Operating Instructions - Laboratorium
Contents
1. Page 4 PULVERISETTE 16 __ FRITSCH 1 3 Explanation of the symbols used on the device and in the operating instructions Attention Warning against danger spot Observe operating instructions Attention Mains voltage Attention Hazard of explosion Wear ear protection Wear protective gloves Spraying with water forbidden Do not step below lifted load Page 5 PULVERISETTE 16 FRITSCH r ios _ 1 4 Brief description of the device 1 4 1 Fields of application The cross beater mill serves primarily for preliminary and fine comminution of medium hard brittle materials up to Mohs hardness of 6 Thanks to a large selection of accessories the cross beater mill is a device with wide ranging fields of application primarily in the areas of chemicals and ceramics in min ing and metallurgy as well as in the preparation of soil samples etc in the laboratory and in industry The achievable final fineness depends on the hole width of the bottom sieve and the grinding properties of the material to be ground Under good condi tions fineness levels lt 100 um can be achieved Typical applications for soft materials Needles leaves grain resins cellulose chemicals2. Page 12 PULVERISETTE 16 3 5 support Lift the mill onto the support with 2 people Important Secure the de vice against tipping until it is completely screwed in place since the mills centre of gravity allows it to tip for ward Then fasten the mill to the installation plate with the supplied fastening materials Page 13 __ FRITSCH Fastening of the pulverisette 16 to the universal Attention Warning against danger spot SISSANTA Warning against hand injury PLOS ZUST MONTAGE oulverisette 16 PULVERISETTE 16 FRITSCH os 3 6 Electrical connection CAUTION Electrical Safeguard Danger of damages due to short circuit e Ensure that the socket is connected to a power line se cured with a circuit breaker Scenes oo oe mE The electrical connection may only be created by a qualified electrician The voltage and frequency of the cross beater mill can be found on the type plate Make certain that the values match the existing power network CAUTION Non observance of the values on the type plate may dam age electrical as well as mechanical components a Connect the cross beater m
3. The composition percentages listed above represent average values 5 gt lt Fe x Page 8 PULVERISETTE 16 2 2 __ FRITSCH il Operating safety General safety instructions Study the operating instructions carefully All operators must be familiar with the contents of the operating in structions For this purpose always keep the operating instructions within easy reach Do not remove the instruction labels Do not disable safety devices Independent conversions of the device negate the conformity with European directives declared by Fritsch and void the warranty The cross beater mill is intended exclusively for use as specified in the section 1 4 1 Any other use is considered improper the manufacturer accepts no li ability for damages resulting from improper use In addition to the operating instructions observe and instruct adherence to all generally applicable statutory and otherwise binding regulations on accident prevention and environmental protection If a noise level of 85 dB A is reached or exceeded hearing protec tion should also be worn to prevent hearing damage Use original accessories and spare parts only Failure to adhere to this may jeopardize the protection of the machine Do not continue using damaged accessories The occupational exposure limits of the valid safety instructions must be observed and if necessary ventilation should be provided or the ma chi
4. e Symbols on the device warn about possible dangers or refer to these op erating instructions The symbol in the right page margin triangle with an exclamation point indicates general dangers and refers to the operating instructions e These operating instructions do not constitute a complete technical de scription They describe only the details required for safe operation and maintenance for usage under normal conditions e The copyright to these technical documents is the property of Fritsch GmbH Laborgeratebau e These operating instructions are not to be reprinted or copied without the express approval of Fritsch GmbH Laborgeratebau Page 3 PULVERISETTE 16 _ FRITSCH 1 2 Warnings Used The following symbols are used in this description to indicate important in formation and possible dangers DANGER Indicates a direct danger with high risk that will lead to death or severe physical injury if not avoided E WARNING Indicates a possible danger with moderate risk that could lead to death or severe physical injury if not avoided A CAUTION Indicates a danger with low risk that could result in slight or moderate physical injuries or material damages if not avoided
