Embed Size (px)
Citation preview
Doc 0930
Technical Manual for the
NIPPY+ Range of Ventilators
This manual covers all of the NIPPY+ range of ventilators
This manual contains confidential information and it is supplied on the understanding that it shall not be copied, loaned or distributed to any other persons or organisations, in whole or in part, without the written consent of:
Breas Medical Ltd Unit A2, The Bridge Business Centre
Timothy’s Bridge Road Stratford–upon-Avon
CV37 9HW
Tel: 01789 293460
www.nippyventilator.com
Version 10, December 2017
Contents
Introduction 1
Description 2 - 5
Service Menus
Time and Date 6
Service Period / Calibration 7
Diagnostic Screen 8
Alarm Log 9
Install Defaults 10
Fault Messages 11-12
Event Log 13
Opening the Case
Fig 1, Opening the Case 14
Fig 2, Inside the base 15
Fig 3, Inside the base – Control bd removed 16
Fig 4, Location of Components – Lid 17
Removal of Major Components 18-19
Preventative Maintenance Guide 20
Suggested Acceptance tests 22
Internal Battery 23
Replacement of Alarm Battery 24
Calibration 25
Theory of Operation 26
System Pneumatic Diagram 27
Block Diagram 28
Block diagram of Control Board 29
Block diagram of Command Board 30
Circuit Diagrams 31- 42
Specification 43
Spare Parts List 44
1
Introduction
The purpose of this manual is to enable suitably qualified competent technical personnel to perform first line maintenance on the NIPPY+ family of ventilators. The NIPPY+ range consists of :- NIPPY 3+, NIPPY junior+, NIPPY St+ and NIPPY S+. They all use the same hardware and service procedures. Component level fault finding will not be considered. Due to the complexity of the circuit boards used in the NIPPY+ range, it is not considered practical or cost effective to try to trace faults to component level. Second-hand or “service exchange” boards are not available. This manual will deal with routine maintenance, calibration and replacement of major components. IMPORTANT Read this manual before attempting service or repair of the NIPPY+ Please contact Breas Medical Ltd if training is required or you have any questions. NIPPY+ must be subjected to regular inspection according to Breas Medical Ltd service instructions. Repairs shall be carried out in accordance with this technical manual and any special service instructions or bulletins provided by Breas Medical Ltd. Before opening the case, disconnect the NIPPY+ from the mains supply. Do not work on the NIPPY+ with the case open and the power supply connected. Make sure that all precautions to prevent Electrostatic Discharge (ESD) have been taken. Do not use explosive gases and/or fluids near the NIPPY+.
2
Description The NIPPY+ range ventilators are intended to provide ventilation for non-dependent, spontaneously breathing adult patients with respiratory insufficiency, or respiratory failure.
The NIPPY+ range devices are pressure controlled, positive pressure ventilators. They compress ambient air and deliver it to the patient through a close fitting nasal mask or a tracheostomy. The output pressure, timing and alarms can be adjusted by controls on the fascia panel. The Pressure, estimated Tidal Volume, Rate and all settings are displayed on a colour LCD (Liquid Crystal Display) screen.
The screen can be set to dim after a pre-set time (accessed via the user preferences in the main menu). To restore the display, press any button once.
The basic ventilator settings can be achieved using the four buttons to the left of the display. The four buttons to the right of the display adjust the alarms and provide access to more advanced features and adjustments (accessed via a menu).
NIPPY 3+ and NIPPY junior+ are normally supplied with an internal battery fitted. This is available as an option on NIPPY ST+ and NIPPY S+.
All can run on an internal or external battery or both if extended run times or extra back up is required.
All are capable of recharging their internal batteries and the external Lithium ion packs. The internal battery has priority over the external one.
3
Modes of Ventilation
CPAP (Continuous Positive Airway Pressure) Constant positive pressure is applied via the mask. No respiratory support is given in this mode. NIPPY 3+, NIPPY Junior+, NIPPY ST+.
Pressure Support IPAP (Inspiratory positive airway pressure) and EPAP (Expiratory positive airway pressure) are set by the physician. The ventilator augments the patient’s spontaneous breathing. Adjustable back-up rate takes over in the absence of an inspiratory trigger. NIPPY 3+, NIPPY Junior+, NIPPY ST+, NIPPY S+.
Pressure Control IPAP, EPAP and Ti are set by the physician. A timed inspiration is cycled by the patients inspiratory effort. Adjustable back-up rate takes over in the absence of an inspiratory trigger. NIPPY 3+, NIPPY Junior+.
