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Brookfield Engineering Laboratories, Inc.

Page 120

Manual No. M98-211-E0912

APPENDIX F - The Brookfield Guardleg

The guard leg was originally designed to protect the spindle during use. The first applications of the

Brookfield Viscometer included hand held operation while measuring fluids in a 55-gallon drum. It is

clear that under those conditions the potential for damage to the spindle was great. Original construction

included a sleeve that protected the spindle from side impact. Early RV guard legs attached to the dial

housing and LV guard legs attached to the bottom of the pivot cup with a twist and lock mechanism.

The current guard leg is a band of metal in the shape of the letter U with a bracket at the top that attaches

to the pivot cup of a Brookfield Viscometer/Rheometer. Because it must attach to the pivot cup, the

guard leg cannot be used with a Cone/Plate instrument. A guard leg is supplied with all LV and RV

series instruments, but not with the HA or HB series. It’s shape (shown in Figure F-1) is designed to

accommodate the spindles of the appropriate spindle set; therefore, the RV guard leg is wider than the

LV due to the large diameter of the RV #1 spindle. They are not interchangeable.

The calibration of the Brookfield Viscometer/Rheometer is determined using a 600 ml Low Form Griffin

Beaker. The calibration of LV and RV series instruments includes the guard leg. The beaker wall (for

HA/HB instruments) or the guard leg (for LV/RV instruments) define what is called the “outer boundary”

of the measurement. The spindle factors for the LV, RV, and HA/HB spindles were developed with the

above boundary conditions. The spindle factors are used to convert the instrument torque (expressed

as the dial reading or %Torque value) into centipoise. Theoretically, if measurements are made with

different boundary conditions, e.g., without the guard leg or in a container other than 600 ml beaker,

then the spindle factors found on the Factor Finder cannot be used to accurately calculate an absolute

viscosity. Changing the boundary conditions does not change the viscosity of the fluid, but it does change

how the instrument torque is converted to centipoise. Without changing the spindle factor to suit the

new boundary conditions, the calculation from instrument torque to viscosity will be incorrect.

Practically speaking, the guard leg has the greatest effect when used with the #1 & #2 spindles of the LV

and RV spindle sets (Note: RV/HA/HB #1 spindle is not included in standard spindle set). Any other

LV (#3 & #4) or RV (#3 - #7) spindle can be used in a 600 ml beaker with or without the guard leg to

produce correct results. The HA and HB series Viscometers/Rheometers are not supplied with guard

legs in order to reduce the potential problems when measuring high viscosity materials. HA/HB spindles

#3 through #7 are identical to those spindle numbers in the RV spindle set. The HA/HB #1 & #2 have

slightly different dimensions than the corresponding RV spindles. This dimensional difference allows

the factors between the RV and HA/HB #1&#2 spindles to follow the same ratios as the instrument

torque even though the boundary conditions are different.

The recommended procedures of using a 600 ml beaker and the guard leg are difficult for some customers

to follow. The guard leg is one more item to clean. In some applications the 500 ml of test fluid

required to immerse the spindles in a 600 ml beaker is not available. In practice, a smaller vessel may

be used and the guard leg is removed. The Brookfield Viscometer/Rheometer will produce an accurate

and repeatable torque reading under any measurement circumstance. However, the conversion of this

torque reading to centipoise will only be correct if the factor used was developed for those specific

conditions. Brookfield has outlined a method for recalibrating a Brookfield Viscometer/Rheometer

to any measurement circumstance in More Solutions to Sticky Problems. It is important to note that

for many viscometer users the true viscosity is not as important as a repeatable day to day value. This

repeatable value can be obtained without any special effort for any measurement circumstance. But, it

Содержание DV-III ULTRA

Страница 1: ...ons Manual No M98 211 E0912 SPECIALISTS IN THE MEASUREMENT AND CONTROL OFVISCOSITY TEL 508 946 6200 FAX 508 946 6262 or 800 628 8139 USA excluding MA INTERNET http www brookfieldengineering com BROOKF...