5. Warn about repair work with a sign Put safety devices back into operation after maintenance and repair work Only have repair work performed by experts The limit switch and the motor brake should be tested for proper function every six months e Limit switch on the door hinge on the left o With an opening gap of max 3 mm the limit switch must switch off the motor e Limit switch on quick latch on the right o Upon a rotation of the hand wheel of max 45 the motor brake must be activated e Motor brake o Start device o Stop device o If the braking time exceeds 0 5 seconds contact a service technician Page 20 PULVERISETTE 16 _ FRITSCH 8 Warranty The warranty card enclosed with the machine upon delivery must be com pletely filled out and returned to the delivering factory so that the warranty can enter into effect Online registration is also possible More information can be found on your warranty card or on our website http www fritsch de The company Fritsch GmbH in Idar Oberstein and your Technical Applica tion Laboratory or the corresponding national representatives would be happy to provide you with advice and assistance Please include the serial number given on the type plate along with any questions NOTE Please note that the original Fritsch packaging must be used in the event that the machine is returned Fritsch GmbH is H not responsible for damages re
6. 16 4 3 Opening and closing the mill NOUSING c cccccceecseeeeeceeeeeesseeeeeeeeeeeeeens 17 4 4 Inserting the bottom SICVE ccccccceeccceeeeecceececceeeeeceaeeesseeeseeeeesaaeeessaaeess 18 4 5 Filter hose and Collecting VESSEl cccscccseeeeceeeeceeeecceeeceeeeecneessueesseeeens 18 4 6 Adding material fOr grinding cccccsecccseececeeeeseeeeceeeeseeeseueessaeesseeeesaees 18 4 7 Readjusting ING impact gap etree ceenceeececevueteeacraeshs vevatsscomenceveaeonentaveunsd seed 19 5 CIO INAS seats vas S AA E 19 6 Mam TOTO CO res cce E me seen E 20 7 Required inspections varracecenecavnccecnecnessuersesntencatdeeesermcecmnestecsaeneseseseessees 20 8 WaN Y oeri ne a E EEE E E A EEE AEEA EARE ERRE 21 9 DIS CANNOT E E E E ashen ssmetectomuenusesusoasen 21 Page 2 PULVERISETTE 16 __ FRITSCH 4 1 General Introduction 1 1 Notes about the operating instructions e Study the operating instructions carefully e The cross beater mill pulverisette 16 is referred to below as the cross beater mill e All operators must be familiar with the contents of the operating instruc tions e Please follow the notes for your safety e The cross beater mill was designed from a perspective of user safety however some residual dangers could not be eliminated Follow the ad vice in these instructions to avoid risks to users e The symbols in the right hand margin highlight the risks described in the text
7. GMBH expressly reserves the right to amend and or to update these operating instructions without prior notice The same applies to changes and improvements to the products described in these operating in structions The onus for obtaining information about the current status of these operating instructions lies with the individual user In this regard please contact the FRITSCH GMBH distributor in your area or apply directly to Fritsch GmbH Industriestrasse 8 D 55473 Idar Oberstein Germany Not all parts illustrated must be built into the product A right to delivery of these parts does not exist If interested in them please contact the FRITSCH GMBH distributor in your locality or Fritsch GmbH Industriestrasse 8 D 55743 Idar Oberstein directly Page 21 PULVERISETTE 16 _ FRITSCH FRITSCH GMBH endeavours with the greatest of care to continually im prove the quality reliability and safety of their products and to conform with the state of the art The products supplied as well as these operating instruc tions correspond with at the time of transfer from the influence area of FRITSCH GMBH the respective state of the art Customers agree and acknowledge that through usage of the product de fects faults or errors cannot be ruled out entirely To avoid the risks thereof of damage to persons or property being incurred or of any other direct or indirect damages customers must provide for ade quate and comprehensive saf
8. dried fruits peat seeds dried plants Typical applications for medium hard materials Animal feed salts pellets coal porcelain clay spices gypsum drugs pot ash tablets slag minerals ash stone and earth bauxite limestone dried clay etc synthetic resins pyrite cement clinker coke ores refractory ma terials 1 4 2 Method of operation The comminution in the cross beater mill takes place through impact ing colliding and shearing effects After introduction into the filling funnel the material enters the grinding chamber where the com minution process occurs between the cross beater grinding insert and bottom sieve As soon as the material has reached the corresponding final fine ness it passes through the bottom sieve into the collecting vessel A back draft of the air flow generated by the rotating cross beater is prevented and an acceleration of the material throughput is partially achieved with the use of a textile filter hose between the cross beater mill and the collecting vessel This ensures a gentle grinding process Page 6 PULVERISETTE 16 1 5 Technical data 1 6 __ FRITSCH Dimensions pulverisette 16 approx 560x420x445mm height x width x depth pulverisette 16 with base frame approx 1183x560x700mm height x width x depth Weight pulverisette 16 net approx 36 kg with base frame net approx 58 kg Operating noise Noise measurement according to
