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348 pH/Blood Gas/Electrolytes/ Haematocrit/Analyzer

1. N Remove power connector K 4 Remove earth connection 106122 Rev A 10 96 11 4 ASSEMBLY DISASSEMBLY MOTOR CONNECTOR IN 2 POSITIONS PL14 PL12 PL11 PL 13 PL8 PL2 PLO PL PLIO 106122 Rev A 10 96 12 4 ASSEMBLY DISASSEMBLY 4 4 To replace the gas restriction tubing Parts required Gas restrictor kit Cat No 105185 Power down the 348 First remove the rear cover and rear panel as described in section 4 3 The gas chassis should now be exposed Unscrew the gas cartridges and set aside removing the gas restrictor tubing with the gas cartridges in place will result in venting of the gas cartridges Follow the procedure for removing the manifold section 4 18 This gives access to the restrictor tubing at the manifold end Slide off the tubing support collars at both ends Remove the tubing Replace as necessary When replacing the restrictor tubing take great care to ensure the connections are properly made as even a small leak will result inconsiderably shorter gas cartridge life 106122 Rev A 10 96 13 4 ASSEMBLY DISASSEMBLY CAL SLOPE PHIGAS SELECTOR SELECTOR BULKHEAD MANIFOLO APERTURE 105185 Gas restrictor kit 106122 Rev A 10 96 14 4 ASSEMBLY DISASSEMBLY 4 5 To replace the regulator pressure switch assemblies Parts required Gas regulator pressure switch assembly Cat No 105170 Power down the 348 Remove the rear cover rear panel and PSU board as described in sec
2. and two levels of Hct control and check that the results are in range iv Initiate a full 2 point calibration 12 v Measure five replicates of a blood sample and check that the CV is within specification vi Initiate a full 2 point calibration 12 106122 Rev A 10 96 35 TROUBLESHOOTING 5 1 General Sections 3 and 4 of the operators manual provide extensive maintenance and troubleshooting information The information contained in this section describes some additional procedures which will aid in determining the resolution of problems within the instrument 5 2 Power supply checks Basic indications of whether the main power supplies are functioning can be derived from the status control LEDs refer to section 5 3 The following checks are carried out on the PSU PCB with respect to Ov a convenient point is TP6 Voltage Test Point 12v TP1 12v TP2 5v analogue TP3 5v analogue TP4 5v digital TP5 5 3 Status indicator check All voltages are measured Expected value 11 5 to 12 5 11 5 to 12 5 4 8 to 5 2 4 8 to 5 2 4 75 to 5 25 The status indicators are located behind the grille on the rear panel From left to right viewed from the rear these LEDs are LED Function 1 Microprocessor 2 12v 3 12v 4 5v analogue 5 5v analogue 6 5v digital 5 4 Electrode problems Status Flashing On On On On On If there are problems with electrodes ie unstable readings or
3. Schedule 13 CPU to data ports cont d N C 6 N C 7 CTS 8 N C 9 Schedule 14 CPU to keypad Keypad signal CPU PL6 Row 1 1 2 3 4 5 6 1 Row 2 7 8 9 0 C PF 2 N C 3 Ov digital 4 Column 1 7 5 Column 2 8 6 Column 3 1 9 7 Column 4 2 0 8 Column 5 3 C 9 Column 6 4 10 Column 7 5 PF 11 Column 8 6 12 5v digital 13 N C 14 106122 Rev A 10 96 58 PRE HEATER PROBE INTERFACE ARE Ys A er T P PROBE V3 CAL REAGENT GAS SELECT Ei EN CA V5 CAL REAGENT 2 V2 VENT V1 WASH W P1 m P3 SLOPE CAL GASSES WASTE WASH CAL M348 HYDRAULICS DIAGRAM K meh EEE z O PS SAMPLE WASTE PUMP D2 V6 SLOPE A REAGENT REAGENT PUMP S Pe WASTE DISPLAY MODULE ELECTRODE BLOCK ASSEMBLY SENSOR VP s ENER HEAD AMP PCB j i I PRINTER PORTI pL3 PL1 PORT2 AMP MUXI PCB ee SAMPLE DETECTORS SK2 CPU PCB PL6 EE CONTROL vy SK7 FROM PSU CAL GAS PRESSURE PL7 BE SWITCH PL3 PL 3 PSU PCB PL14 GER PL12 REAGENT PUMP PL11 PL13 PL8 PL2 PLO PL2 PL1O PLA ER SWITCH TRANSFORMER SAMPLE OO HEATER PROBE DETECTORS kustosi CONTROL CAL amp flock Gassetect FR SECT GASIGAL SAMPLE WASH amp GAS VENT
4. Vent Slope Gas Off Off OfEjOn Off On offjoff 4Secs 17 Clear Block 2 025 Off Off On Off On Off Off 10Secs 106122 Rev A 10 96 48 End State 7 HYDRAULICS 7 2 16 Prime Sequence Step Action Pumps ls Solenoids Sample Reagent V1 V2 V3 V4 V5 Vp I Prime Cal Vent Cal Gas 7 523 7 523 Off On Off Off On Off 15Secs 2 Prime Slope Vent Cal Gas 7 523 7 523 Off On Off Off Off On 15Secs 3 Prime Wash Vent Slope Gas 7 523 7 523 On On Off On Off Off 15 Secs 4 Clear Block 7 523 7 523 Off Off Off Off Off Off 6Secs 7 2 17 Deproteinise Disinfect Sequence Step Action Pumps Solenoids End State Sample Reagent VI V2 V3 V4 V5 Vp 1 Aspirate Solution 2 955 Off Off Off Off Off OfEJOfE 4 5 Secs 2 Aspirate Solution slow 1 374 Off Off Off Off Off OF OF ee td 3 Aspirate Solution fast 3 92 Off Off Off Off Off Om On 11 Secs 4or Deproteinise Off Off Off Off Off Off Om On SMins 4 Disinfect Off Off Off Off Off Off OT On 10Mins 5 Wash Note For step 5 see section 7 2 4 7 2 18 Condition Sequence Step Action Pumps Solenoids End State Sample Reagent V1 V2 V3 V4 V5 Vp I Aspirate Solution 2 955 Off Off Off Off Off Off Off 4 5 Sees 2 Aspirate Solution slow 1 374 Off Off OH OF OR On Rs 3 Condition
5. NW Serial Plate accompanying i a Symbol denotes documentation EE equipment suitable J for alternating OR P current only Gas Cartridge Compartment ZV C Power Connector Voltage Selector and Fuses IEC Symbol denoting Type 8 equipment Figure 2 106122 Rev A 10 96 3 2 CONTROLS AND SERVICES 2 3 The Rear Panel selecting voltages Open the voltage selector cover with the screwdriver supplied Insert the two fuses into the fuse holders and slide the fuse holders into the voltage selector 106122 Rev A 10 96 4 2 CONTROLS AND SERVICES 2 3 The Rear Panel selecting voltage cont d Voltage selected Voltage range 100V 85V to 110V 120V 102V to 132V 220V 187V to 242V 240V 204V to 264V Slide the voltage selector bobbin into the voltage selector so that the selected voltage is visible when the voltage selector cover is closed CAUTION Do not rotate the bobbin when it is fitted in the voltage selector as this will damage the contacts If necessary connect a suitable plug to the line cord Connect the line cord to the power connector on the rear panel Note Do not permanently affix the line cord to the power supply 106122 Rev A 10 96 3 INSTRUMENT DESCRIPTION 3 1 General The 348 Blood Gas Analyzer electrolyte haematocrit Blood Gas Analyzer is available to comply with UL CSA and IEC regulations Several languages are also available Consult your local Chiron agent to decide on w
