Home

BROOKFIELD DV-II+ PROGRAMMABLE VISCOMETER Operating

1. 19 2 1 Temperature DisSplay uuu il gut p ga co 20 III 2 2 Units of Measurement 4 44 044011 yaqa qasaqa 20 11 23 Motor Speed 21 11 24 Printer Output a nnn nnne 22 III 2 5 Data Avord EET 22 W Time u EE tee u dc 23 11 3 1 1116 16 SIOD 24 322 G Em 26 III 3 3 Print Time Interval ucc lu at ote perdent Ged Slane edu ks 28 1 3 4 Program On Off enne nnne nnne 29 III 3 5 Download a Pri6ogIrGfii y errem Dee ae Reate ase ER ratu 29 III 3 6 R n a Proa u EE 30 OA BIER SO 33 IV 1 BiB V S OVCIVIGW 33 IV 2 Description of B E V I S Commands 34 IMS Greating a B E V L S Programs see tet eet beet aka EE e ud ko ede n tek 35 IV 4 Downloading a B E V I S Program sse nennen enne 37 IVs Example Prog succede bana ayayasqa Email nude rect m de c 38 Appendix A Cone Plate Viscometer Set Up n 40 Appendix B Viscosity Rangos cederet rune conem nempe 44 Appendix C Variables in Viscosity nn 47 Appendix D Spindle
2. If the above do not rectify the problem do the following V Shut off viscometer V Attach printer V Press and hold the MOTOR ON OFF and ENTER AUTORANGE keys simulanteously while turning the viscometer power on Figure J1 appears on the viscometer display Figure J1 V Press ENTER AUTORANGE key and Figure 72 appears Figure J2 V Scroll to YES and press the ENTER AUTORANGE key Figure J3 appears Figure J3 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 V Press ENTER AUTORANGE Information similar to Figure J4 will appear on your printer output Timed Stop Minutes Seconds RPM Time to Torque Torque RPM Print Interval Minutes Seconds Printer Port Parallel or Serial Parallel Last Spindle Used 05 Special Spindle SMC 0000 000 Special Spindle 5 00 000 Special Spindle SMC 0000 000 Special Spindle BB SRC 00 000 Special Spindle SMC 0000 000 Special Spindle 5 00 000 Special Spindle DD SMC 0000 000 Special Spindle DD 5 00 000 Display Units CGS Temperature Scale C Speed Set INTERLEAVE Viscometer Model RV Last BEVIS Program 1 Raw Temps 2 0 00 Torque Scale E19F Figure J4 V Call Brookfield to review the information on your printer output V Figure J5 next appears on the viscometer display Turn the viscometer power off Figure J5 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Appendix K Warranty Repair and Service War
3. When the desired spindle code is displayed release the ARROW key to halt further scrolling Press the SELECT SPINDLE key once again This will cause the S character to cease blinking and the new spindle code will be accepted for use in viscometer calculations Note You have approximately three seconds in which to press the SELECT SPINDLE key before the b inking stops If you fail to press the SELECT SPINDLE key before the blinking stops you will have to repeat the above steps and re select the desired spindle The DV II will begin to calculate using the new spindle parameters as soon as the SELECT SPINDLE key is pressed the second time Note The number 99 spindle is for use with special spindles when using Brook field s WINGATHER computer program Refer to the WINGATHER operator manual for further information on using 99 spindles The DV II may also be programmed at Brookfield Engineering for special user spindles These special spindles will appear on the spindle scroll list starting with designation and continuing through AZ Contact Brookfield Engineering regarding your needs for special spindles Brookfield Engineering Labs Inc Manual No M 97 164 D1000 II 3 Speed Selection Setting Running There are 54 speeds programmed into the DV II These speeds correspond to the standard LVT RVT HAT HBT LVF and RVF dial models 18 possible speeds altogether plus 36 additional speeds T
4. 1 3 Determine appropriate sample volume Refer to Table A6 to determine the correct sample volume required for the spindle to be utilized 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 LVDV II Viscometer Cone Spindle CPE 42 Brookfield Example Silicone Viscosity Standard having a viscosity of 9 7 cP at 257C 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 With the motor off remove the sample cup and place the viscosity standard fluid into the cup Brookfield Engineering Labs Inc 4 Table A1 Sample Volume Attac
5. The last scrolled to speed does not necessarily have to be the same as the speed at which the DV is currently running The user may operate at a given speed and pre set the DV II to the next desired speed before that speed will be used For example if the D V II is currently running at 6 0 RPM and was previously scrolled to 12 RPM a single press of either ARROW key would result in the Figure 9 screen display Figure 9 Pressing the SET SPEED key would cause the DV II to begin running at 12 RPM If the user did not press the SET SPEED key the DV II would continue to run at its current speed of 6 RPM In fact you may scroll to a new speed 12 RPM in this example and press the SET SPEED key at any future time without further pressing an ARROW key to immediately cause the to run at the new speed Pressing the ARROW key at any time reminds the operator of what was Brookfield Engineering Labs Inc Manual No M 97 164 D1000 selected for the next speed If an ARROW key is pressed and held the D V II will scroll up or down through the speed table When it reaches the last speed in the list either at the top or bottom of the list the speed displayed will roll over to either the first or last speed in the table and the scroll action will continue When the required speed is displayed release the ARROW key to halt further scrolling You have approximately two seconds before the blinking RPM stops in which to p
6. 97 164 D1000 Appendix D Spindle and Model Codes Each spindle has a two digit entry code which is entered via the keypad on the DV II The entry code allows the DV II to calculate Viscosity Shear Rate and Shear Stress values Each spindle has two constants which are used in these calculations The Spindle Multiplier Constant SMC used for viscosity and shear stress calculations and the Shear Rate Constant SRC used for shear rate and shear stress calculations Note that where SRC 0 no shear rate shear stress calculations are done and the data displayed is zero 0 for these functions Table D1 SPINDLE ENTRY CODE 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 0 1 1 1 1 1 1 1 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Table D1 continued 14 15 16 18 21 25 27 28 29 31 34 37 40 41 42 51 52 Table D2 lists the model codes and spring torque constants for each Viscometer model Table D2 MODEL CODE ON SCREEN LVDV II 0 09373 2 5LVDV II 0 2343 SLVDV II 0 4686 1 4 RVDV II 0 25 1 2 RVDV II RVDV II HADV II 2HADV II 2 5HADV II HBDV II 2HBDV II 2 5 SHBDV II Brookfield Engineering Labs Inc Manual No M 97 164 D1000 The full scale viscosity range for any DV II model and spindle may be calculated using the equation Full Scale Viscosity Range cP TK
7. SMC gt D where TK DV II Torque Constant from Table D2 SMC Spindle Multiplier Constant from Table D1 The Shear Rate calculation is Shear Rate SRC RPM where SRC Shear Rate Constant from Table D1 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Appendix Calibration Procedures The accuracy of the D V II 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 E1 Silicone Oils and Table E2 Mineral Oils Container size Temperature Conditions Normal 25 C Standard Fluids Viscosity cP Brookfield Engineering Labs Inc 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 gt 30 000 cP use the fluid container Inside Diameter 3 25 8 25cm Height 4 75 12 1cm Note Container may be larger but may not be smaller As stated on the fluid standard label 0 1 C The DV I should be set according to the operating instructions The water bath must be stabilized at test temperature Viscometers with the letters LV or RV in the model designation must have the guard leg attached see page 34 for more information o
8. Section IV for information on how to create B E V I S programs on a PC which can be downloaded to the D V II Programmable Viscometer Press the ENTER AUTORANGE key to download a B E V I S program as shown in Figure 56 Figure 56 Select a number from one 1 to four 4 using the UP DOWN ARROW keys assign a storage location for the program to be downloaded Note Remember to keep track of what program is in what slot If you elect to download a new program to an active slot you will overwrite the program currently residing in that slot The programs are saved automatically when the viscometer is turned off After selecting the slot number press the ENTER AUTORANGE key and the screen shown in Figure 56 changes as follows the top line flashes while the bottom line disappears This flashing screen will be displayed for as long as it takes to download the program At the end of the download Figure 57 is displayed Figure 57 If a PC is not attached Figure 58 will be displayed Figure 58 A press of any key except the MOTOR ON OFF ESCAPE key will take the user back a level to Figure 56 where you may elect to download another program or witha press of the MOTOR ON OFF ESCAPE key return to the screen of Figure 55 11 3 6 Run a Program In the Options menu scroll to the screen shown in Figure 59 Figure 59 Press ENTER AUTORANGE key to run a B E V I S program as shown in Figure 60 Brookfield Engineerin
9. Speeds list box becomes enabled when the cursor is placed in the parameter column for an SSN command Click on the down arrow to display a list of available speeds Click on the desired speed and it will be inserted into the appropriate parameter column in the program grid The same applies to the spindle command SSP Figure 67 The buttons shown on the main screen are explained below COM Port Select the COM RS 232 port the Programmable DV II viscometer is connected to NONE from the Port drop down list Click the Open File button to load existing B E V I S programs Open 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 box into the selected row in the program grid Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Up EA Down Clear i Download Click the Delete button to delete the B E V I S command in the selected row of the program grid Click the Up button to move the B E V I S command in the selected row of the program grid up one row Click the Down button to move the 1 5 command in the selected row of the program grid down one row Click the Clear button to clear the grid of all B E V I S commands Once cleared the commands cannot be retr
10. Version 1 1 software program When ON you may enter the Options menu but will not be allowed to make any option selections until the PC PROG is turned OFF All front panel keys will function normally when you turn the option ON and return to normal viscometer operation by pressing the MOTOR ON OFF ESCAPE key When OFF the DV II will return to the last set print time interval when printing is resumed From the Options menu scroll to the screen shown in Figure 53 Figure 53 Press the OPTIONS TAB key to display Figure 54 Figure 54 Pressing the OPTIONS TAB key would return you to the screen display of Figure 53 Repeated pressing of the OPTIONS TAB key would cause you to toggle back and forth between the displays of Figure 53 and Figure 54 To turn high speed output ON press the ENTER AUTORANGE key when the appropriate screen is displayed Then press the MOTOR ON OFF ESCAPE key to exit the Setup mode This returns you to the default screen display and resumes normal viscometer operation with high speed output enabled and normal printer operation using the last entered print time interval Note For access to B E V I S option PC PROG must be OFF 11 3 5 Download a Program Please refer to Section IV for details on how to create a program before proceeding with this section In the Options menu scroll to the screen shown in Figure 55 Figure 55 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Refer to
