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9/03 

Microtrac S3500 Particle Size Analyzer Operation and Maintenance 

iii 

 

 

 

About This Document 

Abstract 

This manual describes the operation and maintenance of the Microtrac S3500 Particle Size Analyzer.  The 
operating portion of this manual is intended for use with the Microtrac Flex Software Operations Manual. 

Revision Notes 

The following list provides notes concerning all revisions of this document. 

Revision Date 

ECN 

Notes 

A 1/04 

ME0202 

Initial 

release 

References 

Microtrac Documents 

The following list identifies all Microtrac documents that may be sources of reference for the material 
discussed in this publication. 

Document # 

Document Title 

SW0003 

Microtrac Flex Software Operations Manual 

SI-RT-01 

Fluid Reference Table 

SI-RT-02 

Particle Refractive Index Table 

Contacts 

The following list identifies important contacts within Microtrac. 

Organization Telephone Address 

Microtrac Technical Support 

1-727-507-9770 

12501-A 62nd Street North 

Largo, FL 33773 

Summary of Contents for S3500

Page 1: ...Microtrac S3500 Particle Size Analyzer Operation and Maintenance Manual OM0006 1 04 ...

Page 2: ...E Mark directive shall not be assumed WARNING This is a class A product In a domestic environment this product may cause radio interference in which case the user may be required to take appropriate measures CAUTION This product is intended for use in environments defined by IEC Pollution Degree 2 generally what would be expected in an office or laboratory Industrial environments or those that may...

Page 3: ...isions of this document Revision Date ECN Notes A 1 04 ME0202 Initial release References Microtrac Documents The following list identifies all Microtrac documents that may be sources of reference for the material discussed in this publication Document Document Title SW0003 Microtrac Flex Software Operations Manual SI RT 01 Fluid Reference Table SI RT 02 Particle Refractive Index Table Contacts The...

Page 4: ... 1 Fluid Connections for Wet Sample Delivery 11 2 4 2 Dry Sample Delivery Connections 12 2 5 Electrical Connections 14 2 5 1 Power 14 2 5 2 Communications 14 2 5 3 Ultrasonic 14 2 5 4 Dry System Connections 15 2 6 Linear Dry Feeder Setup 15 3 OPERATION 17 3 1 General 17 3 2 Sample Delivery 17 3 3 Dispersion 19 3 3 1 Wet Sample Dispersion 19 3 3 2 Dry Sample Dispersion 20 3 4 Particle Size Measurem...

Page 5: ...1 Microtrac S3500 Analyzer System 1 Figure 1 2 Laser Safety Labels 5 Figure 2 1 Wet and Dry Sample Cells 10 Figure 2 2 Conversion Sequence from Wet to Dry Sample Cells 11 Figure 2 3 Typical Fluid Connections SDC Pictured 12 Figure 2 4 Vacuum Connections 13 Figure 2 5 Air and Electrical Connections 13 Figure 2 6 Linear Dry Feeder with S3500 and SDC 15 Figure 2 7 Sample Delivery Tube Fittings Instal...

Page 6: ......

Page 7: ...articles The amount and direction of light scattered by the particles is measured by an optical detector array and then analyzed by the Microtrac Software Particulate samples may be delivered in a wet or dry state depending on the characteristics of the sample and the sample delivery equipment configured with the system The ranges of size measurements are described in Table 1 1 Figure 1 1 Microtra...

Page 8: ...tion of SRA150 operation from optics through data calculation The Standard System is fully traceable to your current Microtrac SRA150 Special System Uses the tri laser system to provide a wet range down to 09 microns and a dry range down to 25 microns The Special System is also fully traceable to your current Microtrac SRA150 as described in the Standard System Extended System The lower range limi...

Page 9: ...n and any inherent hazards it may impose are beyond the control of Microtrac Inc It is the user s responsibility to identify any hazards caused by solvents and sample materials and to take appropriate measures where necessary to prevent physical contact with these substances or their vapors ignition or other dangerous conditions CAUTION The user of this equipment is responsible for the proper hand...

Page 10: ...l filters or traps are required for the sample effluent before it can be discharged into the drain Depending upon the materials and solvents the sample effluent may also require a settling tank or purging procedure prior to being drained into the municipal waste treatment system or disposed of according to local safety standards Local sewage disposal ordinances also dictate what fluids can be disc...

