4-61Y). End Condition: Specify the condition that will end the test. Data Collection: Specify the amount of data to be collected during the test. Instructions: Create a message that the user will see when the test begins.

  • Page 19: Ii.5.3 View Results

    The DV2T Viscometer can be controlled from a computer through the use of optional Brookfield Software RheocalcT. The viscometer must be placed into external control mode from the Main Menu . The viscometer must be connected to the computer with a USB A cable (DVP-202). TIP: The Status Bar will indicate a proper connection to the computer by displaying the Computer Icon The DV2T will display External Mode when configured for operation with the computer. This display includes a Return button that will reset the viscometer to stand alone operation. II.6 Range The DV2T Viscometer will calculate the measurement range for a specific spindle and speed combination. This information is displayed on the screen while selecting the spindle number as shown in Figure II-6. The Range is also shown in the Running Viscosity Test view during the measurement. Viscosity will be displayed in the unit of measure specified in Settings and is set to centipoise (cP) from the factory. Brookfield Engineering Labs., Inc. Page 19 Manual No. M13-167...

  • Page 20: Ii.7 Out Of Range

    Range Figure II-6 TIP: The Range value is the same as the AutoRange available on earlier Brookfield viscometer models. II.7 Out of Range The DV2T Viscometer will give on screen indications when the measurement is out of range of the instrument. When the %Torque reading exceeds 100% (over range), the display of %Torque, Viscosity, and Shear Stress will be EEEE (see Figure II-7). If the %Torque value is between 0 - 9.9%, the data field label will flash. When the %Torque is below zero (negative values), the display of Viscosity and Shear Stress will be ----. TIP: Brookfield recommends collecting data only when the %Torque reading is between 10 - 100%. Figure II-7 Brookfield Engineering Labs., Inc. Page 20 Manual No. M13-167...

  • Page 21: Ii.8 Printing

    Measurement data should not be collected when the %Torque reading is out of range. The out of range condition can be resolved by either changing the speed (reduce speed when reading is out of range: high) or changing the spindle (increase the spindle size when the reading is out of range: low). TIP: When comparing data, the test method is critical. Be sure that you know the proper spindle and speed required for the test method. If readings are out of range, this condition should be reported as the test result. II.8 Printing The DV2T Viscometer can communicate to a Dymo Label Writer 450 Turbo label printer. This printer can be purchased from Brookfield (Part No. GV-1046). The communication to the printer is by USB (cable provided with the printer). When the printer is connected to the DV2T, the printer icon will be visible in the status bar. The DV2T Viscometer can configure the print out for several formats of paper/labels. These various paper/label stocks are available from Brookfield. 1. GV-1049-10 SHIPPING LABEL 2.31 X 4IN. 300 P/ROLL (PKG of 10) 2. GV-1048-10 ADDRESS LABEL 1.13 X 3.5IN. 350 P/ROLL (PKG of 10) 3. GV-1047-10 CONTINUOUS PAPER 2.25IN. WD. X 300FT. LG (PKG of 10) Figure II-8 Brookfield Engineering Labs., Inc. Page 21 Manual No. M13-167...
  • Page 22 Printer format is detailed below: Data Label (Small) Data Label (Large) TIP: When printing to a label, if the data set includes more than one point, only the last point will be printed. Data Continuous Brookfield Engineering Labs., Inc. Page 22 Manual No. M13-167...

  • Page 23: Making Viscosity Measurements

    G) When you are ready to record the measurement result, press the Stop Test button. The screen will change to the Results Table. H) Record the % torque and viscosity. To run another test, press Configure Test. To return to the Home Screen, press the Home Icon. III.2 Preparations for Making Measurements A) VISCOMETER: The DV2T should be turned on, leveled and autozeroed. The level is adjusted using the two feet on the bottom of the base and confirmed using the bubble level on the front of the head. Adjust the feet until the bubble is inside the center target. Set the level prior to autozero and check the level prior to each measurement. The proper level is essential for correct operation of the DV2T. B) SAMPLE: The fluid to be measured (sample) must be in a container. The standard spindles supplied with the DV2T [LV (1-4), RV (2-7), or HA/HB (2-7)] are designed to be used with a 600 mL low form Griffin beaker (or equivalent container with a diameter of 8.25 cm). The same applies to the optional RV1, HA/HB1, and Vane spindles. Many other spindle systems are supplied from Brookfield with specific sample chambers such as the Small Sample Adapter, UL Adapter and Thermosel. Brookfield recommends that you use the appropriate container for the selected spindle. You may choose to use an alternate container for convenience, however, this may have an effect on the measured viscosity. The DV2T is calibrated considering the specified container. Alternate containers will provide results that are repeatable but may not be “true”.

  • Page 24: Iii.3 Selecting A Spindle/Speed

    (See Appendix F for more information on the guardleg.) The spindles are attached to the viscometer by screwing them onto the coupling nut on the lower shaft (see Figure III-1). Note that the spindles have a left-hand thread. The lower shaft should be secured and slightly lifted with one hand while screwing the spindle to the left. The face of the spindle nut and the matching surface on the lower shaft should be smooth and clean to prevent eccentric rotation of the spindle. Spindles can be identified by the number on the side of the spindle coupling nut. The motor should be OFF whenever spindles are being removed or attached. Figure III-1 Brookfield Engineering Labs., Inc. Page 24 Manual No. M13-167...

