Brookfield DV-E Viscometer User Manual

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BROOKFIELD DIGITAL VISCOMETER

MODEL DV-E

Operating Instructions

Manual No. M98-350-J0912

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 F

AX 508-946-6262

or 800-628-8139 (USA excluding MA) I

NTERNET

http://www.brookfieldengineering.com

Brookeld Engineering Labs., Inc. Page 1 Manual No. M98-350-J0912

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Table of Contents

I. INTRODUCTION .......................................................................................... 5

I.1 Components ............................................................................................................. 5

I.2 Instrument Dimensions ........................................................................................... 7

I.3 Utilities ...................................................................................................................... 8

I.4 Specications ........................................................................................................... 8

I.5 Set-Up ........................................................................................................................ 9

I.6 Safety Symbols and Precautions ........................................................................... 9

I.7 Instrument Controls ............................................................................................... 10

I.8 Cleaning .................................................................................................................. 11

II. GETTING STARTED ................................................................................. 12

II.1 Power Up................................................................................................................ 12

II.2 Spindle Selection .................................................................................................. 12

II.3 Speed Selection & Setting.................................................................................... 13

II.4 Autorange and CGS or SI Units Selection .......................................................... 14

II.5 Out of Range .......................................................................................................... 15

II.6 Operation ............................................................................................................... 16

Appendix A - Viscosity Ranges ..........................................................................................17

Appendix B - Variables in Viscosity Measurement .............................................................20

Appendix C - Spindle and Model Codes ............................................................................22

Appendix D - Calibration Check Procedures......................................................................24

Appendix E - Model A Laboratory Stand ............................................................................30

Appendix F - The Brookeld Guardleg ...............................................................................32

Appendix G - Fault Diagnosis and Troubeshooting............................................................ 34

Appendix H - Online Help and Other Resources ...............................................................35

Appendix I - Warranty Repair and Service ........................................................................36

Viscosity Test Report ...................................................................................37 (Tear out page)

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I. INTRODUCTION

The Brookeld DV-E Viscometer measures uid viscosity at given shear rates. Viscosity is a

measure of a uid’s resistance to ow. You will nd a detailed description of the mathematics of viscosity in the Brookeld publication “More Solutions to Sticky Problems”, a copy of which

was included with your DV-E and can be downloaded in pdf form from the Brookeld website,

www.brookeldengineering.com.

The principle of operation of the DV-E is to rotate a spindle (which is immersed in the test uid)

through a calibrated spring. The viscous drag of the uid against the spindle is measured by the spring deection. Spring deection is measured with a rotary transducer which provides a torque

signal. The measurement range of a DV-E (in centipoise or milliPascal seconds) is determined

by the rotational speed of the spindle, the size and shape of the spindle, the container in which the spindle is rotating, and the full scale torque of the calibrated spring.

There are four basic spring torque series offered by Brookeld:

Spring Torque

Model dyne-cm milli Newton-m

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

The higher the spring torque, the higher the measurement range. The viscosity measurement range

for each spring torque may be found in Appendix A.

All units of measurement are displayed according to either the CGS (cP) system or the SI

(mPa•s) system.

1. Viscosity appears in units of centipoise (shown as “cP”) or milliPascal-seconds (shown

as “mPa•s”) on the DV-E display.

2. Torque appears in units of dyne-centimeters or Newton-meters (shown as percent “%”

in both cases) on the DV-E display.

The equivalent units of measurement in the SI system are calculated using the following conversions:

SI CGS

Viscosity: 1 mPa•s = 1 cP Torque: 1 Newton-m = 10

dyne-cm

References to viscosity throughout this manual are made in CGS units. The DV-E Viscometer

provides equivalent information in SI units (see Section II.4 AUTORANGE).

I.1 Components

Please check to be sure that you have received all components, and that there is no damage. If

you are missing any parts, please notify Brookeld Engineering or your local Brookeld agent immediately. Any shipping damage must be reported to the carrier.

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Component Part Number Quantity DV-E Viscometer varies 1

Model A laboratory stand Model AK 1 Spindle Set with Case:

LVDV-E set of four spindles SSL 1 or RVDV-E set of six spindles (#2-#7) SSR 1 or

HA/HBDV-E set of six spindles (#2-#7) SSH 1

Power Cord: for 115 VAC DVP-65 1 or for 230 VAC DVP-66 1 Guard Leg:

LVDV-E B-20Y 1 or RVDV-E B-21Y 1

Carrying Case 001Y 1 Shipping Cap B-30-3 1

DV-E Viscometer

Shipping

Cap

Guard Leg

Model A Laboratory Stand

Figure I-1

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I.2 Instrument Dimensions

11 47/64” [29.8 cm]

4 5/64”

[10.4 cm]

DV-E VISCOMETER

6”

[15.3 cm]

B-20Y

LV GUARD LEG

ASSEMBLY

1 7/16”

[3.7 cm]

10 7/8”

[27.6 cm]

14 41/64” [37.2 cm]

LAB STAND BASE ASSEMBLY

Figure I-2

7 13/32”

[18.8 cm]

16 23/64” [41.5 cm]

VS-1Y

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I.3 Utilities

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

Power Cord Color Code:

United States

Outside United States

Hot (live) Black Brown Neutral White Blue Ground (earth) Green Green/Yellow

Input voltage can only be internally selected by a qualied technician from Brookeld or an authorized Brookeld dealer.

I.4 Specications

Speeds: 0.3, 0.5, 0.6, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 10, 12, 20, 30, 50, 60, 100 RPM

Weight: Gross Weight 20 lb 9 kg Net Weight 17 lb 7.7 kg Carton Volume 1.65 cu ft 0.05 m

Carton Dimension 19 x 10 x 15 in 48 x 25 x 38 cm

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

Accuracy: ±1.0% Full Scale Range in Use (See Appendix D for details)

Reproducibility: 0.2% of Full Scale Range

Electrical Certications:

Conforms to CE Standards:

BSEN 61326:

Electrical equipment for measurement, control and laboratory use - EMC requirements

BSEN 61010-1: Safety requirements for electrical equipment, for measurement, control

and laboratory use.

NOTICE TO CUSTOMERS:

This symbol indicates that this product is to be recycled at an appropriate collection center.

Users within the European Union:

Please contact your dealer or the local authorities in charge of waste management on how to dispose of this product properly. All Brookeld ofces and our network of representatives and dealers can be found on our website: www.brookeldengineering.com.

