Brookfield DV-III Rheometer User Manual

- 1 -BROOKFIELD DIGITAL RHEOMETERMODEL DV-III Operating InstructionsManual No. M/91-210-I297TEL 617-344-4310 or 800-628-8139 (USA ex MA) TLX

- 10 -II. GETTING STARTEDII.1 AutozeroBefore readings may be taken, the Rheometer must be autozeroed. This is done each time the powerswitch is turne

- 11 -The starting screen is the main screen display (Figure 6). Pressing the SELECT SPDL key causesthe cursor to blink under the field for the fir

- 12 -III. PROGRAM MODE TESTINGThe DV-III can store 10 speed set programs and each program may have up to 25 steps. The programlocations are numbered

- 13 -9) If the program is to have less than 25 steps, the End Program Entry command is given by entering“0” for the step speed as the final program

- 14 -Example: If the time in step 3 is 30 seconds (00:30), when the display changes (to step4) 00:30 will appear in the time field as the new default

- 15 -III.4 Using a Speed Set Program from MemoryTo use a speed set immediately after it is entered, begin with the Program Complete screen shownin Fi

- 16 -Speed Set Usage Notes:1) When a speed set is used, all the captured test data is stored in memory until another speed settest is run. When the

- 17 -operating in the Lock-Out mode.Figure 17To review data, print data or exit the Lock-Out mode, you have to disable lock-out.1) Press the PROG RUN

- 18 -key. The speed set program will be printed on the attached printer as shown below.BROOKFIELD DV-III RHEOMETER DATA FOR SPEED SET #1SPEED #01

- 19 -IV. THE OPTIONS MENUThe OPTION key is used to display the Options Menu screen. The Options Menu provides choicesof the following options: OP

- 2 -TABLE OF CONTENTSI. INTRODUCTION ... 31 Components ...

- 20 -Figure 20If the printer is connected correctly, and is “on line”, but does not print, this indicates that the printeris not using the X-on/X-off

- 21 -The print option status is clearly displayed on the main screen at all times. For example, as shownearlier in Figures 6, 8 and 13, “PRTO” indic

- 22 -12) Press CANCEL to exit.NOTE: The LO ALARM is tripped after the % torque reading goes above the alarm settingand then falls below the setting.

- 23 -Sample Name:_____________________________________________________________Operater Name:____________________________Date: 06/21/91 Time: 10:06

- 24 -IV.4 Temperature Display °C or °FThe DV-III will display temperature in either °F or °C. The choice is made from the Options screen.From the

- 25 -The necessary instructions are given via "on screen" instructions with one exception: when thekeyboard test is run, the operator must

- 26 -APPENDIX A - Cone/Plate Rheometer Set-UpThe Cone/Plate (C/P) version of the DV-III Rheometer uses the same operating instruction proceduresas d

- 27 -Remove sample cup and attach the cone to the Rheometer (Note: left hand threads), using the spindlewrench to hold the Rheometer shaft (Figure

- 28 -Figure A4Turn the adjustment ring to the right (counterclockwise as you look down on the instrument) in smallincrements (one or two divisions of

- 29 -When you are satisfied the pins are just hitting (by observing acceptable % readings), make a pencil markon the adjustment ring directly under t

- 3 -I. INTRODUCTIONThe Brookfield DV-III Programmable Rheometer measures fluid parameters of Shear Stress andViscosity at given Shear Rates. Viscosi

- 30 -Each of the five available cones has a specific sample volume, as shown in Table A1. Note that the correctamount of sample fluid should cover t

- 31 -It is best to use a viscosity standard fluid that will be close to the maximum viscosity for a givencone spindle/speed combination.Example: LVDV

- 32 -APPENDIX B - Viscosity RangesThe table below (Universal Spindle Ranges) lists the Spindle Range Coefficients for all spindlesused on DV-III Rheo

- 33 -Universal Spindle RangesDIN-81 81 3,420 36,500 73,000 292,000DIN-82 82 3,420 36,500 73,000 292,000DIN-83 83 11,340 121,300 242,600 970,400DIN-85

- 34 -Example 1: Determine the full scale viscosity range of the LV3 spindle running on anRV series Rheometer at 45 RPM.Spindle Speed = 45 RPMLV3 Spi

- 35 -Thermosel18 0 - 264 1.3 - 30,000 12.8 - 320,000 25.6 - 640,000 103 - 2,560,00021 0 - 186 1.9 - 46,865 20.0 - 500,000 40.0 - 1,000,000 160 - 4,00

- 36 -Helipath with T-Bar SpindlesT-A 156 - 187,460 2,000 - 2,000,000 4,000 - 4,000,000 16,000 - 16,000,000T-B 312 - 374,920 4,000 - 4,000,000 8,000 -

- 37 -APPENDIX C - Variables in Viscosity MeasurementsAs with any instrument, there are variables that can affect a viscosity measurement. These vari

- 38 -A repeatable viscosity test should control or specify the following:1) Test temperature2) Sample container size (or spindle/chamber geometry)3)

- 39 -APPENDIX D - Spindle and Model CodesEach spindle has a two digit code which is entered using the SPDL key on the DV-III key pad. The entrycode