  • Page 25: Iii.4 Multiple Data Points

    III.4 Multiple Data Points The majority of viscosity and yield stress measurements are made at the quality control level and often consist of a single data point. The test is conducted with one spindle at one speed. The data point is a useful bench mark for the go/no-go decision in a production setting. The DV2T can be used for single point measurement. Many fluids exhibit a characteristic change in viscosity and yield stress with a change in applied force. This non-Newtonian flow behavior is commonly seen in paints, coatings and food products as a decrease in viscosity as shear rate increases or an increase in yield stress as a rotational speed increases. This behavior cannot be detected or evaluated with the single point measurement. Non-Newtonian flow is analyzed through the collection of viscosity data over a range of shear rates and the generation of a graph of viscosity versus shear rate (a rheogram). This information will allow for a more complete characterization of a fluid and may help in formulation and production of a product. The DV2T is capable of collecting multiple data points for comprehensive analysis of flow behavior when using test programs created with PG Flash Software (see Section V). More information on flow behavior, shear rate and rheograms is available in our publication, “More Solutions to Sticky Problems”. III.5 Selecting Data Collection The DV2T Viscometer offers several options for data collection. The Data Collection setting is shown in Configure Viscosity Test directly under the Temperature display. The factory setting is Single Point (see Figure III-3). Pressing the blue arrow, in this field, will present the Data Collection screen (see Figure III-4). Brookfield Engineering Labs., Inc. Page 25 Manual No. M13-167...
  • Page 26 Figure III-3 Figure III-4 Single Point: Collect only a single data point when the End Condition is met. Single Point Averaging: Specify an amount of time over which to average measured data. Collect a single data point when the End Condition is met. This data point is an averaged value. If the time for averaging is shorter than the total time for the step, then the average will be performed for the specified time at the end of the test. Example 1: The End Condition is Time with a value of 1 minute and 30 seconds, the Single Point Averaging Duration is 30 seconds, the single data point collected from this step will be an average of the data measured from 1 minute to 1 minute 30 seconds. Brookfield Engineering Labs., Inc. Page 26 Manual No. M13-167...
  • Page 27 Example 5: End Condition is Time = 2 minutes, Multi Point Data Interval is 10 seconds. Averaging Duration is 5 seconds. Total points collected will be 12 with the last data point taken in the last second of the step. Each data point will be an average of the data measured in the last 5 seconds of each Data Interval. Example 6: End Condition is set to Viscosity = 200 cP, Multi Point Data Interval is 10 seconds. Averaging Duration is 5 seconds. During the test, the total time required to reach 200 cP is 63 seconds. Total points collected will be 6 with the last data point taken at 60 seconds, 3 seconds before the test is finished. Each data point will be an average of the data measured in the last 5 seconds of each Data Interval. Example 7: End Condition is set to Viscosity = 200 cP, Multi Point Data Interval is 10 seconds. Averaging Duration is 5 seconds. Check the check box to Also Collect Single Point at Step End. During the test, the total time required to reach 200 cP is 65 seconds. Total points collected will be 7 with the last data point taken at 65 seconds, an average of the 5 seconds after point #6. Example 8: End Condition is set to Viscosity = 200 cP, Multi Point Data Interval is 1 minute. Averaging Duration is 20 seconds. Check the check box to Also Collect Single Point at Step End. During the test, the total time required to reach 200 cP is 10 Brookfield Engineering Labs., Inc. Page 27 Manual No. M13-167...

  • Page 28: Iii.6 End Condition

    No Data: End Condition is met and no data is collected. III.6 End Condition The completion of a test is defined by the End Condition. Each time that you enter Configure Viscosity Test, the End Condition will be set to the last value used. The End Condition parameter or values can be changed by pressing the End Condition button. Within the End Condition screen, the currently selected End Condition parameter and values are displayed. The End Condition can be changed by pressing the blue down arrow within the parameter field. Six End Conditions are available: Time, # of Points, # of Revolutions, Torque, Viscosity, Temperature (see Figure III-5). Figure III-5 Time: The test will complete when the specified amount of time has elapsed. Time is entered in Hours, Minutes, and Seconds. Hours: 0-99 Minutes: 0-59 Seconds: 0-59 A time of zero hours, minutes and seconds may be selected. With this End Condition, the DV2T will operate at the selected speed until the operator selects Stop Test. Data will be collected according to the Data Collection setting (see Section III.5). TIP: An End Condition of zero Time can be useful when measuring a new material. During the test, the speed can be changed without ending and then rerunning the test (see Section III.8). This method can allow you to quickly evaluate the spindle selection to determine the best speeds for testing. Brookfield Engineering Labs., Inc. Page 28 Manual No. M13-167...

  • Page 29: Iii.7 Additional Test Parameters

    TIP: A small tolerance value will require a much longer time to reach the End Condition. TIP: If using PG Flash to create a test program, consider using a larger Tolerance value for the End Condition and then use a second step for thermal equilibrium (End Condition Time). This two step method can reduce the variability in test time caused by variations in temperature sensors. III.7 Additional Test Parameters The Configure Viscosity Test screen includes a More/Less Bar. When pressed, the More Bar will present several additional Test Parameters including: QC Limits, Instructions, Reports, and Density. These parameters are always available and active regardless of the position of the More / Less Bar. QC Limits: Select an acceptable range for measurement results. The range may be defined by Viscosity, Torque, Time, Temperature, or Shear Stress. The possible range for Viscosity and Shear Stress will be defined by the spindle and speed selected. QC Limits are a visual and audible signal to the operator during the test. The data set does not include an indication of QC Limits violation. Brookfield Engineering Labs., Inc. Page 29 Manual No. M13-167...
  • Page 30 A violation of the QC Limits during the test will be indicated by a flashing yellow box around the display for the specified parameter. Note that Time does not have a dedicated display. A violation will also result in an audible beep and a one time warning message (see Figure III-6). Data will continue to be collected while the warning message is displayed. Figure III-6 When Viscosity or Torque are the selected QC Limits parameter, QC Limits will be shown during the test on the Trend Bar if that parameter is selected for display (see Figure III-7). The QC Limits are represented by the dashed lines. TIP: Audible alarms may be turned off in the User Settings TIP: An indication of a QC Limit violation is not part of the data set. The user can record a violation by using the Notes available when viewing test Results (see Section III.9). Trend Bar Figure III-7 Brookfield Engineering Labs., Inc. Page 30 Manual No. M13-167...
  • Page 31 Post Test Averaging can be specified as either Test Averaging or Step Averaging. Test Averaging allows you to select which step from the program (created with PG Flash) is to be averaged and displayed. Step Averaging is used when there is a single test step (as created from the display of DV2T). See Section III.10 for more detail relating to Data Averaging. The data path for saving data can be preselected as part of the test report. TIP: Selecting a data path can help to organize data storage in the internal memory of DV2T. By preselecting the data path, operators are directed to put data from specific tests into specific areas. TIP: If you select a data path that includes a USB Flash Drive location and the USB Flash Drive has been removed, an error message will be displayed. Density: Input a density value for the sample to be tested. This value will be used to calculate viscosity when kinematic viscosity units have been chosen for display (see Section IV.4.2). Brookfield Engineering Labs., Inc. Page 31 Manual No. M13-167...

