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Brookfield Engineering Laboratories, Inc. Manual No. M/92-021-N0902

BROOKFIELD DIGITAL VISCOMETER

MODEL DV-I+

Operating Instructions

Manual No. M/92-021-N0902

Please record the Model and Serial Number of your viscometer.Having this information readily available will help us to assist youshould there be any questions regarding your instrument.

Model No.

Serial No.

SPECIALISTS IN THE

MEASUREMENT AND

CONTROL OF VISCOSITY

TEL 800-628-8139 or 508-946-6200 FAX 508-946-6262www.brookfieldengineering.com

BROOKFIELD ENGINEERING LABORATORIES, INC.11 Commerce Boulevard, Middleboro, MA 02346-1031 USA


TABLE OF CONTENTS

I. INTRODUCTION ....................................................................................... 3 I.1 Components ..................................................................................................................... 4 I.2 Utilities ............................................................................................................................ 4 I.3 Specifications .................................................................................................................. 5 I.4 Set-Up .............................................................................................................................. 5 I.5 Safety Symbols and Precautions ..................................................................................... 6 I.6 Key Functions .................................................................................................................. 7 I.7 Cleaning ........................................................................................................................... 8

II. GETTING STARTED ................................................................................. 9 II.1 Auto Zero ......................................................................................................................... 9 II.2 Spindle Selection ........................................................................................................... 10 II.3 Speed Selection & Setting ............................................................................................. 12 II.4 Autorange ...................................................................................................................... 13 II.5 CGS or SI Units Selection ............................................................................................. 13 II.6 Temperature Display in °F or °C Selection ................................................................... 14 II.7 Out of Range .................................................................................................................. 14 II.8 Operation ....................................................................................................................... 15 II.9 Timed Modes for Viscosity Measurement (available in instruments with V3.0 or greater) .............................15

Appendix A - Cone/Plate Viscometer Set-Up .............................................................................. 20 Appendix B - Viscosity Ranges ................................................................................................... 24 Appendix C - Variables in Viscosity Measurement ..................................................................... 28 Appendix D - Spindle and Model Codes ..................................................................................... 30 Appendix E - Calibration Procedures .......................................................................................... 32 Appendix F - Special Speed Sets ................................................................................................. 39 Appendix G - Communications .................................................................................................... 40 Appendix H - Laboratory Stand with Parts Identification ........................................................... 41 Appendix I - DVE-50 Probe Clip ............................................................................................... 45 Appendix J - Fault Diagnosis and Troubleshooting .................................................................... 46 Appendix K - Warranty Repair and Service ................................................................................. 48 Appendix L - Viscosity Test Report ............................................................................................. 51


I. INTRODUCTION

The Brookfield DV-I+ Viscometer measures fluid viscosity at given shear rates. Viscosity is ameasure of a fluid’s resistance to flow. You will find a detailed description of the mathematics ofviscosity in the Brookfield publication “More Solutions to Sticky Problems” a copy of whichwas included with your DV-I+.

The principle of operation of the DV-I+ is to drive 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 thespring deflection. Spring deflection is measured with a rotary transducer. The measurementrange of a DV-I+ (in centipoise or milliPascal seconds) is determined by the rotational speed ofthe spindle, the size and shape of the spindle, the container the spindle is rotating in, and the fullscale torque of the calibrated spring.

There are four basic spring torque series offered by Brookfield:

Spring TorqueModel dyne-cm milli Newton-m

LVDV-I+ 673.7 0.0673RVDV-I+ 7,187.0 0.7187HADV-I+ 14,374.0 1.4374HBDV-I+ 57,496.0 5.7496

The higher the torque calibration, the higher the measurement range. The viscosity measurementrange for each torque calibration may be found in Appendix B.

All units of measurement are displayed according to either the CGS system or the SI sys-tem.

1. Viscosity appears in units of centipoise (shown as “cP”) or milliPascal-seconds (shown asmPa•s) on the DV-I+ Viscometer display.

2. Torque appears in units of dyne-centimeters or Newton-meters (shown as percent “%”) inboth cases) on the DV-I+ Viscometer display.

The equivalent units of measurement in the SI system are calculated using the following conver-sions:

SI CGSViscosity: 1 mPa•s = 1 cPTorque: 1 Newton-m = 107 dyne-cm

References to viscosity throughout this manual are done in CGS units. The DV-I+ Viscometerprovides equivalent information in SI units.


I.1 Components

Component Part Number Quantity

DV-I+ Viscometer varies 1Model S Laboratory Stand Model S 1Spindle Set with Case varies 1

LVDV-I+ set of four spindles or (SSL) 1RVDV-I+ set of six spindles (#2 through #7) (SSR) 1HA/HBDV-I+ set of six spindles (#2 through #7) (SSH) 1

For cone/plate versions, a spindle wrench, one cone spindle and sample cup,Part No. CPE-44Y replace the spindle set.

Shipping Cap B-30-2 1Power Cord DVP-65 1Guardleg (not supplied with Cone/Plate versions)

LVDV-I+ or B-20Y 1RVDV-I+ B-21Y 1

Carrying Case DVE-7Y 1

The following applies to DV-I+ Viscometers with the temperature probe option.Look for this symbol throughout this manual for instructions pertainingspecifically to DV-I+ Viscometers with temperature probe option.

RTD Temperature Probe DVP-94Y 1Probe Clip DVE-50 1

Please check to be sure that you have received all components and thatthere is no damage. If you are missing any parts, please notify BrookfieldEngineering or your local Brookfield agent immediately. Any shippingdamage must be reported to the carrier.

Tp

I.2 Utilities

Input Voltage: 115 VAC or 230 VACInput Frequency: 50/60 HzPower Consumption: Less than 20 WATTS

Power Cord Color Code:United States Outside United States

Hot (live) Black BrownNeutral White BlueGround (earth) Green Green/Yellow


I.3 Specifications

Speeds: LVDV-I+: 0.0, 0.3, 0.6, 1.5, 3, 6, 12, 30, 60, 0.0, (rpm) 0.5, 1, 2, 2.5, 4, 5, 10, 20, 50, 100

RV/HA/HBDV-I+: 0.0, 0.5, 1, 2, 2.5, 4, 5, 10, 20, 50, 100,0.0, 0.3, 0.6, 1.5, 3, 6, 12, 30, 60

Weight: Gross Weight 20 lb 9 kgNet Weight 17 lb 7.7 kgCarton Volume 1.65 cu ft 0.05 m3

Tp Temperature Sensing Range: -100°C to +300°C (-148°F to +572°F)

Operating Environment: 0°C to 40°C Temperature Range (32°F to 104°F)20% - 80% R.H.: non-condensing atmosphere

Analog Torque Output: 0 - 1 Volt DC (0 - 100% Torque)

Tp Analog Temperature Output: 0-4 Volt DC (10 mV/°C)

Viscosity Accuracy: ±1% Full Scale Range in Use (See Appendix E for details)

Viscosity Repeatability: 0.2% of Full Scale Range in Use

Tp Temperature Accuracy: ±1°C: -100°C to +149°C±2°C: +150°C to +300°C

Electrical Certifications:Conforms to CE Standards: BSEN 50081-1: Emission Standard - Light Industrial

BSEN 50082-1: Immunity Standard - Light IndustrialBSEN 50081-2: Emission Standard - IndustrialBSEN 50082-2: Immunity Standard - IndustrialBSEN 61010-1: Safety requirements for electrical

equipment, for measurement, controland laboratory use

Approved Standards: CSA Std. C22.2 No. 151-M1986 - Laboratory EquipmentCSA Class 8721 01 - Laboratory Equipment

Installation Category (over-voltage category) II: Classification of parts of installationsystems or circuits in local level, portable equipment, appliances, etc.

I.4 Set-Up

1) To assemble the Model S Laboratory Stand, place the upright rod into the base (referto assembly instructions in Appendix H). The rack gear and clamp assembly shouldface the front of the base. The upright rod is held in place with the jam nut which isattached from the bottom of the base. Tighten this nut with a suitable wrench(spanner). Attach leveling feet.

2) Insert the mounting rod on the back of the DV-I+ Viscometer into the hole on theclamp assembly. Be sure that the clamp screw, VS-41Y, is loose.


3) Tighten the VS-41Y clamp screw. Adjust the Viscometer to be as close to level aspossible while tightening the clamp screw.

Tp 4) Connect the RTD temperature probe to the temperature port on the rear panelof the DV-I+.

5) The Viscometer must be leveled. The level is adjusted using the three leveling screwson the base. Adjust so that the bubble level on top of the DV-I+ is centered withinthe circle. Check level periodically during use.

6) Make sure that the AC power switch at the rear of the DV-I+ is in the OFF position.Connect the power cord to the socket on the back panel of the instrument and plug itinto the appropriate AC line.

The AC input voltage and frequency must be within the appropriate range as shownon the name plate of the viscometer. The DV-I+ must be earth grounded to ensureagainst electronic failure!

7) For Cone/Plate models, refer to Appendix A.

I.5 Safety Symbols and Precautions

Safety SymbolsThe following explains safety symbols which may be found in this operating manual.

Indicates hazardous voltages may be present.

Refer to the manual for specific warning or caution information to avoid personal injury

or damage to the instrument.

Precautions

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 electrical cord fromthe 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 thetesting.


