BROOKFIELD SPIRAL ADAPTER Operating Instructions Manual No. M93-270-D0812 SPECIALISTS IN THE MEASUREMENT AND CONTROL OF VISCOSITY BROOKFIELD ENGINEERING LABORATORIES, INC. 11 Commerce Boulevard, Middleboro, MA 02346-1031 USA TEL 800-628-8139 or 508-946-6200 F AX 508-946-6262 www.brookfieldengineering.com Brookfield Engineering Labs., Inc. Page 1 Manual No.
TABLE OF CONTENTS I. Introduction....................................................................................................................................5 II. Components....................................................................................................................................6 III. Specifications for Test Set Up....................................................................................................7 IV. Installation............................................
I. INTRODUCTION When used with any Brookfield Viscometer/Rheometer, the Spiral Adapter can measure fluid viscosity at various 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 Viscometer/Rheometer and is also available as a pdf file on the Brookfield website.
II. COMPONENTS The following components are included in the Spiral Adapter Accessory (part number SAA): Item Part Number Two (2) Spindles of identical design One (1) Chamber One (1) Assembly Clamp One (1) Carrying Case One (1) Cleaning Brush One (1) Operator Manual SA-70 SA-1Y SA-5Y SA-8 SA-4 M93-270 Please check to be sure that you have received all components, and that there is no damage. If any parts are missing, please notify Brookfield Engineering or your local Brookfield agent immediately.
III. SPECIFICATIONS FOR TEST SET UP The Spiral Adapter can be used with any Brookfield Viscometer/Rheometer. Selection of the appropriate Viscometer/Rheometer depends upon the viscosity range of the sample fluid over the shear rates at which it will be tested. There are four basic spring torque series offered by Brookfield as shown in Table 1. The higher the torque range, the higher the viscosity measurement range. The corresponding ranges for viscosity measurement when the spiral spindle is rotating at 1.
IV. INSTALLATION Install the spiral spindle by lifting and holding the pointer shaft of the Viscometer/Rheometer while screwing the spindle onto it. The threads are left-hand so the spindle must be turned to the left. Gently lift the chamber over the spindle up against the pivot cup until it rests over the locating shoulder. While holding the chamber in place, fasten the assembly clamp onto the pivot cup, thereby securing the chamber in place. The thread in this case is right hand.
Note: • For DV-I and Dial Viscometers, use the torque reading and manually convert to a viscosity value using the table in Appendix A. • For DV-II Viscometers, use the spindle 99 entry. Enter the following values: SMC (Spindle Multiplier Constant) = 105 SRC (Shear Rate Constant) = .677 Customers who use the Brookfield Spiral Adapter may need to have their Brookfield Viscometer/ Rheometer serviced before using this accessory device.
V. OPERATION V.1 Theory The Spiral Adapter has an inner, threaded spindle surrounded by a concentric outer cylinder, as shown previously in Figure 1. This combination causes the sample to be continuously pumped up through the gap between the rotating spindle and the outer cylinder. The material reaches a steady state of flow during which viscosity is measured. At its various rotating speeds, the Brookfield Viscometer/Rheometer with the Spiral Adapter provides viscosity data at different shear rates.
30 20 15 10 60 50 40 30 20 10 Tim 5 % Figure 3 V.3 Data Gathering Brookfield offers applications software for comprehensive data gathering with any IBM compatible PC. Brookfield software will capture and display the following data in tabular and/or graphical format when used with the appropriate Brookfield Viscometer.
V.4 Application Example - Solder Paste LOG VISCOSITY (cP) VISCOSITY (cP) Applying solder paste is a printing operation that shears the materials as the paste “rolls” on the stencil surface. Solder paste typically shows pseudoplastic behavior (exponential decrease in viscosity with increasing shear rate) as shown in Figure 4.
APPENDIX A - Spiral Spindle Factors for Torque (% Scale) Measurements Table A-1 applies to Brookfield Viscometer models with series designation LV, RV, HA, and HB. The procedure for converting a torque value (% scale) into a viscosity value (cP) is accomplished by multiplying the appropriate factor shown in Table A-1 by the torque reading on your Brookfield Viscometer. Spindle Speeds (RPM) 0.3 0.5 0.6 1.0 1.5 2.0 2.5 3.0 4.0 5.0 6.0 10.0 12.0 20.0 30.0 50.0 60.0 100.0 Spiral Spindle Factors LV 3,280.
APPENDIX B - Online Help and Additional Resources www.brookfieldengineering.com** The Brookfield website is a good resource for additional and self-help whenever you need it. Our website offers a selection of “how-to” videos, application notes, conversion tables, instructional manuals, material safety data sheets, calibration templates and other technical resources. http://www.youtube.com/user/BrookfieldEng Brookfield has its own YouTube channel.
APPENDIX C - Warranty Repair and Service The Brookfield Spiral Adapter is guaranteed for one year from date of purchase against defects in materials and workmanship. The Spiral Adapter must be returned to Brookfield Engineering Laboratories, Inc. or the Brookfield dealer from whom it was purchased for no charge warranty service. Transportation is at the purchaser’s expense. The Spiral Adapter should be shipped together with all components originally provided with the system.