  • Page 32: Iii.8 Running A Test

    Trend Bar Command Keys Figure III-9 The Running Viscosity Test screen provides information on the current measurement including: Torque, Viscosity, Shear Stress, Shear Rate, Temperature and Speed. Torque is the deflection of the Viscometer torque sensor. It is described as a percent (%) and has a range of 0 – 100%. The DV2T will provide measurement results within the stated accuracy provided the Torque reading is between 10 and 100%. If the Torque reading falls below 10% the labels in the data fields will flash to indicate an error condition. Brookfield does not recommend that data be collected below 10% Torque; however, data collection is not restricted. TIP: Torque on the DV2T is equivalent to the dial reading from the Brookfield Dial Reading Viscometer or the % reading from Brookfield Digital Viscometers (DV-E, DV-I, DV-II, DV-III). Viscosity is calculated from the measured Torque based on the selected spindle and speed of rotation. The units of viscosity are defined in the Global Settings section of the Settings Menu . If the Torque reading falls below 10%, the labels in the data fields will flash to indicate an error condition. Shear Stress is calculated from the measured Torque based on the selected spindle. The units of shear stress are defined in the Global Settings section of the Settings Menu . If the Torque reading falls below 10%, the labels in the data fields will flash to indicate an error condition. TIP: Shear Stress will be displayed as zero for spindles that do not have SRC values. Shear Rate is calculated from the selected speed based on the selected spindle.
  • Page 33 Torque or Viscosity, the limits will be indicated on the Trend Indicator Bar (see Section III.7). Two Command Keys are available on the Running Viscosity Test screen: View Test and Stop Test. Stop Test: Immediately stops the current test. The user will be presented with a confirmation box. The test will continue to run until Yes is selected in the Confirmation box. If any data had been collected during the test, the user will be presented with the Results screen (see Section III.9). If data was not collected, the user will be returned to the Configure Viscosity Test screen. TIP: If the operator selects “Do not show this message again” within the Confirmation box, then the Confirmation box will no longer be displayed when Stop Test is pressed. This condition can be reset in the Display section of User Settings View Test: Change the view from measurement to test parameters including: Spindle, Speed, Temperature, End Condition, Data Collection, QC Limits, Instructions, and Density. The View Test screen includes a live display of Torque and a Time parameter that shows the total elapsed time for the test (see Figure III-10). Brookfield Engineering Labs., Inc. Page 33 Manual No. M13-167...

  • Page 34: Iii.9 Results

    Figure III-10 The More/Less Bar can be used to reduce the number of parameters shown in the display. The Speed parameter is active in this view. The operator can change the speed of test without returning to the Configure Viscosity Test screen. TIP: If the speed is changed during the execution of a saved test, then the test status will be changed to “Unsaved Test”. This will also be reflected if the collected data is saved. View Test includes the Stop Test command key and a Back Arrow navigation key. The Back Arrow is used to return the display to the Running Viscosity Test view. III.9 Results Measurement data is viewed in the Results screen. This screen is presented at the conclusion of a test or when data is loaded through the View Results selection from the Home Menu. The DV2T utilizes a comprehensive data format. Data files include the complete set of measurement results and calculated values along with the test protocol. All elements of the test can be viewed in the Results screen. The DV2T Viscometer allows for 5000 total data points per file. When viewing large data files, additional time is required when moving from the various Results options listed below. There may be some delay on the screen while the DV2T prepares the data. Brookfield Engineering Labs., Inc. Page 34 Manual No. M13-167...
  • Page 35 The Results screen includes several Navigation Icons and Command Keys. Home: Return to the Home Menu. Down Arrow: Select Results Options. Blue Arrow: Select Page of Results Table. Print: Print Data to USB printer. Save: Save data. Configure Test: Return to Configure Viscosity Test screen. Scroll Bar: Move up/down through a page of data. The Results screen offers several options for viewing test data. These options are accessed via the Down Arrow in the Navigation Bar at the top of the screen (see Figure III-11). Figure III-11 Table: Display all data points. Data will be shown in a scroll list where each page can hold a maximum of 50 points. If the data set has more than 50 points, then additional pages will be indicated at the bottom of the screen. Additional pages of data can be accessed through the use of the Blue Arrows Brookfield Engineering Labs., Inc. Page 35 Manual No. M13-167...

  • Page 36: Iii.10 Data Averaging

    Compare Results: Load two data sets and view side by side. Figure III-12 Device Info: Display basic information about the data file and the specific DV2T Viscometer used to collect the data including: date and time the test started, completed and was saved; if user accounts are active, which user saved the data; viscometer serial number, firmware version, viscometer Torque range (LV, RV, HA, HB, other). III.10 Data Averaging The DV2T Viscometer offers two techniques to average data, Live Averaging and Post Test Averaging. Data averaging can be useful when measuring samples with entrained air or suspended particles that case some variation in measurement results. Data averaging may not be useful when changes in measurement results are caused by the rheological properties of the test sample such Brookfield Engineering Labs., Inc. Page 36 Manual No. M13-167...
  • Page 37 Post Test Averaging of data occurs after the test is complete, through the Results screen. Averages and standard deviation values can be generated for data collected in a single step or across several steps of a test generated through PG Flash software. If the test used to collect data utilized Live Averaging (described above), then the Post Test A veraging will produce an average value of averaged data points. Post Test Averaging can be specified in the Report section of Configure Viscosity Test (see Section III.7). When configured as part of the test, the average values will be displayed immediately upon test conclusion. If not specified in Report, Post Test Averaging can be selected from the Down Arrow in the Results screen (see Section III.9). Post Test Averaging offers two options: Step Averaging and Test Averaging (see Figure III-13). Figure III-13 Brookfield Engineering Labs., Inc. Page 37 Manual No. M13-167...
  • Page 38 Step Averaging: Calculate Average and Standard Deviation for all data collected within a single step test (all tests created directly on the DV2T are single step tests). Step Averages will be displayed as shown below in Figure III-14. Figure III-14 Test Averaging: Calculate Average and Standard Deviation for all data collected within step specified. Tests created using PG Flash software can have multiple steps each with their own Data Collection method. Test Averages will be displayed as shown below in Figure III-15. Figure III-15 Brookfield Engineering Labs., Inc. Page 38 Manual No. M13-167...

  • Page 39: Settings

    - Information that may be requested by Brookfield Technical Support staff to assist with troubleshooting. About - Present basic information about the DV2T as is done at start up. Temperature: The Temperature setting allows the user to create up to 10 temperature offset values for connected temperature probes. Brookfield offers several types of temperature probes for use with the DV2T including: DVP-94Y immersion probe (supplied with the DV2T), CPA-44PYZ embedded probe (optional with Cone/Plate DV2T Viscometers), and SC4-13RP embedded probe (optional with Small Sample Adapter). Any of these probes can be calibrated locally against a standard reference thermometer to determine an offset (how far from the actual temperature does the probe read). This offset can be entered into the DV2T Viscometer and identified with a name defined by the user.
  • Page 40 Figure IV-2 The creation of a Temperature Offset requires input of the offset value and a name. The offset value must be in the range of -9.9 to 9.9 C. The Name can be up to 14 characters long. To delete an existing Temperature Offset, first select the offset from the list, then press the Delete command key at the bottom of the screen. The use of a Temperature Offset will be indicated in the Temperature field displayed in the Configure Viscosity Test screen with a (o) beside the Live indication. Printer Setup: The DV2T is configured for use with the Dymo 450 printer. No other printers can be utilized with the viscometer. Printer Setup allows the user to choose from three different configurations for print out. Label Small: A small label (1.13inch x 3.5inch) that allows for printing of limited data for a single data point. The label stock is available from Brookfield; part number GV-1048-10. Label Large: A large label (2.31inch x 4.0inch) that allows for printing of a complete set of parameters for a single data point. The label stock...
  • Page 41 A utoZero function is selected, the DV2T is immediately set to AutoZero mode and the user is presented with the AutoZero screen (Figure II-2). Upon completion, the user will be returned to the Device Setup menu. Oscillation Check: The Oscillation Check is a check of the performance of the lower bearing of the DV2T Viscometer. This lower bearing is either Point and Jewel or Ball Bearing. Correct performance of the lower bearing is essential for proper operation of the viscometer. A failed lower bearing will normally cause viscosity measurements to be lower than expected. An Oscillation Check is performed as follows: • Remove the spindle and level the DV2T Viscometer • Gently push up on the viscometer coupling. • Turn the coupling until the % Torque reading is 10 – 15 %. • Gently let go of the coupling. • Watch the reading. The % Torque reading should decrease smoothly and oscillate about 0.0%. Selecting Oscillation Check in the Device Setup menu will present the user first with a screen instructing to level the viscometer and remove the spindle.