11. 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 1 Support pointer shaft with white nylon shipping cap as shown in Figure K1 or with white plastic shipping cap originally supplied with instrument I 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 1 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 L Y this form please include a memo indicating the type Eosindnasert CONE 1 Fill out a copy of the Viscometer Information Sheet or Tissue Paper PLATE on page 74 with as much information as possible to help expedite your service If you do not use of problem you are experiencing or the service you need performed Please also include a purchase E order number for us to bill against 1 Package the instrument and related items in a strong Zu box for shipping Mark the outside
12. 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 Selecta 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 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Interpretation of Calibration Test Results When verifying the calibration of the DV II the instrument and viscosity standard fluid error must be combined to calculate the total allowable error The DV II is accurate to 1 of any full scale spindle speed viscosity range Brookfield Viscosity Standards Fluids are accurate to 1 of their stated value Calculate the acceptable range of viscosity using RVDV II 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 10 000 Where TK 1
13. intervals When seconds reaches zero 0 the minutes value will decrement by one 1 minute This will continue until all of the time has elapsed at which point the viscometer will display the following screen Figure 42 At this point the viscometer will stop the motor and continue to display this screen until any key except the UP or DOWN ARROW key the PRINT key or the SELECT DISPLAY key is pressed The user can while this display is current press the UP or DOWN ARROW keys to view the torque and speed that were current at the time the display was frozen The display would appear as follows Figure 43 The display will switch between that of Figures 42 and 43 for each press of the UP or DOWN arrow keys A press of the PRINT screen would send one standard print line to the attached printer for each press of the PRINT key As stated above pressing any key except the UP or DOWN ARROW keys the PRINT key or the SELECT DISPLAY key will cause the viscometer to exit the Time To Stop mode and resume operation with the screen of Figure 40 displayed awaiting another Timed Stop run The user can press the PRINT key while in either of these two screens Figures 42 and 43 to send one Brookfield Engineering Labs Inc Manual No M 97 164 D1000 standard print string to the attached printer as many times as the user presses the PRINT key In addition the PRINT key can be pressed during the actual measurement to obtain instantaneous data Pr
14. key except the UP or DOWN ARROW keys the PRINT key or SELECT DISPLAY key is pressed The user can while this display is current press the UP or DOWN ARROW keys to view the viscosity that was current at the time the display was frozen The display would appear as follows Figure 49 The display will switch between that of Figures 48 and 49 for each press of the UP or DOWN ARROW keys As stated above pressing any key except the UP or DOWN ARROW or PRINT keys will cause the viscometer to exit the Time To Torque mode and resume operation with the screen of Figure 44 displayed awaiting another Timed Torque run The user can press the PRINT key while in either of these two screens Figures 48 and 49 to send one standard print string to the attached printer as many times as the user presses the PRINT key In addition the PRINT key can be pressed during the actual measurement to obtain instantaneous data Pressing any other key will exit this mode and return the viscometer to normal operation Note For both of the methods of Sections 3 1 and III 3 2 the following apply 1 For the Timed Stop method the DV II viscometers will retain the last value for the time interval so that it will become the default the next time the user elects to use this method 2 For the Time To Torque method the DV II viscometers will retain the last entered torque value for use when next the user elects to perform a time to torque test 3 The user can s
15. 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 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 Labs Inc Manual No M 97 164 D1000 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 UPS Next Day Jj UPS 2nd Day LJ Federal Express J Federal Express Account Number required SERVICE INFORMATION Operating Conditions Spindle Speed Viscosity Range Temp Control Temperature of Sample Did you contacting Brookf
16. rack facing forward Note 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 Use a small screwdriver or pencil to move it into the correct position The VS 29W Belleville spring 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 Caution Do not tighten the clamp knob unless the viscometer mounting rod is inserted in the clamp assembly Center the Viscometer relative to the stand base and retighten the jam nut as required Referring to the Viscometer bubble level adjust the leveling screws until the instrument is level Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Model A Laboratory Stand Provided with instruments shipped before October 1 1999 VS 24Y MODEL A CLAMP ASSEMBLY VS 17AY MODEL A E CLAMP ASSEMBLY FOR EXPLOSION PROOF MODELS BROOKFIELD LABORATORY VISCOMETER 6 5051032085258 SCREW 10 32X 1 4LG SLOTTEDSET 1 7 VS7Y GEARSCREWASSEMBLY 1 8 ve2ev CLAMP SCREW ASSEMBLY 1 9 VSX amp 17zY CLAMPASSEMBLY Tt 10 vsxa 6Y MODEL A E CL
17. the OPTIONS TAB key to enter the seconds setting display Figure 52 Using the UP and DOWN ARROW keys enter a value for the seconds portion of the print interval This value can be between zero 0 and fifty nine 59 seconds The value for minutes or seconds must be other than zero 0 or you will print continuously when you exit this mode A press of the MOTOR ON OFF ESCAPE key would exit this option and take you back to the screen of Figure 50 Continued pressing of the OPTIONS TAB key will toggle between the minutes and seconds input screens Press the ENTER AUTORANGE key to accept the new values for print interval in minutes and seconds You will now be in the screen display of Figure 50 where you may re enter the print interval mode or exit to the default screen Figure 7 by pressing the MOTOR ON OFF ESCAPE key Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Activating print selections in the Print mode can only be done by exiting to the main menu and pressing the PRINT key for four 4 seconds P will flash in front of the torque reading confirming that you are now in the Print Interval mode Pressing PRINT for one 1 second thereafter will disable the Print mode and remove the P from the display 1 3 4 PC Program On Off This option causes the serial port of the DV II viscometer to go into a high speed output mode approximately 3 print lines per second for use with Brookfield WINGATHER
18. 0 from Table D2 SMC 10 from Table D1 Full Scale Viscosity Range 1 10 1000 50 000 The viscosity 15 accurate 500 cP which 15 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 4 622 57 cP 4 Therefore any viscosity reading between 11 634 4 and 12 879 6 cP indicates that the Viscom eter is operating correctly Any reading outside these limits may indicate a Viscometer problem Contact the Brookfield technical sales department or your local Brookfield dealer distributor with test results to determine the nature of the problem The Brookfield Guardleg The guard leg was originally designed to protect the spindle during use The first applications of the Brookfield Viscometer included hand held operation while measuring fluids in a 55 gallon drum It is clear that under those conditions the potential for damage to the spindle was great Original construction included a sleeve that protected the spindle from side impact Early RV guard legs attached to the dial housing and LV guard legs attached to the bottom of the pivot cup with a twist and lock mechanism The current guard leg is a band of metal in the shape of the letter U with a bracket at the top that attaches to the pivot cup of a Brookfield Viscometer Rheometer Because it must attach to the pivot cup the guard leg cannot be used with a Cone Plate instrume
19. 00 CU 600 ml Low Form Griffin Beaker Figure H2 Figure H3 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Appendix Fault Diagnosis and Troubleshooting Listed are some of the more common problems that you may encounter while using your Viscom eter 1 Spindle Does Not Rotate V Make sure the viscometer is plugged in v Check the voltage rating on your viscometer 115 220V it must match the wall voltage V Make sure the motor is ON and the desired rpm is selected 2 Spindle Wobbles When Rotating or Looks Bent V Make sure the spindle is tightened securely to the viscometer coupling V Check the straightness of all other spindles replace if bent v Inspect viscometer coupling and spindle coupling mating areas and threads for dirt clean threads on spindle coupling with a 3 56 left hand tap Inspect threads for wear if the threads are worn the unit needs service see Appendex Check to see if spindles rotate eccentrically or wobble There is an allowable runout of 1 32 inch in each direction 1 16 inch total when measured from the bottom of the spindle rotat ing in air V Check to see if the viscometer coupling appears bent if so the unit is in need of service see Appendix K How to Return Your Viscometer If you continue to experience problems with your viscometer follow this troubleshooting section to help isolate potential problems Perform an Oscillation Check 4 Remove
20. 1 the step number and the total program steps S00 12 and the elapsed time since the program or step began 00 14 While in this wait state you can press the OPTIONS TAB key to see the viscometer default screen in Figure 65 the PGM will be flashing Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Figure 65 The DVLOADER Software is used to create save print and down load programs to the DV II Programmable Viscometer The next section explains how to use the DVLOADER software Brookfield Engineering Labs Inc Manual No M 97 164 D1000 IV DVLOADER SOFTWARE The DVLOADER software is a WINDOWS based program provided on a 3 1 2 diskette which comes with the Programmable DV II Viscometer IV 1 B E V I S Overview DVLOADER utilizes B E V I S Brookfield Engineering Viscometer Instruction Set a script ing language that allows for the creation of programs to control the Programmable DV II Viscometer Programs are created on a PC then loaded into the viscometer using the DVLoader software Some testing capabilities that are possible include the following Repeatedly run the same test program for quality control purposes Wait for a specific condition before continuing with the test i e a torque value a tempera ture value a key press etc Run the viscometer at any of the speeds in the Custom Speed menu Display messages to the screen or an attached printer to aid the operator An interna
21. 164 D1000 1 1 Components Component Part Number Quantity DV II Viscometer varies Model S Laboratory Stand MODEL S Spindle Set with Case varies LVDV II set of four spindles or SSL RVDV I set of seven spindles or SSR HA HBDV II 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 DVP 65 for 115 or DVP 66 for 230 RTD Temperature Probe DVP 94Y Guard Leg LVDV II B 20Y RVDV II B 21Y Carrying Case DVE 7Y DVLOADER Software Disk 3 1 2 DVLOADER Interconnecting Cable DVP 80Y Operating Manual M 97 164 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 1 2 Utilities Input Voltage 115 VAC or 230 VAC Input Frequency 50 60 Hz Power Consumption Less than 20 WATTS Power Cord Color Code United States Outside United States Hot live Black Brown Neutral White Blue Ground earth Green Green Yellow 1 3 Specifications Speeds Interleaved LV RV 18 speeds Sequential LV RV 18 speeds Custom 54 speeds user selectable Note Refer to Appendix F for detailed list of all speeds Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Weight Gross Weight 23 Ibs 10 5 kg Net Weight 20 lbs