6. Off Off Off Off Off Off OT On 5 Mins 4 Wash Note For step 4 see section 7 2 4 106122 Rev A 10 96 49 7 HYDRAULICS 7 2 19 Background Sequence Step Sequence Timing Reference 1 Vent Gas After 5 mins inactivity 7 2 20 2 Vent Gas After a further 5 mins 7 2 20 3 Int Wash After a further 5 mins 7 2 21 4 Go to step 1 After a further 5 mins Step Action Pumps Solenoids End State Sample Reagent VI v2 v3 v4 VS Vo Ss ee m meu led 1 Vent Slope Gas Off Off Off On Off On Off Off 1Sec 2or Vent Cal Gas Off Off Off On Off Off Off Off 1 Sec 2 Vent Cal Gas Off Off Off On Off Off Off Off 4 Secs Step Action Pumps Solenoids End State Sample Reagent vi V2 V3 V4 vs V6 T Aspirate Wash 7 523 7 523 On Off Off Off Off Off 1 LE or 8 secs 2 Clear Wash 7 523 Off JOffjOftJOff OffJOfEJOfE 4Secs 3 Backflush 7 523 2 025 On Off Off Off Off Off 2 Secs Wash 4 VentSlope Gas Off Off OfffOn off On off off 4Secs 5 Clear Block 2 025 Off Off On Off On Off Off 10Secs 106122 Rev A 10 96 50 INTERCONNECTIONS Schedule 1 PSU to electrode block Electrode block signal Block heater supply Block heater control Pre heater supply Pre heater control N C N C Voltage reference Pre heater temperature sense voltage Voltage reference B
7. Power down the instrument Remove the reference electrode from the electrode block Disconnect the tube passing through the outlet sample detector from the sample pump tube and slide it out of the sample detector Undo the two plastic screws underneath the electrode block and lower the lower electrode block cover This gives access to the sample detector retaining screw Remove this screw Slide the sample detector sideways and forward exposing the electrical connector at the rear of the detector Disconnect this and remove the sample detector When replacing the detector it is easier to replace the tubing by removing the insert in the detector and threading the tubing through this prior to replacement 106122 Rev A 10 96 31 4 ASSEMBLY DISASSEMBLY 673266 Inlet Sample Detector 105671 Pre heater 473056 Block Detector Plunger ju TR are 473057 r TT lt Biock Connecto 673309 Outlet Sample Detector 106122 Rev A 10 96 32 ASSEMBLY DISASSEMBLY 4 21 To replace the amplifier board Parts required Amplifier board Cat No 105171 Follow the procedure describes in section 4 3 to remove the rear cover and panel Disconnect the probe connector to the pre heater assembly and disconnect the pre heater to the manifold connector Disconnect the tube coming out of the second sample detector from the sample pump tube Remove all electrodes from the electrode block Follow the procedure outlined in
8. eg new language capability added Status on restart As for a warm start see section 5 6 3 with a 2pt calibration forced and Hct slope prompted 106122 Rev A 10 96 39 TROUBLESHOOTING 5 6 3 5 6 4 Warm Start Conditions under which this will occur Power interruption long enough to cause a processor reset Status on restart Nothing changed Calibration If the electrode block is still inside operating temperature limits the calibration sequence will not be affected and after a brief display of warming up the Ready screen will be displayed If the electrode block is outside temperature limits then two 2pt calibrations 10 minutes apart will be initiated once the system achieves operating temperature Ram Corruption restart Conditions under which this will occur Corruption RAM checksum Status at restart Dependent on where corruption occurred If calibration is affected two 2pt calibrations 10 minutes apart will be initiated If other data is corrupted default values will be assumed If sample data is corrupted data recall will signal no data available On restart the centre of the display will have check set up flashing Pressing the key will cancel this message It is advisable to check the options in operating set up 5 and system set up 6 if this occurs 106122 Rev A 10 96 40 6 SPARES 6 1 Ordering information When ordering spares or accessories for the 348 please give the
9. 15 Aspirate Cal 1 808 2 025 Off Off Off Off On Off SD2 detects LE 16 Measure Off Off Off Off Off Off Off off End of Measure 7 2 12 Slope pH lytes Sequence Step Action Pumps Solenoids End State Sample Reagent ivi V2 v3 V4 VS V6 1 Aspirate Air 7 523 Off l orrfofrjorrjorrforrort 4Secs 2 Aspirate Wash 7 523 7 523 On OfflOfflOfloffloff 18ec 3 Clear Wash 7 523 off On Off Off OFf Off Off 18ec 4 Clear Wash 7 523 2 025 Onlofrjoff offjoffjoff 28ec 5 Prime Slope 1 808 2 315 Offjofrjoff offjoffjoff 38ecs 6 l Aspirate Slope 1 808 2 315 Off Off Off Off Off On 4Secs 7 Aspirate Air 1 808 2 025 Off OffJOff Off OfEJOfE 88ecs 8 Aspirate Slope 1 808 2 315 Off Off Off Off Off On SD2 detects LE 9 Measure Off Off Off Off Off Off Off off End of Measure 7 2 13 Gas Cal Sequence Step Action Pumps Solenoids End State Sample Reagent ivi V2 v3 VYA VS V6 1 ClearBlock 7 523 Off Jorrforrjorrjorr orrfor 2Ses 2 Aspirate Wash 7 523 7 523 On Off Off Off Off Off 1Sec 3 Aspirate Air 7 523 Off Off OfE O EJO EJOfEJO EJ 18ec 4 Clear Wash 7 523 2 025 On Off OffJOff OfEJOfE 28ecs 5 Clear Cal 7 523 2 025 Off Off Off Off On Off 7Secs 6 Vent Cal Gas Off Off Off On Off OfflOfIOff 10Secs 7 Aspirate Gas 2 749 Off Off Off On OfflOff Off End of Measu
10. SLOPE PUMP SOLENOIDS SOLENOIDS SOLENOIDS MAINS INLET M348 ELECTRONICS SYSTEM 30 01 96 PEEK TUBING RESTRICTOR FILTER C 4 REGULATOR GAS 1 CAL FILTER PEEK TUBING RESTRICTOR FILTER REGULATOR PRESSURE SWITCH 1 BAR GAS 2 SLOPE FILTER 348 ON BOARD GAS SYSTEM MANIFOLD
11. The output of V4 is then fed into V2 which either vents the gas to the weir area or feeds it via V3 into the sample path via the first tee junction Wash solution is controlled by V1 which allows recirculation of the wash or directs it to the probe Calibration solution is controlled by V5 which recirculates it or directs it via V3 into the sample path via the first tee junction Slope solution is controlled by V6 which recirculates it or directs it into the sample path via the second tee junction Fluid flow is controlled by two pumps The sample waste pumps the excess reagent which collects in the weir to waste via P2 and the outflow from the sample block to waste via P5 P2 and P5 are on the sample pump roller assembly The three reagents wash cal and slope are pumped by the P1 P3 and P4 tubes on the reagent pump roller assembly Sample positioning is controlled by SD1 and SD2 which are optical detectors For short samples which can result in the auto split sample mode being initiated the Hct sensor acts as a sample detector Electronic system Please refer to Figure 4 when reading the following description The instrument is under software control from a microprocessor which executes the program resident on the plug in ROM card All associated CPU circuitry chip decoding RAM interrupt control etc is located on the CPU board This board also provides interfacing to the display module printer keypad and data ports 106