IPPV (Intermittent Positive Pressure Ventilation) IPAP and Ti are set by the physician. A timed inspiration is cycled by the patient’s inspiratory effort. Patient exhales to atmosphere via an exhale valve fitted in the breathing circuit. EPAP is not used in this mode. Adjustable back-up rate takes over in the absence of an inspiratory trigger. NIPPY 3+, NIPPY Junior+.
4
Alarms
Power Fail If the electrical power to the ventilator is interrupted, an audible alarm will sound. This alarm will run for 5 minutes unless cancelled with the mute button. Once cancelled the power fail alarm will not re-activate.
Low Internal Battery When running on its internal battery, the alarm will operate when the battery is low. This could last for up to 1 hour. When the alarm becomes constant there is approximately 10 minutes running time left.
Low External Battery When running on its external battery, the alarm will operate when the battery is low. This could last for up to 1 hour. When the alarm becomes constant there is approximately 10 minutes running time left.
Low Pressure A pre-set low pressure alarm is provided. If the control pressure falls to below 50% of the set IPAP level for 10 seconds an audible and visual alarm will operate.
High Pressure A pre-set high-pressure alarm is provided. If the pressure rises above 120% of the working pressure, an audible and visual alarm will operate after a 2 second delay.
Breathing Circuit Disconnect A disconnection alarm is provided as a back up to the high flow alarm. If the patients flow waveform indicates that a significant leak maybe present in the breathing circuit an audible and visual alarm will operate. The sensitivity of the alarm is adjustable.
Breathing Circuit Malfunction This alarm warns of a malfunction of the exhale valve in the IPPV mode circuit.
High Flow alarm An adjustable alarm is provided to warn of excess inspiratory flow. This is activated when the inspiratory flow exceeds the set high flow alarm level for 5 seconds. An audible and visual alarm will operate.
Low Flow alarm An adjustable alarm is provided to warn of insufficient inspiratory flow. This is activated when the inspiratory flow fails to achieve the set low flow alarm level for 10 seconds. An audible and visual alarm will operate.
Apnoea Alarm An adjustable Apnoea alarm is provided. If an apnoea is detected an audible alarm will sound with a visual indication on screen.
Max Breath Rate An adjustable maximum breath rate alarm is provided. If the max breath rate is exceeded an audible and visual alarm will operate.
Fault The alarm may also be operated by an internal fault. In this case the fault will be displayed on screen.
These alarms may be muted for approximately 2 minutes to allow for setting up of the ventilator.
Low Internal Alarm/Memory Battery An intermittent alarm (short beep) with no onscreen message indicates a depleted mains fail alarm battery. If the ventilator has been stored for more than a few weeks the internal battery will self-discharge. In this case the alarm will stop after the battery has recharged.
5
Estimated Tidal Volume
The estimated tidal volume is a calculated value, based on time and calibrated flow values. The constant leak through the breathing circuit exhalation port is subtracted from this calculation to give a reasonably accurate estimation of tidal volume. If a different exhalation port is used (a ventilated mask for example) this calculation may be affected by the possible change in exhalation port flow rate. This must be taken into consideration when reading the tidal volume.
A ventilated mask with a higher flow exhalation port will cause the estimated flow reading to be slightly higher than normal.
Inspiratory Trigger
The NIPPY+ employs flow triggering, detecting the start of the patients’ inspiratory effort when the flow rate exceeds the level set by the Inspiratory Trigger sensitivity.
Expiratory Trigger
The expiratory trigger is used in Pressure Support mode only. Towards the end of inspiration, when the inspiratory flow rate drops to the baseline (standing flow caused by exhale port leak) minus the expiratory trigger sensitivity the ventilator will cycle into the expiratory phase.
The inspiratory and expiratory effort required to cycle the ventilator can be adjusted via the Trigger option in the Menu.
For simplicity the trigger sensitivity is scaled 1 –10, with 10 being the most difficult.
Battery Charging
Both internal and external batteries are of Lithium Ion construction. Charging is fully automatic. When the ventilator is connected to mains power but not running, batteries will be charged continuously. The internal battery is charged to approx. 95%, and then the external battery (if present) is charged to the same level, before switching back to internal to complete the charge. The charge will be terminated when both batteries are fully charged.
Whilst the ventilator is running, the batteries are charged during the EPAP period of the breathing cycle.
When the ventilator is switched off it is in standby mode. It will “wake up” every 16 seconds to check the state of its batteries and start a charge sequence if necessary.
6
The Service Menu Accessing the service menu To access the service menu, power up the machine whilst holding down the Hi and Lo alarm setting buttons (Menu and Mute on NIPPY S+ and ST+). Press Menu and select Service menu from the main menu.
