BROOKFIELD DV1 Digital Viscometer Operating Instructions Manual No. M14-023 SPECIALISTS IN THE MEASUREMENT AND CONTROL OF VISCOSITY with offices in: Boston • Chicago • London • Stuttgart • Guangzhou BROOKFIELD ENGINEERING LABORATORIES, INC. 11 Commerce Boulevard, Middleboro, MA 02346 USA TEL 508-946-6200 or 800-628-8139 (USA excluding MA) FAX 508-946-6262 INTERNET http://www.brookfieldengineering.
TABLE OF CONTENTS I. INTRODUCTION......................................................................................................... 5 I.1 I.2 I.3 I.4 I.5 I.6 I.7 I.8 Components........................................................................................................................ 6 Utilities................................................................................................................................ 7 Components and Dimensions........................................
Appendix A - Cone/Plate Viscometer Set-Up............................................................... 31 Appendix B - Viscosity Ranges..................................................................................... 36 Appendix C - Variables in Viscosity Measurements..................................................... 40 Appendix D - Spindle Entry Codes and SMC/SRC Values............................................. 42 Appendix E - Spindle Entry Codes and Range Coefficients..........................
I. INTRODUCTION The Brookfield DV1 Viscometer series has provided exceptional value for viscometer users since its introduction in 1981. Brookfield has continued to develop and improve the DV1 to maintain its position in the market as the best value for Q/C applications. The Brookfield DV1 Viscometer continues in this tradition of innovation, quality and value.
The equivalent units of measurement in the SI system are calculated using the following conversions: SI Viscosity: 1 mPa•s Torque: 1 Newton•m = = CGS 1 cP 107 dyne•cm References to viscosity throughout this manual are done in CGS units. The DV1 Viscometer provides equivalent information in SI units. I.
I.2 Utilities Input Voltage: Input Frequency: Power Consumption: Power Cord Color Code: Hot (live) Neutral Ground (earth) Brookfield Engineering Laboratories, Inc. 115 VAC or 230 VAC 50/60 Hz 50 VA United States United States Black White Green Page 7 Outside States OutsideUnited United States Brown Blue Green/Yellow Manual No.
I.3 Components and Dimensions DV1 Viscometer Model G Laboratory Stand Spindle Set Shipping Cap LV Guard Leg Temperature Probe Option Cone/Plate Option • For use with SSA or C/P: Wrench Temperature Cable SC4-61Y • For use in beaker: Temperature Probe Clip Cone Spindle Sample Cup Temperature Probe Figure I-1 Brookfield Engineering Laboratories, Inc. Page 8 Manual No.
10 5/16 [26.2 cm] 13 13/32 [34.1 cm] DV1 VISCOMETER 7 51/64 [19.8 cm] 5 3/16 [13.2 cm] 14 7/8 [37.8 cm] B-21Y RV GUARD LEG ASSEMBLY 7 3/8 [18.7 cm] 3 3/16 [8.1 cm] 13 7/8 [35.2 cm] 16 13/32 [41.7 cm] GV-1201 LAB STAND BASE ASSEMBLY Figure I-2 Brookfield Engineering Laboratories, Inc. Page 9 Manual No.
I.4 Specifications Speeds: (rpm) Weight: 0.0, 0.3, 0.6, 1.5, 3, 6, 12, 30, 60, 0.5, 1, 2, 2.5, 4, 5, 10, 20, 50, 100 Gross Weight: Net Weight: Carton Volume: Operating Environment: 20 lb 17 lb 1.65 cu ft 9 kg 7.7 kg 0.05 m3 0°C to 40°C Temperature Range (32°F to 104°F) 20% - 80% R.H.: non-condensing atmosphere Viscosity Accuracy: ±1.0% Full Scale Range in Use (See Appendix D for range calculation) Viscosity Repeatability: ±0.
I.5 Installation Note: “IQ, OQ, PQ”, an abbreviated guideline document for installation, operation and performance validation for your DV1 digital viscometer can be downloaded from our website www.brookfieldengineering.com. A more detailed IQ,OQ,PQ procedure is available for purchase from Brookfield or your authorized dealer. 1) Assemble the Model G Laboratory Stand (refer to assembly instructions in Appendix H). 2) Attach the viscometer head to the clamp on the lab stand rod.
