Service Instructions for the SLR Laboratory Stirrer
Contents
1. seeeeeeeeeeees 29 7 Error diagnose on the SLR type Laboratory Stirrer 29 fal No LCD indication visiblej ccc pee eho heehee beeen 29 7 5 Device is not heating ee sae ss ae as a es ace act cc ate cache tea cash atencattateceastatencistateneastateneteees 30 28 DEVICE 1S NOLS UPTO x f2e feed cece eek ech eh i etal eset athe tata al aca E EE Eada ie 30 8 1 Maintenance intervalS saa Ge ee eo a a aa a a ae a 31 9 Ex works gauging SLR Laboratory Stirrer eeen 31 9 1 ETN A ac ee e bh a a Nd ak Nad a A A EE E A 31 9 2 Start of Calibrations seercecs ceerees cen lech ceee cess cacy cee sien cos ceete sch ad eek deat et Saat lat eet at cae at dea NN ee 31 923 Setting the Zero Pointes ereenn eener REER EER eeaeee adena edendada edit 32 9 4 Setting Ihe SIOPe wi cccse ee eee ee 32 9 5 Storing the values in the EEPROM seiecc sects ceteet net Seeds aetheel ted eed eet eed ed eens See Senseo 32 10 Errormessage S schtick eek ened hal nt ae it a oh ae kh hd kas ea celal ea et Ned be 32 SLR Service eng doc 18 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas General way of proceeding e The following applies in principle Outside SCHOTT Ger te only complete modules PCBs driving units etc will be replaced Repair of PCBs is not admissible and will result in the loss of any warranty claims e For this reason no wiring documents of the PCBs equipped in SMD technology will be made2. 8 Required service work maintenance intervals 8 1 Maintenance intervals Normal operation The laboratory stirrer does not contain any parts requiring regular service Prior to connecting the device to mains please check to see that the mains cable is not damaged 8 2 Cleaning Clean the laboratory stirrer using a damp cloth and a normal household detergent The bottom and rear side of the stirrer have to be dry treated In no case must any liquid penetrate into the laboratory stirrer 9 Ex works gauging SLR Laboratory Stirrer 9 1 General The calibration process of the temperature display of the stirrer as described here will eliminate any component related errors in the temperature measurement This work is not required for various PT 1000 sensors but only with regard to the electric components The internal resolution of the AD transducer is 8 bits 256 counts values Calibration is done using a PT 1000 simulator Values with a negative sign will not be shown on the display but manifest themselves in a numeric range of gt 400 counts The temperature is calculated according to the following formula Transducer 100 Temp Zero point Slope 9 2 Start of calibration To begin the stirrer has to be separated from mains Calibration is started by shorting the PT 1000 input on the stirrer followed by mains ON After the display of all nothing and the program version the E2 or E3 err
3. available e For replacement purposes authorized service providers should always have spare boards and spare modules on stock e Defective PCBs should be sent by the service agencies to SCHOTT Gerate for repair to safeguard warranty claims View of the device SLR front view SLR rear view SLR Service eng doc 19 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas 1 Safety information The SLR Laboratory Stirrer corresponds to protection class It has been built and tested according to DIN EN 61 010 Part 1 Protective Arrangements for electronic measurement instruments and has left our plant in perfect condition concerning safety regulations To maintain this condition and to ensure safe operation the user has to observe the instructions and warning notes which are included in this Service Instructions Development and protection is done within a system which meets the requirements laid down in the DIN EN ISO 9001 standard For reasons of safety the SLR Laboratory Stirrer must only be opened by authorised persons this means for instance that work on electrical equipment must only be performed by qualified specialists A In the case of non observance of these provisions the SLR Laboratory Stirrer may constitute a danger electrical accidents or fire hazard Moreover in the case of unauthorised intervention in the SLR Laboratory Stirrer as well as in the case of negligently or deliberately caused damage
