BROOKFIELD DIGITAL VISCOMETER MODEL DV
Contents
1. 9 merry 10 11 Appendix A Viscosity Ranges 22222 12 Appendix Variables Viscosity Measurement 0 0000 00 15 Appendix Spindle and Model Codes 422 2 5 100 00000000000000000000000000404000021 17 Appendix D Calibration 19 Appendix Model A Laboratory Stand with Parts Identification 25 Appendix F Fault Diagnosis and Troubleshooting 2 0 27 Appendix G Warranty Repair 1 2 2 29 INTRODUCTION The Brookfield DV E 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 of which was included with your DV E and can be downloaded in pdf form from the Brookfield website The principle of operation of the DV E is to rotate 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 m2. K 1 000 M 1 000 000 N RPM In taking viscosity measurements with the DV E Viscometer there are two considerations which pertain to the low viscosity limit of effective measurement 1 Viscosity measurements should be accepted within the equivalent Torque Range from 10 to 100 for any 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 accuracy of the instrument All DV E Viscometers have a full scale range accuracy of 1 of any spindle speed rotation We discourage taking readings below 10 of range because the potential viscosity error of 1 is a relatively high number compared to the instrument reading Brookfield Engineering Labs Inc Manual No M 98 350 E1203 second consideration involves the mechanics of fluid flow rheological measurements of fluid flow properties should be made under laminar flow conditions Laminar flow is flow wherein all particle movement is in layers directed by the shearing force For rotational systems this means all fluid movement must be circumferential When the inertial forces on the fluid become too great the fluid can break into turbulent flow wherein the movement of fluid particles becomes random and the flow can not be analyzed with standard math models This turbulence creates a falsely high viscometer reading with the degree
3. Brookfield Engineering Labs Inc Page 19 Manual No M 98 350 E1203 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 Thermosel or Spiral Adapter the fluid is normally discarded Calibration Procedure for LV 1 4 and RV HA HB 2 7 Brookfield spindles 1 Place the viscosity standard fluid in the proper container into the water bath 2 Lower the DV E 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 and guard leg if supplied should be immersed in the bath for a minimum of hour stirring the fluid periodically prior to taking measurements 5 After 1 hour check the temperature of the viscosity standard fluid with an accurate thermometer Fluid must be within 0 1 C of the specified temperature normally 25 C Allow longer soak time if required to come to test temperature 6 If the fluid is at test temperature 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 val
4. Section 2 Considerations for Making Measurements e Dial Viscometer Operating Manual Appendix Viscosity Ranges e Dial Viscometer Operating Manual Appendix Variables in Viscosity Measure ment Brookfield Engineering Labs Inc Manual No M 98 350 E1203 LI Perform a calibration check Follow the instructions Appendix D e Verify tolerances are calculated correctly e Verify 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 H for details on how to return your viscometer Brookfield Engineering Labs Inc Page 28 Manual No M 98 350 E1203 Appendix G Warranty Repair Service Warranty Brookfield Viscometers are guaranteed for one year from date of purchase against defects in materials and workmanship The Viscometer must be returned to Brookfield Engineering Laboratories Inc or the Brookfield dealer from whom it was purchased for no charge warranty evaluation 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 as shown below 1 Remove and return all spindles properly packed for shipping 1 Clean excess testing material off the instrument 1 Include MSDS sheets for all materials tested with this instrument 1 Protect the pointer shaft with a shipping cap as shown