  • Page 42: Iv.2 User Settings

    TIP: The information on the About screen will be needed when contacting Brookfield for support. To return from the About screen, press the Left Arrow navigation button in the Title Bar. IV.2 User Settings The User Settings menu includes settings related to specific users. The DV2T may be set up for a single user setting (used by one or more operators) or for multiple users who access through a Log In and Password. Three User settings are available including: Sound - Adjust the volume of the DV2T sounds and select which sounds to silence. Display - Adjust the brightness, select language and restore Pop-Up messages. Change Password - Change the password for the Log In account used to access the DV2T Viscometer.
  • Page 43 The Language Setting is selected by pressing the Language field and choosing the appropriate language from the list. The selected language will be implemented immediately. Pop-Up Messages can be toggled on/off through the check box (see Figure IV-5). This check box applies to all Pop-Up Messages. Pop-Up Messages can be toggled off individually through the check box that appears within the message box. Once the Pop-Up is turned off, it will not be shown again. Pop-Up Messages can be restored through the use of the Restore Hidden Pop-Ups command key at the bottom of the Display Settings screen. This command key will restore all Pop-Ups. Figure IV-5 Change Password: A specific user can change their own password at any time. The user must first enter the current password. Then the user will be prompted to enter and confirm the new password. TIP: If the administrator password is lost, it can be reset. Please contact Brookfield or your Brookfield representative. Remember to have the information found in the About screen available (see Section IV.1). Brookfield Engineering Labs., Inc. Page 43 Manual No. M13-167...

  • Page 44: Iv.3 Global Settings

    Density field in Configure Viscosity Test. Speed revolutions per minute reciprocal seconds The relationship between RPM and 1/s is defined by the SCR value of the selected spindle. See Appendix D for details. Temperature Centigrade Fahrenheit 100 C = 5/9 * (212 F – 32) Stress (Shear) Dyne/cm Dyne per square centimeter Newton / square meter Pascal 10 dyne/cm = 1 N/m = 1 Pa Brookfield Engineering Labs., Inc. Page 44 Manual No. M13-167...
  • Page 45 ISO Standard Month/Day/Year USA Standard Day/Month/Year International Standard Global Alarm: The Global Alarm establishes a single measurement parameter with a range of acceptance. Whenever the measured value exceeds this range of acceptance, an audible and visual alarm will be issued. The Global Alarm will apply to any test that is run. The QC Limit also establishes a measurement parameter with a range of acceptance; however, the QC Limit is applied only to the test in which it is defined. The Global A larm can be set for any of the four measurement parameters including; Shear Stress, Temperature, Torque and Viscosity. Once a parameter is selected, both low and high limits must be entered. These limits are independent of the spindle and speed selected. When the global alarm is triggered, the DV2T will provide an audible alarm and a Warning message on the screen (see Figure IV-6). Brookfield Engineering Labs., Inc. Page 45 Manual No. M13-167...
  • Page 46 The error message will provide some detail about the alarm condition. The test and data collection will continue while the Warning message is displayed. The audible alarm will continue to sound until the operator touches the OK button within the Warning box. Figure IV-6 The Running Viscosity Test display will show a colored box around the data parameter associated with the Global Alarm. When the alarm condition is first met, the colored box will be yellow. If the measurement parameter returns to the acceptable range, then the colored box will be removed. When the alarm condition is met a second time, the colored box will be red (see Figure IV-7). The audible alarm will only sound once. Figure IV-7 TIP: The Global Alarm sound can be turned off in the Sounds menu of User Settings. Brookfield Engineering Labs., Inc. Page 46 Manual No. M13-167...
  • Page 47 Invalid Input message and prevent the selection of the spindle (see Figure IV-8). List Button Figure IV-8 TIP: To ensure that the correct spindle code is always entered, create a test that is saved to the DV2T memory. TIP: The selection of spindle can be restricted by User Log In. Use this restriction combined with a saved test configuration to ensure that the correct spindle is always used for critical tests. See Section IV.4.2 for details of Users and Access. A Special Spindle can be created when the user has developed a new spindle geometry or when using a standard Brookfield spindle in a non standard measurement container. The Special Spindle, once created, will be available to users through the Spindle selection in Configure Viscosity Test. A Special Spindle is created by selecting the Special Spindle command button in the Edit Spindle List menu. A Special Spindle requires a code, a name, and an SMC value. Optional values include SRC and YMC. Brookfield Engineering Labs., Inc. Page 47 Manual No. M13-167...
  • Page 48 DV3T operating instructions for more information. Speed List: The selection of Speed in Configure Viscosity Test can be done by using either a number pad or a scroll list. (This choice is selected through the navigation button in the Set Spindle screen.) When scroll list is selected, the speed entry is restricted to the classic Brookfield speed sets for the LV and RV/HA/HB viscometers. The contents of the scroll list are defined in the Speed List menu. Each speed can be individually selected or deselected through the use of a check box. Select or deselect all speeds by using the Select All check box. Select or deselect all LV (or RV/HA/HB) speeds by using the Select All LV check box. The classic Brookfield speed sets are defined below. 0.3, 0.6, 1.5, 3, 6, 12, 30, 60 RV/HA/HB: 0.5, 1.0, 2.0, 2.5, 4, 5, 10, 20, 50, 100 Additionally, a new speed can be added to the list by selecting the New Speed command key at the bottom of the display. The New Speed must be selected within the range of available speeds on the DV2T: 0.0 – 200 RPM. Speed entry through the number pad is never restricted. TIP: To ensure that the correct speed is always entered, create a test that is saved to the DV2T memory. TIP: The selection of speed can be restricted by User Log In. Use this restriction combined with a saved test configuration to ensure that the correct speed is always used for critical tests. See Section IV.4.2 for details of Users and Access. Brookfield Engineering Labs., Inc. Page 48 Manual No. M13-167...

