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Service Manual 

 

25 

 

Ventilator pneumatics - General description 

Figure 2-2 shows the schematic diagram of the BEAR CUB™ 750PSV Pneumatics 
System.  The pneumatics interface to the electronics is achieved using various 
actuators (solenoids) and transducers.  The Pneumatics System consists of eight (8) 
main subsystems:  Gas Inlet and Conditioning, Oxygen Blender System, Flow 
Control, Sub-Ambient/Overpressure Relief system, Exhalation Valve/Pressure 
Control, Pressure Monitoring, the Proximal Airway Purge System, and the Auxiliary 
Gas Outlet. 

 

Gas Inlet Conditioning 

Compressed air and oxygen sources, supplied in the pressure range of 30 to 80 
psig, are connected to the standard DISS male-threaded fittings on the back panel of 
the ventilator. 

Incoming air passes through a coalescing filter housed in the Air Inlet Water Trap.  
Particulate matter down to .3 micron in size, and aerosols down to .75 micron, are 
trapped.  Both gases, air and O2, pass through sintered metal filters. 

Supply pressures are monitored and displayed by the ventilator via pressure 
transducers and the system electronics.  The system will trigger an alarm if either Air 
or O

2

 pressure drops below 24(±2) psig, and the alarm will reset when the pressures 

are above 30 psig. 

From the Air Inlet Water Trap and internal filters, the air and oxygen enter the in-line, 
one way Check Valves which prevent flow from exiting through an inlet if that source 
is removed. 

Blender 

Air and O

2

 pressure are regulated to 17 psig and are balanced to each other for 

accurate blending of gases in the O

2

 blender. 

In the event of a failure of either of the supply gases, one of a pair of crossover 
check valves will open to permit continued operation.  Oxygen blending will not be 
maintained in this condition, and the patient gas flow and pressure may decrease, by 
less than 10%, depending on settings.  

To ensure accurate oxygen blending at low patient flow rates, a bleed valve 
maintains a minimum flow through the blender. 

Flow Control Valve 

Two flow control valves are switched by a solenoid valve to create Inspiratory and 
Base Flow. Each valve controls flow from 1 to 30 L/min.  Each flow control valve is 
geared to a potentiometer.  The potentiometer provides an electronic signal to the 
microprocessor; this flow is then displayed on the front panel corrected to set 
barometric pressure. 

L2346 

Revision B 

June 2004 

Содержание Bear Cub 750PSV

Страница 1: ...Service Manual Bear Cub 750PSV Copyright 2004 VIASYS Healthcare Critical Care L2346 Revision B June 2004 ...

Страница 2: ...50PSV Revision History Date Revision Pages Changes June 2003 A All Release June 2004 B All Release manual in VIASYS Healthcare template using VIASYS Healthcare Critical Care nomenclature L2346 Revision B June 2004 ...

Страница 3: ...Kingdom Sales Service and Clinical Support VIASYS Healthcare 3 Welton Rd Warwick CV34 5PZ Phone 01926 490888 Fax 01926 402262 Europe Sales and Customer Service Technical Service VIASYS Healthcare VIASYS Healthcare Critical Care Division Leibnizstrasse 7 22705 Savi Ranch Parkway D 97204 Hoechburg Yorba Linda CA 92887 Germany Phone 714 283 8444 Phone 49 0 931 4972 0 800 381 3552 Fax 49 0 931 4972 42...

Страница 4: ...e by or on the order of a physician CAUTION Not suitable for use in the presence of flammable anesthetics CAUTION Service and or repair of this instrument is restricted to VIASYS Healthcare authorized or VIASYS Healthcare Trained Personnel only L2346 Revision B June 2004 ...

Страница 5: ...im for breach of warranty other than the purchase price of any defective product covered hereunder The Company warranties as herein and above set forth shall not be enlarged diminished or affected by and no obligation or liability shall arise or grow out of the rendering of technical advice or service by the Company or its agents in connection with the Buyer s order of the products furnished hereu...

Страница 6: ...6 Bear Cub 750PSV L2346 Revision B June 2004 ...

Страница 7: ... Dimension and Shipping Information 20 Environmental Specifications 21 Method of Sterilization Disinfection 21 Cleaning 22 Sterilization 22 Chapter 2 Theory of Operation 23 Overview 23 Ventilator pneumatics General description 25 Gas Inlet Conditioning 25 Blender 25 Flow Control Valve 25 AOPR Valve Sub Ambient Valve Dump Solenoid 26 Auxiliary Gas Outlet 26 Pressure Control System 26 Exhalation Val...

