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DVIII+ - RP SERIES OPERATORS MANUAL

1. LV or RV in the model designation should have the guard leg attached Table EI Normal 25 C Standard Fluids High Temperature Standard Fluids Viscosity cP Viscosity cP Three Viscosity Temperatures 5 5 000 HT 30 000 10 12 500 HT 60 000 50 30 000 HT 100 000 100 60 000 500 100 000 25 C 93 3 C 149 C 1 000 Refer to Brookfield catalog for more information Table E2 MINERAL OIL VISCOSITY STANDARD FLUIDS BEL Part No Viscosity cP 25 C B31 31 B210 210 B750 750 B1400 1 400 B2000 2 000 B11000 11 000 B20000 20 000 B80000 80 000 B200000 200 000 B420000 420 000 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 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 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 duplic
2. C D E F Assemble and level the rheometer Section I 5 Autozero the rheometer Section II 1 Enter the spindle number using the SELECT SPINDLE key Section II 3 Introduce the spindle into the sample and attach the spindle to the coupling nut NOTE Left hand threads Enter the speed of rotation using the number pad and ENTER key Section 11 4 Record 46 torque and viscosity Ill 2 Preparation A B RHEOMETER The DV III should be turned on leveled and autozeroed The level is adjusted using the three feet on the bottom of the base and confirmed using the bubble on the top of the head Adjust the feet until bubble is inside the center target Set the level prior to autozero and check the level prior to each measurement Proper level is essential for correct operation of the DV III SAMPLE The fluid to be measured sample must be in some container Many spindle systems from Brookfield are supplied with specific sample chambers such as the Small Sample Adapter UL Adapter and Thermosel The standard spindles supplied with the DV III LV 1 4 RV 1 7 and HA HB 1 7 are designed to be used with a 600ml low form Griffin beaker or equivalent container with a diameter of 8 25 cm Brookfield recommends that you use the appropriate container for the selected spindle You may choose to use an alternate container for convenience however the accuracy of the measured viscosity may be affected The DV III is calib
3. N M2 D CM2 10 Ed El pri Temperaturer OUT OF RANGE INDICATORS The DV III is capable of measuring instrument torque within the range of 0 to 100 Based on this measurment viscosity and shear stress are calculated Brookfield recommends that data be collected only in the range of 10 to 100 Any data collected outside of this range is considered invalid The DV III provides the following display indicators when the measurement point is outside of the 10 100 acceptable range TORQUE GREATER THAN 100 When Rheometer torque exceeds 100 the parameter display field will show EEEE for torque viscosity and shear stress rs RPM i112 SPIMDLE 31 TEMP 72 1 F PRTH TORGUE EEEE 3 Figure 8 6 TORQUE LESS THAN 10 When Rheometer torque drops below ten 10 percent the Rheometer will continue to display measurement 96 cP D cm values with units flashing Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Figure 9 6 TORQUE LESS THAN 0 When Rheometer torque drops below zero 0 percent the Rheometer will continue to display torque values preceded by a minus sign The viscosity and shear stress field will display dashes as indicated in the next screen display ee SPINDLE 31 PRTH D CH2 Ao Figure 10 Il 3 Spindle Entry The user can elect to change the spindle selection by pressing the SELECT SPDL key The DV III control pr
4. Note Note RV HA HB III Minimum viscosity 3 cP 6 cP and 24 cP at 230 9 RPM 10 of full scale range Manual No M 98 211 A1199 Brookfield Engineering Laboratories Inc Page 58 Din Adapter Viscosity cP LVDV III RVDV III HADV III HBDV III 0 6 5 000 6 1 5 000 12 2 5 000 48 8 5 000 1 8 10 000 18 2 10 000 36 5 10 000 146 10 000 5 7 50 000 61 0 50 000 121 50 000 485 50 000 Spiral Adapter Spiral Shear Rate Viscosity cP Spindle sec 1 LVDV III RVDV III HADV III HBDV II1 SA 70 677 67 7 98 4 98 416 1 050 1 050 000 2 100 2 100 000 8 400 8 400 000 1 100 RPM Cone Plate Rheometer Shear A Cone Rate Viscosity cP Spindle sec 1 LVDV III C P RVDV III C P HADV II IC P HBDV II IC P O 1500 0 15 3 065 1 7 32 700 3 3 65 400 13 1 261 000 6 2 122 800 12 3 245 600 49 1 982 400 3 2 64 000 6 4 128 000 25 6 512 000 25 6 512 000 51 2 1 024 000 205 0 4 096 000 pe 0 pe 0 49 2 983 000 98 3 1 966 000 393 0 7 864 000 Viscosity cP T Bar Spindle LVDV III RVDV III HADV III HBDV III 156 187 460 2 000 200 000 4 000 4 000 000 16 000 16 000 000 312 374 920 4 000 400 000 8 000 8 000 000 32 000 32 000 000 780 937 300 10 000 10 000 000 20 000 20 000 000 80 000 80 000 000 1 560 1 874 600 20 000 20 000 000 40 000 40 000 000 160 000 160 000 000 3 900 4 686 50
5. SPEED 03 RPM 10 0 TIME INTERVAL 00 05 SPEED 04 RPM 20 0 TIME INTERVAL 00 05 SPEED 05 RPM 50 0 TIME INTERVAL 00 05 FOR SPEED SETS WITH ZERO STEP TIMES Program Use Programmer BROOKFIELD DV III RHEOMETER DATA FOR SPEED SET 8 SPEED 01 RPM 10 0 TIME INTERVAL 00 00 SPEED 02 RPM 20 0 TIME INTERVAL 00 00 SPEED 03 RPM 30 0 TIME INTERVAL 00 00 SPEED 04 RPM 40 0 TIME INTERVAL 00 00 Since speed sets can contain twenty five 25 separate speeds printing the speeds that comprise a speed set will be of great help in allowing the user to fully exercise the power of the DV III After the printing is complete the user will be returned to the display of Figure 28 CLEARING A SPEED SET FROM MEMORY Since 10 speed sets can be retained in memory the user may eventually use all the available speed set slots The user may also have programmed speed sets that are no longer required and would like to remove Assume that the user had programmed a new speed set 3 above If he wished to permanently remove that new speed set or any other INMEMORY speed set he would while in the screens of Figure 21 press the 2 key and be presented with CLEAR SPEED IH MEH IH CLEAR 5 Figure 30 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 This screen advises that there are 7 speed sets in memory speed set 3 is in use and that the DV II is awaiting input for the speed set t
6. The speed set included a time interval that was equal to zero minutes and zero seconds Print mode has been set to non continuous mode i e output will be sent to the printer only when the user presses the ENTER key With the above items in effect our default display screen will appear as follows after the PROGRAM steps have been completed PRTH 2 ENTER Bo Figure 39 Or if the user had selected the LOCKOUT option the default screen above would appear as in Figure 40 below E RFM 112 LK SPDL 31 TEMP 72 1 F FATH SET 5 a B Az ENTER TORGUE i Figure 40 Here the LOCKOUT mode is indicated by the revision to the top line of Figure 40 where SPINDLE has been contracted to SPDL and the two letter combo LK is being used to indicate the LOCKOUT condition Please note that while TORQUE is presently being displayed there is nothing to prevent the user from pressing the SELECT DISP key to change the data display item The item to note here is the message being displayed on line 3 informing the user that the program is at speed 02 of the 12 speeds comprising speed set 02 The DV III will continue to operate at 112 RPM until the ENTER key is pressed At that point pressing the ENTER key two distinct events will occur 1 The DV III will ramp up or down to programmed speed 03 and 2 Since the printeris On PRTN the data corresponding to the last speed 112 RPM that existed at the time
7. See Section VI for details The programs are loaded onto the DV III Loaded pro grams cannot be deleted but can be overwritten The B E V I S program menu is accessed by pressing the PROG key and selecting number 2 2 B E V LS The loading and execution of B E V I S programs are described in the following sections 6 B E V I S PROGRAMS MENU B E V I S operations are accessed by pressing the 2 key when in the PROGRAM MODES menu The user is immediately presented with DOREM B E U I 5 PR GRRHS PROGRAM 3 IS IM USE i SELECT DOWLOAD 2 RUN er Figure 50 This screen informs the user that the B E V LS program in storage slot 3 is current last used and that it may be run by pressing the 2 key or another program may be selected by pressing the 2 key It should be noted that entrance to the B E V I S program mode makes the last used program available for printing or running Thus the user seeing that a program was resident in slot 3 could have printed it directly from the above screen by pressing the front panel PRINT key SELECTING AND DOWNLOADING B E V I S PROGRAMS To select a program the user presses the 1 key and is presented with SELECT R P FIVAILABLE IH HEFIORA CURRENT 3 Bee Figure 51 The user is informed that the current or last used program is no 3 that programs 0 1 2 3 and 4 are available for immediate use and that five 5 slots 5 6 7 8 and 9 are em
8. a Brookfield Engineering Labs temperature controller is attached to the rheometer STZ N A Sets the data print timer clock back to zero PDN N A The DV III immediately prints a data string to the selected printer serial or parallel as selected in the DV III menus PLN 16 character or less The DV III prints the specified message to the selected printer serial text message or parallel as selected in the DV III menus NOTE MM SS is minutes seconds Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 By using various combinations of the above commands programs are created that automatically control the viscometer and collect data via an attached printer from the DV III2 Rheometer The RheoLoader software is a Windows 95 or above based program used to create save print and downlaod B E V LS programs to the DV III Rheometer Start the software by clicking on its associated icon or by clicking the Start button select Run enter the name of the progrram to execute Rheoad exe then click OK This is 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 Highlight a command in the list box to the right of this grid then click on the Insert button to insert the command into the highlighted line of the grid This same insertion task can also be accomplished by double clicking o
9. a given program step The current step being executed WTI0330 is shown as well as the next step to be executed PDN The bottom line displays the current program Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 step the total number of steps 02 39 and any time intervals if they are relevant The WKY command message could be displayed on the bottom line in lieu of the step and time info This screen stays resident until the user presses the OPTIONS TAB key which toggles back and forth between this screen and an amended default screen shown next a RPM B B SPINDLE 34 TEMP 72 1 C PATH BEVIS PROG RUNNING Be TORGUE aa AOS Figure 56 a m The user now sees viscosity data and can use the SELECT DISPLAY key to view other viscosity measurement parameters Pressing the OPTIONS TAB key from now on will toggle between the screens of Figure 55 and Figure 56 The program code will automatically switch back to the program progress screen Figure 55 above if a conditional has been reached the end of a program step is reached or user input is required If no user input is required the B E V LS program proceeds to the next step without switching back to the progress screen IV 4 Choosing the Best Data Collection Method The DV III offers 3 methods for data collection Single Speed DV III Speed Time Pairs and B E V LS Programs The decision of which technique is best should be made considering the tes
10. also accessed from this menu The Options Menu is shown in Figure 61 Selections are made by pressing the appropriate number key ny OPTIONS MENU SETUP 4 SET TEMP PRINT 5 DATA 6 TIMED 8 ALARMS Figure 61 V 1 Set Up 1 Change the units of temperature The change is selected by pressing thel key The change must be confirmed by pressing the ENTER key 2 Change the units of viscosity and shear stress CGS System cP D cm2 SI System mPaes N m2 The change is selected by pressing the 2 key The change must be confirmed by pressing the ENTER key Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 3 Change communication status with external Brookfield temperature controller An off indication means that there is no communication with a controller Selecting this option will make the DV III try to establish communication When communication is established off will be change to on Temperature control will always be set to off when the DV III is turned on When communication is established Line 1 of the default screen will be modified The temperature field will show CTLR in place of TEMP Communication may only be established with Brookfield controllers Thermosel Controllers HT 106 HT 104 Bath Controllers HT 107 HT 105 The change is selected by pressing the 3 key Subsequent key presses required will be indicated on the display 4 Changethe temperature display by
11. be combined to calculate the total allowable error The DV III is accurate to 1 of any full scale spindle speed viscosity range Brookfield Viscosity Standards Fluids are accurate to 1 of their stated value Example Calculate the acceptable range of viscosity using RVDV III with RV 3 Spindle at 2 RPM Brookfield Standard Fluid 12 500 with a viscosity of 12 257 cP at 25 C 1 Calculate full scale viscosity range using the equation Full Scale Viscosity Range cP TK SMC no Where TK 1 0 from Table D2 SMC 10 from Table D1 Full Scale Viscosity Range 110 10 000 50 000 cP The viscosity is accurate to 500 cP which is 1 of 50 000 2 The viscosity standard fluid is 12 257 cP Its accuracy is 1 of 12 257 or 122 57 cP 3 Total allowable error is 122 57 500 cP 622 57 cP 4 Therefore any viscosity reading between 1 1 634 4 and 12 879 6 cP indicates that the Rheometer is Operating correctly Any reading outside these limits may indicate a Rheometer problem Contact the Brookfield technical sales department or your local Brookfield dealer distributor with test results to determine the nature of the problem Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 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
12. can not be analyzed with standard math models This turbulence creates a falsely high Rheometer reading with the degree of non linear increase in reading being directly related to the degree of turbulence in the fluid For the following geometries we have found that an approximate transition point to turbulent flow occurs 1 No 1 LV Spindle 15 cP at 60 RPM 2 No 1 RV Spindle 100 cP at 50 RPM 3 UL Adapter 0 85 cP at around 70 RPM 4 SC4 18 13R 1 25 cP at around 240 RPM Turbulent conditions will exist in these situations whenever the RPM cP ratio exceeds the values listed above Brookfield Engineering Laboratories Inc Page 60 Manual No M 98 211 A1199 APPENDIX C Variables in Viscosity Measurements As with any instrument there are variables that can affect a viscosity measurement These variables may be related to the instrument Rheometer or the test fluid Variables related to the test fluid deal with the rheological properties of the fluid while instrument variables would include the Rheometer design and the spindle geometry system utilized RHEOLOGICAL PROPERTIES Fluids have different rheological characteristics that can be described by Rheometer measurements We can then work with these fluids to suit our lab or process conditions There are two categories of fluids Newtonian These fluids have the same viscosity at different Shear Rates different RPM s and are called Newtonian over the Shear Rate range they
