890112VB Operating Instructions Vibratory Sieve
Contents
1. Page 3 7 1 Supply of the rinsing liquid The rinsing liquid i e water alcohol etc is supplied by connecting a tube to the quick coupling device in the centre of the wet sieve head The quantity of the liquid must be determined in order to avoid a backwater The maximum quantity of the liquid is limited by the 3 spray nozzles in the wet sieve head approx 1 5 litres min at about 2 bar A uniform steady pouring out of the liquid out of the wet sieve pan is an indication of a good distribution of substance to be sieved and liquid If the liquid stops pouring out of the wet sieve pan then this indicates a backwater in one of the sieves This can lead to overpressure in the sieve stack and to damaging the woven mesh of the sieves In such a case you must remove immediately the plastic screw in the center of the perspex dome of the wet sieve head Remark That hole can also be used to add some wetting agent if after some minutes of sieving the wetting agent should have been rinsed out by the liquid 7 2 Wet sieving of substances difficult to sieve When substances which are difficult to sieve should be sieved wet you should reduce the quantity of the substance to be sieved and select a more narrow range of the mesh openings of the sieves When wet sieving a suspension beeing smaller than 200 um it is recommended to sieve the individual fractions Even if a sieve stack has already been placed and the sieving has been start2. 31 014 17 Plexiglaskuppel f Trockensiebkopf dome safety glass f dry sieving hea 31 017 16 seal ring for sieving head lid frame of sieving head C P 0 TEILE c P 0 PARTS 00 100 13 mounting for lid 00 011 17 hood safety glass PREIS ME IN_DM S 7 ejajalelejatalelelm opacar 10 11 12 Fae 14 15 16 17 ee ea 18 Q 19 IL CAT LLL If LLT AN EE IIIA FGG i Taaa SS SNAN III year ZI ER KINI Yt rai STIER ZAA ami BL 9 L nge Length 335 mm Breite Width 270 mm H he Heighf 200 mm Aann TE AHANI pry FRITSCH GMBH puluerisettel Laborger tebau fanalyrettel Pulverisette 0 laberette Analysette 3 Labormikrom hle Laborsiebmaschine 43 87 Benennung we Nec hleuus Jemurhanenrechisgesae onde u T901 stenun uns zu Die Zech uty Jul weuer vervieituingt noch dem Oren velbawerd vuar Ontlen 4 M werden Gesels vom 7 angich ge b 1908 Frama toterunzen nach DIN 7168 dumurkungen FRITSCH GMBH IDAR OBERSTEIN enennung Anschlu klemmen aJ3 pO Zeichn Nr ee TLE 3101 ndm Atef ochte aut somi rheberechtger eir com 13 1701 sionen uns u Ce decr ur Jet cadet seceetnihgt NICA sem Wersesern aster Criten ev ITT Sy 3 un aerden Caselr eam FRITSEH FRITSCH GMBH IDAR OBERSTEIN 81 104 00 A31 PO 0 x I00n 250V Stue Erqmnliserie gen Ste Foee we emlmeseree tiert semen 158
3. fixed with the lever 13 By turning the star screws 11 to the right clockwise the sieve stack is uniformly and firmly tightened the toothened straps should be tight as a string after the tightening Attention For safety sake reduce the vibration intensity of the shaker to the lowest setting before switching it on Once it is switched on the timer will ensure that the vibration intensity is slowly increased to the optimal level Very fine sieves are particularly susceptible to damage in the event of a surge when the shaker is switched on 6 Dry sieving When dry sieving the sieves are placed on a dry sieve pan without outlet Then the substance to be sieved is placed on the top sieve the sieve head is placed on the top sieve and the sieve stack is fastened see paragraph 5 To reduce the sieving time sieving aids can be placed in every sieve with meshes larger than 30 um Agate balls 10 mm in diameter 10 per sieve Order No 55 010 05 or rubber balls 20 mm in diameter 5 per sieve Order No 31 018 15 7 Wet sieving When wet sieving the sieves are placed on the wet sieve pan with outlet and evacuation tube The substance to be sieved should have been dispersed in suspension as well as possible using a wetting agent if necessary It is now poured onto the top sieve and the wet sieve head is fastened in place Attention Make certain that the sieve rings provide a tight seal analysette 3 pulverisette 0