22. 200 000 5 120 102 400 000 20 480 409 600 000 11 7 234 325 2 500 000 250 5 000 000 1 000 20 000 000 23 4 468 650 5 000 000 500 10 000 000 2 000 40 000 000 46 9 937 300 10 000 000 1 000 20 000 000 4 000 80 000 000 15 300 000 3 200 000 320 6 400 000 1 280 25 600 000 30 600 000 6 400 000 640 12 800 000 2 960 51 200 000 9 This spindle used with Small Sample Adapter only N represents speed in RPM For example spindle SC4 14 operated at 5 rpm has a shear rate of 0 40 x 5 2 0 sec Range and spindle constant information for spindles 82 and 83 are listed on Brookfield Technical Sheet T95 954 Consult Brookfield or your Brookfield dealer for information on spindles 81 and 37 UL Adapter Viscosity cP UL Spindle LVDV II RVDV II HADV II HBDV II YULA 15 or 152 1 2 000 3 2 2 000 6 4 2 000 25 6 2 000 1 22N Brookfield Engineering Labs Inc Manual No M 97 164 D1000 DIN Adapter Accessory Viscosity cP Shear Rate DAA Spindle LVDV II RVDV II HADV II HBDV II sec 1 0 6 5 000 6 1 5 000 12 2 5 000 48 8 5 000 1 22 1 8 10 000 18 2 10 000 36 5 10 000 146 10 000 1 29 5 7 50 000 61 50 000 121 50 000 485 50 000 1 29N Spiral Adapter Viscosity cP Shear Spiral Rate Spindle LVDV II RVDV II HADV II HBDV II sec 1 98 98 500 1 050 1 050 000 2 100 2 100 000 8 400 8 400 000 00677 67 7N 1 100 RPM Cone Plate Visco
23. 5 arelatively high number compared to the instrument reading Brookfield Engineering Labs Inc Manual No M 97 164 D1000 The second consideration involves the mechanics of fluid flow Allrheological 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 can not be analyzed with standard math models This turbulence creates a falsely high Viscometer 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 60 RPM Turbulent conditions will exist in these situations whenever the RPM cP ratio exceeds the values listed above Brookfield Engineering Labs Inc Page 46 Manual No M 97 164 D1000 Appendix C Variables in Viscosity Measurements As with any instrument measurement there are variables that can affect a Viscometer measurement These variables may be related to the Instrument Viscometer or the te
24. 9 kg Carton Volume 1 65 cu ft 0 05 m3 Temperature sensing range 100 C to 300 C 148 F to 572 F Analog Torque Output 0 1 Volt DC 0 100 Torque Analog Temperature Output 0 4 Volts DC 10mv C RS232 Compatible Serial Port for use with an attached printer or PC Centronics Compatible Parallel Port for use with an attached printer Viscosity Accuracy 1 0 of full scale range Viscosity Repeatability 0 2 Temperature Accuracy 1 C 100 C to 149 C 2 C 150 C to 300 C Electrical Certifications CUL expected by April 2000 CE l 4 Installation 1 Assemble the Model S Laboratory Stand refer to assembly instructions in Appendix H 2 Connect the RTD probe to the socket on the rear panel of the DV II 3 The Viscometer must be leveled The level is adjusted using the two leveling screws on the base Adjust so that the bubble level on top of the DV II is centered within the circle Note Check level periodically during use 4 Remove the white shipping cap which secures lower coupling nut on Viscometer to pivot cup 5 Make sure that the AC power switch at the rear of the DV II is in the OFF position Connect the power cord to the socket on the back panel of the instrument and plug it into the appropriate AC line The AC input voltage and frequency must be within the appropriate range as shown on the name plate of the Viscometer Note The DV II must be earth grounded to ensure against electronic fai
25. AMP SCREW ASSEMBLY 1 ROD EXTENSION 4 LONG OPTIONAL BLM 4E 2 ROD EXTENSION 8 LONG OPTIONAL 505252024 140 SCREW 1 4 20 X 3 4 LG SOC HD CAP 18 8 SS ajajajaja Figure H2 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Unpacking Check carefully to see that all the components are received with no concealed damage 1 base jam nut 3 leveling screws clamp assembly 1 upright rod Remove the three 3 leveling screws from the base and discard the packing material Remove the jam nut from the upright rod Assembly Refer to Figure H2 Screw the leveling screws into the base Insert the threaded end of the upright rod into the hole in the top of the base and attach the jam nut to the rod on the underside of the base With the rod gear rack facing forward toward the V in the base gently tighten the jam nut Viscometer Mounting Insert the Viscometer mounting rod into the hole with the cut away slot in the clamp assembly Adjust the instrument level until the bubble is centered from right to left and tighten the Clamp Screw clockwise Note The small clamp adjusting screw Figure on the clamp assembly should be loosened or tightened as necessary to provide smooth height adjustment and adequate support for the Viscometer Center the Viscometer relative to the stand base and retighten the jam nut as required Referring to the Viscometer bubble level adjust the leveling scr
26. BROOKFIELD DV II PROGRAMMABLE VISCOMETER Operating Instructions Manual No M 97 164 D1000 SPECIALISTS IN THE K FIELD 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 FAX 508 946 6262 www brookfieldengineering com TABLE OF CONTENTS I Ri 3 1 1 ERREUR 4 1 2 Buren 4 1 3 eren 4 1 4 E E 5 1 5 Koy FUNCIONS TEE 6 I PPR PRP e SARE DD IPPPPPPPYWWIW TIWWIWIWWI 1 J 8 11 1 nur E 8 II 2 Spindle Selection 9 1 3 Speed Selection Setting Running 10 1 4 II 11 1 5 ease T E 12 1 6 QUT OT Range EE 13 1 7 Temperature DIS Play ie oett egt ege et troc terque E Ene oer Cap e entr Dona te 14 II 8 Pim r E EE 14 II 9 Making Viscosity Measure Menis uuu uu u a nnne nnn nennen 15 1 10 Time Modes for Viscosity 16 E or 17 III 1 Introduction to OP TONS Sessies aasan 17 2 SOLU Pas serve dies
27. M RV 5 29 5 2 cP 1040 D CM2 130 1 5 12 3 T 20 1C 700 30 Negative Torque Operation see Fig 17 RPM 50 M RV 5 29 0 1 2 0 1 5 12 3 T 20 1C Z00 30 Torque Range T Temperature Z Time Figure I8 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 ll 7 Temperature Display DV II displays the temperature measured by its RTD temperature probe Temperature may be displayed in either C Centigrade or F Fahrenheit units depending upon selection from the Options menu As received the default temperature display will be in C Centigrade units as shown in the Figure 19 Figure 19 If you turn on the DV II with the temperature probe disconnected or remove the temperature probe at any point after power up the display will indicate C The four dashes indicate the absence of the probe If you were displaying temperature in Fahrenheit units the C would be replaced by an F Accuracy of temperature measurement for the DV II is shown in Table 1 Table 1 Temperature Accuracies for Programmable DV II Viscometer Temperature Range Temperature Accuracy 100 C to 149 C 1 0 C 150 C to 300 C 2 0 C II 8 Printing The DV II will print data to an attached Serial RS232 or Parallel centronics printer The printer must be attached to the appropriate rear panel output connector See Appendix G for configuration and connection requiremen
28. SSEMBLY 1 EXPLOSION EROOF 3 14 508252024E140 SCREW 1 4 20 X 3 4 LG SOC HD CAP 18 8 SS 1 15 VS 46Y MODEL S E GEAR SCREW ASSEMBLY 1 16 VS 45Y MODEL S E CLAMP SCREW ASSEMBLY 1 Figure HI Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Unpacking Check carefully to see that all the components are received with no concealed damage 1 Base VS 2 with 2 Leveling Screws VS 3 packed in a cardboard carton 1 Upright Rod VS 34 with attached Clamp Assembly VS 35Y Assembly Refer to Figure H1 1 Remove the base assembly from the carton 2 Remove the screw and washer from the upright rod Place the rod and clamp assembly into the hole in the top of the base Note The Front designation on the clamp assembly should face the opening of the legs i e parallel to the leveling feet 3 Rotate the rod clamp assembly slightly until the slot on the bottom of the rod intersects the pin located in the base 4 While holding the rod and base together insert the slotted screw and washer as shown and tighten securely Viscometer Mounting Insert the Viscometer mounting rod into the hole with the cut away slot in the clamp assembly Adjust the instrument level until the bubble is centered from right to left and tighten the clamp knob clockwise Use the leveling screws to fine adjust the viscometer level Note If the Digital Viscometer cannot be leveled check to insure that the rod is installed with the gear
29. and Model 2024 0 1 1 000 0 49 Appendix E Calibration Procedures n nnns 52 Appendix F Speed Sels ue ettet ence etii dk Ere Ru a ER eaux was 59 Appendix Communications U Uu 60 Appendix Laboratory 5 nnne nnne tenen nns aaa a 63 Appendix DVE 50 Probe Clip n 67 AppendixJ Fault Diagnosis and Troubleshooting 68 Appendix K Warranty Repair and 72 I INTRODUCTION The Brookfield Programmable DV II Viscometer measures fluid viscosity at given shear rates Viscosity is a measure of a fluid s resistance to flow You will find a detailed description of the mathematics of viscosity in the Brookfield publication More Solutions to Sticky Problems acopy of which was included with your DV II The principal of operation of the DV II 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 measure ment range of a D V II in centipoise or milliPascal seconds is determined by the rotational speed of the spindle the size and shape of the spindle the container the spindle is rotati
30. attach the solid shaft spindle to the DV II 4 Allow 30 minutes for the viscosity standard sample chamber and spindle to reach test temperature 5 Measure the viscosity and record the Viscometer reading Note The spindle must rotate at least five 5 times before readings are taken Calibration Procedure using UL or DIN 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 II 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 Viscometer reading Note The spindle must rotate at least five 5 times before readings are taken Calibration Procedure using a Helipath Stand and T Bar Spindles When a Helipath Stand and T Bar spindles are used 1 Remove the T bar spindle and select a standard LV 41 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 2 T Bar spindles should not be used for verifying calibration of the DV II Viscometer Ca
31. chosen speeds will appear in ascending order for run selection beginning with speed 0 0 RPM 1 2 4 Printer Output Port Scrolling to the printer port option presents the following Figure 33 Pressing the OPTIONS TAB key toggles between the two port choices To select a printer output port press the ENTER AUTORANGE key while the desired choice is blinking This will cause the DV II to direct all further printer output to the chosen port while remaining in the Setup menu You must press the ENTER AUTORANGE key to select the flashing option 1 2 5 Data Averaging This feature will perform a rolling average on the displayed torque value and all other displayed viscometer data derived from torque Youare allowed to select the number of readings over which averaging is being done with ten 10 readings as the maximum There will be an initial delay as the first average is performed and then no apparent delay as the following readings are averaged the viscometer takes approximately 4 readings per second The rolling average is described as follows given the selected reading number X 1 The first X readings are collected placed in the averaging buffer averaged and displayed 2 The first reading in the averaging buffer is dropped the next reading the X 1 reading is placed in the buffer and the buffer is again averaged and displayed Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Step 2 is
32. e required for the selected spindle 3 Select a viscosity standard fluid that will give viscosity readings between 10 and 100 of full scale range Refer to Appendix B for viscosity ranges of cone spindles 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 locuni ILVDV II Viscometer Cone CP 42 Fluid 10 Having a viscosity of 9 7 cP at 25 C 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 0 1 cP for the viscometer plus 0 97 cP for the fluid The accuracy is a combination of Viscometer and fluid tolerance refer to Interpretation of Calibration Test Results 4 With the viscometer stopped remove the sample cup and place the viscosity standard fluid into the cup waiting 10 minutes for temperature equilibrium 5 Connect the sample cup to the Viscometer 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 Viscometer 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