12. a multiplexer board a probe interface board a display module and a printer The amplifier board and multiplexer board fix together to form an amplifier assembly The CPU board is mounted on the display moulding The power supply interface board is mounted at right angles to the CPU board and plugs directly into it through a slot in the main body moulding The display module and keypad fit into the display the display module moulding which fits to the top of the main body moulding The amplifier assembly is integral with the electrode block and the probe interface is integral with the probe assembly The printer occupies the top right hand corner of the main body moulding 106122 Rev A 10 96 6 INSTRUMENT DESCRIPTION 3 3 3 4 The instrument software is incorporated in a ROM card which is accessible through a slot in the top of the instrument It plugs directly into the CPU board and the slot is sealed with a flexible rubber strip Hydraulics System Please refer to Figure 3 when reading the following description The main hydraulics system consists of a perspex manifold mounted on the front of the main body moulding The solenoid valves which control the various reagents and gases are mounted directly onto the manifold Tubing systems then direct the reagents and gases to the appropriate points in the probe and electrode block Calibration gases are fed into V4 which selects the appropriate gas required for the current operation
13. be performed Note When carrying out any procedure which involves handling of printed circuit boards anti static precautions should be taken 4 2 Pre service Protocol i Access system set up in the main menu and initiate set up printout 67 11 On completion of the set up printout remove and retain for future reference ili Disconnect instrument from the main electrical supply iv Carry out service procedure v Perform post service protocol 106122 Rev A 10 96 9 4 ASSEMBLY DISASSEMBLY 4 3 To replace the power supply board Parts required PSU board Cat No 106225 Note Anti static precautions should be followed for this procedure Power down the 348 Remove the nine screws holding the rear cover in place Note that the two screws fixing the bottom of the rear cover are longer than the rest Remove the rear cover Disconnect the transformer connection to the power board PL11 Disconnect the earth lead on the right hand side of the rear panel as viewed from the rear Remove the four screws holding the rear panel in place Remove the rear panel Disconnect all remaining connections to the PSU board PLI PL6 PL8 PL10 and PL12 PL 14 Remove the three screws holding the board in place at the ends of each of the three support brackets Remove the board carefully ensuring that none of the components on it foul against the support brackets The PSU board can now be replaced 106122 Rev A 10 96 10 ASSEMBLY DISASSEMBLY
14. module CPU PL1 5v display 1 N C 2 Ov digital 3 Display Module CPU PL3 Ov digital 1 Display data bit 7 2 Ov digital 3 Display data bit 6 4 Ov display 5 Display data bit 5 6 Ov digital 7 Display data bit 4 8 Ov digital 9 Display data bit 3 10 Ov digital 11 Display data bit 2 12 Ov digital 13 Display data bit 1 14 Ov digital 15 Display data bit 0 16 Ov display 17 Control bit 1 18 Ov display 19 Control bit 2 20 Ov display 21 Control bit 3 22 Ov display 23 Control bit 4 24 Control bit 5 25 N C 26 Note All Ov digital pins are linked on the CPU board Schedule 12 CPU to printer Printer signal CPU PL2 Control line 1 1 Control line 2 2 Control line 3 3 Control line 4 4 106122 Rev A 5 96 56 INTERCONNECTIONS Schedule 12 CPU to printer cont d 5v printer 5v printer 5v printer Dot 8 Dot 7 Dot 6 Dot 5 Dot 4 Dot 3 Dot 2 Dot 1 Control line 5 Control line 6 Control line 7 Control line 8 5v printer 5v printer Ov digital Position sense output Note All 5 volt printer pins are lined on the CPU board Schedule 13 CPU to data ports Data port 2 signal N C Tx data Rx data DTR Ov digital N C N C CTS 5v digital Data port 1 signal N C Tx data Rx data DTR Ov digital 106122 Rev A 5 96 57 D I ON L 11 12 13 14 15 16 17 18 19 20 21 22 23 CPU PL4 1 I OO Lh EL D CPU PLS 1 Ln BR LA 8 INTERCONNECTIONS
15. now be eased forward to give access to the solenoid assemblies If necessary the gas lines can be disconnected from the manifold to improve access Remove each of the solenoid assemblies by peeling off the label covering the retaining screws and removing the three retaining screws per solenoid assembly When replacing the manifold ensure that the sealing strip along the top and down the right side is in place Also ensure the solenoid assemblies are plugged into the correct ports on the PSU board and the gas lines connected correctly The line from the 2 should connect to the uppermost of the two gas ports 106122 Rev A 10 96 29 4 ASSEMBLY DISASSEMBLY 8 673271 i MANIFOLD IG 673 278 SOLENOID GAS FILTER FEEK TUBING ASSEMBLIES 106122 Rev A 10 96 30 4 ASSEMBLY DISASSEMBLY 4 19 To replace the inlet sample detector and pre heater assembly Parts required Sample detector inlet Cat No 673266 Pre heater assembly Cat No 105671 Power down the instrument Disconnect the pre heater from the probe carriage and the manifold Remove the sample detector cap from the front of the electrode block exposing the pre heater retaining screw Unscrew this screw and remove the perspex pre heater cover and the pre heater assembly Grip the protruding part of the sample detector and pull it forwards to remove it It can then be replaced 4 20 To replace the outlet sample detector Parts required Sample detector outlet Cat No 673359
16. of continuous product improvement and the right to change prices specification equipment and maintenance procedures at any time without notice is reserved The 348 Analyzer is classed as IEC Type B equipment Class I Equipment providing an adequate degree of protection against electric shocks particularly regarding allowable leakage currents and reliability of the protective earth connection 106122 Rev A 10 96 ii CONTENTS Page 1 Introduction 1 2 Controls and Services 2 1 User controls and displays 2 2 2 Other connections and services 2 2 3 Rear panel selecting voltages 4 3 Instrument description 3 1 General 6 3 2 Structural 6 3 3 Hydraulic system 7 3 4 Electronic system 7 3 5 Gas system 8 4 Assembly disassembly 4 1 Introduction 9 4 2 Pre service protocol 9 4 3 To replace the PSU board 10 4 4 To replace the gas restrictor tubing 13 4 5 To replace the regulator pressure switch assembly 15 4 6 To replace the CPU board 18 4 7 To replace the printer 22 4 8 To replace the display module 22 4 9 To replace the keypad 22 4 10 To replace the motor gearbox assembly 24 4 11 To replace the fan 24 4 12 To replace the BP sensor 24 4 13 To replace the tube tensioners 24 4 14 To replace the transformer assembly 26 4 15 To replace the probe lever 27 4 16 To replace the probe bracket 27 4 17 To replace the probe sensor 27 4 18 To replace the manifold and solenoid assemblies 29 4 19 To replace the inlet sample detector and pr
