Brookfield DV-I Viscometer User Manual

BROOKFIELD DIGITAL VISCOMETER

MODEL DV-I+

Operating Instructions

Manual No. M/92-021-O604

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

Model No.

Serial No.

SPECIALISTS IN THE
MEASUREMENT AND
CONTROL OF VISCOSITY

BROOKFIELD ENGINEERING LABORATORIES, INC.

11 Commerce Boulevard, Middleboro, MA 02346-1031 USA

T

EL

800-628-8139 or 508-946-6200 FAX [phone]

www.brookfieldengineering.com

Brookfield Engineering Laboratories, Inc. Page 1 Manual No. M/92-021-O604

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 ............................................................................................... 43

Appendix J - Fault Diagnosis and Troubleshooting.................................................................... 44

Appendix K - Warranty Repair and Service................................................................................. 46

Appendix L - Viscosity T est Report............................................................................................. 49

Brookfield Engineering Laboratories, Inc. Page 2 Manual No. M/92-021-O604

I. INTRODUCTION

The Brookfield DV-I+ Viscometer measures fluid viscosity at given shear rates. Viscosity is a
measure of a fluid’ s resistance to flow . You will find a detailed description of the mathematics of
viscosity in the Brookfield publication “More Solutions to Sticky Problems” a copy of which
was 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 the
spring deflection. Spring deflection is measured with a rotary transducer. The measurement
range of a DV-I+ (in centipoise or milliPascal seconds) is determined by the rotational speed of
the spindle, the size and shape of the spindle, the container the spindle is rotating in, and the full
scale torque of the calibrated spring.

There are four basic spring torque series offered by Brookfield:

Spring Torque

Model dyne-cm milli Newton-m

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

The higher the torque calibration, the higher the measurement range. The viscosity measurement
range 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 sys­tem.

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

mPa•s) on the DV-I+ Viscometer display.

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

both cases) on the DV-I+ Viscometer 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 = 107 dyne-cm

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

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I.1 Components

Component Part Number Quantity

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

LVDV-I+ set of four spindles or (SSL) 1
RVDV-I+ set of six spindles (#2 through #7) (SSR) 1
HA/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 1
Power Cord DVP-65 1
Guardleg

(not supplied with HA/HB or Cone/Plate versions)

LVDV-I+ B-20Y 1
RVDV-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 pertaining
specifically to DV-I+ Viscometers with temperature probe option.

Tp

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

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

I.2 Utilities

Input Voltage: 115 VAC or 230 VAC
Input Frequency: 50/60 Hz
Power Consumption: 22 WATTS

Power Cord Color Code:

United States Outside United States

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

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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 kg

Net Weight 17 lb 7.7 kg
Carton Volume 1.65 cu ft 0.05 m

Tp

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

3

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 for: Electromagnetic Compatibility (EMC), Low Voltage

(LVD) and Safety Requirements for electrical equipment for measurement control and
laboratory use.

Certified to the applicable CSA and ANSI/UL Standards, for use in Canada and the
United States.

Installation Category II, Pollution Degree 2, Altitude 2000m (max).

I.4 Set-Up

1) To assemble the Model S Laboratory Stand, place the upright rod into the base (refer

to assembly instructions in Appendix H). The rack gear and clamp assembly should
face the front of the base. The upright rod is held in place with a screw which is
attached from the bottom of the base. Tighten this screw with a screwdriver.

2) Insert the mounting rod on the back of the DV-I+ Viscometer into the hole on the

clamp 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 as

possible while tightening the clamp screw.

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Tp

4) Connect the optional RTD temperature probe to the temperature port
rear panel of the DV-I+, if provided.

5) The Viscometer must be level. The level is adjusted using the two Leveling Screws

(VS-3) on the base. Adjust so that the bubble level on top of the DV-I+ is centered
within the 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 it
into the appropriate AC line.

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

on the name plate of the viscometer. The DV-I+ must be earth grounded to ensure
against electronic failure!

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

I.5 Safety Symbols and Precautions

Safety Symbols

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

on the

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 from
the wall outlet.

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

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I.6 Key Functions

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

UP ARROW

This key is used to scroll UP (in an increasing
value direction) through the available speed or

MOTOR
ON/OFF

AUTO

RANGE

spindle tables.

DOWN ARROW

This key is used to scroll DOWN (in a decreasing
value direction) through the available speed or
spindle tables.

Tp

Note: Pressing and holding the DOWN ARROW key

during the POWER ON will enable the
temperature display to be read in °C or °F.
See Section II.1.

MOTOR
ON/OFF

MOTOR ON/OFF

Turns the motor ON or OFF.

SET

SPEED

SET SPEED

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

AUTO

RANGE

AUTO RANGE

Presents the maximum (100% torque) viscosity attainable (known as full scale range) for the
spindle speed selected. This feature is functional when the motor is running. Viscometer
allowable error is 1% of the maximum (100% torque) viscosity value; minimum recommended
viscosity range is 10% of the maximum viscosity value.

SET

SPEED

Figure I-1

SELECT

SELECT

SPINDLE

SPINDLE

Note: Pressing and holding the AUTO RANGE key during power on will enable the

viscosity display to be changed between CGS and SI units (see Section II.5).

SELECT

SELECT
SPINDLE

SPINDLE

SELECT SPINDLE

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

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I.7 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-abra-

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

or cleaners.

sive 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 Auto Zero

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

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

BROOKFIELD DV-I+
RV VISCOMETER

Figure II-1

After a few seconds, the following screen appears:

BROOKFIELD DV-I+
VERSION 5.1

Figure II-2

No key press is required at this point. After a short time, the display will clear and the following
will 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 will
flash “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:

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cP 0.0 S01

0.0RPM % 0.0

(without Temperature Probe)

Spindle Selected

Calculated Viscosity (cP or m•Pas)

Speed

cP 123E3 70.1°F

0.0RPM % 0.0

(with Temperature Probe)

Figure II-5

Temperature (if available)
% T orque

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, the

viscosity value is 123,000 cP.

