Giraffe Incubator Used Hospital Medical Equipment

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The information contained in this service manual pertains only to those models of products which are marketed by. Ohmeda Medical as of the effective date of this manual or the latest revision thereof This service manual was pre. pared for exclusive use by Ohmeda Medical service personnel in light of their training and experience as well as the. availability to them of parts proper tools and test equipment Consequently Ohmeda Medical provides this service. manual to its customers purely as a business convenience and for the customer s general information only without. warranty of the results with respect to any application of such information Furthermore because of the wide va. riety of circumstances under which maintenance and repair activities may be performed and the unique nature of. each individual s own experience capacity and qualifications the fact that a customer has received such informa. tion from Ohmeda Medical does not imply in anyway that Ohmeda Medical deems said individual to be qualified. to perform any such maintenance or repair service Moreover it should not be assumed that every acceptable test. and safety procedure or method precaution tool equipment or device is referred to within or that abnormal or. unusual circumstances may not warrant or suggest different or additional procedures or requirements. This manual is subject to periodic review update and revision Customers are cautioned to obtain and consult the. latest revision before undertaking any service of the equipment. CAUTION w Servicing of this product in accordance with this service manual should never be undertaken in. the absence of proper tools test equipment and the most recent revision to this service manual. which is clearly and thoroughly understood, This static control precaution symbol appears throughout this manual When this symbol appears next. to a procedure in this manual static control precautions MUST be observed Use the static control work. station Stock No 0175 2311 000 to help ensure that static charges are safely conducted to ground. and not through static sensitive devices,Technical Competence. The procedures described in this service manual should be performed by trained and authorized personnel only. Maintenance should only be undertaken by competent individuals who have a general knowledge of and experi. ence with devices of this nature No repairs should ever be undertaken or attempted by anyone not having such. qualifications Genuine replacement parts manufactured or sold by Ohmeda must be used for all. repairs Read completely through each step in every procedure before starting the procedure any exceptions may. result in a failure to properly and safely complete the attempted procedure. Definitions, Note A note provides additional information to clarify a point in the text. Important An Important statement is similar to a note but is used for greater emphasis. CAUTION A CAUTION statement is used when the possibility of damage to the equipment exists. WARNING A WARNING statement is used when the possibility of injury to the patient or the operator exists. m Type B Electrical equipment,x Protective ground,y Functional Ground. Alternating Current AC,Static Control Precaution,European Union Representative.
Table of Contents,Chapter 1 Functional Description. 1 1 Control Board 1 1,1 2 Relay Board 1 3,1 3 Display Driver Board EL Display 1 4. 1 4 LED Board 1 4,1 5 Power Supply 1 4,1 6 Peripheral Components 1 4. 1 7 Datalink option 1 5,1 8 Servo Controlled Oxygen 1 6. Chapter 2 Service Checkout,2 1 Mechanical checks 2 1.
2 2 Controller checks 2 2,2 3 Humidity check 2 3,2 4 Servo controlled oxygen check 2 3. 2 5 Accessory checks 2 4,2 6 Cable Connections and Mechanical Controls 2 5. Chapter 3 Calibration and Maintenance,3 1 Maintenance Schedule 3 1. 3 2 Special Tools 3 1,3 3 System Calibration 3 3,3 4 Line Voltage Calibration 3 3. 3 5 Humidifier calibration 3 4,3 6 Servo Controlled Oxygen calibration 3 4.
3 7 Scale Calibration 3 5,3 8 Leakage Current 3 5,3 9 Ground Resistance Check 3 5. Chapter 4 Troubleshooting,4 1 Service Screen 4 1,4 2 Alarm Messages 4 5. 4 3 Error Codes 4 7,4 4 Troubleshooting Table 4 11. 4 5 Additional Troubleshooting Tips 4 15,4 6 Servo Controlled Oxygen 4 15. 4 6 1 Servo Controlled Oxygen Service Screen 4 15,4 6 2 Servo Controlled Oxygen Messages 4 16.
4 6 3 Servo Controlled Oxygen Tips 4 18,Chapter 5 Repair Procedures. 5 1 Hood removal for replacement 5 1,5 1 1 Porthole door replacement 5 1. 5 2 Uprights and End caps 5 2,5 3 Compartment Probe repairs 5 3. 5 4 Lower Unit Repairs 5 4, 5 4 1 Removing the chassis cover with the storage door in place 5 4. 5 4 2 Incubator fan motor optical sensor 5 5,5 4 3 Cartridge heater replacement 5 5.