Page 11: ...s radiation exposure Laser Interlock The interlock safety feature consists of three microswitches in series which must be closed to allow the lasers to operate One safety interlock microswitch is closed when the access cover of the S3500 is closed Two additional microswitches close when the sample cell chamber access cover is closed With both access covers closed the lasers can be activated under ...

Page 12: ...5 pin male female straight through interface cable Ultrasonic Power Output optional Coaxial cable BNC connectors Lasers Wavelength 780 nm Power 3 mW nominal Environmental Temperature 10 to 35ºC Humidity 90 RH non condensing maximum Storage Temperature 10 to 50ºC dry only Pollution Degree 2 Connection Ports Wet Operation Fittings 3 8 316 stainless steel Connection Ports Dry Operation Vibratory Inle...

Page 13: ...als in fluid path Dry Operation 303 stainless steel anodized aluminum black chrome plated 303 stainless steel optional 302 stainless steel PVC HDPE Vacuum subject to change by manufacturer paper cotton glass fiber aluminum EVA Physical Specifications Case Material Steel and impact resistant plastic Finishes Exterior surfaces finished with corrosion resistant paint or plating Dimensions 14H x 22W x...

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Page 15: ...ewer CAUTION An emergency cutoff valve is an essential part of any installation using wet sample delivery Microtrac recirculators do not incorporate integral manual cutoff valves due to the wide variety of installation conditions It is strongly recommended for installations using a pressurized or gravity fed fill line that the user provides an emergency cutoff valve within easy access of the equip...

Page 16: ...n Wet and Dry Sample Cells Different sample cells are used for wet and dry operation See Figure 2 1 Verify that the correct sample cell is installed for the type of delivery desired Wet Sample Cell and Holder Dry Sample Cell Figure 2 1 Wet and Dry Sample Cells The S3500 was designed for quick and easy conversion from wet operation to dry and vice versa The following instructions describe changing ...

Page 17: ...Retainer knobs The Retainers will rotate away from the Sample Cell Holder Remove the Sample Cell Holder 6 Insert the Dry Delivery Cell and tighten the Sample Cell Retainer knobs The retainers will swing into position as you begin to tighten them 7 Snap the Vacuum Tube Elbow into place on the bottom of the Dry Delivery Cell 2 4 1 Fluid Connections for Wet Sample Delivery CAUTION If solvents are bei...

Page 18: ...sure that tube ends are cut straight and perpendicular to the tube and that they are fully inserted into their fittings Improper connections at the fittings can cause crevices where sample can accumulate Refer to the recirculator manual for details 2 4 2 Dry Sample Delivery Connections Vacuum All dry sample delivery systems use vacuum to remove sample With the dry sample cell installed in the anal...

Page 19: ...on valve allows local clean up of the area Do not use the clean up wand during a measurement since airflow has an effect on measurement results See Figure 2 4 Figure 2 4 Vacuum Connections Eductor Air Eductor air is controlled by a valve and regulator mounted inside the S3500 analyzer Connect an air supply to the Air In port using the 4mm flexible tubing supplied Simply push the tubing into the fi...

Page 20: ...l computer cable is proprietary see section 1 4 for details Its connectors are marked PC and Analyzer Insert the end marked PC into the serial port of the personal computer and the end marked Analyzer into J1 on the S3500 Tighten the screws on both connectors hand tight Note that the Microtrac application software must be configured to associate the S3500 with the correct serial port See the appro...

Page 21: ...he cord from the vibrator to the outlet marked VIBRATOR on the device controlling dry delivery The vibrator trough attaches by inserting the trough studs in the clamp attached to the vibrator The clamp lever position is adjusted by pulling on the lever to disengage and rotating to the desired position Move the levers so they point in the direction shown in Figure 1 1 when tight 2 6 Linear Dry Feed...

Page 22: ... is long enough to prevent binding as the traveling arm moves through its stroke Figure 2 7 Sample Delivery Tube Fittings Installation Electrical Connections Connect the 25 to 9 pin communications cable to the Linear Dry Feeder and to a COM Port on the PC This Com Port must be selected in the Microtrac software to operate the Linear Dry Feeder Please refer to the appropriate software manual Connec...

Page 23: ...action Particle Size Measurement 3 2 Sample Delivery The S3500 can measure size distributions of particles in dry form or suspended in a liquid A variety of sample delivery devices are available from Microtrac to fit the specific needs of your materials application environment and budget Please refer to the manual s for the device s that accompany your system It is important to understand that sam...