Страница 2: ...Brookfield Engineering Laboratories Inc Page 2 Manual No M 98 211 B0104 Brookfield Engineering Laboratories Inc Page 2 Manual No M98 211 E0912...

Страница 3: ...ty and Yeild Measurements 27 III 1 Quick Start 27 III 2 Preparations for Making Measurements 28 III 3 Selecting a Spindle Speed 30 III 4 Multiple Data Points 30 IV Programming the DV III Ultra and Dat...

Страница 4: ...Set Up 77 V 2 Print 77 V 3 Alarm 78 V 4 Set Temperature 79 V 5 Data 79 V 6 Timed Data Collection 81 Appendix A Cone Plate Rheometer Set Up 83 A 1 Electronic Gap Setting Features 83 A 2 Set Up 84 A 3...

Страница 5: ...IIIUltracanalsomeasureyieldstress inPascalsorPa SeeSectionI 3formoreinformation on yield stress I 1 Torque Measurement There are four basic spring torque models offered by Brookfield Spring Torque Mo...

Страница 6: ...ing provides enough stress so that the paint flows easily and smoothly over a painted wall However a thin layer of applied paint if a good one that is allowed to rest undisturbedonthesurface regainsit...

Страница 7: ...versions a spindle wrench one cone spindle and sample cup Part No CPE 44Y replace the spindle set Power Cord for 115 VAC DVP 65 for 230 VAC DVP 66 RTD Temperature Probe DVP 94Y Ribbon Cable DVP 145 G...

Страница 8: ...Brookfield Engineering Laboratories Inc Page 8 Manual No M 98 211 B0104 Brookfield Engineering Laboratories Inc Page 8 Manual No M98 211 E0912 I 5 Dimensional Information...

Страница 9: ...01 to 0 99 RPM for viscosity tests 0 1 RPM increments from 1 0 to 250 RPM Speed Ranges Pre Shear 0 01 to 200 rpm for yield tests Zero 0 01 to 0 5 rpm Yield Test 0 01 to 5 rpm Time Intervals 100 msec...

Страница 10: ...hing the spindle it is not necessary to lift the coupling where the spindle connects to the instrument 3 The Oscillation Check explained in theAppendix J Fault Diagnosis and Troubleshooting does not p...

Страница 11: ...ronment In case of emergency turn off the instrument and then disconnect the electrical cord from the wall outlet The user should ensure that the substances placed under test do not release poisonous...

Страница 12: ...d clamp assembly should face the rear of the base see Figure I 4 The upright rod item 1 is held in place with the jam nut item 4 which is attached from the bottom of the base Tighten this nut with a s...

Страница 13: ...onnector on the DV III Ultra base see Figure I 6 5 Connect the RTD probe to the socket on the back side of the DV III Ultra Rheometer see Figure I 6 6 The Rheometer must be leveled before the instrume...

Страница 14: ...e Probe Connector Power ON OFF Switch AC Fuse s AC Power Connector Connector Connector Parallel Printer Ribbon Cable Connector USB Cable Ribbon Cable Connector RS 232 Serial Printer Computer Analog Ou...

Страница 15: ...e RS 232 serial port on the DV III Ultra base to Com Port 1 or Com Port 2 on the computer Both cables are supplied with the RHEOCALC software S PARALLEL PRINTER The CAP 86 cable is used to connect the...

Страница 16: ...TAB ENTER YES NO SELECT DISP PRINT 1 7 8 9 4 5 6 3 2 0 SELECT SPDL PROG RUN MOTOR ON OFF ESCAPE PROG AUTO RANGE Figure I 7 MOTOR ON OFF ESCAPE MOTOR ON OFF ESCAPE Turns the motor on or off Cancels any...

Страница 17: ...enu ENTER ENTER Functions as an ENTER key similar to a computer by serving to accept a keyboard entry I 13 Cleaning Make sure the instrument is in a decent working environment dust free moderate tempe...