Temperature Probe USB B Power Input USB A On/Off Switch Figure I-2 I.7 Key Functions Figure I-3 shows the control keys on the face of the DV1 Viscometer. The following describes each key’s function. HOT KEY Three Hot Keys are located immediately below the display. The action executed by the hot key will be indicated on the display. The actions available will vary with each screen.
MOTOR ON This key is used to turn the motor on, start spindle rotation and start current test. UP ARROW This key is used to Scroll Up (in an increasing value direction) through the available speed or spindle tables. DOWN ARROW This key is used to Scroll Down (in a decreasing value direction) through the available speed or spindle tables. I.
II. GETTING STARTED II.1 Power Up The DV1 Viscometer will go through a Power Up sequence when the power is turned on. The viscometer will present a blue screen for approximately 4 seconds and then the About Screen for 5 seconds. The About Screen is shown below and includes several critical parameters about the viscometer including: viscometer torque (LV, RV, HA, HB, or other), and the firmware version number. Figure II-1 The About Screen can also be accessed through the Options Menu (see Section II.
II.3 Navigation The DV1 Viscometer uses a 3-inch monochromatic display with keypad. All user input is made through the keypad. See Section I.7 for a description of Key Functions. Hot Keys are used on the DV1 Viscometer to assist with menu navigation. There are three Hot Keys located immediately under the viscometer display. The function of each key is indicated at the bottom of the display and may change depending on the screen currently in view.
The spindles are attached to the viscometer by screwing them onto the coupling nut on the lower shaft (see Figure II-3). Note that the spindles have a left-hand 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 lower shaft should be smooth and clean to prevent eccentric rotation of the spindle. Spindles can be identified by the number on the side of the spindle coupling nut.
The DV1 requires a Spindle Entry Code number to calculate viscosity values. The two-digit code for each spindle can be found in Appendix D. Pressing the SPINDLE Hot Key on the Home screen will present the Set Spindle screen. Figure II-5 Press the Up/Down Arrow keys to scroll through the list of available spindles. When the correct spindle number is shown on the display, press the SELECT Hot Key. The display will return to the Home screen.
II.6 Speed Selection Table II-1 shows the available speed selections. DV1 SPEEDS SETS 100 50 20 10 5.0 4.0 2.5 2.0 1.0 0.5 0.0 60 30 12 6.0 3.0 1.5 0.6 0.3 0.0 When scrolling “UP” Beginning Table II-1 NOTE: DV1 speeds are organized to conform to the historical speed sets available on the Brookfield Dial Reading viscometer. Speeds from 0.3-60 RPM are traditionally found on the LVT viscometer. Speeds from 0.5-100 RPM are traditionally found on RVT, HAT and HBT viscometers.
TIP: Speeds are grouped according to traditional LV and RV settings. TIP: When setting a test procedure, be aware if the data must be compared to another site. If a comparison is required, it is best to utilize speeds that are traditionally associated with the torque range of the viscometer. This will ensure that all test sites will be able to reproduce the test method exactly. The Set Speed screen also includes the currently selected spindle and the Full Scale Range of viscosity (FSR).
II.8 Options The Options Menu is accessed from the Home screen by pressing the OPTIONS Hot Key. Use the Arrow Keys to select from the following functions: • RUN UNTIL • SERVICE • ABOUT • Tp • Tp • • • Set the end condition for the test: Time, Torque or Temperature. No user access. Display start up screen with viscometer torque and firmware version number. LANGUAGE Choose from available languages. TMP. OFFSET Set an offset value for the DVP-94Y temperature probe (optional). TEMP.