Page 24: ...he correct sequence of operations Please refer to the Microtrac software manual for details on dry sample measurements The two primary methods of dry sample delivery are Vibratory and Aspiration Vibratory delivery is generally used for materials in the 10 µm to 3000 µm size range Aspiration is well suited to materials in the 0 25 µm to 500 µm size range and to materials that are prone to agglomera...

Page 25: ...om occurring while a measurement is made Wet sample dispersion consists of two steps adding wetting agents to reduce surface tension and promote mixing in the carrier fluid and applying ultrasonic energy to break up the agglomerated sample into discrete particles Wetting Agents Wetting agents include water surfactants dispersants and solvents Please refer to the appropriate recirculator manual for...

Page 26: ...ee Figure 3 3 Eductor Set at 3 Turning Up Air Pressure Figure 3 3 Eductor Gap and Air Pressure Settings 3 4 Particle Size Measurement A laser beam is projected through a sample cell that contains a stream of moving particles suspended in a liquid or air Light rays that strike particles are scattered The scattered light forms an angular pattern which is measured by the photodetector arrays The phot...

Page 27: ...on that forces spherical shape Liquid in liquid emulsions polystyrene spheres and solid glass spheres are a few examples Irregular Most particles are non spherical including ground or crushed material crystalline material ceramic and crystallized materials The optical resonance disappears for the non spherical particle so the variation in scattering is less extreme than with the spherical particle...

Page 28: ...ench in the face of the lens retaining nut as shown and rotate it toward the front of the S3500 If it was over tightened before it may be necessary to tap lightly on the wrench to loosen the nut Loosen the nut only until it turns freely on the lens body Rotate the lens approximately 1 3 turn counter clockwise until it stops The three locating lobes are now aligned with the slots in the optics hous...

Page 29: ...Service 9 03 Microtrac S3500 Particle Size Analyzer Operation and Maintenance 23 Figure 3 4 Collector Lens Change ...

Page 30: ...mount and severity of S3500 use If the SETZERO numbers are within limits cleaning of the optical sample cell and optics system is not necessary and not recommended SETZERO measurements determine whether background is within acceptable limits If high background is not corrected by cleaning the optical elements contact Microtrac Technical Support Cleaning the interior of the sample cell is much more...

Page 31: ...ell The sample recirculating system must be drained and rinsed thoroughly one to four times with clean fluid after each use Leave the system filled with fluid when it is not in use to reduce sample cell spotting The number of rinses required will depend on the sample materials and surfactants or dispersants used Under normal conditions simply rinsing the interior of the sample cell with clean flui...

Page 32: ...overed splint or pipe cleaner between the windows of the Sample Cell and gently wipe the inside surfaces Two or three strokes should be sufficient for cleaning Vigorous cleaning is not necessary and may scratch the surfaces 8 Prepare a clean tissue covered splint or cotton tipped swab as in step 6 9 The outside surfaces of the sample cell windows rarely require cleaning Cleaning should be avoided ...

Page 33: ...heck for leaks at the top and bottom of the Sample Cell A flashlight is helpful for this step 15 If there are no leaks leave the system filled with clean fluid Close the sample module door Cleaning the Dry Sample Path All Microtrac dry delivery devices are designed for easy cleaning Please consult the appropriate manual for specific cleaning instructions The S3500 dry cell tends to be self cleanin...

Page 34: ...Maintenance section 5 2 Electrical There are no user serviceable electrical components inside the S3500 Should a problem occur that cannot be cleared using the procedures in this manual please contact Microtrac Technical Support Actions the user can take include the following CAUTION Turn off all power to the personal computer and all devices in the Microtrac analysis system before performing any ...

Page 35: ...attempt operation of the unit S3500 Not Responding to the Computer Interface cable not connected Improperly configured computer serial port Connect the Microtrac communications cable see section 5 4 between the proper computer serial port and the S3500 Configure the Microtrac Software serial port assignments Laser Failure Laser on SAFETY interlock implemented Verify that the Sample Door is engagin...

Page 36: ...1 Sample cell O ring perfluoroelastomer 158788 PC communications cable proprietary 900318 001 SDC communications cable 900379 001 SDC ultrasonic coaxial cable 900380 001 AC power cord 338569 AC power input module fuse 250V 1A Each Fuse Kit 4 900070 01000 900098 091 AC power input module fuse 250V 0 5 A Each Fuse Kit 4 900070 00500 900098 092 Note Many of these items are available in convenient kit...

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Page 38: ...Microtrac Inc 12501 A 62 nd Street North Largo FL 33773 ...

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