17. section 4 3 to remove the PSU board Disconnect the two pressure switch connectors Unscrew the four retaining screws note their different lengths holding the electrode block in place Remove the electrode block assembly Unscrew the four screws holding the electrode block cover in place After removing the cover the amplifier board is exposed Undo the three screws holding the amplifier assembly in place The one nearest the ribbon cable connector will need to be unscrewed further than the other two Once loosened the amplifier board can be extracted using the tool provided The two lugs in the tool locate in the two semi circular holes at either side of the amplifier assembly The assembly can then be eased out of the electrode block and replaced 106122 Rev A 10 96 33 4 ASSEMBLY DISASSEMBLY 105171 Amplifier Assembly Screws in 3 positions 105178 Electrode Block Assembly 106122 Rev A 10 96 34 4 ASSEMBLY DISASSEMBLY 4 22 Post Service protocol On completion of any of the procedures described which necessitate powering down the 348 the following steps should be taken i Reconnect the 348 to the supply ii Select print set up in the system set up part of the main menu ff 67 Check that the set up is the same as prior to the service procedure If not enter the relevant set up parameters as required iii Once the 348 has reached operating temperature and calibrated measure three levels of IC eg Certain
18. 02 B23 B24 Port 103 B24 B25 Probe ampoule position detector output B25 B26 Oc digital B26 B27 N C B27 B28 Voltage threshold B28 B29 5v analogue B29 B30 5v analogue B30 B31 Ov analogue B31 B32 Temp4 B32 Note The following pins are all linked separately by function on both the CPU and PSU 5v digital Ov digital 5v analogue 5v analogue Ov analogue 12v 12v 22v Schedule 7 PSU to solenoids Solenoid signal PSU PL8 12v 1 pH Cal on off V5 2 12v 3 Wash on off V1 4 106122 Rev A 5 96 54 INTERCONNECTIONS Schedule 7 PSU to solenoids cont d 12v Vent on off V2 12v Gas select on off V4 12v pH Cal gas select on off V3 12v pH slope on off V6 PSU PL9 1 2 3 4 PSU PL10 1 2 3 4 Note All 12v pins are linked on the PSU board Schedule 8 PSU to transformer Transformer 18 VAC secondary a 18 VAC secondary a 18 VAC secondary b 18 VAC secondary b 18 VAC secondary c 18 VAC secondary c System ground N C Schedule 9 PSU to pump motors Pump motor signal Reagent pump drive voltage Ov 12v supply Ov 12v supply Sample waste pump drive voltage Schedule 10 PSU to gas chassis Gas chassis signal Cal pressure switch Slope pressure switch 5v digital 106122 Rev A 5 96 PSU PL11 1 GO IN Lh EL D PSU PL12 1 2 PSU PL13 1 2 PSU PL14 4 9 10 55 8 INTERCONNECTIONS Schedule 11 CPU to display Display
19. 0Secs 106122 Rev A 10 96 45 HYDRAULICS 7 2 5 Full 1 Point Sequence Step Sequence Reference 1 Cal pH Lytes 7 2 11 2 Gas Cal 7213 3 CalWash 7215 Step Sequence Reference 1 Cal pH Lytes 7 2 11 2 Slope pH Lytes 7 2 12 3 Gas Cal 7219 4 Gas Slope 7 214 5 Cal Wash 7 215 Step Seguence Reference 1 Gas Cal 7213 2 CalWash 7215 Step Seguence Reference 1 GasCal 7 213 2 GasSlope 7214 3 CalWash 7215 Step Sequence Reference 1 CalpH Lytes 7 2 11 3 Cal Wash 7215 7 2 10 pH Lytes 2 Point Sequence Step Sequence Reference 1 CalpH Lytes 7 2 11 2 SlopepHiytes 7 2 12 3 Cal Wash 7 2 15 106122 Rev A 10 96 7 HYDRAULICS 7 2 11 Cal pH lytes Sequence Step Action Pumps Solenoids End State Sample Reagent ivi V2 V3 V4 VS V6 1 AspirateCal 1 808 2 025 Off Off Off Off On Off 4Secs 2 Aspirate Air 1 808 2 025 Off ofrjoff offjoffjoff 3Secs 3 Aspirate Cal 1 808 2 025 off ofrjoff offjon off 18ec 4 Aspirate Air 1 808 2 025 off ofrjoff offjoffjoff 1Sec 5 12 Repeat steps 3 4 4 times 13 Aspirate Cal 1 808 2 025 Off OffJOffJOff On Off 1Sec 14 Aspirate Air 1 808 2 025 Off ofrjoff offjoffjoff 11Secs
20. 122 Rev A 10 96 7 INSTRUMENT DESCRIPTION 3 5 The CPU board receives power from the Power Supply board and provides signals interfaces to the rest of the system The Power Supply board converts AC power to the DC power required by the electronic circuitry and also provides interfaces for the fan the reagent and sample motors all the solenoids the probe assembly the BP sensor and the electrode block assembly All analog signals in the system are fed via a multiplexer to the A D converter which is situated on the Power Supply board Gas chassis Please refer to Figure 5 when reading this section The two gas mixtures required cal and slope are supplied in two gas cartridges These cartridges screw into a regulator pressure switch assembly The pressure switches activate at a level of 1 bar and this prompts the user via the display to change the cartridges The regulator is pre set to 5psi The gases then pass through a filter which is part of the regulator pressure switch assembly into a restrictor comprised of a length of peek tubing The gases then enter the manifold via a further filtered connection 106122 Rev A 10 96 8 4 ASSEMBLY DISASSEMBLY 4 1 Introduction The following description of how to disassemble the 348 should be used in conjunction with the relevant figures and exploded views Before carrying out any procedure which reguired power to be disconnected from the 348 the pre service protocol section 4 2 should
21. 3055 Block thermistor assembly 1 473056 Detector plunger 1 473057 Block connector 1 570000 Rotor knob kit 1 673366 Solenoid screw labels pk of 10 673367 PCB brackets pk of 3 673368 Sample detector access cover 1 673369 Rubber feet pk of 4 673370 Power inlet 1 105260 Rear cover 1 106193 Gas cartridge cover 1 105170 Gas regulator pressure switch assembly 1 6 2 Engineering Spares Kit As most parts are common with the 248 there is not a complete engineering spares kit There is an addition kit catalogue number 108571 This kit should be used in conjunction with either 673279 Engineering Spares Kit or 673363 248 Spares Kit level 1 The contents of the addition kit 108571 are Catalogue number Description 105170 Gas regulator pressure switch assembly 105171 Amplifier assembly 105177 Memory card kit 105185 Gas restrictor kit 105673 Pump tube kit 105672 Bottle tubing kit 105671 Pre heater kit 106122 Rev A 10 96 42 7 HYDRAULICS 7 1 Introduction The hydraulic sequences are set out as a series of tables Sub sequences are given in detail and overall sequences as a set of sub sequences For example the full 1 point sequence is given as a set of references to the sub sequences that make it up The numbers in the columns referring to the sample and reagent pumps are voltages The sample pump voltage is always negative The reagent pump voltage is always positive except for a small number of occasions when the pump runs
22. 348 pH Blood Gas Electrolytes Haematocrit Analyzer Service Manual Chiron Diagnostics 106122 Rev A 10 96 The 348 Blood Gas Analyzer is designed for fast and accurate measurement of whole blood The 348 measures pH pO2 pCO2 Na K Hct and either Ca or Cl and uses a sample volume of 95ul The service manual contains complete instructions for servicing the 348 Warning The 348 is designed to be grounded through the power supply lead line cord for safe operation For the safety of operating personnel make sure that the instrument is only connected to 3 prong sockets outlets that have an effective earth connection If you are in any doubt as to the safety of your electrical supply system consult a competent qualified electrician There are no user replacement parts within the instrument Do not remove the covers from the 348 Chiron Diagnostics and their Authorized Distributors and Agents consider themselves responsible for the effects on safety reliability and performance of the 348 only if i Assembly operations extensions re adjustments modifications or repairs are carried out by persons authorized by them 11 The electrical installation of the relevant room complies with IEC reguirements or the local regulatory code and 111 The eguipment is used in accordance with the instructions for use The information contained in this manual was correct at time of going to print However Chiron Diagnostics policy is one