Users outside of the European Union:

Please dispose of this product according to your local laws.

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I.5 Set-Up

Note: “IQOQPQ”, a guideline document for installation, operation and

performance validation for your DV-E Viscometer, can be downloaded from our website: www.brookeldengineering.com.

1. To assemble the Model A Laboratory Stand, place the upright rod into the base (refer to

assembly instructions in Appendix E).

2. Insert the mounting rod on the back of the DV-E Viscometer into the hole on the clamp assembly. (Refer to Appendix E).

3. The Viscometer must be leveled. The level is adjusted using the three leveling screws on

the base. Adjust so that the bubble level on top of the DV-E is centered within the circle.

Note: Check level peroiodically during use.

4. Remove the Viscometer shipping cap from the pivot cup. This cap is designed to protect the

Viscometer spindle coupling nut during shipment. Do not attempt to operate the Viscometer with the shipping cap in place! Save this cap for future use.

5. Make sure that the power switch at the rear of the DV-E is in the OFF (0) position. Connect

the power cord to the socket on the back panel of the instrument and plug it into the appropriate AC power line.

The AC input voltage and frequency must be within the appropriate range as shown on

the name plate of the viscometer.

The DV-E must be earth grounded via its power mains cable plug/socket for electrical

safety and to ensure against electronic failure!!

I.6 Safety Symbols and Precautions

Safety Symbols

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

Indicates hazardous voltages may be present.

Refer to the manual for specic warning or caution information to avoid personal injury

or damage to the instrument.

Precautions

If this instrument is used in a manner not specied by the manufacturer, the protection provided by the instrument may be impaired.

This instrument is not intended for use in a potentially hazardous environment.

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In case of emergency, turn off the instrument and then disconnect the electrical cord from

the wall outlet.

The safety of any system, incorporating this instrument, is the responsibility of the

assembler of the system.

The user should ensure that the substances placed under test do not release poisonous, toxic or ammable gases at the temperatures to which they are subjected to during the

testing.

I.7 Instrument Controls

The following describes each switch’s function:

MOTOR ON

Turns the motor ON or OFF.

AUTO RANGE

Presents the maximum (100% torque) viscosity

attainable using the selected spindle at the selected speed. This value is referred to as full scale range. The allowable error for the viscosity measurement is ± 1% of full scale range.

Note: Pressing and holding the AUTO

RANGE key during power on will enable the viscosity display to be read in either CGS (cP) or SI (mPa•s) units.

SPEED/SPINDLE SWITCH

Sets the viscometer in either speed select or spindle

select (see Table C-1 in Appendix C) mode. When set in the left position, the operator may select speed of rotation. When set in the right position, the operator may select spindle.

Note: This is a three (3) position switch. We recommend that the switch be set to the

middle position when nished with spindle or speed adjustment. This will prevent

Figure I-2

an accidental change of parameters during a test.

SELECT KNOB

This knob is used to scroll through the available speed or spindle selections (see Table C-1 in

Appendix C). This knob is active when the switch is set to the left (speed) or right (spindle) position.

Rotate the knob clockwise to increase value and counter-clockwise to decrease value.

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I.8 Cleaning

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

Immersed Components (spindles): Spindles are made of stainless steel. Clean with non-

Make sure the instrument is in a decent working environment (dust-fr ee, moderate temperature, low humidity, etc.).

Make sure the instrument is on a level surface.

Hands/ngers must be clean and free of residual sample. Not doing so may result

in deposit build up on the upper part of the shaft and caue interference between the shaft and the pivot cup.

Be sure to remove the spindle from the instrument prior to cleaning. Note lefthand thread. Severe instrument damage may result if cleaned in place.

or cleaners.

abrasive cloth and solvent appropriate for sample material that is not aggressive to immersed components.

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

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II. GETTING STARTED

II.1 Power Up

Turn the power switch (located on the rear panel) to the ON (I) position. This will result in the

following screen display:

BROOKFIELD DV-E RV VISCOMETER

Figure II-1

After a few seconds, the following screen appears:

BROOKFIELD DV-E VERSION: 1.00

Figure II-2

After a short time, the display will clear and the default screen is displayed:

cP 10OFF % S02

Figure II-3

II.2 Spindle Selection

LVDV-E Viscometers are provided with a set of four spindles and a narrow guardleg; RVDV-E Viscometers come with a set of six spindles and a “wider” guardleg; HADV-E and HBDV-E Viscometers come with a set of six spindles and no guardleg.

(See Appendix F for more information on the guardleg.)

The spindles are attached to the viscometer by screwing them to the male coupling nut (see Figure II-4). Note that the spindles

and coupling have a left-hand thr ead. The lower shaft should

be held in one hand (lifted slightly), and the spindle screwed to the left. The face of the spindle nut and the matching surface on the coupling nut shaft should be smooth and clean to prevent eccentric rotation of the spindle. Spindles can be identied by the number on the side of the spindle coupling nut.

The DV-E must have a Spindle Entry Code number to calculate viscosity values. The DV-E memory contains parameters for

all standard Brookeld spindles and the two digit entry code for each spindle (the complete list of spindle entry codes may

be found in Appendix C).

Note: The DV-E will display the Spindle Entry Code

which was in use when the power was turned off.

Figure II-4

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Setting the SPEED/SPINDLE switch to the right position will allow the operator to adjust the

spindle selection. The SELECT knob can be rotated until the desired spindle number is selected. Once the desired spindle number is shown on the display, set the SPINDLE/SPEED switch to the

middle position.

Note: Verify the proper spindle entry code for the selected spindle found in Appendix

C. Not all spindles have an entry code number that is the same as the spindle number. For example: the spindle entry code for spindle LV-1 is 61 and the spindle entry code for UL Adapter is 00.

The DV-E will begin to calculate using the new spindle parameters after the spindle number is

shown in the display.

Please see Brookeld publication, “More Solutions to Sticky Problems” (Chapter 3), for information

on how to select a spindle.

II.3 Speed Selection & Setting

There are 18 rotational speeds available on the DV-E Viscometer. These speeds correspond to the

standard LVF, LVT, RVF, RVT, HAT and HBT Dial Viscometers models and they are combined

sequentially. See Table 1 below.