TIP: Slow speeds require longer time for equilibrium of the measurement sensor. When using speed values less than 5 RPM, consider a time value of 60 seconds or longer. The DV1 Viscometer can be set to infinite time by choosing Time as the end condition and setting the time value to zero; 00 Hours : 00 Minutes : 00 Seconds. In this configuration, the test will run continuously until the operator presses the Motor Off button. Run Until Torq. requires that a % Torque value be selected.
time clock as it counts down to 00:00:00. Figure II-7 The Variable selection will present the primary parameter on the top line and the remaining parameters will be presented in succession on the second line. Each parameter on the second line will be displayed for 2 seconds. Figure II-8 shows the active test screen with Time presented on the second line waiting for %Torque and then Temperature. Figure II-8 II.8.3 Visc Units The units of viscosity display can be configured as defined in the table below.
to scroll to the required value. Press the SELECT Hot Key to accept the change. Press the BACK or HOME Hot Key to cancel any change. Tp II.8.5 Tmp. Offset The DV1 Viscometer supports the use of an offset for the temperature measurement through the DVP-94Y temperature probe. The Brookfield DVP-94Y temperature probe has an accuracy of +/1.0°C in the range of -100° to 149.9°C and +/-2.0°C in the range of 150° to 300°C.
TIP: When contacting Brookfield for service/support, note the information from the About Screen and have the instrument serial number available (found on the serial tag located on the back of the instrument head). The About screen also provides a collection of instrument check values that can assist Brookfield with troubleshooting. Pressing the NEXT Hot Key will advance the About screen through two additional screens with data.
• • • • • • • • • Actual Time of Test Test Mode (Run Until) Test Mode Parameter (Manual indicates no time given) Spindle represented by both name and number Torque range of the DV1 (HB) Speed Measured Viscosity Measured Temperature Measured Torque Communication to the printer can be reset by using the Connect function in the Options menu (see Section II.8.7). Brookfield Engineering Laboratories, Inc. Page 25 Manual No.
III. MAKING VISCOSITY MEASUREMENTS III.1 Quick Start The DV1 Viscometer uses the same methodology for viscosity measurements as the Brookfield Dial Reading Viscometer and the DV series of Digital Viscometers. If you have experience with other Brookfield equipment, this section will give you the quick steps for taking a viscosity reading. If you have not used a Brookfield Viscometer before, skip this section and go to Section III.2 for a detailed description. A) Assemble the Laboratory Stand.
The LV (1-4) and RV (1-7) spindles are designed to be used with the guardleg attached. Measurements made without the guardleg will provide repeatable results but may not provide “true” results. When comparing data with others, be sure to specify the sample container and presence/absence of the guardleg. Many samples must be controlled to a specific temperature for viscosity measurement.
3. Attach the guard leg (LV and RV series). Attach the spindle to the lower shaft. Lift the shaft slightly, holding it firmly with one hand while screwing the spindle on with the other (NOTE: Left-handed threads). Avoid putting side thrust on the shaft. 4. Enter the spindle number into the DV1 Viscometer by using the SPINDLE Hot Key. Enter the speed of rotation by using the SPEED Hot Key. 5. Insert and center the spindle in the test material.
Figure III-1 TIP: If communication cannot be established between the DV1 and Wingather SQ, select the CONNECT function within the DV1 Options menu (see Section II.8.7).
Figure III-4: Data Table and Graph Figure III-5: Help Menu Brookfield Engineering Laboratories, Inc. Page 30 Manual No.
Appendix A - Cone/Plate Viscometer Set-Up This Cone/Plate version of the DV1 uses the same operating instruction procedures as described in this manual. However, the “gap” between the cone and the plate must be verified/adjusted before measurements are made. This is done by moving the plate (built into the sample cup) up towards the cone until the pin in the center of the cone touches the surface of the plate, and then by separating (lowering) the plate 0.0005 inch (0.013mm).
A.2 Setup 1. Be sure that the Viscometer is securely mounted to the Laboratory Stand, leveled and zeroed with no cone or cup attached and 0% torque is displayed. 2. Figure A-2 shows a typical water bath setup. Connect the sample cup inlet/outlet ports to the water bath inlet and outlet and set the bath to the desired test temperature. Allow sufficient time for the bath to reach the test temperature. The temperature range of the Sample Cup (CPE-44Y or CPE-44PY) is 0°100°C.