9. genile grinding process e Slide filter hose E over the flange and at the same time hold the clamping clip at an angle e Clamp on seal E1 e Hang in the collecting vessel F e Clamp on seals F1 lf the collecting vessel is installed without filter hose you can expect dust to escape from the filling funnel D Adding material for grinding The maximum grain size should not exceed 20 mm Add grinding material slowly into the filling funnel D see im age A rebound blocker in the filling funnel prevents the grinding material from being thrown back out Page 18 PULVERISETTE 16 FRITSCH os 4 7 Readjusting the impact gap From time to time the gap between the grinding insert and the impact plates of the cross beater should be inspected See image e Pull the power plug e Open the mill housing e Check the gap between the grinding insert ME and the impact plate PP with a feeler gauge desired value 1mm whereby the gap to the bottom sieve may not be lt 1mm Attention The gap between grinding insert and impact plate may by no means exceed 2 mm since this can cause damages to the instrument e Adjust the gap between the grinding insert and impact plate if neces sary e Screw the impact plates tight with a hex key M5 5 Cleaning The cross beater mill can be cleaned while switched off using brushes small brushes and possibly vacuumed with an industrial vacu
10. or throw the Electronic and mechanical oulverisette 16 during transport Components can be damaged Temperature fluctua In event of temperature fluctua Electronic components can be tions tions protect the pulverisette 16 damaged from condensation Scope of delivery In event of incomplete delivery Complaints registered later than and or transport damages you this can no longer be accepted must immediately notify the ship under some circumstances per and Fritsch GmbH within 24h Ambient temperature Falling below 5 C Electronic and mechanical Exceeding 40 C components can be damaged Performance data changes to an unknown extent Humidity Exceeding of 80 at Electronic and mechanical temperatures up to 31 C components can be damaged Performance data changes to an unknown extent Electrical connection Power network does not match Electronic components can be the values on the type plate damaged Before starting up the device for With an incorrect rotation direc the first time the rotation direction tion the grinding performance must be checked see the direc is insufficient and mechanical tional arrow on the motor components may be damaged Page 10 PULVERISETTE 16 __ FRITSCH Process Action Dangers S Opening and closing Only close the door when the con Mechanical components and of the mill housing tact surfaces are absolutely free of the seal can be damag
11. 6 from to the mains pressed pulverisette 16 is switched on O pressed pulverisette 16 is switched off Disconnects and connects the pulverisette 16 Power switch from to the mains Main switch with ON OFF button with knob ON pulverisette 16 is switched on OFF pulverisette 16 is switched off Door seal hand wheel Opens and closes the door of the pulverisette only with 16 comfort places tension on the door seal PULVERISET Pressed and rotated right closes the door TE 16 com Pressed and rotated left opens the door fort A Receives the grinding material with a maximum oe grain size of 20 mm not intended for storage of a Filling funnel Ni grinding material reserve at door Reliably prevents backspray of the grinding mate rial Prevents a back draft from the air pressure gen E Filter hose w o illustration erated by the rotating cross beater thereby ac celerating the material throughput F OE w o illustration Receives the ground material vessel 5 m Release level for the motor brake Pushing back releases the motor brake allowing manual turning of the cross beater for cleaning Prevents damage to mechanical and electrical components during transport Page 16 PULVERISETTE 16 4 3 FRITSCH os Opening and closing the mill housing Only open the pulverisette 16 while it is switche