- 4 -Component Part NumberSpindle Set with Case depends on model LVDV-III set of four spindles or SSL RVDV-III set of seven spindles or SSR HA/H

- 40 -Table D1 (continued)Table D2 lists the model codes and spring torque constants for each Rheometer model.The full scale viscosity range for any D

- 41 -The Shear Rate calculation is:Shear Rate (1/Sec) = SRC * RPMWhere:SRC = Shear Rate Constant from Table D1Using Non-standard spindles with DV

- 42 -2ω Rc2 Rb2χ2 [Rc2 – Rb2]Shear Rate (1/sec) =Where:Rc= Radius of the container (in centimeters)Rb= Radius of the spindle (in centimeters)χ= Rad

- 43 -APPENDIX E - Calibration ProceduresThe accuracy of the DV-III is verified using viscosity standard fluids which are available fromBrookfield En

- 44 -for usage in a 600 ml beaker is to return the material from the beaker back into the bottle. When usingsmaller volumes in accessories such as S

- 45 -A) Evaluate the calibration of the Viscometer alone according to the procedure outlined inAppendix E, “Calibration Procedure for LV (#1-4) and R

- 46 -3) Lower the DV-III into measurement position. Operate the viscometer at 50 or 60 RPM until thechamber is fully flooded.4) The viscosity standa

- 47 -3) Select a viscosity standard fluid that will give viscosity readings between 10%and 00% of full scale range. Refer to Appendix B for viscosit

- 48 -3) Total allowable error is (122.57 + 500) cP = (+/-) 622.57 cP.4) Therefore, any viscosity reading between 11,634.4 and 12,879.6 cP indicates

- 49 -Section 3.3.10. It is important to note that for many viscometer users the true viscosity is not asimportant as a repeatable day to day value.

- 5 -RS232 Compatible Serial Port for use with attached printer or PC. See Appendix H ofBrookfield application software program called RHEOCALC.Weigh

- 50 -APPENDIX F - VS-27Y Clamp AssemblyThe VS-27Y Clamp assembly holds the DV-III on the upright rod and thus supports it on the base. Theparts are

- 51 -APPENDIX G - CommunicationsThe command set used to communicate with the DV-III is as follows:COMMAND COMMAND RESPONSEName from Computer from DV-

- 52 -The status byte is decoded as follows:Note: These values are not updated in the status byte when the listed condition occurs. They are madeava

- 53 -appending the status byte <ss> which will, amongst other things, inform the calling program as towhether the motor was turned on and/or wh

- 54 -A sample program demonstrating the above principles is contained in the following listing. Pleasenote that this is an example only and does not

- 55 -1265PRINT SPCPRINT SPCPRINT SPCPRINT SPCPRINT SPC(3);1270 DV3COMMAND$ = “V” + HEXRPM$ ‘ Speed command is a V + hex speed value1275GOSUBGOSUBGOSU

- 56 -1550 WHILEWHILEWHILEWHILEWHILE (T2 - T1) < TINTERVAL ‘ Loop until time elapsed = Tinterval1555 T2 = TIMERTIMERTIMERTIMERTIMER1560 WENDWENDWEN

- 57 -1835GOSUBGOSUBGOSUBGOSUBGOSUB 1455 ‘ Delay between characters1840 NEXTNEXTNEXTNEXTNEXT CMD1845 RETURNRETURNRETURNRETURNRETURN1850 ‘1855 ‘+——————

- 58 - Brookfield Engineering LabsDV-III External Mode Demonstration ProgramCopyright 1991This program is intended to demonstrate the use of the RS-23

- 59 -Output ConnectionsThe DV-III has two analog voltage outputs available for strip chart recording and one RS232 outputfor computer or serial print

- 6 -2) Insert the mounting handle on the back of the DV-III into the hole on the clamp assembly(Figure 2).Upright RodRack GearClamp AssemblyClamp S

- 60 -When connecting the DV-III to a serial printer, use Brookfield Printer Cable (Part No. DVP-81). Thecable connections are:Printer RxD (usually p

- 61 -APPENDIX H - DVE-50 Probe ClipProbe Clip DVE-50 is supplied with all model DV-III Rheometers and Digital TemperatureIndicators. It is used to a

- 62 -APPENDIX I - Fault Diagnosis and TroubleshootingA diagnostics option (Option 5) was supplied on DV-III Rheometers with firmware versions up to 2

- 63 -2. Spindle jammed below zero• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repairDisplay Reading Over 1001. O

- 64 -Appendix J - Warranty Repair and ServiceWarrantyBrookfield Viscometers are guaranteed for one year from date of purchase against defects in mate

- 7 -4) Select the ribbon cable end with the adjacent, heavy, black mass. Insert this end of theribbon cable into the DV-III Rheometer head. Insert

- 8 -I.6 Key FunctionsFigure 4 shows the control keys on the face of the DV-III Rheometer. The following describes eachkey’s function.Figure 4MOTOR O

- 9 -OPTIONConfigures the DV-III printer output; changes between °C and °F temperature; sets high andlow alarms; displays and/or prints test data; sel