5. 350 E1203 1 6 Instrument Controls The following describes each switch s function MOTOR ON Turns the motor ON or OFF AUTO RANGE Presents the maximum 100 torque viscosity attainable using the selected spindle at the selected speed This value is referred to as full scale range The allowable error for the viscosity measurement is 1 of full scale range Note Pressing and holding the AUTO RANGE key during power on will enable the viscosity display to be read in either CGS cP or SI units SPEED SPINDLE SWITCH Sets the viscometer in either speed select or spindle select see Table in Appendix mode When set in the left position the operator may select speed of rotation When set in the right position the operator may select spindle Note This is a three 3 position switch We recommend that the switch be set to the middle position when finished with spindle or speed adjustment This will prevent an accidental change of parameters during a test SELECT KNOB This knob is used to scroll through the available speed or spindle selections see Table in Appendix C This knob is active when the switch is set to the left speed or right spindle position Rotate the knob clockwise to increase value and counter clockwise to decrease value 1 7 Cleaning A Be sure to remove spindle from instrument prior to cleaning Severe instru ment damage may result if cleaned in place Instrum
6. Set with Case 4 spindles for LVDV E 6 Spindles for RV HA and HBDV E 4 Power Cord 5 Guard Leg LVDV E and RVDV E only 6 Carrying Case 7 Shipping Cap Please check to be sure that you have received all components and that there is no damage If you are missing any parts please notify Brookfield Engineering or your local Brookfield agent immediately Any shipping damage must be reported to the carrier Brookfield Engineering Labs Inc Manual No M 98 350 E1203 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 Hot live Black Brown Neutral White Blue Ground earth Green Green Yellow 1 3 Specifications Speeds 0 3 0 5 0 6 1 0 1 5 2 0 2 5 3 0 4 0 5 0 6 0 10 12 20 30 50 60 100 Weight Gross Weight 20 Ib 9 kg Net Weight 17 Ib 7 7 kg Carton Volume 1 65 cu ft 0 05 m3 Carton Dimension 19x 10x 15 in 48 x 25 x 38 cm Operating Environment 0 C to 40 C Temperature Range 32 F to 104 F 20 80 R H non condensing atmosphere Accuracy 1 0 Full Scale Range in Use See Appendix D for details Reproducibility 0 2 of Full Scale Range Electrical Certifications Conforms to CE Standards BSEN 50081 1 Emission Standard Light Industrial BSEN 50082 1 Immunity Standard Light Industrial BSEN 50081 2 Emission Standard Industrial BSEN 50082 2 Immunity Standard Industrial BSEN 61010 1 Safety requirem
7. Speed Selection amp Setting There 18 rotational speeds available on the DV E Viscometer These speeds correspond to the standard LVF LVT RVF RVT HAT and HBT models and they are combined sequentially See Table 1 below Table 1 DV E Speeds Setting the SPEED SPINDLE switch in the left position will allow the operator to adjust the speed selection The SELECT knob can be rotated until the desired speed is selected Once the desired speed is shown on the display set the SPINDLE SPEED switch to the middle position The viscometer will rotate the spindle at the selected speed when the motor switch is in the ON position A motor on condition is indicated on the display by RPM shown beside the speed When the motor switch is in the OFF position OFF will be displayed beside the speed Brookfield Engineering Labs Inc Manual No M 98 350 E1203 cP 12RPM 501 cP 120FF 501 MOTOR OFF Figure 4 Note When the motor switch is in the ON position any change to the selected speed will be effective immediately When collecting data at multiple speeds you may wish to leave the SPEED SPINDLE switch in the left position to facilitate speed changes Also when the motor switch is turned off the display will hold the last measured torque value and measured viscosity The DV E Viscometer employs an optical signal pick up inside the instrument to detect the torque value of the calibrated spring Th
8. 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 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 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 A guard leg is supplied with all LV and RV series instruments but not with the HA or HB series It s shape 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 optional 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
9. 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 recom mended method of operation to suit their needs Brookfield Engineering Labs Inc Manual No M 98 350 E1203 Appendix Model A Laboratory Stand with Parts Identification BROOKFIELD LABORATORY VISCOMETER VS 35Y UNIVERSAL LAB STAND CLAMP ASSEMBLY Brookfield Engineering Labs Inc Manual No M 98 350 E1203 see ITEM PART DESCRIPTION QTY 1 vs 20 UPRIGHT ROD 2 51 BASE 3 53 LEVELING SCREW 3 4 vs 21 AM NUT 5 5 35 CLAMP 6 540 GEAR SCREW ASSEMBLY 7 5 CLAMP SCREW ASSEMBLY 8 vs 29 TENSION INSERT 9 _vs 29w BELLEVILLE SPRING WASHER 2 10 vs 28 TENSION SCREW 11 50S103208S25B _ SCREW 4 40 X 3 8 LG SOC HD CAP 18 8 SS 12 ROD EXTENSION 4 LONG OPTIONAL BLM 4E2 RODE EXTENSION 8 LONG OPTIONAL Figure E 1 Unpacking Check carefully to see that all the components are received with no concealed damage 1 base 1 jam nut 3 leveling screws 1 clamp assembly 1 upright rod Remove the three 3 level