SETSPEED

SELECTSPINDLESELECTSPINDLE

MOTORON/OFF

AUTORANGE

I.6 Key Functions

Figure I-1 shows the control keys on the face of the DV-I+ Viscometer. The following describes eachkey's function.

UP ARROW

This key is used to scroll UP (in an increasingvalue direction) through the available speed orspindle tables.

DOWN ARROW

This key is used to scroll DOWN (in a decreasingvalue direction) through the available speed orspindle tables.

Tp Note: Pressing and holding the DOWN ARROW keyduring the POWER ON will enable thetemperature display to be read in °C or °F.See Section II.1.

MOTORON/OFF MOTOR ON/OFF

Turns the motor ON or OFF.

SETSPEED SET SPEED

Causes the DV-I+ to begin running at the currently selected speed. Used for Time to Torqueand Timed Stop tests. (See Section II.9 - Timed Modes for Viscosity Measurement.)

AUTORANGE AUTO RANGE

Presents the maximum (100% torque) viscosity attainable (known as full scale range) for thespindle speed selected. This feature is functional when the motor is running. Viscometerallowable error is 1% of the maximum (100% torque) viscosity value.

Note: Pressing and holding the AUTO RANGE key during power on will enable theviscosity display to be changed between CGS and SI units (see Section II.5).

SELECTSPINDLESELECTSPINDLE SELECT SPINDLE

Initiates spindle selection on the first press and then selects the currently scrolled-to spindlewhen pressed a second time. Used for Time to Torque and Timed Stop tests. (See SectionII.9 - Timed Modes for Viscosity Measurement.)

Figure I-1


I.7 Cleaning

Be sure to remove spindle from instrument prior to cleaning. Severe instrumentdamage may result if cleaned in place.

Instrument and Keypad: Clean with dry, non-abrasive cloth. Do not use solventsor cleaners.

Immersed Components (spindles): Spindles are made of stainless steel. Clean with non-abra-sive cloth and solvent appropriate for sample material thatis not aggressive to immersed components.

When cleaning, do not apply excessive force which may result in bending spindles.


II. GETTING STARTED

II.1 Auto Zero

Before readings may be taken, the Viscometer must be Autozeroed. This action is performedeach time the power switch is turned on. The display window on the Viscometer will guide youthrough the procedure as follows:

Turn the power switch (located on the rear panel) to the ON position. This will result in thefollowing screen display:

BROOKFIELD DV-I+RV VISCOMETER

Figure II-1

After a few seconds, the following screen appears:

BROOKFIELD DV-I+ VERSION 5.0

Figure II-2

No key press is required at this point. After a short time, the display will clear and the followingwill be displayed:

REMOVE SPINDLE PRESS ANY KEY

Figure II-3

After removing the spindle and pressing any key, the DV-I+ begins its Autozero. The screen willflash “Autozeroing”. Note: Be sure that the viscometer is level before initiating Autozero.

After approximately 15 seconds, the flashing stops and the following screen appears:

REPLACE SPINDLE PRESS ANY KEY

Figure II-4

Pressing any key at this point results in the display of the DV-I+ default screen:


cP 123E3 70.1°F0.0RPM % 0.0

cP 0.0 S010.0RPM % 0.0

(with Temperature Probe)

(without Temperature Probe)

Calculated Viscosity (cP or m•Pas)

Speed

Temperature (if available)

% Torque

Spindle Selected

Figure II-5

The display will vary slightly depending upon the status of the last spindle entry.

NOTE: If the viscosity value exceeds 99,999, scientific notation is used. In FigureII-5, theviscosity value is 123,000 cP.

II.2 Spindle Selection

LVDV-I+ Viscometers are provided with a set of four spindles and a narrow guardleg; RVDV-I+Viscometers come with a set of six spindles and a wider guardleg; HADV-I+ and HBDV-I+Viscometers come with a set of six spindles and no guardleg. (See Appendix E for more informa-tion on the guardleg.)

The spindles are attached to the viscometer by screwing them to the lower shaft. Note that thespindles have a left-hand thread. The lower shaft should be held in one hand and lifted up. Thespindles should be screwed to the left. The face of the spindle nut and the matching surface on thelower shaft should be smooth and clean to prevent eccentric rotation of the spindle. Spindles canbe identified by the number on the side of the spindle nut.

The DV-I+ requires a Spindle Entry Code number to calculate viscosity values. The two digitentry code for each spindle may be found in Appendix D.

NOTE: The DV-I+ will remember the Spindle Entry Code which was in use when powerwas turned off.

II.2.1 Spindle Selection for Models WITHOUT Temperature Display

Pressing the SELECT SPINDLE key will cause the characters on the top line of the display tobegin to blink . It will blink for about three seconds. If the UP or DOWN ARROW keys are pressed(while SSSSS is blinking) the two character spindle value to the right of the SSSSS character will begin tochange (in either an increasing or decreasing direction depending upon which ARROW key ispressed) for each press of the key. If the ARROW key is pressed and held, the display will scrollthrough the spindle codes for as long as the ARROW key is depressed. When it reaches the lastitem in the list (either at the top or bottom of the list) the spindle code displayed will “roll-over”to either the first or last spindle code and the scroll action will continue.

When the desired spindle code is displayed, release the ARROW key to halt further scrolling.Press the SELECT SPINDLE key once again. This will cause the SSSSS character to cease blinking andthe new spindle code will be accepted for use in viscometer calculations.


NOTE: You have approximately three seconds in which to press the SELECT SPINDLEkey before the blinking stops. If you fail to press the SELECT SPINDLE keybefore the blinking stops you will have to repeat the above steps and re-select thedesired spindle.

The DV-I+ will begin to calculate using the new spindle parameters as soon as the SELECTSPINDLE key is pressed the second time.

Tp II.2.2 Spindle Section for Models WITH Temperature Display

The steps for selecting and accepting a spindle entry are the same as Section II.2.1 except thatwhen SELECT SPINDLE is depressed, the temperature display is temporarily replaced by the spindleentry code until the entry code is accepted (Figure II-6):

cP 123.4 SP3110 RPM % 89.7

Figure II-6

Once the spindle entry code is accepted, the screen will return to the default display:

cP 0.0 70.1°F0.0RPM % 0.0

Figure II-7

The DV-I+ may also be programmed at Brookfield Engineering for “special” user spindles.These “special” spindles will show up on the spindle scroll list starting with the designation "AA"and continuing through "AZ". Contact Brookfield Engineering regarding your needs for specialspindles.


II.3 Speed Selection & Setting

Table II-1 shows the available speed selections.

DV-I+ SPEEDS SETS

LV RV/HA/HB

0.0 0.00.3 0.50.6 1.01.5 2.03.0 2.56.0 4.0

12.0 5.030.0 10.060.0 20.00.0 50.00.5 100.01.0 0.02.0 0.32.5 0.64.0 1.55.0 3.0

10.0 6.020.0 12.050.0 30.0

100.0 60.0

Beginning

When scrolling“UP”

Beginning

When scrolling“UP”

Table II-1

The DV-I+ may also be programmed with “special” speed sets. A list of special speed sets isincluded in Appendix F. Please consult Brookfield Engineering or your local dealer/distributorfor any special speed requirements not addressed by the standard or special speed sets.

To select a viscometer speed first press either the UP or DOWN ARROW keys which will cause thearea to the right of RPM (on the bottom line) to display the currently selected speed. Figure II-8 shows the DV-I+ had been operating at 10 RPM, and the current selected speed is 10 RPM.

cP 872.0 S01 10RPM10 % 87.2 Flashing “Selectable” SpeedOperating Speed

Figure II-8

If the ARROW key is pressed just once and then released, the characters RPMRPMRPMRPMRPM will blink for threeseconds, then will cease blinking resulting in no change to the speed entry.

NOTE: The speed selection process remembers the last value of scrolled-to speed so thatthe next time you initiate a speed change (by pressing an ARROW key), the DV-I+ will begin its scroll display from the last entered value.

The last-scrolled-to speed does not necessarily have to be the same as the speed at which the


DV-I+ is currently running. The user may operate at a given speed and pre-set the DV-I+ to thenext desired speed before that speed will be used. For example, if the DV-I+ is currently runningat 10 RPM and was previously scrolled to 20 RPM, a single press of either ARROW key wouldresult in the Figure II-9 screen display:

cP 872.0 S01 10RPM20 % 87.2Operating Speed Scrolled to Selected Speed

Figure II-9

Pressing the SET SPEED key would cause the DV-I+ to begin running at 20 RPM.

Pressing the MOTOR ON/OFF again immediately starts the DV-I+ running at the last scrolled-to-speed. If you had been running at 10 RPM, pressed MOTOR ON/OFF and then re-started the DV-I+ by pressing MOTOR ON/OFF once again, you would again be running at 10 RPM. However, ifwhile the motor was off you had scrolled to a new speed of 20 RPM, pressing the MOTOR ON/OFFkey would start the DV-I+ running at 20 RPM.

NOTE: During both spindle or speed selection and scrolling operations, the DV-I+ willcontinue to calculate and display viscosity (cP) and torque (%).