13. cup and place the viscosity standard fluid into the cup waiting 10 minutes for temperature equilibrium 5 Connect the sample cup to the Rheometer Allow sufficient time for temperature to reach equilibrium Typically 15 minutes is the maximum time that you must wait Less time is required if spindle and cup are already at test temperature 6 Measure the viscosity and record the Rheometer reading in both torque and centipoise cP Notes 1 The spindle must rotate at least five 5 times before a viscosity reading is taken 2 The use of Brookfield Viscosity Standard fluids in the range of 5 cP to 5000 cP is recommended for cone plate instruments Please contact Brookfield Engineer ing Laboratories or an authorized dealer if your calibration procedure requires more viscous standards 3 Select a viscosity standard fluid that will give viscosity readings between 10 and 100 of full scale range Refer to Appendix B for viscosity ranges of cone spindles Do not use a silicone viscosity standard fluid with a viscosity value greater than 5000 cP with a Cone Plate Viscometer Brookfield offers a complete range of mineral oil viscosity standards suitable for use with Cone Plate Viscom eters as shown in Table E2 Consult with Brookfield or an authorized dealer to determine which fluid is appropriate Interpretation of Calibration Test Results When verifying the calibration of the DV III the instrument and viscosity standard fluid error must
14. here to input the step time as was used to enter the RPM above Speed or time data that is out of range as defined by Table 1 will result in the following screen INURLID DATA ENTRY BAD SPEED TIME RE ENTER AOS Figure 24 This screen will be displayed for 1 3 seconds When ready the user may press the PROG RUN key to display the data for the next step in the program or the MOTOR ON OFF ESCAPE key whereby none of the changes up to that point will be accepted to return to the screen of Figure 22 To end a program the user simply enters and accepts astep RPM and Time of zero 0 or continues to input step data until the program reaches the twenty five 25 step program limit In either case the following screen will be displayed a PROGRAM 3 COMPLETE ENTER EDIT A FPGM CLEAR SPEED SET USE SPEED SET Figure 25 To use the currently selected speed set press the 3 key in Figure 25 This would immediately revert to the default screen modified as follows a RPH B B SPINDLE TEMP 72 1 F FATO SPEED SET 3 SELECTED TORGUE Figure 26 Note If at this point prior to using the program the user wished to enter a direct speed a press of any numeric key which would result in a display similar to Figure 15 At the completion of the direct speed input the display would revertto Figure 26 above with the appropriate RPM displayed and the viscometer running at that speed Brookfield Engin
15. is already data in the data buffer the user will be presented with the following screen MATH MODELS ASSON 4 PHR LAH 5 PASTE Figure 58 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 The user is informed that there are five 5 math models which can be used on the buffer data A model is selected by pressing the appropriate numeric key No matter the model selected the following screen will be displayed for the duration of the mathematical analysis MATH MODEL CALCULATING Figure 59 When the calculations are complete the results for the particular model will be displayed as follows YIELD ST CONF OF FIT Figure 60 This screen for the Standard CASSON Model is typical for all five 5 of the math models Note the cP in the upper right hand corner to remind the user that the values are cP based It could have been SI if the user had opted for SI display in the SETUP menu as shown on the next two 2 of the following four 4 math model screens The user may elect to print test results in order to obtain hard copy results This is accomplished by pressing the PRINT key while any of the above screens are being displayed causing the following to be printed 6 STANDARD CASSON PRINTOUT Sample Name Operator Name Date 01 14 1999 Time 02 27 Math Model Results CASSON STANDARD Model HB Spindle 34 Plastic Viscosity 1906 3 cP Yield Stress 1976 88 D CM2 C
16. is also connected to a computer Com Port 2 The controller must also be connected to the control device Thermosel or bath with the appropriate load cable STRIP CHART RECORDER DVP 96Y cable is used to connect the serial port on the DV III to the input block of the strip chart recorder This cable is supplied with a Brookfield strip chart recorder Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 1 7 Key Functions Figure 4 shows the control keys on the face of the DV II Rheometer The following describes each key s function AUTO RANGE PROG SELECT SPDL PROG RUN YES SELECT DISP PRINT 2 SI DHL Figure 4 MOTOR ON OFF ESCAPE Turns the motor on or off Cancels any operation returns the user to the previous screen AUTORANGE Presents the maximum 100 torque viscosity attainable using the selected spindle at the current speed o AUT RANGE z SELECT SPDL Allows selection of the spindle to be used si SELECT DISP Selects the parameter to be displayed e 7 Rheometer Torque 96 cP Viscosity cP or mPa s SS Shear Stress Dynes cm2 or Newtons m2 SR Shear Rate 1 Sec OPTION TAB Accesses options menu See Section V Toggles between selectable items when indicated PRINT PRINT Sends a single line of data to an attached printer Selects printing and non printing mode as selected in the Options menu Brookfield Engineering L
17. mode with a non zero time interval would result in the following display RFH 112 LK SPDL 31 2 1 PRTH 34 FROG Figure 44 Here the useris informed that speed set 2 is being used starting with speed number four and ending at speed 08 while currently executing speed 04 After the first speed number 04 is completed the display would be updated to show the new speed and the step display would now reflect the current executing step number as in Figure 45 below SPIHDLE 231 i PRTO LIE 7 45 PROG TORQUE EN PE Figure 45 If the speed set contained no time interval the selection of a subset of speeds would result in a screen display as shown in Figure 46 p oc RPH 112 SUB z dH TORQUE oS Figure 46 Brookfield Engineering Laboratories Inc Page 32 Manual No M 98 211 A1199 The step number would be incremented each time the user pressed the ENTER key Assume that the speed corresponding to step 04 was executing If the user presses the ENTER key our display will be updated as shown in Figure 47 Figure 47 6 PROGRAMMED SPEED STOP The user may stop program mode operation at any time by pressing the MOTOR ON OFF ESCAPE key anytime during program operation The following message would be displayed PROGRAM STOPPED PRESS AMY KEY pe Figure 48 The viscometer motor would be automatically turned OFF and the default screen display Figure 37 wou
18. non Newtonian fluid will produce a curve when test data is plotted on a shear stress vs shear rate graph The math model will force the data into a straight line and describe it with a slope and y intercept The terminology associated with the slope and y intercept vary from model to model as does the interpretation of results The DV HI does not allow for data sets to be edited Programs must be constructed to conform with the following data requirements if math models are to be used e The data set must contain non zero values for shear stress and shear rate except for the paste model which requires non zero viscosity and RPM There cannot be two equal adjacent shear rate values RPM values for paste model e torque values of all data points must be between 0 1 and 100 If any of the above circumstances are violated an error message will appear when a math model is selected ERROR 1 A torque value is less than 0 1 A shear stress or shear rate value is zero ERROR 2 A torque value is greater than 100 ERROR 3 Reserved ERROR 4 Two adjacent speeds of equal value Math models for data analysis are accessed by pressing the PROG key and then 3 3 Models Figure 20 If no data i e no data at all or less than two 2 data points is in the data buffer no modeling can be performed and Figure 57 will be displayed ERROR YOU CANNOT EXECUTE A MATH MODEL BECAUSE HO CATA IS IM BUFFER AOS Figure 57 If there
19. 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 The Viscometer should be shipped in its carrying case together with all spindles originally provided with the instrument For repair or service ita UI GI ESCTGER return to Brookfield Engineering Laboratories Inc 11 Commerce Boulevard Middleboro MA 02346 U S A Telephone 508 946 6200 FAX 508 946 6262 http www brookfieldengineering com For repair or service USC ERU T VII RCG consult Brookfield Engineering Laboratories Inc or the dealer from whom you purchased the instrument For repair or service in the VATIC hp RT return to Brookfield Viscometers Limited 1 Whitehall Estate Flex Meadow Pinnacles West Harlow Essex CM19 5TJ United Kingdom Telephone 44 27 945 1774 FAX 44 27 945 1775 For repair or service in HE A etum to Brookfield Engineering Laboratories Vertriebs GmbH Barbarossastrasse 3 D 73547 Lorch Germany Telephone 49 7172 927100 FAX 49 7172 927105 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Packaging Instructions to Return a Viscometer for Repair or Calibration L Remove and return all spindles properly packed for shipping L Clean excess testing material off the instrument L Include MSDS sheets for all materials tested with this instrument L Support pointe
20. stored in a memory slot Entry to this method would typically be from Figure 22 after selecting an IN MEM program slot or by pressing the 1 key in Figure 21 having just finished entering a program In either case the user is presented with REVIEW SPEED SET 3 STEP G1 OF amp STEP RPM STEP TINE Figure 28 Operation in this mode is exactly the same as for entering a new speed set all key actions and speed and time limits are the same At this point the user may continue to review modify the speeds comprising speed set 3 or elect to print a listing of the speeds in this speed set To accomplish this the user must be in the program Enter Edit mode have selected or programmed a speed set which contains more than two 2 speeds and then press the PRINT key If all is well i e satisfied the above requirements the rheometer will display Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 PRINT SPEED SET 3 READY PRINTER THEN PRINT KEV Figure 29 This message simply asks the user to make sure the printer is ready it s on line and has paper in it and then awaits for the PRINT key to be pressed When it is pressed the DV III will send the following data to the attached printer FOR SPEED SETS WITH FINITE STEP TIMES Program Use Programmer BROOKFIELD DV III RHEOMETER DATA FOR SPEED SET 9 SPEED 01 RPM 2 5 TIME INTERVAL 00 05 SPEED 02 RPM 5 0 TIME INTERVAL 00 05
21. the ENTER key was pressed will be sent to the attached printer Thus if 12 speeds comprised the selected speed set then the user would be required to press the ENTER key 12 times to exercise the entire speed set After the last speed has been executed i e the user pressed the ENTER key for the twelfth time the viscometer speed will be set at ZERO RPM and the following message will be displayed Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 FROGRAM COMPLETE PRESS EITHER ENTER OF PROGRAM RUN ee Figure 41 Pressing the ENTER key would return the user to the default screen as depicted in Figure 40 or to the program start and stop limit selections of Figure 34 if the PROG RUN key is pressed 6 USING PROGRAMMED SPEEDS WITH A NON ZERO TIME INTERVAL Assume the following e A speed set has been selected A subset of the speed set has not been selected i e we ll use all of the speeds in the speed set Thespeedsetincludeda time interval that was greater than zero 0 minutes and zero 0 seconds Print mode has been set to non continuous mode i e output will be sent to the printer only when the user presses the ENTER key With the above items in effect our default display screen will appear as follows after the program steps have been completed __ GEN RPM liz LK SPOL 234 FATH SET 2 PROG TORGUE m Figure 42 The difference between this mode and the zero time
22. 0 50 000 50 000 000 100 000 100 000 000 400 000 400 000 000 7 800 9 373 000 100 000 100 000 000 200 000 200 000 000 800 000 800 000 000 In taking viscosity measurements with the DV III Rheometer 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 spindle speed combination 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 All DV IIT2 Rheometers have a Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 full scale range precision of 1 of any spindle speed combination We discourage taking readings below 10 of range because the potential viscosity error of 1 is a relatively high number compared to the instrument reading The second consideration involves the mechanics of fluid flow All rheological measurements of fluid flow properties should be made under laminar flow conditions Laminar flow is flow wherein all particle movement is in layers directed by the shearing force For rotational systems this means all fluid movement must be circumferential When the inertial forces on the fluid become too great the fluid can break into turbulent flow wherein the movement of fluid particles becomes random and the flow
23. 145 Guard Leg LVDV III7 B 20Y RVDV III B 21Y Carrying Case DVP 71Y RHEOLOADER Software DVP 201Y Cable DV III to Computer DVP 80 Operator Manual M 98 211 Please check to be sure that you have received all components and that there is no damage If you are missing any parts please notify Brookfield Engineering or your local Brookfield agent immediately Any shipping damage must be reported to the carrier Brookfield Engineering Laboratories Inc Page 4 Manual No M 98 211 A1199 1 2 Utilities Autosensing Power Supply Input Voltage 90 260 VAC Input Frequency 47 440 Hz Power Consumption Less than 20 Watts Power Cord Color Code Hot live Black Brown Neutral White Blue Ground earth Green Green Yellow 1 3 Specifications Speed Range 0 01 250 RPM 0 01 RPM increments from 0 01 to 0 99 RPM 0 1 RPM increments from 1 0 to 250 RPM Viscosity Accuracy 1 0 of full scale range for a specific spindle running at a specific speed Temperature sensing range 100 C to 300 C 148 F to 572 F Temperature accuracy 1 0 C from 100 C to 150 C 2 0 C from 150 C to 300 C Analog Torque Output 0 1 Volt DC 0 100 torque Analog Temperature Output 0 4 Volts DC 10mv C Centronics Compatible Parallel Port for use with attached printer RS232 Compatible Serial Port for use with attached printer PC or Brookfield Temperature Controller Weight Gross Weight 35 Ibs 15 9 kg Net Weight
