"service manual"
Contents
1. 8 1 Pkt Plain Tubes 9 Rotor removal tool 10 Emergency Release Key 11 1 Tray Cristaseal Check that specifications on the rating plate correspond to supply voltage The rating plate is located on base of centrifuge Retain packaging material for further use should the need arise to return for repair Power cord connect only to an approved power source such as a 3 wire grounded receptacle Where a 2 wire receptacle is encountered have it replaced with a properly grounded 3 wire receptacle in accordance with the national electrical code Do not under any circumstances remove the grounded prong from the power cord Brown Live Blue Neutral Green yellow Earth WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK 3 INSTRUCTIONS FOR USE cont d TINER DOUN _ SUITCH OFF SWITCH 3 1 Mains Supply The mains input socket assembly is at the rear of the centrifuge and comprises a mains input socket an illuminated on off switch and fuses for both live and neutral lines The fuse rating is 3 15 POWER LEAD SS 0 WRITTEN BY D GROVE DATE ISSUE PAGE APPROVED BY J DINNING 1 7 97 Rh 32 3 3 3 4 SERVICE MANUAL MICRO CENTRIFUGE MK IV 3 INSTRUCTIONS FOR USE cont d ROTOR ASSEMBLY Unlock lid and open it to reveal the rotor drive hub location Assemble rotor on drive hub and align the two screw holes2. PAGE APPROVED BY J DINNING 1 7 97 SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE 2 MOTOR UNIT To inspect for wear or replace the motor brushes remove the motor unit complete with its mounting bracket Remove black cover from the control and locate the motor harness plug Withdraw the plug from the PCB socket Unscrew the 5 nut and remove earth wire and washer lead leading from bracket to the earth terminal Unscrew and remove the four 5 nuts and shakeproof washers from the motor bracket The motor unit can now be lifted clear of its mounts taking care to avoid the imbalance microswitch MOTOR BRUSH REPLACEMENT At the bottom of the motor remove brush tail holder screw and lift spring to one side Extract carbon brush or repeat other side of motor Excess carbon dust should be removed from motor Caution If low pressure air line is used make sure you are wearing a suitable face mask and goggles When replacing or fitting new carbon brushes care should be taken to ensure that they are a free fit in their holders and the curvature of the brush matches that of the armature Refit brush tail and holder screw then replace spring on top of carbon brush Note New brushes should be given two ten minute runs to ensure bedding in of carbon brushes BRUSH CARBON TAIL BRUSH SPRING LDER DATE ISSUE REVISION SERVICE MANUAL MICRO CENTRIFUGE MK IV SERVICE MOTOR UNIT Con
3. 35 Stop Under normal circumstances the centrifuge will automatically stop at the end of the timed run and indicate that the lid can be opened If for any reason it is necessary to terminate the run during its timed sequence pressing the switch marked O will immediately turn off the motor and initiate the braking sequence During the braking sequence the display will show OFF SWITCH WRITTEN BY D GROVE DATE ISSUE REVISION 3 6 SERVICE MANUAL MICRO CENTRIFUGE MK IV 3 INSTRUCTIONS FOR USE cont d TUBE SAMPLE PREPARATION a b c Capillary tubes used for centrifugation must conform to British Standard BS 4316 to withstand the forces of centrifugation and give accurate results Please ensure that the tubes to be used are marked the packaging BS4316 or equivalent standard Take blood into tube by capillary action to within 15mm from the end Use HEPARINISED tubes for direct capillary blood and PLAIN tubes for venous blood rendered incoagulable Avoid air bubbles in the capillary tube and use the guide on the edge of the Cristaseal tray to check the correct blood volume i e 40 60mm of blood Seal the unfilled end of the tube with CRISTASEAL holding the tube at a 90 angle to the Cristaseal tray Push the tube to the bottom of the tray and then twist and remove the sealed tube PUSH TUBE TO BOTTON OF CRISTASEAL TRAY TUIST AND REMOVE SEALED TUBE pate 19508 REVIS