Table 1: DV-E Speeds

0.3 10

0.5 12

0.6 20

1.0 30

1.5 50

2.0 60

2.5 100

3.0

4.0

5.0

6.0

Table

Setting the SPEED/SPINDLE switch in the left position will allow the operator to adjust the speed

selection. The SELECT knob can be rotated until the desired speed is selected. Once the desired speed is shown on the display, set the SPINDLE/SPEED switch to the middle position.

The viscometer will rotate the spindle at the selected speed when the motor switch is in the ON

position. A motor on condition is indicated on the display by RPM shown beside the speed. When the motor switch is in the OFF position, OFF will be displayed beside the speed.

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cP 12RPM % S02

(MOTOR ON)

Figure II-5

cP 12OFF % S02

(MOTOR OFF)

Figure II-6

Note: When the motor switch is in the ON position, any change to the selected speed

will be effective immediately. When collecting data at multiple speeds, you may wish to leave the SPEED/SPINDLE switch in the left position to facilitate speed changes. Also, when the motor switch is turned off, the display will hold the last measured torque value and measured viscosity.

The DV-E Viscometer employs an optical signal pick-up inside the instrument to detect the torque

value of the calibrated spring. This optical signal pick-up is recorded four times per revolution of the spindle. When the spindle begins to rotate at a dened speed, four torque values are recorded during the rst full revolution of the spindle and averaged together. The display reports the average value for both torque (%) and viscosity (cP or mPa•s). Thereafter, the next torque value recorded by the optical signal pick-up is averaged together with the three preceding torque values and the newly calculated torque (%) and viscosity (cP or mPa•s) values are then displayed. This 4x revolution pick-up and display continues as long as the motor is on.

This algorithm in the instrument rmware is used for all viscosity and torque readings. Consequently,

the wait time to observe the initial displayed readings for torque and viscosity increase as you go

to lower speeds.

It may also be necessary to allow time for the indicated reading to stabilize.

Note: At speeds of 1 RPM and lower, additional time may be required to allow for

complete deection of the torque sensor. The % (torque) and cP (viscosity) will ash until 1 revolution is achieved and the % torque value is greater than 10%.

The time required for stabilization will depend on the speed at which the Viscometer is running

and the characteristics of the sample uid. For maximum accuracy, readings below 10% should be avoided. Additional information on making viscosity measurements is available in Appendix B or

the Brookeld publication “

More Solutions to Sticky Problems” .

The DV-E Viscometer will remember the selected speed and spindle when power is turned off. On

start-up, the Viscometer will be set to the previously selected spindle and speed.

Please see Brookeld publication “More Solutions to Sticky Problems” (Chapter 3) for information

on how to select a speed.

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II.4 Autorange and CGS or SI Units Selection

The

AUTO RANGE key allows you to determine the maximum calculated viscosity (full scale

reading) possible with the curr ent spindle/speed setting. Pressing the key at any time will cause the current viscosity display to change and show that maximum viscosity. The screen torque display will now display “%100” to indicate this special condition. This maximum viscosity and %100

value will be displayed for as long as the

AUTO RANGE key is depressed. Figure II-7 shows the

AUTO RANGE function for the situation where the No. 2 RV spindle is rotating at 10 RPM. The

full scale range is 4000 cP (or 4000 mPa

s).

cP 4000 10RPM %100 S02

Figure II-7

Pressing and holding the AUTO RANGE key during power on will enable the viscosity unit

displayed to toggle between CGS (cP) and SI (mPa•s) units. To change the unit format:

1. Turn the power off.

2. Press and hold the AUTO RANGE key and turn the power ON.

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

CGS SI

Viscosity: cP mPa

1 cP = 1 mPa•s

II.5 Out of Range

The DV-E gives indications for out of specication or out-of-range operation. When % (Torque)

readings exceed 100.0 % (over-range), the display changes to that shown in Figur e II-8. You must

either reduce the speed or use a smaller size spindle to correct this condition.

cP EEEE 10RPM %EEEE S02

Figure II-8

If you operate at spindle speeds that produce % (Torque) below 10.0 % (under-range), the DV-E

displays both % (Torque) and cP (Viscosity) with ashing unit designations, as shown is Figure II-9. You must either increase speed or use a larger size spindle to correct this condition.

The parameters of % (Torque) and cP (Viscosity) will also ash prior to one complete spindle

revolution. It is not recommended that readings are taken while parameters are ashing.

Brookeld Engineering Labs., Inc. Page 15 Manual No. M98-350-J0912

cP 360

10RPM % 9.0 S02

Figure II-9

Negative % (Torque) will be displayed as shown in Figure II-10. Viscosity values will be displayed

as “- - - -” when the % (Torque) is below zero.

cP ---10RPM %-1.0 S02

Figure II-10

II.6 Operation

The following procedure is outlined for making a viscosity measurement in the recommended 600

mL low form Grifn beaker.

1. Insert and center spindle in the test material until the uid’s level is at the immersion groove on the spindle’s shaft. With a disc-type spindle, it is sometimes necessary to tilt the spindle slightly while immersing to avoid trapping air bubbles on its under side surface. (Brookeld recommends that you immerse the spindle in this fashion before attaching it to the Viscometer.)

2. Mount the guardleg on the DV-E Viscometer (LV and RV series). Be sure that the motor

is OFF before attaching the spindle. Select a spindle and attach it to the spindle coupling nut. Lift the shaft slightly, holding it rmly with one hand while screwing the spindle on

with the other (note left-hand thread). Avoid putting side thrust on the shaft.

3. To make a viscosity measurement, select a speed and follow the instructions in Sections II.2 and II.3. Allow time for the indicated reading to stabilize. The time required for stabilization

will depend on the speed at which the Viscometer is running and the characteristics of the sample uid. For maximum accuracy, ashing readings below 10% should be avoided. Additional information on making viscosity measurements is available in Appendix B or the Brookeld publication

4. Switch the

MOTOR ON/OFF switch to turn the motor “OFF” when changing a spindle or

“More Solutions to Sticky Problems”.

changing samples. Remove spindle before cleaning.

5. Interpretation of results and the instrument’s use with non-Newtonian and thixotropic

materials is discussed in the booklet, “More Solutions to Sticky Problems”, and in Appendix

B - Variables in Viscosity Measurement.