4. result in the grinding balls on the material to be ground bouncing against the lid and destroying it in the event of a surge when the pulveriser is switched on analysette 3 pulverisette 0 Page 6 The amplitude setting vibration intensity selected for grinding samples must permit the balls on the material to be ground to bounce The measurement arrow on the lid is used to set limit and control the intensity The point of intersection of the middle lines indicates the intensity in mm during operation Between 0 1 to 10 cc of the substance to be ground can be placed in the mortar bowl dry or in suspension The tight seal of the lid prevents any material losses due to splashing or dust formation The obtainable final size with the micro pulveriser depending upon the grindability of the sample and the milling time is around 95 smaller than 10 to 20 ym In some cases also final sizes of smaller than 10 um can be reached 11 MAINTENANCE Apart from the necessary regular cleaning the sieve shaker and micro pulverizer require no maintenance The following situation may arise after protracted operating time 1 The material to be sieved no longer spreads evenly over the sieve surface or 2 the maximum vibration intensity of approx 3 mm is no longer achieved The first difficulty can be rectified by adjusting the spring loaded feet If this does not suffice the screws holding the permanent elastic springs must be tight
5. the first spacer to the funnel with a fast locking clamp 9 1 1 Wet sieving Special instructions must be observed when wet sieving with micro precision sleeves Mount the funnel and the spacer as for dry sieving The evacuation tube has to be closed with a tube clamp The unit is switched on with timer 1 Attention Afterwards fill the funnel and the spacer with fluid to a point over the O ring Insert the sieve at an angle with the sieve foil at the bottom analysette 3 pulverisette 0 Page 5 If a number of sieves are to be used for sieving in the sieve tower assemble these in the same manner Attention The inflow and outflow of the liquid has to be controlled so that the sieve tower remains full during the entire sieving operation After the sieving in the top sieve is ended lower the level of the liquid to the level of the sieve foil close the outlet again and remove the lid of the sieve together with nozzle spacer and sieve Afterwards replace and tighten the lid and the sieve out the following sieve 9 2 Cleaning the micro precision sieves Attention handle the sieves very gently For the thorough cleaning of the micro precision sieves we recommend the ultrasonic bath laborette 17 However the micro precision sieves MUST NOT be placed directly into the ultrasonic bath but in a glass container i e a beaker glass with a wall thickness of about 4 mm When placing the micro precision sieves directly
6. 890112VB Operating Instructions Vibratory Sieve Shaker analysette 3 Vibration Micro Pulveriser pulverisette 0 The analysette 3 is a vertically vibrating laboratory throw principle sieve shaker for the exact separation and classification of grain sizes Dry powders as well as particles suspended in a liquid can be analysed as to their size Depending upon the charged quantity and the particle size distribution sieves and pans with many different diameters and heights can be placed on the sieve shaker Dry and or wet sieving is possible with metallic woven mesh sieves or plastic sieves Micro precision sieving is possible with galvanic produced micro precision sieves The throw principle sieve shaker can be converted into a micro pulveriser pulverisette 0 and is therefore also suitable for the micro milling of laboratory samples pulverisette 0 see paragraph 10 1 Method of operation The plastic housing contains an electronically controlled electromagnet which is mounted on a sturdy cast base This electromagnet vibrates the vibrating plate which is connected to the base by 3 permanent elastic leaf springs 3000 vibrations per minute are vertically transmitted to the plate The vibration intensity amplitude can be continuously selected up to 3 mm When using micro precision sieves the vibrating plate is vibrated at a set constant amplitude with 6000 vibrations per minute An additional electronic control permits to interru
7. TE ri Cs teen as FRITSCH GMBH Vols l IDAR OBERSTEIN
8. ed the sieving of individual fractions can still be made When the sieving of the top sieve is finished no more smaller particles than the mesh openings remain on the sieve the wet sieve head is removed and the top sieve is taken away The wet sieve head is then placed on the underneath sieve This ensures that the sprays of the nozzles are directly concentrated on the substance to be sieved and that the sieve surface and the substance are much better rinsed The spray nozzles are positioned in a way to ensure that the substance is sprayed from the inside edge of the sieve towards the centre and that also the inside of the sieve frame and the dome of the wet sieve head are permanently rinsed and kept