4. the warranty will become void A Prior to plugging the mains plug on it has to be ensured that the operating voltage of the SLR Laboratory Stirrer matches that of the mains voltage The operating voltage is indicated on the specification plate Non observance of this provision may result in damage to the SLR Laboratory Stirrer in personal injury or damage to property Any change of the operating voltage by service agencies is neither possible nor admitted If it has to be assumed that safe operation is impossible the SLR Laboratory Stirrer concerned has to be put out of operation and secured against inadvertent operation In this case please switch off the laboratory stirrer pull the plug of the mains cable out of the mains socket and remove the laboratory stirrer from the place of work Examples for the assumption that a safe operation is no longer possible include gt the package is damaged the laboratory stirrer shows visible damage gt the laboratory stirrer does not function properly gt liquid has penetrated into the casing The SLR laboratory Stirrer must not be stored or operated in humid rooms For safety reasons the laboratory stirrer must only be used for the range of application described in the present operating instructions No experience is available with regard to the use of the laboratory stirrer for other purposes so that it is impossible to predict any specific hazards for this kind of nonconforming use In the c
5. separating the supply lines the radiation heater can now be removed e If the flat blade connectors inside the device should show traces of major over heating or oxidation the cable harness too has to be replaced To install a new radiation heater please proceed in reverse order Please note The proper fit of the non twist feature and the electrical connection elements is to be verified e Please observe the colours of the connection elements Three fastening screws Non twist feature Illustration Radiation heater installed in the casing 5 5 Dismantling the main board e Detach the two control buttons at the front panel of the device by pulling them along their axis of rotation SLR Service eng doc 25 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas Open the device as described in section 5 1 First remove all cable connections leading to the main board power supply sensor line fan supply and the ribbon cable Illustration PCB top view of bottom side Loosen the two fastening nuts using a 10 mm fork wrench Carefully remove the board from the casing To install a new main board please proceed in reverse order Please note The fastening screw must not be tightened with more than 8 Nm 5 6 Dismantling the power pack board Open the device as described in section 5 1 First carefully loosen all electrical connections 5 flat blade plugs Loosen the two cross recessed
6. Service SLR Laboratory Stirrer SCHOTT glass made of ideas Service Instructions for the SLR Laboratory Stirrer Service SLR Laboratory Stirrer SCHOTT glass made of ideas Contents Page Contents Aeee a i Pere NP Pee eee Meee Pelee Meee Per oe PoC ee ot eee Soe em ot er va eT 18 General way of proceeding s 0 csc nate ee Ree Reena e Reena nes 19 1 Safety IMMORMIANOM s t dere accent aout hcl hath teal ec tatl a adel teal clea ks Eh Mc lor 20 2 Hg ee Ue te ig Weneneeer ee ee Bee ee eee wn Bent PEt Meee Bere Bare enn Baer a eee Pee Cen ee et eee re tee eee ane 21 2 1 Required 1OOIS cases ceca ts eeacncdheditach acatacsh Stat acd caaha cab isbacds Lae tabecaatacia daa tdaaaeesaetugeaiens renee 21 2 2 Required measuring and testing means cccceceeeeeeteecneneeeeeneneneeeneneneeenenenscenteneuedenenes 21 223 SCUING VAISS ites cc cndiae decade oibe Greate ree a ae LO eas 21 3 Matef ial ISSO elects ecole tenets etna hed nett oat eat eat atl a seater hati ite sant tar pit St atta ahd Bote 21 4 Description of the exchangeable modules cccccceeceeeeteeee eee ceeeeeeneeeeeeeneneeeeeneneneeenenentene 21 4 1 Logicsmain board nisen ces settee eee ce aes ean E cat tees dla 21 4 2 Powerpack DO Als mdee herent Oakes ieee ei det eee 22 4 3 Connection boards serren tea nte eas ay ao aay aoa saga aaa aaa daadaa ai ai in 22 J A GVO UGA ss te a a leila a a a a ds a a load 22 ALS Radiation NANG nest tiie ior e ua lade e ee e a a aah ol