Страница 8: ...equirements 41 Chapter 5 Schematics and Assemblies 45 Chapter 6 Troubleshooting 69 Chapter 7 Removal Replacement 73 Interior Access 73 Flow Valve Assembly Removal 74 Control PCB Removal 75 Display PCB Removal 76 Air O2 Regulator Removal 76 Blender Removal 77 Exhalation Valve Removal 78 Chapter 8 Preventive Maintenance 79 Replacement Parts 79 Recommended Service Procedure 79 Exterior Inspection 80 ...

Страница 9: ...ircuit 33 Figure 5 1 Power Supply Module Assembly 1 of 2 45 Figure 5 2 Power Supply Module Assembly 2 of 2 46 Figure 5 3 Schematic Diagram Pneumatic 750PSV 47 Figure 5 4 Power Supply PCB Assembly 1 of 3 48 Figure 5 5 Power Supply PCB Assembly 2 of 3 49 Figure 5 6 Power Supply PCB Assembly 3 of 3 50 Figure 5 7 Pneumatic Tubing Diagram 51 Figure 5 8 Display PCB 1 of 3 52 Figure 5 9 Display PCB 2 of ...

Страница 10: ... 5 23 BEAR CUB 750PSV Overlay P N 51 09640 00 67 Figure 6 1 Troubleshooting Decision Tree 69 Figure 7 1 Cover Removal 73 Figure 7 2 Standoff Tube Removal 74 Figure 7 3 Opening of Front Portion 74 Figure 7 4 Flow Valve Assembly 75 Figure 7 5 Control PCB 75 Figure 7 6 Display PCB 76 Figure 7 7 Air O2 Fittings 76 Figure 7 8 Air O2 Regulator Assembly 77 Figure 7 9 Oxygen Knob 77 Figure 7 10 Blender Re...

Страница 11: ...le 6 2 Troubleshooting 70 Table 9 1 Pin Assignment 83 Table 9 2 Alternate Pin Assignment 84 Table 9 3 Valid Requests Received by the Ventilator 85 Table 9 4 Valid Message Transmitted by the Ventilator 85 Table 9 5 Real Time Data 86 Table 9 6 Adult Ventilator Control Settings 87 Table 9 7 Adult Ventilator Alarm Settings Status 88 Table 9 8 Adult Ventilator Monitor Status 89 Table 9 9 Infant Ventila...

Страница 12: ...12 Bear Cub 750PSV L2346 Revision B June 2004 ...

Страница 13: ...s are spontaneous Disabling the assist sensitivity mechanism or removing the flow sensor from the ventilator will cause the equivalent of IMV mode of ventilation to exist CPAP In the CPAP position the Base Flow control establishes the continuous flow available for spontaneous breathing STANDBY The STANDBY position discontinues all electrical controls and functions with the exception of the chargin...

Страница 14: ...er is greater Pressure 60 to 72 cmH2O 0 5 L min or 10 15 of setting whichever is greater Baseline Flow Range 1 to 30 L min Resolution 0 5 L min from 1 to 10 L min 1 0 L min from 10 to 30 L min Accuracy Pressures 0 to 60 cmH2O 0 5 L min or 10 of setting whichever is greater Pressure 60 to 72 cmH2O 0 5 L min or 10 15 of setting Whichever is greater Volume Limit Range 5 to 300 ML Resolution 1 ML from...

Страница 15: ...0 5 at 5 0 L min Accuracy Not a calibrated scale minimum setting accuracy is 0 1 L min Over Pressure Relief Range Pressure at the patient wye 15 to 75 cmH2O Resolution 2 cmH2O stability repeatability 4 cmH2O 02 Blending Range 21 to 100 Oxygen concentration Resolution 1 Accuracy 3 oxygen APNEA Interval Range 5 10 20 or 30 seconds Accuracy 1 second Alarms Alarm Loudness Range Min to Max 60 to 75 db ...

Страница 16: ...w Gas Supply LED On Off Apnea LED On Off Settings Incompatible LED On Off Pressure Settings Incompatible LED On Off Prolonged Inspiratory Pressure LED On Off Flow Sensor LED On Off Low Battery LED On Off Alarm Silence 60 seconds Visual Reset Push Button High Pressure Limit Range 10 to 75 cmH2O L2346 Revision B June 2004 ...

Страница 17: ...n 0 20 L min from 10 to 30 0 L min Accuracy Accuracy of the exhaled minute volume is a function of both volume and breath rate To evaluate the performance of this monitor the accuracy of both tidal volume and breath rate must be combined Exhaled Tidal Volume Range 0 to 500 ML Resolution 0 1 ML from 0 0 to 99 9 ML 1 0 ML from 100 to 500 ML Accuracy 1 ML or 10 whichever is greater of Tubing Leakage ...