4. Insert the two fixing screws provided tighten them down evenly spin rotor to check concentricity Check that the rim gasket is located on inner rotor rim Move centrifuge to a convenient power source ROTOR LID ROTOR SCREUS H ROTOR 24 PLACE ROTOR LOADED Time Setting The centrifuge running time is set on the front panel using the blue switches on either side of the central digital display right hand switch increases the time and the left hand one decreases it There are 43 time steps of 5 10 15 20 25 30 35 40 45 50 55 and 60 seconds then half minute steps up to 15 minutes and finally 20 25 and 30 minutes The steps can be incremented either by individual pushes of the switch or else by holding the switch down and allowing the control system to count up or down When the centrifuge is set running the time setting will count down in seconds to zero when the motor will turn off and rotor braking automatically applied TINER TINER DOUN UP MINS D SUITCH SUITCH Run The green switch marked I starts the centrifuge run sequence in1 to 5 seconds once the lid is closed and the time is set The running indicator window is then illuminated to show that the sequence has started RUNNING SWITCH 1 MOTOR INDICATOR WRITTEN BY D GROVE DATE ISSUE 5 SERVICE MANUAL MICRO CENTRIFUGE MK 3 INSTRUCTIONS FOR USE cont d
5. BY D GROVE DATE ISSUE REVISION SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE 3 FILTER MAINS AND CONTROL PCB TO REMOVE FILTER MAINS PCB To remove bowl see the section on Removal of Bowl Remove motor unit see section on Motor Unit The PCBs can be taken out with motor unit in place i Remove black PCB covers off Control and Mains Filter PCB Disconnect plugs from control PCB To remove Mains Filter board On top of nylon stand off there is a little lock tab This needs to be pushed in Part of the board is detached one at a time until all stand offs release the PCB Lift clear PCB To replace Mains Filter board Place PCB over the stand off and click into place MAINS PCB MAINS PCB PUSHED OVER STAND OFFS To remove Control board The Control board is held down by four nylok nuts Unscrew and lift clear Note The Control board sits on nylon spacer these are to be kept To replace Control board Make sure the nylon spacers are on the four studs replace PCB board with the connectors at the bottom and screw on the nylok nuts NYLOK NUTS PCB BOARD m NYLON SPACER WRITTEN BY D GROVE DATE ISSUE 5 APpROVED 79 o 2 SERVICE MANUAL MICRO CENTRIFUGE MK IV SERVICE MAINS INPUT Remove black cover over mains input Peel off the Velro on the inside from each side of the input socket Disconnect plug from Mains Filter PC
6. ROTOR ua 24 PLACE ROTOR LOADED 9 Fig 1 WRITTEN BY D GROVE DATE ISSUE REVISION SERVICE MANUAL MICRO CENTRIFUGE MK IV INTRODUCTION METHOD Whole blood samples are drawn either directly into a capillary tube containing a suitable anti coagulant such as heparin or into a plain capillary tube from a heparinised sample The measurement is usually made on peripheral venous blood so that the venous PCV is determined The capillary tubes are now placed in a micro haematocrit centrifuge and the samples spun for the required time This depends upon the G force applied but in general a micro haematocit centrifuge will spin samples for about five minutes at 12 000g and obtain a constant PCV After spinning the PCV levels can be measured either in place using a rotary reader or by removing the tubes and using a hand held reader Haematocrit Reading bottom red cells reading top red cells Reading bottom red cell reading at plasma meniscus Blooa _ _ _ Cristaseal Tube seal Blood Filled Capillary tube before Centrifugation k __ Blo Sanple Se EE ES Sa eee Plasma Packed red cells Capillary Tube After Centrifugation Red blood cells erythrocytes of the peripheral blood of man are non nucleated cells which have a characteristic biconcave disc shape They consist of a concentrated solution of haemoglobin contained in a thin lipo