II.2 Spindle Selection

LVDV-I+ V iscometers 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+
V iscometers come with a set of six spindles and no guardleg. (See Appendix E for more informa­tion on the guardleg.)

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

The DV-I+ requires a Spindle Entry Code number to calculate viscosity values. The two digit
entry 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 power

was 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 to
begin to blink . It will blink for about three seconds. If the UP or DOWN ARROW keys are pressed
(while

SS

S is blinking) the two character spindle value to the right of the

SS

SS

S character will begin to

SS

change (in either an increasing or decreasing direction depending upon which ARROW key is
pressed) for each press of the key. If the ARROW key is pressed and held, the display will scroll
through the spindle codes for as long as the ARROW key is depressed. When it reaches the last
item 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

SS

S character to cease blinking and

SS

the new spindle code will be accepted for use in viscometer calculations.

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NOTE: You have approximately three seconds in which to press the SELECT SPINDLE

key before the blinking stops. If you fail to press the SELECT SPINDLE key
before the blinking stops you will have to repeat the above steps and re-select the
desired spindle.

The DV-I+ will begin to calculate using the new spindle parameters as soon as the SELECT

SPINDLE key is pressed the second time.

II.2.2 Spindle Section for Models WITH Temperature Display

Tp

The steps for selecting and accepting a spindle entry are the same as Section II.2.1 except that

SELECT SPINDLE is depressed, the temperature display is temporarily replaced by the spindle

when
entry code until the entry code is accepted (Figure II-6):

cP 123.4 SP31
10 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°F

0.0RPM % 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 special
spindles.

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II.3 Speed Selection & Setting

Table II-1 shows the available speed selections.

DV-I+ SPEEDS SETS

LV RV/HA/HB

Beginning

0.0 0.0

Beginning

0.3 0.5

When scrolling

“UP”

0.6 1.0

1.5 2.0

When scrolling

“UP”

3.0 2.5

6.0 4.0

12.0 5.0

30.0 10.0

60.0 20.0

0.0 50.0

0.5 100.0

1.0 0.0

2.0 0.3

2.5 0.6

4.0 1.5

5.0 3.0

10.0 6.0

20.0 12.0

50.0 30.0

100.0 60.0

Table II-1

The DV-I+ may also be programmed with “special” speed sets. A list of special speed sets is
included in Appendix F. Please consult Brookfield Engineering or your local dealer/distributor
for 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 the
area 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

Operating Speed

10RPM10 % 87.2

Figure II-8

If the ARROW key is pressed just once and then released, the characters
seconds, 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 that

the next time you initiate a speed change (by pressing an ARROW key), the DV­I+ 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

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Flashing “Selectable” Speed

RPMRPM

RPM will blink for three

RPMRPM

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

cP 872.0 S01

Operating Speed Scrolled to Selected Speed

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
I+ by pressing

MOTOR ON/OFF once again, you would again be running at 10 RPM. However , if

while the motor was off you had scrolled to a new speed of 20 RPM, pressing the MOTOR ON/OFF
key would start the DV-I+ running at 20 RPM.

NOTE: During both spindle or speed selection and scrolling operations, the DV-I+ will

continue to calculate and display viscosity (cP) and torque (%).

10RPM20 % 87.2

Figure II-9

MOTOR ON/OFF and then re-started the DV-

II.4 Autorange

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

NOTE: If the motor is off or the RPM is 0.0, the maximum viscosity displayed will be 0.0

cP (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 to
be 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.

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CGS SI

Viscosity cP mPa.s

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

Pressing and holding the DOWN ARROW key during power on will enable the temperature display
to 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 in

the 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) readings
exceed 100.0 % (over-range), the display changes to that shown in Figure II-12:

cP EEEE S01
10 RPM % EEEE

Figure II-12

You must change either speed or spindle to correct this condition. If you operate at spindle
speeds that produce % (T orque) below 10.0 % (under-range), the DV -I+ flashes both % (Torque)
and cP (Viscosity) on and off:

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.

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II.8 Operation

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

1. Mount the guardleg on the DV-I+ Viscometer (LV and RV series). Attach the spindle to

the lower shaft. Lift the shaft slightly, holding it firmly with one hand while screwing the
spindle on with the other (note left-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 groove
in the spindle's shaft. With a disc-type spindle, it is sometimes necessary to tilt the spindle
slightly while immersing to avoid trapping air bubbles on its surface. (You may find it more
convenient to immerse the spindle in this fashion before attaching it to the Viscometer.)

3. To make a viscosity measurement, select the desired speed setting. Allow time for the
indicated reading to stabilize. The time required for stabilization will depend on the speed
at which the Viscometer is running and the characteristics of the sample fluid. For
maximum accuracy, readings below 10% should be avoided. Additional information on
making viscosity measurements is available in Appendix 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 or

changing samples. Remove spindle before cleaning. Clean spindles after use.

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 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 Torque
capabilities with the DV-I+ V iscometer. 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) or
until a set torque value is attained (Time to Torque). A series of menus will ask the user to input
minutes and seconds (Timed Stop) or % torque (T ime to Torque) and will then begin timing when
the user presses the MOTOR ON/OFF key to ON. A message will be displayed showing time
remaining (or time elapsed) and the appropriate display item (viscosity or torque) will be updated
continuously during the event. Upon completion, the viscometer will display a screen stating that
the 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 UP
or DOWN arrow keys will allow alternate data to be examined and pressing any other key will
bring the user back to the default (normal) viscometer display with the motor OFF. If the user
wishes 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 meaningless
showing no viscosity values.