Страница 18: ...V1 0 HA STANDALONE Figure II 1 No key press is necessary After a short pause the display will read REMOVE SPINDLE LEVEL RHEOMETER AND PRESS THE MOTOR ON OFF KEY TO AUTOZERO Before beginning the autoz...

Страница 19: ...ttached temperature probe If no probe is connected four dashes will be displayed 4 Printing Status Indicates the currently selected method of printing 5 Measured Data Instrument Torque Viscosity cP Sh...

Страница 20: ...ure T 99 9 T 300 0 10 3 Time Z XX XX 00 00 Z 99 59 05 32 Table II 1 S Out of Range Indicators The DV III Ultra is capable of measuring instrument torque within the range of 0 to 100 Based onthismeasur...

Страница 21: ...To enter a spindle number press the numeric keys until the desired spindle number has been entered Valid spindle numbers encompass the range from 00 to 99 as listed in Appendix D Mistakes are correct...

Страница 22: ...re II 12 The spindle number and name will be flashing Use the 2 key for scrolling downward and the 8 key for scrolling upward The spindle name can be changed to any 2 letters from A to Z Use the tab k...

Страница 23: ...fy the second spindle you will need to proceed through the third spindle parameters by pressing Enter until prompted to Save New Spindle This will then save the modified spindle II 4 Direct Speed Entr...

Страница 24: ...h RHEOCALC To configure the external control mode connect computer interface cable DVP 80 RS 232 or DVP 202 USB to the port on the DV III Ultra base before turning on the DV III Ultra With the DVP 80...

Страница 25: ...he way of normal activity Be sure that the unit is properly leveled for all measurements Section I 10 Step 6 Periodically check the Tension Screw on the Clamp Assembly of the Upright Rod Assembly Appe...

Страница 26: ...sample cups should be handled carefully to prevent scratches or nicks Do not use abrasive cleaners or cloths Store all spindles in the protective case in which they were supplied Do not store spindle...

Страница 27: ...I 4 G Record torque and viscosity Yield Measurement The DV III Ultra Rheometer uses the same methodology for yield measurement as the Brookfield YR 1 Rheometer If you have experience with the YR 1 thi...

Страница 28: ...designed to be used with a 600 ml low form Griffin beaker or equivalent container with a diameter of 8 25cm The same applies to the optional RV1 HA HB1 and Vane spindles Many other spindle systems ar...

Страница 29: ...les have a left handed thread The lower shaft should be secured and slightly lifted with one hand while screwing the spindle to the left The face of the spindle nut and the matching surface on the low...

Страница 30: ...for more detail When viscosity and or yield stress data must be compared be sure to use the same test methodology namely the same instrument spindle speed container temperature and test time III 4 Mu...

Страница 31: ...of time As an example we can instruct the DV III Ultra to rotate the spindle at 5 RPM for 30 seconds and then change speed to 10 RPM and wait 20 seconds with the following program Step 1 RPM 5 Time 00...

Страница 32: ...creation editing and execution of DV III programs are described in the following sections There are two types of test programs 1 Next Speed Set where the test speeds are programmed and the operator m...

Страница 33: ...NITE STEP TIMES PROG SPEED These programs when executed will automatically progress from step to step based on the time intervals programmed by the user On pressing the 3 key in Figure IV 3 the user i...

Страница 34: ...five 25 step program limit In either case the following screen will be displayed PROGRAM 3 COMPLETE 1 ENTER EDIT A PGM 2 CLEAR SPEED SET 3 USE SPEED SET Figure IV 6 To use the currently selected spee...

Страница 35: ...ished entering a program In either case the user is presented with REVIEW SPEED SET 3 STEP 01 OF 03 STEP RPM 10 0 STEP TIME 00 05 Figure IV 9 Operation in this mode is exactly the same as for entering...

Страница 36: ...can be retained in memory the user may eventually use all the available speed set slots The user may also have programmed speed sets that are no longer required and would like to remove Assume that th...

Страница 37: ...2 for use in the ensuing data gathering operations To initiate the use of this speed set with finite step times or with zero step times the user presses the PROG RUN key and is presented with a start...