7. protein membrane Their main function is the transportation of oxygen The term haematocrit is used to express the volume of erythrocytes 1001 of blood it indicates the relative proportions of plasma and red cells and the word is often used to mean the packed cell volume PCV During operation the rotor turns at high speed Approx 12 000 rpm and this rotation generates CENTRIFUGAL FIELD which can be used to makes separations A liquid containing suspended material of a greater density than the liquid will under the force of gravity allow the suspended material to sediment at the bottom of the tube If the force is increased to many times that of gravity the sedimentation process is accelerated with larger and more dense particles being deposited first in pellet Less dense and smaller particles will follow leaving the liquid above the deposited material which is known as supernatant WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV 2 INSTALLATION INSTALLATION 2 1 2 2 2 3 2 4 2 5 Inspect packaging for damage If you suspect damage to the unit notify the supplier or manufacturer immediately quoting model and serial number Unpack the machine and check the parts against the following list 1 Instruction Manual 2 Centrifuge 220 240 volt 3 24 Place Haematocrit Rotor amp lid 4 Rotor Screws 5 Power cord 6 Fuse pack 7 1 Pkt Heparinised
8. 14 The motor brushes have worn down below serviceable limits and should be investigated only by qualified personnel The motors used in these units are designed for enhanced performance with long brush life 4 15 LID FAILURE Whilst the unit is running if the lid is lifted the display will show LID for two seconds then will go into stop mode and it will open normally WRITTEN BY D GROVE DATE ISSUE 5 PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV ORDERING INFORMATION CENTRIFUGES EXCLUDING ROTORS 01300 00 STANDARD MICRO HAEMATOCRIT CENTRIFUGE 240 ROTORS 01810 00 MICROTOR 01820 00 CHEMROTOR 01881 00 ROTOR 20 PLACE ACETAL 30 FA 01890 00 ROTOR 8 PLACE ACETAL CLOSED FA 01971 00 ROTOR STANDARD 24 PLACE 01986 00 ROTOR COMBINATION ACCESSORIES 01307 00 INSTRUCTION MANUAL MHC MK IV 01308 00 SERVICE MANUAL MKIV MHC 01502 00 READER 01560 00 ROTOREADER AND MAGNIFIER 01561 00 MAGNIFIER 01562 00 ROTOREADER 01503 00 CRISTASEAL BOX 10 TRAYS 01504 00 RIM SEAL GASKET PKT 20 01971 00 Rotor 01603 00 CAPILLARY TUBES HEPARINISED 75mm BOX 10 X 100 01604 00 CAPILLARY TUBES PLAIN 75mm BOX 10 X 100 01605 00 CAPILLARY TUBES HEPARINISED 75mm BOX 1000 01606 00 CAPILLARY TUBES PLAIN 75mm BOX 1000 01968 00 FUSE 3 15amp Pkt 2off 01989 00 RIM SEAL GASKET PKT 10 01986 00 Rotor 11767 00 BOWL SEAL WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV 6 SPECIF
9. 1982 00 4 11983 00 5 11984 00 6 11985 00 7 12004 00 8 11715 00 9 11935 00 10 01915 00 11 12001 00 12 11963 00 13 11992 00 14 01944 00 15 11994 00 16 16522 00 17 11995 00 18 19023 00 19 11957 00 20 11767 00 21 01971 00 22 11891 00 23 11939 00 WRITTEN BY D GROVE APPROVED BY J DINNING DESCRIPTION Input Socket Mains 240v Hinges Metal Pr Lid Reinforcing strip Lid Inner Catch Pin Lock Pin Solenoid Solenoid M switch Bkt Assembly Moulding Catch Pin Base Feet Rubber Pkt 4 Switch Imbalance Assembly Spacer Brass Imbalance Motor Unit Assembly Avm mounts Pkt 4 PCB Mains Filter Stand off Pkt 6 PCB Control Spacer PCB Pkt 4 Bowl Lid Seal Rotor 24 place Assembly Release Overlay H DATE ISSUE REVISION SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE CONTROL PCB 358 508 358 Total 1 5A RELAY FARNELL 431 382 Total 2 RL2 RL3 7 SEG HEAD10 HDSP 5501 Total 4 DG1 DG2 DG3 DG4 74HCT373 5020 74HCT373 Total 1 IC2 74HCT374 SO20 74FCT373 Total 1 1 4 74HCT374 Total 1 7805 220 7805 Total 1 VR1 87C750 DIL24 3 87C750 Total 1 IC1 BC635 NSC TO92 BC635 NSC Total TRI N F Total 1 TRO BRIDGE BR WO5 W01 Total 2 1 BR2 BU7Z73L TO220 BUZ73L Total 1 Q2 C0805 0805 100N Total 7 C1 C4 C6 C24 C25 C26 C27 1N Total 7 C7 C8 C10 C15 C16 C17 C18 C19 C20 C21 C22 C1206 1206 Total 2 C13 C14 CAP CAPR4 0 1uF 400v Total C23 CAP
10. A 282 2 5 Total 1 R1 512 SIL2 SIL2 Total 4 CN3 CN4 CN5 CN6 SIL3 MET3WAY MET3WAY Total 1 CN7 513 5 N F Total 1 CN2 SILA SILA Total 1 SIL6 MET6WAY MET6WAY Total 1 CN8 TEST_PAD 1 Total 1 1 7113062 TLP3062 Total 1 ISO1 TRIAC TO220 Total 1 01 WRITTEN BY D GROVE DATE ISSUE REVISION PAGE APPROVED BY J DINNING SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE CONTROL PCB LAYOUT 20 1 Jess REIZE 8 g 00 000000 SHE CENTRIFUGE BOARD 51 WRITTEN BY D GROVE DATE ISSUE REVISION PAGE APPROVED BY J DINNING 1 7 97 e SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE PSU CIRCUIT PSU CIRCUIT SHEET 4 5 SME6 1822 572 x z 8 2 lt im DRAWN BY PDS WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE CPU CIRCUIT CPU CIRCUIT go u a ZERO CROSSING SME CENTRIFUGE BOARD SME61222 RHATURE CURRENT 17 12 96 WRITTEN BY D GROVE DATE ISSUE REVISION PAGE 4 NALLINM CN3 1 10 OPEN 5 CN4 21 3 VIBRATION x SWITCH ROB SPARE SWITCH TI SME CENTRIFUGE BOARD SWIT