II.4 Autorange

The AUTO RANGE key allows you to determine the maximum calculated viscosity (full scalereading) possible with the current spindle/speed setting. Pressing the key at any time will causethe current viscosity display to change and show that maximum viscosity. The screen torquedisplay will now display a flashing “%100.0” to indicate this special condition. This maximumviscosity and flashing %100.0 value will be displayed for as long as the AUTO RANGE key isdepressed. Figure II-10 shows the AUTO RANGE function for the situation where the No. 1 RVspindle is rotating at 10 RPM. The full scale range is 1000 cP (or 1000 mPa.s).

NOTE: If the motor is off or the RPM is 0.0, the maximum viscosity displayed will be 0.0cP (or 0.0 mPa.s).

cP 1000 S01 10RPM %100.0

Figure II-10

II.5 CGS or SI Units Selection

Pressing and holding the AUTO RANGE key during power on will enable the viscosity display tobe read in either CGS or 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-I+ will retain the unit selection when the viscometer is turned OFF.


CGS SIViscosity cP mPa.s

DV-I+ Viscometers without this function can be updated. Contact Brookfield or your localBrookfield dealer for this service.

II.6 Temperature Display in °F or °C Selection

Pressing and holding the DOWN ARROW key during power on will enable the temperature displayto be read in either degrees Fahrenheit or degrees Centigrade. To change the units format:

1. Turn the power OFF.2. Press and hold the DOWN ARROW key and turn power ON.

The DV-I+ will retain the unit selection when the viscometer is turned OFF.

The following screen depicts the changes to the default screen when displaying temperature inthe Fahrenheit scale and viscosity display in SI units:

mPas123.4 70.1°F 10 RPM % 89.7

Figure II-11

II.7 Out of Range

Brookfield recommends taking viscosity readings between 10% and 100% of scale. The DV-I+gives indications for out of specification or out-of-range operation. When % (Torque) readingsexceed 100.0 % (over-range), the display changes to that shown in Figure II-12:

cP EEEE S0110 RPM % EEEE

Figure II-12

You must change either speed or spindle to correct this condition. If you operate at spindlespeeds that produce % (Torque) below 10.0 % (under-range), the DV-I+ displays both % (Torque)and cP (Viscosity) preceded by a “?” as shown in Figure II-13:

cP? 78.0 S01 10RPM20 % ?7.8

Figure II-13

Negative % (Torque) will be displayed as shown in Figure II-14:

cP ---- S01 10RPM20 % -0.2

Figure II-14

Viscosity values will be displayed as “- - - -” when the % (Torque) is below zero.


II.8 Operation

The following procedure is outlined for making a viscosity measurement in a 600 ml low formGriffin beaker.

1. Mount the guardleg on the DV-I+ Viscometer (LV and RV series). Attach the spindle tothe lower shaft. Lift the shaft slightly, holding it firmly with one hand while screwing thespindle on with the other (note left-hand thread). Avoid putting side thrust on the shaft.

2. Insert and center spindle in the test material until the fluid's level is at the immersion groovein the spindle's shaft. With a disc-type spindle, it is sometimes necessary to tilt the spindleslightly while immersing to avoid trapping air bubbles on its surface. (You may find it moreconvenient to immerse the spindle in this fashion before attaching it to the Viscometer.)

3. To make a viscosity measurement, select the desired speed setting. Allow time for theindicated reading to stabilize. The time required for stabilization will depend on the speedat which the Viscometer is running and the characteristics of the sample fluid. Formaximum accuracy, readings below 10% should be avoided. Additional information onmaking viscosity measurements is available in Appendix C or the Brookfield publication“More Solutions to Sticky Problems”.

4. Press the MOTOR ON/OFF key to turn the motor “OFF” when changing a spindle orchanging samples. Remove spindle before cleaning. Clean spindles after use.

5. Interpretation of results and the instrument's use with non-Newtonian and thixotropicmaterials is discussed in the booklet, “More Solutions to Sticky Problems”, and inAppendix C, Variables in Viscosity Measurements.

II.9 Timed Modes for Viscosity Measurement (available in instruments with V3.0 or greater)

The Timed Modes allow the viscometer user to implement Timed Stop and Time to Torquecapabilities with the DV-I+ Viscometer. This feature will allow the user to set up the viscometer(i.e. select spindle and speed) and then record readings for a fixed period of time (Timed Stop) oruntil a set torque value is attained (Time to Torque). A series of menus will ask the user to inputminutes and seconds (Timed Stop) or % torque (Time to Torque) and will then begin timing whenthe user presses the MOTOR ON/OFF key to ON. A message will be displayed showing timeremaining (or time elapsed) and the appropriate display item (viscosity or torque) will be updatedcontinuously during the event. Upon completion, the viscometer will display a screen stating thatthe test is complete and will also display the final recorded value for the viscosity in the first case,and the time in minutes and seconds to reach the torque limit in the second case. Pressing the UPor DOWN arrow keys will allow alternate data to be examined and pressing any other key willbring the user back to the default (normal) viscometer display with the motor OFF. If the userwishes to run another test, repeat the above steps.

II.9.1 Set Up

1. The user must pre-select the display unit option: CGS or SI.

2. The user then selects (via the UP and DOWN arrows) the spindle speed.

NOTE: If 0.0 RPM is the selected speed setting (the default after executing AUTOZERO)the timed modes can be executed; however, the results will be meaninglessshowing no viscosity values.


3. Next, the user selects the spindle number corresponding to the spindle attached.

4. Now, the user presses the MOTOR ON/OFF key to ensure that the motor is OFF. Setting themotor to the OFF condition sets up the viscometer for executing the Timed Modes.

5. The user presses the SET SPEED and SELECT SPINDLE keys simultaneously to enter eitherof the timed test modes. Immediately, the following screen appears:

TIMED STOP TIME TO TORQUE

Figure II-15

The user presses either the UP or DOWN ARROW key to select the test method of choice and isimmediately presented with the corresponding opening screen.

II.9.2 Timed Stop

1. After pressing the UP ARROW key when in the display of Figure II-16, the user is presentedwith the following screen:

TIMED STOP SET MIN’S: 00

Figure II-16

Using the UP and DOWN ARROW keys, the user enters a value for the minutes portion ofthe time to stop. This value can be as high as 99 minutes.

2. When satisfied, the user presses the SELECT SPINDLE key again to enter the seconds settingdisplay:

TIMED STOP SET SEC’S: 00

Figure II-17

Using the UP and DOWN ARROW keys, the user enters a value for the seconds portion ofthe time to stop. This value will be between 0 and 59 seconds.

NOTE: The value for minutes or seconds must be other than zero or you will not be ableto exit this mode.

The user presses the SELECT SPINDLE key one more time at which point the viscometer willdisplay the following screen:

TIMED STOP:PRESS MOTOR ON OFF/

Figure II-18


3. At this point, the user need only press the MOTOR ON/OFF key to begin the timed stopoperation. Any other key will abort the process and the user will have to begin again bysimultaneously pressing the SET SPEED and SELECT SPINDLE keys.

4. We will assume that the user pressed the MOTOR ON/OFF key to ON and is now presentedwith the following screen for the duration of the timed run:

cP 123456789MIN: 15 SEC:13

Figure II-19

NOTE: When this mode has begun, a press of the MOTOR ON/OFF key will interruptthe Timed Stop sequence and return the user to normal operation.

The seconds display will decrement from 59 to zero (0) in one (1) second intervals. Whenseconds reaches zero (0), the minutes value will decrement by one (1) minute. This willcontinue until all of the time has elapsed at which point the viscometer will display thefollowing screen:

cP 123456789TIMED STOP DONE

Figure II-20

At this point, the viscometer will stop the motor and continue to display this screen untilthe user presses the UP or DOWN ARROW keys to view the Torque and Speed that werecurrent at the Timed Stop completion. This display would appear as follows:

%=76.4 RPM=100TIMED STOP DONE

Figure II-21

The display will switch between that of Figures II-20 and II-21 for each press of either theUP or DOWN ARROW key. Pressing any key except the UP or DOWN ARROW keys will causethe viscometer to exit the Timed Stop mode and resume normal operation.

NOTE: For the Timed Stop method, the DV-I+ Viscometer will retain the last value for thetime interval in EEPROM so that it will become the default the next time the userelects to use this method.

II.9.3 Time to Torque

1. After pressing the DOWN ARROW key when in the display of Figure II-15, the user ispresented with the following screen:


TIMED TORQUESET TORQUE: 00%

Figure II-22

Using the UP and DOWN ARROW keys, the user enters a value for the torque level whichthe viscometer must achieve. This value can be as high as 99%.

NOTE: The value for torque must be other than zero or you will not be ableto exit this mode.

2. The user presses the SELECT SPINDLE key one more time to end the torque input at whichpoint the viscometer will display the following screen:

TIMED TORQ:PRESS MOTOR ON OFF/

Figure II-23

The time to torque value can be as high as 99 minutes and 59 seconds.

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 the user will have to begin again bysimultaneously pressing the SET SPEED and SELECT SPINDLE keys.

4. We will assume that the user pressed the MOTOR ON/OFF key to ON and is now presentedwith the following display for the duration of the timed torque run:

TORQUE = 24.2%MIN: 15 SEC: 13

Figure II-24

NOTE: When this mode has begun, a press of the MOTOR ON/OFF key will interrupt thetime to torque operation and return the user to normal operation.