Страница 18: ...mH2O Accuracy 2 cmH2O or 5 of reading whichever is greater Mean Airway Pressure Range 0 to 75 cmH2O Resolution 0 5 cmH2O Accuracy 2 cmH2O or 3 of reading whichever is greater Inlet O2 Pressure Range 0 to 100 PSIG Resolution 1 PSIG Accuracy 5 PSIG Proximal Airway Pressure Range 10 to 100 cmH2O Resolution 1 cmH2O Accuracy 1 cmH2O from 10 to 20 cmH2O 2 cmH2O from 20 to 65 cmH2O 3 cmH2O from 65 to 100...

Страница 19: ... of Flammable Anesthetics None Mode of Operation Continuous Emissions Susceptibility This ventilator has been tested to conform to the following specifications MIL STD 461D 1993 MIL STD 462D 1993 EN55011 1991 IEC 1000 4 2 1994 IEC 1000 4 3 1994 IEC 1000 4 4 1994 IEC 1000 4 5 1994 QUASI STATIC 1993 This ventilator is designed and manufactured to comply with the safety requirements of IEC 601 1 IEC ...

Страница 20: ... 192 to 264 VAC Current 100V 1 0 A maximum 120V 1 0 A maximum 220V 0 5 A maximum 240V 0 5 A maximum Frequency 100V 50 60 Hz 120V 50 60 Hz 220V 50 60 Hz 240V 50 60 Hz Fuses 100 120V T 0 5 A 5 x 20 mm 230 240V T 0 25 A 5 x 20 mm For 220V operation set the power entry module selector switch to 230V setting Pneumatic Oxygen and Air 30 to 80 psig 50 L min Supply Ratings Physical Dimension and Shipping ...

Страница 21: ... Stand 25 W x 5 D x 45 H Compressor 26 W x 22 D x 40 H Environmental Specifications Temperature Storage and Shipping 40 to 158 ºF 40 to 70 ºC Checkout and Operating 50 to 104 ºF 10 to 40 ºC Altitude Checkout Operating Transport and Storage 0 to 9 000 feet 14 7 to 10 5 PSIA 760 to 543 mm Hg Humidity Storage and Shipping 0 to 99 Relative Humidity Non condensing Checkout and Operating 0 to 95 Relativ...

Страница 22: ... the ventilator shall be sterilizable or disposable Methods of Sterilization Ethylene oxide maximum temperature 130 ºF 54 ºC Steam sterilization maximum temperature 250 ºF 121 ºC Liquid Sterilization 1 Cidex Minimum sterilization cycles before part replacement 1 Patient Circuit Exhalation Manifold Ethylene Oxide 240 cycles Steam Sterilization 240 cycles Liquid Sterilization 240 cycles 2 Flow Senso...

Страница 23: ...as a micro processor controlled time cycled pressure limited dual flow neonatal pediatric critical care ventilator Breaths are initiated either by the ventilator controlled by patient activity assisted or by the operator manual The top level block diagram figure 2 1 graphically illustrates the overall structure of the ventilator Figure 2 1 Top Level Block Diagram L2346 Revision B June 2004 ...

Страница 24: ...24 Bear Cub 750PSV Figure 2 2 Pneumatics System Schematic L2346 Revision B June 2004 ...

Страница 25: ...nics The system will trigger an alarm if either Air or O2 pressure drops below 24 2 psig and the alarm will reset when the pressures are above 30 psig From the Air Inlet Water Trap and internal filters the air and oxygen enter the in line one way Check Valves which prevent flow from exiting through an inlet if that source is removed Blender Air and O2 pressure are regulated to 17 psig and are bala...

Страница 26: ...fore use of a manual resuscitation bag could be initiated if needed Pressure Control System The BEAR CUB 750PSV Infant Ventilator ventilates the patient between two pressure levels Positive End Expiratory Pressure PEEP and Peak Inspiratory Pressure PIP Inspiratory Pressure must always be above the PEEP pressure for ventilation to occur The PIP pressure is manually set by the user at a level of 0 t...

Страница 27: ...igger a breath based upon inspired flow The patient effort in L min required to initiate a breath can be adjusted 2 to 5 L min using the assist sensitivity setting The flow sensor also enables the ventilator to display on the front panel the percentage of endotracheal tube leak based upon inhaled and exhaled volume measurements The flow sensor operates on the principle of hot wire anemometry The h...

Страница 28: ...CB in order to keep the battery on continuous charge whenever the ventilator is plugged into an AC outlet Ventilator Software The BEAR CUB 750PSV Infant Ventilator is a shared processor system incorporating two Motorola 68HC11 microcontroller units MCU the Monitor and the Controller Each processor and thereby its software have specific and duplicated tasks Each processor is based on a 2 5 m sec ti...

Страница 29: ...such as a verification of the alarm circuits should be performed at least once every 24 hours that the unit is in clinical use Refer to the BEAR CUB 750PSV Infant Ventilator instruction manual for details Do not use the ventilator unless it passes all the steps in the Operational Verification Procedure Equipment Required Infant Test Lung P N 52000 40027 Patient Circuit P N 50000 01147 Oxygen Analy...