Brookeld Engineering Labs., Inc. Page 16 Manual No. M98-350-J0912

Appendix A - Viscosity Ranges

LV and RV,HA,HB Viscometers

Viscosity Range (cP)

Viscometer Minimum Maximum

LVDV-E 15 2 M RVDV-E 100* 13 M HADV-E 200* 26 M HBDV-E 800* 106 M

*Minimum viscosity with optional RV/HA/HB-1 spindle

Small Sample Adapter (SSA) and Thermosel (Tsel)

SSA/

Thermosel

Spindle

SC4-16 (SSA) 0.29 N 120 - 400 K SC4-18 (SSA/Tsel) 1.32 N 3 - 10 K SC4-25 (SSA) 0.22 N 800 - 1.60 K SC4-31 (SSA/Tsel) 0.34 N 30 - 100 K SC4-34 (SSA/Tsel) 0.28 N 60 - 200 K HT-81 (Tsel) 1.29 N 3.5 - 10 K SC4-82 (SSA) 1.29 N 3.5 - 10 K SC4-83 (SSA) 1.29 N 11.0 - 38 K

SSA/

Thermosel Spindle

SC4-14 (SSA) 0.40N 1.25K - 4.2 M SC4-15 (SSA) 0.48N 500 - 1.7 M SC4-21 (SSA/Tsel) 0.93N 50 - 170 K 100 - 300 K 400 - 1.3 M SC4-27 (SSA/Tsel) 0.34N 250 - 830 K 500 - 1.7 M SC4-28 (SSA/Tsel) 0.28N 500 - 1.7 M SC4-29 (SSA/Tsel) 0.25N 1 K - 3.3 M HT-81 (Tsel) 1.29N 36 - 10 K 73 - 10 K 292 - 10 K SC4-82 (SSA) 1.29N 36 - 10 K 73 - 10 K 292 - 10 K SC4-83 (SSA) 1.29N 121 - 50 K

Shear

Rate

(1/SEC)

Shear Rate

(1/SEC)

RVDV-E HADV-E HBDV-E

2.5 K - 8.3 M 10 K - 33.3 M 1 K - 3.3 M 4 K - 13.3 M

1 K - 3.3 M 4 K - 13.3 M 2 K - 6.7 M 8 K - 26.7 M

242 - 50 K 970 - 50 K

Viscosity (cP)

LVDV-E

Viscosity (cP)

2 K - 6.7 M

cP = Centipoise K = 1,000 M = 1,000,000 N = RPM

Brookeld Engineering Labs., Inc. Page 17 Manual No. M98-350-J0912

UL Adapter

Viscosity (cP)

Shear Rate

UL Spindle

YULA-15 or 15Z 1.224N 1.0 - 2 K 6.4 - 2 K 12.8 - 2 K 51.2 - 2 K

(1/SEC)

LVDV-E RVDV-E HADV-E HBDV-E

DIN Adapter Accessory

Viscosity (cP)

DAA Spindle

Shear Rate

(1/SEC)

LVDV-E RVDV-E HADV-E HBDV-E

85 1.29N 86 1.29N 87 1.29N

1.2 - 3.8 K 12 - 5 K 24 - 5 K 98 - 5 K 3 - 10 K 36 - 10 K 73 - 10 K 292 - 10 K 11 - 38 K 12 - 50 K 242 - 50 K 970 - 50 K

Spiral Adapter

Viscosity (cP)

Shear Rate

DAA Spindle

SA-70 0.68 - 68 100 - 98 K 1 M - 1 M 2 M - 2 M 8 M - 8.4 M

(1/SEC)

(1-100 RPM)

LVDV-E RVDV-E HADV-E HBDV-E

Helipath with T-Bar Spindles

T-Bar

Spindle

T-A 156 - 62 K 2 M - 400 K 4 M - 800 K 16 M - 3.2 M T-B 312 - 124 K 4 M - 800 K 8 M - 1.6 M 32 M - 6.4 M T-C 780 - 312 K 10 M - 2 M 20 M - 4 M 80 M - 16 M T-D 1.5 M - 624 K 20 M - 4 M 40 M - 8 M 160 M - 32 M T-E 3.9 M - 1.5 M 50 M - 10 M 100 M - 20 M 400 M - 80 M T-F 7.8 M - 3.1 M 100 M - 20 M 200 M - 40 M 800 M - 160 M

LVDV-E RVDV-E HADV-E HBDV-E

Viscosity (cP)

cP = Centipoise K = 1,000 M = 1,000,000 N = RPM

Brookeld Engineering Labs., Inc. Page 18 Manual No. M98-350-J0912

In taking viscosity measurements with the DV-E Viscometer, there are two considerations which

pertain to the low viscosity limit of effective measurement.

1) Viscosity measurements should be accepted within the equivalent % Torque Range from 10% to 100% for any combination of spindle/speed rotation.

2) Viscosity measurements should be taken under laminar ow conditions, not under turbulent ow conditions.

The rst consideration has to do with the accuracy of the instrument. All DV-E Viscometers have a

full scale range accuracy of (+/-) 1% of any spindle/speed rotation. We discourage taking readings below 10% of range because the potential viscosity error of (+/-) 1% is a relatively high number compared to the instrument reading.

The second consideration involves the mechanics of uid ow. All rheological measurements of

uid ow properties should be made under laminar ow conditions. Laminar ow is ow wherein all particle movement is in layers directed by the shearing force. For rotational systems, this means all uid movement must be circumferential. When the inertial forces on the uid become too great, the uid can break into turbulent ow wherein the movement of uid particles becomes random and the ow can not be analyzed with standard math models. This turbulence creates a falsely high viscometer reading with the degree of non-linear increase in reading being directly related to the degree of turbulence in the uid.

For the following geometries, we have found that an approximate transition point to turbulent ow

occurs:

1) No. 1 LV Spindle: 15 cP at 60 RPM

2) No. 1 RV (optional) Spindle: 100 cP at 50 RPM

3) UL Adapter: 0.85 cP at 60 RPM

Turbulent conditions will exist in these situations whenever the RPM/cP ratio exceeds the values listed

above. The viscosity at which turbulence starts is still at best a guess. Because it is a relationship between viscous and inertial forces, it can vary dramatically from uid to uid. Turbulence starts as a small deviation or increase in viscosity for a Newtonian uid. Basically there is no specic shear that it starts at, only an approximate region of shear depending on the uid.

Brookeld Engineering Labs., Inc. Page 19 Manual No. M98-350-J0912

Appendix B - Variables in Viscosity Measurement

As with any instrument measurement, there are variables that can affect a viscometer measurement.

These variables may be related to the instrument (viscometer), or the test uid. Variables related to the test uid deal with the rheological properties of the uid, while instrument variables would include the viscometer design and the spindle geometry system utilized.