Страница 38: ...be returned to the display of Figure IV 15 From Figure IV 15 the user runs the program by pressing the PROGRAM RUN key which signifies that the user is satisfied with his start and stop step values an...

Страница 39: ...d to SPDL and the two letter combo LK is being used to indicatethe LOCKOUT condition PleasenotethatwhileTORQUEispresentlybeingdisplayed there is nothing to prevent the user from pressing the SELECT DI...

Страница 40: ...e zero time interval mode is reflected in the message being displayedonlinethreeofthedisplaywherePROGhasreplacedENTERindicatingthattheprogram will be executed step by step without user intervention He...

Страница 41: ...e IV 26 below RPM 120 SPINDLE 31 TEMP 72 1 C PRTO SET 2 04 08 05 PROG TORQUE 72 8 Figure IV 26 If the speed set contained no time interval the selection of a subset of speeds would result in a screen...

Страница 42: ...tor to control the DV III Ultra through the variables of speed temperature and time while providing for independent data collection Programs can include up to 25 commands with a maximum data count of...

Страница 43: ...ng the time since the last data print is printed as soon as a key is pressed SSN Speed value The DV III Ultra begins rotating at the specified speed This can be any RPM of the speeds listed in the Spe...

Страница 44: ...he command into the highlightedlineofthegrid Thissameinsertiontaskcanalsobe accomplished by double clicking on the appropriate command in the list box to the right Beforebeingpermittedtoinsertanotherc...

Страница 45: ...ram grid Double clicking on a line in this list box also inserts the command into the grid The icons to the left of the command descriptions indicate the type of command A command to wait for a condit...

Страница 46: ...Parameter Comments PLN Print text now Preshearing now print user message SSN Set viscometer speed 50 0 run at 50 RPM WPT Wait for torque 90 0 wait until 90 torque is reached PLN Print text now Collect...

Страница 47: ...ue 0 0 wait for spindle to completely unwind to 0 torque Program 5 Variable speed Command Command Description Parameter Comments SSN Set viscometer speed 50 run at 50 RPM WTI Wait for time interval 00...

Страница 48: ...is presented with SELECT A PROGRAM AVAILABLE 56789 IN MEMORY 01234 CURRENT 3 Figure IV 33 The user is informed that the current or last used program is no 3 that programs 0 1 2 3 and 4 are available...

Страница 49: ...en shown next RPM 0 0 SPINDLE 31 TEMP 72 1 C PRTN BEVIS PROG RUNNING TORQUE 00 0 Figure IV 38 The user now sees viscosity data and can use the SELECT DISPLAY key to view other viscosity measurement pa...

Страница 50: ...se of viscosity measurement a non Newtonian fluid will produce a curve when test data is plotted on a shear stress vs shear rate graph The math model will force the data into a straight line and descr...

Страница 51: ...ular model will be displayed as follows CASSON STANDARD cP PLASTIC VISC 3069 YIELD STRESS 140 1 CONF OF FIT 97 5 Figure IV 42 This screen for the Standard CASSON Model is typical for all five 5 of the...

Страница 52: ...Viscosity cP or mPa s Yield Stress Dynes cm2 or N m2 Confidence of Fit The Standard Casson method is a direct implementation of the original Casson equation 2 NCA CMA Casson Chocolate ThisCassonmethod...

Страница 53: ...tency Index cP or mPa s Confidence of Fit 5 IPC Paste Analysis This method is intended to calculate the Shear Sensitivity Factor and the 10 RPM Viscosity value of pastes A prime example of its use is...

Страница 54: ...ws 2000 NT XP Vista and Windows 7 operating systems for flexible operation 32 bit operation for rapid performance Easy to use structured command language to make viscosity tests easier to program Disp...

Страница 55: ...Brookfield Engineering Laboratories Inc Page 55 Manual No M98 211 E0912 Figure IV 44 Test Screen Figure IV 45 Run Data Screen...

Страница 56: ...Brookfield Engineering Laboratories Inc Page 56 Manual No M 98 211 B0104 Brookfield Engineering Laboratories Inc Page 56 Manual No M98 211 E0912 Figure IV 46 Setup Screen Figure IV 47 Analysis Screen...