The seconds display will increment from zero (0) to 59 in one (1) second intervals and thecurrent value of the viscometer torque will be updated continuously. When seconds reach59, the minutes value will increment by one (1) minute. This will continue until the userselected torque value is attained at which point the viscometer will display the followingscreen:

22M 54S TO 85%TIMED TORQ DONE

Figure II-25

At this point, the viscometer will stop the motor and continue to display this screen untilthe user presses the UP or DOWN ARROW keys to view the viscosity that was current at theTimed Torque completion. The display would appear as follows:


CP 123456789TIMED TORQ DONE

Figure II-26

The display will switch between that of Figures II-25 and II-26 for each press of either theUP or DOWN ARROW key. Pressing any key except the UP or DOWN ARROW key will causethe viscometer to exit the Timed Torque mode and resume normal operation.

NOTE: For the Time to Torque method, the DV-I+ Viscometer will retain the last enteredtorque in EEPROM for use when the user elects to perform a time to torque testagain.


Appendix A - Cone/Plate Viscometer Set-Up

This Cone/Plate version of the DV-I+ uses the same operating instruction procedures as describedin this manual. However, the “gap” between the cone and the plate must be verified/adjustedbefore measurements are made. This is done by moving the plate (built into the sample cup) uptowards the cone until the pin in the center of the cone touches the surface of the plate, and thenby separating (lowering) the plate 0.0005 inch (0.013mm).

DV-I+ Cone/Plate Viscometers, S/N 50969 and higher, have an Electronic Gap Setting feature.This feature enables the user to easily find the 0.0005 inch gap setting that was established atBrookfield prior to shipment.

The following information explains how to set the Electronic Gap and verify calibration of theDV-I+ Viscometer.

A.1 ELECTRONIC GAP SETTING FEATURES

TOGGLE SWITCH allows you to enable/disablethe Electronic Gap Setting Feature: left posi-tion is OFF (disabled), right position is ON (en-abled).

PILOT LIGHT is the red (LED) light; when illu-minated, it means the Electronic Setting Func-tion is sensing (enabled).

CONTACT LIGHT is the yellow (LED) light; whenit first turns on, the “hit point” has been found.

SLIDING REFERENCE MARKER is used afterfinding the “hit point;” it is the reference for es-tablishing the 0.0005 inch gap.

MICROMETER ADJUSTMENT RING is used tomove the cup up or down in relation to the conespindle. Turning the ring left (clockwise) low-ers the cup; turning it right (counterclockwise)raises the cup. Each line on the ring representsone scale division and is equivalent to 0.0005inch movement of the plate relative to the cone.

Pilot Light(red)

Toggle Swtich

Contact Light(yellow)

Sliding ReferenceMarker

MicrometerAdjustment Ring

Figure A-1


Bath/Circulator

BathInlet

BathOutlet

SampleCup

(CPE-44Yor

CPE-44P)

CupOutlet

CupInlet

Figure A-2

Figure A-3

SpindleWrench

(CPE) Cone

These surfacesmust be clean!

Coupling Nut

MicrometerAdjustment

Ring

Do Not hit theCONE with the CUP!

Figure A-4

A.2 SETUP

1. Be sure that the Viscometer is securelymounted to the Laboratory Stand, leveled andzeroed 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 tothe water bath inlet and outlet and set the bathto the desired test temperature. Allow suffi-cient time for the bath to reach the test tem-perature.

3. The Viscometer has been supplied with aspecial cone spindle(s) which contains theElectronic Gap Setting feature. The “CPE”part number designation on the cone verifiesthe Electronic Gap Setting feature. Note: The“CPE” cone or cup cannot be used with earlierDV-I+ cone/plate Viscometers (below S/N50969) which do not have the electronic gapsetting feature.

4. With the motor off, thread the cone spindle byusing the spindle wrench to secure the vis-cometer coupling nut (see Figure A-3); gen-tly push up on the coupling nut and hold thissecurely with the wrench. Thread the conespindle by hand. Note: Left Hand Threads.

5. Attach the cup, taking care not to hit the conewith the cup (Figure A-4). There must be nofluid in the cup.

The viscosity of electrically conductive fluidsmay be affected if readings are taken with theElectronic Gap Setting feature “on”. Be sureto shut the feature “off” before taking readings!


A.3 SETTING THE GAP

1. Move the toggle switch to the right; this willturn on (enable) the Gap Setting Feature. ThePilot (red) light will be illuminated.

2. If the contact light (yellow) is illuminated,turn the micrometer adjustment ring clock-wise (as you look down on the instrument)until the light is just breaking contact, i.e.,flickering (see Figure A-5).

3. If the yellow contact light is not illuminated,slowly turn the micrometer adjustment ring insmall increments (one or two scale divisions)counter-clockwise.

Continue moving the micrometer adjustmentring slowly counter-clockwise until the con-tact light (yellow) turns on. Back off (rotateclockwise) until the light is just breakingcontact, i.e., flickering.

4. Adjust the sliding reference marker, right orleft, to the closest full scale division mark (seeFigure A-6).

5. Turn the micrometer adjustment ring one scaledivision to the left to meet the line on thesliding reference marker. THE YELLOWCONTACT LIGHT SHOULD GO OFF.

6. You have established the gap space needed formeasurement. Now turn the toggle switchOFF (left); the red pilot light should go off.

7. Carefully remove the sample cup.

Moves Awayfrom Hit Point

(clockwise) LEFTx

Moves Towards Hit Point

(counter-clockwise) RIGHT

Full Scale Division Marks

SlidingReference

Marker

Figure A-5

Figure A-6

Notes1. The cup may be removed and replaced without resetting the gap if the micrometer adjustment

ring has not been moved.2. Remove the spindle from the viscometer when cleaning.3. Re-establish the hit point every time the spindle is attached/detached.


C o n e S a m p l e Vo l u m eP a r t N o .

C P E - 4 0 0 . 5 m lC P E - 4 1 2 . 0 m lC P E - 4 2 1 . 0 m lC P E - 5 1 0 . 5 m lC P E - 5 2 0 . 5 m l

Ta b l e A 6

Table A-1

4. Attach the sample cup to the Viscom-eter and allow sufficient time for thesample, cup and cone to reach tem-perature equilibrium.

5. Turn the motor on. Set the desiredspeed(s). Measure the viscosity andrecord the reading in both % torqueand centipoise (cP).

NOTE: The cone spindle must rotateat least five (5) times before a visco-sity reading is taken.

6. Verify that the viscosity reading iswithin the allowable 1% deviation, asexplained earlier, for the specific vis-cosity standard fluid(s) that you areusing.

* The CPE designation on the conespindle indicates use with ElectronicGap Setting Cone/Plate Viscometers/Rheometers only.

A.4 VERIFYING CALIBRATION

1. Determine the appropriate sample volume.Refer to Table A-1 to determine the correctsample volume required for the spindle to beutilized.

2. Select a Brookfield Viscosity Standard fluidthat will give viscosity readings between 10%and 100% of full scale range. Refer to Ap-pendix B for viscosity ranges of cone spindles;ranges listed apply to CPE cones.

Do not use a silicone viscosity standard fluidwith a viscosity value greater than 5000 cPwith a Cone/Plate. Brookfield offers a com-plete range of mineral oil viscosity standardssuitable for use with Cone/Plates for viscosi-ties above 5,000 cP or shear rates above 500sec-1; see Table E1 in Appendix E for a list ofavailable fluids.

It is best to use a viscosity standard fluid thatwill be close to the maximum viscosity for agiven cone spindle/speed combination.

Example: LVDV-I+ Viscometer, ConeSpindle CPE-42, BrookfieldSilicone Viscosity Standardhaving a viscosity of 9.7 cP at25°C.

At 60 RPM, the full scale viscosity range is10.0 cP. Thus, the Viscometer reading shouldbe 97% torque and 9.7 cP viscosity ± 0.197(closer to ±0.2) cP. The accuracy is a combi-nation of Viscometer and fluid tolerance (re-fer to Interpretation of Calibration TestResults in Appendix E).

3. With the motor off, remove the sample cupand place the viscosity standard fluid into thecup.


Appendix B - Viscosity Ranges

LV(#1-4) and RV,HA,HB(#1-7) Viscometers

Viscometer Minimum Maximum

LVDV-I+ 15 2,000,000RVDV-I+ 100 13,300,000HADV-I+ 200 26,600,000HBDV-I+ 800 106,400,000

Viscosity Range (cP)

Vane Spindles

V-71 RV .5-5 5-50 262 - 2620V-72 RV 2-20 20-200 1110 - 11100V-73 RV 10-100 100-1000 5350 - 53500

V-71 HA 1-10 10-100 524 - 5240V-72 HA 4-40 40-400 2220 - 22200V-73 HA 20-200 200-2000 10700 - 107000

V-71 HB 4-40 40-400 2096 - 20960V-72 HB 16-160 160-1600 8880 - 88800V-73 HB 80-800 800-8000 42800 - 428000

V-71 5xHB 20-200 200-2000 10480 - 104800V-72 5xHB 80-800 800-8000 44400 - 444000V-73 5xHB 400-4000 4000-40000 214000 - 2140000

Spindle Torque Shear Stress Range Viscosity Range cPRange Pa dyne/cm (mPa•s) @ 10 rpm

Notes: 1) 1 Pa = 10 dyne/cm2) 1 cP = 1 mPa•s3) Possibility of turbulence at speeds above 10 rpm may give artificially higher viscosity readings.

