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- Page 1 VS1000 VariSifter™ Operation & Set-up Manual Advantech Manufacturing, Inc. a W.S. Tyler Company 8570 Tyler Blvd, Mentor, OH 44060 T. 800-321-6188 • F. 440-974-0921 E Mail: info@wstyler.com• Web Site: www.wstyler.com...
- Page 3 Specifications Thanks to the VariSifter’s™ internal converter, a single model can be used in any of the following power environments: 120V/60Hz 120V/50Hz 240V/50Hz 240V/60Hz Materials of Construction Stainless Steel Test Table Steel Cabinet and Frame Baked Powder Finish Throughout Acrylic Sieve Frames, Spacers, and Top Cone Metal Column Lock Aluminum Fines Collector Holder...
- Page 4 Operating Instructions Installation Place the VariSifter™ on a level surface for operation. Observe the ambient temperature humidity guidelines outlined specifications section. Electrical Connection Plug the power cord into the socket in the rear of the unit and then into the power source. The VariSifter™...
- Page 5 Manual |/O Testing Screen The |/O screen is a troubleshooting module that will be helpful in the event of malfunctions. Advantech/W.S. Tyler telephone or email support can assist with walking through the Manual |/O Testing Screen buttons, if necessary. Machine Status Indicator ...
- Page 6 Timer The maximum test run-time is 59 minutes and 59 seconds. program the test run time, touch the green button below the “TEST TIME” box. Program the minutes and seconds for your test, then touch the enter key. The test time length will display in green under the “TEST TIME” button.
- Page 7 the test chamber. To avoid possible stack upset, unclamp the arms immediately upon removal from the machine. Disassembling the Stack Assembly While steadying the stack with one hand, spread the column locking arms with the other hand by sliding a thumb and forefinger into the openings between the lowest sieve and the column locking.
- Page 8 Performing the Analysis The following steps constitute a typical analysis with the VariSifter™ Sonic Separator: Weighing the Parts Weigh and record the tare weights of the diaphragm, top cone, spacers, sieves, and fines collector. Installing the Fines Collector Install the fines collector in the fines collector holder. Fasten the round metal plate at the bottom of the fines collector to the fines collector holder by sliding the keyhole slot in the fines collector over...
- Page 9 Replacing the Column Lock WARNING: Do not lock column lock arms until you are ready to place the test stack into the test chamber! Uncontrolled release of the arms could cause stack upset and sample loss. Place the column lock onto the sieve stack and press straight down until the locking arms snap onto the fines collector holder.
- Page 10 setting, the more “lift” on particles. Moving the particles more vigorously than necessary DOES NOT increase the speed or precision of the separation. In fact, excessive amplitude settings may increase electrostatic problems, sample loss, and equipment wear. WARNING: Due to the extremely fragile nature of the Precision Electroformed Series sieves, excessive amplitude, especially over extended periods of time can cause immediate or premature sieve failure.
- Page 11 proven to be the most effective method of removing particles plugging woven wire cloth sieve openings. Regular ultrasonic cleaning will help prevent particle buildup in the sieve openings, thus reducing the amount of time each sieve must be exposed to ultrasonic vibrations. Care must be taken in how long the sieves are exposed to the ultrasonic vibrations, as damage can result from overexposure.
- Page 12 Mentor, OH. Advantech/W.S. Tyler does not assume responsibility or accept invoices for unauthorized repairs to its apparatus. Under no circumstances shall Advantech/W.S. Tyler be liable for loss of profits or other damages. Advantech/W.S. Tyler is not responsible for damage to apparatus due to improper installation or operation beyond its rated capacity (intentional or otherwise).
- Page 13 www.wstyler.com Test Sieving: Principles and Procedures A Discussion of the Uses, Capabilities, and Limitations of Testing Sieves as Analytical Tools...
- Page 14 If additional help is desired in establishing your sieve analysis procedure, or if you desire a list of suppliers of the equipment highlighted in this manual, please contact W.S. Tyler, 8570 Tyler Blvd, Mentor, OH 44060 Copyright© 2001, Advantech Mfg. a W.S. Tyler Company...
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Page 15: Table Of Contents
Table of Contents CHAPTER 1 - ....WHAT IS SIEVING? CHAPTER 2 - . . . USES, LIMITATIONS AND ADVANTAGES CHAPTER 3 - . -
Page 16: What Is Sieving
CHAPTER 1 WHAT IS SIEVING? A simplistic definition of sieving is the All mesh sizes are covered by both national separation of fine material from coarse and international standards. material means meshed The need for particle size analysis in the perforated vessel. -
Page 17: Uses, Limitations And Advantages
CHAPTER 2 USES, LIMITATIONS AND ADVANTAGES Harold Heywood wrote "I often refer to sieving as the 'Cinderella' of particle size analysis methods; it does most of the hard work and gets little consideration." There are numerous reasons for the selection of high quality testing sieves as a first choice in particle size analysis work. - Page 18 and the test is run for 30 minutes, the components and each other with strong probability of larger-than-nominal particles electrostatic charges. Additional types of finding those oversized openings is much sieving problems are discussed in the greater than if the test was run for only 15 glossary section.
- Page 19 CHAPTER 3 GLOSSARY OF SIEVING TERMINOLOGY Sieving terminology is frequently used which build up on the wire mesh and and abused in writing specifications for eventually close openings. materials. Listed below are some of the Frequently referred to as pegging. (Photo most frequently used terms and a general Page 4) discussion of their meaning:...