12. DIN 45635 31 01 KL3 The noise values are also influenced by the properties of the ma terial being ground Example Noise level Lwa 95dB A Workplace emissions value Lpaeq 86qB A Input material Quartz pebbles grain size lt 3 mm Filling level of the grinding chamber Input quantity until rated motor power was reached Drive 1 and 3 phase alternating current motor with brake Rotation speed 2850 rpm Rated power 1100 watts Input grain size Max 20 mm Collecting vessel volume 5 000 ml or 30 000 ml Protection class IP 54 Materials and composition of stainless steel Shortname X5 CrNi 189 77 325 18 000 02 500 02 000 00 070 P 00 045 00 030 Page 7 a a SS S 01 000 SS en Ooo PULVERISETTE 16 __ FRITSCH Filling funnel and housing of aluminium Material no Short name Composition G AI Si 10 Mg Al 87 300 i 11 000 00 500 00 500 00 400 Ti 00 150 00 100 00 050 f cast Iron Gadde ey Cc 5 Grinding insert Short name Composition O 03 650 03 650 Fe C Si S Cross beater of tempered cast iron Material no Short name GTW 38 Composition Fe o C Si Composition _ o o Si o M o P 8 S Impact plates of special steel Material no 2080 Short name 210 Cr 12 Composition 84 890 12 000 02 200 00 450 00 400 00 030 00 030
13. FRITSCH Operating Instructions Translation of the original FRITSCH S S Seer Fritsch GmbH Milling and Sizing Industriestrasse 8 D 55743 Idar Oberstein Phone 49 0 6784 70 0 Fax 49 0 6784 70 11 Email info fritsch de Internet http www fritsch de Fritsch GmbH has been certified by the TUV Zertifizierungsgemeinschaft e V Certificat registration number 71 100 J 596 TOA TR GERGEMEINSCHAFT FUN AKKREDITIE RUNG GERMAN ASSOCIATION FOR ACCREDITATION GMBH TGA ZM 05 08 00 It was verified through an audit that Fritsch GmbH satisfies the requirements of DIN EN ISO 9001 2008 The enclosed declaration of conformity calls the directives which the PULVERISETTE 16 corresponds to This permitts us to mark the instrument with the CE Sign Device number 16 300x 00 Applies as of serial number 101 Edition 12 2000 Index 003 PULVERISETTE 16 _ FRITSCH Table of contents Page 1 General lntroduction cage e te tence copia ee pege see ee eee cee eee ceysacassbarceneeteue 3 1 1 Notes about the operating instructions ccccesceeseeeeceeeeeeneeeeesaeeeeseneeeneaes 3 1 2 Warming LS CO eee EE E ot aneee arenas seeenesencnaseuancoanaraserante 4 1 3 Explanation of the symbols used on the device and in the operating INSTIUCTIONS ccccccc cece ececececeeeceeeceeeceeecaeeseeeceeesauesauecaeesaeeseeseuesueseueteeeseeesaess 5 1 4 Brief description Of the GEVICE cccceeccccssecece
14. be monitored by Fritsch GmbH Improper execution of the installation can lead to property damage and as a result also place people at risk Ac cordingly we accept no responsibility or liability for losses damages or ex penses resulting from or in any way connected with defective installation and improper operation as well as from incorrect utilisation and mainte nance Page 22
15. d off Press the button 0 on the power switch A or turn to the OFF setting see image Press the hand wheel B1 and turn to the left The hand wheel snaps into the final position Close in reverse order Page 17 PULVERISETTE 16 4 4 4 9 4 6 o FRITSCH ee 7 Inserting the bottom sieve Bottom sieves BS of stainless steel with Conidur or round perforation are available as accessories See image Conidur 0 12 0 2 0 25 0 5 0 75 1 1 5 2 mm Round hole 3 4 5 6 8 10 mm e Stop the pulverisette 16 e Open the mill housing e Insert the bottom sieve BS e Set the impact gap between the grinding insert and cross beater to 1mm with a bottom sieve to cross beater spac ing of not lt 1 mm e Close mill housing e Make certain that a collecting vessel is in place e Start the pulverisette 16 Important Never operate the device without a bottom sieve inserted Risk of injury through possible insertion of fingers from below Filter hose and collecting vessel Through the use of a textile filter hose between the pulver isette 16 and the collecting vessel the airflow generated by the rotating cross beater is guided away and a back draft is prevented In addition it accelerates the material throughput and ensures a
16. eceeceeeeesseseeceeeessaeeessaeeeesaaes 6 1 4 1 FEIOS Ol AO ONG AU OMA seere erp ENE EEE Eris 6 1 4 2 Meihod f Operation seroren sonscuce dace aee EE a bons dnaebenesnastewsdodsteeaserstesecex 6 1 5 TOCCA a nen ee eee E eee eee 7 1 6 Materials and COMPOSITION cccccseeccceeeeceeeeceeeeceeeeeseeeeseeeeseaeeseueessueeesanees 7 2 Operating safety aiiacetia ces tee rete watt ce eee ooece see atsear co tenee anes eceeconces anaes 9 2 1 General Safety INStrUCTIONS cccccceecceceeeeceeceeeeeeceeeeeseeeseeseeaeeeesaeeeessaaaes 9 2 2 SJ 9 2 0 keene ee eee ee ee ee 9 2 3 FOU CUIN SOS CCS rao nioe EE eE E EE e E 10 2 4 Danger POINKS ccccccceecceeeeceeeceeeeceeeeseeceeeseueceueeseeeeseeesaueeseeeseeeeseeesseeenaes 10 3 SUA AU OV ea iea E AOE E E EEEE 12 3 1 JADAC NAG isos ee rn E E EEE E NEE A 12 3 2 TP FARIS DOM cies te seteonete deta ier sane bik sas be dad ouann tance E AS 12 3 3 S15 10 NEE 12 3 4 Setup ON a laboratory table ce ccceeecccsseeecesseecceeeeseeeeseeeeeeseueeeseeeeessees 12 3 5 Fastening of the pulverisette 16 to the universal SUppoOTt eeee 13 3 6 ECCI Gal COMO CUON eeina E E 14 4 Working with the pulverisette 16 1scssscconsscensscennesensesensesensnsenensens 15 4 1 Operating elements and operation cccccceeeceeceeeeceeceeeeeeseeeeeeeseeeeeeaas 15 4 2 Operating elements and their fUNCTION cccecceeseeeeeeseeeeeeeseeeeeeeaeeeeeens