11. B Unscrew nuts and washers on earth terminal and remove earth wire and cut all cable ties that hold input socket wires Push tabs down that hold the input socket in place then remove NOTE MAKE SURE IT IS PAINT FREE AROUND STUD MS NUT HS SHAKEPROOF Replace input socket Replace earth wire from socket held down with a M5 nut and washer first before any other earths are fitted Plug into Mains Socket and replace cable ties Replace the velro on sides of socket replace cover SERVICE LABEL FUSES 8 3 1544 1 To replace fuses Pull draw out until the draw tilts down Remove old fuses and slide in new fuses and close the draw SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE IMBALANCE SWITCH To remove bowl see the section on Removal of Bowl Remove black PCB cover Disconnect plug from control PCB Remove M3 screws and lift microswitch assembly clear Place into position and secure with M3 screws and washers Connect plug into PCB Adjustment is achieved by bending the roller arm When the motor moves about 3 4mm before the microswitch is actuated then imbalance is correctly set MICRO SUITCH 2UAY TERMINAL PLUG 16 PANHEAD SHAKEPROOF m UASHERS SUITCH ASS BRASS SPACERS CASE BOTTOM ISSUE 5 SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SPARE PARTS Exploded view No Cat No 1 11998 00 2 11986 00 3 1
12. CAPR15D3 100uF 50v Total 1 C5 220uF 25v Total 1 1 2 10uF 16 Total 1 11 WRITTEN BY D GROVE DATE ISSUE REVISION APPROVED BY J DINNING 1 7 97 lA fo fe SERVICE MANUAL MICRO CENTRIFUGE MK IV WRITTEN BY D GROVE APPROVED BY J DINNING 8 SERVICE CONTROL PCB CAP CAPR2D5 1000uF 25v Total 1 C2 FIXINGM4 FIXINGM4 M4 Total 8 FIX1 FIX2 FIX3 FIX4 FIXS FIX6 FIX7 FIX8 FUSE FUSE20MM 1 6A T Total 1 FS1 HC18S 12MHz Total 1 XT1 HEATFIN 5 HEATFIN Total 1 HF1 LED LEDR1 Total 1 LD5 LED BAR 8 DIL16 LED BAR Total 1 LED3 LL4148 MINIMELF 114148 Total 8 D1 D2 D3 D4 05 D6 D7 D8 MOV VDR V MOV Total 1 MV1 NPN_SOT23 SOT23 NPN Total 9 TR1 TR2 TR3 TR4 TR5 TR6 TR7 TR8 TR10 TR11 PUSHBUTTON SWITCH Total 5 SW1 SW2 SW3 SW4 SW5 R FUSE RESASD1 100R 0 5W FUS Total 1 R37 R0805 0805 100 Total 6 R25 R27 R41 R45 R54 R56 10K Total 2 R9 R55 330R Total 23 R2 R3 R4 R19 R20 R21 R23 R24 R26 R28 R29 R30 R31 R32 R33 R34 R35 R36 R39 R40 R44 R49 R52 470K Total 2 R47 R53 47K Total 12 R5 R6 R7 R8 R10 R11 R13 R14 R15 R16 R17 R18 47R Total 1 R22 DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE CONTROL PCB RLY 2PCO RL KEY KEY RELAY Total 1 RL1 R_0 25W RESASD1 100K 0 25W Total 2 R48 R50 0 25 Total 1 R38 N F 0 25 Total 2 R46 R51 R_1W RESA6D15 1R 1W Total 1 R42 R_1W RESA7DA 10R 2 5W Total 1 R43 R_2 5W RESA7D
13. CHES INPUTS SHEET 3 OF S 2 S S SLOdNI SHHO LIAS 8 8 AI AN TVANVW HOIA3HS SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE DISPLAY CIRCUITS SHEET 4 OF 5 6 SEG1_LED 9 SEG2_LED DRAWING SME6 1222 ae amp Ss amp m 904 05 4 4 8 Y 2 2 29 Z 828888 74HCT374 17 12 96 DATE DATE I ISSUE REVISION PAGE APPROVED BY J ING SERVICE MANUAL MICRO CENTRIFUGE MK IV SERVICE MOTOR CONTROL e e 1 2 S S 133 5 2221 93WS 36 2174 1081402 1 35n4J4I31N33 IWS t 1N332 03431147N ABMS13H WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE FILTER BOARD COIL 2 4mH 500W Total 2 IND1 IND2 FIXINGM4 FIXINGM4 M4 Total 12 FIX FIX2 FIX3 FIX4 FIXS FIX6 FIX7 FIX8 FIX9 FIX10 FIX11 FIX12 RESISTOR 0 25W RESAD1 OR Total 3 R1 2 470 Total 1 R4 SIL3 SIL3 Total 2 CN1 CN2 SILA SIL4 Total 1 CN3 TRANSFORMER TX1 12 9 0 9 Total 1 2 11 1UF 2 Total 1 1 2_ CAPR6 4N7
14. ICATION MANUFACTURER MODEL NO CLASSIFICATION SHOCK PROTECTION DEGREE OF MOBILITY MODE OF OPERATION POWER CONSUMPTION FUSES MOTOR TIMER BRAKE SPEED R C F ACCELERATION WEIGHT DIMENSIONS Hawksley amp Sons Ltd Marlborough Road Lancing West Sussex BN15 8TN England Tel 01903 752815 Fax 01903 766050 01300 00 Class 1 Equipment Type B Portable Intermittent 380w 220 240 50Hz 1 amp F2 Mains 3 15 amp Quick Blow High precision A C DC series wound brush gear Class B insulation Specified to BS 5000 rated 220 240v 50Hz Electronic graduated in 5 10 15 20 30 45secs 1 all 30sec intervals up to and including 15 20 25 and 30mins Automatic on completion of timed setting 11 800 RPM with 24 place rotor 13 000 x G with 24 place rotor 0 11 800 RPM in 70 secs with 24 place rotor 8 0Kg nett Less Rotor 262mmW x 235mmH x 272mmD All specifications are accurate at the time of printing and in line with Hawksley s policy of continuous improvement the right to modify the product specifications described is reserved without advance notice WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV 6 SPECIFICATION Cont d SYSTEM BLOCK DIAGRAM SOLENOID DRIVER 4 OFF 7 8 LED DISPLAY PSU CIRCUITS MICROCONTROLLER 836750 AC DC WRITTEN B