Страница 30: ...50 cmH2O Low Inspiratory Pressure Alarm 30 cmH2O High Breath Rate Alarm 40 BPM Table 3 2 Rate Set Rate Inspiratory Time Using stop watch verify Breath Rate 10 BPM 3 seconds 10 2 BPM 40 BPM 1 second 40 3 BPM 80 BPM 0 4 seconds 80 4 BPM 120 BPM 0 1 seconds 120 6 BPM Table 3 3 Exhalation Time and I E Ratio Table Rate Set Inspiratory time Verify Exhalation Time Verify I E Ratio 10 BPM 3 00 seconds 3 0...

Страница 31: ...se the tubing to rupture resulting in personal injury or property damage When verifying the operation of this medical device do not breathe directly from the machine Always use a fresh bacterial filter and test circuit A hazard to the health of the service person may result If any of the following procedures cannot be verified as outlined in this document do not use this device on a patient and re...

Страница 32: ...e to 40 cmH2O Push the Visual Reset button and verify that the Low Pressure and High Pressure LEDs are canceled 9 Occlude patient circuit limb going to the exhalation valve Verify that a prolonged inspiratory alarm occurs 10 Increase ventilator rate to 45 BPM Verify that the High Rate alarm activates 11 Decrease rate to 4 BPM Verify that the apnea alarm activates 12 Set ventilator rate to 70 BPM V...

Страница 33: ...assist sensitivity window is blank and that the monitored volume and volume limit displays show dashes Reconnect the flow sensor cable verify audible alarm cancels assist sensitivity window illuminates and volume digits return 23 Turn Assist Sensitivity to MIN Squeeze and release the patient circuit Verify that the unit will assist and that Patient Initiated LED is illuminating 24 Disconnect the p...

Страница 34: ...each patient use and as often as necessary to keep them clean Use only those cleaning materials that have been approved by your department Care should be exercised not to allow any liquid to penetrate the inside of the ventilator CAUTION Do not use cleaning agents that contain phenols ammonium chloride chloride compounds or more than 2 glutaraldehyde These agents may damage the ventilator s plasti...

Страница 35: ...n 21 60 100 High Pressure alarm Limit Verification Low PEEP CPAP alarm verification Pressure LED reset AC power loss verification Prolonged Inspiratory alarm verification Tidal Volume Limit verification High Rate alarm verification Flow Sensor alarm verification Apnea alarm verification Patient Triggering verification Incompatible setting alarm verification Alarm loudness verification Air Pressure...

Страница 36: ...36 Bear Cub 750PSV L2346 Revision B June 2004 ...

Страница 37: ...ithin the ventilator Always observe appropriate safety precautions when working on the ventilator while the machine is connected to an electrical power source to prevent possible accidental injurious electrical shock When high pressure gas sources are connected to the ventilator always use extreme caution when attempting to measure internal pressures Abnormal conditions may exist where measured pr...

Страница 38: ...bration Transducer Calibration Number Message Input Static Pressure Machine port B d00 nP00 0 cmH2O d01 nP40 40 0 2 cmH2O Differential port B d02 dP00 0 cmH2O d03 dP40 40 0 2 cmH2O Proximal port B d04 pP00 0 cmH2O d05 pP40 40 0 2 cmH2O O2 A2 d06 0P00 0 PSIG d07 0P40 40 0 2 PSIG AIR A1 d08 AP00 0 PSIG d09 AP40 40 0 2 PSIG NOTE The 40 cm psi settings were 70 cm psi prior to monitor firmware 511 0280...

Страница 39: ...piratory Flow Table 4 2 Calibration Transducer Calibration Number Message Input Static Pressure Differential port B d10 0 1 0 cmH2O d10 50 1 50 0 5 cmH2O Machine port B d11 0 1 0 cmH2O d11 50 1 50 0 5 cmH2O Proximal port B d12 0 1 0 cmH2O d12 50 1 50 0 5 cmH2O AIR A1 d13 50 2 50 0 2 PSI O2 A2 d14 50 2 50 0 2 PSI NOTE The pressure display occasionally flickering 1 digit beyond the tolerance is acce...

Страница 40: ...play airp 14 Display O2p 15 Display Set Altitude 16 Calibrate Base Flow 1 L min 17 Calibrate Base Flow 2 L min 18 Calibrate Base Flow 5 L min 19 Calibrate Base Flow 15 L min 20 Calibrate Base Flow 25 L min 21 Calibrate Base Flow 30 L min 22 Calibrate Insp Flow 1 L min 23 Calibrate Insp Flow 2 L min 24 Calibrate Insp Flow 5 L min 25 Calibrate Insp Flow 15 L min 26 Calibrate Insp Flow 25 L min 27 Ca...