10. 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 optional Spindle 15 cP at 60 RPM 2 1 optional Spindle 100 cP at 20 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 Manual No M 98 350 E1203 Appendix B Variables in Viscosity Measurement 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 test 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 the lab or process conditions There are two categories of fluids Newtonian These fluids have the same viscosity at different Shear Rates different and are called Newtonian over the Shear Rate range they are measured Non Newtonian These fluids have different viscosities at different shear rates different RPM s They fall into tw
11. out of specification or out of range operation When Torque readings exceed 100 0 over range the display changes to that shown in Figure 6 cP EEEE 1 RPM EEEE 501 Figure 1 6 You must change either speed or spindle to correct this condition If you operate at spindle speeds that produce Torque below 10 0 under range the DV E displays both Torque and cP Viscosity with flashing unit designations The parameters of Torque and cP Viscosity will also flash prior to one complete spindle revolution It is not recommended that readings are taken while parameters are flashing 9 0 10 9 0 501 Figure 1 7 Negative Torque will be displayed as shown in Figure 8 cP 10 1 0 501 Figure 1 8 Viscosity values will be displayed when Torque is below zero Brookfield Engineering Labs Inc Page 10 Manual No M 98 350 E1203 1 6 Operation The following procedure is outlined for making a viscosity measurement a 600 mL low form Griffin beaker 1 Mount the guardleg on the DV E Viscometer LV and RV series Be sure that the motor is OFF before attaching the spindle Select a spindle and attach it to the lower shaft 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 Insert and center spindle in the test material until the fluid s level is
12. BROOKFIELD DIGITAL VISCOMETER MODEL DV E Operating Instructions Manual No M 98 350 E1203 SPECIALISTS IN THE MEASUREMENT AND CONTROL OF VISCOSITY BROOKFIELD ENGINEERING LABORATORIES INC 11 Commerce Boulevard Middleboro MA 02346 1031 USA TEL 800 628 8139 or 508 946 6200 FAX 508 946 6262 www brookfieldengineering com TABLE OF CONTENTS 0 ae 3 a ace cas eps ce aca tacts 3 12 eas ened meade 4 L3 SPS CHAS MLNS 4 O a aaa ceca Dee aad mgt 4 I 5 Safety Symbols and Precautions op c22cs ccecsceeseceseacceodecocesacdsstecedesaactecdcanvecd sstesccecaceaceds 5 LO seasan anise 6 a a Eia Eia aa aTe ERES 6 o CETINE STARU DEEE 7 E Ee 7 M2 Spindle Selection eens ce pate ane 7 I 3 Speed S lecton amp Setting 8 Autorange and CGS or SI Units Selection
13. Thermo Container at the test tem perature 1 Install the tube end cap and put the proper amount of HT viscosity standard fluid into the HT 2 or HT 2DB 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 attach the solid shaft spindle to the DV E 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 Calibration Procedure for UL Adapter When a UL Adapter is used the water bath should be stabilized at the proper temperature 1 Install the tube end cap and 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 E 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 Calibration Procedure for DIN Adapter Accessory When a DIN Adapter is used the water bath should be stabil
14. ar Rate Spindle 1 SEC LVDV E 120 400K 3 800 1 60M 30 100K 2 0 60 200K 35 10K 35 10K 110 38 SSA Viscosity cP Thermosel Shear Rate Spindle 1 SEC RVDV E HADV E HBDV E 25M 83M 10M 333M 1 4M 133M 100 400 13M 500 17M 2M 67M iM 4M 133M 2 67M 8M 267M 73 10K 292 10K 73 10K 292 SC4 83 SSA 1 29N 121 SOK 242 SOK 970 50 K UL Adapter Viscosity cP UL Shear Rate Spindle 1 SEC LVDV E RVDV HADV HBDV E YULA 15 or 15Z 1 224N 1 0 2K 6 4 2K 12 8 2K 51 2 2K K 1 000 M 1 000 000 N RPM Brookfield Engineering Labs Inc Manual No M 98 350 E1203 DIN Adapter Accessory Viscosity cP DAA Shear Rate Spindle 1 SEC LVDV E RVDV E HADV E HBDV E 5 1 29N 12 38K 12 5K 24 5K 98 5K 1 29 3 10K 36 10K 73 10K 292 10K 1 29N 11 38K 12 50K 242 970 50K Spiral Adapter Viscosity cP DAA Shear Rate Spindle 1 SEC LVDV E RVDV E HADV E HBDV E SA 70 0 68 68 100 98 1M 1M 2M 2M 8 84 Se 1 100 RPM Helipath with T Bar Spindles Viscosity cP T Bar Spindle LVDV E RVDV HADV E HBDV E 156 62K 2M 400K 4M 800K 16M 3 2M 312 124K 4M 800 K 8M 1 6M 32M 64M E 780 312K 10M 2M 20 M 4M 80M 16M 1 5M 624K 20M 4M 40 M 8 M 160M 32M 3 9M 15M 50M 10M 100 M 20 M 400M 80M 7 8M 31M 100M 20M 200M 40M 800M 160M