17. ed grinding material and other con taminants Do not open pulverisette 16 In the grinding of toxic or oth while the motor is running erwise harmful substances there is a risk of inhalation of dusts that are harmful to health Do not open the pulverisette 16 Risk of injury from the unbraked and release the motor brake at the cross beater same time Adding material for Add material for grinding slowly Adding too large an amount can grinding and continuously into the filling bring the funnel oulverisette 16 to a stop and could damage mechanical com ponents During grinding dust sized grind Danger of inhalation of harmful ing material can escape from the dusts filling funnel Use a vacuum hood when working with toxic or other wise harmful materials some grinding materials form ex Risk of explosion plosive mixtures in air Check the material properties of your grinding material Cleaning Pull the power plug before every Life threatening risk of electric cleaning shock Do not clean with flowing water Life threatening risk of electric shock Page 11 PULVERISETTE 16 3 2 3 3 3 4 _ FRITSCH Installation Unpacking Pull out the nails with which the shell is fastened to the transport pallet The shell is the wooden box that is situated over the transport pallet Lift the shell off the transport pallet Compare the contents of the delivery with y
18. ety measures whilst working with the product Fritsch GmbH expressly disclaims every explicit or implied contractual or arising from improper handling or a fixed contractual statutorial or other li ability warranty or other obligation in respect of compensation obligations Under no circumstances shall Fritsch GmbH accept liability resp are you entitled to compensation for any special direct indirect incidental or con sequential damages including but not limited to lost profits lost savings lost revenues or economic losses of any kind or for compensation obligations towards third parties for downtime goodwill damage to or replacement of equipment and property for the costs or restoration of materials or goods in connection with the product or the utilisation of our products for other dam age or personal injury including death or the like In so far as the law or ad judications require a mandatory liability the above disclaimer is to be con sidered as limited A liability for negligence is excluded in every case No explicit implied or other rights of usage are granted for patents trade marks or other intellectual property rights Likewise we assume no responsi bility for patent infringements or violations of the rights of third parties arising from the use of this product Both adherence with these operating instructions and the conditions and methods of installation operation usage and maintenance of the product cannot
19. ill to the power network using the supplied con nector cable The supplied power cable does not have a plug since the type of plug de pends on the setup location and the respective national regulations External fuse protection must be provided during connection of the power cable to the mains in accordance with the regulations of the setup location DANGER Power Supply Voltage The connector cable may only be altered by a trained expert Direction of rotation of the drive motor Viewed from the drive side the 3 phase AC motor should rotate anticlock wise Viewed from the front looking at the cross beater mill anticlockwise viewed from the rear clockwise The single phase AC motor is factory set to rotate anticlockwise See e DIN VDE 0530 part 8 Terminal marking and direction of rotation e DIN VDE 0530 Teil 7 EN 60 934 7 Type codes The direction of rotation of the 3 phase motor can be changes by swaping two of the leads L1 L2 and L3 either at the motor terminals or in the plug The direction of rotation may only be changed by a trained electrician Page 14 PULVERISETTE 16 __ FRITSCH 4 Working with the pulverisette 16 4 1 Operating elements and operation Graphical view of the operating elements Page 15 PULVERISETTE 16 _ FRITSCH a 4 2 Operating elements and their function Item Element___ Symbol___ Function Disconnects and connects the pulverisette 1