Страница 41: ... feet 7000 feet 7500 feet 8000 feet 2 00 02 2 18 02 2 20 02 2 23 02 2 26 02 2 29 02 2 31 02 2 34 02 2 37 02 5 00 03 5 44 03 5 5 1 5 6 1 5 6 1 5 7 1 5 8 1 5 8 1 5 9 1 15 00 1 16 2 1 16 4 1 16 6 1 16 7 1 16 9 1 17 1 1 17 3 1 17 5 1 25 00 2 26 9 2 27 1 2 27 4 2 27 7 2 28 0 2 28 3 2 28 6 2 28 9 2 30 00 2 32 1 2 32 4 2 32 7 2 33 0 2 33 4 2 33 8 2 34 1 2 34 5 2 Air and O2 Regulator Balance Objective To ...

Страница 42: ...ain a pressure balance with the air regulator within 2 cmH2O Bleed Valve 60 With Base Flow Control Valve set to minimum Bleed Valve exhaust shall equal 3 5 5 5 L min Air Regulator 60 Increase Base Flow rate to maximum O2 Regulator Regulators shall remain balanced within 2 cmH2O Bleed Valve Bleed Valve Flow drops to less than 25 L min L2346 Revision B June 2004 ...

Страница 43: ...255 BPM Low Inspiratory Pressure Alarm 5 cmH2O High Pressure Limit Alarm 75 cmH2O FRONT OF VENTILATOR Humidifier VH 820 chamber no water Patient Circuit Standard Allied Infant Circuit Patient Resistance Rp 20 Patient Compliance C3 Endotracheal Tube None Auxiliary Pressure Relief Fully closed CW REAR OF VENTILATOR Alarm Loudness Control Minimum RS 232 Interface Open Analog Output Open Remote Nurses...

Страница 44: ...44 Bear Cub 750PSV L2346 Revision B June 2004 ...

Страница 45: ...Service Manual 45 Chapter 5 Schematics and Assemblies Figure 5 1 Power Supply Module Assembly 1 of 2 L2346 Revision B June 2004 ...

Страница 46: ...46 Bear Cub 750PSV Figure 5 2 Power Supply Module Assembly 2 of 2 L2346 Revision B June 2004 ...

Страница 47: ...Service Manual 47 Figure 5 3 Schematic Diagram Pneumatic 750PSV L2346 Revision B June 2004 ...

Страница 48: ...48 Bear Cub 750PSV Figure 5 4 Power Supply PCB Assembly 1 of 3 L2346 Revision B June 2004 ...

Страница 49: ...Service Manual 49 Figure 5 5 Power Supply PCB Assembly 2 of 3 L2346 Revision B June 2004 ...

Страница 50: ...50 Bear Cub 750PSV Figure 5 6 Power Supply PCB Assembly 3 of 3 L2346 Revision B June 2004 ...

Страница 51: ...Service Manual 51 Figure 5 7 Pneumatic Tubing Diagram L2346 Revision B June 2004 ...

Страница 52: ...52 Bear Cub 750PSV Figure 5 8 Display PCB 1 of 3 L2346 Revision B June 2004 ...

Страница 53: ...Service Manual 53 Figure 5 9 Display PCB 2 of 3 L2346 Revision B June 2004 ...

Страница 54: ...54 Bear Cub 750PSV Figure 5 10 Display PCB 3 of 3 L2346 Revision B June 2004 ...

Страница 55: ...Service Manual 55 Figure 5 11 Control PCB Assembly L2346 Revision B June 2004 ...

Страница 56: ...56 Bear Cub 750PSV Figure 5 12 Wiring Diagram L2346 Revision B June 2004 ...

Страница 57: ...Service Manual 57 Figure 5 13 Power Supply Schematic L2346 Revision B June 2004 ...

Страница 58: ...58 Bear Cub 750PSV Figure 5 14 Control Schematic PCB 1 of 5 L2346 Revision B June 2004 ...

Страница 59: ...Service Manual 59 Figure 5 15 Control Schematic PCB 2 of 5 L2346 Revision B June 2004 ...

Страница 60: ...60 Bear Cub 750PSV Figure 5 16 Control Schematic PCB 3 of 5 L2346 Revision B June 2004 ...

Страница 61: ...Service Manual 61 Figure 5 17 Control Schematic PCB 4 of 5 L2346 Revision B June 2004 ...

Страница 62: ...62 Bear Cub 750PSV Figure 5 18 Control Schematic PCB 5 of 5 L2346 Revision B June 2004 ...

Страница 63: ...Service Manual 63 Figure 5 19 Display Schematic PCB 1 of 4 L2346 Revision B June 2004 ...

Страница 64: ...64 Bear Cub 750PSV Figure 5 20 Display Schematic PCB 2 of 4 L2346 Revision B June 2004 ...