15. ar rates The faster the spindle speed the higher the shear rate Brookfield Engineering Labs Inc Page 15 Manual No M 98 350 E1203 The shear rate of a given measurement is determined by the rotational speed of the spindle the size and shape of the spindle the size and shape of the container used and therefore the distance between the container wall and the spindle surface 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 E 1 4 or RVDV E 2 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 98 350 E1203 Appendix Spindle Model Codes Each spindle has a two digit code which is scrolled via the select knob on the DV E The spindle code directs the DV E to calculate viscosity for the spindle that is being used The spindle multiplyer constant SMC is used to calculate full scale viscosity range for any spindle speed combination refer to Appendix D Spindle codes are listed in Table C 1 Table C 1 SPINDLE CODE SMC SPINDLE SMC RV2 02 RV3 03 RV4 04 RVG 06 HAS 03 HA5 05 HA6 06 HA7 07 HB2 02 HB3 03 5 4 16 16 128 5 05 HB6 06 HB7 07 61 LV2 62 63 Lv5 65 Brookfield Eng
16. at the immersion groove on the spindle s shaft With a disc type spindle it is sometimes necessary to tilt the spindle slightly while immersing to avoid trapping air bubbles on its surface You may find it more convenient to immerse the spindle in this fashion before attaching it to the Viscometer To make a viscosity measurement select a speed and follow the instructions in Sections 2 and 3 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 Additional information on making viscosity measurements is available in Appendix B or the Brookfield publication More Solutions to Sticky Problems Switch the MOTOR ON OFF switch to turn the motor OFF when changing a spindle or changing samples Remove spindle before cleaning 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 B Variables in Viscosity Measurements Brookfield Engineering Labs Inc Manual No M 98 350 E1203 Appendix A Viscosity Ranges LV and RV HA HB Viscometers Viscosity Range cP Viscometer LVDV E 2M RVDV E 100 13M HADV E 200 26M HBDV E 800 106 Small Sample Adapter and Thermosel Viscosity cP SSA Thermosel She
17. ater bath should be stabilized at test temperature Viscometers with the letters LV or RV in the model designation should have the guard leg attached Normal 25 C Standard Fluids High Temperature Standard Fluids for use Viscosity cP Viscosity cP with Thermosel Accessory 5 000 HT 30 000 12 500 HT 60 000 30 000 HT 1000 000 Calibrated at three viscosity temperatures 25 93 3 149 Refer to Brookfield catalog for more information Table D 1 Silicone Oils 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 are not contaminated Normal
18. d 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 Interpretation of Calibration Test Results When verifying the calibration of the DV E the instrument and viscosity standard fluid error must be combined to calculate the total allowable error The DV E is accurate to 1 of any full scale spindle speed viscosity range Brookfield Viscosity Standards Fluids are accurate to 1 of their stated value EXAMPLE Calculate the acceptable range of viscosity using RVDV E 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 10 000 Full Scale Viscosity Range cP TK SMC RPM Brookfield Engineering Labs Inc Page 22 Manual No M 98 350 E1203 Where SMC 1 0 from Table C2 10 from Table Full Scale Viscosity Range 17 102 10 000 50 000 The viscosity is accurate to 500 cP which is 1 of 50 000 2 The viscosity standard fluid is 12 257 cP Its accuracy is 1 of 12 257 or 122 57 cP 3 Total