free from deposits of substance 7 3 Wet sieving with interposed spray ring When wet sieving difficult to sieve substances an interposed spray ring can be placed on a lower sieve in order to avoid a backwater After the connection of such a ring to the tube system 3 spray nozzles of the ring additionally spray liquid on a problematic sieve fraction and thus counteract a possible backwater If required up to two interposed spray rings plus the wet sieve head can be inserted into the sieve stack and connected to the liquid supply analysette 3 pulverisette 0 Page 4 7 4 Collecting the smallest particles If eventually the smallest particle size the one coming through the sieve with the smallest mesh openings has t
9. ened as in the second case To do so loosen the three screws in the middle of the vibrating plate and lift it Then uniformly tighten the fastening screws at the outer end of the springs Use torque wrench target value 14 Nm equal to about 1 4 kpm 12 Guarantee The guarantee card supplied together with this instrument must be returned to the manufacturer duly filled out This is an absolute must as otherwise the guarantee will not become effective We FRITSCH GMBH Manufacturers of Laboratory Instruments IndustriestraBe 8 D 6580 Idar Oberstein West Germany and our application laboratory respectively our agent in your country are at your full disposal to help if your FRITSCH instrument should not give you entire satisfaction Please do not forget to mention the full serial number of the instrument in the case of any queries analysette 3 pulverisette 0 Page 7 13 Table of contents 1 Method of operation are rei 1 2 Setting up the sieve shaker ccceccecccecces 1 3 Power Supply zus nn ae 2 3 1 Checking for proper voltage and current elisa seta sist 2 3 2 Electric TUSS au oe tower Nr 2 4 Operating elements u nn nn 2 5 Positioning the sieve stack cece eee ee enone 3 6 Dry SHOVING nern 3 7 WETS LOVING wann Gees reek ed 7 1 Supply of rinsing liquid ua en 4 7 2 Wet sieving of substances difficult to sieve 4 7 3 Wet sieving with interposed spray ring 4 7 4 Collecting the s
10. into the bath or when using a glass with a smaller thickness the ultrasonic cleaning can lead to a damage of the micro precision foils Place the micro precision sieve the foil to the top in the cleaning liquid The glass beaker with the sieve is placed into the insert tray of the ultrasonic bath Before switching on the ultrasonic bath you must check the height of the liquid in the bath It should be about 3 5 cm below the upper edge of the bath in order to reach a good coupling with the ultrasonic energy Do not operate the ultrasonic bath longer than 3 minutes when cleaning the micro precision sieves 10 Conversion to micro pulverizer When using the sieve shaker as a micro pulveriser the grinding mortar is placed into the recess of the vibrating plate and the grinding ball is placed into the mortar bowl Then charge the substance to be pulverized place the lid on the mortar bowl hang in and pre fasten the toothened tightening belts and firmly tighten them by turning the star knobs to the right Best possible grinding results are obtained at lower to middle amplitude setting because the milling frequency of the grinding ball is the highest at such a setting Attention For safety sake reduce the vibration intensity of the micro pulveriser to the lowest setting before switching it on Once the pulveriser is switched on the timer ensures that the vibration intensity is slowly increased to the optimal level Failure to do so could
11. mallest particles eceeee 5 8 Cleaning the sieves cceccccesccccscccccecces so 5 9 Sieving with micro presicion sieves cece eee 5 9 1 Assembling the sieve stack cccec ccc ec ee cece 5 95121 WEE sieving essen ni 5 9 2 Cleaning the micro precision sieves eeeeee 6 10 Conversion to micro pulveriser cece e cece ees 6 TI MAINTENANCE een anni 7 12 Guarantee 2 30 a re 7 13 Table of Contents area tes ayaa 8 analysette 3 pulverisette 0 Page 8 4 3 87 ERSATZTEILLISTE VIBRATIONS SIEBMASCHINE UND MIKROMUEHLE A 3 P 0 220V 110V SPARE PARTS LIST VIBRATORY SIEVE SHAKER AND MICRO PULVERIZER NR JARTIKELNR BEZEICHNUNG DESCRIPTION A gt COMMON PARTS 03 12 15 rubberplate 03 124 00 spring assembly f 60Hz cpl 03 123 00 spring assembly f SOHz cpl 90 042 00 set of screw f springs 60Hz 90 041 00 set of screw f springs S0Hz 81 105 00 electronic module cpl 110V AC 81 106 00 electronic module cpl 220V AC 81 003 00 electro magnet 110V 30Hz 1 002 00 electro magnet 220V 25Hz o310016 Genaeuse Hg 03 120 00 tension belt cpl 03 121 00 tightener f tension beit 03 105 14 lever f tension belt 03 106 14 clamping foot f tightener 81 877 00 knob for timer 03 122 00 spring foot cpl 81 806 00 control knob for amplitude 81 807 00 control knob for operation mode 92 603 00 Sterngriff M10 50 mm star grip screw M10 50 mm B A 3 TEILE BY A 3 PARTS