24. 3 3 Measured Temperature The current temperature as measured by the attached temperature probe If no probe is connected four dashes will be displayed 4 Printing Status Indicates the currently selected method of printing See Section II 5 5 Measured Data Instrument Torque 96 Viscosity cP Shear Stress D cm2 Shear Rate s 1 The parameters are toggled from one to another using the Select Display key Note Shear Stress and Shear Rate data cannot be calculated for some spindle geometries In these cases the display will show 0 0 6 Blank Line This line is used to display entry data when selecting a spindle or speed of rotation Additionally selected programs available for running will be identified here when in the Program mode See Section IV 2 The default screen will appear at the completion of the AUTOZERO sequence each time the DV III is turned ON in the standalone mode see Section II 6 for external control mode The displayed data may be changed as described in the following sections The format for data displayed in the default screen and all other screens is described in Table 1 For appearance sake the entries in the table have been decimal point aligned Actual rheometer display will have all fields left justified Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 0 01 lt RPM lt 0 99 0 1 lt RPM lt 99 9 100 lt RPM lt 250 Shear Rate 1 SEC
25. 32 Ibs 14 5 kg Carton Volume 2 0 cu ft 0 057 m3 1 4 Data Retention The DV III will save spindle parameters used to calculate centipoise shear rate and shear stress default settings and the test data from the last program test run when the rheometer is turned off or there is a power failure Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 1 5 Set Up 1 Place the upright rod into the hole at the front of the base The rack gear and clamp assembly should face the rear of the base see Figure 1 The upright rod is held in place with the jam nut which is attached from the bottom of the base Tighten this nut with a suitable wrench spanner Clamp Assembly Upright Rod Leveling Screw 3 Jam Nut Rack Gear 4 Base Unit P Figure 1 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 2 Insert the mounting handle on the back of the DV III into the hole on the clamp assembly Figure 2 Bubble Level Rack Gear Clamp Screw Clamp Assembly Upright Rod _ gt Mounting Handle Figure 2 3 Tighten the DV III clamp Screw Figure 2 Note If the clamp assembly moves along the upright rod too freely tighten the tension screw see Appendix F 4 Insert the ribbon cable into the DV III Rheometer head Insert the other end of the ribbon cable into the connect
26. BROOKFIELD DIGITAL RHEOMETER MODEL DV III Operating Instructions Manual No M 98 211 Please record the Model and Serial Number of your viscometer Having this information readily available will help us to assist you should there be any questions regarding your instrument Model No Serial No SPECIALISTS IN THE A KFIELD MEASUREMENT AND CONTROL OF VISCOSITY BROOKFIELD ENGINEERING LABORATORIES INC 11 Commerce Boulevard Middleboro MA 02346 1031 USA TEL 508 946 6200 or 800 628 8139 USA excluding MA FAX 508 946 6262 INTERNET www brookfieldengineering com Vi Contents RETENIR 3 INMEES uS om nc 4 D NES dg Meo c T ger 5 EC edis See ne a E E E E E E E E aes 5 I4 Data Retentores UT m mm 5 dE oU oec M 6 I MEE I ciu m 9 EM occi TP PD mm 10 o UHR 12 Ml PUA OG rm r c 12 IN Bde dbi t e m 13 M3 onini Muppet 15 TEA Direct Speed EDI eite oa en sesess crac cen neni Monti bes iad Gag bU pus tuti sse e abes REEN 16 TES External Art Ol T 17 MAKING VISCOSITY MEASUREMENTS eere 19 MEI Quick Statt M M aS 19 M2 Preparato ieee A em aM E A eaten 19 LL Selecting BS PIMC S S OO acsi qus teta doses ee races inu dut Qa eee ee eats 20 M4 Multiple Data Pointsista EE Oe POCO PES RT Se HRT rene 20 PROGRAMMING THE DV I
27. CALIBRATION 1 Determine the appropriate sample vol ume Refer to Table A1 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 ranges listed apply to CPE cones Do not use a silicone viscosity standard fluid with a viscosity value greater than 5000 cP with a Cone Plate Brookfield offers a complete range of mineral oil viscosity standards suitable for use with Cone Plates for viscosities above 5 000 cP or shear rates above 500 sec see Table E2 in Appendix E for a list of available fluids It is best to use a viscosity standard fluid that will be close to the maximum viscosity for a given cone spindle speed combination Example LVDV III Viscometer Cone Spindle CPE 42 Brookfield Silicone Viscosity Standard having a viscosity of 9 7 cP at 25 At 60 RPM the full scale viscosity range is 10 0 cP Thus the Viscometer reading should be 97 torque and 9 7 cP viscosity 0 197 cP The allowable error 0 197 cP is a combination of Viscometer accuracy and fluid tolerance refer to Interpretation of Calibration Test Results in Appendix E 3 Setthe gap as described in Section A 3 4 With the motor off remove the sample cup and place the viscosity standard fluid into the cup Table A6 Volume Tab
28. HA HB 1 7 Brookfield spindles B Evaluate the Viscometer with Thermosel according to the procedure listed below a Put the proper amount of HT viscosity standard fluid into the HT 2 sample chamber The amount varies with the spindle used Refer to the Thermosel instruction manual b Place the sample chamber into the Thermo Container c Put the spindle into the test fluid and attach the extension link coupling nut and free hanging spindle or directly attach the solid shaft spindle to the DV III d Allow 30 minutes for the viscosity standard sample chamber and spindle to reach test temperature e Measure the viscosity and record the Rheometer reading Note The spindle must rotate at least five 5 times before a viscosity reading is taken Calibration Procedure using UL or DIN UL Adapters 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 III 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 5 Allow 30 minutes for the viscosity standard sample chamber and spindle to reach test temperature 6 Measure the viscosity and record the Rheometer re
29. IIl AND ANALYSIS eese 21 IA Programming Concept PEE 2 IV 2 OVI Speed Time Pair Programming Liuius eio pei pae Se enirn pe eie cepa eeaeee 22 IV 3 Bevis Programs sssi toti uiui actae tec detain sc cadi deu tus EE AEE dam uei bd dup eios 34 IV 4 Choosing the Best Data Collection Method 5eionius inteso betreten oen sue RU beoe eni iu gi 36 I eM Data Analysis E TE 31 EES 40 NVA Set UP T ere tt 40 RE o TC a 4 Vo cio mere E meg cata nae eee 42 VA oci D 43 EM clem 43 MB Tuned Data Callecllol iieii inniit qu sac ces iu nen iei did en pecan nd dibus napa leti dandi 44 ae 47 VLL Description ot D B V LS Commands ogee scescnesdastuteenitedacsnis eyttuadivedebssstalotvesauahatetes 47 LANA Conduit CHI EET o oo 50 APPENDIX A Cone Plate Rheometer Set Up sss 52 APPENDIX B Viscosity Ranges s s sesssesesesesesesesesesesesestsssssssssssssssssesesesesesesesesesesrstsesests 56 APPENDIX C Variables in Viscosity Measurements sees 61 APPENDIX D Spindle and Model Codes sess 63 APPENDIX E Calibration Procedures ceni retain Did ua om IE ud test iaa Er ut i Id 67 APPENDIX F VS 27Y Clamp Assembly sess eene nnne 74 APPENDIX G Warranty Repair and Service eerte tons ornata rona nn etna eren han 75 l INTRODUCTION The Brookfiel
30. TIMES PROG SPEED These programs when executed will automatically progress from step to step based on the time intervals programmed by the user On pressing the 3 key in Figure 22 the user is presented with nee MEM SPEED SET 3 STEP i STEP RPM STEP TIME Figure 23 This screen reminds the user of the speed set that he has selected to program and then allows him to change either the speed or time interval or both for that step Note The time interval on entry to this screen will always be set to 00 05 seconds as the default value The user may of course change it to any valid time of his choice Whenever you change time interval that new time becomes the default interval until it is again changed by the user Also note that zero 0 times are not allowed for program steps after the first step for Finite Step programs Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 The OPTION TAB key is used for moving from input field to input field and the ENTER key to accept the current input for a step On entry to this screen the underscore cursor would be flashing as shown under the first digit of the step RPM Use the numeric keys to make changes to the step speed repeating the input as many times as required until satisfied When satisfied with the speed input press the OPTION TAB key which moves the flashing cursor down to the first character of the time field The same procedure is used
31. aboratories Inc Manual No M 98 211 A1199 pros PROG Access the Programs menu for program creation running or deleting Contstructs a test program Allows you to review modify an existing test program w PROG RUN Execute DV III speed time pair program NUMBER KEYS 0 through 9 Sets speeds and choose items from various dialog screens and the option menu een ENTER Functions as an ENTER key similar to a computer by serving to accept a keyboard entry B Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 ll GETTING STARTED ll 1 Autozero Before readings may be taken the Rheometer must be autozeroed This is done each time the power switch is turned on The Rheometer will guide you through the procedure as follows Turn power switch on as shown in Figure 5 the screen indicates that the DV III is in the standalone mode is not connected to a computer and gives the version of the operating firmware the built in program which controls the instrument and a two digit alphanumeric code which indicates the Model number see Table D2 in Appendix D the code tells the spring torque rating of your Rheometer Q1 BRODKFIELD DU III RHEOMETER Ve Hf STANDALONE fC Figure 5 No key press is necessary After a short pause the display will read REMOVE SPINDLE LEVEL RHEOMETER AND PRESS THE MOTOR ON OFF KEY TO AUTOZERO Before beginning the autozero procedure Brookfield recomm
32. ading Note The spindle must rotate at least five 5 times before a viscosity reading is taken Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Calibration Procedure using a Helipath Stand and T Bar Spindles When a Helipath Stand and T Bar spindles are used Remove the T bar spindle and select a standard LV 1 4 or RV HA HB 1 7 spindle Follow the procedures for LV 1 4 and RV HA HB 1 7 Brookfield spindles outlined above T Bar spindles should not be used for verifying calibration of the DV II Rheometer Calibration Procedure for Spiral Adapter 1 2 3 4 5 6 7 Place the viscosity standard fluid in the proper container into the water bath Attach the spindle to the viscometer Attach chamber SA 1Y and clamp to the viscometer Lower the DV III into measurement position Operate the viscometer at 50 or 60 RPM until the chamber is fully flooded The viscosity standard fluid together with the spindle should be immersed in the bath for a minimum of 1 hour stirring the fluid periodically operate at 50 or 60 RPM periodically prior to taking measurements After 1 hour check the temperature of the viscosity standard fluid with an accurate thermometer If the fluid is at test temperature 0 1 C of the specified temperature normally 25 C measure the viscosity and record the viscometer reading Note The spindle must rotate at least five 5 times for one minute whichev
33. ading 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 amp 2 spindles of the LV and RV spindle sets Any other LV 3 amp 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 amp 2 have slightly different dimensions than the corresponding RV spindles This dimensional difference allows the factors between the RV and HA HB 1 amp 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 a
34. and a second at 50 rpm the two viscosity 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 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 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 Rheometer model 5 Spindle used if using LVDV IIT 4 or RVDV IIT 7 attach the guard leg 6 Test speed or speeds or the shear rate 7 Length of time or number of spindle revolutions to record viscosity Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 APPENDIX D Spindle and Model Codes Each spindle has a two digit code which is entered using the SPDL key on the DV III key pad The entry code allows the DV III 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 calculations and the Shear Rate Constant SRC used for shear rate and shear stress calculations Note that where SRC 0 no shear rate shear s
35. are measured Non Newtonian These fluids have different viscosities at different shear rates different RPM s They fall into two groups 1 Time Independent non Newtonian 2 Time Dependent non Newtonian The time dependency is the time they are held at a given Shear Rate RPM They are non Newtonian and when you change the Rheometer spindle speed you get a different viscosity 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 Rheometer readings from a low to a high RPM and then back to the low RPM and the readings fall upon themselves the materialis time independent pseudoplastic and shear thinning Time Dependent Thixotropic A thixotropic material has decreasing viscosity under constant shear rate If you set a Rheometer at a constant speed recording viscosity cP values over time and find that the viscosity cP values decrease with time the material is thixotropic Brookfield publication More Solutions to Sticky Problems includes a more detailed discussion of rheological properties and non Newtonian behavior Rheometer Related Variables Most fluid viscosities are found to be non Newtonian They are Shear Rate dependent on the measurement conditions The specifications of the Rheometer spindle and chamber geometry will affect the viscosity readings If one reading is taken at 25 rpm