15. ION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV 4 INSTRUCTIONS FOR USE 4 d capillary tube is broken leaving broken glass in the Cristaseal the tray must be SAFELY DISPOSED OF For centrifugation place the tube in numbered slot with sealed end pointing outwards Make sure the sealed end is actually touching the rim seal gasket at outer edge of rotor No balancing of capillary tubes is required due to the high precision of the rotor ROTOR SLOT CAPILLARY TUBE SAMPLE CRISTASEAL RIN GASKET NOTE The rim seal gasket should be changed at least once a month or sooner if deterioration is evident f the rotor lid and screw down firmly DO NOT RUN THE CENTRIFUGE WITHOUT ROTOR LID CENTRIFUGE OPERATION g Close centrifuge lid WRITTEN BY D GROVE pare REVISION PAGE SER VICE MANUAL MICRO CENTRIFUGE MK IV 4 INSTRUCTIONS FOR USE cont d 3 7 CENTRIFUGE OPERATION 3 8 Connect the power lead to the input socket and a convenient 220 240volt 50Hz supply and switch on The green power lamp at the rear of the unit will be illuminated POWER LEAD a 3 9 Close the lid and select the desired run time by pressing the blue switches either side of the central digital display Note The motor will take approximately 70 seconds to reach full speed with the 24 place rotor TIMER DOUN _ SWITCH S 3 10 Press the run switch mark
16. MICRO HAEMATOCRIT CENTRIFUGE MK IV 01300 00 SERVICE MANUAL PART NUMBER FOR THIS MANUAL 01308 00 SERVICE MANUAL MICRO CENTRIFUGE MK IV INDEX Section 1 INTRODUCTION 2 INSTALLATION 3 INSTRUCTIONS FOR USE 4 CONDITIONS 5 ORDERING INFORMATION 6 SPECIFICATION 7 MAINTENANCE 8 SERVICE 9 WARRANTY amp SERVICE WRITTEN BY D GROVE APPROVED BY J DINNING Page No 2 3 5 14 15 16 17 18 19 20 21 41 42 DATE ISSUE PAGE pa fp SERVICE MANUAL MICRO CENTRIFUGE MK IV INTRODUCTION This manual contains operating instructions for the following centrifuge Description Power Model No STANDARD MICRO HAEMATOCRIT CENTRIFUGE MKIV 240 volts 01300 00 with 24 place standard rotor INTENDED USE The STANDARD MICRO HAEMATOCRIT CENTRIFUGE is a high speed instrument that permits the quantitive measurement of micro haematocrits with the aid of a separate measuring device or a reading device placed over 24 place rotor with the aid of a magnifier Main components features STANDARD MICRO HAEMATOCRIT CENTRIFUGE MKIV shown in Fig 1 Under the lid it contains a 24 Place standard rotor which holds up to 24 x 75 mm capillary tubes After centrifugation of tubes measurement of micro haematocrits is calculated with the aid of a separate measuring device or a reading device placed over 24 place rotor with the aid of a magnifier ROTOR LID ROTOR SCREUS 222522
17. Y D GROVE DATE ISSUE REVISION PAGE APPROVED BY J DINNING 1 7 97 P gt PLACE WRITTEN BY D GROVE DATE ISSUE REVISION SERVICE MANUAL MICRO CENTRIFUGE MK IV MAINTENANCE LID SEAL Lift bowl and place seal over bowl then slide seal over rim CROSS SECTION OF SEAL FITTING BOUL SLIDE SEAL OVER SEAL BOUL OF a REPLACEMENT OF RIM GASKET The rim gasket has no adhesive Lay strip round the inner rim of rotor The rim gasket ends will overlap push ends outwards till ends meet Ends should meet between any two slots Note Rim gasket is supplied at the required length Do not cut when fitting BOWL CLEANING The bowl may also be cleaned whilst the rotor is removed using the cleaning methods on page 14 f NOTE If it is necessary to remove the bowl to remove contamination removal must be carried out by Qualified technical personal WARNING Switch mains off before removing bowl SERVICE MANUAL MICRO CENTRIFUGE MK IV WARNING Before attempting serving or repair disconnect from power supply Replacements should be made by trained personnel For continued safety Be sure to re connect any ground wires disconnected during servicing To assist with the servicing of centrifuge the Inner Bow should be removed to gain access to the following I Section Page No 1 Removal of Bowl 21 22 2 Motor Unit 23 24 3 Lid lock 25 4 Filter Mains board