23. PL6 TO SK2 106195 CPU Board Note spacer 106122 Rev A 10 96 21 4 ASSEMBLY DISASSEMBLY 4 7 To replace the printer Parts required Printer head Cat No 673267 Follow the procedure described in section 4 6 to remove the CPU board Once the CPU board is removed the printer head can be removed by unscrewing the three remaining screws on the printer tray and then removing the printer head from the printer tray and replacing 4 8 To replace the Display Module Parts required Display Module Cat No 673263 Follow the procedure described in section 4 6 to remove the CPU board Unscrew the two pillars at the top of the display board and remove the two screws at the bottom The display module can now be lifted out and replaced 4 9 To replace the keypad Parts required Keypad Cat No 673270 Follow the procedure described in section 4 6 to remove the CPU board Remove the eight nuts and washers which retain the keypad in place The keypad can now be removed from the front panel and replaced 106122 Rev A 10 96 22 4 ASSEMBLY DISASSEMBLY 673270 Keypad 673263 Display Board 673267 Printer Head 106122 Rev A 10 96 23 4 ASSEMBLY DISASSEMBLY 4 10 To replace the motor gearbox assemblies Parts required Motor gearbox Cat No 478666 Power down the 348 Remove the pump tube cassette from the relevant rotor cage Unscrew the rotor screw in the end of the rotor cage Slide the rotor cage off the motor shaft Remove th
24. The bracket can then be replaced 4 17 To replace the probe sensor Parts required Probe sensor Cat No 673284 Remove the probe bracket assembly as described in section 4 16 The probe sensor can be removed by unscrewing the single retaining screw on the left hand side of the assembly when viewed from the rear and removing the sensor assembly for replacement 106122 Rev A 10 96 27 4 ASSEMBLY DISASSEMBLY 673 284 PROBE SENSOR PCB 673 286 PROBE BRACKET NOTE BLACK DOTTED LINE ON CABLE DESIGNATES PIN 1 TO BE POSITIONED TO THE RIGHT 106122 Rev A 10 96 28 ASSEMBLY DISASSEMBLY 4 18 To replace the Manifold or Solenoid assemblies Parts required Manifold Cat No 673271 Solenoid Cat No 673278 Remove the reagent bottles from the front of the instrument Place a tissue under the ends of the reagent tubes to soak up excess reagent Using the maintenance option in the main menu select the prime option 32 Remove the gas cartridges Power down the 348 Follow the procedure described in section 4 3 to remove the rear cover and panel Disconnect the three solenoid assemblies from the PSU board Remove the drip tray connector to the manifold and the pre heater connector Remove the two tubing cassettes sample waste and reagent from the manifold Remove the reagent tubing and the waste bottle Unscrew the six nylon screws holding the manifold solenoid assembly in place The manifold solenoid assembly can
25. age reference VRefBuf Ov analogue Voltage offset Voffset Ov analogue Mux output AnalogIn Ov analogue Mux select MuxSel 2 Ov analogue Ov analogue Ov analogue Signal 5v digital 5v digital 5v digital 52 PSU PL14 1 3 5 6 PSU PL5 1 GO IN Lh EL D 11 12 13 14 15 16 17 18 19 20 PSU PL6 1 2 PSU PL7 Al A2 A3 8 INTERCONNECTIONS Schedule 6 PSU to CPU cont d A4 Ov digital A4 AS Ov digital AS A6 Ov digital A6 AT 12v A7 CPU SK7 Signal PSU PL7 A8 Ov digital A8 A9 12v A9 A10 22v A10 All N C All A12 100 A12 A13 101 A13 A14 102 A14 A15 103 A15 A16 104 A16 Al7 105 Al7 A18 106 A18 A19 107 A19 A20 Sv digital A20 A21 Sv digital A21 A22 N C A22 A23 Disable P A23 A24 Probe home position detector output A24 A25 Probe syringe position detector output A25 A26 Ov digital A26 A27 SD1 output A27 A28 SD2 output A28 A29 5v analogue A29 A30 5v analogue A30 A31 Ov analogue A31 A32 Voltage reference VRefBuf A32 Bl 5v digital Bl B2 5v digital B2 B3 5v digital B3 B4 Ov digital B4 B5 Ov digital B5 B6 Ov digital B6 B7 12v B7 B8 Ov digital B8 B9 12v B9 B10 22v B10 B11 N C B11 106122 Rev A 5 96 53 8 INTERCONNECTIONS Schedule 6 PSU to CPU cont d B12 Se10 B12 B13 Sell B13 B14 Se12 B14 B15 Se13 B15 B16 Sel4 B16 B17 Sel5 B17 B18 Se16 not used B18 B19 Se17 not used B19 B20 ADDCLK B20 B21 ADCDATA B21 B22 Port 101 B22 B23 Port 1
26. are held in place with three screws removable from the rear of the bulkhead The three position tensioner is located on the left hand side of the bulkhead when viewed from the rear and the two position tensioner is more central to the bulkhead They can then be reached To replace the transformer assembly Parts required Transformer assembly Cat No 105223 Follow the procedure described in section 4 3 to remove the rear panel Remove the nut holding the earth lead in place Remove the two nuts retaining the voltage input selector Undo the four screws retaining the transformer in place The transformer assembly can now be replaced 105223 Transformer Assembly 106122 Rev A 10 96 26 4 ASSEMBLY DISASSEMBLY 4 15 To replace the probe lever Parts required Probe lever Cat No 673285 First remove the probe carriage by disconnecting it from the pre heater input and then raising the probe to its topmost position and sliding the probe carriage out The probe lever can then be removed by squeezing the two sides together sufficiently to release the lever It can then be replaced 4 16 To replace the probe bracket Parts required Probe bracket Cat No 673286 Follow the procedure described in section 4 3 to remove the rear cover and panel Disconnect the front cable from the PSU board Unscrew the three retaining screws holding the probe bracket in place and remove the bracket sliding the flat cable connector through the hole in the bulkhead
27. backward and then the voltage is negative 7 2 Sequences See pages 45 51 106122 Rev A 10 96 43 7 HYDRAULICS 7 2 1 Sample Sequence Step JAction Pumps Solenoids End State Sample Reagent VI V2 V3 V4 VS Vp 1 Aspirate 2966 Of orrforororor om 38 2 Aspirate 1 374 Off Off Off Off Off Off Off SD1 detects LE 3 Aspirate 1 374 0ff Off Off Off Off Off Off Off SD1 detects TE 4 Measure Off Off Off Off Off Off Off Off End of Measure 5 Wash Note For step 3 the sample motor alternates between 1 374 and off For step 5 see section 7 2 4 7 2 2 QC Sequ Step Action _ 1 Aspirate 2 Aspirate 3 Aspirate 4 Measure 5 Wash Note For step 5 see section 7 2 4 7 2 3 Hct Slope Sequence Step Action 5 Wash __ 1 Aspirate 2 Aspirate 3 Aspirate 4 Measure SD1 detects LE SD2 detects LE 3 Secs End of Measure SD1 detects LE 3 Secs End of Measure ence Pumps Solenoids fendstate Sample Reagent VI V2 V3 V4 VS Vp 2 966 Off Off Off Off Off Off Off 2 966 Off Off Off Off Off Off Off 2 966 Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off EE Step Action Pumps Solenoids EndStte Sample Reagent VI V2 V3 V4 VS V
