Brookfield DV-II+ Digital Viscometer Manuel d'utilisateur

- 1 -BROOKFIELD DIGITAL VISCOMETERMODEL DV-II+Operating InstructionsManual No. M/92-161-I496BROOKFIELD ENGINEERING LABORATORIES, INC.240 Cushing Stree

- 10 -II.4 Display SelectionViscometric data (%, cP, SS, SR) is displayed on the left side of the top line. You may “step” throughthe four display op

- 11 -Figure 14Note: 1. If the MOTOR is OFF or the RPM is 0.0, the maximum viscosity displayed will be 0.0cP (or 0.0 mPa.s).2. While the Viscometer is

- 12 -Negative % (Torque) will be displayed as shown in Figure 17:Figure 17cP (Viscosity) and SS (Shear Stress) values will be displayed as "- -

- 13 -II.8 PrintingThe DV-II+ will print data to an attached Serial printer. The printer must be attached to the rear panelSERIAL AND ANALOG output

- 14 -4. After the final press of the PRINT key, the DV-II+ will immediately begin sending out printstrings at the selected user print rate. To stop

- 15 -continuously during the event. Upon completion, the viscometer will display a screen stating thatthe test is complete and will also display the

- 16 -2. When satisfied, the user presses the SELECT SPINDLE key again to enter the seconds settingdisplay:Figure 24Using the UP and DOWN arrow keys,

- 17 -At this point, the viscometer will stop the motor and continue to display this screen until any keyexcept the UP or DOWN arrow key or the PRINT

- 18 -3. At this point, the user need only press the MOTOR ON/OFF key to begin the timed torqueoperation. Any other key will abort the process and he

- 19 -II.10.4 Comments on Print Mode OperationThe high-speed-print jumper (between pins four (4) and nine (9) on the RS-232 plug found on theBrookfiel

- 2 -TABLE OF CONTENTSI. INTRODUCTION ... 31 DV-II+ Components ...

- 20 -APPENDIX A - Cone/Plate Viscometer Set-UpThe Cone/Plate version of the DV-II+ Viscometer uses the same operating instruction procedures asdescr

- 21 -Figure A2Attach the sample cup and swing the clip under the cup to secure it in place. Take care to avoid hittingthe cone with the cup (Figure

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

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

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

- 25 -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

- 26 -Appendix B - Viscosity RangesLV(#1-4) and RV,HA,HB(#1-7) ViscometersSmall Sample Adapter and ThermoselUL Adapter LVDV-II+ 15 2,000,000 RVDV-II+

- 27 -SA-70 .677 - 67.7 98.4 - 98,416 1,050 - 1,050,000 2,100 - 2,100,000 8,400 - 8,400,000(1 - 100 RPM)Spiral Shear RateSpindle (1/SEC) LVDV-II+ RV

- 28 -10% of range because the potential viscosity error of (+/-) 1% is a relatively high number compared tothe instrument reading.The second consider

- 29 -Appendix C - Variables in Viscosity MeasurementsAs with any instrument measurement, there are variables that can affect a Viscometer measurement

- 3 -I. INTRODUCTIONThe Brookfield DV-II+ Viscometer measures fluid viscosity at given shear rates. Viscosity is ameasure of a fluid’s resistance to

- 30 -container wall and the spindle surface.A repeatable viscosity test should control or specify the following:1) Test temperature2) Sample containe

- 31 -Appendix D - Spindle and Model CodesEach spindle has a two digit entry code which is entered via the keypad on the DV-II+. The entry codeallows

- 32 -SC4-14 14 125 0.4SC4-15 15 50 0.48SC4-16 16 128 0.2929SC4-18 18 3.2 1.32SC4-21 21 5 0.93SC4-25 25 512 0.22SC4-27 27 25 0.34SC4-28 28 50 0.28SC4-

- 33 -The full scale viscosity range for any DV-II+ model and spindle may be calculated using theequation:Where:TK = DV-II+ Torque Constant from Table

- 34 -Appendix E - Calibration ProceduresThe accuracy of the DV-II+ is verified using viscosity standard fluids which are available fromBrookfield Eng

- 35 -Brookfield Viscosity Standard Fluids are reusable provided they are not contaminated. Normalpractice for usage in a 600 ml beaker is to return

- 36 -1) Put the proper amount of HT viscosity standard fluid into the HT-2 sample chamber. Theamount varies with the spindle used. (Refer to the Th

- 37 -4) The viscosity standard fluid, together with the spindle, should be immersed in the bath for aminimum of 1 hour, stirring the fluid periodical

- 38 -Brookfield Viscosity Standards Fluids are accurate to (+/-) 1% of their stated value.Example: Calculate the acceptable range of viscosity using

- 39 -is converted to centipoise. Without changing the spindle factor to suit the new boundary conditions, the calculation frominstrument torque to v

- 4 -Please check to be sure that you have received all components, and that there is no damage. If youare missing any parts, please notify Brookfiel

- 40 -Appendix F - Special Speed SetsThe following special speeds sets are available from Brookfield Engineering Laboratories. Allspeeds are in units

- 41 -Appendix G - CommunicationsWhen using the Brookfield Computer Cable (Brookfield part # DVP-80), the DV-II+ will output adata string at a rate of

- 42 -Shear Stress (Dynes/Cm2)=TK * SMC * SRC * Torque= 0.09373 * 32.0 * 0.34 * 62.3= 63.5 Dynes/Cm2The following is a program written in BASIC that r

- 43 -550 ‘+ +560 ‘| Print the parsed Viscometer data string |570 ‘+ +580 LOCATE 4, 1590 PRINT “Here is Viscometer data parsed into i

- 44 -234567891No ConnectionTransmit Data (TxD)No ConnectionHigh Speed Print(Note 1)High Speed Print(Note 1)Serial GroundAnalog GroundAnalog % Torque(

- 45 -APPENDIX H - Model A Laboratory StandLeveling ScrewJam NutBaseClamp ScrewModel A Clamp AssemblyPart No. VS-24YGear ScrewClamp AdjustingScrewFigu

- 46 -Remove the three (3) leveling screws from the base and discard the packing material. Remove the jamnut from the upright rod.Assembly (Refer to

Appendix I - DVE-50 Probe ClipProbe Clip DVE-50 is supplied with all model DV-II+ Viscometers, DV-III Rheometers, and DigitalTemperature Indicators. I

- 48 -Appendix J - Fault Diagnosis and TroubleshootingListed are some of the more common problems that you may encounter while using your Viscom-eter.

- 49 -2. Spindle jammed below zero• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer forrepairDisplay Reading Over 1001. Ov

- 5 -6) 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

- 50 -Inaccurate Readings1. Incorrect spindle/speed selection2. Incorrect spindle code entry3. Non-standard test parameters4. Temperature fluctuations

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

- 6 -SELECT SPINDLEInitiates spindle selection on the first press and then selects the currently scrolled-to spindle whenpressed a second time. This

- 7 -Pressing any key at this point results in the display of the DV-II+ default screen:Figure 6The display will vary slightly depending upon the stat

- 8 -The DV-II+ may also be programmed at Brookfield Engineering for “special” user spindles. These“special” spindles will show up on the spindle scr

- 9 -If the Arrow key is pressed just once and then released, the characters RPM will blink for threeseconds, then will cease blinking resulting in n