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Page 20: Sieve Specifications
Flow additive: powdered substance added Skirt: section of test sieve below the sieve to the sample to reduce agglomeration, mesh that allows for mating or nesting of neutralize static charges and improve the the sieves in a test stack. flow characteristics of the sample. Common additives are fine silica, activated charcoal, Support mesh:... -
Page 21: Sieve Calibration Procedures
of 3 to 1, or by skipping three sizes, you was suggested by Charles Renard of France create a ratio of 4 to 1. in 1879. His system is based on the tenth, When selecting sieves from this series, twentieth fortieth roots any number of sieves can be used for an... - Page 22 combination of methods 1 and 2, assuring specifications, which should disqualify them from use as a U.S. Standard Testing sieve. compliance with both opening size and Another problem encountered with material performance specifications. matching is the use of reference samples Probably the most elementary of the that are different in shape, size or density inspection methods is the use of the etched...
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Page 23: Performing The Sieve Analysis
sieving results. Whatever method you use, compliance necessary assure it is essential that your starting point is uniformity between and within industries. based ASTM specifications. This CHAPTER 6 PERFORMING THE SIEVE ANALYSIS In obtaining meaningful sieve analysis The following paragraphs were first data, six major steps are recommended. - Page 24 Sampling from carload shipments of manner that the composite will have the fine bulk materials same grading as the larger amount. One established method for sampling a Reduction of gross sample to test size carload of bulk granular material is to take for sieve analysis eight equal samples, (approximately 700 to 1000 grams each) from the bottom of a...
- Page 25 Sample splitters and reducers Gross samples, if not too large, may be reduced to test sample size by one or more passes through a sample splitter or Jones type riffle, which will divide a sample in half while maintaining the particle size distribution of the original sample.
- Page 26 A useful table of recommended sample sizes for tests with 200 mm or 8” diameter sieves is presented in Table 4. Note that the table gives sample sizes listed by volume. Recommended sample weights in grams can be determined by multiplying the values in Column 3 and 4 by the bulk density (grams per cubic centimeter) of the material to be tested rounded out within a...
- Page 27 At no time should a needle or other sharp object be used to remove the particles lodged in the wire cloth. Advantech metal framed sieves should not exceed 261° F (127° C). Solder will begin to soften at this point.
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Page 28: Sieve Care And Cleaning
Care should exercised should be inspected microscopically after analyzing the data in relation to the length sieving to determine the integrity of the of time the test was run. If the sample sieve cut point. contains a large amount of elongated or Table lists many... - Page 29 damage the sieve openings on the finer tend to block a large percentage of the mesh sieves. The concentrated jet of air openings reducing opportunity can cause severe 'local' damage to the wire particles to pass through the openings in cloth, and significantly reduce the accuracy the allotted agitation time.
- Page 30 EPILOG We hope that the characterization of testing sieves and their uses presented in this manual will serve as an enhancement to your current particle size analysis program. maximizing analytical advantage potential testing sieves while minimizing compensating for shortcomings and inaccuracies, the testing sieve can be a viable and precise testing tool.
- Page 31 BIBLIOGRAPHY 1. Allen, Terence, Particle Size Measurement, Chapman and Hall, New York 1981. 2. Leschonski, Kurt “Sieve Analysis, The Cinderella of Particle Size Analysis Methods?”, Powder Technology, Elsevier Sequoiz S.A. , Lausanne, 24 (1979) 3. Heywood, Harold, Proc Particle Size Analysis Conference, Bradford, 1970.
- Page 33 STANDARD SPECIFICATION FOR WOVEN WIRE TEST SIEVE CLOTH AND TEST SIEVES ASTM E11 - 15 Nominal Dimensions and Permissible Variations for Sieve Cloth and Compliance, Inspection and Calibration Test Sieves (13) (14) (15) Permissible Range Resulting Sieve Designation ± Y of Choice Nominal Sieve Maximum...
- Page 34 Table 2...
- Page 35 Table 3 . . .
- Page 36 Table 3, cont’d.
- Page 37 Table 4...
- Page 38 Table 5...
- Page 39 Table 6...
- Page 40 VariSifter™ Frequently Asked Questions For specific sieving procedures, please refer to Test Sieving: Principles and Procedures located in the User’s Manual. Can I use one sieve and fill the rest of the stack with spacers? Yes, a single sieve can be used at a time. Be sure to add spacers at the top of the stack and place the sieve at the bottom.
- Page 41 Metal 3” sieves are not compatible. Does Advantech/W.S. Tyler have a repair facility nearby? Advantech/W.S. Tyler is pleased to offer telephone repair support for the VariSifter, when appropriate. Contact a member of our Tech Support Team at 800-321-6188. Best practice is for machines to be sent in to our location in Mentor, OH for extensive repair or refurbishing.
- Page 42 My questions have still not been answered. For further technical support, please contact our Tech Support Team at: Advantech Manufacturing, Inc. a W.S. Tyler Company 8570 Tyler Blvd, Mentor, OH 44060 T. 800-321-6188 | F. 440-974-0921 E Mail: info@wstyler.com Web Site: www.wstyler.com...
- Page 43 Terms Driver (X465030): The driver looks like a speaker and produces the sonic vibrations that agitate the particles. Cam Assembly (X465035): The cam assembly is the spring-loaded pivot block. Column Lock (L3-N1): Locks the test stack together for easy insertion and removal from the test chamber.
- Page 44 Troubleshooting Problem Possible Cause Unit won’t work Check plug input to unit, then plugged in. check fuse. Unit will sift, but not pulse. Pulse timer inoperative. Call for technical support. Unit comes on, but will not sift Make sure stack assembly is or pulse.
- Page 45 Notes _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________ _____________________________________...
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