Страница 65: ...Service Manual 65 Figure 5 21 Display Schematic PCB 3 of 4 L2346 Revision B June 2004 ...

Страница 66: ...66 Bear Cub 750PSV Figure 5 22 Display Schematic PCB 4 of 4 L2346 Revision B June 2004 ...

Страница 67: ...Service Manual 67 Figure 5 23 BEAR CUB 750PSV Overlay P N 51 09640 00 L2346 Revision B June 2004 ...

Страница 68: ...68 Bear Cub 750PSV L2346 Revision B June 2004 ...

Страница 69: ...Service Manual 69 Chapter 6 Troubleshooting Figure 6 1 Troubleshooting Decision Tree L2346 Revision B June 2004 ...

Страница 70: ...e Pressure Transducer 1 Calibrate Pressure Transducer Per chapter 4 of This Manual 2 Remove and Replace Control PCB Pressure Limit Control Does Not Function Correctly Pressure Limit Not Within Specifications 1 Calibration Pressure Transducer 2 Defective Control PCB 3 Defective Pressure Limit Valve 1 Calibrate Pressure Transducer Per chapter 4 of This Manual 2 Remove and Replace Control PCB 3 Remov...

Страница 71: ...Battery Defective 4 Ventilator Not Plugged In To Wall Ac Power 1 Connect Internal Battery 2 Re Charge Internal Battery Connect Ventilator Power Cord To A Wall AC Outlet 3 Remove and Replace Internal Battery 4 Connect Ventilator Power Cord To A Wall AC Outlet Audible Alarm Does Not Activate 1 Wiring Connection 2 Defective Alarm Speaker 3 Defective Control Pcb 1 Verify Connection of P1 of Audible Al...

Страница 72: ...s Corrective Action Valve 4 Adjustable Overpressure Relief Valve Setting 5 Adjustable Overpressure Relief Valve Leaking With 1 L Min Flow Setting Valve 4 Evaluate Adjust Valve Setting 5 Remove and Replace Aopr Valve L2346 Revision B June 2004 ...

Страница 73: ...al Verification Procedure Interior Access 1 If connected remove cables leading to RS 232 and Analog outputs ports of the ventilator 2 Remove the seven screws indicated in Figure 7 1 Figure 7 1 Cover Removal 3 Slide the cover off of the unit applying slight pressure to the outside bottom portion of the cover 4 Remove the two screws indicated in Figure 7 2 The standoff tubes will drop free when the ...

Страница 74: ...ing cord is reached See Figure 7 3 Figure 7 3 Opening of Front Portion Flow Valve Assembly Removal 1 Disconnect hoses and connectors to the assembly 2 Remove the four screws from the flow valve bracket indicated in Figure 7 4 3 Remove the Flow Valve Assembly from the unit 4 To install reverse removal procedure L2346 Revision B June 2004 ...

Страница 75: ...B Removal 1 Disconnect all hoses and connectors from the board 2 Remove screw shown in Figure 7 5 3 Lift board carefully from four retainer points 4 Remove board from unit 5 To install reverse removal procedure Figure 7 5 Control PCB L2346 Revision B June 2004 ...

Страница 76: ... ground wire 4 Remove board from unit 5 To install reverse removal procedure Air O2 Regulator Removal 1 Remove Air O2 fittings from the rear of the ventilator See Figure 7 7 Figure 7 7 Air O2 Fittings 2 Remove all hoses necessary to free the regulator assembly 3 Remove three screws on rear panel 4 Remove assembly from ventilator See Figure 7 8 L2346 Revision B June 2004 ...

Страница 77: ...nnected to the blender 2 Loosen allen screws of knob located on the front of the ventilator Remove knob See Figure 7 9 Figure 7 9 Oxygen Knob 3 Remove three screws located behind the knob See Figures 7 10 and 7 11 4 Remove blender from unit 5 To install reverse order of removal L2346 Revision B June 2004 ...

Страница 78: ...ion Valve Removal 1 Remove all hoses and wiring connected to the valve 2 Remove three screws located on mounting plate See Figure 7 12 3 Remove Exhalation Valve from the ventilator 4 To install reverse removal procedure Figure 7 12 Exhalation Valve Assembly L2346 Revision B June 2004 ...

Страница 79: ...xternal surfaces controls attachments and accessories Opening and cleaning the interior of the unit Visually inspecting all tubing electrical wiring connectors and crimps screws nuts and hardware Checking the general condition of all other internal components or assemblies Replacing the Air and O2 filters Replacing the Air and O2 inlet bowls and seals Pneumatic and electronic verification and cali...