5 4 4 Elevating base 5 6,5 4 5 Chassis replacement 5 8. 5 4 6 Elevating footswitch 5 9,5 4 7 Humidifier Repairs 5 9. 5 5 Bed Tilt Brake Shoe Replacement 5 12,5 6 Castor Replacement 5 12. 5 7 Controller and Display Module repairs 5 13,5 7 1 Display module 5 13. Table of Contents,5 7 2 Probe panel 5 14,5 7 3 Controller components 5 14.
Control Board 5 14,Relay Board 5 15,Solid State Relay 5 15. Power Supply 5 15,Battery 5 16,Toroidal Transformer 5 16. Circuit breakers power switch and outlets 5 16, 5 8 Servo Controlled Oxygen Service Procedures 5 16. 5 8 1 Installing oxygen sensors 5 16,5 8 2 Replacing the vent screen 5 17. 5 8 3 Sensor housing repairs 5 17,5 8 4 Valve housing repairs 5 18.
5 8 5 Servo O2 board repairs 5 19,Chapter 6 Illustrated Parts. 6 1 Exploded Views 6 1, 6 1 1 Probe housing display module and electrical enclosure 6 1. 6 1 2 Bed and side doors 6 8,6 1 3 Hood and Compartment Probe 6 13. 6 1 4 Chassis 6 14,6 1 5 Humidifier 6 18,6 1 6 Elevating base 6 20. 6 1 7 Hood latch wire covers and uprights 6 22,6 1 8 Servo controlled oxygen 6 24.
6 1 9 Accessory hangers shelves and drawers 6 28,6 2 Accessories 6 34. 6 3 Labels 6 35,6 4 PCB layouts 6 38,6 5 Wiring diagrams 6 42. Compartment and Skin Probe Characteristics A 1,Specifications A 2. RS 323 Serial Data A 4,List of Figures,1 1 Block Diagram 1 2. 2 1 Cable connections and mechanical controls 2 5,3 1 Control board test points 3 2.
4 1 First service screen 4 1,4 2 Second service screen 4 2. 4 3 Status menu 4 2,4 4 Switch diagnostic diagram 4 3. 4 5 First service screen diagnostics 4 4,4 7 Servo Controlled O2 service screen 4 15. 5 1 Hood 5 1,5 2 Uprights and endcaps 5 2,5 3 Compartment probe 5 3. 5 4 Bed disassembly 5 4,5 5 Fan motor 5 5,Table of Contents.
5 6 Heat sink and fan 5 6,5 7 Elevating base 5 7,5 8 Chassis bottom cover 5 8. 5 9 Humidifier parts 5 10,5 10 Replacing the tilt brake 5 12. 5 11 Display module 5 13,5 12 Probe panel 5 14,5 13 Electronics enclosure 5 15. 5 14 Installing sensors 5 17,5 15 Sensor housing 5 18. 5 16 Valve housing 5 19,6 1 Probe Panel Assembly 6 1.
6 2 Display Module 6 3,6 3 Electrical enclosure 6 5. 6 4 Humidifier Transformer ad RS232 option 6 7,6 5 Bed 6 9. 6 6 Side door E W 6 11,6 7 Flip door corner brackets and grommets 6 12. 6 8 Compartment Probe 6 13,6 9 Upper chassis and heat sink 6 15. 6 10 Lower chassis 6 17,6 11 Humidifier 6 19,6 12 Base and elevating column 6 21.
6 13 Hood latch and wire covers 6 22,6 14 Uprights and End caps 6 23. 6 15 Servo Control O2 sensor housing assembly 6 24. 6 16 Servo Control O2 valve housing 6 25,6 17 Expansion Chamber heatsink vent 6 26. 6 18 Servo Control O2 cooling fan 6 26,6 19 Servo Control 02 PC Board 6 27. 6 20 Drainage hangers and DIN rail 6 28,6 21 Storage Drawer 6 29. 6 22 Instrument Shelf 6 30,6 23 Monitor Shelf 6 30.
6 24 E Cylinder holder 6 31,6 25 Tubing management arm 6 31. 6 26 Dovetail mount DIN rail 6 32,6 27 Silo support assembly 6 32. 6 28 Rotating IV Pole assembly 6 33,6 29 Dovetail extension 6 34. 6 30 Control board 6 38,6 31 Display driver board 6 39. 6 32 Relay board Rev 10 or higher 6 40,6 33 Relay board Rev 9 or lower 6 41.