28. d operator interaction are performed via a multiline 40 character vacuum fluorescent display and a numeric keypad The 348 is designed for fast accurate determination of pH pO2 pCO Na K Hct and either Ca or Cl It is also capable of measuring Barometric Pressure Certain calculated parameters are also available based on the measured data Parameter Symbol Actual bicarbonate HCO act Standard bicarbonate HCO std Base excess extra cellular fluid BE ecf Base excess blood BE B Total carbon dioxide ctCO Adjusted calcium Ca 7 4 1 Anion gap AnGap 2 Oxygen saturation OSAT Oxygen content OCT 3 Alveolar arterial difference pO A a 4 Arterial alveolar ratio pO a A 4 Oxygenation ratio pO a F10 4 Estimated haemoglobin ctHb est 5 Notes Available only if Ca is fitted Available only if CI is fitted 3 Utilises tHb if entered otherwise uses tHb est If neither estimated or entered tHb is available then OCT is not available 4 Available only if FO is entered De Is overridden by entered tHb Nie 106122 Rev A 10 96 1 CONTROLS AND SERVICES 2 1 2 2 User controls and displays refer to Figure 1 Alpha numeric display Multi line 40 character vacuum fluorescent display for presentation of results operator options and status information Printer 32 character dot matrix thermal printer for recording results calibration and set up data Keypad 15 key keypad consisting of 10
29. e locating pin from the motor shaft Remove rear cover panel and PSU as described in section 4 3 Unscrew the two fixing screws one at each side of the motor gearbox assembly Withdraw the assembly through the bulkhead and replace 4 11 To replace the fan Parts required Fan Cat No 474745 Follow the procedure described in section 4 3 to remove the rear panel Disconnect the fan from the PSU board Unscrew the four retaining screws and remove the fax and replace 4 12 To replace the BP sensor Parts required BP sensor Cat No 813014001 Follow the procedure described in section 4 3 to remove the rear cover panel and PSU board Unscrew the two retaining screws and remove the BP sensor and replace 4 13 To replace the tube tensioners Parts required Tube tensioning kit Cat No 673274 Follow the procedure described in section 4 3 to remove the rear cover panel and PSU board Follow the procedure described in section 4 4 and 4 5 to remove the gas cartridge assembly 106122 Rev A 10 96 24 4 ASSEMBLY DISASSEMBLY 473 765 arrow detail onside of fan WRITING FACING up Wes LERGA a a REMOVE 4 FIXING SCREWS REMOVE 2 i FIXING SCREWS V 478 666 MOTOR GEARBOX lt 8P SENSOR REMOVE 2 FIXING SCREWS REMOVE 3 FIXING SCREWS per tensioner TENSIONING KIT 106122 Rev A 10 96 25 ASSEMBLY DISASSEMBLY 4 14 The two tube tensioners one with three tube positions and one with two tube positions
30. e heater assembly 31 4 20 To replace the outlet sample detector 31 4 21 To replace the amplifier board 33 4 22 Post service protocol 36 continued 106122 Rev A 10 96 iii Contents cont d Page 5 Troubleshooting 5 1 General 37 5 2 Power supply checks 37 5 3 Status indicator check 37 5 4 Electrode problems 37 5 5 Hydraulic problems 38 5 6 System re starts 39 6 Spares 6 1 Ordering information 42 6 2 Engineering Spares Kit 43 7 Hydraulics 7 1 Introduction 44 7 2 Sequences 45 8 Interconnections 52 Figures Figure 3 Hydraulic system Figure 4 Electronics system Figure 5 Gas system Figure 6 AC power supplies Figure 7 PSU layout Figure 8 CPU layout top Figure 9 CPU layout bottom Figure 10 Amplifier layout Figure 11 Keypad circuit diagram Figure 12 Probe sensor circuit diagram Figure 13 Amplifier circuit diagram Figure 14 Multiplexer circuit diagram Figure 15 PSU circuit diagram sheet 1 Figure 16 PSU Circuit Diagram sheet 2 Figure 17 PSU circuit diagram sheet 3 Figure 18 PSU circuit diagram sheet 4 Figure 19 PSU circuit diagram sheet 5 Figure 20 CPU circuit diagram sheet 1 Figure 21 CPU circuit diagram sheet 2 Figure 22 CPU circuit diagram sheet 3 Figure 23 CPU circuit diagram sheet 4 Figure 24 CPU circuit diagram sheet 5 106122 Rev A 10 96 iv 1 INTRODUCTION 1 1 Introduction The 348 is a direct reading blood gas electrolytes haematocrit analyzer Results an
31. following information to your Chiron Diagnostics distributor 348 serial number Catalogue number of part Cat Description Quantity required This will ensure that your order is dealt with quickly and efficiently The number shown in the third column Quantity is the quantity supplied against the stated catalogue number If the quantity is greater than 1 only multiples of that quantity can be supplied Catalogue number Description Quantity 478648 Fuse pack UL CSA 2 per pk 478916 Fuse pack IEC 2 per pk 478937 Voltage select bobbin 1 106195 CPU board 1 106225 PSU board 1 105171 Amplifier board 1 673263 Display module 1 105177 Memory card 1 673284 Probe sensor assembly 1 673285 Probe lever 1 673286 Probe bracket 1 673266 Sample detector inlet 1 673359 Sample detector outlet 1 473745 Fan 1 673267 Printer head 1 673269 Printer cover 1 673268 Printer cradle 1 478666 Motor gearbox kit 1 478664 Rotor kit 1 814013001 BP sensor 1 673278 Solenoid assembly 1 673270 Keypad 1 673271 Manifold 1 105178 Electrode block assembly 1 105185 Gas restrictor kit 1 673274 Tube tensioner kit 1 673265 Memory card sealing strip 1 105223 Transformer and mains inlet assembly ih 106122 Rev A 10 96 41 6 SPARES 673281 Main bulkhead 1 673282 Main cover 1 673283 Display moulding 1 673275 Hardware kit 1 673276 O ring kit 1 106122 348 service manual 1 105227 Display window 1 473050 Block extension spring 1 473051 Catch moulding 1 47
32. hich version is appropriate for your customer 3 2 Structural The casework of the instrument is a combination of plastic mouldings and sheet metalwork The main body structure is a plastic moulding which has mounted on it the main hydraulic components solenoid valves pump etc The electrode block is mounted to the front of the moulding as is the probe assembly The power plate is of folded sheet metalwork fitted to the rear of the gas chassis This plate has the main power inlet and transformer fixed to it The gas chassis is of sheet metal construction with two regulator pressure switch assemblies mounted on the left had side A plastic moulding with two gas cartridge guide tubes fits into the gas chassis and covers the right had side of the instrument The two gas cartridges slide into the two access tubes and are screwed into position The main electronic components are mounted on the main body moulding at the top of the instrument The keypad and display are also mounted on the display moulding which fits to the top of the main body moulding A cover with a viewing window is hinged to the sides of the main body moulding This cover can be raised to give access to the system for maintenance and troubleshooting The viewing window allows for the sample path visibility During aspiration of the sample path is illuminated The electronic system consists of the following The CPU board a power supply interface board an amplifier board