Set Time and Date
Press the set button to select the value and use the + and – buttons to adjust. Time zone may be set for anywhere in the World.
Press menu to leave this screen.
7
Service Period
The service period screen shows the total running time and running time since the last major service. When a 10000 hour service has been completed, press the + and – buttons together for 2 seconds. The current date will be entered into the service record and the service indicator will be reset. This provides an on-screen record of major services.
Calibration Screen
In this screen the calibration of the flow and pressure transducers is accessed. The machine then generates its own pressure or flow to be compared to a calibrated standard. Altering the blower speed varies the pressure and flow. Use the Set button to move from blower speed to pressure or flow. Use the + and – buttons to adjust the values. Press and hold Hi and Lo alarm buttons for 2 seconds to restore default calibration values.
8
Diagnostic Screen
This screen shows the following information:-
Box internal temp The internal temperature. If this value rises above 60 degrees, an alarm will be activated.
Blower current Current consumed by the blower
Pressure Error The pressure servo loop error. This should ideally be close to zero.
PSU Voltage The internal power supply voltage. Nominally 24V dc
Int. Li. Batt. Vlt. The internal lithium battery voltage, if present. Nominally 18.75V.
Int. Li. Batt. Curr. Charge or operating current of the internal battery.
Ext. Li. Batt. Vlt. The external lithium battery voltage, if present. Nominally 18.75V.
Ext. NiMh.Batt.V The external Nickel Metal Hydride battery voltage, if present. Nominally 24V.
Ext. Pb.Batt.Vlt The external Lead Acid battery voltage, if present. Nominally 24V.
Ext. Batt. Cur External battery current in Amps. A positive value represents a charge current and negative represents discharge. Charging is only possible for Lithium batteries.
Charge Voltage Battery charging voltage. 20.5V fully charged.
9
Alarm Log
The alarm log shows the number of alarm events and the time and date of the last occurrence.
Alarm Log Entry Explanation
“Over Pressure” Pressure exceeded 120% of IPAP setting
"Under Press." Pressure failed to reach 50% of set IPAP level
"High Flow" Flow exceeded the high flow alarm level. Disconnected or excessive leak.
"Low Flow” Flow failed to reach low flow alarm level for more than 10 seconds. Airway blockage.
"Low Bat.V." External battery voltage low
"Disconnection" Breathing circuit disconnection.
"Mains -> Batt." Auto switch to internal or external battery after mains failure.
"Defs.Loaded" Default values loaded.
"Power Lost" Power failure.
"L.Saved.Ld." Last saved values loaded
"Press.Meas.Flt" Loss of pressure signal
“Safe mode” Blower at minimum speed following Press.Meas.Flt
"Blower Flt." Blower controller fault or blower stopped.
"Blower Spd.Flt." Error between blower speed command and actual blower speed.
"Box Ov/Un Tmp." Internal temperature below 5 degrees or above 60 degrees.
"Main Power Flt" Internal power supply voltage out of spec. Less than 22 volts or greater than 26 volts.
"Int.Coms.Flt." Communication failure between internal micros.
"Alarm PIC Flt." Communication error with alarm micro.
"Alarm PIC Bat." Internal alarm / memory back up battery voltage low or high.
"B.Ram0.Flt."; Battery backed-up memory access fault.
"B.Ram1.Flt."; Battery backed-up memory access fault.
"B.Ram2.Flt."; Battery backed-up memory access fault.
"EE.Mem.Flt."; Eprom memory access fault. Machine loads default values.
10
Install Defaults
If the ventilator is to be re-used for a different patient, the settings may be restored to the factory defaults. These are:-
NIPPY 3+ NIPPY Junior+
IPAP 12cm 12cm
EPAP 3cm 3cm
Ti back-up 1.0 seconds 1.0 seconds
Mode Pressure Support Pressure Support
Hi Alarm 100L/min 60L/min
Lo Alarm 20L/min 20L/min
I Trigger 4 4
E Trigger 4 4
11
Fault messages Fault Message Fault Log Entry Explanation Probable Cause Possible Remedy
Pressure Measurement fault
"Press.Meas.Flt" Loss of pressure signal Pressure transducer pipe disconnected. Pressure transducer fault.
Reconnect pipe and restart machine. Replace power board.
Technical Fault Vent Now in Safe Mode Stop Using This Machine Note 1
Safe Mode Ventilator has set to minimum output following a pressure measurement fault. This prevents operation with no feedback.
Pressure transducer pipe disconnected. Pressure transducer fault.
Reconnect pipe and restart machine. Replace power board.