33. e screen display shown in Figure 3 The viscosity measurement range is indicated by the information in the lower left in this case RV For most DV II Viscometers this information will be either LV or RV Figure 3 After a few seconds the following screen appears Figure 4 No key press is required at this point After a short time the display will clear and the following will be displayed Figure 5 After removing the spindle and pressing any key the DV II begins its Autozero The screen will flash Autozeroing After approximately 15 seconds the display shows the screen in Figure 6 Figure 6 Pressing any key at this point results in the display of the DV II default screen Figure 7 The display will vary depending upon the selection of temperature F or C and units of viscosity or mPaes Brookfield Engineering Labs Inc Manual No M 97 164 D1000 II 2 Spindle Selection LVDV II Viscometers are provided with a set of four spindles and a narrow guardleg RVDV II Viscometers come with a set of seven spindles and a wider guardleg HADV II and HBDV II Viscometers come with a set of seven spindles and no guardleg See Appendix E for more information on the guardleg The spindles are attached to the viscometer by screwing them onto the lower shaft Note that the spindles have a left hand thread The lower shaft should be secured and slightly lifted with one hand while screw
34. e shear stress value exceeds 99 999 scientific notation is used The next press of the SELECT DISPLAY key would display Shear Rate SR in 1 Sec see Figure 13 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Figure 13 One more press of the SELECT DISPLAY key would result in a return to the viscosity screen as shown in Figure 11 Notes 1 You may step through the display at any time This will not interrupt any Viscometer calculations that are in progress 2 Display of shear rate and shear stress requires selection of appropriate spindles Otherwise values displayed will be zero 0 Units of Measurement The DV II Viscometer can be configured using the SETUP option Section 2 2 to display print in either the CGS or SI system of units 1 5 Autorange AUTO RANGE The ENTER AUTO RANGE key functions as auto range and allows you to determine the maximum calculated viscosity full scale reading possible with the current spindle speed setting only when in the default screen Pressing the key at any time will cause the current viscosity display to change and show that maximum viscosity The screen area displaying torque will now display a flashing 100 0 to indicate this special condition This maximum viscosity and flashing 100 0 value will be displayed for as long as the ENTER AUTO RANGE key is depressed Figure 14 shows the AUTO RANGE function for the situation where the No 1 LV spindle
35. es over time and find that the 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 Viscometer Related Variables Most fluid viscosities are found to be non Newtonian They are dependent on Shear Rate and the spindle geometry conditions The specifications of the Viscometer spindle and chamber geometry will affect the viscosity readings If one reading is taken at 2 5 rpm and a second at 50 rpm the two 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 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 container wall and the spindle surface A repeatable viscosity test should control or specify the following 1 Test temperature 2 Sample container size or spindle chamber geometry 3 Sample volume 4 Viscometer model 5 Spindle used if using LVDV II 1 4 or RVDV II 1 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 Labs Inc Manual No M
36. essing any other key will exit this mode and return the viscometer to normal operation 1 3 2 Time to Torque On entry to this mode the user is presented with the following screen display Figure 44 Using the UP or DOWN ARROW keys the user enters a value for the torque level that you wish to reach Note The value for torque must be other than zero 0 and less than or equal to ninety nine 99 percent or you will not be able to continue At this point the user presses the OPTIONS TAB key and the screen shown in Figure 45 appears Figure 45 Using the UP or DOWN ARROW keys the user selects a speed from the currently selected speed set If you had opted to use the LVRV sequential or interleaved speed sets all those speeds would be available by pressing the UP or DOWN ARROW keys Conversely if the user had selected a custom speed set you would be limited to those speeds comprising the custom speed set After selecting the speed the user may press any one of three keys to continue the OPTIONS TAB key the MOTOR ON OFF ESCAPE key and the ENTER AUTORANGE key If the user presses the OPTIONS TAB key you will return to the torque input screen of Figure 44 where you may change the torque input if so desired Therefore continued pressing of the OPTIONS TAB key will toggle between the torque input screens and the motor input screen A press of the MOTOR ON OFF ESCAPE key will cancel the time to torque operation and take the user back to
37. est Results which appears later in this section 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 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 II Brookfield Engineering Labs Inc Manual No M 97 164 D1000 4 Allow 30 minutes for the viscosity standard sample chamber and spindle to reach test temperature 5 Measure the viscosity and record the Viscometer reading Note The spindle must rotate at least five 5 times before readings are taken Calibration Procedure for a Thermosel System Whena Thermosel System is used the controller stabilizes the Thermo Container at the test temperature 1 Put the proper amount of HT viscosity standard fluid into the HT 2 sample chamber The amount varies with the spindle used Refer to the Thermosel instruction manual 2 Place the sample chamber into the Thermo Container 3 Put the spindle into the test fluid and attach the extension link coupling nut and free hanging spindle or directly
38. et up a desired print interval time then set the viscometer to the continuous print mode and finally initiate either of the timed modes of operation While setting up the timed mode parameters continuous print operation will cease Brookfield Engineering Labs Inc Manual No M 97 164 D1000 However upon starting the timed operation the DV II will output an initial data string to the printer and then continue printing data strings at the user defined time interval for the duration of the timed run At the end of the timed run continuous printing will again be disabled and the user may print single strings of the final data point at your option until you exit the timed mode Upon returning to the default operation mode continous printing will again resume at the user selected time interval In a similar manner if you are in the once per PRINT key press mode when you enter the timed mode of operation you will be able to print data strings at any time during the timed mode by pressing the PRINT key 11 3 3 Print Time Interval This option is used to set the print time interval to the selected printer Scroll to Set Print Time as shown in Figure 50 Figure 50 Press the ENTER AUTORANGE key On entry Figure 51 is displayed Figure 51 Using the UP and DOWN ARROW keys enter a value for the minutes between successive print strings This value can be as high as fifty nine 59 minutes and as low as 00 When satisfied press
39. eturn to Zero V Viscometer is not level Check with spindle out of the sample Adjust the laboratory stand V Pivot point or jewel bearing faulty Perform calibration check Contact Brookfield Engineering Laboratories Inc or your Brookfield dealer for repair 1 Display Reading Will Not Stabilize V Special characteristic of sample fluid There is no problem with the viscometer Refer to Appendix C V Check for erratic spindle rotation Verify power supply Contact Brookfield Engineering Laboratories Inc or your Brookfield dealer for repair V Bent spindle or spindle coupling Contact Brookfield Engineering Laboratories Inc or your Brookfield dealer for repair V Temperature fluctuation in sample fluid Use temperature bath control Brookfield Engineering Labs Inc Manual No M 97 164 D1000 1 No Recorder Response Be Sure the viscometer is not at ZERO reading V Be sure the recorder is ON and not on STANDBY V Verify the range settings V Check cable leads for clean connection 1 Recorder Pen Moves in Wrong Direction y Output polarity reversed Reverse leads Viscometer Will Not Communicate with PC V Check the comm port and make sure the correct port is being utilized V Check the interconnecting cable for proper installation Y Check the Options menu and make sure the PC PROG is set to either ON or OFF in accordance with the operating instructions for the program procedure in use
40. ews until the instrument is level Operation Rotate the Gear Screw to raise or lower the viscometer Manual No M 97 164 D1000 Brookfield Engineering Labs Inc Appendix I DVE 50 Probe Clip Probe Clip DVE 50 is supplied with all model DV II Viscometers DV III Rheometers and Digital Temperature Indicators It is used to attach the RTD temperature probe to the LV Guard Leg Part No B 20Y or 600 ml low form Griffin beaker Figure is a view of the Probe Clip showing the hole into which the RTD probe is inserted and the slot which fits onto the LV guard leg When inserting the RTD probe into the Probe Clip the upper part of the Clip is compressed by squeezing the points shown in Figure Note All Viscometer Rheometer models except LV use the Probe Clip as shown in Figure H3 RTD Probe Hole Squeeze Here when installing RTD Temperature Probe Figure Figure H2 shows the Probe Clip with RTD temperature probe installed mounted on the LV guard leg Figure H3 shows the Probe Clip mounted in a 600 ml low form Griffin beaker This mounting may be used with LV RV HA and HB series instruments Note The RTD probe must be parallel to the beaker wall so as not to interfere with the viscosity measurement LV Guard Le Assembly BOY RTD Temperature Probe lt DVE 50 Probe Clip 600 ml 400 KIMAX Probe Clip m RTD Temperature DVE 50 gt 200 Jem 1
41. g Labs Inc Manual No M 97 164 D1000 Figure 60 Using the UP DOWN ARROWkeys select one of the four 4 stored programs Press the ENTER AUTORANGE key Any attempt to select a program slot that does not contain a program will result in a double beep for each key press When a valid program slot is selected the screen in Figure 61 is displayed Figure 61 At this point you may elect to print the B E V I S program by pressing the PRINT key or start the program immediately by pressing the ENTER AUTORANGE key remember pressing the MOTOR ON OFF ESCAPE key will stop the current operation and bring you back one menu level You may elect to print the program to confirm the slot choice as correct or simply to have it available later when reviewing data If you elect to print the program you will return to the screen of Figure 60 after the program is finished printing Pressing the ENTER AUTORANGE key exits the screen of Figure 60 and the program will start running On program start the screen could be any of the screens possible when running a B E V I S program A typical screen might be Figure 62 where the operator is instructed to mount a spindle 31 and then press a key to continue Or you might see Figure 63 followed by Figure 64 Here the B E V I S program is waiting for the temperature to reach one hundred 100 C before it continues to the next program step Also displayed is the program number P
42. h 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 97 164 D1000 Appendix B Viscosity Ranges Viscosity ranges shown are for operational speeds 0 1 through 200 rpm LV Viscometer with LV spindles 1 4 and RV HA HB Viscometers with spindles 1 7 Viscosity Range cP Viscometer Minimum Maximum LVDV II 6 000 000 RVDV II 40 000 000 HADV II 80 000 000 HBDV II 320 000 000 Small Sample Adapter and Thermosel SSA and Viscosity cP Thermosel Spindle LVDV II RVDV II HADV II HBDV II 58 6 1 171 00 12 500 000 1 250 25 000 000 5 000 100 000 000 23 4 468 650 5 000 000 500 10 000 000 2 000 40 000 000 60 1 199 700 12 800 000 1 280 25 600 000 5 120 102 400 000 1 5 30 000 320 000 Sc 640 000 128 2 560 000 2 4 46 865 500 000 50 1 000 000 200 4 000 000 240 4 790 000 51