19. easured with a rotary transducer which provides a torque signal The measurement range of a DV E in centipoise or milliPascal seconds is determined by the rotational speed of the spindle the size and shape of the spindle the container in which the spindle is rotating 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 E 673 7 0 0673 RVDV E 7 187 0 0 7187 HADV E 14 374 0 1 4374 HBDV E 57 496 0 5 7496 The higher the spring torque the higher the measurement range The viscosity measurement range for each spring torque may be found in Appendix A All units of measurement are displayed according to either the CGS cP system or the SI mPaes system 1 Viscosity appears in units of centipoise shown as or milliPascal seconds shown as 5 on the DV E display 2 Torque appears in units of dyne centimeters or Newton meters shown as percent in both cases on the DV E display The equivalent units of measurement in the SI system are calculated using the following conver sions SI CGS Viscosity 1 mPaes 1cP Torque 1 Newton m 107 dyne cm References to viscosity throughout this manual made in CGS units DV E Viscometer provides equivalent information in SI units see Section 4 AUTORANGE 1 1 Components 1 DV E Viscometer 2 Laboratory Stand Model A 3 Spindle
20. eldengineering com For repair or service outside the United States consult Brookfield Engineering Laboratories Inc or the dealer from whom you purchased the instrument For repair or service in the United Kingdom 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 email service brookfield co uk www brookfield co uk For repair or service in Germany return to Brookfield Engineering Laboratories Vertriebs GmbH Hauptstrasse 18 D 73547 Lorch Germany Telephone 49 7172 927100 FAX 49 7172 927105 email info brookfield gmbh de www brookfield gmbh de On site service at your facility is also available from Brookfield Please contact our Service Department for details Brookfield Engineering Labs Inc Manual No M 98 350 E1203 VISCOSITY TEST REPORT _ TEST INFORMATION SAMPLE MODEL SPINDLE DIAL READING FACTOR VISCOSITY SHEAR TEMP TIME TORQUE cP RATE C g ep 1S ajdwexa je id 51 jaays jjo 1ea 61 1 CONCLUSIONS papaau se apew Aew jeuonippe ey os ajejdwa si pue do aseald BROOKFIELD ENGINEERING LABORATORIES INC 11 Commerce Boulevard Middleboro 02346 TEL 508 946 6200 or 800 628 8139 USA FAX 508 946 6262 www brookfieldengineering com
21. ent and Keypad Clean with dry non abrasive cloth Do not use solvents or cleaners Immersed Components spindles Spindles are made of stainless steel Clean with non abrasive cloth and solvent appropriate for sample mate rial that is not aggressive to immersed components When cleaning do not apply excessive force which may result bending spindles Brookfield Engineering Labs Inc Manual No M 98 350 E1203 ll GETTING STARTED 1 Power Up Turn the power switch located on the rear panel to the ON position This will result in the following screen display BROOKFIELD DV E RV VISCOMETER Figure 11 1 After a few seconds the following screen appears BROOKFIELD DV E VERSION 1 00 Figure 11 2 After a short time the display will clear and the default screen is displayed cP 100 501 Figure 11 3 1 2 Spindle Selection LVDV E Viscometers are provided with a set of four spindles and a narrow guardleg RVDV E Viscometers come with a set of six spindles and a wider guardleg HADV E and HBDV E Viscometers come with a set of six spindles and no guardleg See Appendix D for more information on the guardleg The spindles are attached to the viscometer by screwing them to the male coupling nut Note that the spindles and coupling have a left hand thread The lower shaft should be held in one hand lifted slightly and the spindle screwed to the left The face of the spindle nut and the matchi
22. ents for electrical equipment for measurement control and laboratory use Approved Standards CSA Std C22 2 No 151 M1986 Laboratory Equipment CSA Class 8721 81 Laboratory Equipment This product has been certified to the applicable CSA and ANSI UL Standards for use in Canada and the U S Installation Category over voltage category Classification of parts of installation systems or circuits in local level portable equipment appliances etc 1 4 Set Up 1 To assemble the Model A Laboratory Stand place the upright rod into the base refer to assembly instructions in Appendix E The rack gear and clamp assembly should face the front of the base The upright rod is held in place with the jam nut which is attached from the bottom of the base Tighten this nut with a suitable wrench spanner Attach leveling feet Brookfield Engineering Labs Inc Manual No M 98 350 E1203 2 Insert the mounting rod the back of the DV E Viscometer into the hole on the clamp assembly Be sure that the clamp screw VS 41Y is loose 3 Adjust the Viscometer to be as close to level as possible while tightening the clamp screw Tighten the VS 41Y clamp screw 4 Viscometer must be leveled The level is adjusted using the three leveling screws on the base Adjust so that the bubble level on top of the DV E is centered within the circle Note Check level periodically during use 5 Remove the Viscometer shipping cap from the p
