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Puritan Bennett GoodKnight 425, Service Manual

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Puritan Bennett GoodKnight 425 Service Manual Download Page 21

          3) Pressure measurement chain 

          4) Flow measurement chain 

P/N: M-145MAT00-20  

Rev. A - 

Page Rev.A

 

II-7 

Pressure

Sensor

Filter RC

Lowpass

Fc = 152 Hz

Follower

µC

MASTER

and

MOTOR

Patient
Tube

Flow

Flow

Sensor

Amplifier

differential

G = 40

Offset

Adjustment

Gain

Adjustment

Linearity

Filter

Hightpass

fc = 7,23 Hz

Filter

Lowpass

fc = 0,17Hz

P42

µC

MASTER

and

MOTOR

P43

P45

Flow filtered

Direct Flow

 

GoodKnight 425 / 425ST                                                                         S

ervice Manual

 

 

Summary of Contents for GoodKnight 425

Page 1: ...GoodKnight 425 SERVICE MANUAL GoodKnight 425ST P N M 145MAT00 20 Revision A...

Page 2: ......

Page 3: ...r reproduced in part or in full by anyone other than NELLCOR PURITAN BENNETT Inc with out prior written agreement and no right is granted to divulge or use any information contained in this document C...

Page 4: ...not be ap plicable to future models DEFINITION OF STATEMENTS Statements in this manual preceded by the followings words are of special significance WARNING Means there is the possibility of injury or...

Page 5: ...ual P N M 145MAT00 20 revision A Revision Description Date A 05 2004 Effective Pages Revision Effective Pages Revision All pages A Initial Release GoodKnight 425 425ST Service Manual P N M 145MAT00 20...

Page 6: ...resistance I 4 B USING A HUMIDIFIER I 4 C SYMBOLS I 5 D CLEANING INSTRUCTIONS I 6 1 GoodKnight 425 425ST I 6 2 Air filter I 6 E DISPOSAL OF THE DEVICE AT THE END OF ITS LIFETIME I 6 II THEORY OF OPER...

Page 7: ...tion of the Flow measurement chain III 8 5 d Verification of the ramp III 9 5 e Verification of the backup frequency 425ST only III 9 6 Performance Verification with keypad III 10 6 a Verification of...

Page 8: ...GoodKnight 425 425ST Service Manual P N M 145MAT00 20 Rev A Page Rev A 6...

Page 9: ...I GENERAL INFORMATION GoodKnight 425 425ST Service Manual P N M 145MAT00 20 Rev A Page Rev A I 1...

Page 10: ...4 0 to 1 0 5 in 1 0 5 increment Setting restrictions The maximum duration of the IPAP pressure is limited to 3 sec onds Consequently certain combinations of frequency rise time and I E ratio will be...

Page 11: ...ondensing Operating temperature 5 C to 40 C Operating humidity between 15 and 95 non condensing Operating relative pressure 700 hPa to 1060 hPa approximately up to altitude of 7874 ft 2 400 m 4 Physic...

Page 12: ...urer s recommendations for the humidi fier before use WARNING Using a humidifier can alter the performance of the GoodKnight 425 425ST WARNING The GoodKnight 425 425ST must always be placed above the...

Page 13: ...ructions before using this unit On Off Access to settings Ramp RS 232 Increase or decrease the adjust ment values Device protected against the ver tical falls of water drops Federal law restricts this...

Page 14: ...completely before reinstalling Replace filter if worn or damaged E DISPOSAL OF THE DEVICE AT THE END OF ITS LIFETIME In order to preserve the environment the various parts of the device and its acces...

Page 15: ...II THEORY OF OPERATION P N M 145MAT00 20 Rev A Page Rev A II 1 GoodKnight 425 425ST Service Manual...

Page 16: ...Master BusyI2CMotor Backlight Set up Battery Microcontroler C508 Motor driver Power Driver Blower otection ltering ulation 5V Current Measurement Pressure Sensor RTC RAM 56 octets Patient Interfac Air...

Page 17: ...AP BiLevel with and without backup frequency GK425 in CPAP BiLevel without backup frequency Monitors pressure respiratory rate I E ratio and compliance Adjusts inspiration and exhalation flow triggere...