2

2


Small Sample Adapter and Thermosel

SSA and Viscosity (cP) ShearThermosel Rate

Spindle RVDV-I+ HADV-I+ HBDV-I+ sec-1

SC4-14 1,250 - 4,165,000 2,500 - 8,330,000 10,000 - 33,360,000 .40NSC4-15 500 - 1,660,000 1,000 - 3,320,000 4,000 - 13,280,000 .48NSC4-25 0 - 167,000 100 - 334,000 400 - 1,336,000 .93NSC4-27 250 - 830,000 500 - 1,660,000 2,000 - 6,640,000 .34NSC4-28 500 - 1,660,000 1,000 - 3,320,000 4,000 - 13,280,000 .28NSC4-29 1,000 - 3,330,000 2,000 - 6,660,000 8,000 - 26,640,000 .25NSC4-81 37 - 10,000 73.0 - 10,000 292 - 10,000 1.29NSC4-82 37 - 10,000 73.0 - 10,000 292 - 10,000 1.29NSC4-83 121 - 50,000 243 - 50,000 970 - 50,000 1.29N

SC4-16 120 - 400,000 .29NSC4-18 3 - 10,000 1.32NSC4-25 480 - 1,600,000 .22NSC4-31 30 - 100,000 .34NSC4-34 60 - 200,000 .28NSC4-81 3 - 10,000 1.29NSC4-82 3 - 10,000 1.29NSC4-83 11 - 38,000 1.29N

SSA and Viscosity (cP) ShearThermosel Rate

Spindle LVDV-I+ sec-1

UL Adapter

ShearRate

UL Spindle LVDV-I+ RVDV-I+ HADV-I+ HBDV-I+ sec-1

YULA-15 or 15Z 1 - 2,000 7 - 2,000 13 - 2,000 52 - 2,000 1.22NULA-DIN-Y 1 - 3,800 11 - 5,000 22 - 5,000 85 - 2,000 1.29N

Viscosity (cP)

DIN Adapter Accessory

ShearRate

DAA Spindle LVDV-I+ RVDV-I+ HADV-I+ HBDV-I+ sec-1

85 2 - 4,000 12 - 5,000 24 - 5,000 98 - 5,000 1.22N86 4 - 3,800 37 - 10,000 73 - 10,000 292 - 10,000 1.29N87 11 - 38,000 121 - 50,000 243 - 50,000 970 - 50,000 1.29N

Viscosity (cP)


Spiral Adapter

ShearRate

Spiral Spindle LVDV-I+ RVDV-I+ HADV-I+ HBDV-I+ sec-1

SA-70 98 - 98,500 1,000-1,050,000 2,100-2,100,000 8,400-8,400,000 .00677 -.67.7N

(1-100 RPM)

Viscosity (cP)

Cone/Plate Viscometer

ShearRate

Cone Spindle LVDV-I+ RVDV-I+ HADV-I+ HBDV-I+ sec-1

CPE-40 .30 - 1,028 3 - 10,900 7 - 21,800 26 - 87,200 7.5NCPE-41 1.15 - 3,840 12 - 41,000 25 - 82,000 98 - 328,000 2.0NCPE-42 .60 - 2,000 6 - 21,300 13 - 42,600 51 - 170,400 3.84NCPE-51 4.8 - 16,178 51.8 - 172,600 103.4 - 345,200 414.2 - 1,380,800 3.84NCPE-52 9.3 - 31,000 99.2 - 330,733 198.4 - 661,466 793.6 - 2,645,866 2.0N

Viscosity (cP)

Helipath with T-Bar Spindles

T-Bar Spindle LVDV-I+ RVDV-I+ HADV-I+ HBDV-I+

T-A 156 - 62,400 2,000 - 400,000 4,000 - 800,000 16,000 - 3,200,000T-B 312 - 124,800 4,000 - 800,000 8,000 - 1,600,000 32,000 - 6,400,000T-C 780 - 312,000 10,000 - 2,000,000 20,000 - 4,000,000 80,000 - 16,000,000T-D 1,560 - 624,000 20,000 - 4,000,000 40,000 - 8,000,000 160,000 - 32,000,000T-E 3,900 -1,560,000 50,000 - 10,000,000 100,000 - 20,000,000 400,000 - 80,000,000T-F 7,800 -3,120,000 100,000 - 20,000,000 200,000 - 40,000,000 800,000 - 160,000,000

Viscosity (cP)

In taking viscosity measurements with the DV-I+ Viscometer there are two considerations whichpertain to the low viscosity limit of effective measurement.

1) Viscosity measurements should be accepted within the equivalent % Torque Range from10% to 100% for any combination of spindle/speed rotation.

2) Viscosity measurements should be taken under laminar flow conditions, not under turbu-lent flow conditions.

The first consideration has to do with the accuracy of the instrument. All DV-I+ Viscometershave a full scale range allowable error of (+/-) 1% of any spindle/speed in use. We discouragetaking readings below 10% of range because the potential viscosity error of (+/-) 1% is a rela-tively high number compared to the instrument reading.

The second consideration involves the mechanics of fluid flow. All rheological measurements offluid 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, thismeans all fluid movement must be circumferential. When the inertial forces on the fluid becometoo great, the fluid can break into turbulent flow wherein the movement of fluid particles be-comes random and the flow can not be analyzed with standard math models. This turbulencecreates a falsely high viscometer reading with the degree of non-linear increase in reading beingdirectly related to the degree of turbulence in the fluid.

For the following geometries, we have found that an approximate transition point to turbulentflow occurs:

1) No. 1 LV Spindle: 15 cP at 60 RPM2) No. 1 RV Spindle: 100 cP at 50 RPM3) UL Adapter: 0.85 cP at 60 RPM

Turbulent conditions will exist in these situations whenever the RPM/cP ratio exceeds the valueslisted above.


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 thetest fluid deal with the rheological properties of the fluid, while instrument variables would include theviscometer 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 (differentRPM’s) and are called Newtonian over the Shear Rate range they aremeasured.

Non-Newtonian - These fluids have different viscosities at different shear rates (differentRPM’s). They fall into two groups:

1) Time Independent2) Time Dependent

Time Independent means that the viscosity behavior does not change as a function of time whenmeasuring at a specific shear rate.

Pseudoplastic - A pseudoplastic material displays a decrease in viscosity with an in-crease in shear rate, and is also known as “shear thinning”. If you takeviscometer readings from a low to a high RPM and then back to the lowRPM, and the readings fall upon themselves, the material is time inde-pendent ,pseudoplastic and shear thinning.

Time Dependent means that the viscosity behavior changes as a function of time when measur-ing at a specific shear rate.

Thixotropic - A thixotropic material has decreasing viscosity under constant shearrate. If you set a viscometer at a constant speed recording viscosityvalues over time and find that the viscosity values decrease with time,the material is thixotropic.

Brookfield publication, “More Solutions to Sticky Problems”, includes a more detailed discus-sion 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 thespindle geometry conditions. The specifications of the viscometer spindle and chamber geometry willaffect the viscosity readings. If one reading is taken at 2.5 rpm, and a second at 50 rpm, the twoviscosity values produced will be different because the readings were made at different shear rates.The faster the spindle speed, the higher the shear rate.

The shear rate of a given measurement is determined by: the rotational speed of the spindle, the sizeand shape of the spindle, the size and shape of the container used and therefore, the distance betweenthe container wall and the spindle surface.

A repeatable viscosity test should control or specify the following:

1) Test temperature2) Sample container size (or spindle/chamber geometry)3) Sample volume4) Viscometer model5) Spindle used (if using LVDV-I+ (#1-4) or RVDV-I+ (#1-7) 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.


Appendix D - Spindle and Model Codes

Each spindle has a two digit code which is scrolled to via the keypad on the DV-I+. The spindle codedirects the DV-I+ to calculate viscosity for the spindle that is being used. The spindle multiplyerconstant (SMC) is used to calculate full scale viscosity range for any spindle/speed combination (referto Appendix E). Spindle codes are listed in Table D-1.

SPINDLE CODE SMC

RV1 01 1RV2 02 4RV3 03 10RV4 04 20RV5 05 40RV6 06 100RV7 07 400HA1 01 1HA2 02 4HA3 03 10HA4 04 20HA5 05 40HA6 06 100HA7 07 400HB1 01 1HB2 02 4HB3 03 10HB4 04 20HB5 05 40HB6 06 100HB7 07 400LV1 61 6.4LV2 62 32LV3 63 128LV4 64 640LV5 65 1280SPIRAL 70 105T-A 91 20T-B 92 40T-C 93 100T-D 94 200T-E 95 500T-F 96 1000

SPINDLE CODE SMC

ULA 00 0.64DIN-ULA 85 1.22TSEL-DIN-81 81 3.7SSA-DIN-82 82 3.75SSA-DIN-83 83 12.09ULA-DIN-85 85 1.22ULA-DIN-86 86 3.65ULA-DIN-87 87 12.13SC4-14 14 125SC4-15 15 50SC4-16 16 128SC4-18 18 3.2SC4-21 21 5SC4-25 25 512SC4-27 27 25SC4-28 28 50SC4-29 29 100SC4-31 31 32SC4-34 34 64SC4-37 37 25CPE40 40 0.327CPE41 41 1.228CPE42 42 0.64CPE51 51 5.178CPE52 52 9.922V-71 71 2.62V-72 72 11.10V-73 73 53.50

Table D-1


Table D-2 lists the model codes and spring torque constants for each viscometer model.