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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 the

motor 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 either

of 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 is
immediately 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 presented

with 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 of
the 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 setting
display:

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 of
the 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 able

to exit this mode.

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

TIMED STOP:PRESS
MOTOR ON OFF

Figure II-18

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/

3. At this point, the user need only press the MOTOR ON/OFF key to begin the timed stop
operation. Any other key will abort the process and the user will have to begin again by
simultaneously 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 presented

with the following screen for the duration of the timed run:

cP 123456789
MIN: 15 SEC:13

Figure II-19

NOTE: When this mode has begun, a press of the MOTOR ON/OFF key will interrupt

the 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. When
seconds reaches zero (0), the minutes value will decrement by one (1) minute. This will
continue until all of the time has elapsed at which point the viscometer will display the
following screen:

cP 123456789
TIMED STOP DONE

Figure II-20

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

%=76.4 RPM=100
TIMED STOP DONE

Figure II-21

The display will switch between that of Figures II-20 and II-21 for each press of either the

UP or DOWN ARROW key. Pressing any key except the UP or DOWN ARROW keys will cause

the 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 the

time interval in EEPROM so that it will become the default the next time the user
elects 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 is
presented with the following screen:

Brookfield Engineering Laboratories, Inc. Page 17 Manual No. M/92-021-O604

TIMED TORQUE
SET TORQUE: 00%

Figure II-22

Using the UP and DOWN ARROW keys, the user enters a value for the torque level which
the 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 able

to exit this mode.

2. The user presses the

SELECT SPINDLE key one more time to end the torque input at which

point 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 torque
operation. Any other key will abort the process and the user will have to begin again by
simultaneously 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 presented
with 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 the

time 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 the
current value of the viscometer torque will be updated continuously. When seconds reach
59, the minutes value will increment by one (1) minute. This will continue until the user
selected torque value is attained at which point the viscometer will display the following
screen:

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 until
the user presses the UP or DOWN ARROW keys to view the viscosity that was current at the
Timed Torque completion. The display would appear as follows:

Brookfield Engineering Laboratories, Inc. Page 18 Manual No. M/92-021-O604

CP 123456789
TIMED TORQ DONE

Figure II-26

The display will switch between that of Figures II-25 and II-26 for each press of either the

UP or DOWN ARROW key. Pressing any key except the UP or DOWN ARROW key will cause

the 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 entered

torque in EEPROM for use when the user elects to perform a time to torque test
again.

Brookfield Engineering Laboratories, Inc. Page 19 Manual No. M/92-021-O604

Appendix A - Cone/Plate Viscometer Set-Up

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

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 at
Brookfield prior to shipment.

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

A.1 ELECTRONIC GAP SETTING FEATURES

TOGGLE SWITCH allows you to enable/disable

the Electronic Gap Setting Feature: left posi­tion is OFF (disabled), right position is ON (en­abled).

PILOT LIGHT is the red (LED) light; when illu-

minated, it means the Electronic Setting Func­tion is sensing (enabled).

CONTACT LIGHT is the yellow (LED) light;

when it first turns on, the “hit point” has been
found.

SLIDING REFERENCE MARKER is used after

finding the “hit point;” it is the reference for
establishing the 0.0005 inch gap.

MICROMETER ADJUSTMENT RING is used to

move the cup up or down in relation to the cone
spindle. Turning the ring left (clockwise) low­ers the cup; turning it right (counterclockwise)
raises the cup. Each line on the ring represents
one scale division and is equivalent to 0.0005
inch movement of the plate relative to the cone.

Pilot Light

(red)

Toggle Swtich

Contact Light

(yellow)

Sliding Reference

Adjustment Ring

Marker

Micrometer

Figure A-1

Brookfield Engineering Laboratories, Inc. Page 20 Manual No. M/92-021-O604

A.2 SETUP

1. Be sure that the Viscometer is securely
mounted to the Laboratory Stand, leveled and
zeroed with no cone or cup attached and 0%
torque is displayed.

2. Figure A-2 shows a typical water bath setup.
Connect the sample cup inlet/outlet ports to
the water bath inlet and outlet and set the bath
to the desired test temperature. Allow suffi­cient time for the bath to reach the test tem­perature.

3. The Viscometer has been supplied with a
special cone spindle(s) which contains the
Electronic Gap Setting feature. The “CPE”
part number designation on the cone verifies
the Electronic Gap Setting feature. Note: The
“CPE” cone or cup cannot be used with earlier
DV-I+ cone/plate Viscometers (below S/
N50969) which do not have the electronic gap
setting feature.

Bath

Outlet

Bath/Circulator

Micrometer
Adjustment

Ring

Bath
Inlet

Figure A-2

Cup

Outlet

Cup
Inlet

Sample

Cup

(CPE-44Y

or

CPE-44P)

4. With the motor off, thread the cone spindle by
using the spindle wrench to secure the vis­cometer coupling nut (see Figure A-3); gen­tly push up on the coupling nut and hold this
securely with the wrench. Thread the cone
spindle by hand. Note: Left Hand Threads.

5. Attach the cup, taking care not to hit the cone
with the cup (Figure A-4). There must be no
fluid in the cup.

The viscosity of “electrically conductive” flu­ids may be affected if readings are taken with
the Electronic Gap Setting feature “on”. Be sure
to shut the feature “off” before taking readings!

Spindle
Wrench

(CPE) Cone

Do Not hit the

CONE with the CUP!

Coupling Nut

These surfaces

must be clean!