23. ference allows the factors between the RV and HA HB 1 amp 2 spindles to follow the same ratios as the instrument torque even though the boundary conditions are different Brookfield Engineering Labs Inc Manual No M 98 350 E1203 recommended procedures of using a 600 ml beaker and the guard leg are difficult for some customers to follow The guard leg is item to clean In some applica tions 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 circum stance 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 Solu tions to Sticky Problems Section 3 3 10 It is important to note that for many viscom LV Guardleg RV Guardleg eter users the true viscosity is not as impor tant 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
24. in Figure G 1 I Pack the instrument in its original case Cases are avail able for immediate shipment from Brookfield If the case is not available take care to wrap the instrument with enough material to support it Avoid using foam peanuts or shredded paper J DO NOT send the laboratory stand unless there is problem with the upright rod clamp or base If there is a problem with the stand remove the upright rod from Figure G 1 the base and individually wrap each item to avoid con tact with the instrument Do not put lab stand in vis cometer carrying case 1 out the Viscometer Information Sheet included with the information packet you received on purchase with as much information as possible to help expedite your service If you do not have this form please in clude a memo indicating the type of problem you are experiencing or the service you need performed Please also include a purchase order number for us to bill against 1 Mark the outside of the shipping box with handling instructions for example Handle with or Frag ile Delicate Instrument Brookfield Engineering Labs Inc Page 29 Manual No M 98 350 E1203 For repair or service in the United States return to Brookfield Engineering Laboratories Inc 11 Commerce Boulevard Middleboro MA 02346 U S A Telephone 508 946 6200 FAX 508 946 6262 email service brookfieldengineering com www brookfi
25. ineering Labs Inc Page 17 Manual No M 98 350 E1203 Table C 2 lists the model codes and spring torque constants for each viscometer model Table C 2 VISCOMETER MODEL ON DV E SCREEN LVDV E 0 09373 RVDV E HADV E HBDV E 8 HB SPECIAL ORDER TORQUE SPRINGS VISCOMETER pie siele MODEL ON DV E SCREEN 2 5xLVDV E 0 2343 2 5LV 5xLVDV E 0 4686 1 4 RVDV E 0 25 1 4RV 1 2 RVDV E 0 5 1 2RV 2xHADV E 4 2HA 2 5xHADV E 2 5HA 2xHBDV E 16 2 5xHBDV E 2 5HB 5xHBDV E Brookfield Engineering Labs Inc Page 18 Manual No M 98 350 E1203 Appendix D Calibration Procedures The accuracy of the DV E 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 D 1 Container size For Viscosity Standards lt 30 000 cP use a 600 ml Low Form Griffin Bea ker 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 Note Container may be larger but may not be smaller Temperature stated on the fluid standard label 0 1 C Conditions The DV E should be set according to the operating instructions The w
26. ing screws from the base and discard the packing material Remove the jam nut from the upright rod Assembly Refer to Figure E1 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 The VS 35Y clamp assembly should be positioned so that the word front is facing the operator This will ensure the cut away slot of the clamp assembly will align properly with the machined key ridge of the viscometer handle Insert the viscometer rod into the cut away hole of the clamp assembly Adjust the instrument level until the bubble is centered within the target and tighten the clamp screw VS 26Y The small clamp adjusting screw Figure E1 on the front of 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 screws until the instrument is level Rotate the Gear Screw to raise or lower the viscometer Brookfield Engineering Labs Inc Page 26 Manual No M 98 350 E1203 Appendix F Fault Diagnosis Troubleshooting Listed are some of the more common p
27. 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 amp 2 spindles of the LV and RV spindle sets Any other LV 3 amp 4 or RV 3 7 spindle can be used in a 600 ml beaker with or without the guard leg to produce correct results The HA and HB series Viscometers Rheometers are not supplied with guard legs in order to reduce the potential problems when measuring high viscosity materials HA HB spindles 3 through 7 are identical to those spindle numbers in the RV spindle set The HA HB 1 amp 2 have slightly different dimensions than the corresponding RV spindles This dimensional dif