Blower Control fault "Blower Flt." Blower controller fault or blower stopped. Seized Blower motor Controller fault
Replace blower Replace power board.
Blower speed fault "Blower Spd.Flt." Error between blower speed command and actual blower speed.
Motor fault Controller fault
Replace blower Replace controller
Enclosure Temperature fault
"Box Ov/Un Tmp."
Internal temperature below 5 degrees or above 60 degrees.
Machine covered, operated in high ambient temperature or cooling vents blocked.
Check operational environment. Check cooling fan operation and vents.
Power supply fault "Main Power Flt" Internal power supply voltage out of spec. Less than 22 volts or greater than 26 volts.
Power supply fault Replace power supply
Control System fault "Int.Coms.Flt." Communication failure between internal micros.
Failure of command micro or power micro.
Replace command board or power board.
Note 1: The technical fault message informs the user that the ventilator has switched to safe mode to protect against operation without pressure feedback. The output is sufficient to clear exhaled gas only. If the original fault (pressure measurement fault) is still present, this message will alternate with the pressure measurement fault message with each press of Mute. If the original fault has cleared, only the technical fault message will be shown. Mute time in this configuration is reduced to 10 seconds. The pressure measurement fault should be investigated.
12
Fault Message Fault Log Entry Explanation Probable Cause Possible Remedy
"Alarm PIC Flt." Communication error with alarm micro. Power interruption has caused communication error.
No action required. Unless there are multiple occurrences, then change command board
Alarm back up battery fault
"Alarm PIC Bat." Internal alarm / memory back up battery voltage low or high.
Battery self discharges when not in use. Faulty battery
Run machine for 12 hours to recharge battery. Replace battery.
"B.Ram0.Flt."; Battery backed-up memory access fault. Machine failed to access memory, probably because of sudden power down.
No action required. Alternative memory location will have been used.
"B.Ram1.Flt."; Battery backed-up memory access fault. Machine failed to access memory, probably because of sudden power down.
No action required. Alternative memory location will have been used.
"B.Ram2.Flt."; Battery backed-up memory access fault. Machine failed to access memory, probably because of sudden power down.
No action required. Alternative memory location will have been used.
"EE.Mem.Flt."; Eprom memory access fault. Machine loads default values.
Machine failed to load from Eprom memory.
Change command board.
13
The Event Log
The ventilator automatically stores every event during its lifetime. This event log is not displayed on-screen but may be downloaded to a PC using download lead part no. 0858. The following events will be stored in the memory:- Power on / off Power interruptions Any button push Any adjustment Any alarm event Switching to battery and/or back to mains Battery voltage when running on battery Viewing of the service menu Any calibration alteration Pressure, and settings are logged at intervals when there are no other events to log These events are stored in chronological order. To view the event log, the PC must have NIPPY for Windows software loaded. With the software running and the RS232 download lead connected, go to the Tools menu and select Event Log. Click on Get Latest to view the most recent events. Click on Previous or Next to scroll through the events.
0086
100 - 240V0.4 - 1.0 Amperes47 - 63Hz
Fuse 2 x T1.6A SN
RS 232
Cooling Vent
1
2
3
1. Aux. Power - 24 Volt connection for external battery. Connect only recommended batteries, part no 0910
2. RS232 Port - For connection to remote alarm or personal computer. Isolated to 1500 Volts.
3. Power Inlet - Input mains power connector. Double fused and fitted with connector retaining clip.
14
Opening the Case
IMPORTANT Disconnect the ventilator from the mains supply and / or any external battery. Invert the ventilator and remove the seven recessed, hexagon socket screws. Stand the ventilator on its base and ease the lid upwards, away from the rear panel. When the rear of the lid is clear of the rear panel, lift it from the left hand side. Disconnect the RS232 connector (4) and the board to board ribbon cable (3).
1
2
3
4
Fig 1. Opening the NIPPY
1. Command board
2. Control Board
3. Board to Board Ribbon Cable
4. RS 232 Connection.
15
123456
7
8
9 10
11
12
13
Fig 2.
Inside the Base
1. Mains Power Supply
2. Battery Clamp
3. Battery
4. Internal Battery Connector
5. Blower Connector
6. PSU Connector
7. External Battery Connector
8. Cooling Fan Connector
9. Pressure Transducer
10. Flow Transducer
11. Flow Head
12. Patient Outlet Port
13. IPPV Exhale Valve Control Line (NIPPY 3+ and jnr+ only)
16
Fig 3.