  • Page 49: Iv.4 Admin Functions

    - Update Instrument Firmware, add Language file, Back Up data and settings. Default Path - Define the logic for the Default Path for saving data and tests. Settings Reset - Reset basic settings to DV2T factory default. Device Reset - Reset the entire DV2T to factory default. Calibration Reminder - Establish use and frequency of calibration reminder. Save Audit Trail - Export the A udit trail to assist Brookfield when troubleshooting DV2T operation. IV.4.1 Log In and Lock Out The Log In and Lock Out menu allows the user to define the Log In requirement and toggle the Lock Out feature within Running Viscosity Test (see Figure IV-9). Figure IV-9 The Log In check box controls the Log In requirement. When Log In is checked, the DV2T will require a User ID and Password prior to allowing any activity. The Log In screen is presented on power up or when the User Icon is selected from the Home Menu. The user must select their Brookfield Engineering Labs., Inc.

  • Page 50: Iv.4.2 Users And Access

    The User Settings are divided into three categories; General Settings, Data Access Functions, and Viscosity Test Setup. Table IV-1 shows the factory default user settings for Power User and User. The administrator can customize both the Power User and User through the Power User Level Access and User Level Access in the Users and Access Menu. Place a check mark beside an attribute that is available to the user and remove the check mark from an attribute that will be unavailable to the user. TIP: Users and User Access settings can be exported to a Flash USB drive. This file can be uploaded to another DV2T or DV3T to quickly duplicate User settings. The User ID utilized at Log In will be reflected in a saved data set. This parameter is viewable in the Results screen by selecting Device Info. TIP: The User ID information is only visible once a data set is loaded from memory. An unsaved data set will not show the User ID. User accounts can be managed within the Users and Access menu through Edit Users, Add User and Delete User. Brookfield Engineering Labs., Inc. Page 50 Manual No. M13-167...
  • Page 51 Step End Condition • • Data Collection Mode • • QC Limits • • Density • • Graph Axes Math Model Default Results Screen • • Post Test Averaging • • Instructions • • Save Path • • Brookfield Engineering Labs., Inc. Page 51 Manual No. M13-167...

  • Page 52: Iv.4.3 Set Time And Date

    IV.4.3 Set Time and Date The Time and Date is displayed on the Status Bar at the top of every screen. These parameters are set within the Set Time and Date menu. The format for setting Time and Date will be based on the Regional Settings (see Section IV.3). Change from Set Time to Set Date by pressing the command key at the bottom of the screen. When both Date and Time are set correctly for your location, press OK to accept the change. IV.4.4 Backup and Import The DV2T Viscometer provides several options relating to storage of Results, Tests and User Settings. Backup and Import menu options relate to creating back up files, updating instrument software, and updating language files. Backup: Create a backup file from the DV2T internal memory including: Settings, User Profiles, Results, and Tests. This backup file is saved to a USB Flash Drive and can be uploaded (Restore) to any DV2T Viscometer. Choose the location within a USB Flash Drive where the Backup file is to be saved. A new folder can be created by using the New Folder button. Press the Backup button to create the Backup file. Restore: Upload a previously saved Backup file. The information from the Backup file includes: Settings, User Profiles, Results, and Tests. Existing User profiles will not be overwritten. User profiles from the Backup file will be added to the user profiles that already exist on the DV2T. Locate the Backup file on the attached USB Flash Drive. Press the Restore button to upload the Backup file.

  • Page 53: Iv.4.5 Default Path

    Figure IV-10 TIP: The Default Path can be overwritten at the time that data is saved. IV.4.6 Settings Reset Settings Reset will return the DV2T settings (Device, User and Global) to the factory default. Internal memory will not be affected. User accounts will not be affected. IV.4.7 Device Reset DATA LOSS POSSIBLE! Device Reset will return the DV2T to the factory default condition. All data, tests and Audit Trails...

  • Page 54: Iv.4.8 Calibration Reminder

    IV.4.8 Calibration Reminder The DV2T can be programmed to provide the user with a reminder that calibration is due. Two parameters must be set: Frequency in Months and Start Date. When both parameters are entered, the Calibration Reminder screen (see Figure IV-11) will calculate and display the day when the reminder will be presented. Check the Calibration Reminder On check box to activate this feature. Figure IV-11 The Calibration Reminder will be presented during the first power up on or after the specified day. The message box (see Figure IV-12) requires that the user press OK before the AutoZero will be performed. Figure IV-12 The calibration reminder will be reset by Brookfield or your authorized Brookfield dealer when the unit is returned for calibration. Brookfield Engineering Labs., Inc. Page 54 Manual No. M13-167...

  • Page 55: Iv.4.9 Save Audit Trail

    IV.4.9 Save Audit Trail The A udit T rail is a collection of instrument check values that can assist Brookfield with troubleshooting activities. You may be asked to provide the Audit Trail files. Use Save Audit Trail to create an Audit Trail file on a USB stick. Two files will be created: Users.bin and Service.bin. Brookfield Engineering Labs., Inc. Page 55 Manual No. M13-167...

  • Page 56: Pg Flash Software

    V. PG FLASH SOFTWARE Viscosity Test programs for the DV2T can be created on a computer through the use of PG Flash software. PG Flash is provided with all DV2T Viscometers on a CD that contains several different Brookfield utility software programs. PG Flash is designed to operate on the Windows platform XP or higher. PG Flash software provides all Viscosity Test controls that are available on the DV2T. A dditionally, multiple step Viscosity Test programs can be created for use on DV2T. Tests that are created and saved on the computer can be loaded onto a USB Flash Drive and then loaded into the DV2T through the Load Test function PG Flash offers: • Convenient Viscosity Test creation through a PC interface • Storage of Viscosity Tests on a PC or USB Flash Drive • Creation of single step Viscosity Tests • Creation of multiple step Viscosity Tests Windows Requirements for PG Flash: • Windows™ 2000 or above • 500 MHz processor • 256 MB RAM • USB Port • 1280x768 resolution display The PG Flash interface is shown in Figure V-1. This screen is divided into four areas: Instrument...
  • Page 57 QC High / QC Low Limit Parameter based on the chosen QC Limits. Collect Single Point at Step End: During a Multi Point data collection, force the DV2T to collect a data point at the end of the step (when the End Condition is achieved). Include This Step into Average Calculation: Data from this step will be included in the average calculation indicated by the selection in Post Test Averaging. Add, Insert, Delete Step Buttons Save Button The Program Grid shows all Test Parameters for each step in a line view. All measurement units can be set through the Units Setup button, see Figure V-2. This menu can be pinned to the screen. If the menu is not pinned, then it will minimize when the mouse is moved outside of the window. Brookfield Engineering Labs., Inc. Page 57 Manual No. M13-167...
  • Page 58 Units Setup Figure V-2 Sample Viscosity Test programs can be seen in the following figures. Figure V-3 demonstrates a typical single step test. Figure V-4 demonstrates a multiple step test. Figure V-3 Figure V-4 Brookfield Engineering Labs., Inc. Page 58 Manual No. M13-167...