7. ase of deviations from the intended proper use of the device it is up to the user to evaluate the possible risks A The relevant regulations regarding the handling of the substances used have to be observed the decree of hazardous matters the chemicals act and the rules and information of the chemicals trade It has to be ensured on the side of the user that the persons entrusted with the use of the laboratory stirrer are experts in the handling of the substances used in the environment of the laboratory stirrer or that they are supervised by expert persons respectively During all work with the SLR Laboratory Stirrer Please wear protective glasses A SLR Service eng doc 20 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas 2 Introduction 2 1 Required tools Crosstip screwdriver Philips no 0 Crosstip screwdriver Philips no 1 TORX screwdriver T 10 length 130 mm 5 mm fork wrench 10 mm fork wrench Torque wrench 5 to 25 Ncm range with long socket 10 mm Screwdriver with flat blade Y N Required measuring and testing means Digital multi meter Pt 1000 simulator for checking and aligning the laboratory stirrer temperature range Uy N w Setting values n a 3 Material used The following materials are used to manufacture the laboratory stirrer e Hot plate Glass ceramics e Casing Casing made of die cast aluminium e Bottom plate Anodised steel sheet 4 Description
8. atory Stirrer No LCD indication visible Is the house mains supply functioning properly Yes gt 7 2 Mains connection cable ok Yes gt 7 3 No Replace cable with genuine spare part only Fuses two on the power pack board ok Yes gt 7 4 No Replace fuses all or entire power pack board please refer to Chapter 5 6 Dismantling the power pack board Service eng doc 29 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT 7 4 7 5 7 6 T T 7 8 7 9 7 10 glass made of ideas Operational voltage of the power pack present on the secondary side 5 V and approx 17 V yes Replace entire main board please refer to Chapter 5 5 Dismantling the main board Device is not heating Display visible no Please check items 7 1 to 7 4 Display is present Does the relay click when the highest temperature stage is set from the cold condition Yes Check the radiation heater using an ohmmeter lt 100 Ohm similarly check cable harness to the radiation heater Check fuses on the connection board No gt Connection board or mains board with processor and LCD defective Device is not stirring Display visible No gt Please check items 7 1 to 7 4 Display visible Yes Replace motor or connection board if necessary replace control main board with processor and LCD SLR Service eng doc 30 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas
9. be written to the EEPROM from where they will be read automatically at the next start up of the stirrer The key is to be pressed until the C display disappears 10 Error messages The error messages are shown in the right part of the display in the temperature display Error E1 interruption of the sensor line E2 short of the PT 1000 sensor E3 error in the data memory EEPROM E4 fan defective SCHOTT Gerate GmbH Hattenberstrake 10 55122 Mainz SLR Service eng doc 32 Version 03 04 2001
10. e nade 23 4 6 Digital shatt encoders nennen eeavate a tats at tate a tat at tats ae tate at tate eta eet sd 23 5 Dismantling the individual MOCUIES cece eeen eener eerren erenn rnnr enren nennen 23 elt Opening UNS CASING aoe 0s tes hans i i a a a aiia 24 5 2 Replacing the mains cable necececececenccene dect ees SURO niniin 24 5 3 Dismantling the motor with holding bracket and Mikanit disk neneeeeeeeeeennenenrernrrnnnn 25 5 4 Replacing the radiation NGACR irc inet ee EEEE EEEE EEEE EEEE edie eee ee 25 5 5 Dismantling the main board cece e cece eee ee eee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeenenenenees 25 5 6 Dismantling the power pack board scsccs soceserasecaeensesesenasevasenmacsd as tea pnete shes essneseeneasentcessomsareure 26 5 7 Dismantling the Powerpack board scicsccsssts sector cose sashsncasectsace lind awtpancdl eagsanbleaalunceomareabuenmansheds 27 50 Dismantling the tanze eienn eaaa act ean act Tean acta rete diet elena hil anal Attra ae ed 27 5 9 Rotary buttons with rotary SWICN 3 20020 cle nel ou de ne oi ie oe eid malin nitens 28 9 10 ECD GISSS COV Fennen cation etek ee oes a ale ada 28 5 11 Casing with Glass COV 2 2 3 eek cote eet cence ani cent danke ens cant cenic ene cenecepicened eee Perae ieee doce TEATE EEEE ae 29 5 12 Cable harness of the temperature sensor with 4 mm banana sockets 000ceeeee 29 6 The following modules are available as exchange or spare parts reSp