28. is optical signal pick up is recorded four times per revolution of the spindle When the spindle begins to rotate at a defined speed four torque values are recorded during the first full revolution of the spindle and averaged together The display reports the average value for both torque and viscosity cP mPaes Thereafter the next torque value recorded by the optical signal pick up is averaged together with the three preceding torque values and the newly calculated torque and viscosity cP mPaes values are then displayed This 4x revolution pick up and display continues as long as the motor is on This algorithm in the instrument firmware is used for all viscosity and torque readings Conse quently the wait time to observe the initial displayed readings for torque and viscosity increase as you go to lower speeds It may also be necessary to allow time for the indicated reading to stabilize Note At speeds of 1 RPM and lower additional time may be required to allow for complete deflection of the torque sensor 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 Additional information on making viscosity measurements is available in Appen dix B or the Brookfield publication More Solutions to Sticky Problems The DV E Viscometer will remember the selected speed a
29. ivot cup This cap is designed to protect the Viscometer spindle coupling nut during shipment Do not attempt to operate the Viscom eter with the shipping cap in place 6 Make sure that the AC power switch at the rear of the DV E 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 The DV E must be earth grounded to ensure against electronic failure 1 5 Safety Symbols and Precautions Safety Symbols The following explains safety symbols which may be found in this operating manual Indicates hazardous voltages be present Refer to the manual for specific warning or caution information to avoid personal injury or damage to the instrument Precautions Ts If this instrument is used in a manner not specified by the manufacturer the protection provided by the instrument may be impaired This instrument is not intended for use in a potentially hazardous environment In case of emergency turn off the instrument and then disconnect the elecrical cord from the wall outlet The user should ensure that the substances placed under test do not release poisonous toxic or flammable gases at the temperatures to which they are subjected to during the testing Brookfield Engineering Labs Inc Manual No M 98
30. ized at the proper temperature 1 Put the proper amount of viscosity standard fluid into the UL Tube Refer to the DAA instruction manual 2 Attach the spindle with extension link and coupling nut onto the DV E Brookfield Engineering Labs Inc Manual No M 98 350 E1203 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 a viscosity reading is taken Calibration 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 E into measurement position Operate the viscometer at 50 or 60 RPM until the chamber is fully flooded 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 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 specifie
31. nd spindle when power is turned off On start up the Viscometer will be set to the previously selected spindle and speed Please see Brookfield publication More Solutions to Sticky Problems Chapter 3 for information on how to select a speed 1 4 Autorange and CGS or SI Units Selection The AUTO RANGE key allows you to determine the maximum calculated viscosity full scale reading possible with the current spindle speed setting Pressing the key at any time will cause Brookfield Engineering Labs Inc Page 9 Manual No M 98 350 E1203 the current viscosity display to change and show that maximum viscosity The screen torque display will now display 100 to indicate this special condition This maximum viscosity and 100 value will be displayed for as long as the AUTO RANGE key is depressed Figure 5 shows the AUTO RANGE function for the situation where the No 1 RV spindle is rotating at 10 RPM The full scale range is 1000 cP or 1000 mPa s cP 1000 10 100 501 Figure 1 5 Pressing and holding the AUTO RANGE key during power on will enable the viscosity unit displayed to toggle between CGS cP and SI units To change the unit format 1 Turn the power off 2 Press and hold the AUTO RANGE key and turn the power ON The DV E will retain the unit selection when the viscometer is turned OFF cS Viscosity cP mPa s 1 cP 1 5 1 5 Out of Range The DV E gives indications for