  • Page 59: Appendix A: Cone/Plate Viscometer Setup

    Appendix A - Cone/Plate Viscometer Set-Up This Cone/Plate version of the DV2T 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 (0.013 mm). When operating the Cone/Plate at elevated temperature, the gap must be set with the cup and spindle equilibrated at the temperature recommended. Maximum temperature for Cone/Plate operation is 80ºC. Maximum operational temperature of sample cup is 100 ºC. Personal protection is recommended when controlling to temperatures above 80ºC. Note: Micrometer Adjustment Ring will become hot when controlling sample cup at temperatures above 50ºC. Programmable DV2T Cone/Plate Viscometers, S/N 50969 and higher, have an Electronic Gap Setting feature. This feature enables the user to easily find the 0.0005 inch gap setting that was established at...
  • Page 60 Note: 5. Attach the cup, taking care not to hit the cone with the cup (Figure A-4), by positioning the cup against the mic ring and swinging the tension bar under the cup. The tension bar should have plastic tubing in place. Do Not hit the CONE with the CUP! Tension Bar Figure A-4 Brookfield Engineering Labs., Inc. Page 60 Manual No. M13-167...
  • Page 61 Full Scale Electronic Gap Setting feature “on”. Be sure to Division Marks shut the feature “off” before taking readings! Figure A-6 7. Carefully remove the sample cup. Note: 1. The cup may be removed and replaced without resetting the gap if the micrometer adjustment ring has not been moved. 2. Remove the spindle from the viscometer when cleaning. Re-establish the hit point every time the spindle is attached/detached. Brookfield Engineering Labs., Inc. Page 61 Manual No. M13-167...
  • Page 62 CPA-41Z, CPE-41, CP-41 2.0 mL CPA-42Z, CPE-42, CP-42 1.0 mL CPA-51Z, CPE-51, CP-51 0.5 mL CPA-52Z, CPE-52, CP-52 0.5 mL 4. Attach the sample cup to the Viscometer and allow sufficient time for the sample, cup and cone to reach temperature equilibrium. 5. Turn the motor on. Set the desired speed(s). Measure the viscosity and record the reading in both % torque and centipoise (cP). 6. Verify that the viscosity reading is within the allowable 1% deviation, as explained earlier, for the specific viscosity standard fluid(s) that you are using. The CPE or CPA designation on the cone spindle indicates use with Electronic Gap Setting Cone/ Plate Viscometers/Rheometers only. Brookfield Engineering Labs., Inc. Page 62 Manual No. M13-167...

  • Page 63: Appendix B: Viscosity Ranges

    10,000 36.5 - 10,000 73 - 10,000 292 - 10,000 1.29N SC4-DIN-82 SC4-DIN-83 11.3 - 37,898 121.3 - 50,000 242.6 - 50,000 970.4 - 50,000 1.29N This spindle used with Thermosel only This spindle used with Small Sample Adapter only Å N represents speed in RPM. For example, spindle SC4-14 operated at 5 rpm has a shear rate of 0.40 x 5 = 2.0 sec Brookfield Engineering Labs., Inc. Page 63 Manual No. M13-167...
  • Page 64 20,000 - 20,000,000 40,000 - 40,000,000 160,000 - 160,000,000 3,900 - 4,686,500 50,000 - 50,000,000 100,000 - 100,000,000 400,000 - 400,000,000 7,800 - 9,373,000 100,000 - 100,000000 200,000 - 200,000,000 800,000 - 800,000,000 Brookfield Engineering Labs., Inc. Page 64 Manual No. M13-167...
  • Page 65 170.4K-1.704M V-71 5XHB 20-200 10.48K-104.8K V-72 5xHB 80-800 44.4K-444K V-73 5XHB 400-4000 214K-2.14M V-74 5xHB 4K-40K 2.172M-21.72M V-75 5xHB 1.6K-16K 852K-8.52M Note: 1. 1 Pa = 10 dyne/cm2 2. Viscosity Range is given at rotational speed of 10 RPM 3. 5xHB is the highest torque range available 4. Not for use with DV-E Viscometers M = 1 million K = 1 thousand Pa = Pascal cP = Centipoise mPa•s = Millipascal•seconds Brookfield Engineering Labs., Inc. Page 65 Manual No. M13-167...
  • Page 66 LV spindles 1 through 4 (supplied with LV series viscometers), RV spindles 2 through 7 (supplied with RV series viscometers), and HV series spindles 2 through 7 (supplied with HA series viscometers and HB series viscometers) in a 600 mL low form Griffin beaker. Brookfield offers a range of accessories for use with the Brookfield viscometer to accommodate special measurement circumstances. These accessories, while offering added capability to the user, also contribute to an expanded measurement tolerance beyond the instrument accuracy of +/- 1% of the range in use. This expanded measurement tolerance is a function of many parameters including spindle geometry, accessory alignment accuracy, sample volume requirement, and 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. Once the calibration of the viscometer itself is confirmed, the expanded tolerance of the...

  • Page 67: Appendix C: Variables In Viscosity Measurement

    RPMs). They fall into two groups: 1) Time Independent non-Newtonian 2) Time Dependent non-Newtonian Time 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 high RPM and then back to the low RPM, and the readings fall upon themselves, the material is time independent pseudoplastic (shear thinning). Time Dependent Thixotropic - A thixotropic material has decreasing viscosity under constant shear rate. If you set a Viscometer at a constant speed recording cP values over time and find that the cP values decrease with time, the material is thixotropic. - If you take viscometer readings from a low RPM to a high RPM and then back to the low RPM, and the readings are lower for the descending step, the material is time dependant, thixotropic. Brookfield publication, “More Solutions to Sticky Problems”, includes a more detailed discussion of rheological properties and non-Newtonian behavior. Brookfield Engineering Labs., Inc. Page 67 Manual No. M13-167...
  • Page 68 Viscometer Related Variables Most fluid viscosities are found to be non-Newtonian. They are dependent on Shear Rate, time of test 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 cP values produced will be different because the readings were made at different shear rates. The faster the spindle speed, the higher the shear rate. 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. A repeatable viscosity test should control or specify the following: 1) Test temperature 2) Sample container size (or spindle/chamber geometry) 3) Sample volume 4) Viscometer model 5) Spindle used 6) Whether or not to attach the guard leg 7) Test speed or speeds (or the shear rate) 8) Length of time or number of spindle revolutions to record viscosity 9) How the sample was prepared and/or loaded into the container Brookfield Engineering Labs., Inc. Page 68 Manual No. M13-167...