Страница 57: ...have linear shear stress vs shear rate behavior and n describes the degree of non Newtonian flow the flow index essentially indicates how non linear a material is Figure IV 48 When n 1 the product is...

Страница 58: ...d as a result it will appear to customers to be rich and creamy while still being easy to apply Shampoo Flow Index n 0 08 Consistency Index k 91071 cP IV 7 2 The Herschel Bulkley Model t shear stress...

Страница 59: ...Bingham fluid which is discussed next An Example of the Herschel Bulkley Model at Work A company uses a gel like substance as part of their production process Upon arrival theytestthematerialandapply...

Страница 60: ...ate flow It also provides the plastic viscosity h which is the viscosity after a product yields Figure IV 50 When should you use it This model should be used with non Newtonian materials that have a y...

Страница 61: ...use of the problem was identified Drilling Fluid Plastic Viscosity h 6621 cP Yield Stress t o 166 4 dynes cm2 IV 7 4 The Casson Model t t o hD t shear stress t o yield stress h plastic viscosity and D...

Страница 62: ...ull viscosity profile and apply the Casson model From the results shown in Figure VI 4 they learn that theirointmenthasahigheryieldstress t o and lower plastic viscosity h than they originally intende...

Страница 63: ...ts Brookfield s HA spring range viscometer with a Small Sample Adapter SC4 27 spindle and SC4 13R sample chamber as the approved apparatus The IPC Paste Model h kRn The IPC Paste Model was developed f...

Страница 64: ...Brookfield Engineering Laboratories Inc Page 64 Manual No M 98 211 B0104 Brookfield Engineering Laboratories Inc Page 64 Manual No M98 211 E0912 Figure IV 52 Figure IV 53...

Страница 65: ...PC the main screen for creating yield test programs is in Figure IV 54 Figure IV 54 Use this page to create load save and print test parameters that are then downloaded into one of the memory locatio...

Страница 66: ...endix A for more information regarding spindles for use with the DV III Ultra Rheometer Selection of the appropriate spindle code is important to ensure correct stress calculations Immersion Mark Each...

Страница 67: ...meters If the Wait Time box is checked on the Test Parameters page of the EZ Yield software there will be a time delay after zeroing before the actual test run begins During this delay the motor shaft...

Страница 68: ...by the EZ YieldTM software so the decrease in torque may be more easily visualized However this will also affect the calculated yield stress value Low and High Yield Limits These values in Pa can be u...

Страница 69: ...gel 2 DB chocolate syrup 2 DB hair gel 3 DB chocolate syrup 3 DB hair gel 4 DB chocolate syrup 4 DB petroleum jelly 1 DB ketchup 1 DB petroleum jelly 2 DB ketchup 2 DB Figure IV 58 The Save File dialo...

Страница 70: ...ys the first page of the report Previous Page Displays the previous page of the report Next Page Displays the next page of the report Last Page Displays the last page of the report Printer Setup Displ...

Страница 71: ...eived Data are plotted as received while being displayed in the Data Results section of the Data page If the rheometer is running the test and no data appears see Appendix J Troubleshooting to help de...

Страница 72: ...yed in the table Time Elapsed time since the beginning of the run cycle is shown here in units of hours minutes seconds and thousandths of seconds H MM SS SSS Data is taken at an interval equal to the...

Страница 73: ...ge condition 4 Test Failed due to a User Limit violation 5 Test Failed due to a user cancellation See Section IV 8 6 3 Test Results for more information regarding these possible results Temperature Th...

Страница 74: ...ime is displayed in seconds 2 Stress vs Apparent Strain This graph displays the calculated Stress values versus the calculated Apparent Strain values for each data point collected Stress is displayed...

Страница 75: ...e Torque vs Time graph It displays Stress andApparent Strain of the position pointed to by the cursor for the Stress vs Strain graph Calibration Data This is a two 2 state button Turning this option O...