11. n on the main board Subsequently loosen the two fastening screws and remove the fan e To install the fan please proceed in reverse order Fastening screws Illustration Fan underneath the ribbon cable fan fastening screws SLR Service eng doc 27 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas 5 9 Rotary buttons with rotary switch e Detach the two control buttons at the front panel of the device by pulling them along their axis of rotation e Loosen the fastening screws of the rotary switch using a 10 mm fork wrench e Open the device as described in section 5 1 e Loosen the electrical connection to the rotary switches Unlatch the zero load plug When installing please make sure that the entire black connector is inserted into the zero load plug e To install please proceed in reverse order Shaft encoder with flex board per gt JO F a Zero load plug Illustration Shaft encoder installed 5 10 LCD Glass cover e Remove the main board as described in section 5 6 e Remove the LCD glass cover and remove any glue residues from the casing and the pane e Glue on the new LCD glass cover using the glue provided LCD glass cover Illustration Casing with glass cover SLR Service eng doc 28 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas 5 11 Casing with glass cover Dismantling the mains supply cable harness and the st
12. ng it upwards out of the casing then carefully separate all flat blade connectors from the connection contacts The mains cable has to be replaced as one part Considering that the insulation of the cable is made of a highly heat resistant material please do not use any cable other than the genuine spare cable To re assemble the unit please proceed in reverse order Illustration Mains cable laid in the device detail connection earth conductor SLR Service eng doc 24 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas 5 3 Dismantling the motor with holding bracket and Mikanit disk The motor including the metal holding bracket and the Mikanit disk have to be replaced as one unit Loosen the electrical connection between the motor and the connection PCB Loosen the two fastening screws of the motor holding bracket Remove the motor from the casing To install a new motor including the holding bracket please proceed in reverse order Motor connection Fastening screws on Illutration Top view of bottom side 5 4 Replacing the radiation heater Open the device as described in section 5 1 Remove the motor including the holding plate as described in section 5 2 Loosen the three fastening screws of the three steel springs three Torx T10 To facilitate the disassembly of the radiation heater the non twist feature can be removed as well Loose two cross recessed screws After
13. of the exchangeable modules 4 1 Logics main board Printed board in SMD technology This board accommodates the processor microchip EEPROM module memory for device parameters the LCD module the driver electronics for the stirrer drive the two digital shaft encoders for operation The contact with the power pack is made using a 3 channel connector The connection board is contacted using a 16 channel Quickie plug connector Illustration Main board front and back SLR Service eng doc 21 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas 4 2 Power pack board Conventionally equipped printed circuit board This board carries the transformer the mains unit for generating the secondary voltages 5 Volt and 12 Volt and 2 fuses AA S002 e ta40 C CI E gt m mi CEN A0008 1581 AH Illustration Power pack board front and back 4 3 Connection board This board is used to connect the mains voltage and the stirrer motor Moreover it carries the switching relay for the heating and the primary fuses for the heating circuit Illustration Connection board front and back 4 4 Driving unit Consists of the disc motor motor holding bracket Mikanit disk for thermal insulation magnetic holder with yoke plate and 2 magnets Illustration Driving unit complete top view driving unit complete bottom view SLR Service eng doc 22 Version 03 04 2001 Service SLR Laborator
14. or message will appear on the display Now you have 20 seconds to press the stirrer on key left control button The left display stirrer will show the letter C and a random number on the heating display This figure is of no importance at this point If no values are yet stored in the EEPROM the E3 error message will appear Subsequently remove the short from the sensor input then connect the PT 1000 simulator As a rule a negative temperature setting on the Pt 1000 simulator will be sufficient start the calibration process SLR Service eng doc 31 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas 9 3 Setting the zero point Set 0 C on the Pt 1000 simulator Use the left rotary button to set the temperature display to a value of 000 To do so slowly rotate the button to the right in the case of numeric values gt 400 and to the left with numeric values between 1 and 50 9 4 Setting the slope The slope is set with temperature values gt 150 C First set the command value on the Pt 1000 simulator subsequently use the right rotary button to set the set value in the temperature display 9 5 Storing the values in the EEPROM The temperature values as displayed should be verified by changing the command values on the Pt 1000 simulator In the case of deviations greater than 2 C the calibration has to be corrected If you press the left control button heating on the data will