43. he Custom Speed option SELECT DISPLAY Selects the data parameter to be displayed cP Viscosity cP or mPa s SS Shear Stress dynes cm2 or Newtons m2 SR Shear Rate 1 sec ENTER AUTO RANGE ENTER Used to execute the currently flashing option AUTO RANGE Presents the maximum 100 torque viscosity attainable using the selected spindle at the current viscometer spindle speed SELECT SPINDLE Initiates spindle selection on the first press and then selects the currently scrolled to spindle when pressed a second time PRINT Selects printing and non printing modes when a printer is attached Brookfield Engineering Labs Inc Manual No M 97 164 D1000 OPTIONS TAB OPTIONS Presents the Options menu flashing the last escaped option TAB Toggles between selectable items when indicated as shown in Figure 2 Note Symbol indicating the J OPTIONS TAB key Figure 2 Note Inverted text black background with white lettering indicates that the information is flashing on the viscometer display Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Il GETTING STARTED 1 1 Autozero Before readings may be taken the Viscometer must be Autozeroed This action is performed each time the power switch is turned on The display window on the Viscometer will guide you through the procedure as follows Turn the power switch located on the rear panel to the ON position This will result in th
44. he DV II comes with the Sequential Speed Set already selected see Appendix F The speed set will start at speed 0 0 It will then scroll up through the LV speeds pass through speed 0 0 again and then scroll up through the RV speeds pass through speed 0 0 again and then repeat the above sequence The DV II can also be configured by the operator to interleave the LV and RV speeds See Section 2 3 on Setup for a description of how to install the Interleave Speed Set A complete list of speed sets and custom speeds is included in Appendix F The DV II can be programmed to select up to 19 of the 54 speeds for use at any one time Speed 0 0 is the 20th speed and is automatically included See Section III 2 3 2 on Setup for a description of how to install a Custom Speed Set To select a Viscometer speed first press either the UP or DOWN arrow keys which will cause the area to the right of RPM to display the currently selected speed Figure 8 shows the DV II is operating at 6 0 RPM and the current selected speed is 6 0 RPM Figure 8 If the ARROW key is pressed just once and then released the characters RPM will blink for three seconds then will cease blinking resulting in no change to the speed entry Note The speed selection process remembers the last value of scrolled to speed so that the next time you initiate a speed change by pressing an ARROW key the DV II will begin its scroll display from the ast entered value
45. hrenheit On entry assuming the viscometer is currently displaying F you will be presented with Figure 26 A press of the OPTIONS TAB key at this point will toggle between the two available temperature scale options as shown in Figure 27 Figure 27 To select the temperature display mode press the ENTER AUTORANGE key You automatically exit the Setup menu with the viscometer displaying temperature in the selected scale You must press the ENTER AUTORANGE key to select the flashing option 2 2 Units of Measurement Selecting units of measurement is identical to that for temperature described above The screen display shows Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Figure 28 A press of the OPTIONS TAB key at this point allows the user to toggle between the two available data display units as shown in Figure 29 Figure 29 Pressing the ENTER AUTORANGE key selects the display units which are flashing followed by an exit of the Setup menu You must press the ENTER AUTORANGE key to select the flashing option 1 2 3 Motor Speed Set Selection This selection must be done with the motor off Scrolling in the Setup options menu to the speed set selection option yields the following screen display Figure 30 The last selected speed set option is displayed in this case Sequential For each press of the OPTIONS TAB key the display shows selectable options Figure 31 You must
46. ield before returning this instrument YI NL 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 Check NL Other Comments 1 Return the Viscometer to the attention of the Repair Department at the address above 1 Package the Viscometer for shipment as outlined on page 73 1 Include a purchase order or purchase order number with this form Brookfield Engineering Labs Inc Manual No M 97 164 D1000 wuoo Duueeuibuepjeixooiq wMM Z9Z9 9r6 80S XV4 6E18 8Z9 008 10 0029 976 809 TAL gt 90600 VW paeA lnog LL S3lHOLVHOSV1 SNIH33NION3 0731X0049 SNOISQTTONOO Manual No M 97 164 D1000 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 2 do ANOYOL uvaHs ALISOOSIA 8O19V43 DINER JIANIdS REL 31dWVS NOLLVINHOHNI 1531 45 LOY 1531 ALISOOSIA o ui
47. ieved Downloads a B E V I S program from the PC to the DV II Exits the DVLOADER software program and returns the user to the WINDOWS Program Manager IV 4 Downloading a 1 6 Program Before down loading a B E V I S program to the viscometer ensure the following have been checked Exit The appropriate cable BEL Part DVP 80 is connected between the selected COM port of the PC and the viscometer DV IJ motor must be OFF Set PC PROG to OFF The Programmable DV II is at the down load screen OPTIONSIDOWNLOAD A PROGILOAD TO SLOT x where x is slot 1 2 3 or 4 See Section II 6 With the LOAD TO SLOT x screen displayed choose a storage slot using the DV II arrow keys then press the ENTER AUTO RANGE key on the viscometer If after 5 seconds the viscometer cannot communicate with the DV Loader program the B E V LS ERROR NO PC ATTACHED message is displayed and a beeping sound is heard If a connection is established the Down Load button on the PC software becomes enabled and the DV II screen displays DOWNLOAD PROG TO STORAGE SLOT 1 Click on this button to down load the displayed program to the DV II When the down load is complete the DV II displays DOWNLOAD DONE TO EXIT PRESS A KEY At this point the program in the DV II can be printed and or run from the viscometer Click on this button to exit the DVLOADER software Note This is an important final step because it allows the RS232 port to be
48. ing the spindle to the left The face of the spindle nut and the matching surface on the lower shaft should be smooth and clean to prevent eccentric rotation of the spindle Spindles can be identified by the number on the side of the spindle coupling nut The must have a Spindle Entry Code number to calculate Viscosity Shear Rate and Shear Stress values The D V II memory contains parameters for all standard Brookfield spindles including custom spindles and the two digit entry code for each spindle the complete list of entry codes may be found in Appendix D Note The DV Il will remember the Spindle Entry Code which was in use when the power was turned off Pressing the SELECT SPINDLE key will display the current selected spindle code instead of temperature and cause the character S to begin to blink It will blink for about three seconds If the UP or DOWN ARROW keys are pressed while S is blinking the two character spindle value to the right oftheS character will begin to change in either an increasing or decreasing direction depending upon which ARROW key is pressed for each press of the key If the ARROW key is pressed and held the display will scroll through the spindle codes for as long as the ARROW key is depressed When it reaches the last item in the list either at the top or bottom of the list the spindle code displayed will roll over to either the first or last spindle code and the scroll action will continue
49. is rotating at 60 rpm The full scale range is 100 0 cP or 100 0 mPa s Figure I4 If the RPM is 0 0 the maximum viscosity displayed will be 0 0 cP or 0 0 5 While the Viscometer is the Auto Range mode data sent to attached printer or computer reflects the displayed values i e Auto Range values This function is only available when in the default screen Brookfield Engineering Labs Inc Manual No M 97 164 D1000 II 6 Out of Range The DV II givesindications for out of range operation When Torque readings exceed 100 over range the display changes to that shown in Figure 15 EEEE will also appear in the display for and viscosity or shear stress Figure I5 You must change either speed or spindle to correct this condition If you operate at spindle speeds that produce Torque below 10 0 the DV II flashes the Torque cP Viscosity SS Shear Stress and SR Shear Rate as shown in Figure 16 Figure 16 Negative Torque will be displayed as shown in Figure 17 Figure 17 Figure 18 is an example of the printed output of each of the above conditions Normal Operation 50 M RV 5 29 51 4 cP 10280 D CM2 1285 1 5 12 3 20 1 Z00 30 Over Range Operation gt 100 torque see Fig 15 RPM SQ M RV 5 29 gt 1 5 12 3 20 1 700 30 Under Range Operation lt 10 torque see Fig 16 50
50. l clock that keeps time between each printed data line this time is displayed as the last parameter on each printed line This provides a consistent time base for the collected data Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Command Code WTI Time MM SS WPT Torque value WTP Temperature value CC WKY 16 character or less text message SSN Speed value RPM SPI Time MM SS SSP Two digit spindle code STZ N A PDN N A PLN 16 character or less text message IV 2 Description of B E V I S Commands Required Parameter Command Description The program waits at this step until the specified time elapses The program waits at this step until the current torque equals the specifed value The program waits at this step until the current temperature equals the specified value The specified message is displayed on the top line of the DV display while PRESS A KEY is displayed on the bottom line of DV II 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 p
51. libration Procedure for Spiral Adapter 1 Place the viscosity standard fluid in the proper container into the water bath 2 Attach the spindle to the viscometer Attach chamber SA 1Y and clamp to the viscometer 3 Lower the DV II into measurement position Operate the viscometer at 50 or 60 RPM until the chamber is fully flooded Brookfield Engineering Labs Inc Page 54 Manual No M 97 164 D1000 4 The viscosity standard fluid together with the spindle should be immersed in the bath for a minimum of l hour stirring the fluid periodically operate at 50 or 60 RPM 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 viscometer reading Note The spindle must rotate at least five 5 times for one minute whichever is greater before readings are taken 7 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 Follow the above procedures for mechanically adjusting the setting of the cone spindle to the plate 2 Refer to Appendix A Table Al and determine the correct sample volum
52. llel port please note that if a printer is not attached to the viscometer the following screen appears Figure 22 1 9 Making Viscosity Measurements The following general procedure is used for making viscosity measurements Brookfield recom mends the use of a 600 ml Low Form Griffin beaker when using LV R V HA HB spindles 1 Mount the guardleg on the Viscometer LV and RV series 2 Insert and center spindle in the test material until the fluid s level is at the immersion groove on the spindle s shaft With a disc type spindle it is necessary to tilt the spindle slightly while immersing to avoid trapping air bubbles on its surface Attach the spindle to the lower shaft of the viscometer Lift the shaft slightly holding it firmly with one hand while screwing the spindle on with the other note left hand thread Avoid putting side thrust on the shaft Verify the proper spindle immersion depth and that the viscometer is level 3 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 range is inversely proportional to the rotational speed To measure high viscosity choose a small spindle and or a slow speed If the chosen spindle speed