A.3 Setting the Gap 1. Move the toggle switch to the right; this will turn on (enable) the Gap Setting Feature. The Pilot (red) light will be illuminated. 2. If the contact light (yellow) is illuminated, turn the micrometer adjustment ring clockwise (as you look down on the instrument) until the light is just breaking contact, i.e., flickering (see Figure A-5). 3.
A.4 Making Measurements with Cone/Plate Geometry Viscosity measurements are made on the DV1 C/P viscometer in the same way as the DV1 viscometer with several exceptions. 1. Prepare the viscometer as is described in Section III.2. 2. Brookfield recommends that you always make cone/plate measurements with temperature control. Be sure that the sample cup is connected to a circulating waterbath and that it is at the target temperature.
A.5 Verifying Calibration 1. Determine the appropriate sample volume. Refer to Table A-1 to determine the correct sample volume required for the spindle to be utilized. 2. Select a Brookfield Viscosity Standard fluid that will give viscosity readings between 10% and 100% of Full Scale Range. Refer to Appendix B for viscosity ranges of cone spindles; ranges listed apply to CPA cones. Do not use a silicone viscosity standard fluid with a viscosity value greater than 5000 cP with a Cone/Plate.
Appendix B - Viscosity Ranges LV (#1-4) and RV,HA,HB (#1-7) Viscometers Viscosity Range (cP) Viscometer Minimum DV1MLV 15 2,000,000 DV1MRV 100* 13,300,000 DV1MHA 200* 26,600,000 DV1MHB 800* 106,400,000 Maximum *Minimum viscosity is achieved with optional RV/HA/HB-1 spindle. (Spindle Code 01) Vane Spindles Spindle Shear Stress Range Pa dyne/cm2 Viscosity Range cP (mPa•s) @ 10 RPM V-71 LV V-72 V-73 V-74 V-75 LV LV LV LV .188-1.88 .938-9.38 9.38-93.8 3.75-37.5 1.88-18.8 9.
Small Sample Adapter and Thermosel SSA and Thermosel Spindle SSA and Thermosel Spindle Viscosity Range (cP) Shear Rate sec-1 DV1MLV SC4-16 120 - 400,000 .29N SV4-18 3 - 10,000 1.32N SC4-25 480 - 1,600,000 .22N SC4-31 30 - 100,000 .34N SC4-34 60 - 200,000 .28N SC4-81 3 - 10,000 1.29N SC4-82 3 - 10,000 1.29N SC4-83 11 - 38,000 1.29N Viscosity (cP) DV1MRV DV1MHA Shear Rate sec-1 DV1MHB SC4-14 1,250 - 4,165,000 2,500 - 8,330,000 10,000 - 33,360,000 .
DIN Adapter Accessory Viscosity (cP) DAA Spindle DV1MLV DV1MRV DV1MHA 24 - DV1MHB 85 2 - 4,000 12 - 86 4 - 3,800 37 - 10,000 73 - 10,000 11 - 38,000 121 - 50,000 243 - 50,000 87 5,000 Shear Rate sec-1 5,000 98 - 5,000 1.29N 292 -10,000 1.29N 970 - 50,000 1.29N Spiral Adapter Spiral Spindle SA-70 Viscosity (cP) DV1MLV 98,500 DV1MRV 98 - 1,000 - 1,050,000 Shear Rate sec-1 DV1MHA DV1MHB 2,100 - 2,100,000 8,400 - 8,400,000 .00677 - .67.
When taking viscosity measurements with the DV1 Viscometer, there are two considerations, which pertain to the low viscosity limit of effective measurement. 1. Viscosity measurements should be taken 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.
Appendix C - 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.
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 shear rates. The faster the spindle speed, the higher the shear rate.
Appendix D - Spindle Entry Codes and SMC/SRC Values When using a standard Brookfield digital Viscometer or Rheometer, each spindle has a two digit entry code which is entered via the keypad on the DV1. The entry code allows the DV1 to calculate Viscosity, Shear Rate and Shear Stress values and can also be calculated when using coaxial cylinder geometry (SSA, ULA, Thermosel, DAA, etc.) and cone/plate geometry. Each spindle has two constants which are used in these calculations.