32. ng surface on the coupling nut 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 DV E must have a Spindle Entry Code number to calculate viscosity values The DV E memory contains parameters for all standard Brookfield spindles and the two digit entry code for each spindle the complete list of spindle entry codes may be found in Appendix C Note The DV E will display the Spindle Entry Code which was in use when power was turned off Setting the SPEED SPINDLE switch to the right position will allow the operator to adjust the spindle selection The SELECT knob can be rotated until the desired spindle number is selected Once the desired spindle number is shown on the display set the SPINDLE SPEED switch to the middle position Brookfield Engineering Labs Inc Manual No M 98 350 E1203 Note Verify the proper spindle entry code for the selected spindle found Appendix Not all spindles have an entry code number that is the same as the spindle number For example the spindle entry code for spindle LV1 is 61 and the spindle entry code for UL Adapter is 00 The DV E will begin to calculate using the new spindle parameters after the spindle number is shown in the display Please see Brookfield publication More Solutions to Sticky Problems Chapter 3 for informa tion on how to select a spindle 1 3
33. o groups 1 Time Independent 2 Time Dependent Time Independent means that the viscosity behavior does not change as a function of time when measuring at a specific shear rate Pseudoplastic Apseudoplastic 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 ahigh 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 means that the viscosity behavior changes as a function of time when measuring at a specific shear rate Thixotropic Athixotropic material has decreasing viscosity under constant shear rate If you set a viscometer at a constant speed recording viscosity values over time and find that the viscosity values decrease with time the material is thixotropic Brookfield publication More Solutions to Sticky Problems includes 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 viscosity values produced will be different because the readings were made at different she
34. roblems that you may encounter while using your DV E Viscometer Review these items before you contact Brookfield Spindle Does Not Rotate 1 Make sure the viscometer is plugged in LI Check the voltage rating on your viscometer 115V 220V it must match the wall voltage 1 Make sure the power switch is in the ON position J Make sure the speed set knob is set properly and securely at the desired speed Spindle Wobbles When Rotating or Looks Bent L Make sure the spindle is tightened securely to the viscometer coupling I Check the straightness of all other spindles replace them if bent I 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 Appendix LI Check to see if spindles rotate eccentrically or wobble There is an allowable runout for 1 32 inch in each direction 1 16 inch total when measured from the bottom of the spindle rotating in air LI Check to see if the viscometer coupling is bent if so the unit is in need of service If the pointer sticks and or does not rest at zero the unit is need of service See Appendix G for details on how to return your viscometer Inaccurate Readings LI Verify spindle speed and model selection Ll Verify test parameters temperature container volume method Refer to More Solutions to Sticky Problems
35. ue 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 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 instruc tion 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 hang ing spindle or directly attach the solid shaft spindle to the DV E 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 Calibration Procedure for a Thermosel System A two step process is recommended for the Thermosel Brookfield Engineering Labs Inc Manual No M 98 350 E1203 A Evaluate the calibration of the Viscometer alone according to the procedure outlined in this section entitled Calibration Procedure for LV 1 4 and RV HA HB 2 7 Brookfield spindles B Evaluate the Viscometer with the Thermosel according to the procedure decribed below When a Thermosel is used the controller stabilizes the
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