Rheological Properties

Fluids have different rheological characteristics that can be described by viscometer measurements.

We can then work with these uids to suit the lab or process conditions.

There are two categories of uids:

Newtonian - These uids have the same viscosity at different Shear Rates (different

RPM’s) and are called Newtonian over the Shear Rate range they are measured.

Non-Newtonian - These uids have different viscosities at different shear rates (different

RPM’s). They fall into two groups:

1) Time Independent

2) Time Dependent

Time Independent means that the viscosity behavior does not change as a function of time when

measuring at a specic shear rate.

Pseudoplastic - A pseudoplastic material displays a decrease in viscosity with an increase

in shear rate, and is also known as “shear thinning”. If you take viscometer readings from a low to a high RPM and then back to the low RPM, and the readings fall upon themselves, the material is time independent pseudoplastic and shear thinning.

Time Dependent means that the viscosity behavior changes as a function of time when measuring

at a specic shear rate.

Thixotropic - A thixotropic material has decreasing viscosity under constant shear rate.

If you set a viscometer at a constant speed recording viscosity values over

time and nd that the viscosity values decrease with time, the material is

thixotropic.

Brookeld publication, “More Solutions to Sticky Problems”, includes a more detailed discussion

of rheological properties and non-Newtonian behavior.

Viscometer Related Variables

Most uid viscosities are found to be non-Newtonian. They are dependent on Shear Rate and the

spindle geometry conditions. The specications 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.

Brookeld Engineering Labs., Inc. Page 20 Manual No. M98-350-J0912

The shear rate of a given measurement is determined by: the rotational speed of the spindle, the

size and shape of the spindle, the size and shape of the container used and therefore, the distance between the container wall and the spindle surface.

A repeatable viscosity test should control or specify the following:

1) Test temperature

2) Sample container size (or spindle/chamber geometry)

3) Sample volume

4) Viscometer model

5) Spindle used (if using LVDV-E (#1-4) or RVDV-E (#2-7) attach the guard leg)

6) Test speed or speeds (or the shear rate)

7) Length of time or number of spindle revolutions to record viscosity.

Brookeld Engineering Labs., Inc. Page 21 Manual No. M98-350-J0912

Appendix C - Spindle and Model Codes

Appuuoijpoiendix C - Spindle and Model Codes

Each spindle has a two digit code which is scrolled via the select knob on the DV-E. The spindle code directs the DV-E to calculate viscosity for the spindle that is being used. The spindle multiplier constant (SMC) is used to calculate full scale viscosity range for any spindle/speed combination. Use of Guard Leg is required. Spindle codes are listed in Table C-1.

SPINDLE CODE SMC

01 RV1 (optional) 01 1 02 RV2 02 4 03 RV3 03 10 04 RV4 04 20 05 RV5 05 40 06 RV6 06 100 07 RV7 07 400 H01 HA1 H02 HA2 02 4 03 HA3 03 10 04 HA4 04 20 05 HA5 05 40 06 HA6 06 100 07 HA7 07 400 H01 HB1 H02 HB2 02 4 03 HB3 03 10 04 HB4 04 20 05 HB5 05 40 06 HB6 06 100 07 HB7 07 400 61 LV1 61 6.4 62 LV2 62 32 63 LV3 63 128 64 LV4 or 4B2 64 640 65 LV5 66 LV2C 66 32 67 LV3C 67 128 SA -70 Spiral 70 105 V-71 71 2.62

(optional) 01 1

(optonal) 01 1

(optional) 65 1280

SPINDLE CODE SMC

V-72 72 11.1 V-73 73 53.5 V-74 74 543 V-75 75 213 T-A 91 20 T-B 92 40 T-C 93 100 T-D 94 200 T-E 95 500 T-F 96 1000 ULA 00 0.64 DIN-ULA 85 1.22 TSEL-DIN-81 81 3.7 SSA-DIN-82 82 3.75 SSA-DIN-83 83 12.09 ULA-DIN-85 85 1.22 ULA-DIN-86 86 3.65 ULA-DIN-87 87 12.13 SC4-14 14 125 SC4-15 15 50 SC4-16 16 128 SC4-18 18 3.2 SC4-21 21 5 SC4-25 25 512 SC4-27 27 25 SC4-28 28 50 SC4-29 29 100 SC4-31 31 32 SC4-34 34 64

Table C-1

Brookeld Engineering Labs., Inc. Page 22 Manual No. M98-350-J0912

VISCOMETER TORQUE CONSTANT MODEL CODE

MODEL TK ON DV-E SCREEN

LVDV-E 0.09373 LV RVDV-E 1 RV HADV-E 2 HA HBDV-E 8 HB

SPECIAL ORDER TORQUE SPRINGS

VISCOMETER TORQUE CONSTANT MODEL CODE

MODEL TK ON DV-E SCREEN

2.5xLVDV-E 0.2343 2.5LV 5xLVDV-E 0.4686 5LV 1/4 RVDV-E 0.25 1/4RV 1/2 RVDV-E 0.5 1/2RV 2xHADV-E 4 2HA

2.5xHADV-E 5 2.5HA 2xHBDV-E 16 2HB

2.5xHBDV-E 20 2.5HB

Table C-2

This equation can be used to calculate the maximum viscosity that can be measured when using a specic speed/spindle combination.

Full Scale Viscosity Range (FSR) = TK * SMC *

10,000

RPM

The units for FSR are in centipoise (cP). An example is shown in Appendix D.

Brookeld Engineering Labs., Inc. Page 23 Manual No. M98-350-J0912

Appendix D - Calibration Check Procedures

Brookeld’s accuracy statement for viscometers used with standard spindles is +/- 1% of full scale range. When measuring viscosity with a specic spindle rotating at a dened speed, the maximum viscosity that can be measured is dened as full scale range. For digital viscometers, this value is easily determined by pressing the “AUTORANGE” key. The display will how the full scale range viscosity in cP or mPa•s and the torque value will show “100%”. Multiply the full scale range viscosity by 1% to determine the accuracy of any future measurement made with that spindle/speed combination.

When using the following accessory devices with your viscometer, the accuracy is +/- 2%. Dimensional tolerances in the accessory device allow for the increase from +/- 1% to +/-2%.

• Small Sample Adapter

• Thermosel

• Ul Adapter

• DIN Adapter

• Spiral Adapter

For more help you can go to the website,

www.brookeldengineering.com, and download the video.