SPINDLE ENTRY CODE SMC SRC T-C 93 100 0 T-D 94 200 0 T-E 95 500 0 T-F 96 1000 0 ULA 00 0.64 1.223 HT-DIN-81 81 3.7 1.29 SC4-DIN-82 82 3.75 1.29 SC4-DIN-83 83 12.09 1.29 DIN-85 85 1.22 1.29 DIN-86 86 3.65 1.29 DIN-87 87 12.13 1.29 SC4-14 14 125 0.4 SC4-15 15 50 0.48 SC4-16 16 128 0.29 SC4-18 18 3.2 1.32 SC4-21 21 5 0.93 SC4-25 25 512 0.22 SC4-27 27 25 0.34 SC4-28 28 50 0.28 SC4-29 29 100 0.25 SC4-31 31 32 0.
VISCOMETER MODEL TORQUE CONSTANT TK MODEL CODE ON DV1 SCREEN DV1MLV 0.09373 LV 2.5xDV1MLV 0.2343 2.5LV 5xDV1MLV 0.4686 5LV 1/4 DV1MRV 0.25 1/4RV 1/2 DV1MRV 0.5 1/2RV DV1MRV 1 RV DV1MHA 2 HA 2xDV1MHA 4 2HA 2.5xDV1MHA 5 2.5HA DV1MHB 8 HB 2xDV1MHB 16 2HB 2.5xDV1HB 20 2.
Appendix E - Spindle Entry Codes and Range Coefficients The range coefficient is a convenient tool for quickly determining the maximum viscosity that can be measured with a specific spindle/speed combination. Identify the spindle in use and the torque range (LV, RV, HA, HB) of the Viscometer/Rheometer. Look up the Range Coefficient in the following table. Divide the Range Coefficient by the spindle speed to determine the maximum viscosity in centipoise that can be measured. E.g.
Range Coefficient Spindle Entry Code LV RV HA HB LV-3C 67 120,000 1,280,000 2,560,000 10,240,000 T-A 91 18,750 200,000 400,000 1,600,000 T-B 92 37,440 400,000 800,000 3,200,000 T-C 93 9,3600 1,000,000 2,000,000 8,000,000 4,000,000 16,000,000 T-D 94 187,200 2,000,000 T-E 95 468,000 5,000,000 10,000,000 40,000,000 T-F 96 936,000 10,000,000 20,000,000 80,000,000 Spiral 70 98,400 1,050,000 2,100,000 8,400,000 ULA 00 600 6,400 12,800 51,200 HT-DIN-81 8
Appendix F - Calibration Check Procedures For more help go to www.brookfieldengineering.com and download the video. Brookfield’s accuracy statement for viscometers used with standard spindles is +/-1% of Full Scale Range. When measuring viscosity with a specific spindle rotating at a defined speed, the maximum viscosity that can be measured is defined as Full Scale Range. For digital viscometers this value is easily determined by pressing the “AUTORANGE” key.
MINERAL OIL VISCOSITY STANDARD FLUIDS BEL Part No. Viscosity (cP) 25ºC B29 29 B200 200 B600 600 B1060 1,060 B2000 2,000 B10200 10,200 B21000 21,000 B730000 73,000 B200000 200,000 B360000 360,000 Table F-2 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 either pure silicone or mineral oil and are not subject to change over time.
Follow theses steps using one of the recommended spindles to verify calibration of your instrument. 1) Place the viscosity standard fluid (in the proper container) into the water bath. 2) Lower the DV1 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.
Calibration Check Procedure for a Thermosel System A two-step process is recommended for the Thermosel. 1) Evaluate the calibration of the Viscometer alone according to the procedure outlined in the beginning of this section, entitled Calibration Procedure for LV (#1-3) and RV, HA, HB (#1-6) Brookfield spindles. 2) Evaluate the Viscometer with the Thermosel according to the procedure described below. When a Thermosel System is used, the controller stabilizes the Thermo Container at the test temperature.
Calibration Check Procedures for DIN Adapter When a DIN UL Adapter is used, the water bath is stabilized at the proper temperature: 1) Put the proper amount of viscosity standard fluid into the UL Tube. (Refer to the UL Adapter instruction manual). 2) Attach the spindle (with extension link and coupling nut) onto the DV1. 3) Attach the tube to the mounting channel.