VISCOMETER TORQUE CONSTANT MODEL CODEMODEL TK ON DV-I+ SCREEN

LVDV-I+ 0.09373 LV2.5xLVDV-I+ 0.2343 4L5xLVDV-I+ 0.4686 5L1/4 RVDV-I+ 0.25 1R1/2 RVDV-I+ 0.5 2RRVDV-I+ 1 RVHADV-I+ 2 HA2xHADV-I+ 4 3A2.5xHADV-I+ 5 4AHBDV-I+ 8 HB2xHBDV-I+ 16 3B2.5xHBDV-I+ 20 4B5xHBDV-I+ 40 5B

Table D-2


Appendix E - Calibration Procedures

The accuracy of the DV-I+ is verified using viscosity standard fluids which are available from BrookfieldEngineering Laboratories or your local Brookfield agent. Viscosity standards are Newtonian, andtherefore, have the same viscosity regardless of spindle speed (or shear rate). Viscosity standards,calibrated at 25°C, are shown in Table E-1 (Silicone Oils) and Table E-2 (Mineral Oils).

Container size: For Viscosity Standards < 30,000 cP, use a 600 ml Low Form GriffinBeaker having a working volume of 500 ml.

For Viscosity Standards ≥ 30,000 cP, use the fluid container.

Inside Diameter: 3.25"(8.25cm)Height: 4.75"(12.1cm)

Note: Container may be larger, but may not be smaller.

Temperature: As stated on the fluid standard label: (+/-) 0.1°C

Conditions: The DV-I+ should be set according to the operating instructions. The waterbath must be stabilized at test temperature. Viscometers with the letters “LV”or “RV” in the model designation must have the guard leg attached (see page34 for more information on the guard leg).

Normal 25°C Standard Fluids High Temperature Standard FluidsViscosity (cP) Viscosity (cP) Three Viscosity/Temperatures**

5 5,000 HT-30,00010 12,500 HT-60,00050 30,000 HT-100,000

100 60,000500 100,000 **25°C, 93.3°C, 149°C

1,000 Refer to Brookfield catalog formore information.

Table E-1

MINERAL OIL VISCOSITY STANDARD FLUIDSBEL Part No. Viscosity (cP) 25°C

B31 31B210 210B750 750B1400 1,400B2000 2,000B11000 11,000B20000 20,000B80000 80,000B200000 200,000B420000 420,000

Table E-2


Brookfield Viscosity Standard Fluid - General Information

We recommend that Brookfield Viscosity Standard Fluids be replaced on an annual basis, one yearfrom date of initial use. These fluids are either pure silicone or mineral oil and are not subject to changeover time. However, exposure to outside contaminants through normal use requires replacement on anannual basis. Contamination may occur by the introduction of solvent, standard of different viscosityor other foreign material.

Viscosity Standard Fluids may be stored under normal laboratory conditions. Disposal should be inaccordance with state, local and federal regulations as specified on the material safety data sheet;MSDS information is available upon request.

Brookfield Engineering Laboratories does not recertify Viscosity Standard Fluids. We will issue dupli-cate 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 prac-tice for usage in a 600 ml beaker is to return the material from the beaker back into the bottle. Whenusing smaller volumes in accessories such as Small Sample Adapter, UL Adapter, Thermosel or SpiralAdapter, the fluid is normally discarded.

Calibration Procedure for LV(#1-4) and RV,HA,HB(#1-7) Brookfield spindles:

1) Place the viscosity standard fluid (in the proper container) into the water bath.

2) Lower the DV-I+ into measurement position (with guard leg if LV or RV series viscometer isused).

3) Attach the spindle to the viscometer. If you are using a disk shaped spindle, avoid trapping airbubbles beneath the disk by first immersing the spindle at an angle, and then connecting it to theviscometer.

4) The viscosity standard fluid, together with the spindle and guardleg, should be immersed in thebath for a minimum of 1 hour, stirring the fluid periodically, prior to taking measurements. Thespindle can be rotated in the fluid to accelerate temperature equilibrium.

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 soaktime if required to come to test temperature.

6) If the fluid is at test temperature, measure the viscosity and record the viscometer reading; include% and cP (m•Pas).

NOTE: The spindle must rotate at least five (5) times before readings are taken.

7) The viscosity reading should equal the cP value on the viscosity fluid standard to within thecombined 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 isstabilized at the proper temperature:

1) Put the proper amount of viscosity standard fluid into the sample chamber. The amountvaries with each spindle/chamber combination. (Refer to the Small Sample Adapterinstruction 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 hangingspindle (or directly attach the solid shaft spindle) to the DV-I+.

4) Allow sufficient time for the viscosity standard, sample chamber and spindle to reach testtemperature.

5) Measure the viscosity and record the viscometer reading; include % and cP (m•Pas).

NOTE: The spindle must rotate at least five (5) times before a viscosity readingis taken.

Calibration 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 thissection, entitled Calibration Procedure for LV (#1-4) and RV,HA,HB (#1-7) Brookfieldspindles.

2) Evaluate the Viscometer with the Thermosel according to the procedure decribed below.

When a Thermosel System is used, the controller stabilizes the Thermo Container at the testtemperature. DO NOT USE THE THERMOSEL TO CONTROL TO TEMPERATURES WITHIN15° OF AMBIENT TEMPERATURES. Consult your Thermosel manual for details.

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 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 hangingspindle (or directly attach the solid shaft spindle) to the DV-I+.


5) Measure the viscosity and record the viscometer reading; include % and cp (m•Pas).

NOTE: The spindle must rotate at least five (5) times before a viscosity reading is taken.


Calibration Procedure for UL Adapter

When a 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 ULAdapter instruction manual).

2) Attach the spindle (with extension link and coupling nut) onto the DV-I+.

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, connectthe inlet/outlets to the bath external circulating pump.



NOTE: The spindle must rotate at least five (5) times before a viscosity reading istaken.

Calibration Procedure 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 ULAdapter instruction manual).

2) Attach the spindle (with extension link and coupling nut) onto the DV-I+.

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, connectthe inlet/outlets to the bath external circulating pump.





Calibration Procedure for a Helipath Stand and T-Bar Spindles

When a Helipath Stand and T-Bar spindles are used:

Remove the T-bar spindle and select a standard LV(#1-4) or RV,HA,HB(#1-7) spindle. Followthe procedures for LV(#1-4) and RV,HA,HB (#1-7) Brookfield spindles outlined above.

T-Bar spindles should not be used for verifying calibration of the DV-I+ Viscometer.

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 theviscometer.

3) Lower the DV-I+ into measurement position. Operate the viscometer at 50 or 60 RPM untilthe chamber is fully flooded.

4) The viscosity standard fluid, together with the spindle, should be immersed in the bath.Stirring the fluid periodically (operate at 50 or 60 RPM), prior to taking measurements toencourage temperature equilibrium.

NOTE: The spindle must rotate at least five (5) times for one minute, whichever is greaterbefore readings are taken.

5) Measure viscosity and record the viscometer reading; include % and cP (m•Pas).

Calibration Procedure for Cone/Plate Viscometers:

1) Follow the procedures outlined in Appendix A for mechanically adjusting the setting ofthe cone to the plate.

2) Refer to Appendix A, Table 1, and determine the correct sample volume required for thespindle to be utilized.

3) Select a 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. Do not usea silicone viscosity standard fluid with a viscosity value greater than 5000 cP with a Cone/Plate Viscometer. Brookfield offers a complete range of mineral oil viscosity standardssuitable for use with Cone/Plate Viscometers. See Table E-2. It is best to use a viscositystandard fluid that will be close to the maximum viscosity for a given cone spindle/speedcombination.

Example: LVDV-I+ Viscometer, Cone CP-42, Fluid 10Having a viscosity of 9.7 cP at 25°C

At 60 RPM, the full scale viscosity range is 10.0 cP. Thus, the Viscometer reading shouldbe 97% torque and 9.7 cP viscosity ± 0.197 (closer to ±0.2) cP. The accuracy is acombination of Viscometer and fluid tolerance (refer to Interpretation of CalibrationTest Results).


4) With the viscometer stopped, remove the sample cup and place the viscosity standard fluidinto the cup.

5) Allow sufficient time for temperature to reach equilibrium, and connect the sample cupto the Viscometer.

6) Measure the viscosity and record the Viscometer reading in both % torque and centipoise.


Interpretation of Calibration Test Results:

When verifying the calibration of the DV-I+, the instrument and viscosity standard fluid errormust be combined to calculate the total allowable error.

The DV-I+ 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-I+ with RV-3 Spindle at2 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:

Full Scale Viscosity Range [cP] = TK * SMC *10,000RPM

Where:TK = 1.0 from Table D2SMC = 10 from Table D1

Full Scale Viscosity Range = 50,000 cP1 * 10 * 10,0002

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 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 theviscometer is operating correctly. Any reading outside these limits may indicate aviscometer problem. Contact the Brookfield technical sales department or your localBrookfield 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 theBrookfield Viscometer included hand held operation while measuring fluids in a 55 gallon drum. It isclear that under those conditions the potential for damage to the spindle was great. Original construc-tion included a sleeve that protected the spindle from side impact. Early RV guard legs attached to thedial housing and LV guard legs attached to the bottom of the pivot cup with a twist and lock mecha-nism.