Figure A-3

Figure A-4

Brookfield Engineering Laboratories, Inc. Page 21 Manual No. M/92-021-O604

A.3 SETTING THE GAP

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

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

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

Continue moving the micrometer adjustment
ring slowly counter-clockwise until the con­tact light (yellow) turns on. Back off (rotate
clockwise) until the light is just breaking
contact, i.e., flickering.

Moves Away

from Hit Point

(clockwise)

LEFTx

Figure A-5

Moves Towards

Hit Point

(counter-clockwise)

RIGHT

4. Adjust the sliding reference marker, right or
left, to the closest full scale division mark (see
Figure A-6).

5. Turn the micrometer adjustment ring one scale
division to the left to meet the line on the
sliding reference marker. THE YELLOW
CONTACT LIGHT SHOULD GO OFF.

6. You have established the gap space needed for
measurement. Now turn the toggle switch
OFF (left); the red pilot light should go off.

7. Carefully remove the sample cup.

Notes

1. 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.

Full Scale

Division Marks

Figure A-6

Sliding

Reference

Marker

Brookfield Engineering Laboratories, Inc. Page 22 Manual No. M/92-021-O604

A.4 VERIFYING CALIBRATION

1. Determine the appropriate sample volume.
Refer to Table A-1 to determine the correct
sample volume required for the spindle to be
utilized.

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

Table A6

Cone Sample Volume

Part No.

CPE-40 0.5 ml
CPE-41 2.0 ml
CPE-42 1.0 ml
CPE-51 0.5 ml
CPE-52 0.5 ml

Table A-1

Do not use a silicone viscosity standard fluid
with a viscosity value greater than 5000 cP
with a Cone/Plate. Brookfield offers a com­plete range of mineral oil viscosity standards
suitable for use with Cone/Plates for viscosi­ties above 5,000 cP or shear rates above 500
sec-1; see Table E1 in Appendix E for a list of
available fluids.

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

Example: LVDV-I+ Viscometer, Cone

Spindle CPE-42, Brookfield
Silicone Viscosity Standard
having 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 should
be 97% torque and 9.7 cP viscosity ± 0.197
(closer to ±0.2) cP. The accuracy is a combi­nation of Viscometer and fluid tolerance (re­fer to Interpretation of Calibration Test
Results in Appendix E).

4. Attach the sample cup to the Viscom­eter and allow sufficient time for the
sample, cup and cone to reach tem­perature equilibrium.

5. Turn the motor on. Set the desired
speed(s). Measure the viscosity and
record the reading in both % torque
and centipoise (cP).

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

6. Verify that the viscosity reading is
within the allowable 1% deviation, as
explained earlier, for the specific vis­cosity standard fluid(s) that you are
using.

* The CPE designation on the cone

spindle indicates use with Electronic
Gap Setting Cone/Plate Viscometers/
Rheometers only.

3. With the motor off, remove the sample cup
and place the viscosity standard fluid into the
cup.

Brookfield Engineering Laboratories, Inc. Page 23 Manual No. M/92-021-O604

Appendix B - Viscosity Ranges

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

Viscosity Range (cP)

Viscometer Minimum Maximum

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

Vane Spindles

Spindle Torque Shear Stress Range Viscosity Range cP

Range Pa dyne/cm (mPa•s) @ 10 rpm

2

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

(4)

V-74
V-71 HA 1-10 10-100 524 - 5240

V-72 HA 4-40 40-400 2220 - 22200
V-73 HA 20-200 200-2000 10700 - 107000

(4)

V-74
V-71 HB 4-40 40-400 2096 - 20960

V-72 HB 16-160 160-1600 8880 - 88800
V-73 HB 80-800 800-8000 42800 - 428000

(4)

V-74
V-71 5xHB 20-200 200-2000 10480 - 104800

2

V-72 5xHB 80-800 800-8000 44400 - 444000
V-73 5xHB 400-4000 4000-40000 214000 - 2140000

(4)

V-74

Notes: 1) 1 Pa = 10 dyne/cm

2) 1 cP = 1 mPa•s

3) Possibility of turbulence at speeds above 10 rpm may give artificially higher viscosity readings.

(4)

V-74 not in the firmware for the DV-I+ spindle table. Manual calculations are required to convert
torque readings to shear stress and viscosity values.

Brookfield Engineering Laboratories, Inc. Page 24 Manual No. M/92-021-O604

Small Sample Adapter and Thermosel

SSA and Viscosity (cP) Shear

Thermosel Rate

Spindle LVDV-I+ sec-1

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

SSA and Viscosity (cP) Shear

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

UL Adapter

Viscosity (cP)

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 1.22N
ULA-DIN-Y 1 - 3,800 11 - 5,000 22 - 5,000 85 - 2,000 1.29N

DIN Adapter Accessory

Viscosity (cP)

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 1.22N
86 4 - 3,800 37 - 10,000 73 - 10,000 292 - 10,000 1.29N
87 11 - 38,000 121 - 50,000 243 - 50,000 970 - 50,000 1.29N

Shear

Rate

Shear

Rate

Brookfield Engineering Laboratories, Inc. Page 25 Manual No. M/92-021-O604

Spiral Adapter

Viscosity (cP)

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 -

Cone/Plate Viscometer

Viscosity (cP)

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 7.5N
CPE-41 1.15 - 3,840 12 - 41,000 25 - 82,000 98 - 328,000 2.0N
CPE-42 .60 - 2,000 6 - 21,300 13 - 42,600 51 - 170,400 3.84N
CPE-51 4.8 - 16,178 51.8 - 172,600 103.4 - 345,200 414.2 -1,381,000 3.84N
CPE-52 9.3 - 31,000 99.2 - 330,700 198.4 - 661,500 793.6 -2,646,000 2.0N

Helipath with T-Bar Spindles

Shear

Rate

.67.7N

(1-100 RPM

Shear

Rate

)

Viscosity (cP)

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

In taking viscosity measurements with the DV-I+ V iscometer there are two considerations which
pertain to the low viscosity limit of effective measurement.