15. rain relief as described in section 5 2 Dismantling the motor as described in section 5 3 Dismantling the connection board as described in section 5 7 Dismantling the radiation heater as described in section 5 4 Dismantling the radiation heater as described in section 5 6 Dismantling the fan as described in section 5 8 Dismantling the main board as described in section in 5 5 Dismantling the cable harness and the 4 mm sockets of the temperature sensor as described in section 5 13 Installation of all components in reverse order 5 12 Cable harness of the temperature sensor with 4 mm banana sockets O 7 2 7 3 SLR Open the device as described in section 5 1 Remove the electrical connections de solder on the main board Remove the banana sockets on the backside of the casing using an 8 mm fork wrench To install a new cable harness please proceed in reverse order For reasons of electromagnetic interference the wires have to be twisted inside the device The following modules are available as exchange or spare parts resp Radiation heater Mains supply cable harness Control main board with processor and LCD Connection board Motor with holder magnetic holder yoke plate magnets and Mikanit disc Fan Rotary buttons and rotary switch LCD glass cover Rotary buttons and rotary switch Bottom metal sheet Cable harness of the temperature sensor with 4 mm banana sockets Error diagnose on the SLR type Labor
16. screws M3 holding the power pack board Carefully pull the power pack board upwards to remove it from the casing To install a new power pack board please proceed in reverse order Please note During installation please be sure that the screws are pointing into the heating space in order to ensure a required minimum distance to the live connections Illustration Power pack board SLR Service eng doc 26 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas 5 7 Dismantling the power pack board Open the device as described in section 5 1 Loosen all electrical connections Cable to the motor Pull off the ribbon cable located on the main control board Four flat blade sleeves Remove the mechanical connection one M 2 5 cross recessed screw M 2 5 split washer M 5 nut of the board Remove the connection board from the casing Flat blade connector M 2 5 fastening screw Illustration Fastening of the connection board 5 8 Dismantling the fan e To dissipate the excess heat of the radiation heater occurring in the device a fan is provided inside the laboratory stirrer If this fan fails no operation of the device is possible Open the device as described in section 5 1 Remove the motor as described in section 5 2 Remove the radiation heater as described in section 5 4 Loosen the connection of the ribbon cable by opening the latch Loosen the electrical connection of the fa
17. y Stirrer SCHOTT glass made of ideas 4 5 Radiation heater Radiation heater with short rod limiter and open metal case for magnetic coupling of the stirring bar Illustration Radiation heater top and bottom view 4 6 Digital shaft encoders The digital shaft encoders are used to set the heating stage and the stirring speed In addition to the generation of pulses there is an on off keying function Illustration Digital shaft encoders top and bottom view with flexible PCB installed rotary button 5 Dismantling the individual modules To be able to work on the devices please separate the device from mains by unplugging the mains plug SLR Service eng doc 23 Version 03 04 2001 Service SLR Laboratory Stirrer SCHOTT glass made of ideas 5 1 Opening the casing Caution Prior to opening the device please unplug the mains plug Place the device on a soft surface with the glass ceramics down Loosen the five Torx screws at the bottom of the device using a Torx screwdriver 10 type Caution The screws are earthing elements therefore they must be fastened only with the self shaping screws provided Bottom sheet sheet screws Illustration SLR Laboratory Stirrer bottom 5 2 Replacing the mains cable Open the device as described in section 5 1 Loosen the protective conductor connection to the casing The screw is secured by an indented ring Cut the cable fastener open Remove the strain relief by pulli
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