The current guard leg is a band of metal in the shape of the letter U with a bracket at the top thatattaches to the pivot cup of a Brookfield Viscometer/Rheometer. Because it must attach to the pivotcup, the guard leg cannot be used with a Cone/Plate instrument. A guard leg is supplied with all LV andRV series instruments, but not with the HA or HB series. It’s shape is designed to accommodate thespindles of the appropriate spindle set; therefore, the RVguard leg is wider than the LV due to the large diameter ofthe RV #1 spindle. They are not interchangeable.

The calibration of the Brookfield Viscometer/Rheometer isdetermined using a 600 ml Low Form Griffin Beaker. Thecalibration of LV and RV series instruments includes theguard leg. The beaker wall (for HA/HB instruments) or theguard leg (for LV/RV instruments) define what is called the“outer boundary” of the measurement. The spindle factorsfor the LV, RV, and HA/HB spindles were developed withthe above boundary conditions. The spindle factors are usedto convert the instrument torque (expressed as the dial read-ing or %Torque value) into centipoise. Theoretically, if mea-surements are made with different boundary conditions, e.g.,without the guard leg or in a container other than 600 mlbeaker, then the spindle factors found on the Factor Findercannot be used to accurately calculate an absolute viscosity.Changing the boundary conditions does not change the vis-cosity of the fluid, but it does change how the instrument torque is converted to centipoise. Withoutchanging the spindle factor to suit the new boundary conditions, the calculation from instrument torqueto viscosity will be incorrect.

Practically speaking, the guard leg has the greatest effect when used with the #1 & #2 spindles of theLV and RV spindle sets. Any other LV (#3 & #4) or RV (#3 - #7) spindle can be used in a 600 ml beakerwith or without the guard leg to produce correct results. The HA and HB series Viscometers/Rheom-eters are not supplied with guard legs in order to reduce the potential problems when measuring highviscosity materials. HA/HB spindles #3 through #7 are identical to those spindle numbers in the RVspindle 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 followthe 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 cus-tomers to follow. The guard leg is one more item to clean. In some applications the 500 ml of test fluidrequired to immerse the spindles in a 600 ml beaker is not available. In practice, a smaller vessel maybe used and the guard leg is removed. The Brookfield Viscometer/Rheometer will produce an accurateand repeatable torque reading under any measurement circumstance. However, the conversion of thistorque reading to centipoise will only be correct if the factor used was developed for those specificconditions. Brookfield has outlined a method for recalibrating a Brookfield Viscometer/Rheometer toany measurement circumstance in “More Solutions to Sticky Problems”, Section 3.3.10. It is impor-tant to note that for many viscometer users the true viscosity is not as important as a repeatable day today value. This repeatable value can be obtained without any special effort for any measurementcircumstance. But, it should be known that this type of torque reading will not convert into a correctcentipoise value when using a Brookfield factor if the boundary conditions are not those specified byBrookfield.

The guard leg is a part of the calibration check of the Brookfield LV and RV series Viscometer/Rheom-eter. 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 ofoperation to suit their needs.

LV Guardleg RV Guardleg


Appendix F - Special Speed Sets

The following special speeds sets are available from Brookfield Engineering Laboratories. Allspeeds are in units of RPM.

Step SS200 SS150 SS100 SS50 SS25 SSINT1 0.0 0.0 0.0 0.0 0.0 0.02 1.0 0.8 0.5 0.2 0.1 0.33 1.4 1.1 0.7 0.3 0.2 0.54 1.8 1.4 0.9 0.4 0.3 0.65 2.0 1.5 1.0 0.5 0.4 1.06 4.0 3.0 2.0 1.0 0.5 1.57 6.0 4.0 3.0 1.5 0.7 2.08 8.0 6.0 4.0 2.0 1.0 2.59 10 7.5 5.0 2.5 1.2 3.0

10 20 15 10 5.0 2.5 4.011 40 30 20 10 5.0 5.012 60 40 30 15 7.5 6.013 80 60 40 20 10 1014 100 75 50 25 12 1215 120 90 60 30 15 2016 140 105 70 35 17 3017 160 120 80 40 20 5018 180 135 90 45 22 6019 200 150 100 50 25 100

RPM SPEED SET (RPM)

Table F-1

Please consult Brookfield Engineering or your local dealer/distributor for any special speedrequirements not addressed by either the standard speed sets shown in Table 1 (page 8) or inTable F-1.


Appendix G - Communications

2

3

4

5

6

7

8

9

1

No Connection

No Connection

Analog Ground (%Torque & Temperature)

Analog % Torque (see Note 1)

DV-I+ with Temperature Option Analog Outputs

Connected

internally. Do

not use. No Connection

Analog Temperature - optional (see Note 2){NOTES: 1. This is a 0-1 volt d.c. output where 0 volts corresponds to 0% torque and 1

volt corresponds to 100% torque with a resolutuion of 1 millivolt (0.1%).

2. This is a 0-4 volt d.c. output where 0 volts corresponds to -100°C and 4 voltscorrepsonds to +300°C with a resolution of 1 millivolt (0.1°C).

Figure G-1

Analog Output:

The analog outputs for % torque is accessed from the 9-pin connector located on the rear panel ofthe DV-I+. The pin connections are shown in Figure G-1.

The output cable (Part No. DVP-96Y) connections are:

Red Wire: (Not used with DV-I+)

Black Wire: (Not used with DV-I+)White Wire: % Torque OutputGreen Wire: % Torque Ground

Please contact Brookfield Engineering Laboratories or your local dealer/distributor for purchaseof the DVP-96Y analog output cable.


Figure H-1

*Provided with instruments shipped after October 1, 1999. Replaced Model A Laboratory Stand.

Appendix H - Model S Laboratory Stand with Parts Identification*

ITEM PART #

1098765432

1

211111121

OPTIONAL

QTY.

VS-29WVS-29VS-41YVS-40YVS-35502020032S34Z50S311824S06BVS-3VS-2

VS-34VS-38

1

DESCRIPTION

BELLEVILLE SPRING WASHERTENSION INSERTCLAMP SCREW ASSEMBLYGEAR SCREW ASSEMBLYCLAMPLOCKWASHER, EXTERNAL TOOTH, 5/16 X 5/8 X 1/32SCREW, 5/16-18 X 3/4 LG. SLOTTED PAN HD.LEVELING SCREWBASE

14” UPRIGHT ROD18” UPRIGHT ROD

11 1VS-28 TENSION SCREW

VS-35YMODEL S

CLAMP ASSEMBLY

2

3

4

5

1 8

6

7

9

10

11

BROOKFIELDLABORATORYVISCOMETER


Unpacking

Check carefully to see that all the components are received with no concealed damage.

1 Base, VS-2, with 2 Leveling Screws, VS-3, packed in a cardboard carton1 Upright Rod, VS-34, with attached Clamp Assembly, VS-35Y

Assembly (Refer to Figure H-1)

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 ofthe legs, i.e., parallel to the leveling feet.

3. Rotate the rod/clamp assembly slightly until the slot on the bottom of the rod intersects thepin located in the base.

4. While holding the rod and base together, insert the slotted screw and washer as shown andtighten securely.

Viscometer Mounting

Insert the Viscometer mounting rod into the hole (with the cut-away slot) in the clamp assembly.Adjust the instrument level until the bubble is centered from right to left and tighten the clampknob (clockwise). Use the leveling screws to “fine” adjust the viscometer level. Note: If theDigital Viscometer cannot be leveled, check to insure that the rod is installed with the gearrack facing forward.

Note: If the clamp is taken off the upright rod, the tension insert (Part No. VS-29) must beproperly aligned for the clamp to fit back onto the upright rod.When the tension insert (Part No. VS-29) is inserted, its slot must be in the verticalposition parallel to the upright rod. If the slot is not in the correct position, the clampwill not slide down over the upright rod. Use a small screwdriver or pencil to moveit into the correct position. The VS-29W Belleville spring washers must face eachother as illustrated. Adjust the VS-28 tension screw so that the clamp assembly is notloose on the upright rod.

Do not tighten the clamp knob unless the viscometer mounting rod is insertedin the clamp assembly.

Center the Viscometer relative to the stand base and retighten the large slotted pan head screw asrequired. Referring to the Viscometer bubble level, adjust the leveling screws until the instru-ment is level.


Figure H-2

**Provided with instruments shipped before October 1, 1999

Model A Laboratory Stand**

1 VS-20 UPRIGHT ROD 1 2 VS-1 BASE 1 3 VS-3 LEVELING SCREW 3 4 VS-21 JAM NUT 1 5 VS-35 CLAMP 1 6 VS-40Y GEAR SCREW ASSEMBLY 1 7 VS-41Y CLAMP SCREW ASSEMBLY 1 8 VS-29 TENSION INSERT 1 9 VS-29W BELLEVILLE SPRING WASHER 2 10 VS-28 TENSION SCREW 1 11 50S103208S25B SCREW, 4-40 X 3/8 LG. SOC. HD. CAP, 18-8 SS 1 BLM-4E ROD EXTENSION-4" LONG OPTIONAL BLM-4E2 RODE EXTENSION - 8" LONG OPTIONAL

12


Check carefully to see that all the components are received with no concealed damage.1 base 1 jam nut3 leveling screws 1 clamp assembly1 upright rod

Remove the three (3) leveling screws from the base and discard the packing material. Removethe jam nut from the upright rod.