36. ase the currently displayed start step and substitute the new value The user may select a start step less than the end step a so called Up Ramp or a start step greater than the end step a so called Down Ramp Any attempt to enter a start or end speed not contained in the speed set will result in the following display INVALIO DATA ENTRY BAD STEP INPUT k RE ENTER AOS Figure 35 The ENTER key is used to step from the start step entry to the end step entry Repeated pressing of the ENTER key will allow the user to move back and forth between the start and end entries and change them as required until the correct start and end step values have been entered The selected speed set and the start and end steps values entered will be retained in EEProm memory for use the next time the viscometer is powered up in the stand alone mode Pressing the OPTION TAB key at this point results in the following screen display Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 LOCKOUT OFT IONS Enable Lockout Disable Lock Figure 36 LOCKOUT OPTIONS Pressing the 1 key locks out any use of the NUMERIC keys and the PROGRAM SELECT SPINDLE and OPTIONS TAB keys Pressing the 3 key would disable an existing lockout condition only when in the LOCKOUT OPTIONS screen Figure 36 After pressing the 1 or 3 keys the user would be returned to the display of Figure 34 From Figure 34 the user runs the pr
37. ate 1 sec 9 X Re2 Rp2 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Radius of the container in centimeters Rp Radius of the spindle in centimeters Radius at which the shear rate is to be calculated normally the same value as Ry in centimeters Oo Angular velocity of the spindle Rad Sec N Spindle speed in RPM SMC and SRC values are entered in RHEOCALC software See the HELP file for details Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 APPENDIX E Calibration Procedures The accuracy of the DV III 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 El Container size For Viscosity Standards lt 30 000 cP use a 600 ml Low Form Griffin Beaker having a working volume of 500 ml For Viscosity Standards 2 30 000 cP use the fluid container Inside Diameter 3 25 8 25cm Height 4 75 12 1cem Note Container may be larger but may not be smaller Temperature As stated on the fluid standard label 0 1 C Conditions The DV III should be set according to the operating instructions The water bath should be stabilized at test temperature Rheometers with the letters
38. ate 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 4 and RV HA HB 1 7 Brookfield spindles 1 Place the viscosity standard fluid in the proper container into the water bath 2 Lower the DV III into measurement position with guard leg if LV or RV series Rheometer is used 3 Attach the spindle to the Rheometer If you are using a disk shaped spindle avoid trapping air bubbles beneath the disk by first immersing the spindle at an angle and then connecting it to the Rheometer 4 The viscosity standard fluid together with the spindle should be immersed in the bath for a minimum of hour stirring the fluid periodically prior to taking measurements 5 After 1 hour check the temperature of the viscosity standard fluid with an accurate thermometer 6 If the fluid is at test temperature 0 1 C of the specified temperature normally 25 C measure the viscosity and record the Rheometer reading Note The spindle must rotate at least five 5 times before readings are taken 7 The viscosity reading should equal the cP value on t
39. blank line 3 on the default display screen records the user s new speed input as depicted in Figure 15 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 nn RPM B G SPINOLEs31 TEMP 72 19F PRTN ENTER NEW RPHM 11 TORGUE 8 8 amp AOS Figure 15 Here the user intends to enter a speed of 112 RPM has pressed the 1 key twice and is about to press the 2 key If the user makes more than five 5 key presses the DV III control program will roll the cursor back to the first character of the field and begin to overwrite the previous data entry Next the user presses the ENTER key to accept the speed The motor will begin running at 112 RPM and the display will be updated to the next screen image PC RPM il2 SPIMDLE 31 TEMP 72 1 F PRTH TORGUE 55 3 8 fo Figure 16 If the speed entered was not valid the Rheometer will display the following message IMURLID DATA ENTRY BEAD SPEEDL TITIER RE ENTER Figure 17 After a few seconds the display returns to Figure 15 with the speed data field cleared and just the underscore cursor awaiting a new entry 1l 5 External Control The DV III Rheometer can be used in conjunction with Brookfield software RHEOCALC V 2 orhigher Through RHEOCALC all rheometer functions are controlled by the computer The DV I must be set to the external control mode to allow for proper communication with RHEOCALC To configure the e
40. ck YL NL Other Comments L Return the Viscometer to the attention of the Repair Department at the address above L Package the Viscometer for shipment as outlined on the reverse side _J Include a purchase order or purchase order number with this form Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Please photocopy and retain This tear off sheet is a typical example of recorded test data this template so that additional copies may be made as needed woo bulssaulbuapjayyxooiq mMm 2929 956 806 XV4 VIN Xe YSN 6 L8 8Z9 008 10 00Z9 9F6 80S TAL 9VEZO VIN o40ge ppiy PAeAgiNog ad1WWOD LL ONI SAIMOLVHOSVT SNIH33NION3 0731X0048 SNOISNTONOO Qo ETET d ANOYOL ELLE dWal YWaHS ALISOOSIA yOLOVA DINER JIANIdS 1300W ER NOLLVINHOHNI 19311 45 LOY 1831 ALISO9SIA Manual No M 98 211 A1199 5 7 7 pa S p e a l 92 T 7 o 92 f Lu E E 2 X fe pe fea
41. cosity cP or mPaes Yield Stress Dynes cm2 or N m2 Confidence of Fit 3 Bingham Plastic The Bingham equation is T to ND where T Shear Stress To Yield Stress stress at zero shear rate T Plastic Viscosity D Shear Rate The calculated parameters for this model are Plastic Viscosity cP or mPaes Yield Stress Dynes cm2 or N m2 Confidence of Fit 4 Power Law The Power Law equation is T kD where T Shear Stress D Yield Stress stress at zero shear rate k Plastic Viscosity n Shear Rate Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 The calculated parameters for this model are Flow Index no units Consistency Index cP or mPaes Confidence of Fit 5 IPC Paste Analysis This method is intended to calculate the Shear Sensitivity Factor and the 10 RPM Viscosity value of pastes A prime example of its use is in the solder paste industry thus the name IPC Institute for Interconnecting and Packaging Electronic Circuits The Paste equation is N kR where N Viscosity cP k Consistency Multiplier R Rotational Speed RPM n Shear Sensitivity Factor The calculated parameters for this model are Shear Sensitivity Factor no units 10 RPM Viscosity cP or mPa s Confidence of Fit 96 V OPTIONS The DV III Options Menu allows the user to execute temperature control commands and special time tests General rheometer settings are
42. d DV HI Programmable Rheometer measures fluid parameters of Shear Stress and Viscosity at given Shear Rates Viscosity is a measure of a fluid s resistance to flow You will find a detailed description of the mathematics of viscosity in the Brookfield publication More Solutions to Sticky Problems a copy of which was included with your DV III The DV III Rheometer operates with the same precision and ease as the previous DV III Rheometer The same consistent Brookfield methodology of measurement persists along with enhanced programmability keypad menu of options and computer interface software The principle of operation of the DV III 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 measuring range of a DV III7 in centipoise 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 milli Newton m LVDV III 673 7 0 0673 RVDV III 7 187 0 0 7187 HADV III 14 374 0 1 4374 HBDV III7 57 496 0 5 7496 The higher the torque calibration the higher the measurement range The measurement range for each torque calibration may be found in Ap
43. e cP Maximum 6 000 000 40 000 000 80 000 000 320 000 000 Viscometer Minimum LVDV III RVDV III HADV III HBDV III Small Sample Adapter Shear Rate Viscosity cP LVDV IIl cP RVDV IIl cP HADV III cP HBDV IIl cP 500 0 12 500 000 5 000 000 12 800 000 1 000 0 25 000 000 400 0 10 000 000 1 024 0 25 600 000 4 000 100 000 000 1 600 40 000 000 4 100 102 400 000 25 6 640 000 40 0 1 000 000 4 100 0 102 400 000 200 0 5 000 000 400 0 10 000 000 800 0 20 000 000 256 0 6 400 000 512 0 12 800 000 200 0 5 000 000 30 0 10 000 100 0 50 000 oT 200 000 2 500 000 5 000 000 10 000 000 3 200 000 6 400 000 16 400 409 600 000 800 20 000 000 1 600 40 000 000 3 200 80 000 000 1 024 25 600 000 2 048 51 200 000 20 000 000 Shear Viscosity cP Rate sec 1 LVDV IIl cP RVDV III cP HADV IIl cP 640 000 1 000 000 5 000 000 10 000 000 20 000 000 6 400 000 12 800 000 10 000 HBDV IIl cP 103 2 560 000 160 4 000 000 800 20 000 000 1 600 40 000 000 3 200 80 000 000 1 024 25 600 000 2 048 51 200 000 120 10 000 10 000 000 3 200 000 6 400 000 10 000 UL Adapter Viscosity cP LVDV III RVDV III HADV III HBDV III Shear Rate UL Spindle sec 1 YULA 15 or 15Z 0 122 4 1 0 2 000 3 2 2 000 6 4 2 000 25 6 2 000 LV DV III Minimum viscosity 1 0 cP at GORPM 10 of full scale range
44. e is inversely proportional to the rotational speed In other words to measure high viscosity choose a small spindle and or a slow speed If the chosen spindle speed results in a reading above 100 then reduce the speed or choose a smaller spindle Experimentation may reveal that several spindle speed combinations will produce satisfactory results between 10 100 When this circumstance occurs any of the spindles may be selected Non Newtonian fluid behavior can result in the measured viscosity changing if the spindle and or speed is changed See our publication More Solutions to Sticky Problems for more detail When viscosity data must be compared be sure to use the same spindle speed container and temperature Ill 4 Multiple Data Points The majority of viscosity measurements are made at the quality control level and 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 DV III can be used for single point measurement Many fluids exhibit a characteristic change in viscosity 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 This behavior cannot be detected or evaluated with the single viscosity point measurement Non Newtonian flow is analyzed through the collection of viscosity data ove
45. eering Laboratories Inc Manual No M 98 211 A1199 The program is initiated by pressing the PROG RUN key See Using Pre programmed Speeds SPEED SETS WITH ZERO STEP TIMES These programs when executed will require that the user press the ENTER key to progress from step to step On pressing the 3 key in Figure 22 the user is presented with the same screen that he saw in the above description for finite step programs poA MEM SPEED STEP 8l STEP RPM STEP TIME Figure 27 The user inputs his step RPM exactly as he did for finite step time programs above However for time input 00 00 and press the ENTER key From this point forward the user will only be able to enter speeds since each press of the ENTER key will advance him to the next step The OPTION TAB key will not be required If the user wishes to correct the speed input continue to press the numeric decimal point keys until satisfied To correcta speed after pressing the ENTER key for that step wait until the program is complete and then edit the program to correct the mistake To end a program simply enter and accept a step RPM of zero 0 or continue to input step data until the program reaches the twenty five 25 step program limit Speed restrictions limits are the same as for the description just above as are the error messages EDITING A SPEED SET PROGRAM This item is used to review a just entered program or to review modify edit a program already
46. ends that you allow 10 minutes for the instrument to warm up After pressing the MOTOR ON OFF key the screen flashes for approximately 15 seconds while the DV III autozeros After 15 seconds the display reads AUTOZERO IS COMPLETE REPLACE SPINDLE AND PRESS ANY KEY Press a key The main screen is displayed and the DV III is ready for use Figure 6 SFIHDLE 31 F Figure 6 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Il 2 Rheometer Display The DV III Rheometer is supplied with a 4 line display The basic set of information is called The Default Screen and is shown in FIGURE 7 The parameters are detailed below CESICRBGEME S CR EAEIL E TEMP 72 1 F PRTH EN Figure 7 1 Motor Status and Current Rheometer Speed The DV III motor can be OFF ON at 0 0 rpm or ON at a speed greater than 0 0 rpm When the motor is OFF OFF will be displayed and no speed entry will be accepted When the motor is ON the actual speed of rotation will be displayed When the motor is switched from ON to OFF the speed of rotation will be remembered when the motor is turned ON again the DV III will operate at that same speed The rheometer motor is set to OFF after AUTOZERO Note Motor OFF and a speed setting of 0 0 are essentially the same 2 Spindle Number The currently selected spindle Viscosity shear rate and shear stress values will be calculated based on this number See Section II
47. er is greater before readings are taken The viscosity reading should equal the cP value on the viscosity fluid standard to within the combined accuracies of the viscometer and the standard as discussed in the section entitled Interpretation of Calibration Test Results Calibration Procedure for Cone Plate Viscometers 1 2 3 Follow the above procedures for mechanically adjusting the setting of the cone spindle to the plate Refer to Appendix A Table Al and determine the correct sample volume required for the selected spindle 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 Consult with Brookfield or an authorized dealer to determine which fluid is appropriate It is best to use a viscosity standard fluid that will be close to the maximum viscosity for a given cone spindle speed combination Example LVDV III Viscometer Cone CP 42 Fluid 10 Having a viscosity of 9 7 cP at 25 C At60 RPM the full scale viscosity range is 10 0 cP Thus the Rheometer reading should be 97 torque and 9 7 cP viscosity 0 197 cP 0 1 cP for the rheometer plus 0 97 cP for the fluid The accuracy 1s a combination of Rheometer and fluid tolerance refer to Interpretation of Calibra tion Test Results Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 4 With the viscometer stopped remove the sample
48. f the user presses the PROG RUN key with no speed set selected the following error box will be displayed Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 a O E ERROR SET HAS MOT CTED SS ANY KEV AOS Figure 33 However we will assume at this point that we have selected speed set 2 for use in the ensuing data gathering operations To initiate the use of this speed set with finite step times or with zero step times the user presses the PROG RUN key and is presented with a start end step input screen as shown next foL 1 SPEED SET 2 TOTAL STEPS 13 START STEP B ENO STEP 1 iL Figure 34 If the user had not previously entered start and end steps this screen will display 01 for the start step and the last program step 13 in this case as the end step The user could elect to use the entire speed set at this point by pressing the PROG RUN key If the user had previously selected a start and end step those values would be displayed upon entry to this screen instead of the program limit values as shown above However while a speed set can contain up to 25 separate speeds the user may be in a situation where only a few contiguous steps may be required Therefore this screen allows for the option of entering the range of speeds encompassed by the start step not necessarily the first step and the end step not necessarily the last step Pressing any numeric key at this point will er