Страница 80: ...t Do not allow any liquid to spill or drip into the ventilator Interior Inspection 1 Open the Ventilator 2 Vacuum all surfaces inside the ventilator Be sure to reach areas around connectors circuits boards and pneumatic assemblies 3 Visually inspect for any overheated components loose connectors damaged wires or tubing kinked tubing loose ribbon cables loose or missing hardware signs of water or o...

Страница 81: ... the plug ground connector and the ventilator chassis ground Current Leakage Test Perform a current leakage test always follow manufacturer s instructions for test equipment operation 1 Connect the ventilator to a properly functioning current leakage tester 2 Turn Mode switch to CPAP and tester on 3 Current leakage should be less than 100 microamps grounded and ungrounded Operational Verification ...

Страница 82: ...ximal Transducer Calibration Replace O ring O2 Transducer Calibration Replace Prox Line Filter Air Transducer Calibration Replace Flow Valve Filter Base Flow Calibration Replace Solenoid Filter Inspiratory Flow Calibration Replace Air Regulator Verify FiO2 Air O2 Regulator Calibration Complete OVP WARNING Do not release ventilator for use if it does not pass all of the procedures specified in the ...

Страница 83: ...n Connector Male 9 pin DSub connector on the Ventilator Duplex Full Baud Rate Selectable 1200 2400 9600 or 19200 Data 8 bit character 1 Start bit 1 Stop bit No parity bit Pin Assignment IBM standard 9 pin version of RS 232 C The ventilator is DTE and will interface to any DCE device through a cable wired 1 to 1 See table 9 1 Table 9 1 Pin Assignment DTE Name DTE Pin Direction DCE Pin Comment DCD 1...

Страница 84: ...e breath phase breath type and alarm status every 10 msec Upon request non real time data will also be sent however it may delay the real time data by up to 25 msec Note the real time data is queued by the ventilator so that it is only delayed and not lost Data Upon Request All non real time data consisting of control settings alarm settings and status and monitor values will be provided upon requ...

Страница 85: ...defined as the one s complement of the sum of all data contained in the data packet excluding the SYN and CHECK characters Table 9 3 Valid Requests Received by the Ventilator Format SYN ID Check SYN 16h ID 20h Send all Adult Control Settings 40h Send all Adult Alarm Settings Status 60h Send all Adult Monitored Data A0h Send all Infant Control Settings C0h Send all Infant Alarm Settings Status E0h ...

Страница 86: ...Pressure Support 100 Time Cycled Pressure Relief 101 Reserved 110 Reserved 111 Reserved Breath Phase z 0 Inspiration 1 Exhalation Data 1 Data 2 Data 3 xxxxxxxx xxxxxyyy yyyyyyyy MSB LSB MSB LSB x Net Flow Insp Exhale 13 bits Range 300 to 300 lpm Binary Scale 1 bit 0 1 lpm Binary Range 0 to 6000 Zero offset 3000 y Proximal Pressure 11 bits Range 60 to 140 cmH2O Binary Scale 1 bit 0 1 cmH2O Binary R...

Страница 87: ...t 5 Pres Aug 1 on 0 off Bit 4 Nebulizer 1 on 0 off Bit 3 Reserved 0 Bit 2 Reserved 0 Bit 1 Reserved 0 Bit 0 Reserved 0 Data n Parameter Range Binary Scale Binary Range Data 3 Tidal Vol 0 03 2 00L 0 01 L 3 200 Data 4 Rate 0 120 bpm 0 5 bpm 0 240 Data 5 Peak Flow 5 150 lpm 1 lpm 5 150 Data 6 Percent O2 21 100 O2 1 O2 21 100 Data 7 Assist Sens 0 2 5 0 cmH2O 0 1 cmH2O 2 50 Data 8 PSV Insp Pres 0 80 cm...

Страница 88: ...2 Bit 7 I E Limit 1 on 0 off Bit 6 Run Diagnostics 1 on 0 off Bit 5 Gas Fail 1 on 0 off Bit 4 Failed to Cycle 1 on 0 off Bit 3 Reserved 0 Bit 2 Reserved 0 Bit 1 Reserved 0 Bit 0 Alarm Silence 0 Data n Parameter Range Binary Scale Binary Range Data 3 High Min Vol 0 80 L 1 L 0 80 Data 4 Low Min Vol 0 50 L 1 L 0 50 Data 5 High Insp Pres 0 120 cmH2O 1 cmH2O 0 120 Data 6 Low Insp Pres 3 99 cmH2O 1 cmH2...

Страница 89: ...0 Data n Parameter Range Binary Scale Binary Range Data 2 MSB Tidal Vol 0 9 99 L 0 01 L 0 999 Data 3 LSB Data 4 MSB Minute Vol 0 99 9 L 0 1 L 0 999 Data 5 LSB Data 6 MSB Spon Min Vol 0 99 9 L 0 1 L 0 999 Data 7 LSB Data 8 MSB 1 I E Ratio 0 00 4 0 0 01 0 400 Data 9 LSB Data 10 Total Rate 0 155 bpm 1 bpm 0 155 Data 11 Spon Rate 0 155 bpm 1 bpm 0 155 Data 12 MMV 0 100 hr 1 hr 0 100 Data 13 Mean Pres ...