53. lure 6 Turn the power switch to the ON position and allow to warm up for 10 minutes before performing autozero 7 For Cone Plate models refer to Appendix A 8 Ifappropriate connect interconnecting cable to serial port for connection of DV II to PC or printer 9 If appropriate connect interconnecting cable to parallel port for connection of D V II to printer 10 If appropriate connect interconnecting cable to analog serial port for connection of DV to chart recorder Brookfield Engineering Labs Inc Manual No M 97 164 D1000 I 5 Key Functions Figure 1 shows the control keys on the face of the DV II Viscometer The following describes the function of each key SET SPEED Y SELECT DISPLAY a gt SELECT SPINDLE S 2 PRINT NI M J UP ARROW This key is used to scroll UP in an increasing value direction through the available speed as SELECT spindle and Option menu tables SPEED 4p SPINDLE DOWN ARROW This key is used to scroll DOWN in a decreas SELECT ing value direction through the available speed DISPLAY PRINT spindle and option menu tables MOTOR ON OFF ESCAPE Figure 1 Turns the motor ON or OFF ESCAPE exits the Options menu SET SPEED Causes the DV II to begin running at the currently selected speed This function works only when the motor is ON Also used to select custom speeds when in t
54. meter Viscosity cP Shear Rate Cone Spindle LVDV II RVDV II HADV II HBDV II sec 1 65 400 13 1 261 000 245 600 491 982 400 128 000 25 6 512 000 1 024 000 205 4 096 000 11966 000 393 7 364 000 Viscosity cP T Bar Spindle LVDV II RVDV II HADV II HBDV II 156 187 460 2 000 2 000 000 4 000 4 000 000 16 000 16 000 000 312 374 920 4 000 4 000 000 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 4 686 500 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 II Viscometer there two considerations which pertain to the low viscosity limit of effective measurement 1 Viscosity measurements should be accepted within the equivalent Torque Range from 10 to 100 for any combination of spindle speed rotation 2 Viscosity measurements should be taken under laminar flow conditions not under turbulent flow conditions The first consideration has to do with the precision of the instrument Viscometers have a full scale range precision of 1 of any spindle speed rotation We discourage taking readings below 10 of range because the potential viscosity error of 1 1
55. n in the Custom Speed option the Time to Torque and Time to Stop options the Download A Program and Run A Program options It will be continued when any other option is selected 2 If the motor is ON when the user enters the Options menu choices will be limited to CGS SI units under SETUP F C units under SETUP PRINTING SELEC TIONS and PC PROG 3 The last selected menu option will be flashing Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Selecting an Option The following is a quick reference for entering and using the OPTIONS menu Press enter Options Menu Press A or To scroll to a specific option For Options Press To toggle between the choices available for a specific option when indicated gg P p Press To select the flashing option AUTO RANGE 7 IIL2 Setup From the main Options screen the user scrolls up or down until the following screen is displayed Figure 24 A press of the ENTER AUTORANGE key takes you into the Setup sub menu Figure 25 As in the main Options menu you can scroll up or down through the various Setup options In order to access all options the motor must be turned off Brookfield Engineering Labs Inc Manual No M 97 164 D1000 OPTIONS y Figure 25 1 2 1 Temperature Display The DV II viscometer can display temperature in either degrees Centigrade or degrees Fa
56. n the guard leg High Temperature Standard Fluids Viscosity cP Three Viscosity Temperatures 5 000 HT 30 000 12 500 HT 60 000 30 000 HT 100 000 60 000 25 C 93 3 C 149 C Refer to Brookfield catalog for more information 100 000 Table E1 MINERAL OIL VISCOSITY STANDARD FLUIDS Viscosity cP 25 C BEL Part No 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 Table E2 Manual No M 97 164 D1000 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 duplicate copies of the Certificate of Calibration for any fluid within two years of the purchase date Brookfield Viscosity Standard Fluids are reusable provided they a
57. ng 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 II 673 7 0 0673 RVDV II 7 187 0 0 7187 HADV II 14 374 0 1 4374 HBDV II 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 Appendix 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 or milliPascal seconds shown as mPaes on DV II Viscometer display 2 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 5 Torque appears in units of dyne centimeters or Newton meters shown as percent in both cases on the DV II Viscometer display ps Note To change CGS to SI units on the display see Section III 2 2 The equivalent units of measurementin the SI system are calculated using the following conversions SI CGS Viscosity 1 mPaes Shear Stress 1 Newton m 10 dyne cm Torque 1 Newton m 10 dyne cm References to viscosity throughout this manual are done in CGS units The DV II Viscometer provides equivalent information in SI units Brookfield Engineering Labs Inc Manual No M 97
58. nt 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 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 The calibration of the Brookfield Viscometer Rheometer is determined using a 600 ml Low Form Griffin Beaker The calibration of LV and RV series instruments includes the guard leg The beaker wall for HA HB instruments or the guard leg for LV RV instruments define what is called the outer boundary of the measurement The spindle factors for the LV RV and HA HB spindles were developed with the above boundary conditions The spindle factors are used to convert the instrument torque expressed as the dial reading or Torque value into centipoise Theoretically if measurements are made with different boundary conditions e g without the guard leg or ina 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
59. nts from Appendix D Tables D1 and D2 RPM 30 from the example statement TK 0 09373 from Appendix D for an LV Viscometer SMC 32 0from Appendix D for a type SC4 31 spindle SRC 0 34 from Appendix D for a type SC4 31 spindle Torque 62 3 from the example statement Applying this data to the above equations yields Viscosity cP 100 TK SMC Torque RPM 100 0 09373 32 0 62 3 30 622 9 cP Shear Rate 1 RPM SRC 30 0 34 10 2 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Shear Stress Dynes a 2 TK SMC SRC Torque 0 09373 32 0 0 34 62 3 63 5 112 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 DV II Serial and Analog Outputs No Connection Analog Ground No Connection Analog Torque Transmit Data TxD Note 2 Analog Temperature High Speed Print Note 3 Note 1 High Speed Print Serial Ground Note 1 Figure Notes 1 Placing a jumper across pins 4 9 causes the DV II to output printer data at a 3 line per second rate No jumper across pins 4 and 9 retains the once per second printer output rate 2 This is a 0 1 volt d c output where 0 volts corresponds to 0 torque and 1 volt corresponds to 100 torque with a resolution of 1 millivolt 0 1 3 This is a 0 4 volt d c output where 0 volts corresponds to 100 C and 4 volts corresponds to 300 C with a resolution of 1 millivol
60. o M 97 164 D1000 1 3 1 Time to Stop On entry the user is presented with the following screen display Figure 37 Note If atime interval has already been set the user may skip the time interval input and go directly to the speed input screen Figure 39 by pressing the ENTER AUTORANGE key Using the UP and DOWN ARROW keys the user enters a value for the minutes portion of the time ramp This value can be as high as 59 minutes When satisfied the user presses the OPTIONS TAB key again to enter the seconds setting display Figure 38 Using the UP and DOWN ARROW keys the user enters a value for the seconds portion of the time ramp This value will be from zero 0 up to fifty nine 59 seconds Press ENTER to accept the value The value for either minutes or seconds must be other than zero or you cannot advance to the RPM input screen Figure 39 Pressing the OPTIONS TAB or ENTER AUTORANGE keys will cause the user to alternate between the minutes input screen Figure 37 and the seconds input screen Figure 38 until either minutes or seconds are anything but zero A press of the the ENTER AUTORANGE key allows the user to input the RPM selection At this point the user will see a screen similar to Figure 39 using the UP and DOWN ARROW keys the user sets the speed Figure 39 After selecting the speed the user may review the values selected Ifthe user presses the OPTIONS TAB key you will return to the min
61. oped for those specific conditions Brookfield has outlined a method for recalibrating a Brookfield Viscometer Rheometer to any measure ment circumstance in More Solutions to Sticky Problems Section 3 3 10 Itis important to note that for Brookfield Engineering Labs Inc Manual No M 97 164 D1000 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 modifications to the recommended method of operation to suit their needs Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Appendix F Speed Sets The following speed sets and custom speeds are selectable from the SETUP menu option All speeds are in units of RPM Sequential Custom From 100 0 105 0 120 0 135 0 140 0 150 0 160 0 180 0 200 0 N N OIO OO OI N O The DV II has the The DV II can be programmed to sequential speed set selec
62. ow is illuminated turn the micrometer adjustment ring clock wise as you look down on the instrument until the light is just breaking contact 1 flickering see Figure 5 Moves Away clockwise LEFT 3 If the yellow contact light is not illuminated slowly turn the micrometer adjustment ring in small increments one or two scale divisions counter clockwise Continue moving the micrometer adjustment Figure A5 ring slowly counter clockwise until the con tact light yellow turns on Back off rotate clockwise until the light is just breaking contact i e flickering 4 Adjust the sliding reference marker right or left to the closest full scale division mark see Figure A6 5 Turn the micrometer adjustment ring one scale division to the left to meet the line on g Sliding the sliding reference marker THE YEL Marker LOW CONTACT LIGHT SHOULD GO OFF 6 You have established the gap space needed Division Marks for measurement Now turn the toggle switch Figure A6 OFF left the red pilot light should 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 Labs Inc Manual No M 97 164 D1000 A 4 VERIFYING CALIBRATION
63. press the ENTER AUTORANGE key to select the flashing option Figure 31 The speeds available in each of the above options are listed in Appendix F The DV II is initially set up with the Sequential Speed Set at Brookfield prior to shipment IIL2 3 1 LV RV Speeds In the case of Sequential or Interleave a press of the ENTER AUTORANGE key immediately selects that option and exits the SETUP option menu Brookfield Engineering Labs Inc Manual No M 97 164 D1000 2 3 2 Custom Speeds Pressing the ENTER AUTORANGE key when Custom Speeds is displayed results in the follow ing screen display Figure 32 Fifty four 54 speeds are available for custom speed set selection see Appendix F You are allowed to select up to nineteen 19 of these 54 available speeds Speed 0 0 is automatically included as one of the nineteen 19 speeds Selecting a speed or deleting a speed is accomplished by pressing the SET SPEED key while the desired speed is blinking This will cause an asterisk to appear or to disappear if the speed is being cleared to the left of the speed Trying to select more than nineteen 19 speeds will result in a beep for each press of the SET SPEED key when over this limit You may scroll up or down through the speed set in selecting speeds When done a press of the ENTER AUTORANGE key will take you back to the default screen with the asterisked speeds now comprising the custom speed set Regardless of order