49. g with several external devices to enhance operation The cables and connections required for proper communication are detailed below RHEOLOADER SOFTWARE DVP 80 cable is used to connect the RS232 serial port on the DV III base to Com Port 1 or Com Port 2 on the computer This cable is supplied with the DV III RHEOCALC SOFTWARE DVP 80 cable is used to connect the RS232 serial port on the DV III base to Com Port 1 or Com Port 2 on the computer This cable is supplied with the RHEOCALC software PARALLEL PRINTER CAP 86 cable is used to connect the 25 pin parallel port on the DV III base with the Centronics port on the printer This cable is supplied with a Brookfield printer SERIAL PRINTER DVP 81 cable is used to connect the 9 pin serial port on the DV III with the 25 pin serial port on the printer This cable is supplied with a Brookfield printer THERMOSEL CONTROLLER MODEL HT 106 TC 200 TC 500 CONTROLLER MODEL HT 107 DVP 141 cable is used to connect the serial port on the DV III base to the serial port on the controller This cable is supplied with the controller Be sure that the controller temperature probe is properly located in the control device Thermosel or bath and connected to the controller Notes 1 The controller may alternately communicate with Rheocalc V 2 0 soft ware In this configuration the controller is connected to the computer through either Com Port 1 or Com Port 2 The DV III
50. 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 tothe 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 1 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 1 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 RV Guardleg LV Guardleg spindles were developed with the above boundary conditions The spindle factors are used to convert the instrument torque expressed as the dial re
51. he viscosity fluid standard to within the combined accuracies of the Rheometer and the standard as discussed in the section entitled Interpretation of Calibration Test Results Calibration Procedure for a Small Sample Adapter When a Small Sample Adapter is used the water jacket is connected to the water bath and the water is stabilized at the proper temperature 1 Put the proper amount of viscosity standard fluid into the sample chamber The amount varies with each spindle chamber combination Refer to the Small Sample Adapter instruction manual 2 Place the sample chamber into the water jacket Brookfield Engineering Laboratories Inc Page 68 Manual No M 98 211 A1199 3 Put the spindle into the test fluid and attach the extension link coupling nut and free hanging spindle or directly attach the solid shaft spindle to the DV III 4 Allow 30 minutes for the viscosity standard sample chamber and spindle to reach test temperature 5 Measure the viscosity and record the Rheometer reading Note The spindle must rotate at least five 5 times before a viscosity reading is taken Calibration Procedure for a Thermosel System When a Thermosel System is used the controller stabilizes the Thermo Container at the test temperature A two step process is recommended for the Thermosel A Evaluate the calibration of the Viscometer alone according to the procedure outlined in Appendix E Calibration Procedure for LV 1 4 and RV
52. id Double clicking on a line in this list box also inserts the command into the grid Wait for time interval Wait for temperature Wait for a keypress The icons to the left of the command descriptions indicate Set viscometer speed the type of command Set spindle A command to wait for a condition Reset data timer Set print interval A command to set a program parameter Print data point now A command to send information to an attached Print text now e printer Before downloading a program to the Rheom eter ensure the following have been checked e The appropriate cable BEL Part No DVP 80 is connected between the selected COM port of the PC and the Rheometer e The DV III is at the download screen OPTIONS DOWNLOAD A PROGRAM LOAD TO SLOT x where x is slot 1 2 3 or 4 e With the LOAD TO SLOT x screen displayed choose a store slot using the DV IIL arrow keys then press the ENTER AUTORANGE key on the Rheometer If after five seconds the Rheometer cannot communicate with the RheoLoader program the B E V I S ERROR NO PC ATTACHED message is displayed If a connection is established the Download button on the PC software becomes enabled and the DV III screen displays DOWNLOADING Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 B E V I S PROGRAM TO SLOT 1 Click on this button to download the displayed pro gram to the DV III When the download is complete the DV III display
53. ight yellow is illuminated turn the micrometer adjustment ring clock wise as you look down on the instrument until the light is no longer illuminated see Figure A4 Moves Away Moves Towards from Hit Point Hit Point clockwise counter clockwise 3 If the yellow contact light is not illuminated slowly turn the micrometer adjustment ring in small increments one or two scale divi sions counter clockwise Continue moving the micrometer adjustment Figure 25 ring slowly counter clockwise until the contact light yellow first turns on THIS IS THE HIT POINT 4 Adjust the sliding reference marker right or left to the closest full scale division mark see Figure A5 5 Turn the micrometer adjustment ring one scale division to the left to meet the line on the sliding reference marker THE YEL Sliding Reference LOW CONTACT LIGHT SHOULD GO oe 6 You have established the gap space needed E lt gt a for measurement Now turn the toggle Division Marks switch OFF left the red pilot light should Figure A6 go off 7 Carefully remove the sample cup Notes The cup may be removed and replaced without resetting the gap if the micrometer adjustment ring has not been moved Remove the spindle from the viscometer when cleaning Re establish the hit point every time the spindle is attached detached Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 A 4 VERIFYING
54. interval mode is reflected in the message being displayed on line three of the display where PROG has replaced ENTER indicating that the program will be executed step by step without user intervention Here the user is again informed that he is at speed 02 of the 12 speeds comprising speed set 02 As the programmed time interval elapses the following will occur The DV III will ramp up or down to programmed speed 03 and The data corresponding to the last speed speed 02 that existed at the moment the step time elapsed will be sent to the printer since the printer is ON PRTN The automatic ramping to the next speed will be interpreted by the DV III as if the ENTER key had been pressed causing the printer output Atthe completion of the speed set the viscometer speed will be set at ZERO RPM After the last speed has been executed the viscometer speed will be set at ZERO RPM and the following message will be displayed Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 aM PROGRAM COMPLETE PRESS EITHER ENTER OF PROGRAM RUM Figure 43 Pressing the ENTER key would return the user to the default screen as depicted in its general form in Figure 42 or to the program start and stop limit selections of Figure 34 if the PROG RUN key is pressed 6 OPERATION WITH PROGRAMMED SUBSET SPEEDS Had the user selected a subset of a speed set Figure 34 say speeds 04 through 08 then the programmed
55. is reached reached spindle Set print interval begin printing data at 1 second intervals Wait for torque wait for spindle to completely unwind to 0 torque Program 5 Variable speed Command Command Description Parameter Comments run at 50 RPM PDN Print data point now print one data point run at 10 RPM wait for 10 seconds PDN Printdatapointnow _ print one data point run at 20 RPM ee es data point now print one data point run at 50 RPM m ero s 00 10 wait for 10 seconds PDN Printdatapointnow _ print one data point Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 APPENDIX A Cone Plate Rheometer Set Up This Cone Plate version of the DV III 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 Programmable DV III4 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 Brookfield prior to shipment The following information explains how to set the Electronic Gap and verify calibration of the DV I V
56. is step until the current temperature equals the C specified value WKY 16 character or less The specified message is displayed on the top line of the DV III display text message while PRESS A KEY is displayed on the bottom line of the DV IIl The program waits at this step until a viscometer key is pressed While waiting at this step the viscometer produces a beep every few seconds to remind the operator that a keypress is required to continue If a print interval was enabled see SPI at the time this command is executed the data print timer continues to count up If the print interval elapses and a key has not yet been pressed a line of data displaying the time since the last data print is printed as soon as a key is pressed SSN Speed value The DV III begins rotating at the specified speed This can be any of RPM the speeds listed in the Speed list of the DVLoader software These speeds are the same as those listed in the Custom Speeds list in the viscometer s Options menu SPI Time The DV III begins printing data to the selected printer serial or parallel MM SS as selected in the DV III menus at the rate specified MM SS is minutes seconds SSP Two digit spindle code 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 III STM Temperature value Set and control to the specified temperature if
57. iscometer A 1 ELECTRONIC GAP SETTING FEATURES TOGGLE SWITCH allows you to enable disable the Electronic Gap Setting Feature left position is OFF disabled right position is ON en abled PILOT LIGHT is the red LED light when illuminated it means the Electronic Setting Function is sensing enabled Pilot Light red Toggle Swtich CONTACT LIGHT is the yellow LED light bk one a A a ontact Li when it first turns on the hit point has been yellow bial found liding Reference Micrometer SLIDING REFERENCE MARKER is used after Adjustment Ring finding the hit point it is the reference for establishing the 0 0005 inch gap Figure A1 MICROMETER ADJUSTMENT RING is used to move the cup up or down in relation to the cone spindle Turning the ring left clockwise lowers the cup turning it right counterclockwise raises the cup Each line on the ring represents one scale division and is equivalent to 0 0005 inch movement of the plate relative to the cone Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 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 2 Figure Al 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 ba
58. l overwrite the default values Press the OPTION TAB key to move the cursor to the MOTOR OFF 6 field Enter the MOTOR OFF torque value The new entry will overwrite the default value Press the ENTER key to accept the ALARM values Press the NUMBER 3 key to enable turn on disable turn off the alarms Press ENTER to accept the ALARM condition Note The LO ALARM is tripped after the 96 torque reading falls below the setting The beeping may be shut off by either the torque reading rising above the alarm setting or by pressing the ESCAPE key The HI ALARM is tripped after the torque reading goes above the alarm setting The beeping may be shut off by either the torque reading falling below the larm setting or by pressing the ESCAPE key The MOTOR OFF is tripped after the torque reading goes above the motor off setting The DV III stops rotating and the instrument beeps Pressing any key turns off the beep Brookfield Engineering Laboratories Inc Page 42 Manual No M 98 211 A1199 V 4 Set Temperature The DV III can issue temperature control commands when an external temperature control device has been connected see Section V 1 Selecting item 4 Set Temp in the Options menu will display the current setpoint Enter the new setpoint by using the number keys and accept with the ENTER key The temperature controller will begin using the new setpoint immediately upon the press of the ENTER key Note The sig
59. lated with the RV Guardleg in use RV 36 500 36 500 121 300 12 200 36 500 1 250 000 500 000 1 280 000 32 000 50 000 5 120 000 250 000 500 000 1 000 000 320 000 640 000 250 000 3 210 12 280 6 400 51 200 98 300 HA 73 000 73 000 242 600 24 400 73 000 2 500 000 1 000 000 2 560 000 64 000 100 000 10 240 000 500 000 1 000 000 2 000 000 640 000 1 280 000 500 000 6 540 24 560 12 800 102 400 196 600 HB 292 000 292 000 970 400 97 600 292 000 10 000 000 4 000 000 10 240 000 256 000 400 000 40 960 000 2 000 000 4 000 000 8 000 000 2 560 000 5 120 000 2 000 000 26 160 98 240 51 200 409 600 786 400 LV spindle ranges are calculated with the LV Guardleg in use Determine the full scale viscosity range of the LV3 spindle running on an RV series Rheometer at 45 RPM Spindle Speed 45 RPM LV Spindle Range Coefficient for RV series Rheometer 1 280 000 Full Scale Viscosity Range 1 280 000 28 444 cP mPaes 45 Determine the full scale viscosity range of the LV3 spindle running on a 2xHA Rheometer at 103 5 RPM Spindle Speed 103 5 RPM LV3 Spindle Range Cooefficient for 2xHA Rheometer 2 x 2 560 000 Full Scale Viscosity Rnage 5 120 000 49 468 cP mPaes 103 5 The maximum viscosity taht should be taken from the DV III Rheometer is at 100 of any full scale spindle speed range Manual No M 98 211 A1199 LV 1 4 and RV HA HB 1 7 Rheometers Viscosity Rang
60. ld show zero 0 0 RPM At this point the user may perform any valid viscometer operation load a new speed set run a direct speed set alarms or even re start the current program 6 PROGRAMMED SPEED HOLD The user may interrupt program mode operation at any time by pressing the PROG key during program execution The following message would be displayed PROGRHHM HOLDO CONTINUE PROGRAM 3 STOP PROGRAM AOS Figure 49 The viscometer motor would be automatically turned OFF and the DV III would be awaiting user key input If the user presses the 1 key the DV III will continue executing the current program picking up from whichever RPM and time if applicable it had been interrupted However if the user had pressed the 3 key operation would be identical to that described above for Programmed Speed Stop mode Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 IV 3 Bevis Programs The B E V I S Programming Method allows the operator to control the DV III through the variables of speed temperature and time while providing for independent data collection Programs can include up to 25 commands with a maximum data count of 800 The DV III can store up to 10 programs Upon completion of the program the data may be viewed on the DV III display analyzed or printed to an attached parallel or serial printer B E V LS programs are created on a PC using Rheoloader software supplied with the DV I