Страница 76: ...to navigate to and select the desired data file to graph BEL gpk test DB syrup hair gel 1 DB chocolate syrup 1 DB syrup hair gel 2 DB chocolate syrup 2 DB hair gel 3 DB chocolate syrup 3 DB hair gel...

Страница 77: ...reported as 44 38 Pa Figure IV 63 Hair Gel Sample IV 8 5 2 Example Application Hand Cream Hand cream is typically packaged in a small jar The small V 73 spindle did not provide enough torque signal l...

Страница 78: ...a name brand ketchup was tested and compared to a store brand ketchup Visual examination of both products could distinguish no noticeable differences Both tests were run under exactly the same conditi...

Страница 79: ...Brookfield Engineering Laboratories Inc Page 79 Manual No M98 211 E0912 Figure IV 65 Figure IV 66 Ketchup Comparison Samples...

Страница 80: ...relatively low torque reading for the yield 10 then try using a faster speed or larger spindle to get a larger torque reading Alternatively a DV III Ultra Rheometer with a more sensitive spring could...

Страница 81: ...test programs Once a test program has been downloaded from your PC to the DV III Ultra you will be able to run tests by following the instructions in this section S Yield Programs Menu Yield test oper...

Страница 82: ...description of the pre test information sent to the printer The program number being run is recorded so that it will be the first program shown the next time the Yield Programs Menu see Figure IV 69 i...

Страница 83: ...test The field after the word Time is the time in seconds that counts down from the user defined wait time 5 Sample Tst S 71 WAITING TIME 0010 Figure IV 74 Figure IV 75 is always displayed during the...

Страница 84: ...IELD ERROR UNDER RANGE PRESS ESC OR ENTER Figure IV 80 Figure IV 81 is displayed when the yield test fails due to the resultant yield stress exceeding the user defined limits The actual yield stress m...

Страница 85: ...d Post Test Output At the conclusion of the test one of the following six 6 messages is sent to both the parallel and serial RS 232 ports 1 Test test number test name Complete Yield Stress Pa 196 53 T...

Страница 86: ...NOT READY ENSURE PRINTER IS ONLINE PRESS ANY KEY Figure IV 83 Pressing any key at this point returns the display to that of Figure IV 82 Pressing the ENTER key also records the program number being p...

Страница 87: ...owing is sent to an attached printer Test 5 Sample Tst Complete Test Failed Under range The following screen is displayed 5 Sample Tst S 71 YIELD ERROR UNDER RANGE PRESS ESC OR ENTER Figure IV 85 Unde...

Страница 88: ...tress Pa 196 53 Torque Yield 27 4 Temperature 250 5C Test Failed Yield Stress Below Low Limit High Limit Violation Test 5 Sample Tst Complete Yield Stress Pa 996 53 Torque Yield 78 6 Temperature 250 5...

Страница 89: ...ndication means that there is no communication with a controller Selecting this option will make the DV III Ultra try to establish communication When communication is established off will be change to...

Страница 90: ...ler uses the serial port 3 Enter the date and time to be shown on printed data tables Data is entered in the format of DD MM YY for date and HH MM for time 24 hour clock For example 2 30 pm on January...

Страница 91: ...ESCAPE key The MOTOR OFF is tripped after the torque reading goes above the motor off setting The DV III Ultra stops rotating and the instrument beeps Pressing any key turns off the beep V 4 Set Tempe...

Страница 92: ...N PRESS ONLINE A sample of printed output is shown in Figure V 4 Sample Name _____________________________________________________________ Operater Name ____________________________ Date 06 21 91 Time...

Страница 93: ...torque value at a single speed Torque and speed are input using the number keys and OPTIONS TAB key The test will begin immediately upon the press of the ENTER key The test will end when the specifie...

Страница 94: ...nd OPTIONS TAB key The test will begin immediately upon the press of the ENTER key Non averaged data will be displayed during the test The test will end when the specified time interval has elapsed Th...

Страница 95: ...eoperatingtemperaturerangeis0 Cto100 C Becarefulaboutcondensation and the possible formationof ice crystals when approaching 0 C Settingthe gap should be accomplished at the same temperature that you...