20. ne should be operated under a hood During comminution of oxidisable substances e g metals or coal there exists a danger of self ignition dust explosion if the portion of fine material exceeds a specific percentage The cross beater mill is not designed with explosion protection and is not suitable for grinding of explosive materials These operating instructions do not contain any repair instructions Re pairs may only be performed by Fritsch GmbH or authorised service technicians Operators The cross beater mill may only be operated by authorised persons and maintained and repaired by trained experts People who are under the influence of health impairments medications drugs alcohol or excess fatigue may not operate the cross beater mill Page 9 PULVERISETTE 16 FRITSCH 2 3 Protective devices i e Protective devices should be used for the intended purpose and must not be made unserviceable or removed e All protective devices must be regularly inspected for completeness and proper function See sections 6 Maintenance and 7 Required inspec tions 2 4 Danger points Process Dangers Safety Damages and injuries resulting All forms of claims for damages from failure to follow the safety in are excluded structions Packaging Please keep the packaging for the A complaint and return in insuf duration of the warranty period ficient packaging can put your warranty claims at risk Transport Do not jolt shake
21. our order Transport Transport with a forklift or elevating truck while on the trans port pallet e Use the ring bolt H for transport of the cross beater mill Do not stand under the transport pallet Setup e Lift the cross beater mill off the transport pallet Observe the accident prevention guidelines VBG 8 VBG 9a and VBG 9 Set up the cross beater mill horizontally on a level and stable indoor surface It is not necessary to fasten the device in place Operation of the cross beater mill while it is on the transport pallet is not permitted e Ensure easy access to the cross beater mill The ambient temperature must range from 5 40 C The max humidity up to 31 C is 80 and declines linearly to 50 at 40 g The minimum elevation for setup and use of the device is 200 m below sea level Setup on a laboratory table You can also mount the cross beater mill onto your labo ratory table Measure the laboratory table thickness Use screws with a max diameter of 8 mm and a length of the laboratory table thickness plus 25 mm Place the cross beater mill including collecting ves sel on the table Mark the hole locations onto the table using the ex isting holes on the motor of the cross beater mill The spacing from the holes to the front edge of the table must allow sufficient space for installation and removal of the collecting vessel and the filter hose
22. sulting from improper packag ing non Fritsch packaging 9 Disclaimer Before using this product these operating instructions are to be carefully read and be understood Use of the product requires expertise and it is to be carried out only by commercial users The product may be used exclusively for the applications outlined in these instructions and within the scope of the regulations set out in these operating instructions and it shall subject to regular maintenance In the event of infringements of these instructions and or improper use or maintenance the customer assumes full liability for the functionality of the product and for such damage or injury as may occur as a result of breaching these obligations The content of these operating instructions is subject as a whole to copyright protection This operating manual and its content may not in any form in whole or in part be reproduced further distributed or saved without the prior written consent of Fritsch GmbH These operating instructions have been compiled to the best of our knowl edge and belief and checked for relevance at the time of printing FRITSCH GMBH does not accept any warranty or guarantee for the accuracy or com pleteness of the content in these operating instructions including but not limited to the tacit warranties of merchantability and suitability for a particular purpose unless applicable laws or adjudications prescribe a liability FRITSCH
23. um cleaner or blown off with compressed air Do not allow any liquids to flow into the device To clean the grinding chamber in the cross beater mill the motor brake can be released with lever G The cross beater is easy to turn making cleaning sim pler The protection class of the cross beater mill is IP54 Page 19 PULVERISETTE 16 FRITSCH Maintenance Before the start of maintenance work pull the power plug and se cure the device against accidental reactivation Warn about maintenance work with a sign Only have maintenance work performed by experts Put safety devices back into operation after maintenance and repair work The cross beater mill requires almost entirely no maintenance From time to time the gap between the grinding insert and the impact plates of the cross beater should be inspected Procedure e Pull the power plug e Open the mill housing e Check the gap between the grinding insert ME and the impact plate PP with a feeler gauge desired value 1 mm whereby the gap to the bottom sieve may not be lt 1mm Attention The gap between grinding insert and impact plate may by no means exceed 2 mm since this can cause damages to the in strument e Adjust the gap between the grinding insert and impact plate if necessary Required inspections Before the start of repair work pull the power plug and secure the device against accidental reactivation
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