Assembly (Refer to Figure H-2)

Screw the leveling screws into the base. Insert the threaded end of the upright rod into the hole inthe top of the base and attach the jam nut to the rod on the underside of the base. With the rod gearrack facing forward (toward the “V” in the base), gently tighten the jam nut.

Viscometer Mounting

The VS-41Y 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 machinedkey ridge of the viscometer handle. Insert the viscometer handle into the cut-away hole of theclamp assembly. Adjust the instrument level until the bubble is centered within the target andtighten the clamp screw, VS-41Y.

Note: The small clamp adjusting screw (Figure H2) on the front of the clamp assemblyshould be loosened or tightened as necessary to provide smooth height adjust-ment and adequate support for the Viscometer.

Center the Viscometer relative to the stand base and retighten the jam nut as required. Referringto the Viscometer bubble level, adjust the leveling screws until the instrument is level.

Operation

Rotate the Gear Screw to raise or lower the viscometer.

Unpacking


Appendix I - DVE-50 Probe Clip

Probe Clip DVE-50 is supplied with all model DV-II+ Viscometers, DV-III Rheometers, andDigital Temperature Indicators. It is used to attach the RTD temperature probe to the LV GuardLeg (Part No. B-20Y) or 600 ml 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 guardleg. When inserting the RTD probe into the Probe Clip, the upper part of the Clip is compressedby squeezing the points shown in Figure I-1. Note: All Viscometer/Rheometer models — exceptLV — use the Probe Clip as shown in Figure I-1 through I-3.

Figure I-1 shows the Probe Clip (with RTD temperature probe installed) mounted on the LVguard leg.

RTD ProbeHole

Squeeze Here wheninstalling RTD

Temperature Probe

Figure I-1

Figure I-3 shows the Probe Clip mounted in a 600 ml low form Griffin beaker. This mountingmay be used with LV, RV, HA and HB series instruments.

Note: The RTD probe must be parallel to the beaker wall so as not to interfere with theviscosity measurement.

LV Guard LegAssembly, B-20Y

DVE-50Probe Clip

RTD TemperatureProbe

600 mlUSA

No. 14000

500 ml

400

300

200

100

RTD TemperatureProbe

DVE-50Probe Clip

600 ml Low FormGriffin Beaker

Figure I-2 Figure I-3

Tp


Appendix J - Fault Diagnosis and Troubleshooting

Listed are some of the more common problems that you may encounter while using your Viscometer.

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.❏ Check the straightness of all other spindles; replace them if bent.❏ 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 G).❏ Check to see if spindles rotate eccentrically or wobble. There is an allowable runout for 1/

32-inch in each direction (1/16-ionch total) when measured from the bottom of the spindlerotating in air.

❏ Check to see if the viscometer coupling is bent; if so, the unit is in need of service.

If you are continuing to experience problems with your viscometer, follow this troubleshooting sectionto help isolate the potential problem.

Perform an Oscillation Check

❏ Remove the spindle and turn the motor OFF.❏ Gently push up on the viscometer coupling.❏ Turn the coupling until the % on the display reads 15% - 20%.❏ Gently let go of the coupling.❏ Watch the coupling screw swing freely and rest on zero; watch the % values decrease and

rest at 0.0 (±0.1%)

If the viscometer does not rest at zero, the unit is need of service. See Appendix G for details on howto return your viscometer.


Inaccurate Readings

❏ Verify spindle, speed and model selection❏ Verify test parameters: temperature, container, volume, method. Refer to:

• “More Solutions to Sticky Problems”; Section II.2A - Considerations for Making Mea-surements

• Dial Viscometer Operating Manual; Appendix B - Viscosity Ranges• Dial Viscometer Operating Manual; Appendix C - Variables in Viscosity Measurement

❏ Perform a calibration check. Follow the instructions in Appendix D.• Verify tolerances are calculated correctly.• 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 G fordetails on how to return your viscometer.


Appendix K - Warranty Repair and Service

Warranty

Brookfield Viscometers are guaranteed for one year from date of purchase against defects in materialsand workmanship. They are certified against primary viscosity standards traceable to the NationalInstitute of Standards and Technology (NIST). The Viscometer must be returned to Brookfield Engi-neering Laboratories, Inc. or the Brookfield dealer from whom it was purchased for no charge war-ranty service. Transportation is at the purchaser's expense. The Viscometer should be shipped in itscarrying case together with all spindles originally provided with the instrument.

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) 946-6262www.brookfieldengineering.com

For repair or service outside the United States consult Brookfield Engineering Laboratories, Inc. or thedealer from whom you purchased the instrument.

For repair or service in the United Kingdom return to:

Brookfield Viscometers Limited1 Whitehall Estate

Flex MeadowPinnacles West

Harlow, Essex CM19 5TJ, United Kingdom

Telephone: (44) 27/945 1774 FAX: (44) 27/945 1775www.brookfield.co.uk

For repair or service in Germany return to:

Brookfield Engineering Laboratories Vertriebs GmbHHauptstrasse 18

D-73547 Lorch, Germany

Telephone: (49) 7172/927100 FAX: (49) 7172/927105www.brookfield-gmbh.de

On-site service at your facility is also available from Brookfield. Please contact our ServiceDepartment for details.


❏ Remove and return all spindles (properly packedfor shipping).

❏ Clean excess testing material off the instrument.

❏ Include MSDS sheets for all materials tested withthis instrument.

❏ Support pointer shaft with white, nylon shippingcap, as shown in Figure K1, or with white plasticshipping cap originally supplied with instrument.

❏ Pack the instrument in its original case. Casesare available for immediate shipment fromBrookfield. If the case is not available, takecare to wrap the instrument with enough materialto support it. Avoid using foam peanuts orshredded paper.

❏ DO NOT send the laboratory stand unless thereis a problem with the upright rod, clamp or base.If there is a problem with the stand, remove theupright rod from the base and individually wrapeach item to avoid contact with the instrument.Do not put lab stand in viscometer carrying case.

❏ Fill out the Viscometer Information Sheet withas much information as possible to help expediteyour service. If you do not have this form, pleaseinclude a memo indicating the type of problemyou are experiencing or the service you needperformed. Please also include a purchase ordernumber for us to bill against.

❏ Package the instrument and related items in astrong box for shipping. Mark the outside of thebox with handling instructions.

Example: "Handle with Care" or"Fragile - Delicate Instrument"

For cone/plate instruments, please remove the cone spindle and carefully pack in placein the shipping case. If available, use the original foam insert or roll up one sheet oftissue paper (or similar) and place between the spindle coupling and cup assembly (seeFigure K2). This will help prevent damage in shipping.

CONE/PLATE

Packaging Instructions to Return a Viscometer for Repair or Calibration

FIGURE

L1

FIGURE

L2

aaaaaaaaaaaaaaaaaaaaFoam Insertor Tissue Paper


Providing us with the following information will help us to service your equipment more quickly andefficiently. Please fill out and return a copy of this form with your instrument.

Brookfield recommends that all viscometers be returned for annual calibration to ensure that yourequipment continues to provide the same accuracy you have come to expect from Brookfield products.

COMPANY INFORMATION

3 SERVICE INFORMATION

Operating Conditions (Spindle; Speed; Viscosity Range; Temp. Control; Temperature of Sample):__________________________________________________________________________________________________________________________________________________

Did you contacting Brookfield before returning this instrument? Y❏ N❏ If yes, whom did you contact? ________________________________________________Description/Symptoms of Present Problem/Malfunction (please list all):___________________________________________________________________________________________________________________________________________________________________________________________________________________________

Time Since Last Serviced (if known): ______ Before & After Calibration Check? Y❏ N❏Other Comments: _______________________________________________________________________________________________________________________________________________________________________________________________________

1

2

When returning your instrument for repair, please use this tear-off sheet.

VISCOMETER INFORMATION

Date:_______________________

Serial Number: _______________________ Model: _____________________

Company: _________________________ Primary User: ________________________Telephone: ________________________ Fax: ________________________________P.O. Number: ______________________ (to cover repair and shipping)

Billing Address: ____________________ Shipping Address: ______________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ___________________________________

Return Shipment Instructions: UPS ground ❏ UPS Next Day ❏ UPS 2nd Day ❏Federal Express ❏ _______________________________

(Federal Express Account Number required)

STEPS: ❏ Return the Viscometer to the attention of the Repair Department at the address above.❏ Package the Viscometer for shipment as outlined.❏ Include a purchase order or purchase order number with this form.

Brookfield E

ngineering Laboratories, Inc.P

age 51M

anual No. M

/92-021-N0902

Ap

pen

dix L

- Visco

sity Test Rep

ort

VISCOSITY TEST REPORT

SAMPLE MODEL SPINDLE RPM DIAL READING FACTOR VISCOSITY SHEAR TEMP TIME NOTES% TORQUE cP RATE °C

TEST INFORMATION:

CONCLUSIONS:

FOR:DATE:

BY:

BROOKFIELD ENGINEERING LABORATORIES, INC. • 11 Commerce Boulevard • Middleboro, MA 02346 • TEL: 508-946-6200 or 800-628-8139 (USA) FAX: 508-946-6262 • www.brookfieldengineering.com

brookfield digital viscometer model dv-i manual no. … · brookfield engineering laboratories,...

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