64. ranty Brookfield Viscometers are guaranteed for one year from date of purchase against defects in materials and workmanship They are certified against primary viscosity standards traceable to the National Institute of Standards and Technology NIST The Viscometer must be returned to Brookfield Engineering Laboratories Inc or the Brookfield dealer from whom it was purchased for no charge warranty service Transportation is at the purchaser s expense The Viscometer should be shipped in its carrying case together with all spindles originally provided with the instrument For repair or service in the BT 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 NIE consult Brookfield Engineering Laboratories Inc or the dealer from whom you purchased the instrument For repair or service in the BS img era mnl 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 return to Brookfield Engineering Laboratories Vertriebs GmbH Barbarossastrasse 3 D 73547 Lorch Germany Telephone 49 7172 927100 FAX 49 7172 927105 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Packaging Instructions to Return a
65. re 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 II into measurement position with guard leg if LV or RV series Viscometer is used 3 Attach the spindle to the Viscometer 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 Viscometer 4 The viscosity standard fluid together with the spindle should be immersed in the bath for a minimum of 1 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 Ifthe fluid is at test temperature 0 1 C ofthe specified temperature normally 25 C measure the viscosity and record the Viscometer 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 the fluid standard to within the combined accuracies of the Viscometer and the viscosity standard as discussed in the section entitled Interpretation of Calibration T
66. repeated indefinitely until the viscometer is shut off or the user selects a different number of readings to average The number of readings to be averaged will include zero 0 as an average so that this option may effectively be turned off without turning the viscometer off The data averaging will only be applied to the data displayed by the viscometer No data averaging will be applied to the torque analog output signal When data averaging is other than zero 0 or one 1 a flashing A will be displayed to the left of the Torque sign as shown below Figure 34 You must press the ENTER AUTORANGE key to select the flashing option II 3 Time Modes The Time Modes are provided to allow more flexibility by unattended operating of the viscometer during data gathering The last selected option i e Time to Torque or Time to Stop will be highlighted when scrolling to this option as shown in Figure 35 Figure 35 A press of the OPTIONS TAB key will toggle between the two available timed modes as shown in Figure 36 Figure 36 To enter the time for either of these options press the ENTER AUTORANGE key while the selected option is blinking Let s start with Time To Stop These two modes are immediately executed when input is complete They do not return to the default screen until running is complete They can be stopped at any time by a press of the MOTOR ON OFF ESCAPE key Brookfield Engineering Labs Inc Manual N
67. ress the SET SPEED key to immediately begin rotation at the new speed Pressing the MOTOR ON OFF ESCAPE key stops the Viscometer spindle rotation Pressing this key sets the DV II to 0 0 RPM and causes the screen display to change as shown in Figure 10 Figure 10 Pressing the MOTOR ON OFF ESCAPE key again immediately starts the D V II running at the last scrolled to speed If you had been running at 12 RPM pressed MOTOR ON OFF ESCAPE and then re started the DV II by pressing MOTOR ON OFF ESCAPE once again you would again be running at 12 RPM However if while the motor was off you had scrolled to a new speed of 0 5 RPM pressing the MOTOR ON OFF ESCAPE key would start the D V II running at 0 5 RPM Note During both spindle or speed selection and scrolling operations the DV II will continue to calculate and display Viscometer data as selected II 4 Display Selection Viscosity displayed in units of cP or mPaes Shear Stress and Shear Rate are displayed on the left side of the top line You may step through the three display options by pressing the SELECT DISPLAY key For example the D V II is currently displaying Viscosity as shown in Figure 11 Figure 11 If the viscosity value exceeds 99 999 scientific notation is used In Figure 11 the viscosity value is 123 400 cP The first press of the SELECT DISPLAY key would display Shear Stress SS in Dynes cm2 or Newtons m2 see Figure 12 Figure 12 If th
68. ressed The DV II begins rotating at the specified speed This can be any of 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 The DV II begins printing data to the selected printer serial or parallel as selected in the DV II menus at the rate specified MM SS is minutes seconds 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 D V II Sets the data print timer clock back to zero The D V II immediately prints a data string to the selected printer serial or parallel as selected in the DV II menus The DV II prints the specified message to the selected printer serial or parallel as selected in the DV II menus 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 Programmable DV II Viscometer Manual No M 97 164 D1000 Brookfield Engineering Labs Inc IV 3 Creating a B E V I S Program Start the DVLOADER software by clicking on its associated icon or by using the FilelRun option of the Windows 3 1 Program Manager For Windows 95 click the Start button select Run enter the name of the program to execute dvloader exe then click OK The B E V L S command
69. 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 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 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 Allow time for the indicated reading to stabilize The time required for stabilization will depend on the speed at which the Viscometer is running and the characteristics of the sample fluid For maximum accuracy readings below 10 should be avoided 4 Press the MOTOR ON OFF ESCAPE key and turn the motor OFF when changing a spindle or changing samples Remove spindle before cleaning 5 Interpretation of results and the instrument s use with non Newtonian and thixotropic materials is discussed in the booklet More Solutions to Sticky Problems and in Appendix C Variables in Viscosity Measurements 11 10 Time Modes for Viscosity Measurement The Time Modes allow the viscometer user to implement the unattended Time to Stop and Time to Torque capabilities of the DV II Viscometer These features will allow the user to set up the viscometer i e select spindle and speed and then record readings for a fixed period of
70. s are displayed in a list box on the main screen This list box displays the commands available for creating programs Clicking on the Insert button inserts the highlighted command WTI as shown in Figure 66 into the selected line in the program grid Double clicking on a line in this list box also inserts the command into the grid shown in Figure 67 Wait for time interval Wait for torque The icons to the left of the command descriptions indicate the type of command Wait for temperature A command to walt for a condition Wait for a keypress Set viscometer speed command to set a program parameter Set spindle prog P Reset data timer Set print interval command send information attached printer Print data point now Print text now Figure 66 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Figure 67 shows the grid where the operator programs are created It is used to view and edit the B E V LS programs When the software starts an empty grid appears on the left of the screen You can choose up to 25 commands for your program Highlight each command in the list box to the right of this grid then click on the Insert button to insert that same command into the highlighted line of the grid This same insertion task can also be accomplished by double clicking on the appropriate command in the list box to the right Speeds In the case of a speed command SSN the
71. st fluid Variables related to the test fluid deal with the rheological properties of the fluid while instrument variables would include the Viscometer design and the spindle geometry system utilized Rheological Properties Fluids have different rheological characteristics that can be described by Viscometer measurements We can then work with these fluids to suit our lab or process conditions There are two categories of fluids These fluids have the same viscosity at different Shear Rates different RPMs and are called Newtonian over the Shear Rate range they are measured These fluids have different viscosities at different shear rates different RPMs 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 Viscometer spindle speed you get a different viscosity Time Independent A pseudoplastic material displays a decrease in viscosity with an increase in shear rate and is also known as shear thinning If you take Viscometer readings from a low to a high RPM and then back to the low RPM and the readings fall upon themselves the material is time independent pseudoplastic and shear thinning Time Dependent Thixotropic A thixotropic material has decreasing viscosity under constant shear rate If you set a Viscometer at a constant speed recording cP valu
72. t 0 1 C Analog Output The analog outputs for temperature and torque are accessed from the 9 pin connector located on the rear panel of the DV II The pin connections are shown in Figure Gl The output cable Part No DVP 96Y connections are Red Wire Temperature Output Black Wire Temperature Ground White Wire Torque Output Green Wire Torque Ground Note Please contact Brookfield Engineering Laboratories or your local dealer distributor for purchase of the DVP 96Y analog output cable Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Appendix H Laboratory Stands Model S Laboratory Stand Provided with instruments shipped after October 1 1999 VS 35Y MODEL S CLAMP ASSEMBLY VS 17SY BROOKFIELD MODEL S E LABORATORY CLAMP ASSEMBLY VISCOMETER EXPLOSION PROOF L ITEM PART DESCRIPTION QTY VS 34 14 UPRIGHT ROD 1 VS 38 18 UPRIGHT ROD OPTIONAL 2 VS 2 BASE 1 3 VS 3 LEVELING SCREW 4 50S311824S06B SCREW 5 16 18 X 3 4 LG SLOTTED PAN HD 5 502020032S34Z LOCKWASHER EXTERNAL TOOTH 5 16 X 5 8 X 1 32 6 T 8 2 1 1 VS 35 CLAMP 1 VS 40Y GEAR SCREW ASSEMBLY 1 VS 41Y CLAMP SCREW ASSEMBLY 1 9 vs 29 TENSION INSERT 1 10 vs 29w BELLEVILLE SPRING WASHER 2 11 VS 28 TENSION SCREW 1 12 5051032085258 SCREW 10 32 X 1 4 LG SLOTTED SET 1 13 VSXA 17Y CLAMP A
73. t 1 second intervals WPT Wait for torque wait for spindle to completely unwind to 0 torque Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Program 5 Variable speed Command Command Description Parameter Comments N Set viscometer speed 50 run at 50 RPM WTI 00 10 wait for 10 seconds PDN print one data point SSN run at 10 RPM WTI 00 10 wait for 10 seconds PDN print one data point SSN run at 20 RPM WTI wait for 10 seconds PDN print one data point SSN run at 50 RPM WTI wait for 10 seconds PDN print one data point Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Appendix A Cone Plate Viscometer Set Up This Cone Plate version of the DV II 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 D V II 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 Viscome
74. t up to 18 of the above speeds installed at for use at any one time Speed 0 0 is Brookfield prior to automatically included as the 19th shipment speed Brookfield Engineering Labs Inc Manual No M 97 164 D1000 Appendix G Communications When using the Brookfield Computer Cable Brookfield part DVP 80 the DV II will output a data string at a rate of approximately 3 times per second When using the Brookfield Printer Cable Brookfield Part No DVP 81 the output rate is 1 0 times per second The DV II uses the follow ing RS 232 parameters to output these strings Baud Rate 9600 Data Bits 8 Stop Bits 1 Parity None Handshake None The following formulas should be used to calculate and display the Viscometer data after each packet of data is obtained from the DV II Viscosity cP 100 SMC Torque RPM Shear Rate 1 RPM SRC Shear Stress Dynes a 2 TK SMC SRC Torque Where RPM Current Viscometer spindle speed in RPM TK Viscometer torque constant from Appendix D Table D2 SMC Current spindle multiplier constant from Appendix D Table D1 SRC Current spindle shear rate constant from Appendix D Table D1 Torque Current Viscometer torque expressed as a number between 0 and 100 As an example consider an LV Viscometer using an SC4 31 spindle running at 30 RPM and cur rently displaying a Torque of 62 3 First we list all of the given data and include model and spindle consta