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

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

The first consideration has to do with the accuracy of the instrument. All DV-I+ Viscometers
have a full scale range allowable error of (+/-) 1% of any spindle/speed in use. 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 fluid flow . All rheological measurements of
fluid flow properties should be made under laminar flow conditions. Laminar flow is flow wherein

Brookfield Engineering Laboratories, Inc. Page 26 Manual No. M/92-021-O604

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

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

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

2) No. 1 RV Spindle: 100 cP at 50 RPM (optional spindle available from Brookfield)

3) UL Adapter: 0.85 cP at 60 RPM

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

Brookfield Engineering Laboratories, Inc. Page 27 Manual No. M/92-021-O604

Appendix C - Variables in Viscosity Measurement

As with any instrument measurement, there are variables that can affect a viscometer measurement.
These variables may be related to the instrument (viscometer), or the test fluid. Variables related to the
test fluid deal with the rheological properties of the fluid, while instrument variables would include the
viscometer design and the spindle geometry system utilized.

Rheological Properties

Fluids have different rheological characteristics that can be described by viscometer measurements.
We can then work with these fluids to suit the lab or process conditions.

There are two categories of fluids:

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

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

Non-Newtonian - These fluids have different viscosities at different shear rates (different

RPM’s). They fall into 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 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 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 specific 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 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.

Brookfield Engineering Laboratories, Inc. Page 28 Manual No. M/92-021-O604

Viscometer Related Variables

Most fluid viscosities are found to be non-Newtonian. They are dependent on Shear Rate and the
spindle geometry conditions. The specifications of the viscometer spindle and chamber geometry will
affect the viscosity readings. If one reading is taken at 2.5 rpm, and a second at 50 rpm, the two
viscosity values produced will be different because the readings were made at different shear rates.
The faster the spindle speed, the higher the shear rate.

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-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.

Brookfield Engineering Laboratories, Inc. Page 29 Manual No. M/92-021-O604

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 code
directs the DV-I+ to calculate viscosity for the spindle that is being used. The spindle multiplyer
constant (SMC) is used to calculate full scale viscosity range for any spindle/speed combination (refer
to Appendix E). Spindle codes are listed in Table D-1.

SPINDLE CODE SMC

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

SPINDLE CODE SMC

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
SC4-27/27D 27 25
SC4-28 28 50
SC4-29 29 100
SC4-31 31 32
SC4-34 34 64
SC4-37 37 25
CPE40 40 0.327
CPE41 41 1.228
CPE42 42 0.64
CPE51 51 5.178
CPE52 52 9.922
V-71 71 2.62
V-72 72 11.10
V-73 73 53.50

Table D-1

Note: Spindle codes 66, 67 and 74 are not in the firmware for the DV-I+ Spindle Table D-1. Manual

calculations are required to convert torque readings to shear stress and viscosity values.

Brookfield Engineering Laboratories, Inc. Page 30 Manual No. M/92-021-O604

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

VISCOMETER TORQUE CONSTANT MODEL CODE

MODEL TK ON DV-I+ SCREEN

LVDV-I+ 0.09373 LV

2.5xLVDV-I+ 0.2343 4L
5xLVDV-I+ 0.4686 5L
1/4 RVDV-I+ 0.25 1R
1/2 RVDV-I+ 0.5 2R
RVDV-I+ 1 RV
HADV-I+ 2 HA
2xHADV-I+ 4 3A

2.5xHADV-I+ 5 4A
HBDV-I+ 8 HB
2xHBDV-I+ 16 3B

2.5xHBDV-I+ 20 4B
5xHBDV-I+ 40 5B

Table D-2

Brookfield Engineering Laboratories, Inc. Page 31 Manual No. M/92-021-O604

Appendix E - Calibration Procedures

The accuracy of the DV -I+ is verified using viscosity standard fluids which are available from Brookfield
Engineering Laboratories or your local Brookfield agent. Viscosity standards are Newtonian, and
therefore, have the same viscosity regardless of spindle speed (or shear rate). Viscosity standards,
calibrated at 25

Container size: For Viscosity Standards < 30,000 cP, use a 600 ml Low Form Griffin

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

°C, are shown in Table E-1 (Silicone Oils) and Table E-2 (Mineral Oils).

Beaker 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.

Conditions: The DV-I

+ should be set according to the operating instructions. The water

bath must be stabilized at test temperature. Viscometers with the letters “LV”
or “RV” in the model designation must have the guard leg attached (see page
34 for more information on the guard leg).

Normal 25°C Standard Fluids High Temperature Standard Fluids

Viscosity (cP) Viscosity (cP) Three Viscosity/Temperatures**

5 5,000 HT-30,000
10 12,500 HT-60,000
50 30,000 HT-100,000

100 60,000

°

500 100,000 **25

C, 93.3°C, 149°C

1,000 Refer to Brookfield catalog for

more information.

Table E-1

MINERAL OIL VISCOSITY STANDARD FLUIDS

BEL Part No. Viscosity (cP) 25°C

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

Table E-2

Brookfield Engineering Laboratories, Inc. Page 32 Manual No. M/92-021-O604

Brookfield Viscosity Standard Fluid - General Information

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

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

Brookfield Engineering Laboratories does not recertify V iscosity Standard Fluids. We will issue dupli­cate copies of the Certificate of Calibration for any fluid within two years of the purchase date.