  • Page 69: Appendix D: Spindle And Model Codes

    Appendix D - Spindle and Model Codes Each spindle has a two digit entry code which is entered via the keypad on the DV2T. The entry code allows the DV2T 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. Note that where SRC = 0, no shear rate/ shear stress calculations are done and the data displayed is zero (0) for these functions. Table D-1 (Continued on following page) SPINDLE ENTRY CODE LV4 or 4B2 1280 LV-2C 0.212 LV-3C 0.210 Spiral 0.677 Brookfield Engineering Labs., Inc. Page 69 Manual No. M13-167...
  • Page 70 CPE-41 or CPA-41Z 1.228 CPE-42 or CPA-42Z 0.64 CPE-51 or CPA-51Z 5.178 3.84 CPE-52 or CPA-52Z 9.922 V-71 2.62 V-72 11.1 V-73 53.5 V-74 V-75 Table D-1 (Continued from previous page) Brookfield Engineering Labs., Inc. Page 70 Manual No. M13-167...
  • Page 71 Table D-2 lists the model codes and spring torque constants for each Viscometer model. Table D-2 MODEL CODE ON DV2T MODEL SCREEN DV2TLV 0.09373 2.5DV2TLV 0.2343 5DV2TLV 0.4686 1/4 DV2TRV 0.25 1/2 DV2TRV DV2TRV DV2THA 2DV2THA 2.5DV2THA DV2THB 2DV2THB 2.5DV2THB The full scale viscosity range for any DV2T model and spindle may be calculated using the equation: Full Scale Viscosity Range [cP] = TK * SMC * 10,000 where:...

  • Page 72: Appendix E: Calibration Procedures

    Appendix E - Calibration Procedures The accuracy of the DV2T 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, ° C, are shown in Table E-1 (Silicone Oils) and Table E-2 (Mineral Oils). calibrated at 25 For more help you can go to the website, www.brookfieldengineering.com, and download the video.
  • Page 73 Viscosity Standard Fluids may be stored under normal laboratory conditions. Disposal should be in accordance with state, local and federal regulations as specified on the material safety data sheet. 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. When using smaller volumes in accessories such as Small Sample Adapter, UL Adapter or Thermosel, the fluid is normally discarded. Calibration Procedure for LV #1-3 (#61-63) and RV, HA, HB #1-6 Brookfield Spindles Please note that the LV #4 (64) and RV, HA, HB #7 (07) spindles have been omitted from this procedure. Brookfield does not recommend the use of these spindles to perform a calibration...
  • Page 74 4) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test temperature. 5) Measure the viscosity and record the Viscometer reading. Note: The spindle must rotate at least five (5) times before readings are taken. Calibration Procedure using UL or DIN Adapters 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 UL or DIN Adapters. The use of an accessory device may increase the accuracy of measurement associated with the DV2T. Brookfield Engineering Labs., Inc. Page 74 Manual No. M13-167...
  • Page 75 (5) times before readings are taken. Calibration Procedure using a Helipath Stand and T-Bar Spindles When a Helipath Stand and T-Bar spindles are used: 1) Remove the T-bar spindle and select a standard LV (#1-3) or RV, HA, HB (#1-6) spindle. Follow the procedures for LV (#1-3) and RV, HA, HB (#1-6) Brookfield spindles outlined above. 2) T-Bar spindles should not be used for verifying calibration of the DV2T Viscometer. Calibration Procedure for Spiral 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 Spiral Adapter. The use of an accessory device may increase the accuracy of measurement associated with the DV2T.
  • Page 76 100% 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 E-2. Consult with Brookfield or an authorized dealer to determine which fluid is appropriate. Interpretation of Calibration Test Results: When verifying the calibration of the DV2T, the instrument and viscosity standard fluid error must be combined to calculate the total allowable error. The DV2T is accurate to (+/-) 1% of the range in use when using spindles LV #1-3, RV #2-6, HA #2-6 and HB #2-6. When using an accessory device with the DV2T such as Small 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 Engineering Labs., Inc. Page 76 Manual No. M13-167...
  • Page 77 Calculate the acceptable accuracy for viscosity measurement using DV2TLV Example: with SC4-21 spindle in Small Sample Adapter at 6, 12, and 30 RPM. Brookfield viscosity standard fluid 100 cPs has an actual value of 101.5 cP at 25ºC. 1) Calculate the full scale viscosity range either by using the Spindle Range Coefficient in Appendix B of More Solutions to Sticky Problems or by using the Auto Range button on your viscometer. The Spindle Range Coefficient for the 21 spindle on an LV Torque instrument is 4,688. At 6 RPM, the Full Scale Range (FSR) viscosity is 781 cP. Allow +/- 1% for the viscometer and +/- 1% for the Small Sample Adapter. Total allowable accuracy is: +/- 2% x 781 cP = +/- 15.6 cP A similar calculation at 12 RPM gives FSR = 391 cP: +/- 2% x 391 cP = +/- 7.8 cP A similar calculation at 30 RPM gives FSR = 156 cP: +/- 2% x 156 cP = +/- 3.1 cP 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. Brookfield Engineering Labs., Inc. Page 77 Manual No. M13-167...
  • Page 78 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 = +/- 4.1 cP 4) Therefore, at each speed, the acceptable windows within which the measured viscosity value must lie is calculated relative to the viscosity value of the standard: At 6 RPM: 84.9 cP to 118.1 cP At 12 RPM: 91.7 cP to 111.3 cP At 30 RPM: 97.4 cP to 105.6 cP If your measured values fall outside of these windows, contact Brookfield or your authorized dealer to discuss your results and determine whether your instrument is out of calibration. Brookfield Engineering Labs., Inc. Page 78 Manual No. M13-167...

  • Page 79: Appendix F: The Brookfield Guardleg

    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. Early RV guard legs attached to the dial housing and LV guard legs attached to the bottom of the pivot cup with a twist and lock mechanism. 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. It’s shape (shown in Figure F-1 and F-2) is designed to accommodate the spindles of the appropriate spindle set; therefore, the RV guard leg is wider than the LV due to the large diameter of the RV #2 spindle. They are not interchangeable. The calibration of the Brookfield Viscometer/Rheometer is determined using a 600 mL Low Form Griffin Beaker. The calibration of LV and RV series instruments includes the guard leg. The beaker wall (for HA/HB instruments) or the guard leg (for LV/RV instruments) define what is called the “outer boundary” of the measurement. The spindle factors for the LV, RV, and HA/HB spindles were developed with the above boundary conditions. The spindle factors are used to convert the instrument torque (expressed as the dial reading or %Torque value) into centipoise. Theoretically, if measurements are made with different boundary conditions, e.g., without the guard leg or in a container other than 600 mL beaker, then the spindle factors found on the Factor Finder cannot be used to accurately calculate an absolute viscosity. Changing the boundary conditions does not change the viscosity of the fluid, but it does change how the instrument torque is converted to centipoise. Without changing the spindle factor to suit the new boundary conditions, 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 (Note: RV/HA/HB #1 spindle is not included in standard spindle set). Any other LV (#3 & #4) or RV (#3 - #7) spindle can be used in a 600 mL beaker with or without the guard leg to produce correct results. The HA and HB series Viscometers/Rheometers are not supplied with guard legs in order to reduce the potential problems when measuring high viscosity materials. HA/ HB spindles #3 through #7 are identical to those spindle numbers in the RV spindle set. The HA/HB #1 & #2 have slightly different dimensions than the corresponding RV spindles. This dimensional difference allows the factors between the RV and HA/HB #1 & #2 spindles to follow the same ratios as the instrument torque even though the boundary conditions are different. The recommended procedures of using a 600 mL beaker and the guard leg are difficult for some customers to follow. The guard leg is one more item to clean. In some applications the 500 mL of test fluid required to immerse the spindles in a 600 mL beaker is not available. In practice, a smaller vessel may be used and the guard leg is removed. The Brookfield Viscometer/Rheometer will produce an accurate...
  • Page 80 3 3/16 1 7/16 Figure F-1 - Brookfield Guard Leg B-21KY B-20KY Guard Leg Guard Leg For RV Torque For LV Torque 5 7/8 5 5/32 3 3/16 1 7/16 Figure F-2 - Brookfield EZ-Lock Guard Leg Brookfield Engineering Labs., Inc. Page 80 Manual No. M13-167...