6 34 Wiring Diagram Control Board 6 42,6 35 Wiring Diagram Elevating Base 6 43. 6 36 Wiring Diagram Electrical Enclosure 6 44,6 37 Wiring Diagram Graphics Display 6 45. 6 38 Wiring Diagram Incubator Heater Relay Board Rev 10 or higher 6 46. 6 39 Wiring Diagram Incubator Heater Relay Board Rev 10 or higher 6 47. 6 40 Wiring Diagram Incubator Fan Sensor 6 48, 6 41 Wiring Diagram Servo Humidifier Relay Board Rev 10 or higher 6 49. 6 42 Wiring Diagram Servo Humidifier Relay Board Rev 9 or lower 6 50. 6 43 Wiring Diagram Servo Control Oxygen 6 51,Precautions. Before using the Giraffe Incubator read through the entire operator s manual As with all medical equip. ment attempting to use this device without a thorough understanding of its operation may result in patient or. user injury This device should only be operated by personnel trained in its operation under the direction of. qualified medical personnel familiar with the risks and benefits of this type of device Additional precautions. specific to certain procedures are found in the text of this manual. Complete the Pre operative Checkout Procedures section of the Operator s manual before putting the unit. into operation If the incubator fails any portion of the checkout procedure it must be removed from use and. Do not use the incubator in the presence of flammable anesthetics an explosion hazard exists under these. conditions, Always disconnect the power before performing service or maintenance procedures detailed in this manual.
Apply power only if you are specifically instructed to do so as part of the procedure. Thoroughly air dry the incubator after cleaning it with flammable agents Small amounts of flammable agents. such as ether alcohol or similar cleaning solvents left in the incubator can cause a fire. Only competent individuals trained in the repair of this equipment should attempt to service it as detailed in. this manual, Detailed information for more extensive repairs is included in the service manual solely for the convenience of. users having proper knowledge tools and test equipment and for service representatives trained by Ohmeda. Chapter1 Functional Description, This functional description is divided into four sections representing each of the four boards The reader. should also reference the block diagram and wiring diagram when studying this section. 1 1 Control Board, The Intel 80C188EC microcontroller is an enhanced X86 processor with many on board peripheral features. such as a interrupt controller DMA controller peripheral chip select driver programmable timers etc The two. programmable timers are used to control the two heaters bed and radiant The input to these timers is line. frequency This allows the control signal to be synchronized with the line frequency to better control the zero. crossing solid state relays The on board interrupt controller has several interrupts analog to digital converter. ADC conversion ready signal overtemperature comparator output watchdog output power fail signal and. module interrupt signal from the system data bus The microcontroller external bus is a multiplexed address. and data bus, The system memory consists of a programmable read only memory PROM and static random access mem. ory SRAM The EEPROM is used for calibration values and infrequently changing variables This memory. holds the data even after power is turned off, The RS 485 integrated circuit converts the RS 232 TTL signals from the microcontroller to RS 485 signals for.
the bus This bus is the main communications bus from the control board to all other boards with processors. There are two isolation transceivers used to isolate the circuits powered by 5V and the circuits powered by. 5VSTBY battery backup, The board contains a 16 channel multiplexer There are seven temperature measurement channels These. channels measure the two patient probes with two thermistors each the two air temperature thermistors used. for display and control and an additional thermistor used to measure the heat sink temperature. Additional channels include the humidity sensor RHIN LINE COMP LINE COMP2 5 Volts Motor current. Vthref VDAC and 1 2Vind, Attached to the environmental probe connection is the relative humidity signal conditioning circuitry The 1V. reference that is used for the analog circuitry is also the maximum input voltage and the offset voltage for the. ADC This yields a purely ratiometric system, The overtemperature circuit compares the air temperature to a reference level generates an interrupt and. turns off the heat if the air temperature is higher than the reference level The overtemperature circuit requires. varying its voltage levels to accommodate various thermistor measurements This is because the calibration. is digital no potentiometer, The watchdog circuitry monitors the 80C188 microprocessor and monitors the 5V and 5VSTBY voltages It. generates the interrupt signal and power failure signal to the 80C188 microprocessors The audio circuit. includes a 8752 microcontroller that reads a wavetable located in a PROM and sends the table to a digital. audio circuit and amplifier The high priority HP and other alarm signal lines select an output at the correct. frequencies, Three OR gates are combined to generate the error signal The inputs to the circuit are overtemperature.
Giraffe Incubator Service Manual Important The information contained in this service manual pertains only to those models of products which are marketed by Ohmeda Medical as of the effective date of this manual or the latest revision thereof This service manual was pre pared for exclusive use by Ohmeda Medical service personnel in light of their training and experience as well as the

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