Brookfield Thermosel User Manual

BROOKFIELDTHERMOSELACCESSORY

Operating Instructions

Manual No. M94-204-I0612

SPECIALISTS IN THE

MEASUREMENT AND

CONTROLOFVISCOSITY

with o ces in : Boston • Chicago • London • Stuttgart • Guangzhou

BROOKFIELD ENGINEERING LABORATORIES, INC.

11 Commerce Boulevard,		M iddleboro, M A 02346	USA
TEL [phone]	or 800-628-8139 (USA e xcluding		MA)
FAX [phone]	INTERNET	http://www.brookŒeldengineering.com

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	TABLE OF CONTENTS
I. INTRODUCTION...........................................................................................		5
I.1	Utilities.......................................................................................................................................	5
I.2	Specifications.............................................................................................................................	5
I.3 Safety Symbols and Precautions.................................................................................................		6
I.4	Operation....................................................................................................................................	7
I.5	General.....................................................................................................................................	10
I.6	Viscosity Measurements...........................................................................................................	10
I.7	Clean-Up..................................................................................................................................	13
Appendix A - Viscosity Ranges/Spindle Factors.......................................................................		14
Appendix B - High Temperature Calibration Fluids.................................................................		19
Appendix C - Disposable Sample Chambers............................................................................		20
Appendix D - Solid Shaft Spindle Options...............................................................................		22
Appendix E - Conversion Table: Centigrade and Fahrenheit....................................................		23
Appendix F - Online Help and Additional Resources...............................................................		24
Appendix G - Warranty.............................................................................................................		25

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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 from 40°C (104°F) to 300°C (572°F). The designed viscosity range is from 3 cP to 80,000,000 cP depending upon the viscometer­ and SC4 spindle used.

Please note that all references made herein to digital viscometers would also apply to DV-III+

Rheometers and DV-III Ultra Rheometers.

I.1

Utilities

Input Voltage:

115 VAC or 230 VAC

Input Frequency:

50/60 Hz

Current Rating:

15 Amps

Main supply voltage fluctuations are not to exceed ± 10% of the nominal supply voltage.

I.2

Specifications

Operating Environment:

0°C to 40°C temperature range (32°F to 104°F)

Relative Humidity:

20% - 80%: non-condensing atmosphere

CE Certification:

This product conforms to the general safety requirements for

electrical equipment, for measurement control and laboratory use.

This product conforms to international standards which specify

minimum requirements for immunity and emissions regarding

electromagnetic compatibility (EMC) for electrical equipment intended for professional, industrial, process and educational use.

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I.3SafetySymbols andPrecautions

Safety Symbols
(Caution hot surface symbol)	Caution some surfaces may be hot.
(Caution symbol)	Refertothemanualforspecificwarningorcaution
	information to avoid personal injury or damage to
	the instrument.
Precautions
(Caution Symbol)	Ifthisinstrumentisusedinamannernotspecified
	by the manufacturer, the protection provided by
	the instrument may be impaired.
(Caution symbol)	Thisinstrumentisnotintendedforuseinapotentially
	hazardous environment.
(Caution symbol)	In case of emergency, turn off all of the system
	componentsandthendisconnectallelectricalcords
	from the wall outlet.
(Caution symbol)	The user should ensure that the substances placed
	under test do not release poisonous, toxic or
	flammable gases at the temperatures which they
	are subjected to during the testing.

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I.4Operation

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 groundedA.C. electrical service, as required. Acooling water supply and drain arrangement­ is also recommended for cooling the thermo-container with optional cooling plug assembly.

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 lab stand.) Attach the vis­cometer to the stand by inserting it into the clamp; level the viscometer and position it centered between the stand legs. Raise the viscometer on the lab stand upright rod so that there will be sufficient room to attach the alignment bracket. Check that the power switch is OFF and plug the viscometer power cord into the appropriate electrical service.

Alignment Bracket

Attach the alignment bracket to the rear of the viscometer pivot cup, securing it tight with the knurled screw. (Refer to Figure I-2).

Thermo-Container, Sample Chamber, Safety Guard

Using the three (3) leveling screws in the thermo-container base, to level the base.

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

Set the controller on a level surface adjacent to the thermo-container. Insert the male plug (threeprong) from the thermo-container braided cord into the socket on the back of the controller (turn and lock connection). Insert the four-inch stainless steel probe (Resistance Thermometer) into 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 removal procedure should not be followed if the thermocontainer is at a temperature above 100°F (37°C). Cool the thermo-container first.

If the probe is not inserted in the thermo-container and the controller is turned on, the thermo-container will cease to heat and the controller will give an audible signal!

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.

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Position the thermo-container and base between the viscometer stand legs and adjust the three (3) knurled screws until the bubble is centered.

Lowertheviscometeruntilthetipsofthealignmentbracket(seeFigureI-1)just touch the horizontal surface­ of the locating ring, making contact directly behind the vertical curve. Raise the vis­cometer, positioning the tips of the alignment bracket about 1/16 inch above the horizontal surface behind the locating ring. An etched line on the back of the locating ring is the 1/16 inch reference point.

ALIGNMENT BRACKET

HT-69Y

SPINDLE

LOCATING RING

Figure I-1

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 (see Appendix B).

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 spindle that requires an extension link and coupling nut, attach one end of the link to the spindle and the other to the coupling nut. Carefully lower the spindle by the coupling nut and link into the sample chamber. While pushing up gently on the pivot screw that protrudes from the bottom of the viscometer, thread the coupling nut onto the viscometer. Note that the spindle has a left-hand thread.

•If using a solid shaft (SC4-**BS) spindle, carefully lower the spindle into the sample chamber.

While pushing up gently on the spindle coupling nut that protrudes from the bottom of the viscometer, thread the spindle onto the viscometer. Note that the spindles have a left-hand thread.

Place the insulating cap over the sample chamber inlet.

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