12. n the support and the fuse is accessible Replacement fuse 2 A slow 5 x 20 Attention before opening the instrument plug out the main connection 4 Operating elements Timer position off position continuous operation selection sieving time 0 to 60 minutes Amplitude control 1 10 the vertical vibration intensity is continuously selectable 0 to 3 mm and can be controlled while the instrument is operating at the intersection of the two middle lines of the scale in mm example below 1 3 mm Interval setting 0 6 interruption of the sieving process for about 2 seconds The time period between the interruptions is stepless settable Function switch inter 3000 vibrations per minute amplitude control interval setting perm 3000 vibrations per minute amplitude control no interval setting micro 6000 vibrations per minute amplitude constant fixed no interval setting analysette 3 pulverisette 0 Page 2 5 Positioning the sieve stack The vibrating plate can accept up to 8 sieves 50 mm respectively 2 height or 16 sieves 25 mm respectively 1 height plus the sieve pan and the sieve head The sieves are stacked on upon the other and seal rings are placed between them increasing mesh openings to the top After having placed the sieve stack on the vibrating plate 5 the tension belt system 11 is hang into the sieve head 4 the toothened belts are guided through the clamping feet 14 and
13. o be collected then the evacuation tube can for instance be connected to a suction filter 8 Cleaning the sieves To ensure that the sieves are thoroughly cleaned we recommend using the ultrasonic bath laborette 17 and placing the sieves in it in an upright position or upside down Brushes can damage the woven mesh gauze and should only be used for stronger large mesh sieves Wherever possible the sieves should be cleaned after each use The sieves can be dried in a drying oven at max 95 C The drying time can be reduced by rinsing the sieves with alcohol beforehand 9 Sieving with micro precision sieves Only small quantities can be sieved with micro precision sieves A few hundred milligrams to no more than a few grams can be sieved depending on the particle size distribution and the mesh size of the sieve The suitable feed quantity is ascertained through experimentation When sieving with micro precision sieves set function switch 4 to the micro position Sieving is carried out at a constant vibration intensity 9 1 Assembling the sieve stack The vibrating plate of the instrument has 3 screw threads which are closed by plastic inserts Remove these 3 plastic parts Then the funnel can be fastened to the vibrating plate with the 3 spanners and knurled screws The funnel should be well centered on the vibrating plate The 3 spanners are then laying on the lower edge of the funnel and on the vibrating plate Then fasten
14. pt the sieving process after a preset time for about 2 seconds interval setting This reduces considerably the sieving time especially when sieving very light substances i e flour plastics etc 2 Setting up the sieve shaker The sieve shaker should be placed on an even stable surface It is not necessary to fix it to its position but the instrument must be easily accessible and a sufficient free place for placing the sieves next to the shaker must be available The instrument rests on 3 spring loaded feet 16 These feet allow to level the instrument in order to obtain a uniform distribution of the sieving substance on the total sieving surface analysette 3 pulverisette 0 Page 1 3 Power supply 3 1 Checking for proper voltage and current Before connecting the sieve shaker you must compare the voltage and current indications on the serial plate of the instrument with the values of your network 110 220 V A C with earth 50 respectively 60 Hz fuse max 16 A 3 2 Electric fuse The instrument fuse is positioned on the printed circuit board of the electronic control module To replace a fuse first withdraw respectively unscrew the control knobs from the front plate Then unscrew the screw behind the amplitude control knob and the 4 screws connecting the front plate with the housing Underneath the instrument unscrew the 2 screws connecting the plastic support of the electronic module with the cast base Then pull dow
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