Brookfield Viscosity Standard Fluids are reusable provided they are not contaminated. Normal prac­tice for usage in a 600 ml beaker is to return the material from the beaker back into the bottle. When
using smaller volumes in accessories such as Small Sample Adapter, UL Adapter, Thermosel or Spiral
Adapter, the fluid is normally discarded.

Calibration Procedure for LV(#1-4) and RV,HA,HB(#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 is

used).

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

4) The viscosity standard fluid, together with the spindle and guardleg, should be immersed in the
bath for a minimum of 1 hour, stirring the fluid periodically, prior to taking measurements. The
spindle 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 soak
time if required to come to test temperature.

6) If the fluid is at test temperature, measure the viscosity and record the viscometer reading; 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 the
combined accuracies of the viscometer and the standard (as discussed in the section entitled,
Interpretation of Calibration Test Results).

Brookfield Engineering Laboratories, Inc. Page 33 Manual No. M/92-021-O604

Calibration Procedure for a Small Sample Adapter

When a Small Sample Adapter is used, the water jacket is connected to the water bath and the water is
stabilized at the proper temperature:

1) Put the proper amount of viscosity standard fluid into the sample chamber. The amount
varies with each spindle/chamber combination. (Refer to the Small Sample Adapter
instruction 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 hanging
spindle (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 test
temperature.

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 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 this
section, entitled Calibration Procedure for LV (#1-4) and RV,HA,HB (#1-7) Brookfield
spindles.

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 test
temperature. DO NOT USE THE THERMOSEL T O CONTROL T O TEMPERA TURES WITHIN
15° 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. The
amount varies with the spindle used. (Refer to the Thermosel instruction manual).

2) Place the sample chamber into the Thermo Container.

3) Put the spindle into the test fluid and attach the extension link, coupling nut and free hanging
spindle (or directly attach the solid shaft spindle) to the DV-I+.

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

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.

Brookfield Engineering Laboratories, Inc. Page 34 Manual No. M/92-021-O604

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 UL
Adapter 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, connect
the inlet/outlets to the bath external circulating pump.

5) Allow sufficient time for the viscosity standard, sample chamber and spindle to reach test
temperature.

6) 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 DIN Adapter

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

1) Put the proper amount of viscosity standard fluid into the UL Tube. (Refer to the UL
Adapter instruction manual).

2) Attach the spindle (with extension link and coupling nut) onto the 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, connect
the inlet/outlets to the bath external circulating pump.

5) Allow sufficient time for the viscosity standard, sample chamber and spindle to reach test
temperature.

6) 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.

Brookfield Engineering Laboratories, Inc. Page 35 Manual No. M/92-021-O604

Calibration Procedure for a Helipath Stand and T-Bar Spindles

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

the procedures for LV(#1-4) and RV,HA,HB (#1-7) Brookfield spindles outlined above.

Calibration Procedure for Spiral Adapter

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

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

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

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

NOTE: The spindle must rotate at least five (5) times or for one minute, whichever is

greater before 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 of
the cone to the plate.

2) Refer to Appendix A, Table 1, and determine the correct sample volume required for the
spindle 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 use
a 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 standards
suitable for use with Cone/Plate Viscometers. See Table E-2. It is best to use a viscosity
standard fluid that will be close to the maximum viscosity for a given cone spindle/speed
combination.

Example: LVDV-I+ Viscometer, Cone CP-42, Fluid 10

Having 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 should
be 97% torque and 9.7 cP viscosity ± 0.197 (closer to ±0.2) cP. The accuracy is a
combination of Viscometer and fluid tolerance (refer to Interpretation of Calibration
Test Results).

Brookfield Engineering Laboratories, Inc. Page 36 Manual No. M/92-021-O604

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

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

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

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

Interpretation of Calibration Test Results:

When verifying the calibration of the DV-I+, the instrument and viscosity standard fluid error
must 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 at

2 RPM; Brookfield Standard Fluid 12,500 with a viscosity of 12,257 cP at 25

1) Calculate full scale viscosity range using the equation:

°C:

Full Scale Viscosity Range [cP] = TK * SMC

Where:

TK = 1.0 from Table D2
SMC = 10 from Table D1

Full Scale Viscosity Range = 50,000 cP

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

The Brookfield Guardleg

1 * 10 * 10,000

2

10,000

*

RPM

The guard leg was originally designed to protect the spindle during use. The first applications of the
Brookfield V iscometer included hand held operation while measuring fluids in a 55 gallon drum. It is
clear that under those conditions the potential for damage to the spindle was great. Original construc­tion included a sleeve that protected the spindle from side impact. Early R V guard legs attached to the
dial housing and LV guard legs attached to the bottom of the pivot cup with a twist and lock mecha­nism.

Brookfield Engineering Laboratories, Inc. Page 37 Manual No. M/92-021-O604

The current guard leg is a band of metal in the shape of the letter U with a bracket at the top that
attaches to the pivot cup of a Brookfield Viscometer/Rheometer. Because it must attach to the pivot
cup, the guard leg cannot be used with a Cone/Plate instrument. A guard leg is supplied with all L V and
RV series instruments, but not with the HA or HB series, or Cone/Plate version. It’s shape is designed
to accommodate the spindles of the appropriate spindle set;
therefore, the RV guard leg is wider than the LV due to the
large diameter of the optional RV #1 spindle.

The calibration of the Brookfield V iscometer/Rheometer is
determined using a 600 ml Low Form Griffin Beaker. The
calibration of LV and RV series instruments includes the
guard leg. The beaker wall (for HA/HB instruments) or the
guard leg (for L V/RV instruments) define 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 (calcu­lated by the DV -I+) are used to convert the instrument torque
(expressed as the %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 spindle calculations cannot
be used to accurately calculate an absolute viscosity . Chang-

LV Guardleg RV Guardleg

ing the boundary conditions does not change the viscosity
of the fluid, but it does change how the instrument torque is converted to centipoise. W ithout changing
the spindle code 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
L V 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 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 difficult for some cus­tomers to follow . The guard leg is one more item to clean. In some applications the 500 ml of test fluid
required to immerse the spindles in a 600 ml beaker is not available. In practice, a smaller vessel may
be used and the guard leg is removed. The Brookfield V iscometer/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 specific
conditions. Brookfield has outlined a method for recalibrating a Brookfield Viscometer/Rheometer to
any 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 to
day value. This repeatable value can be obtained without any special effort for any measurement
circumstance. But, it should be known that this type of torque reading will not convert into a correct
centipoise value when using a Brookfield factor if the boundary conditions are not those specified by
Brookfield.

The guard leg is a part of the calibration check of the Brookfield L V and RV series V iscometer/Rheom­eter . Our customers should be aware of its existence, its purpose and the effect that it may have on data.
With this knowledge, the viscometer user may make modifications to the recommended method of
operation to suit their needs.

Brookfield Engineering Laboratories, Inc. Page 38 Manual No. M/92-021-O604

Appendix F - Special Speed Sets

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

RPM SPEED SET (RPM)

Step SS200 SS150 SS100 SS50 SS25 SSINT

1 0.0 0.0 0.0 0.0 0.0 0.0
2 1.0 0.8 0.5 0.2 0.1 0.3
3 1.4 1.1 0.7 0.3 0.2 0.5
4 1.8 1.4 0.9 0.4 0.3 0.6
5 2.0 1.5 1.0 0.5 0.4 1.0
6 4.0 3.0 2.0 1.0 0.5 1.5
7 6.0 4.0 3.0 1.5 0.7 2.0
8 8.0 6.0 4.0 2.0 1.0 2.5
9 10 7.5 5.0 2.5 1.2 3.0

10 20 15 10 5.0 2.5 4.0

11 40 30 20 10 5.0 5.0
12 60 40 30 15 7.5 6.0
13 80 60 40 20 10 10
14 100 75 50 25 12 12
15 120 90 60 30 15 20
16 140 105 70 35 17 30
17 160 120 80 40 20 50
18 180 135 90 45 22 60
19 200 150 100 50 25 100

Table F-1

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

Brookfield Engineering Laboratories, Inc. Page 39 Manual No. M/92-021-O604

Appendix G - Communications

DV-I+ with Temperature Option Analog Outputs

1

No Connection

2

No Connection

3

Connected

internally. Do

{

not use.

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 volts
correpsonds to +300°C with a resolution of 1 millivolt (0.1°C).

4

5

6

Analog Ground (%Torque & Temperature)

7

Analog % Torque (

8

Analog Temperature - optional (

9

No Connection

see Note 1

)

see Note 2

)

Figure G-1

Analog Output:

The analog outputs for % torque is accessed from the 9-pin connector located on the rear panel of
the 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 Output
Green Wire: % Torque Ground

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

Brookfield Engineering Laboratories, Inc. Page 40 Manual No. M/92-021-O604

Appendix H - Model S Laboratory Stand with Parts Identification*

VS-35Y

MODEL S

CLAMP ASSEMBLY

6

1

8

9

10

BROOKFIELD
LABORATORY
VISCOMETER

7

11

2

5

4

3

ITEM PART #

VS-34

1

VS-38

2

VS-2

3

VS-3

4

50S311824S06B

5

502020032S34Z

6

VS-35

7

VS-40Y

8

VS-41Y

9

VS-29

10

VS-29W

11 1VS-28 TENSION SCREW

14” UPRIGHT ROD
18” UPRIGHT ROD
BASE
LEVELING SCREW
SCREW, 5/16-18 X 3/4 LG. SLOTTED PAN HD.
LOCKWASHER, EXTERNAL TOOTH, 5/16 X 5/8 X 1/32
CLAMP
GEAR SCREW ASSEMBLY
CLAMP SCREW ASSEMBLY
TENSION INSERT
BELLEVILLE SPRING WASHER

DESCRIPTION

QTY.

1

OPTIONAL

1
2
1
1
1
1
1
1
2

Figure H-1

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

Brookfield Engineering Laboratories, Inc. Page 41 Manual No. M/92-021-O604

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 carton
1 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 of

the 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 the
pin located in the base.

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

Viscometer Mounting

Insert the V iscometer 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 clamp
knob (clockwise). Use the leveling screws to “fine” adjust the viscometer level. Note: If the

Digital Viscometer cannot be leveled, check to insure that the rod is installed with the gear
rack facing forward.

Note: If the clamp is taken off the upright rod, the tension insert (Part No. VS-29) must be

properly 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 vertical
position parallel to the upright rod. If the slot is not in the correct position, the clamp
will not slide down over the upright rod. Use a small screwdriver or pencil to move
it into the correct position. The VS-29W Belleville spring washers must face each
other as illustrated. Adjust the VS-28 tension screw so that the clamp assembly is not
loose on the upright rod.

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

Center the V iscometer relative to the stand base and retighten the lar ge slotted pan head screw as
required. Referring to the Viscometer bubble level, adjust the leveling screws until the instru­ment is level.

Brookfield Engineering Laboratories, Inc. Page 42 Manual No. M/92-021-O604

Appendix I - DVE-50A Probe Clip

Tp

Probe Clip DVE-50A is supplied with the DV -I+ Optional T emperature Probe. It is used to attach
the R TD temperature probe to the LV/RV Guard Leg 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/R V guard leg. When inserting the RTD probe into the Probe Clip, the
upper part of the Clip is compressed by squeezing the points shown in Figure I-1.

RTD Probe

Hole

Figure I-1

Figure I-2 shows the Probe Clip (with RTD temperature probe installed) mounted on the guard
leg.

Squeeze Here when

installing RTD

Temperature Probe

Figure I-3 shows the Probe Clip mounted in a 600 mL low form Griffin beaker. This mounting
may 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 the

viscosity measurement.

Guard Leg

DVE-50A

Probe Clip

RTD Temperature

Probe

RTD Temperature

Probe

500

ml

600 ml

USA

No. 14000

400

300

200

100

DVE-50A

Probe Clip

600 mL Low Form

Griffin Beaker

Figure I-2 Figure I-3

Brookfield Engineering Laboratories, Inc. Page 43 Manual No. M/92-021-O604

Appendix J - Fault Diagnosis and Troubleshooting

Spindle Does Not Rotate

❏ Make sure the viscometer is plugged in.
❏ Check the voltage rating on your viscometer (115V, 220V): it must match wall voltage.
❏ Make sure the power switch is in the ON position.
❏ Verify rpm: make sure rotational speed (rpm) has been correctly selected.

Spindle Wobbles When Rotating or Looks Bent

❏ Make sure the spindle is tightened securely to the viscometer coupling.
❏ 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 spindle
rotating 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 section
to 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 % 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 how
to return your viscometer .

Brookfield Engineering Laboratories, Inc. Page 44 Manual No. M/92-021-O604

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

❏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 for
details on how to return your viscometer.

Brookfield Engineering Laboratories, Inc. Page 45 Manual No. M/92-021-O604

Appendix K - Warranty Repair and Service

Warranty

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

For repair or service in the United States return to:

Brookfield Engineering Laboratories, Inc.

11 Commerce Boulevard

Middleboro, MA 02346 U.S.A.

Telephone: [phone] FAX: [phone]

www.brookfieldengineering.com

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

For repair or service in the United Kingdom return to:

Brookfield Viscometers Limited

1 Whitehall Estate

Flex Meadow

Pinnacles West

Harlow, Essex CM19 5TJ, United Kingdom

Telephone: [phone] FAX: [phone]

www.brookfield.co.uk

For repair or service in Germany return to:

Brookfield Engineering Laboratories Vertriebs GmbH

Hauptstrasse 18

D-73547 Lorch, Germany

Telephone: [phone] FAX: [phone]

www.brookfield-gmbh.de

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

Brookfield Engineering Laboratories, Inc. Page 46 Manual No. M/92-021-O604

Packaging Instructions to Return a Viscometer for Repair or Calibration

a

a

a

a

a

a

a

a

a

a

aa

a

a

a

a

a

a

a

a

❏ Remove and return all spindles (properly packed

for shipping).

❏ Clean excess testing material off the instrument.
❏ Include MSDS sheets for all materials tested with

F

I

G

U
R
E

L

1

F

Foam Insert

I

or Tissue Paper

G

U
R
E

L

2

CONE/
PLATE

this instrument.

❏ Support pointer shaft with white, nylon shipping

cap, as shown in Figure L1, or elastic band from
coupling to mounting rod of viscometer.

❏ Pack the instrument in its original case. If the

case is not available, take care to wrap the
instrument with enough material to support it.
Avoid using foam peanuts or shredded paper.
Special shipping boxes are available from
Brookfield for service situations.

❏ DO NOT send the Laboratory Stand unless there

is a problem with the upright rod, clamp or base.
If there is a problem with the stand, remove the
upright rod from the base and individually wrap
each item to avoid contact with the instrument.
Do not put Lab Stand in Viscometer carrying
case.

❏ Fill out the Viscometer Information Sheet (next

page) with as much information as possible to
help expedite your service. If you do not have
this form, please include a memo indicating the
type of problem you are experiencing or the
service you need performed. Please also include
a purchase order number for us to bill against.

❏ Package the instrument and related items in a

strong box for shipping. Mark the outside of the
box with handling instructions.

Example: "Handle with Care" or

"Fragile - Delicate Instrument"

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

Brookfield Engineering Laboratories, Inc. Page 47 Manual No. M/92-021-O604

When returning your instrument for repair, please use this VISCOMETER INFORMA­TION SHEET.

Providing us with the following information will help us to service your equipment more quickly and
efficiently. 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 your
equipment continues to provide the same accuracy you have come to expect from Brookfield products.

VISCOMETER INFORMATION

1

Date:_______________________

Serial Number: _______________________ Model: _____________________

2

COMPANY INFORMATION

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)

❏

3

SERVICE INFORMATION

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

_________________________________________________________________________

_________________________________________________________________________
Did you contacting Brookfield before returning this instrument? Y
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
Other Comments: _________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

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.

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Brookfield Engineering Laboratories, Inc. Page 48 Manual No. M/92-021-O604

Brookfield Engineering Laboratories, Inc. Page 49 Manual No. M/92-021-O604

VISCOSITY TEST REPORT

TEST INFORMATION:

DATE:

BY:

FOR:

Appendix L - Viscosity Test Report

SAMPLE MODEL SPINDLE RPM

CONCLUSIONS:

DIAL READING

% TORQUE cP RATE °C

FACTOR

VISCOSITY SHEAR TEMP

TIME NOTES

BROOKFIELD ENGINEERING LABORATORIES, INC. • 11 Commerce Boulevard • Middleboro, MA 02346 • TEL: [phone] or 800-628-8139 (USA) FAX: [phone] • www.brookfieldengineering.com