61. le A1 Attach the sample cup to the Viscom eter and allow sufficient time for the sample cup and cone to reach tem perature equilibrium Turn the motor on Set the desired speed s Measure the viscosity and record the reading in both torque and centipoise cP Note The cone spindle must rotate at least five 5 times before a visco sity reading is taken 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 designation on the cone spindle indicates use with Electronic Gap Setting Cone Plate Viscometers Rheometers only Manual No M 98 211 A1199 Brookfield Engineering Laboratories Inc APPENDIX B Viscosity Ranges The table below Universal Spindle Ranges lists the Spindle Range Coefficients for all spindles used on DV III Rheometers Dividing the coefficient number by any of the 2 500 Rheometer speeds will give the full scale viscosity range for a Rheometer spindle speed combination Universal Spindle Ranges SPINDLE RANGE COEFFICIENT Entry Cod is sens Rheometer Series LV 937 3 750 9 375 18 750 37 500 93 750 375 000 937 3 750 9 375 18 750 37 500 93 750 375 000 937 3 750 9 375 18 750 37 500 93 750 375 000 6 000 30 000 120 000 600 000 1 200 000 18 750 37 440 93 600 187 200 468 000 936 000 98 400 600 Brookfield Engineering Labo
62. modifications to the recommended method of operation to suit their needs Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 APPENDIX F VS 27Y Clamp Assembly The VS 35Y Clamp assembly holds the DV III on the upright rod and thus supports it on the base The parts are shown in Figure F1 VS 41Y Clamp Screw Assembly Front amp T VS 29 Tension Insert VS 29W Washers VS 28 Tension Screw Figure FI If the clamp is taken off the upright rod the tension insert Part No VS 29 must be properly aligned for the clamp to fit back onto the upright rod When the tension insert Part No VS 29 is inserted its slot must be in the vertical position parallel to the upright rod If the slot is not in the correct position the clamp will not slide down over the upright rod Useasmallscrew driveror pencil to moveitinto the correct position The VS 29W Bellevillespring washers must face each other as illustrated Adjust the VS 28 tension screw so that the clamp assembly is not loose on the upright rod Brookfield Engineering Laboratories Inc Page 74 Manual No M 98 211 A1199 APPENDIX G 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
63. n instruct the DV III to rotate the spindle at 5 RPM for 30 seconds and then change speed to 10 RPM and wait 20 seconds with the following program Step 1 RPM 5 Time 00 30 Step 2 RPM 10 Time 00 20 A single data point will be collected at the end of each time interval The B E V I S programming technique uses a custom program language to control the DV IIL A program consists of a series of commands instructing the rheometer in speed control time control data collection temperature control and output B E V LS offers a higher level of rheometer control compared to the DV III method However the construction of B E V I S programs is more involved The 2 step DV III program previously described is duplicated using B E V I S com mands below SSN 5 WTI 00 30 PDN SSN 10 WTI 00 20 PDN END The involved programming of B E V I S commands is a small trade for the significant increase in control capability over the DV III method Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 IV 2 DV III Speed Time Pair Programming This programming method allows the operator to control the DV III through the variables of speed and time These speed time pairs instruct the rheometer to operate at a speed of rotation for a certain period of time Programs can be created with up to 25 steps The DV III can store up to 10 programs Upon completion of a program the data may be viewed on the DV III display analyzed or pri
64. n of temperature is changed by using the arrow keys when the cursor is under the character This is possible only with temperature bath controllers V 5 Data The Review Data menu allows data review of the most recently completed speed set program Data may be reviewed on the DV III screen on a serial printer or both The procedure for reviewing data after a test is as follows 1 Run a DV III or B E V IS program 2 Press the OPTION TAB key 3 Press the NUMBER 5 key to display the Review Data screen REVIEW DATA SCREEN ONLY SCREEN amp PRINT PRINTER ONLY Figure 62 4 Select one of the review modes press NUMBER 1 for DV III screen only NUMBER 2 for DV III7 screen and printer or NUMBER 3 for printer only Note that you should select options 2 and 3 only if the printer is connected and on line 5 If NUMBER 1 or NUMBER 2 were pressed data from the first step is either displayed on the screen or displayed and printed Press the ENTER key to scroll through and display print the remaining step data cP 10800 STEPO1 50 2 TIME 00 00 SS 0 TEMP 70 2 SR 0 RPM 100 0 Figure 63 6 If the NUMBER 3 key printer only is selected the DV III prompts to READY PRINTER PRESS ANY KEY or PRINTER IS NOT READY TURN ON PRESS ONLINE A sample of printed output is shown in Figure 64 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Sample Name Opera
65. n the appropriate com mand in the list box to the right Before being permitted to insert another command the param eter for the previous command in the grid must be entered if one is required This parameter is entered into the last column of the grid Select the COM RS 232 port the Programmable DV III Rheometer is connected to from the COM Port drop down list Click the Open File button to load existing B E V LS programs Click the Save File button to save the B E V I S program displayed in the grid Click the Print button to print the B E V I S program displayed in the grid Click the Insert button to insert the B E V I S command selected in the Commands E4 box into the selected row in the program grid Brookfield Engineering Laboratories Inc Page 48 Manual No M 98 211 A1199 Click the Delete button to delete the command in the selected row of the program grid Click the Up button to move the command in the selected row of the program grid up 4 one row Up Click the Down button to move the command in the selected row of the program grid down one row Down Click the Clear button to clear the grid of all commands Once cleared the com T mands cannot be retrieved Clear This list box displayed the commands available for creating programs As previously stated clicking on the Insert button inserts the highlighted command WTI in this case Wait for torque into the selected line in the program gr
66. nted to an attached parallel or serial printer Two examples of programs are shown below Collect Data Over Time Collect Data At Several Speeds Step RPM Time Step RPM Time 1 100 00 12 1 2 5 01 00 2 100 00 12 2 5 00 30 3 100 00 12 3 10 00 30 4 100 00 12 4 20 00 15 5 100 00 12 5 50 00 15 Five viscosity data points Five viscosity data points will be will be collected over collected at five speeds over one minute 150 seconds This program mode is accessed by pressing the program key and selecting number 1 1 DV III The creation editing and execution of DV III programs are described in the following sections There are two types of test programs 1 Next Speed Set where the test speeds are programmed and the operator must signal the DV II to change speeds and therefore take a reading by pressing the ENTER key 2 Prog Speed Set where the DV II will perform the test automatically Each step of a program has two variables speed and hold time The reading is taken at the end of the hold time interval in a Prog Speed Set or when the ENTER key is pressed in a Next Speed Set If the first step hold time interval is 0 seconds the program is a Next Speed Set type If the first step interval is 1 second or more the program is a Prog Speed Set type SPEED SET SELECTION AND PROGRAMMING The DV III viscometer allows for the retention of a maximum of 10 speed sets with up to 25 discrete speeds per speed set The program loca
67. o delete Note If no speed set is in use the word NONE will appear next to the IN USE prompt At this point the user has two options 1 Pressing the MOTOR ON OFF ESCAPE key will exit from this screen and no speed sets will be cleared Or 2 Pressing any of the keys 0 1 2 3 5 8 or 9 will delete that speed set Thus to discard speed set 5 the user would press the 5 key and be presented with DELETE SPEED SET 5 ARE YOU SURE i YES 3 HO AOS Figure 31 In which the DV III is requesting that the user specifically press the 1 key in order to delete the desired speed set CLEAR SPFEE IH MEF CLEAR SET _ fo Figure 32 Pressing the 3 key will cause the DV III to take no action will return the user to the CLEAR SPEED SET opening screen Figure 30 Any attempt to delete an in use speed 3 for instance will cause the DV III to issue a beep beep with no action being taken Thus no active i e selected for use program can be deleted from this screen 6 USING PRE PROGRAMMED SPEEDS Pressing the three 3 key from Figure 21 takes the user to the speed set selection screen of Figure 22 where the user selects a new speed set That done the user is sent to the default screen with SPEED SET X SELECTED displayed on line three 3 of the screen The user initiates the use of programmed speeds by pressing the PROG RUN key I
68. offsetting the measured temperature to agree with an external temperature measurement device The adjustment will be indicated by flashing temperature units F or C on the default screen Figure 7 The adjustment will be resetto 0 0 when the DV III is turned on The adjustment is entered using the number keys The sign or is selected using the OPTION TAB key The change must be confirmed by pressing the ENTER key V 2 Print 1 Change the time interval that is used when the DV III is printing continuously Data is entered in the format of MM SS For example an interval of one minute and 30 seconds is entered as 01 30 The change is initiated by pressing the 1 key Once the time interval is input it must be accepted by pressing the ENTER key 2 Change the port to be used for printing parallel or serial The change is selected by first pressing the 2 key and then the appropriate key for the printing method The change will be indicated by the position of the arrow on the right side of the display The change is accepted by pressing the ENTER key When selecting serial printing the DV III will also ask for handshaking status Please see the instruction manual of the printer for specification If the DV III is communicating with an external temperature controller serial printing will not be available the controller uses the serial port 3 Enter the date and time to be shown on printed data tables Data is entered in the f
69. ogram by pressing the PROGRAM RUN key which signifies that the user is satisfied with his start and stop step values and wishes to start running with the selected speed set Or he can return to the default screen of Figure 7 by pressing the MOTOR ON OFF ESCAPE key Note the OPTIONS TAB key is re enabled at this point only to allow the user to return to the LOCKOUT OPTIONS screen In either case if the userhas enabledthe lockout mode the top line of the default display will change as shown in Figure 37 below E e UN Figure 37 The LOCKOUT condition will remain in effect until the user re starts the program mode by pressing the PROGRAM RUN key re initiating the steps of Figures 34 through 37 above Once the start and end steps have been selected the program is started by pressing the PROG RUN key However if the viscometer motor was not turned on the following message would be displayed ey MOTOR MUST BE TURNED ON PRIOR TO RUNNING PROGRAMMED SPEEDS AOS Figure 38 At this point the user would turn the viscometer motor on by pressing the MOTOR ON OFF ESCAPE key This will cause the viscometer to start running at the first selected program speed Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 6 USING PROGRAMMED SPEEDS WITH A ZERO TIME INTERVAL Assume the following A speed set has been selected A subset of the speed set has not been selected 1 e we will use the entire set of speeds
70. ogram will use the previously blank line 3 on the default display screen to record the new spindle input as depicted in Figure 11 SPINOLE 31 3 m MN Figure 11 Toenter a spindle number press the numeric keys until the desired spindle number has been entered Valid spindle numbers encompass the range from 00 to 99 as listed in Appendix D Mistakes are corrected by repeatedly pressing the numeric keys until the proper spindle value has been entered At that point the user presses the SELECT SPDL key again An invalid spindle entry will result in a beep and the display of the data entry error screen as depicted below j IMURLID DATA ENTRY BEAD SPINDLER RE ENTER Figure 12 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 An invalid spindle entry is any two digit number in the range from 01 to 99 which is not listed in Appendix D This error message will be displayed for a few seconds after which the spindle entry screen Figure 11 will be re displayed with a blank field for the spindle number The user can cancel spindle entry at any time by pressing the MOTOR ON OFF ESCAPE key The user may elect to use a special spindle whose selection is accomplished by first entering a spindle number of 99 and then pressing the SELECT SPDL key This will result in the following display PECIAL SPINDLES 4 AD RE E Di Pi Figure 13 At this point press the nume
71. on V 2 V 6 TIMED DATA COLLECTION The DV III offers three methods of time control that may be used independently of control programs These techniques result in a single data point collected at the end of the test If multiple points are required the rheometer should be connected to a printer and set up with an appropriate print interval TIME TO TORQUE The DV III will record the amount of time required to reach the specified torque value at a single speed Torque and speed are input using the number keys and OPTIONS TAB key The test will begin immediately upon the press of the ENTER key The test will end when the specified torque level is reached in either an upward or downward direction The data will be displayed as shown in Figure 62 The SELECT DISPLAY key can be used to view all measurement parameters The PRINT key can be used to send a single data line to the printer Brookfield Engineering Laboratories Inc Page 44 Manual No M 98 211 A1199 DEMENS RPH FF SPINDLE 31 TEMP 72 1 F FETH TINE TO TORGUE DONE L TORG 89 4 m H3 RISUS Figure 65 Note If continuous printing was used during the test it will be suspended when viewing the test data or entering time to torque parameters TIMED STOP The DV III will operate at a single RPM for a specified period of time Time and speed are entered using the number keys and OPTIONS TAB key The test will begin immediately upon the press of