18. Y2 Total 2 C2 WRITTEN BY D GROVE DATE ISSUE REVISION PAGE BY a onmane fa Jo SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE FILTER MAINS PCB LAYOUT FIT R3 248 IND4 SME FILTER BOARD Di ISS 2 WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE FILTER BOARD oe 52 28 lt 53 Lu N SME CENTRIFUGE BOARD SME6 10822 DATE DRAWING NO 17 12 96 WRITTEN BY D GROVE DATE ISSUE REVISION APPROVED BY J DINNING 1 7 97 p SERVICE MANUAL MICRO CENTRIFUGE MK IV WARRANTY amp SERVICE WARRANTY This instrument is guaranteed for both parts and labour for a period of 12 months from date of the delivery The manufacturer accepts responsibility for the effect on safety reliability and performance of the instrument only if a Repair and or adjustments are carried out only by person or persons authorized to do so by the manufacturer b The electrical supplies of the building where the instrument is used comply with wiring regulations published by the Institute of Electrical Engineers c The instrument is used in accordance with the instructions for use as detailed in this manual SERVICE With good housekeeping and regular servicing this instrument should give trouble free operation for
19. and Control PCB 26 5 Mains Input assembly 27 6 Imbalance Microswitch 28 7 Spare Parts 29 8 Circuit Diagrams and Components 30 41 1 REMOVAL OF BOWL 1 First ensure the centrifuge is disconnected from the electrical power supply If the lid is locked insert the emergency release key into the small hole found at the top front corner of the left hand side panel and push the solenoid locking pin back Once the locking pin has overcome the magnetic field holding it it will click back to its reset position and allow the lid to be opened PLACE KEY IN HOLE AND PUSH TO RELEASE SOLENOID PIN THEN THE LID CAN BE OPENED DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV SERVICE To remove rotor Unscrew rotor lid by unscrewing the knurled retaining nut in a anticlockwise direction then lift clear I Locate and remove the two fixing screws that secure the rotor to the drive knub ROTOR LID ROTOR SCREUS ROTOR 24 PLACE ROTOR LOADED 9 Using the rotor removal tool carefully withdraw the rotor and store together with its lid and screws in a safe place ROTOR REMOVAL TOOL The bowl can now be lifted to reveal earth wire that is attached to the bowl Unscrew the 5 nut that attaches the earth wire to case remove wire with washer and nut and lift bowl clear 10 REMOVE BOWL 5 NUT AND WASHER WRITTEN BY D GROVE DATE ISSUE
20. e solenoid back Once the locking pin has overcome the magnetic field holding it it will click back into its reset position and allow the lid to be opened This procedure should only be necessary if either the mains supply to the unit fails or else the unit itself fails and blows its mains fuse The mains fuses are found in the mains input assembly at the rear of the unit and should be replaced by 3 15 Amp fuse from the spares pack supplied with the unit Further fuses can be supplied see Accessories Section 6 SERVICE MANUAL MICRO CENTRIFUGE IV 4 FAULT CONDITIONS 4 9 Motor Fails to Start 4 10 If when the samples have been loaded into the centrifuge and the lid closed the motor fails to start and the running light fails to illuminate then one of four possible conditions has occurred 4 11 run time has not been set and the display reads 0000 4 12 The lid has not been closed properly and therefore the sensing micro switch has not been operated 4 13 The lid micro switch has not operated and the drive is inhibited If a click is not heard when the lid is closed then it is likely that the lid micro switch mechanism needs adjustment This should only be done by a qualified Technician armed with a copy of the Service Manual for this equipment or by the Hawksley Service personnel who may be contacted through the information given in the Specification section of this manual 4