The accuracy of the DV-E is veried using Viscosity Standard Fluids which are available from

Brookeld Engineering Laboratories or your local Brookeld agent. Viscosity standards are Newtonian, and therefore, have the same viscosity regardless of spindle speed (or shear rate).

Viscosity standards, calibrated at 25°C, are shown in Table D-1.

Container size: For Viscosity Standards < 30,000 cP, use a 600 mL Low Form Grifn Beaker

having a working volume of 500 mL.

For Viscosity Standards ≥ 30,000 cP, use the uid 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 uid standard label: ( Conditions: The DV-E should be set up according to the operating instructions. The water

bath should be stabilized at test temperature. Viscometers with the letters “LV” or “RV” in the model designation should have the guard leg attached when using

Viscosity Standard Fluids below 30,000 cP.

+/-) 0.1°C

Brookeld Engineering Labs., Inc. Page 24 Manual No. M98-350-J0912

Normal 25°C Standard Fluids

Viscosity (cP) Viscosity (cP)

High Temperature Standard Fluids for use

with Thermosel Accessory

HT-30,000 HT-60,000

HT-100,000

25°C, 93.3°C, 149°C

50 100 500

5,000 12,500 30,000 60,000

Calibrated at three viscosity/temperatures

100,000

1000

Refer to the Brookeld Catalog for more information.

Table D-1(Silicone Oils)

Brookeld Viscosity Standard Fluid - General Information

We recommend that Brookeld Viscosity Standard Fluids be replaced on an annual basis, one year

from date of initial use. These uids are pure silicone and are not subject to change over time. However, exposure to outside contaminants through normal use requires replacement on an annual basis. Contamination may occur by the introduction of solvent, standard of different viscosity or

other foreign material.

Viscosity Standard Fluids may be stored under normal laboratory conditions. Disposal should be

in accordance with state, local and federal regulations as specied on the material safety data sheet.

Brookeld Engineering Laboratories does not recertify Viscosity Standard Fluids. We will issue

duplicate copies of the Certicate of Calibration for any uid within two years of the purchase date.

Brookeld Viscosity Standard Fluids are reusable provided they are not contaminated. Normal

practice for usage in a 600 ml beaker is to return the material from the beaker back into the bottle. When using smaller volumes in accessories such as Small Sample Adapter, UL Adapter, Thermosel or Spiral Adapter, the uid is normally discarded.

Calibration Procedure for LV #1-3 (#61-63) and RV, HA, HB (#2-6) Brookeld spindles:

Note: The LV #4 (#64) and RV, HA, HB #7 have been omitted from this proce-

dure. Brookeld does not recommend the use of these spindles to perform a calibration check on your instrument. Reasons pertain to the small amount of sample surface area that makes contact with the viscosity standard, the difculty of establishing the immersion mark precisely and the need for precise temperature control at 25°C in the immediate vicinity of the spindle.

Follow these steps using one of the recommended spindles to verfy calibration on you instrument:

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

2) Lower the DV-E into measurement position (with guard leg if LV or RV series viscometer

is used).

3) Attach the spindle to the viscometer. If you are using a disk shaped spindle, avoid trapping

Brookeld Engineering Labs., Inc. Page 25 Manual No. M98-350-J0912

air bubbles beneath the disk by rst immersing the spindle at an angle, and then connecting it to the viscometer.

4) The viscosity standard uid, together with the spindle and guard leg (if supplied), should

be immersed in the bath for a minimum of 1 hour, stirring the uid periodically, prior to

taking measurements.

5) After 1 hour, check the temperature of the viscosity standard uid with an accurate thermometer. Fluid must be within ± 0.1°C of the specied temperature, normally 25°C. Allow longer soak time if required to come to test temperature.

6) If the uid is at test temperature, measure the viscosity and record the viscometer reading.

Note: The spindle must rotate at least ve (5) times before readings are taken.

7) The viscosity reading should equal to the cP value on the viscosity uid standard to within the combined accuracies of the viscometer and the standard (as discussed in Interpretation

of Calibration Test Results at the end of this Appendix).

Calibration Procedure for a Small Sample Adapter

When a Small Sample Adapter is used, the water jacket is connected to the water bath and the water

is stabilized at the proper temperature:

1) Put the proper amount of viscosity standard uid into the sample chamber. The amount varies with each spindle/chamber combination. (Refer to the Small Sample Adapter instruction manual.)

2) Place the sample chamber into the water jacket.

3) Put the spindle into the test uid and attach the extension link, coupling nut and free hanging

spindle (or directly attach the solid shaft spindle) to the DV-E.

4) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test

temperature.

5) Measure the viscosity and record the viscometer reading.

Note: The spindle must rotate at least ve (5) times before a viscosity reading is taken.

Calibration Procedure for a Thermosel System

A two-step process is recommended for the Thermosel.

A) Evaluate the calibration of the Viscometer alone according to the procedure outlined in

this section, entitled Calibration Procedure for LV #1-3 (#61-63) and RV, HA, HB #2-6

Brookeld spindles.

B) Evaluate the Viscometer with the Thermosel according to the procedure described below.

Brookeld Engineering Labs., Inc. Page 26 Manual No. M98-350-J0912

When a Thermosel is used, the controller stabilizes the Thermo Container at the test

temperature.

1) Install the tube end cap and put the proper amount of HT viscosity standard uid into the HT-2 or HT-2DB sample chamber. The amount varies with the spindle used. (Refer to the Thermosel instruction manual).

2) Place the sample chamber into the Thermo Container.

3) Put the spindle into the test uid and attach the extension link, coupling nut and free

hanging spindle (or directly attach the solid shaft spindle) to the DV-E.

4) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test

temperature.

5) Measure the viscosity and record the viscometer reading.

Note: The spindle must rotate at least ve (5) times before a viscosity reading is taken.

Calibration Procedure for UL Adapter

When a UL Adapter is used, the water bath should be stabilized at the proper temperature:

1) Install the tube end cap and put the proper amount of viscosity standard uid into the UL Tube. (Refer to the UL Adapter instruction manual).

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

3) Attach the tube to the mounting channel.

4) Lower the tube into the water bath reservoir, or if using the ULA-40Y water jacket, connect the inlet/outlets to the bath external circulating pump.

5) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test

temperature.

6) Measure the viscosity and record the viscometer reading.