Страница 90: ...1 on 0 off Bit 0 Reserved 0 Mode 000 Assist Control 001 SIMV IMV 010 CPAP 011 thru 111 Reserved Data n Parameter Range Binary Scale Binary Range Data 2 Breath Rate 0 150 BPM L 1 BPM 0 150 Data 3 Insp Time MSB 0 10 3 00 sec 0 01 sec 10 300 Data 4 Insp Time LSB Data 5 Volume Limit MSB 5 300 mL 1 mL 5 300 Data 6 Volume Limit LSB Data 7 Insp Flow 1 30 L min 0 5 L min 2 60 Data 8 Base Flow 1 30 L min 0...

Страница 91: ...ure Limit 1 on 0 off Bit 0 Reserved 0 Data 2 Alarm Status Byte 2 Bit 7 Flow Sensor Fault 1 on 0 off Bit 6 Run Diagnostics 1 on 0 off Bit 5 Low Gas Supply 1 on 0 off Bit 4 Low Battery Supply 1 on 0 off Bit 3 Failed to Cycle 1 on 0 off Bit 2 Reserved 0 Bit 1 Reserved 0 Bit 0 Alarm Silence 1 on 0 off Data n Parameter Range Binary Scale Binary Range Data 3 High Breath Rate 0 255 BPM 1 BPM 0 255 Data 4...

Страница 92: ... mL 0 500 Data 3 Tidal Volume LSB Data 4 Minute Volume MSB 0 30 0 L 0 1 L 0 300 Data 5 Minute Volume LSB Data 6 Tube Leak 0 100 1 0 100 Data 7 Insp Time MSB 0 3 10 sec 0 01sec 0 310 Data 8 Insp Time LSB Data 9 Exp Time MSB 0 99 99 sec 0 01 sec 0 9999 Data 10 Exp Time LSB Data 11 I E Ratio Bit 7 Direction 1 if 1 X X 0 if X X 1 Data 12 Breath Rate 0 255 bpm 1 bpm 0 255 Data 13 Peak Insp Pres 0 99 cm...

Страница 93: ...000 09573 Exhalation Valve Assembly 51000 09363 Sub Ambient Over Pressure Relief Valve 51000 40023 Pressure Control Assembly 51000 09484 Proximal Pressure Gauge 52000 00216 Electronic Sub Assemblies Power Supply Module Includes Power Supply PCB 51000 09301 Power Supply PCB 51000 09317 Display PCB 51000 09567 Control PCB 51000 09939 Flow Sensor Connector Assembly 51000 09353 Alarm Speaker Assembly ...

Страница 94: ...neous Knob Front Panel 51000 09461 Knob Rear Panel Apnea Alarm Volume 51000 00261 Knob Mode Select 51000 09514 Knob Oxygen Blending 56000 00268 Fuse 0 5A Slow Blow 56000 20079 AC Power Cord 56090 10540 L2346 Revision B June 2004 ...

Страница 95: ... advisable that a shipping department or organization perform this procedure A local freight company will usually pack the product at your facility for a small service charge The packaging carton consists of Accessory Carton 51000 09505 Anti static Bag 26 x22 x44 51000 06056 Cavity pack bottom 51 09504 02 Cavity pack top 51 09504 01 Shipping Carton 51000 09502 Shipping Label 51000 20038 Procedure ...

Страница 96: ...96 Bear Cub 750PSV Figure 11 1 Repacking Procedure L2346 Revision B June 2004 ...

Страница 97: ...s Inlet Conditioning 25 Ground Resistance 81 High Breath Rate 15 High Pressure Limit 16 Hourmeter 18 Humidity 21 I E Ratio 18 Inlet O2 Pressure 18 Inputs 20 Inspection 34 Inspiratory Flow 14 Inspiratory Pressure 15 Inspiratory Time 14 17 Interior 73 Line Power 17 Low Battery 16 Low Gas Supply 16 Low Inspiratory Pressure 16 Low PEEP CPAP 15 Maintenance 79 Manual Breath 15 Mean Airway Pressure 18 mo...

Страница 98: ...e Protocol 84 specifications 13 STANDBY 13 Sterilization 21 structure 23 Sub Ambient Valve 26 Temperature 21 Test 19 Theory of Operation 23 Total Breath Rate 17 Troubleshooting 69 Ventilator Electronics 27 Ventilator Software 28 Visual Reset 16 Volume Limit 14 warranty 5 L2346 Revision B June 2004 ...

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