Страница 96: ...one or cup cannot be used with earlier DV III Ultra 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...

Страница 97: ...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 A 6 5...

Страница 98: ...for a given cone spindle speed combination Example LVDV III UltraViscometer Cone Spindle CPE 42 Brookfield Silicone Viscosity Standard having a viscosity of 9 7 cP at 25 C At 60 RPM the full scale vi...

Страница 99: ...01 937 10 000 20 000 80 000 HA2 02 3 750 40 000 80 000 320 000 HA3 03 9 375 100 000 200 000 800 000 HA4 04 18 750 200 000 400 000 1 600 000 HA5 05 37 500 400 000 800 000 3 200 000 HA6 06 93 750 1 000...

Страница 100: ...00 SC4 27 27 23 400 250 000 500 000 2 000 000 SC4 28 28 46 880 500 000 1 000 000 4 000 000 SC4 29 29 93 750 1 000 000 2 000 000 8 000 000 SC4 31 31 30 000 320 000 640 000 2 560 000 SC4 34 34 60 000 64...

Страница 101: ...dapter Spindle Shear Rate sec 1 Viscosity cP LVDV III Ultra RVDV III Ultra HADV III Ultra HBDV III Ultra 14 0 80 47 0 1 171 000 500 0 12 500 000 1 000 0 25 000 000 4 000 100 000 000 15 0 96 19 0 468 6...

Страница 102: ...0 1 024 25 600 000 34 0 56 24 0 600 000 256 0 6 400 000 512 0 12 800 000 2 048 51 200 000 81 0 258 1 4 10 000 15 0 10 000 30 0 10 000 120 10 000 UL Adapter UL Spindle Shear Rate sec 1 Viscosity cP LVD...

Страница 103: ...00 6 4 128 000 25 6 512 000 CP CPE CPA 51 0 768 2 4 47 990 25 6 512 000 51 2 1 024 000 205 0 4 096 000 CP CPE CPA 52 0 400 4 6 92 130 49 2 983 000 98 3 1 966 000 393 0 7 864 000 Theoretical low limit...

Страница 104: ...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 t...

Страница 105: ...different viscosity Time Independent Pseudoplastic A pseudoplastic material displays a decrease in viscosity with an increase in shear rate and is also known as shear thinning If you take Rheometer r...

Страница 106: ...ecify the following 1 Test temperature 2 Sample container size or spindle chamber geometry 3 Sample volume 4 Rheometer model 5 Spindle used if using LVDV III Ultra 1 4 or RVDV III Ultra 1 7 attach the...

Страница 107: ...The Spindle Multiplier Constant SMC used for viscosity calculations and the Shear Rate Constant SRC used for shear rate and shear stress calculations Note that where SRC 0 no shear rate shear stress...

Страница 108: ...0 0 28 SC4 29 29 100 0 25 SC4 31 31 32 0 34 SC4 34 34 64 0 28 SC4 37 37 25 0 36 CP CPE CPA 40 40 0 327 7 5 CP CPE CPA 41 41 1 228 2 CP CPE CPA 42 42 0 64 3 8 CP CPE CPA 51 51 5 178 3 84 CP CPE CPA 52...

Страница 109: ...0 5B The full scale viscosity range for any DV III Ultra model and spindle may be calculated using the equation Full Scale Viscosity Range cP TK SMC 10 000 ______ RPM Where TK DV III Ultra Torque Cons...

Страница 110: ...fluid b The new full scale viscosity range is calculated for a selected RPM R1 100 n Y Where R1 The new full scale viscosity range n The viscosity in cP of the Newtonian fluid Y The Torque reading at...

Страница 111: ...LE SPINDLE CODE YMC SMC VANE LENGTH INCHES CM VANE DIAMETER INCHES CM V 71 71 0 5 2 62 2 708 6 878 1 354 3 439 V 72 72 2 0 11 1 1 706 4 333 853 2 167 V 73 73 10 0 53 5 998 2 535 499 1 267 V 74 74 100...