Note: The spindle must rotate at least ve (5) times before a viscosity reading is taken.

Calibration Procedure for DIN Adapter Accessory

When a DIN Adapter is used, the water bath should be stabilized at the proper temperature:

1) Put the proper amount of viscosity standard uid into the UL Tube. (Refer to the DAA instruction manual).

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

Brookeld Engineering Labs., Inc. Page 27 Manual No. M98-350-J0912

3) Attach the tube to the mounting channel.

4) Lower the tube into the water bath reservoir, or if using the ULA-40Y water jacket, connect the inlet/outlets to the bath external circulating pump.

5) Allow 30 minutes for the viscosity standard, sample chamber and spindle to reach test

temperature.

6) Measure the viscosity and record the viscometer reading.

Note: The spindle must rotate at least ve (5) times before a viscosity reading is taken.

Calibration Procedure for Spiral Adapter

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

2) Attach the spindle to the viscometer. Attach chamber (SA-1Y) and clamp to the viscometer.

3) Lower the DV-E into measurement position. Operate the viscometer at 50 or 60 RPM until

the chamber is fully ooded.

4) The viscosity standard uid, together with the spindle, should be immersed in the bath for a minimum of 1 hour, stirring the uid periodically (operate at 50 or 60 RPM periodically),

prior to taking measurements.

5) After 1 hour, check the temperature of the viscosity standard uid with an accurate thermometer.

6) If the uid is at test temperature ( measure the viscosity and record the viscometer reading.

Note: The spindle must rotate at least ve (5) times or for one minute, whichever is greater before the readings are taken.

7) The viscosity reading should equal the cP value on the viscosity uid standard to within the

combined accuracies of the viscometer and the standard (as discussed in the section entitled, Interpretation of Calibration Test Results). However, instrument accuracy is ±2% of the

maximum viscosity range and not the standard 1%.

Interpretation of Calibration Test Results:

When verifying the calibration of the DV-E, the instrument and viscosity standard uid error

must be combined to calculate the total allowable error.

The DV-E is accurate to (

Brookeld Viscosity Standards Fluids are accurate to (+/-) 1% of their stated value.

+/-) 1% of any full scale spindle/speed viscosity range.

+/- 0.1°C of the specied temperature, normally 25°C),

EXAMPLE 1: Calculate the acceptable range of viscosity using RVDV-E with RV-3 Spindle

at 2 RPM; Brookeld Standard Fluid 12,500 with a viscosity of 12,257 cP at 25°C:

Brookeld Engineering Labs., Inc. Page 28 Manual No. M98-350-J0912

1) Calculate full scale viscosity range using the equation:

Full Scale Viscosity Range

[cP] = TK

SMC

Where: TK = 1.0 from Table C-2 (in Appendix C) SMC = 10 from Table C-1 (in Appendix C)

Full Scale Viscosity Range =

1 * 10 * 10,000

10,000

RPM

= 50,000 cP

The viscosity is accurate to (

2) The viscosity standard uid is 12,257 cP. Its accuracy is (

(

+/-)122.57 cP.

+/-) 500 cP (which is 1% of 50,000)

+/-)1% of 12,257 or

3) Total allowable error is (122.57

4) Therefore, any viscosity reading between 11,634.4 and 12,879.6 cP indicates that the

viscometer is operating correctly. Any reading outside these limits may indicate a viscometer problem. Contact the Brookeld technical sales department or your local Brookeld dealer/ distributor with test results to determine the nature of the problem.

EXAMPLE 2: Calculate the acceptable range of viscosity using RVDV-E with Small Sample

Adapter at 10RPM; Brookeld Standard Fluid 12,500 with a viscosity of 12,257

cP at 25°C:

1) Determine full scale range by pressing the “AUTORANGE” key on your instrument, The display shows 25,000cP. The viscosity is accurate to +/- 500 cP (which is 2% of 25,000 cP).

2) The viscosity standard uid is 12,257 cP. Its accuracy is (

(

3) Total allowable error is (122.57

4) Therefore, any viscosity reading between 11,634.4 and 12,879.6 cP indicates that the

+/-)122.57 cP.

+ 500) cP = (+/-) 622.57 cP.

+/-)1% of 12,257 or

+ 500) cP = (+/-) 622.57 cP.

Brookeld Engineering Labs., Inc. Page 29 Manual No. M98-350-J0912

Appendix E - Model A Laboratory Stand

UP/DOWN KNOB

VISCOMETER HEAD CLAMP KNOB

TENSION SCREW

BROOKFIELD LABORATORY VISCOMETER

ITEM PART #

VS-CRA-14S

1 2

VS-1 VS-3

3 4

VS-21 BLM-4E

5 6

VSXA-17A

*for use with Thermosel and Water Baths

UPRIGHT ROD AND CLAMP ASSEMBLY BASE LEVELING SCREW

JAM NUT ROD EXTENSION - 4” LONG *

CLAMP ASSEMBLY FOR EXPLOSION PROOF

DESCRIPTION

Figure E-1

QTY.

1 1 3

1 OPTIONAL OPTIONAL

Brookeld Engineering Labs., Inc. Page 30 Manual No. M98-350-J0912

Unpacking

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

1 base (VS-1) 1 jam nut (VS-21) 3 leveling screws (VS-3) 1 clamp and rod assembly (VS-CRA-14S)

Open and discard all packaging materials for the base. Remove the three (3) leveling screws from

the base. Remove the jam nut from the upright rod.

Assembly (Refer to Figure E-1)

Screw the leveling screws into the base. Insert the threaded end of the upright rod into the hole in

the top of the base and attach the jam nut to the rod on the underside of the base. With the clamp and rod assembly facing forward (the word “front” should be facing the operator), towards the open part of the “V” in the base, gently tighten the jam nut.

Viscometer Mounting

The VS-CRA-14S clamp and rod assembly should be positioned so that the word ‘front’ is facing

the operator. This will ensure the cut-away slot of the clamp assembly will align properly with the machined key ridge of the viscometer handle. Insert the viscometer rod into the cut-away hole of the clamp assembly. Adjust the instrument level until the bubble is centered within the target and tighten the clamp knob.

The tension screw (see Item #1, Figure E-1) on the front side of the clamp assembly should be loosened or tightened as necessay to provide smooth height adjustment and adequate support for the Viscometer.

Center the Viscometer relative to the stand base and retighten the jam nut as required. Refer ring

to the Viscometer bubble level, adjust the leveling screws until the instrument is level.