21. ed T The centrifuge will run up to speed and the display read out will count down in seconds At zero the motor will be turned off and the braking sequence engaged ON SWITCH gt 1 MOTOR RUNNING cs INDICATOR TIMER UP SUITCH NOTE If the lid is open and the I button is pressed This display will show LID for two seconds then the solenoid will shut and the display will show StOP stop mode this will take approximately 20 seconds till the display shows OPEN then the the solenoid will open WRITTEN BY D GROVE DATE ISSUE REVISION PAGE 3 11 NOTE 3 12 3 13 3 14 WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SERVICE MANUAL MICRO CENTRIFUGE MK IV 3 INSTRUCTIONS FOR USE cont d During this period the digital read out will display StOP At the completion of the braking sequence the digital read out will change and display Open and at the same time withdraw the lid locking solenoid If the lid does not open press OFF button again This puts the unit into stop mode to open lid this will take approximately 20 seconds If this fails see maintenance section for mains failure for opening lid The lid can now be raised and the samples removed Upon opening the lid the digital read out will return to the set time so that repetitive testing is made easier If it is decided that the samples should undergo a second run immediately following the first
22. isinfect the rotor and rotor lid correctly use the following procedure a b 4 e Remove the rotor from the centrifuge by undoing the two fixing screws located near the drive shaft and remove the rubber rim gasket Some disinfectants and cleaning agents adversely affect the rotor causing corrosion DO USE Phenolic disinfectants chlorine bleach solutions hydrogen peroxide saline solutions acids and halogen based bleaches Only Ethanol 70 mild detergents and hot water are recommended In cases of extreme contamination the rotor and lid may be steam cleaned or autoclaved under standard conditions Remember to remove and dispose of the rubber rim gasket as this will not withstand autoclave temperatures After disinfection cleaning the rotor and lid should be thoroughly rinsed in hot water dried and re inspected for hairline cracks and other defects which might have been hidden by dirt and corrosion APPROVED BY J DINNING 1 7 97 R fo e SERVICE MANUAL MICRO CENTRIFUGE MK IV 3 INSTRUCTIONS FOR USE cont d PERIODIC INSPECTION CLEANING AND DISINFECTING f The bowl may also be cleaned whilst the rotor is removed using the above cleaning methods NOTE If it is necessary to remove the bowl to remove contamination removal must be carried out by Qualified technical personal For details of lid seal replacement please refer to maintenance section 8 Re attach the rotor to the centrifuge u
23. it is not necessary to open the lid to reset the run time remove rotor Use rotor removal tool Part No 11592 remove the two screws by the drive hub insert tool between rotor and bowl wall until it clips around rotor then lift evenly until rotor removed ROTOR REMOVAL TOOL 3 13 3 16 SER VICE MANUAL MICRO CENTRIFUGE MK IV 3 INSTRUCTIONS FOR USE cont d ROTOREADER After centrifugation unscrew cover from the rotor Push the ROTOREADER firmly on to the central spindle Rotate the centrifuge rotor to bring the required tube to be read nearest to you and restrain from further movement by holding rotor edge By turning castellated knob the base line outside black line on ROTOREADER is brought into line with the base of blood column top face of tube seal For the following operations the centre knob remains stationary on the centre spindle Turn the ROTOREADER by knob F to the inner spiral black line G to coincide with the top of blood column H Place MAGNIFIER onto the rotor reader Read off the percentage at boundary of packed cells NOTE ROTOREADER castellated knob is eccentric so that the device will allow for differing depths and types of tube seal IMPORTANT Do not operate the centrifuge with ROTOREADER attached to the rotor READER Position tube in slot so that the base of reader intersects base of red cells Move tube holder so that the top line intersects top of plasma Ad