Page 18: ...above 95 C 5 C during 10 seconds 6 Rise time rt The rise time between EPAP and IPAP can be set from about 300ms 10 cmH2O to about 600ms 10 cmH2O This rise time is adjustable on a scale of 1 to 5 1 300...

Page 19: ...Power AC 13Vcc 4A Serial Link 1 1 2 Power Supply 1 1 3 AC External Power Supply External Module AC DC 100 264 Vac 1 1 1 1 13Vcc 24W Interface Serial Link Protection and Filtrage Moteur Driver Blower...

Page 20: ...icro Motor GoodKnight 425 425ST Service Manual Motor Bridges MOSFET Interfaces C MOTOR P12 CC0 P13 COUT0 P14 CC1 P15 COUT1 P16 CC2 P17 COUT2 Data Memory SRAM 64 ko CS WE OE C MASTER P51 Reset WR RD Vc...

Page 21: ...or Filter RC Lowpass Fc 152 Hz Follower C MASTER and MOTOR Patient Tube Flow Flow Sensor Amplifier differential G 40 Offset Adjustment Gain Adjustment Linearity Filter Hightpass fc 7 23 Hz Filter Lowp...

Page 22: ...AT00 20 Rev A Page Rev A II 8 5 Temperature measurement 6 Serial Link PC Tx Rx C MASTER P30 RxD P31 TxD Interface RS232 Connector RS232 Blower CTN Linearity Follower C Master GoodKnight 425 425ST Serv...

Page 23: ...III SERVICE AND REPAIR GoodKnight 425 425 ST Service Manual P N M 145MAT00 20 Rev A Page Rev A III 1...

Page 24: ...e servicing any component WARNING After a component has been serviced the unit must be calibrated and the overall system operation checked according to the Performance Verification section before the...

Page 25: ...25ST system is operating within specification During this verification the following parameters will be tested Pressure accuracy Flow measurement chain Ramp and starting ramp pressure Back up frequenc...

Page 26: ...chain P N M 145MAT00 20 Rev A Page Rev A III 4 Figure 3 2 Calibrated output M BH0210 Figure 3 1 Pressure meter PTS 2000 P N 4 076185 00 Patient tube M 261000 27 Test Kit with 4 mm leak P N M 212430 0...

Page 27: ...page III 4 Connect the GoodKnight 425 425ST to your PC Open the Silverlining 3 software The following menu appears The following display appears Click on CPAP or BiLevel connection GoodKnight 425 425...

Page 28: ...he following screen appears Alt F9 Control Press the three following keys of your computer keyboard simultaneously P N M 145MAT00 20 Rev A Page Rev A III 6 GoodKnight 425 425 ST Service Manual Note In...

Page 29: ...lick on the button 25 cmH2O and verify that the pressure meter is reading 25 cmH2O 0 5 Click on the button 3 cmH2O and verify that the pressure meter is reading 3 cmH2O 0 5 Click on the button Storage...

Page 30: ...age If the value read is within specification go to step 2 If the value reading is not within specification perform the calibration of the flow sensor described page III 20 Do not go to the step 2 Ste...

Page 31: ...in 10 cycles one cycles per minute The performance verification of the unit is now ended Click on the EXIT button to leave of the technical menu The unit will retrieve its previous settings settings b...

Page 32: ...cmH2O with the two keys op posite then press the following key 5 Select EPAPA 14 cmH2O with the two keys opposite then press the following key 6 Press the opposite key as many times as nec essary to...

Page 33: ...ing 14 cmH2O 11 Record the selected value by pressing the hidden key keeping it depressed and pressing the access key 12 Go to points 2 to 5 and select EPAP IPAP 20 cm H2O Check the measured value on...

Page 34: ...po site 8 Press the key opposite for the display shown opposite to appear start ramp pressure set mode XX is the pressure value to set 9 Select the start pressure to 8 cmH2O with the two keys opposite...

Page 35: ...on one of the two keys opposite to set F 10 and press on the following key 4 Select P 14 cmH2O with the two keys oppo site and press on the following key 5 Select P 8 cmH2O with the two keys oppo site...

Page 36: ...Start ramp pressure 3cmH2O I E Ratio 1 2 0 425ST only Inspiratory sensitivity SI 5 Expiratory sensitivity SE 5 Rise time rt 3 Patient reference R last 7 numerals of the serial number Inventory number...

Page 37: ...he base of the device The manufacturer is not responsible for any fraudulent use that might result from modification of the serial number 9 Service hour meters The GoodKnight 425 425ST has two additio...

Page 38: ...ur value is ready to be adjusted 2 Adjust the hours with the two keys opposite 3 Press the key opposite to adjust the minutes The display shown opposite appears The letters min flash and the minute va...

Page 39: ...P N M 145MAT00 20 Rev A Page Rev A III 17 Personal Notes GoodKnight 425 425 ST Service Manual...

Page 40: ...t sealed with a stopper fitted with a 4 mm diameter leak figure 3 1 page III 4 NOTE The calibration pressure mode is accessed via the keypad The pressure calibration can be also performed by computer...

Page 41: ...al Menu of the software Silverlining procedure described III 7 or with the keypad procedure described page III 10 P N M 145MAT00 20 Rev A Page Rev A III 19 NOTE The pressure calibration with the keypa...

Page 42: ...sassembly section page III 22 2 Locate on the MCU board the trimmers TR3 and TR4 3 Realise the test set up figure 3 1 page III 4 4 Connect the unit to the computer 5 Follow the steps described page II...

Page 43: ...5 Adjust TR3 for a Value Valeur reading of 0 l s 0 05 Value of Flow in the Flow D bit menu 6 Leave the calibrated output free and adjust TR4 for a Value Valeur reading of 1 2 l s 0 05 7 Block again t...

Page 44: ...425 425ST BiLevel System is electrically powered To prevent serious injury or death follow standard safety procedures Ensure that power has been disconnected from the unit before servicing any compone...

Page 45: ...P N M 145MAT00 20 Rev A Page Rev A III 23 Top Housing Bottom Housing Internal Frame assembly Inlet baffle foam GoodKnight 425 425 ST Service Manual...

Page 46: ...ST is not near any source of heat Remove the tube from under the covers Call your Technical Support The GK425 GK425ST does not switch on no display Check that the external power supply module is cor r...

Page 47: ...he tube is not pinched or blocked Call your Technical Support In 03 is displayed There is a drop in power Check the connection between the external power module the power cable and the de vice Check t...

Page 48: ...from all electrical sources for a few sec onds and try again If the message persists change the internal frame assembly see page III 22 Er10 Power limit reached Unplug the unit from all electrical sou...

Page 49: ...same as the return number CODE DESCRIPTION ACTION CORRECTIVE Er18 Problem with link between motor micro controller and memory Unplug the unit from all electrical sources for a few sec onds and try aga...

Page 50: ...P N M 145MAT00 20 Rev A Page Rev A III 28 Personal Notes GoodKnight 425 425 ST Service Manual...

Page 51: ...IV SPARE PARTS GoodKnight 425 425ST Service Manual P N M 145MAT00 20 Rev A Page Rev A IV 1...

Page 52: ...nd electronic board factory set Inlet baffle foam not included M 314560 01 Internal frame assembly 425ST equipped with blower and electronic board factory set Inlet baffle foam not included M 413950 0...

Page 53: ...Lot Serial Reconfiguration 1 Yes No Verification of the serial in the memory 1 Surround the good answer Fill with a value Calibrations and tests 145FDS002 0 SERIAL CUSTOMER RETURN REPORTING DATE Comp...

Page 54: ...ackup Frequency 425ST Setting F 10 IPAP 14 EPAP 8 I E 1 1 0 Measured Frequency Pressure 3 cmH2O set c measured 14 cmH2O set c measured 25 cmH2O set c measured cmH2O cmH2O cmH2O PERFORMANCES VERIFICATI...

Page 55: ...GoodKnight 425 425ST Service Manual P N M 145MAT00 20 Rev A Page Rev A...

Page 56: ...ht 425 425ST Service Manual P N M 145MAT00 20 Rev A Page Rev A MALLINCKRODT DEVELOPPEMEN FRANCE Parc d Activit s du Bois St Julien 10 all e Pelletier Doisy 54601 VILLERS LES NANCY CEDEX T l 33 0 3 83...

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