33. lock temperature sense voltage Note pins 7 and 0 are linked on the PSU board Electrode block signal SD1 LED voltage supply SD2 LED voltage supply SD1 voltage on off control SD2 LED voltage on off control SD1 sense voltage Ov analogue SD2 sense voltage Ov analogue Note pins 6 and 8 are linked to the PSU board Schedule 2 PSU to BP sensor BP sensor signal BP sensor voltage supply BP sensor sense voltage Ov analogue Schedule 3 PSU to probe Probe signal Voltage reference to thermistor Thermistor sense voltage Syringe position detector output Ov digital Home position detector output Ampoule position detector output Ov digital Note pins 4 and 7 are linked on the PSU board 106122 Rev A 5 96 51 PSU PL1 1 IA Un D PSU PL2 1 GO IN RV PSU PL3 1 2 3 PSU PL4 1 ANM ELM D INTERCONNECTIONS Schedule 4 PSU to amplifier PCB Amplifier board SK5 1 AN amp D 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Schedule 5 PSU to fan Fan signal Ov 12 volt supply 12v Schedule 6 PSU to CPU CPU SK7 Al A2 A3 106122 Rev A 5 96 Signal 12v 12v Hematocrit measure enable HCTEN Sample chamber LEDs control LEDOFF N C N C Mux select Port 4 0 Mux select Port 4 1 Mux select Port 4 2 Mux select MuxSel I 5v analogue 5v analogue 5v analogue 5v analogue Ov analogue Ov analogue Volt
34. numeric keys 0 9 key key clear c key decimal point key and paper feed key The keypad is used to initiate instrument operations enter data and respond to display instructions For full details of keypad display interaction see section 2 of the instruction manual Probe lever The probe lever can be raised to one of two possible sampling positions syringe or capillary Presentation of the sample will automatically initiate the operational sequence A third position allows removal of the probe carriage assembly Rear and side panel connectors refer to Figure 2 Power Input AC power connection incorporating fuses and voltage selection Data output 2 data output ports Port 1 and Port 2 Both are 9 way D type connectors Port 1 isa female connector for RS232 communication only and Port 2 is a male connector for use as both RS232 communications and a bar code reader Gas chassis Two access holes for insertion of cal and slope gas cartridges 106122 Rev A 10 96 2 2 CONTROLS AND SERVICES Vacuum Fluorescent Display Paper Advance Numeric Operating pa Keypad Probe Lever lift to first position to sample from ampules Vacutainers vials and other open top containers Lift to second position to sample trom syringes and capillaries Figure 1 Data Ports Mi 9 way D line si K Status jez Or indicators N o OM i I Instrument Ground IEC Symbol Test Point advising user to refer to EN
35. om the main instrument Thread the earth strap through the hole in the main moulding Place the instrument cover to one side ensure the two bearing bushes are retained in place on the cover Lay the sub assembly face down on a protective surface to prevent scratches occurring on the front panel Remove the earth connection to the stud on the printer tray Remove the metal grill from the board by unscrewing the four hex nuts on the two data ports Remove the six screws holding the CPU board in place Disconnect the 26 way ribbon cable at the top left hand corner of the board and the two power connections in the centre at the right hand side of the board Disconnect the keypad connector at the bottom left hand side of the PCB Disconnect the printer head connector sliding the outer cover of the connector towards the bottom of the CPU board and then sliding the connector tail out Lift the CPU board clear of the sub assembly Note that the screw in the bottom left hand corner of the board is longer than the others and passes through a spacer to the printer assembly The CPU board can then be replaced 106122 Rev A 10 96 18 4 ASSEMBLY DISASSEMBLY 673265 Memory Card Sealing Strip be II 673269 Printer Cover 673268 Printer Cradle 106122 Rev A 10 96 19 4 ASSEMBLY DISASSEMBLY GREEN YELLOW SCREENING CABLE DISPLAY MOULDING ASSEMBLY 106122 Rev A 10 96 20 4 ASSEMBLY DISASSEMBLY 14 WAY JUMPER TO
36. out of range readings a series of steps should be taken a Visually inspect the whole electrode area for signs of KC1 leakage Remove the electrodes and ensure that no leaks have occurred resulting in alternative Examine the electrode contact for signs of conductive paths for signals corrosion 106122 Rev A 10 96 36 TROUBLESHOOTING Electrode problems cont d 5 5 b c d e Remove any bubbles from the Reference Electrode This can be done by tapping or shaking the electrode to manipulate the air bubble into the cassette chamber The bubble can also be removed by unscrewing the nafion inner by means of the small hexagonal tool in the electrode box and allowing the KC1 solution to flow up and displace the bubble If the previous two steps are unsuccessful and the pH and electrolyte have sufficient fill solution in them then deproteinizing and conditioning should be carried out see Section 4 6 of the Instruction Manual Note After deproteinizing and conditioning the electrodes may take up to 2 hours to return to stable operation The troubleshooting option 31 should be used to determine if the electrodes are performing within specification see Section 5 7 of the Instruction Manual Large negative millivolt readings are usually indicative of bubbles in the reference electrode If the test results indicate satisfactory electrode performance and the standardization of the instrument is persisten
37. p 2 966 Off Off Off Off Off Off Off 2 966 Off Off Off Off Off Off Off 2 966 Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off EE Note For step 5 see section 7 2 4 106122 Rev A 10 96 SD2 detects LE 7 HYDRAULICS 7 2 4 Sample Wash Sequence Step Action Pumps Solenoids End State Sample Reagent VI IV2 V3 v4 VS V6 1 WashProbe Off 7 523 On Off Off Off Off Off 1 5Secs 2 Clear Block 7 523 Off Ofr off off ofr ofrjoff 4Secs 3 Prime Wash 7 523 7 523 On Off Off Off Ofr Ofr 1 LE or 8 Secs 4 Clear Block 7 523 Off Ofr off off ofr offjoff 4Secs 5 Refresh Slope 7 523 7 523 ofrjofr ofr ofrjoff On 0 5Secs 6 Clear Block 7 523 7 523 Ofr off off ofr offjoft 1Sec 7 Refresh Cal 7 523 7 523 Off Off Off Off On Ofr 0 5Secs 8 Clear Block 7 523 7 523 Off off off off offjoff 2Secs 9 Wash 7 523 7 523 On oOff off Off off ofr 0 5Secs 10 Air 7 523 7 523 ofrjofrjofr ofr off off 05Secs 11 16 Repeat steps 9 10 3 times oe 17 Wash 7 523 7 523 On off off Off ofr ofr 0 5Secs 18 Clear Block 7 523 Off On OffjOff OffJOft Off 18ec 19 Clear Wash 7 523 2 025 On Off Off Off Off Off 2Secs 20 VentSlope Gas Off Off Off On Off On Off Off 4Secs 21 Clear Block 2 025 Off Off On OfEj On JOff OfE 1