5) Measure viscosity and record the viscometer reading; include % and cP (mPa•s). Instrument accuracy is ± 2% of the maximum viscosity range and not the standard 1%. Calibration Check Procedure for Cone/Plate Viscometers 1) Follow the procedures outlined in Appendix A for mechanically adjusting the setting of the cone to the plate. 2) Refer to Appendix A, Table A-1, and determine the correct sample volume required for the spindle to be utilized.
1) Determine Full Scale Viscosity Range using the AUTORANGE key on your instrument or calculate with equation: Full Scale Viscosity Range [cP] = TK * SMC * 10,000 RPM Where: TK = 1.0 from Table D-2 (In Appendix D) SMC = 10 from Table D-1 (In Appendix D) Full Scale Viscosity Range 1 * 10 * 10,000 = 50,000 cP 2 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.
Appendix G - 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.
The guard leg is a part of the calibration check of the Brookfield LV and RV series Viscometer/Rheometer. Our customers should be aware of its existence, its purpose and the effect that it may have on data. With this knowledge, the viscometer user may make modifications to the recommended method of operation to suit their needs.
Appendix H - Laboratory Stands with Parts Identification Release Lever: Push and hold here to move up and down. 1 2 3 3 4 5 4 5 6 6 Model G Item 1 2 3 4 5 6 Part Number VS-CRA-14S VSQA-100 GV-1201 502028071S33B 50S311832S01B GV-1203 Model QB Description Rod and Clamp Assembly (Model G) Rod and Clamp Assembly (Model QB)† Base, Models G and QB (includes 2 VS-3 leveling screws) Flat washer 5/16 x 7/8 x .071” Screw, 5/16-18 x 1" lg. hex head Leveling Screws, Model G and QB Qty.
UNPACKING Check carefully to see that all the components are received with no concealed damage. 1 Base, with 2 Leveling Screws, packed in a cardboard carton 1 Upright Rod, with attached Clamp Assembly, Mounting Screw and Lock washer ASSEMBLY 1. Remove the base assembly from the carton. 2. Remove the screw and washer from the upright rod. Place the rod and clamp assembly into the hole in the top of the base. NOTE: The “Front” designation on the clamp assembly should face the opening of the legs, i.e.
Appendix I - DVE-50A Probe Clip Probe Clip DVE-50A is supplied with the DV1 Optional Temperature Probe. It is used to attach the RTD temperature probe to the LV/RV Guard Leg or 600mL low form Griffin beaker. Figure I-1 is a view of the Probe Clip, showing the hole into which the RTD probe is inserted, and the slot which fits onto the LV/RV guard leg. When inserting the RTD probe into the Probe Clip, the upper part of the Clip is compressed by squeezing the points shown in Figure I-1.
Appendix J - Fault Diagnosis and Troubleshooting Spindle Does Not Rotate ❏ ❏ ❏ ❏ Make sure the viscometer is plugged in. Check the voltage rating on your viscometer (115V, 220V): it must match wall voltage. Make sure the power switch is in the ON position. Verify rpm: make sure rotational speed (RPM) has been correctly selected. Spindle Wobbles When Rotating or Looks Bent ❏ Make sure the spindle is tightened securely to the viscometer coupling.
Appendix K - Online Help and Additional Resources www.brookfieldengineering.com** The Brookfield website is a good resource for additional information and self-help whenever you need it. Our website offers a selection of “how to” videos, application notes, conversion tables, instruction manuals, material safety data sheets, calibration templates and other technical resources. http://www.youtube.com/user/BrookfieldEng Brookfield has its own YouTube channel.
Appendix L - Warranty Repair and Service Warranty Brookfield Viscometers are guaranteed for one year from date of purchase against defects in materials and workmanship. They are certified against primary viscosity standards traceable to the National Institute of Standards and Technology (NIST). The Viscometer must be returned to Brookfield Engineering Laboratories, Inc. or the Brookfield dealer from whom it was purchased for a warranty evaluation. Transportation is at the purchaser’s expense.
Viscosity Test Report