Operation

Rotate the Up/Down Knob (see Figure E-1) to raise or lower the viscometer.

Brookeld Engineering Labs., Inc. Page 31 Manual No. M98-350-J0912

Appendix F - The Brookeld Guardleg

The guard leg was originally designed to protect the spindle during use. The rst applications

of the Brookeld Viscometer included hand held operation while measuring uids in a 55 gallon drum. It is clear that under those conditions the potential for damage to the spindle was great.

The current guard leg is a band of metal in the shape of the letter U with a bracket at the

top that attaches to the pivot cup of a Brookeld Viscometer/Rheometer. A guard leg is supplied with all LV and RV series instruments, but not with the HA or HB series. It’s shape is designed to accommodate the spindles of the appropriate spindle set; therefore, the RV

guard leg is wider than the LV, as shown in Figure F-1, due to the large diameter of the RV

#1 (optional) spindle. They are not interchangeable.

The calibration of the Brookeld Viscometer/Rheometer is determined using a 600 ml Low

Form Grifn Beaker. The calibration of LV and RV series instruments includes the guard leg. The beaker wall (for HA/HB instruments) or the guard leg (for LV/RV instruments) dene what is called the “outer boundary” of the measurement. The spindle factors for the LV, RV, and HA/HB spindles were developed with the above boundary conditions. The spindle factors are used to convert the instrument torque (expressed as the dial reading or %Torque value) into centipoise. Theoretically, if measurements are made with different boundary conditions, e.g., without the guard leg or in a container other than 600 ml beaker, then the spindle factors found on the Factor Finder cannot be used to accurately calculate an absolute viscosity. Changing the boundary conditions does not change the viscosity of the uid, but it does change how the instrument torque is converted to centipoise. Without changing the spindle factor to suit the new boundary conditions, the calculation from instrument torque to viscosity will be incorrect.

Practically speaking, the guard leg has the greatest effect when used with the #1 & #2 spindles

of the LV and RV spindle sets. Any other LV (#3 & #4) or RV (#3 - #7) spindle can be used in a 600 ml beaker with or without the guard leg to produce correct results. The HA and HB series Viscometers/Rheometers are not supplied with guard legs in order to reduce the potential problems when measuring high viscosity materials. HA/HB spindles #3 through #7 are identical to those spindle numbers in the RV spindle set. The HA/HB #1 & #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 follow the 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 difcult for

some customers to follow. The guard leg is one more item to clean. In some applications the 500 ml of test uid required to immerse the spindles in a 600 ml beaker is not available. In practice, a smaller vessel may be used and the guard leg is removed. The Brookeld Viscometer/Rheometer will produce an accurate and repeatable torque reading under any measurement circumstance. However, the conversion of this torque reading to centipoise will only be correct if the factor used was developed for those specic conditions. Brookeld has outlined a method for recalibrating a Brookeld Viscometer/Rheometer to any measurement circumstance in “More Solutions to Sticky Problems”, Section 3.3.10. It is important to note that for many viscometer users, the true viscosity is not as important as a repeatable day to day value. This repeatable value can be obtained without any special effort for any measurement circumstance. But, it should be known that this type of torque reading will not convert into a correct centipoise value when using a Brookeld factor if the boundary conditions are not those specied by Brookeld.

Brookeld Engineering Labs., Inc. Page 32 Manual No. M98-350-J0912

The guard leg is a part of the calibration check of the Brookeld 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 modications to the recommended method of operation to suit their needs.

5 7/8

B-21KY

Guard Leg

For RV Torque

3 3/16

B-20KY

Guard Leg

For LV Torque

5 5/32

1 7/16

Figure F-1

Brookeld Engineering Labs., Inc. Page 33 Manual No. M98-350-J0912

Appendix G - Fault Diagnosis and Troubeshooting

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

DV-E Viscometer. Review these items before you contact Brookeld.

Spindle Does Not Rotate

o Make sure the viscometer is plugged in. o Check the voltage rating on your viscometer (115V, 220V): it must match the wall voltage.

o Make sure the power switch is in the ON position.

o Make sure the speed set knob is set properly and securely at the desired speed.

Spindle Wobbles When Rotating or Looks Bent

o Make sure the spindle is tightened securely to the viscometer coupling.

o Check the straightness of all other spindles; replace them if bent. o Inspect viscometer coupling and spindle coupling mating areas and threads for dirt: clean

threads on spindle coupling with a 3/56 left-hand tap.

o Inspect threads for wear; if the threads are worn, the unit needs service (see Appendix I).

o Check to see if spindles rotate eccentrically or wobble. There is an allowable runout for 1/32-

inch in each direction (1/16-inch total) when measured from the bottom of the spindle rotating

in air.

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

If the pointer sticks and/or does not rest at zero, the unit is in need of service. See Appendix I for

details on how to return your viscometer.

Inaccurate Readings

o Verify spindle, speed and model selection

o Verify test parameters: temperature, container, volume, method. Refer to:

• “More Solutions to Sticky Problems”; Section II.2a — Considerations for Making

Measurements

• Dial Viscometer Operating Manual; Appendix A — Viscosity Ranges

• Dial Viscometer Operating Manual; Appendix B — Variables in Viscosity Measurement

o 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 I).

Brookeld Engineering Labs., Inc. Page 34 Manual No. M98-350-J0912

Appendix H - Online Help and Other Resources

www.brookeldengineering.com**

The Brookeld 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/BrookeldEng

Brookeld has its own YouTube channel. Videos posted to our website can be found here as well as other “home-made” videos made by our own technical sales group.

Viscosityjournal.com

Brookeld is involved with a satellite website that should be your rst stop in viscosity research. This site serves as a library of interviews with experts in the viscosity eld as well as Brookeld technical articles and conversion charts. Registration is required so that you can be notied of upcoming interviews and events, however, this information will not be shared with other vendors, institutions, etc.

Article Reprints

- Available in Print Only

- Brookeld has an extensive library of published articles relating to viscosity, texture

and powder testing. Due to copyright restrictions, these articles cannot be emailed. Please request a hardcopy of articles by calling our customer service department or by emailing: marketing@brookeldengineering.com.

- Available online

- Brookeld has a growing number of published articles that can be downloaded directly

from the Brookeld website. These articles can be found on our main website by following this path: http://www.brookeldengineering.com/support/documentation/article reprints

Brookfield DV-E Viscometer User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual