Brookfield Thermosel DV-II+ User manual

Brookfield Engineering Laboratories, Inc. Page 1 Manual No. M/94-204-D1101
BROOKFIELD THERMOSEL ACCESSORY
Operating Instructions
Manual No. M/94-204-D1101
SPECIALISTS IN THE
MEASUREMENT AND
CONTROL OF VISCOSITY
T EL 800-628-8139 or 508-946-6200 F AX 508-946-6262
www.brookfieldengineering.com
BROOKFIELD ENGINEERING LABORATORIES, INC.
11 Commerce Boulevard, Middleboro, MA 02346-1031 USA

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Brookfield Engineering Laboratories, Inc. Page 2 Manual No. M/94-204-D1101
TABLE OF CONTENTS
I. INTRODUCTION........................................................................................................3
I.1 Operation.............................................................................................................3
I.2 General................................................................................................................6
I.3 Viscosity Measurements .....................................................................................6
I.4 Clean-Up .............................................................................................................9
APPENDIXA — VISCOSITY RANGES / SPINDLE FACTORS............................10
Thermosel Viscosity Range Data ...............................................10
Thermosel Spindle Factors.........................................................12
APPENDIX B — High Temperature Calibration Fluids .......................................... 13
APPENDIX C — Disposable Sample Chambers ...................................................14
APPENDIX D — Solid Shaft Spindle Option..........................................................15
APPENDIX E — Conversion Table: Centigrade °/ Fahrenheit°........................16
APPENDIX F — Warranty .....................................................................................17

Brookfield Engineering Laboratories, Inc. Page 3 Manual No. M/94-204-D1101
I. INTRODUCTION
The Brookfield Thermosel System consists of a Brookfield Viscometer, or Rheometer, with related
accessories to accurately measure the viscosity of liquids at elevated temperatures. Viscosity
measurements are obtained using coaxial cylinder geometry. Temperature is controlled by a solid
state, triac output, Proportioning Controller which maintains the spindle, chamber, and sample
material at the desired temperature.
The system is designed for measuring liquid viscosities over a temperature range of up to 300°C
(572°F). Thelowlimitoftemperaturecontrolis40°C(104°F). Thedesignedviscosityrangeisfrom
5 cP to 8,000,000 cP depending upon the viscometer and SC4 spindle utilized.
Please note that all references made herein to digital viscometers would also apply to DV-III+
Rheometers.
I.1 Operation
Viscometer and Stand
The instrumentation should be placed on a firm level surface near a 15 amp, 115 or 230 volt, 50 or
60 Hz electrical service, as required. A cooling water supply and drain arrangement is also
recommended for cooling the thermo-container.
Set up the viscometer stand by connecting the upright rod with clamp attached into the base. Screw
the leveling screws into position on the base. (Refer to the assembly instruction supplied with your
labstand.) Attachtheviscometertothestandbyinsertingitintotheclamp;leveltheviscometerand
positionitcenteredbetweenthestandlegs. Raisetheviscometertothehighestpositiononthestand.
Check that the power switch is OFF and plug the viscometer power cord into the appropriate
electrical service.
Alignment Bracket
With the viscometer raised to the highest position on the stand, attach the alignment bracket to the
rear of the viscometer pivot cup, securing it tight with the knurled screw. (Refer to Figure 1)
Thermo-Container, Sample Chamber, Safety Guard
Using the three (3) leveling screws in the thermo-container base, position the base level.
Check that the perforated safety guard is flush onto the base of the thermo-container.
Using the extracting tool, insert the chamber into the thermo-container. Rotate the chamber until it
drops and locks in place prohibiting further rotation.
Controller and Probe
Setthecontrolleronalevelsurfaceadjacenttotherightofthethermo-container. Insertthemaleplug
(three-prong) from the thermo-container braided cord into the socket on the back of the controller
(turnandlockconnection). Insertthefour-inchstainlesssteelprobe(ResistanceThermometer) into

Brookfield Engineering Laboratories, Inc. Page 4 Manual No. M/94-204-D1101
the hole in the thermo-container located directly above the braided cord. Plug the other end of the
probe into the connector located on the back of the controller. To remove the probe, depress the
spring clip and carefully slide probe out. This procedure should not be followed if the thermo-
container is at a temperature above 100°F (37°C). Cool the thermo-container first.
IMPORTANT NOTE: If the probe is not inserted in the thermo-container and the
controller is turned on, the thermo-container will overheat
and be destroyed!
Set the controller power switch to the OFF position.
Plug the controller power cord into a 115V, 50/60 Hz or 230 V, 50/60 Hz grounded A.C. power
supply, as required.
System Alignment & Spindle Insertion
Looking down on the viscometer, level the stand base by adjusting the leveling screws until the
bubble is centered.
Position the thermo-container and base between the viscometer stand legs and adjust the three (3)
knurled screws until the bubble is centered.
Lower the viscometer until the tips of the alignment bracket just touch the horizontal surface of the
locating ring, making contact directly behind the vertical curve. Raise the viscometer, positioning
thetipsofthealignmentbracketabout1/16inchabovethehorizontalsurfacebehindthelocatingring.
An etched line on the back of the locating ring is the 1/16 inch reference point.
NOTE: Do not forcibly displace the alignment bracket!
Thermosels and Viscometers are factory-aligned prior to shipment. If viscosity measurements are
suspect, first check system calibration using suitable viscosity standard fluids. Add the appropriate
volume to the sample container (see Appendix A, Range Tables, for volume requirement; see
viscometer operating manual for calibration procedures).
• If using a solid shaft (SC4-**BS) spindle, carefully lower the spindle into the sample chamber,
andthreadthespindleontotheviscometer. Notethatthespindleshavealeft-handthread. Make
suretopushupgentlyon thespindlecouplingnutthatprotrudesfrom thebottomtheviscometer.
• If using a spindle that requires an extension link and coupling, attach one end of the link to the
spindle and the other to the coupling. Carefully lower the spindle by the coupling and link into
the sample chamber. Thread the coupling onto the viscometer. Notethat thespindlehas aleft-
hand thread. Make sure to push up gently on the pivot screw that protrudes from the bottom of
the viscometer.
Connect the coupling link to the spindle and to the coupling nut.
Place the insulating cap over the sample chamber inlet.

Brookfield Engineering Laboratories, Inc. Page 5 Manual No. M/94-204-D1101
BROOKFIELD THERMOSEL WITH DV-II+ VISCOMETER
Figure 1
SPINDLE EXTENSION
SXV-24
LOCATING RING
THERMO CONTAINER
DUAL PROBE
HT-60DP (
110 VOLT )
HT-60 220 DP (
220 VOLT )
ALIGNMENT BRACKET
HT-69Y
VISCOMETER
COUPLING NUT
COUPLING NUT
S-23
SPINDLE
DUAL
TEMPERATURE
PROBE
INLETS
BUBBLE LEVEL
LEVELING SCREWS
VS-3
TEMPERATURE CONTROLLER
VIEW "A-A"
EXTRACTING TOOL
HT-59
BASE
VS-1
or VS-2
BROOKFIELD VISCOMETER BUBBLE LEVEL
COOLING PLUG ASS'Y
HT-26Y
SAMPLE CHAMBER
HT-2
DISPOSABLE SAMPLE CHAMBER
HT-2D
SAMPLE CHAMBER HOLDER
HT-54
THERMO CONTAINER
TO CONTROLLER
CORD
EXTRACTOR PLIERS (DISPOSABLE CHAMBERS)
HT-116
INSULATING CAP
HT-67Y
TEMPERATURE PROBES (INSERTED IN THERMO CONTAINER)
DVP-94Y
(REAR VIEW)

Brookfield Engineering Laboratories, Inc. Page 6 Manual No. M/94-204-D1101
I.2 General
The operator should become familiar with the alignment procedure so that he can safely align and
operate the system at elevated temperatures.
The system is designed to operate in the temperature range from 40°C (104°F) to a maximum of
300°C(572°F). Controloftestsampletemperatureispossibleinthisrangewithaccuracyasfollows:
Temperature Range Temperature Accuracy
-100°C to +150°C±1.0°C
+150°C to +300°C±2.0°C
The lower limit of control is approximately 40°C (104°F).
NOTE:The upper limit of precise control is 300
° C. This is determined not by the
controller-heatelementcapabilities,butbydesignofthespindle,samplechamber,
thermo-container, and the proximity of the viscometer to the thermo-container.
USE OF THE SYSTEM ABOVE 300 ° C COULD RESULT IN DAMAGE TO
THE THERMO-CONTAINER AND TO THE VISCOMETER.
Thecontrollerwill bringthethermo-containertoelevatedsetpointtemperaturein approximately30
minutes. However, unassisted, the reverse situation is quite time consuming. Approximately four
hours is required for the thermo-container to cool from 260°C (500°F) to 37°C (100°F). Using the
cooling plug (HT-26Y) this temperature reduction can be obtained in about 20 minutes. (Refer to
Page7forspecificinstructions). Familiarizationwiththetemperaturecontrollerinstructionsshould
be made at this time.
Enclosed in the appendix is the viscosity range, spindle factors, and test volume data. This
information is to be used when obtaining viscosity measurements.
I.3 Viscosity Measurements
Samples That Are Liquid At Ambient Temperature
With the instrumentation assembled and familiarization completed, the following steps are recom-
mended for taking viscosity measurements of samples which are liquid at ambient temperature:
1. Remove the insulating cap; unthread the coupling nut and remove the spindle.
2. Raise the viscometer to the highest level on the stand.
3. Remove the sample chamber (HT-2 or HT-2D) using the extracting tool (HT-59 or HT-116
respectively) and place it in the sample chamber holder (HT-54).

Brookfield Engineering Laboratories, Inc. Page 7 Manual No. M/94-204-D1101
4. Usingasyringe,graduatedcylinder,orothersuitablemeasuringdevice,pourintothesample
chamber the volume of liquid sample specified on the range table in Appendix A.
5. Usingtheextracting tool, put the loaded chamber back intothethermo-containerbyrotating
the chamber until it drops and locks in place.
6. Lower the viscometer and align the thermo-container.
7. Lower the spindle into the chamber and connect the link coupling nut (S-23) to viscometer
couplingnutbyliftingtheviscometershaftupslightlywhilescrewingontheS-23. (Noteleft-
hand thread). Check that the liquid level is 1/8 inch on the spindle shaft - above the conical
surface. Do not overfill.
8. Replace the insulating cap.
9. Turn on the controller and adjust the set point on the controller to the desired set point
temperature at which viscosity measurements are to be made.
NOTE: The desired set point will be denoted by a steady display on the controller,
along with the steady flashing of the heater “ON” light.
One option for sample materials that are not thixotropic or pseudoplastic
is to turn ON the viscometer and leave it running during the equilibrium
period. Therotatingspindleprovidesagitationwhichreducestemperature
equilibrium time and temperature gradients within the test sample.
10. After the thermo-container, spindle, chamber, and test sample have reached temperature
equilibrium, viscosity readings at different speeds may be obtained.
Samples That Are Not Liquid At Room Temperature
Thereareseveralalternativeproceduralapproachestowardtesting samples which are solid or semi-
solid at ambient (room) temperature. The main concerns of the operator are: First - safety; Second
-tokeeptestmaterialINthe sample chamber andOUTOFthethermo-containerwell. Thethermo-
container can be preheated without the sample chamber and test material if desired.
The following steps are recommended for taking viscosity measurements of test samples which are
liquid only at elevated temperatures.
1. The instrumentation should be assembled without the insertion of the sample chamber,
spindle, and insulator cap.
2. Set the controller to the desired temperature.
3. Weigh into the sample chamber the amount of test sample which in the liquid state will be
equivalent to the test volume required.
4. Place the sample chamber into the thermo-container and proceed, following the steps
outlined for liquid samples at ambient temperature, starting on Page 6.

Brookfield Engineering Laboratories, Inc. Page 8 Manual No. M/94-204-D1101
TEMPERATURE (°F)
100
200
300 400
500
2468
10 12 14 16 18
THERMOSEL COOLING
TIME (Minutes)
Temperature (°F) vs. Time (Min.)
Cooling Plug Cooling Medium Temperature Flow Rate Controller Thermosel
- - - - - -
Circulating Tap Water 51°F 1 gal/min Model 61 500°F (Max)
Thermo-Container Assisted Cooling
Withthesamplechamberremoved,thethermo-containercanbecooledbyinsertingthecoolingplug
into the sample chamber well and circulating a cooling medium (tap water) through it.
NOTE: Water must be circulating through the cooling plug at all times prior to and during the
cooling period.

Brookfield Engineering Laboratories, Inc. Page 9 Manual No. M/94-204-D1101
I.4 Clean-Up
Cleaning
Using the extracting tool, the chamber is lifted out of the thermo-container and the sample material
poured out. The spindle and chamber are made of stainless steel which can be cleaned with most
commercialsolvents. TheyshouldnotcomeincontactwithSulfuricAcid;HydrofluoricAcid;Ferric
Chloride or Hydrochloric Acid solutions. Use mechanical action as required to scrape out the
chamber.
Disposable sample chambers (Part No. HT-2DB) do not require any type of cleaning and may be
discarded after use.