38. re 8 Measure 2 749 Off _ Off Off On Off Off Off End of Measure 106122 Rev A 10 96 7 HYDRAULICS 7 2 14 Gas Slope Sequence Step Action Pumps Solenoids End State Sample Reagent VI IV2 V3 V4 VS V6 Remove Gas 7 523 Off OfOfOfOflomon 10Secs 1 2 Vent Slope Gas Off Off Off On Off On Off off 5 Secs 3 Prime Slope Gas Off Off Off Off On On Off Off 5 Secs 4 Aspirate Gas 2 749 Off Off Off On On Off Off End of Measure 5 Measure 2 749 Off Off Off On On Off Off End of Measure Step Action Pumps Solenoids End State Sample Reagent VI IV2 V3 V4 VS Vp 1 Clear Block 7 523 Off OfflOffofofloflof 4Secs 2 Prime Slope 7 523 7 523 OffOfflOff OfflOffOn 0 5Secs 3 Clear Block 7 523 7 523 Ofr off offjofrjoffjoff 1sec 4 Prime Cal 7 523 7 523 Off Off Off Off On Off 3 LEs or 5 Secs 5 Clear Block 7 523 7 523 Off Off Off Off Off Off 6 TEs or 6 Secs 6 Aspirate Air 7 523 7 523 Off Off Off Off off off 1 sec 7 Prime Wash 7 523 7 523 On Off Off Off Off Off 1 LE or 8 Secs 8 Wash 7 523 7 523 On Off Off Oft OffJOfE 0 5Secs 9 Air 7 523 7 523 Off off off ofr offjofr 0 5Secs 10 13 Repeat steps 8 9 2 times 14 Clear Block 7 523 Off Onjoffjofrjoffjoffjoff 1Sec 15 Clear Wash 7 523 2 025 On Off Off Off Off Offj 2Secs 16
39. t hand corner of the manifold will deliver reagent in the following sequence Centre port delivers cal buffer Right port delivers slope buffer Left port delivers wash The gas paths can be checked by using the Run cal gas and Run slope gas routines in the troubleshooting option 313 and 314 After the initial pre cal wash has taken place and the sample pump is rotating slowly the probe can be opened and the probe tip inserted into liquid a used QC ampoule is appropriate A stream of bubbles can be observed emanating from the tip of the probe Turning off the gas at the gas bottle and checking that the gas flow ceases will determine that the correct gas is being delivered into the electrode block Certain pump tube failures are obvious eg tubes splitting If however the failure is as a result of reduced flow rate in one of the tubes due to wear or blocked filters then it will not be so obvious Utilising the Run cal and slope buffers in the Troubleshooting option 311 and 312 and inspecting what occurs at the T junction in the pre heater will give some good indications of pump tube condition When the buffers are pumped into the block via the T junction more solution is delivered than the sample pump will take away This results in some flow back from the T junction towards the sample probe If this flow back does not happen or is minimal then the pump tubes will need changing 5 6 System re starts The 348 software con
40. tinually checks its own internal data store in case of corruption It also monitors the incoming power status to achieve controlled recovery from intermittent power interruption brown outs etc Dependent on the condition under which the breakdown occurred the 348 will re start in a number of different ways 106122 Rev A 10 06 38 TROUBLESHOOTING 5 6 1 5 6 2 Cold start Conditions under which this will occur First time power up Power up with new CPU board Power up with failed on board battery Power up with reset button held in The reset button is located between the two data ports on the rear panel it must be held in until a double beep is heard Status on restart All settable options reset to default values except factory set pO2 channel offset Sample and QC number set to zero Calibration will be two 2pt calibrations 10 minutes apart once the system has achieved operating temperature Tepid start a When powered up with a new version of software in which significant change has been made eg default correlation factors changed Status on restart All settable options reset to default with the following exceptions BP calibration Sample number Real time clock ID number Service telephone number Language A 2pt calibration will be forced Hct slope will be prompted b Conditions under which this will occur When powered up with a new version of software in which no significant change has happened
41. tion 4 3 the gas cartridges and restrictor tubing as described in section 4 4 Remove the strengthening bar on the gas chassis by undoing the four screws which retain it This gives access to the four screws holding the gas cartridge moulding in place Remove the four screws holding this moulding in place at this end remove the two screws underneath the regulators holding the cartridge moulding assembly to the base strut at the end Pull the top of the moulding backwards and out from where it is retained by the main moulding Slide the moulding out far enough to give access to both regulator pressure switch cables Remove the required assembly by undoing the three retaining screws holding it in place on the gas cartridge moulding 106122 Rev A 10 96 15 4 ASSEMBLY DISASSEMBLY 106122 Rev A 10 96 16 4 ASSEMBLY DISASSEMBLY MAGNETIC SCREWORIVER 106122 Rev A 10 96 17 ASSEMBLY DISASSEMBLY 4 6 To replace the CPU board Parts required CPU board Cat No 106195 Power down the 348 First remove the rear panel and the PSU board as described in section 4 3 Remove the memory card from its slot beneath the rubber seal on the top of the display moulding Remove the six screws retaining the display printer keypad CPU sub assembly Remove the printer paper from the printer and slide the printer cradle and cover up to remove them Raise the instrument cover to the upright position Pull the sub assembly forward away fr
42. tly failing then the problem is probably hydraulic Frequent occurrences of unstable readings can be due to bad earth connections to the electrode block door Continuity between the main earth stud on the base plate and the electrode door should be checked N B The door must remain closed in normal operation Hydraulic problems The main causes of hydraulic problems are leaks blockages solenoid failure or pump tube failure Various techniques can be utilised in checking for the different hydraulic problems Leaks These will generally be visually evident In the case of small leaks crystal build up in the area of the leak will occur Blockages The symptoms which could indicate a blockage would be the failure of liquid to be present as expected during a hydraulic cycle ie sample not being aspirated during a sample cycle pH buffer not being delivered to the electrode block during calibration If a blockage is suspected then the techniques for clearing blockages described in section 4 22 of the operators manual should be used 106122 Rev A 10 96 37 TROUBLESHOOTING Hydraulic problems cont d Solenoid failure Pump tube failures In order to check for solenoid failure the different fluidic paths need to be checked out One method of doing this is to remove the grey connector which connects the manifold to the pre heater tubing assembly Initiate a prime sequence 23 The three ports at the top lef

348 pH/Blood Gas/Electrolytes/ Haematocrit/Analyzer

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