72. onfidence of Fit 63 6 96 The equation for each model is described below with a definition of parameters Please contact Brookfield or an authorized representative if further information is required Note Theconfidence of fit parameter used in all of the models is an indication of how well the model fits the data set 100 indicates the best fit Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 1 Casson Standard The Standard Casson equation is Vt Vt VID where T Shear Stress To Yield Stress stress at zero shear rate T Plastic Viscosity D Shear Rate The calculated parameters for this model are Plastic Viscosity cP or mPaes Yield Stress Dynes cm2 or N m2 Confidence of Fit 96 The Standard Casson method is a direct implementation of the original Casson equation 2 NCA CMA Casson Chocolate This Casson method is derived from the standard set forth by the National Confectioners Association NCA and the Chocolate Manufacturers Assocation CMA Although basedon the original Casson equation this implementaiton has been tailored by the NCA and CMA specifically to applications involving chocolate The Chocolate Casson equation is 1 a VT Wto 1 a VND where T Shear Stress To Yield Stress stress at zero shear rate n Plastic Viscosity D Shear Rate a spindle or bob radius inner cup radius The calculated parameters for this model are Plastic Vis
73. or on the DV III base see Figure 3 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Rheometer Head RTD Temperature Probe Connector Power ON OFF Switch Ribbon Cable AC Fuse s Connector RS 232 Serial Printer Computer Analog Output s AC Power Connector S Connector Connector Parallel Printer Ribbon Cable Figure 3 5 Connect the RTD probe to the socket on the back side of the DV III Rheometer Figure 3 6 The Rheometer must be leveled before the instrument is zeroed and readings are taken The level is adjusted using the three leveling screws on the base Adjust so that the bubble level on top of the DV III Figure 2 is centered within the circle 7 Make sure that the AC power switch at the rear of the base unit is in the OFF position Connect the AC plug to the socket on the back of the DV III base and plug it into the appropriate AC line The DV III must be earth grounded to ensure against electronic failure 8 Temperature monitoring is assured after the instrument has stabilized to within 1 0 C in the range 100 C to 150 C and within 2 C in the range 150 C to 300 C 9 For Cone Plate models refer to Appendix A 10 For printers software and temperature controllers refer to Section 1 6 Connections Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 1 6 Connections The DV III Rheometer is capable of communicatin
74. ormat of DD MM YY for date and HH MM for time 24 hour clock For example 2 30 pm on January 15 1999 is entered as 15 01 99 14 30 The change is initiated by pressing the 3 key Once the data is input it must be accepted by pressing the ENTER key Brookfield Engineering Laboratories Inc Page 41 Manual No M 98 211 A1199 V 3 Alarms There are three adjustable alarm settings LO ALARM HI ALARM and MOTOR OFF The values are set in the Set Alarms mode Alarms are used to signal the operator that the fluid is out of the input specification The alarms are set in torque values not Viscosity Shear Stress or Shear Rate values The range of values which may be entered for each alarm and their default values are LO ALARM HI ALARM MOTOR OFF Minimum value 10 Minimum value 0 Minimum value 0 Maximum value 99 9 Maximum value 100 Maximum value 115 Default value 10 Default value 99 9 Default value 110 The procedure for entering and enabling alarm values is as follows starting from the main screen 1 2 3 4 5 6 7 8 9 10 11 Press the OPTION TAB key to display the Options Menu Press the NUMBER 3 key to display the Alarms Options screen Press the NUMBER 1 key to View Set Alarms Enter the LO ALARM torque value The new entry will overwrite the default values Press the OPTION TAB key to move the cursor to the HI ALARM 6 field Enter the HI ALARM 6 torque value The new entry wil
75. pack in place in the shipping case If available use the original foam insert or roll up one sheet of tissue paper or similar and place between the spindle coupling and cup assembly see Figure K2 This will help prevent damage in shipping Brookfield Engineering Laboratories Inc Page 76 Manual No M 98 211 A1199 Providing us with the following information will help us to service your equipment more quickly and efficiently Please photocopy fill out and return a copy of this form with your instrument Brookfield recommends that all viscometers be returned for annual calibration to ensure that your equipment continues to provide the same accuracy you have come to expect from Brookfield products VISCOMETER INFORMATION Serial Number COMPANY INFORMATION Company Primary User Telephone Fax P O Number to cover repair and shipping Billing Address Shipping Address Return Shipment Instructions UPS ground J UPS Next Day J UPS2nd Day J Federal Express J Federal Express Account Number required SERVICE INFORMATION Operating Conditions Spindle Speed Viscosity Range Temp Control Temperature of Sample Did you contacting Brookfield before returning this instrument YI N If yes whom did you contact Description Symptoms of Present Problem Malfunction please list all Time Since Last Serviced if known Before amp After Calibration Che
76. pendix B All units of measurement are displayed according to either the CGS system or the SI system 1 Viscosity appears in units of centipoise shown as cP or milliPascal seconds shown as mPaes on the DV III Rheometer display Shear Stress appears in units of dynes square centimeter D cm or Newtons square meter N m Shear Rate appears in units of reciprocal seconds 1 SEC Torque appears in units of dyne centimeters or Newton meters shown as percent in both cases on the DV III Rheometer display The equivalent units of measurement in the SI system are calculated using the following conver sions SI CGS Viscosity 1 mPaes TIGP Shear Stress 1 Newton m2 l0dyne cm Torque 1 Newton m 107 dyne cm References to viscosity throughout this manual are done in CGS units Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 1 1 Components Component Part Number DV III Rheometer depends on model Powerbase DVP 2Y includes Leveling Screws 3 VS 3 Upright Rod VS 20 Jam Nut VS 21 Clamp Assembly VS 27Y Spindle Set with Case LVDV III set of four spindles or SSL RVDV III set of seven spindles or SSR HA HBDV III set of seven spindles SSH For Cone Plate versions a spindle wrench one cone spindle and sample cup Part No CPE 44Y replace the spindle set Power Cord for 115 VAC DVP 65 for 230 VAC DVP 66 RTD Temperature Probe DVP 94Y Ribbon Cable DVP
77. pty and are available for download from a host computer A press of the ENTER key would select the current program i e 3 for use while a press of an appropriate numeric key 0 1 2 3 and 4 would select that specific Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 program slot for use The above screen would be updated to reflect the new selection A press of the 5 6 7 8 or 9 keys will place the user in the B E V I S program download mode The following screen appears assuming a press of the 5 key DOWNLOAD A PROGRAM LOAD POM TO SLOT 3 PRESS ENTER TO START fo Figure 52 The user s selection 5 is flashing and is the current slot selection When ready the user presses the ENTER key to begin the program download The following screen will appear for the duration of the download See Section VI RHEOLOADER for information on creating and downloading B E V LS programs lt DOWNLOAD A PROGRAM DOWNLOADING BEVIS PROGRAM TO SLOT 2 AOS Figure 53 RUNNING B E V I S PROGRAMS Programs are run by pressing the 2 key when in Figure 50 which presents the user with the following screen B E W 1 5 PROGRAMS RUM PROGRAM 3 PRESS ENTER TO START AOS Figure 54 Here we see that our program is no 3 and that a press of the ENTER key will start it running As soon as the program starts executing the user will be presented with Figure 55 This is a typical display for
78. r 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 formulating and production of the product The DV III is capable of collecting multiple data points for the analysis of flow behavior See Section IV on Programming and Analysis More information on flow behavior shear rate and rheograms is available in our publication More Solutions to Sticky Problems Brookfield Engineering Laboratories Inc Page 20 Manual No M 98 211 A1199 IV PROGRAMMING THE DV III AND ANALYSIS The programming and data analysis functions of the DV III are accessed by pressing the PROG key on the rheometer The display will change to present a menu with three choices DV HI B E V I S and Models DV III and B E V L S are the programming alternatives Models will present the five math models available for data analysis NN Figure 20 IV 1 Programming Concept The DV III may be programmed to collect viscosity data without operator involvement The captured data may be displayed and analyzed or output to a printer Programs may be written using two different methodologies DV III and B E V I S The DV III programming technique uses speed time pairs to control the DV III A program consists of multiple lines up to 25 instructing the rheometer to operate ata particular speed for some period of time As an example we ca
79. r shaft with white nylon shipping cap as shown in Figure K1 or with white plastic shipping cap originally supplied with instrument J Pack the instrument in its original case Cases are available for immediate shipment from Brookfield If the case is not available take care to wrap the instrument with enough material to support it Avoid using foam peanuts or shredded paper J DO NOT send the laboratory stand unless there is a problem with the upright rod clamp or base If there is a problem with the stand remove the upright rod from the base and individually wrap each item to avoid contact with the instrument Do not put lab stand in viscometer carrying case Foam Insert CONE I Fill out acopy of the Viscometer Information Sheet or Tissue Paper PLATE on the reverse side with as much information as possible to help expedite your service If you do the type of problem you are experiencing or the service you need performed Please also include a purchase order number for us to bill against PEEEE TIAN not use this form please include a memo indicating J Package the instrument and related items in a strong EE box for shipping Mark the outside of the box with handling instructions Example Handle with Care or Fragile Delicate Instrument For cone plate instruments please remove the cone spindle and carefully
80. rated considering the specified container Alternate containers will provide results that are repeatable but not accurate The LV 1 4 and RV 1 7 are designed to be used with the guardleg attached Measurements made without the guardleg will provide repeatable results but may not provide accurate results When comparing data with others be sure to specify the sample container and presence absence of the guardleg Many samples must be controlled to a specific temperature for viscosity measurement When conditioning a sample for temperature be sure to temperature control the container and spindle as well as the sample Please see our publication More Solutions to Sticky Problems for more detail relating to sample preparation Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Ill 3 Selecting a Spindle Speed The DV III has the capability of measuring viscosity over an extremely wide range for example the RVDV III can measure fluids within the range of 100 40 000 000 cP see Appendix B This range is achieved through the use of several spindles over many speeds The process of selecting a spindle and speed for an unknown fluid is normally trial and error An appropriate selection will result in measurements made between 10 100 on the instrument torque scale Two general rules will help in the trial and error process 1 Viscosity range is inversely proportional to the size of the spindle 2 Viscosity rang
81. ratories Inc RV 10 000 40 000 100 000 200 000 400 000 1 000 000 4 000 000 10 000 40 000 100 000 200 000 400 000 1 000 000 4 000 000 10 000 40 000 100 000 200 000 400 000 1 000 000 4 000 000 64 000 320 000 1 280 000 6 400 000 12 800 000 200 000 400 000 1 000 000 2 000 000 5 000 000 10 000 000 1 050 000 6 400 HA 20 000 80 000 200 000 400 000 800 000 2 000 000 8 000 000 20 000 80 000 200 000 400 000 800 000 2 000 000 8 000 000 20 000 80 000 200 000 400 000 800 000 2 000 000 8 000 000 128 000 640 000 2 560 000 12 800 000 25 600 000 400 000 800 000 2 000 000 4 000 000 10 000 000 20 000 000 2 100 000 12 800 Manual No M 98 211 A1199 HB 80 000 320 000 800 000 1 600 000 3 200 000 8 000 000 32 000 000 80 000 320 000 800 000 1 600 000 3 200 000 8 000 000 32 000 000 80 000 320 000 800 000 1 600 000 3 200 000 8 000 000 32 000 000 512 000 2 560 000 10 240 000 51 200 000 102 400 000 1 600 000 3 200 000 8 000 000 16 000 000 40 000 000 80 000 000 8 400 000 51 200 Universal Spindle Ranges Example 1 Example 2 Note Brookfield Engineering Laboratories Inc SPINDLE RANGE COEFFICIENT E 2 ntry Code Rheometer Series LV 3 420 3 420 11 340 1 144 3 420 117 200 46 880 120 000 3 000 4 688 480 000 23 4000 46 8880 93 750 30 000 60 000 23 4000 307 T TST 600 4 800 9 216 RV spindle ranges are calcu
82. re 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 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 accurate and repeatable torque reading under any measurement circumstance However the conversion of this torque reading to centipoise will only be correct if the factor used was developed for those specific conditions Brookfield has outlined a method for recalibrating a Brookfield Viscometer Rheometer to any measurement circumstance in More Solutions to Sticky Problems Section 3 3 10 It is important to note that for many viscometer users the true viscosity is not as important as a repeatable day to day value This repeatable value can be obtained without any special effort for any measurement circumstance But it 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 With this knowledge the viscometer user may make