24. just knob so that the middle line intersects top of red cells Read percentage P C V HOVE TUBE HOLDER SO LINE INTERSECTS OF PLASMA FOUNDED IN 259 POSITION TUBE SO LINE INTERSECTS BASE OF RED CELLS WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SER VICE MANUAL MICRO CENTRIFUGE MK IV 3 INSTRUCTIONS FOR USE cont d PERIODIC INSPECTION CLEANING AND DISINFECTING In order to ensure the proper operation of this centrifuge periodic preventive maintenance is necessary INSPECTION To ensure correct and safe use of the centrifuge inspect the rotor and lid regularly using the following procedure a Remove the rotor from the centrifuge by undoing the two fixing screws located near the drive shaft and remove the rubber rim gasket b Clean the rotor and rotor lid using the prescribed method detailed below c Inspect all rotor surfaces for damage dents gouges or modifications d Inspect all rotor surfaces particularly near the drive shaft and fixing screws for damage corrosion hairline cracks surface pitting or discoloration of the metal e If any of the above conditions are found the rotor must be replaced with a new one Never continue to use an impaired rotor because doing so could result in damage to the centrifuge and injury to operating personnel CLEANING AND DISINFECTING NEVER ATTEMPT TO CLEAN THE ROTOR OR ROTOR LID WHILE THEY ARE INSTALLED ON THE CENTRIFUGE To clean and d
25. many years The instrument should be serviced every 6 months Doetails are available from Hawksley amp Sons service department on 01903 752815 Fax 01903 766050 Further technical information including full component lists recommended spares lists circuit diagrams etc may be made available on request from the Hawksley service department on 01903 752815 Fax 01903 766050 Hawksley amp Sons Ltd will not accept liability for non conformance to the current recommendations for use of this product which may lead to injury or other loss WRITTEN BY D GROVE DATE ISSUE REVISION PAGE APPROVED 797 Jao
26. sing the two fixing screws taking care not to damage scratch the rotor surface Replace the rotor lid only to finger tightness The use of other than genuine Hawksley replacement parts will void all performance claims and warranties WRITTEN BY D GROVE DATE ISSUE REVISION PAGE SER VICE MANUAL MICRO CENTRIFUGE MK IV 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 WRITTEN BY D GROVE ISSUE PAGE a77 97 fo s FAULT CONDITIONS Out of Balance If rotor has not been fixed properly on rotor shaft drive nub it will not spin evenly and will cause the centrifuge to vibrate The centrifuge can tolerate a certain amount of imbalance but if it is excessive the imbalance detector will operate and close the centrifuge down When this occurs the motor will be switched off and BAL will be displayed on the digital read out during the braking sequence This condition can only be cleared by opening the lid and check rotor for uneven running Mains Failure In the case of a mains failure when the motor is running the unit must be left for 1 minute to allow the rotor to stop before overriding the lid locking mechanism and gaining access to the samples The procedure for overriding the lid lock solenoid in the case of an emergency is to insert the special tool provided into the small hole in the top left hand corner of the base Insert tool to push th
27. t d Replace motor unit Locate the motor mounting plate on it s four mounts with the motor wires facing the front of unit Replace the 5 nuts and shakeproof washers Replace the earth wire and secure with 5 nut and washer WARNING This appliance must be earthed Replace the harness plug back into the control PCB socket Replace the black cover on the control PCB Check the imbalance microswitch adjustment WRITTEN BY D GROVE DATE ISSUE REVISION PAGE APPROVED BY J DINNING 1 7 97 b SERVICE MANUAL MICRO CENTRIFUGE MK IV 8 SERVICE 2 LID LOCK The lid lock assembly needs no adjustment it is located at the front left hand side top and held in by three M2 5 x 5mm countersunk screws LOCK PIN CATCH PIN LID LOCK ASSEMBLY N HOULDING Emm 12 5 5mm COUNTERSUNK CNT ERSUNK SCREW TO REMOVE LID LOCK ASSEMBLY To remove bowl see the section on Removal of Bowl Remove black PCB cover Disconnect plug from control PCB Unscrew the three M2 5 x 5mm countersunk screws and remove assembly PUSH ON 4UAY TERMINAL ONTO PCB TERMINAL CASE PCB BOARD TO REPLACE LID LOCK Replace Lid Lock assembly Screw together making sure before tightening to align plunger to centre of lid lock slot Connect plug to PCB Replace black cover To test lid lock connect power Then push button This will self test the lid lock The procedure will take approx 20 seconds WRITTEN
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