75. temperature 3 The Viscometer has been sup plied with a special cone spindle s which con tains 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 II 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 A3 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 A4 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 Labs Inc Outlet Cup Bath Circulator CPE 44Y or CPE 44P Figure A2 Micrometer Adjustment Coupling Nut i These surfaces must be clean Y CPE Cone 1 d Figure A3 Do Not hit the CONE with the CUP Figure A4 Manual No M 97 164 D1000 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 Ifthe contact light yell
76. ter 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 Pilot Light Function is sensing enabled Toggle Swtich Contact Light CONTACT LIGHT is the yellow LED light yellow when it first turns on the hit point has been Sliding Reference found Micrometer Adjustment Ring SLIDING REFERENCE MARKER is used after finding the hit point it is the reference for establishing the 0 0005 inch gap Figure 1 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 Labs Inc Manual No M 97 164 D1000 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 A2 shows a typical water bath setup Connect the sample cup inlet outlet ports to the water bath inlet and outlet and set the bath to the desired test temperature Allow sufficient time for the bath to reach the test
77. the screen of Figure 35 Finally pressing the ENTER AUTORANGE key will cause the DV II to accept and store in EEPROM the new values only for the torque level and the selected motor speed That done the user is presented with the following screen Figure 46 At this point the user must press the ENTER AUTORANGE key to begin the timed stop operation Any other key press will be ignored except the MOTOR ON OFF ESCAPE key which will cancel the process and take the user back to the screen of Figure 44 where you will have to begin all over again We will assume that the user pressed the ENTER AUTORANGE key You will now be presented with Brookfield Engineering Labs Inc Manual No M 97 164 D1000 a screen similar to Figure 47 for the duration of the timed torque run Figure 47 Note When this mode has begun a press ofthe MOTOR ON OFF ESCAPE key will cancel the time to torque sequence and return the user to the screen of Figure 35 The seconds display will increment from zero 0 to fifty nine 59 in one 1 second intervals and the current value ofthe viscometer torque willbe updated continuously When secondsreaches fifty nine 59 the minutes value will increment by one 1 minute This will continue until the user selected torque value is attained at which point the viscometer will display the following screen Figure 48 At this point the viscometer will stop the motor and continue to display this screen until any
78. the spindle and turn the motor OFF select display to torque mode y Gently push up on the viscometer coupling V Turn the coupling until the digital display reads 10 15 on the display 7 Gently let go of the coupling V Watch the digital display you should see a run of numbers next to the the run of numbers should ultimately stop at 0 0 0 1 If the digital display does not return to ZERO the unit is in need of service see Appendix K How to Return Your Viscometer Brookfield Engineering Labs Inc Manual No M 97 164 D1000 1 Inaccurate Readings V Verify spindle speed and model selection V If readings are under range less than 10 the display will flash change spindle and or speed V on the digital display means the unit is over range greater than 100 reduce speed and or change spindle V Verify test parameters temperature container volume method Refer to More Solutions to Sticky Problems Section III e DV II Programmable Viscometer Operating Instructions Appendix C Variables in Viscosity Measurements V Perform a calibration check follow the instructions in Appendix E V Verify tolerances are calculated correctly V Verify the calibration check procedures were followed exactly If the unit is found to be out of tolerance the unit may be in need of service See Appendix K for details on How to Return Your Viscometer Viscometer Will Not R
79. time Time to Stop or until a set torque value is attained Time to Torque When timing begins a message will be displayed showing time remaining or time elapsed and the appropriate display item viscosity or torque will be updated continuously during the event Upon completion the viscometer will stop and display a screen stating that the test is complete and will also display the final recorded value for the viscosity in the first case or the time in minutes and seconds to reach the torque limit in the second case Pressing the UP or DOWN ARROW keys will allow additional viscometer data to be examined Pressing any other key except the PRINT or ENTER AUTORANGE key will bring the user back to the default normal viscometer display with the motor OFF Refer to the Time Modes in Section III 3 Brookfield Engineering Labs Inc Manual No M 97 164 D1000 II OPTIONS 11 1 Introduction to OPTIONS 14 OPTIONS TAB key provides access to the configuration Setup of DV II Viscometer as well as special functions that can enhance the user s ability to make viscosity measurements The Options menu shown in Table 1 gives a complete picture of the various configuration choices and special functions Quick References to Options Table 2 Options Menu SETUP Temperature F or C Units CGS or SI Speed Sets Sequential Interleave Custom Printer Port Serial RS232 or Parallel Data Averaging Display Onl
80. ts Data may be printed in two ways 1 Pressing the PRINT key once for less than three 3 seconds will result in the printing of one standard print line 2 If the PRINT key is pressed and held for more than three 3 seconds the DV II will then begin continuous printer output ata print rate interval selected via the Options menu see Section 4 The display will show a flashing P in front of the sign See Figure 20 Figure 20 To stop continuous printing press the PRINT key for one 1 second The flashing P will disappear on the viscometer display Figure 21 is an example of the print strings for CGS and SI units Brookfield Engineering Labs Inc Manual No M 97 164 D1000 For the case of CGS units with non exponential results 1 50 60 70 80 RPM XXX S XX XXX X D CM2 XXXXX 1 SEC XXXXX T XX XC ZXX XX and CGS units with exponential results 1 10 20 30 40 50 60 70 80 RPM XXX S XX XXX X cP XXXeX D CM2 XXXeX 1 SEC XXXXX T XX XC ZXX XX Similarly for SI units with non exponential results 1 10 20 30 40 50 60 70 80 RPM XXX S XX XXX X N M2 XXXXX 1 SEC XXXXX 7 and SI units with exponential results 1 10 20 30 40 50 60 70 80 iM MT Lo RPM XXX M XXXXX S XX XXX X mPas XXXeX N M2 XXXeX 1 SEC XXXXX ZXX XX Torque Temperature Z Time Figure 21 When printing via the para
81. used for output from the DV II to a serial printer or PC Brookfield Engineering Labs Inc Manual No M 97 164 D1000 IV 5 Example Programs The following example programs can also be found on the DVLoader disk that was included with the DV II Programmable Viscometer Program 1 Pre shear Parameter reshearing now Collecting data i begin printing data at 10 second intervals WTI Wait for time interval 01 40 wait at this step for 1 minute and 40 seconds effectively printing 10 data lines run at 10 RPM Program 2 For use with an external temperature controller Command Description Parameter Wait for temperature 40 0 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 WTP SSN 25 run at 25 RPM SPI SSN Set print Interval 00 30 begin printing data at 30 second intervals WTI Wait for time interval 06 00 walt at this step for 6 minutes effectively printing 12 data lines Program 3 Wait for cure time to torque measurement Parameter Set spindle 1 set to a number 3 spindle 00 0 run at 100 RPM SPI Set print interval 00 05 begin printing data at 5 second intervals Walt for torque 85 0 wait until torque 85 a curing cycle Program 4 Spring relax Command Description 100 torque is reached 0 0 0 0 c SPI Set print interval 00 01 begin printing data a
82. utes input screen of Figure 37 where you may change the minute input if so desired Thereafter continued pressing of the OPTIONS TAB key will toggle between the minutes and seconds input screens and the motor input screen A press of the MOTOR ON OFF ESCAPE key will cancel the timed stop operation and take the user back to the screen of Figure 36 Pressing the ENTER AUTORANGE key will cause the DV II to accept the new values Brookfield Engineering Labs Inc Manual No M 97 164 D1000 That done the user is presented with the following screen Figure 40 Atthis point the user must press the ENTER AUTORANGE key to begin the timed stop operation Any other key press will be ignored except the MOTOR ON OFF ESCAPE key which will cancel the process and take the user back to the screen of Figure 36 where you will have to begin all over again We will assume that the user pressed the ENTER AUTORANGE key You will now be presented with the following screen for the duration of the timed run Figure 41 When this mode has begun a press of the MOTOR ON OFF ESCAPE key will cancel the Timed Stop sequence and return the user to the screen of Figure 36 Also note that data will be displayed in the currently selected method i e CGS orSlunits Pressing the SELECT DISPLAY key allows display of alternate data values such as Shear Stress Shear Rate or Torque The seconds display will decrement from fifty nine 59 to zero 0 in one 1 second
83. 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 or der to reduce the potential prob lems when measuring high vis cosity materials HA HB spindles 3 through 7 are iden tical to those spindle numbers in the RV spindle set The HA HB 1 amp 2 have slightly different dimensions than the correspond ing RV spindles This dimen sional difference allows the fac tors between the RV and HA RV Guardleg LV Guardleg HB 1 amp 2 spindles to follow the same ratios as the instrument torque even though the bound ary conditions are different The recommended procedures of using a 600 ml beaker and the guard leg are difficult for some customers to follow The guard leg is one more item to clean In some applications the 500 ml of test fluid required to immerse the spindles in a 600 ml beaker is not available In practice a smaller vessel may be used and the guard leg is removed The Brookfield Viscometer Rheometer will produce an accurate 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 devel
84. y TIME TO STOP TIME TO TORQUE SET PRINT TIME Set the Printing Time PC PROG ON OFF Enables Disables Communication of Serial RS232 Port DOWNLOAD A PROGRAM Link to PC to Receive a B E V I S Program B E V LS Brookfield Engineering Viscometer Instruction Set RUN A PROGRAM Execute a B E V LS Program Not available when motor is ON Pressing OPTIONS TAB places you into the Options menu at the last option selected The following keys are active and perform as follows 4p UP ARROW Scrolls up through menu or selects new value from list 4 DOWN ARROW Scrolls down through menu or selects new value from list Brookfield Engineering Labs Inc Manual No M 97 164 D1000 OPTIONS TAB Toggles between options om ENTER AUTORANGE Accepts the currently flashing option and moves user to next level Gf applicable of the selected option MOTOR ON OFF ESCAPE Cancels current operation and backs user out one menu level Repeated pressing will back the user out to the default screen While in the Options menu the MOTOR ON OFF ESCAPE key does not cause the viscometer motor to turn on or off The Options menu screens will appear as shown in Figure 23 if you cycle through the possible options using the UP DOWN arrows Figure 23 Onentry to the Options menu the following rules regarding current viscometer operation are in force 1 Printer output will be suppressed whe

BROOKFIELD DV-II+ PROGRAMMABLE VISCOMETER Operating

Contents

Download Pdf Manuals

Related Search

Related Contents