83. ric key for the special spindle of choice This list is created at the time the Rheometer is manufactured This list will therefore depend on the number of special spindles ordered and could contain as few as one 1 or as many as five 5 spindles If no special spindles were purchased the following message will be displayed if 99 is entered for a spindle number M TNWALIO DATA ENTRY BNC SPECIAL SPIHDLER RE ENTER AOS Figure 14 Press any key to exit this screen and to return to the spindle selection screen The user may again select another spindle or press the SELECT SPDL key to cancel spindle selection operation Successful selection of a spindle at the press of the SELECT SPDL key returns the user to the default screen with the new spindle displayed in the upper right hand corner For standard spindles this would be the two 2 digit designator used to select the spindle In the case of special spindles the two 2 letters AA AB AC AD or AE corresponding to the special spindle would be displayed instead The spindle number or letters will be retained in memory when power is removed This means that the last value entered for the spindle will be displayed the next time the Rheometer is turned on 11 4 Direct Speed Entry At this point the user may choose to enter a speed by the so called direct speed entry method Enter a valid speed in the range of 0 01 to 250 RPM by pressing the numeric keys successively The previously
84. s DOWNLOAD DONE TO EXIT PRESS A KEY At this point the program in the DV III can be printed and or run from the Rheometer Click on this button to exit the RheoLoader software VI 2 Example Programs The following example programs can also be found on the RheoLoader disk that was included with the DV III2 Rheometer Program 1 X Pre shear PLN SSN WPT Wait for torque 90 0 wait unitl 90 torque is reached PLN SPI Set print interval 00 10 begin printing data at 10 second intervals a Wait for time interval 01 40 wait at this step for 1 minute and 40 seconds effectively printing 10 data lines Program 2 For use with an external temperature controller E Command Description Parameter Comments Set temperature 40 0 Set control value to 40 C Wait for temperature wait until temperature 40 C as an example a Thermosel Controller can be used for temperature control 05 00 soak time allow temperature to settle run at 25 RPM intervals effectively printing 12 data lines Program 3 Wait for cure Command Command Description Parameter Comments Set spindle set to a number 31 spindle 100 0 run at 100 RPM intervals WPT Wait for torque 85 0 wait until torque 85 a curing cycle Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Program 4 Spring relax Command Command Description Comments WKY tell operator to wind spindle until 10046 torque
85. t requirements 6 SINGLE SPEED Single speed measurements may be made by direct speed commands on the DV III keypad Viscosity and Torque are read directly from the display This technique offers the simplicity of the Brookfield Dial Viscometer Multiple data points may be gathered by issuing multiple speed commands This technique is fast and easy It s well suited to gathering data on samples prior to establish ing a test method or for performing single point tests DV IlI SPEED TIME PAIRS DV III speed time pairs offers a simple technique to collect multiple data points Programs can be created and executed from the DV III keypad Results can be analyzed or output to a printer This technique is useful when multiple data points are required and the test method is simple B E V I S PROGRAMS B E V I S Programs offer a command set capable of sophisticated rheometer control and data collection Programs are created on a PC and executed from the DV III keypad Results can be analyzed or output to a printer The B E V I S Program technique is useful when sophisticated data collection is necessary Brookfield Engineering Laboratories Inc Page 36 Manual No M 98 211 A1199 IV 5 Data Analysis Data collected from DV III speed time pairs or B E V I S programs may be analyzed using several math models These models provide a means to numerically describe the behavior of the test fluid In the case of viscosity measurement a
86. ter Name Date 06 21 91 Time 10 06 Model 2R Spindle 31 01 RPM 30 0 18 2 cP 970 D CM2 100 I SEC 10 2 T 22 1C TIME 00 05 02 RPM 40 0 24 3 cP 972 D CM2 132 I SEC 13 6 T 22 C TIME 00 05 03 RPM 50 0 30 3 cP 969 D CM2 164 I SEC 17 0 T 22 1C TIME 00 05 04 RPM 60 0 36 3 cP 967 D CM2 197 1 SEC 20 4 T 22 1C TIME 00 05 05 RPM 70 0 42 3 cP 966 D CM2 230 1 SEC 23 8 T 22 C TIME 00 05 oo oo oO oO OO cQ m7 o o o o o o o o o o Figure 64 Review data notes 1 The DV III stores data from the most recent speed set program test When a subsequent speed set program is run any test data in memory will be overwritten and the previous data will be lost 2 Ifthe Printer Only option is selected the date time of day model and spindle number are printed with the test results The DV III does not store time and date when itis turned off therefore the time and date must be entered when printing the first time after start up See Section V 2 3 TheDV III4 may be set up to handshake using XOn X Off protocol or not handshake when connected to a serial printer If you opt to use the handshake mode your printer is on line all cable connections are correct and your printer is set for handshake mode then data should appear on your printer immediately If it does not appear and instead you see the message PRINTER IS NOT READY TURN ON PRESS ONLINE then you should turn the handshake option off See Secti
87. test Printing the averaged data must be done with the PRINT key at the end of the test Brookfield Engineering Laboratories Inc Page 46 Manual No M 98 211 A1199 VI Rheoloader User s Manual B E V LS Brookfield Engineering Rheometer Instruction Set is a scripting language developed at Brookfield Engineering Laboratories that allows for the creation of flexible programs to control our line of Rheometers In the case of the DV III Rheometer programs are created then loaded into the Rheometer using the RheoLoader software Some features of the scripting language are Repeatedly run the same program for quality control purposes Wait for a prevailing condition before continuing with the program i e torque value a temperature value a key press etc e Run the Rheometer at any of the speeds in the Custom Speed menu Display messages to the screen or an attached printer to aid in operator usability Aninternal clock that keeps time between each printed data line this time is displayed as the last parameter on each printed line providing a consistent time base for the collected data VI 1 Description of B E V I S Commands Command Code Required Parameter Command Description WTI Time MM SS The program waits at this step until the specified time elapses WPT 96 Torque value The program waits at this step until the current 96 torque equals the 96 especifed value WTP Temperature value The program waits at th
88. th to reach the test temperature 3 The Viscometer has been supplied with a special cone spindle s which contains the Electronic Gap Setting feature The CPE part number designation on the cone verifies the Electronic Gap Setting feature Note The CPE cone or cup cannot be used with earlier DV III4 cone plate Viscometers below S N50969 which do not have the electronic gap setting feature 4 With the motor off thread the cone spindle by using the spindle wrench to secure the viscometer coupling nut see Figure A2 gently push up on the coupling nut and hold this securely with the wrench Thread the cone spindle by hand Note Left Hand Threads 5 Attach the cup taking care not to hit the cone with the cup Figure A3 The viscosity of electrically conductive fluids may be affected if readings are taken with the Electronic Gap Setting feature on Be sure to shut the feature off before taking readings Brookfield Engineering Laboratories Inc Page 53 Bath Circulator or CPE 44P Figure A2 Micrometer Adjustment Ring Coupling Nut i These surfaces Y dines must be clean CPE Cone E M E oO Figure A3 Do Not hit the u CONE with the CUP Figure A4 Manual No M 98 211 A1199 A 3 SETTING THE GAP 1 Move the toggle switch to the right this will turn on enable the Gap Setting Feature The Pilot red light will be illuminated 2 If the contact l
89. the ENTER key The test will end when the specified time interval has elapsed The data will be shown as displayed in Figure 66 The SELECT DISPLAY key can be used to view all measurement parameters The PRINT key can be used to send a single dataline to the printer CENE RPH FF SPINDLE 31 TEHF 72 1 F FETH TIMED STOP TEST DOHE nma ED ci Figure 66 Note Continuous print mode may be used in conjunction with Timed Stop to print data throughout the time period Printing will occur only during the test TIMED AVERAGE The DV III will collect a specified number of data points over a period of time and present the average reading arithmetic average Time speed and the number of data points are entered using the number keys and OPTIONS TAB key The test will begin immediately upon the press of the ENTER key Non averaged data will be displayed during the test The test will end when the specified time interval has elapsed The averaged data point will be shown as displayed in Figure 67 The SELECT DISP key can be used to view the average value of all measurement parameters The PRINT key can be used to send a single averaged dataline to the printer Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 DATA AVERAGING READIt D OVER AVERAGE TOREJ Figure 67 Note Printing during a Timed Average test will show non averaged data Averaged data is available only at the conclusion of the
90. tions are numbered 0 through 9 These speed sets are retained in EEPROM memory for those times when the DV III is not powered up To access a previously programmed speed set or to enter data for a new speed set the user presses the 1 key when in the display of Figure 20 and is presented with the screen shown in Figure 21 Brookfield Engineering Laboratories Inc Page 22 Manual No M 98 211 A1199 A SFEED SET OFERATIONS i ENTER EDIT A FPGM 2 CLEAR SPEED SET 3 USE SPEED SET Figure 21 At this point the user may Enter Edit Clear or Use a stored program Speed Set Let s startwith Enter Edit by pressing the 1 key IH MENS RURIL 3 USE SET Figure 22 In this example the user is informed that he has 6 speed sets 0 1 2 5 8 9 pre programmed in memory and 4 speed sets 3 4 6 7 not programmed and available Select any one of the ten speed sets by pressing the appropriate numeric key Pressing the MOTOR ON OFF ESCAPE key at this point would exit the user to the default PROGRAM MODES display Figure 20 For now let s assume that the user wants to program a new speed set by pressing the 3 key the first available program slot 6 ENTERING A SPEED SET PROGRAM There are two 2 types of programs available to the user programs with finite step time intervals and programs with zero 0 step time intervals We will cover the inputting of finite step time programs first SPEED SETS WITH FINITE STEP
91. tress calculations are done and the data displayed is zero 0 for these functions Table D1 SPINDLE ENTRY CODE o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 qgan PARN od t Q2 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 Table D1 continued SPINDLE ENTRY CODE SC4 27 SC4 28 SC4 29 SC4 31 SC4 34 SC4 37 CP40 CP41 CP42 CP51 LOL Spiral Adapter Thermosel DIN spindle SSA DIN spindle for 13R or 13RP chamber SSA DIN spindle for 7R or 7RP chamber ULA DIN spindle ULA DIN spindle ULA DIN spindle Table D2 lists the model codes and spring torque constants for each Rheometer model Table D2 D e 0 Mi e10 5 ON DV III SCREEN LVDV III 2 5xLVDV IIT SxLVDV III 1 4 RVDV TII 1 2 RVDV III RVDV IIL HADV III 2xHADV III 2 5 XxHADV III HBDV III 2xHBDV III 2 5XxHBDV III 5xHBDV III7 The full scale viscosity range for any DV III4 model and spindle may be calculated using the equation 10 000 where Full Scale Viscosity Range cP TK SMC RPM TK SMC DV III Torque Constant from Table D2 Spindle Multiplier Constant listed in Table D1 Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 The Shear Rate calculation is Shear Rate 1 sec SRC RPM where SRC Shear Rate Constant from Table D1 Using Non standard spindles with DV III and RHEOCALC Software Spindle Entry 99 allows en
92. try of spindle constants which the DV IIT will use to calculate Viscosity Shear Rate and Shear Stress for spindles in boundary conditions other than the 600ml beaker or specified chamber The spindles must conform to geometries that allow for mathematical calculations of Shear Rate and Shear Stress i e coaxial cylinder Two constants are required a SMC Spindle Multiplier Constant which is used to calculate cP value b SRC Shear Rate Constant which is used to calculate Shear Rate and Shear Stress If SRC 0 Example LV 1 4 RV HA HB 1 7 spindles Shear Rate and Shear Stress values are not calculated and can not be displayed The SMC value for a spindle may be calculated as follows a For new spindle conditions you calculate the SMC using a Newtonian fluid of known viscosity Brookfield Viscosity Standard This is done in the container with the new dimensions at the controlled temperature specified for the viscosity standard fluid b The new full scale viscosity range is calculated for a selected RPM 100n R1 Y where R1 The new full scale viscosity range The viscosity in cP of the Newtonian fluid The Torque reading at the selected RPM S How M c The SMC Value is then calculated SMC Full Scale Viscosity Range cP Selected RPM TK 10 000 where TK DV III Torque Constant from Table D2 The SRC value may be calculated for cylindrical spindle geometry using the following equation Shear R
93. xternal control mode connect cable DV P 80 to the serial port on the DV III base before turning on the DV III With the DVP 80 cable in place the DV III will present the screen shown in Figure 18 when it is turned on If external control is selected the DV III will display Figure 19 and only accept control commands from RHEOCALC software Brookfield Engineering Laboratories Inc Manual No M 98 211 A1199 re ERODKFIELD DU III RHEOMETER ESTERMAL CONTROL STAMDALOWE MODE Figure 18 a ERODKFIELD DU III RHEOMETER UB B HA EXTERNAL CONTROL AOS Figure 19 The DV III 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 III on Note The DV III cannot communicate with RHEOLOADER software in the external control mode Chose Stand Alone when presented with Figure 18 if you want to use RHEOLOADER Brookfield Engineering Laboratories Inc Page 18 Manual No M 98 211 A1199 lll MAKING VISCOSITY MEASUREMENTS lll 1 Quick Start The DV III Rheometer uses the same methodology as the Brookfield Dial Reading Viscometer and DV series of Digital Viscometers If you have experience with other Brookfield equipment this section will give you the 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 A B

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