  • Page 81: Appendix G: Speed Selection

    Appendix G - Speed Selection Brookfield V iscometers offer a variety of speeds to provide for a wide range of viscosity measurement capabilities. Brookfield has traditionally supplied a defined set of speeds with specific Torque ranges: 0.3, 0.6, 1.5, 3.0, 6.0, 12, 30, 60 0.5, 1.0, 2.0, 2.5, 4.0, 5.0, 10, 20, 50, 100 The DV2T and earlier DV-II series Brookfield Viscometers offer additional speeds to enhance measurement capabilities. The DV2T offers speeds from 0.1 - 200 RPM with two options for speeds selection: numeric key pad for direct entry; Scroll List. The user can choose from these two entry options by using the Navigation Bar (see Section IV.3: Global Settings). The Scroll List is the format used with previous versions of the DV-II viscometer. You may choose the Scroll List to provide the viscometer user with a familiar method for speed selection. The Scroll List can be customized to limit the available speeds and to add new speeds to the list of standard speeds. Brookfield Engineering Labs., Inc. Page 81 Manual No. M13-167...

  • Page 82: Appendix H: Laboratory Stand

    Item Part No. Description VS-CRA-14S Upright Rod and Clamp Assembly VS-CRA-18S Upright Rod and Clamp Assembly Optional GV-1201 Base, includes 2 GV-1203 leveling screws GV-1203 Leveling Screws available separately or in assembly above 2 502028071S33B Flat Washer 5/16 X 7/8 X .071 50S311832S01B Screw, 5/16 - 18 X 1” Hex Head Figure H-1: Model G Laboratory Stand Brookfield Engineering Labs., Inc. Page 82 Manual No. M13-167...
  • Page 83 Actuation lever for up/down movement Item Part No. Description VSQA-001Y Upright Rod and Clamp Assembly GV-1201 Base, includes 2 GV-1203 leveling screws GV-1203 Leveling Screws available separately or in assembly above 2 502028071S33B Flat Washer 5/16 X 7/8 X .071 50S311832S01B Screw, 5/16 - 18 X 1” Hex Head Figure H-2: Model Q Laboratory Stand Brookfield Engineering Labs., Inc. Page 83 Manual No. M13-167...
  • Page 84 Caution: Do not use the DV2T Viscometer with any laboratory stand that does not utilize the GV-1201 base. This large base is necessary for stability of the DV2T Viscometer during use. Earlier versions of the Brookfield Laboratory Stand including the Model A and Model S should not be used with the DV2T.

  • Page 85: Appendix I: Dve-50A Probe Clip

    LV Guard Leg RTD Temperature Probe Assembly B-20KY DVE–50 Probe Clip Probe Clip DVE-50 R TD Temperatur e Probe Brookfield 600 mL Low Form Griffin Beaker Figure I-3 Figure I-2 Brookfield Engineering Labs., Inc. Page 85 Manual No. M13-167...

  • Page 86: Appendix J: Fault Diagnosis And Troubleshooting

    Inaccurate Readings ❏ ✓ Verify spindle, speed and model selection. ✓ Verify spindle selection is correct on DV2T. ✓ If % readings are under-range (less than 10%), the display will flash; change spindle and/or speed. ✓ “ ” on the digital display means the unit is over-range (greater than 100%); reduce speed EEEE and/or change spindle. ✓ Verify test parameters: temperature, container, volume, method. Refer to: • “More Solutions to Sticky Problems”, Section III • “DV2T Viscometer Operating Instructions”, A ppendix C: Variables in Viscosity Measurements ✓ Perform a calibration check; follow the instructions in Appendix E. ✓ Verify tolerances are calculated correctly. ✓ Verify the calibration check procedures were followed exactly. If the unit is found to be out of tolerance, the unit may be in need of service. See Appendix M for details on Warranty Repair and Service. Brookfield Engineering Labs., Inc. Page 86 Manual No. M13-167...
  • Page 87 • Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair (see Appendix M). * This procedure does not apply to instruments with ball bearing suspension (see Section I.3). Display Reading Will Not Stabilize ❏ ✓ Special characteristic of sample fluid. There is no problem with the viscometer. • Refer to Appendix C. ✓ Check for erratic spindle rotation. • Verify power supply • Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair. ✓ Bent spindle or spindle coupling. • Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair. ✓ Temperature fluctuation in sample fluid. • Use temperature bath for control. Brookfield Engineering Labs., Inc. Page 87 Manual No. M13-167...

  • Page 88: Appendix K: Instrument Dimensions

    Appendix K - Instrument Dimensions Brookfield Engineering Labs., Inc. Page 88 Manual No. M13-167...

  • Page 89: Appendix L: Online Help And Additional Resources

    Brookfield has its own YouTube channel. Videos posted to our website can be found here as well as other “home-made” videos made by our own technical sales group. ViscosityJournal.com Brookfield is involved with a satellite website that should be your first stop in viscosity research.

  • Page 90: Appendix M: Warranty Repair And Service

    Suite 905, South Tower, Xindacheng Plaza 193 Guangzhou Da Dao Bei, Yuexiu District Guangzhou, 510075 P. R. China Telephone: (86) 20/3760-0548 FAX: (86) 20/3760-0548 www.brookfield.com.cn On-site service at your facility is also available from Brookfield. Please contact our Service Department in the United States, United Kingdom, Germany or China for details. Brookfield Engineering Labs., Inc. Page 90 Manual No. M13-167...
  • Page 91 This tear-off sheet is a typical example of recorded test data. Please photocopy and retain this template so that additional copies may be made as needed.

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