Страница 112: ...V 71 5xHB 40 20 200 V 72 5xHB 40 80 800 V 73 5xHB 40 400 4000 Calculations for Shear Stress in Yield Test The following equations can be used to calculate the shear stress values after each packet of...

Страница 113: ...orque cal Spring windup angle revolutions cal Vcal x tcal 60000 Where cal Spring windup angle revolutions Vcal Calibration speed fixed at 0 1 rpm rpm tcal Calibration time milliseconds time for 0 to 1...

Страница 114: ...or the increase from 1 to 2 Small Sample Adapter Thermosel Ul Adapter DIN Adapter Spiral Adapter For more help you can go to the website www brookfieldengineering com and download the video The accura...

Страница 115: ...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...

Страница 116: ...ith 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...

Страница 117: ...ch the extension link coupling nut and free hanging spindle or directly attach the solid shaft spindle to the DV III Ultra d Allow 30 minutes for the viscosity standard sample chamber and spindle to r...

Страница 118: ...st 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 a...

Страница 119: ...onsult with Brookfield or an authorized dealer to determine which fluid is appropriate Interpretation of Calibration Test Results When verifying the calibration of the DV III Ultra the instrument and...

Страница 120: ...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...

Страница 121: ...if the boundary conditions are not those specified by Brookfield TheguardlegisapartofthecalibrationcheckoftheBrookfieldLVandRVseriesViscometer Rheometer Our customers should be aware of its existence...

Страница 122: ...WARD YOU DV III Ultra HEAD UNIT TENSION SCREW 2 1 3 4 5 Item Part Description Qty 1 VS CRA 14S 14 UPRIGHT ROD AND CLAMP ASSEMBLY 1 2 DVP 204BY STAND SUB ASSEMBLY DV III ULTRA 100 240Vac 1 3 502028071S...

Страница 123: ...the hole into which the RTD probe is inserted When inserting the RTD probe into the Probe Clip the upper part of the Clip is compressed by squeezing the points shown in Figure H 1 R TD Probe Hole Sque...

Страница 124: ...1 2 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 millivolt 0 1 C Data RxD Figure I 1 Analog Output The analog outputs for te...

Страница 125: ...nting the torque zero offset as 4 hex digits Calculate the decimal equivalent of the zero offset as follows Zero offset tval 100 Where tval is the decimal equivalent of the received zero offset packet...

Страница 126: ...d x x x x x x 1 x Control circuitry enabled x x x x x x x 1 Table I 3 Status Byte ss Definition Note These values are not updated in the status byte when the listed condition occurs They are made avai...

Страница 127: ...eed The DV III Ultra responds to this command by repeating the command V elocity and appending the status byte ss which will amongst other things inform the calling program as to whether the motor was...

Страница 128: ...total when measured from the bottom of the spindle rotating in air Check to see if the rheometer coupling appears bent if so the unit is in need of service see Appendix L for details on returning you...

Страница 129: ...es not apply to instruments with ball bearing suspension See Section I 7 Display Reading Will Not Stabilize Special characteristic of sample fluid There is no problem with the rheometer Refer to Appen...

Страница 130: ...OM port in use and click the PROPERTIES button or double click the COM port in use Click Port Settings then Advanced Ensure the check box labeled Use FIFO buffers requires 16550 compatible UART is che...

Страница 131: ...wder testing Due to copyright restrictions these articles cannot be emailed Please request a hardcopy of articles by calling our customer service department or by emailing marketing brookfieldengineer...

Страница 132: ...ld Engineering Laboratories Inc 11 Commerce Boulevard Middleboro MA 02346 U S A Telephone 508 946 6200 FAX 508 946 6262 www brookfieldengineering com For repair or service outside the United States co...

Страница 133: ...ase photocopy and retain this tem plate so that additional copies may be made as needed BROOKFIELD ENGINEERING LABORATORIES INC 11 Commerce Blvd Middleboro MA 02346 T EL 508 946 6200 or 800 628 8139 F...

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