Inside the base with the control board removed
17
1
2
3
4
5
6
7
8910
Fig 4. Inside the Lid
1. RS 232 Port
2. Board to Board Ribbon Connector
3. Memory Battery Switch
4. Display Connector
5. Display Back-light Connector (Input)
6. Keypad Connector
7. Alarm Sounder
8. Display Back-light Connector (Output)
9. Second Alarm Sounder
10. Alarm and Memory Back-up Battery
18
Removal of major components
IMPORTANT Before opening the case, disconnect the NIPPY+ from the mains supply. Do not work on the NIPPY+ with the case open and the power supply connected. Make sure that all precautions to prevent Electrostatic Discharge (ESD) have been taken. Do not use explosive gases and/or fluids near the NIPPY+. Unscrew the 7 case screws to separate the two halves of the case. Disconnect the board to board ribbon cable and the RS232 lead (fig 1). Lay the ventilator lid next to the base.
The Battery
Refer to fig 2 Disconnect the battery connector (4). There is no need to remove the board to do this. Support the corner of the board with thumb and forefinger and gently wiggle the connector downwards until it comes free. Remove the battery clamp by removing the 2 M4 x 10 screws. Remove the battery. Reverse this procedure to refit.
The Power Supply
Refer to fig 2. Disconnect the 2 way mains connector and the earth terminal. Disconnect the 12 way output connector. Remove the 4 securing screws and lift the power supply out of the case. Reverse this procedure to refit.
The Control Board
Refer to fig 2.
Disconnect the internal battery first. Disconnect the 3 Molex connectors. (Int Battery, PSU, Ext Battery, Cooling fan). Disconnect the blower connector. Disconnect the 4mm silicon tubes from the pressure and flow transducers. Disconnect the green and yellow small bore tubes from the Exhale valve control solenoid. Located on the underside of the board. Remove the 4 securing screws. To refit:- Connect the 2 small bore tubes. NOTE: the green tubes fits on the port nearest the back edge of the board. The yellow tube fits on the adjacent port. If the ends of the tubes are stretched, trim off approx. 2mm of tube. Connect the PSU and connector. Place the board into the lid and fit the 4 mounting screws.
19
Connect the Cooling fan, the blower, the internal and external and Battery connectors. Connect the pressure and flow transducers tubes as follows:- Longest (clear) tube from rear port of flow-head to the flow transducer port P1 (rear) Green tinted tube from front port on flow-head to front port of pressure transducer. Blue tinted tube from middle port of flow-head to flow transducer port P2 (front)
The Blower
Refer to fig 3. Remove the Control Board. Release the pipe clip at the blower end of the blower to flow head duct. Remove the green 2mm tube (above the outlet) Remove the battery clamp by removing the 2 M4 x 10 screws. Remove the 6 M4 blower assy retaining screws. Remove the entire blower assembly. Reverse this procedure to refit.
The Command Board
Refer to fig 4. Disconnect the 16 way interconnect lead, the Keypad connector, the display connector. Remove the 4 nuts and washers at each corner of the board. Lift up the board and, when accessible, disconnect the back-light connector.
The Display
Refer to fig 4. Remove the Command Board. Remove the 4 hexagon spacers from the mounting studs. Lift out the display module. Before refitting or replacing, ensure that the inside surface of the display window and the surface of the display are spotlessly clean. Any foreign bodies will show through the display window when re-assembled. Reverse this procedure to refit.
The Cooling Fan
Remove the three nylon “xmas tree” fasteners securing the fan to the rear panel. New fasteners are provided with a new fan. Disconnect the 3 way fan connector on the control board. Fit the new fan and reconnect the 3 way connector.
20
Preventative Maintenance Guide
Maintenance levels will vary according to environmental conditions, duty cycle and pressure settings. This preventative maintenance guide has been written to assist in preparing maintenance schedules.
Before use
Check condition of the mains lead and connector.
Check inlet air filter (Replace if necessary).
Test alarm functions.
Every 12 months
Visually inspect for damage
Replace air inlet filter.
Carry out functional test of alarms as detailed in instruction manual "Alarm Conditions / Tests".
Check and adjust pressure and flow calibration (Page 25)
Check and adjust the time and date (Page 6)
Check battery condition (Page 23)
Carry out an Electrical Safety Test on ventilator and mains lead.
Every 2 years
Internal battery service life is 2 years under normal conditions.
Replace the battery (Page 18) when running times drop below those indicated or every 2 years (Page 23)
Every 10000 hours
Annual service plus:-
Replace internal pcb mounted alarm back-up battery (or during annual alarm function test if volume of mains fail alarm has diminished). Replace after 3 years if machine has not reached 10000 hours. (Page 24)
Replace blower assembly (Page 19)
Check security of all fasteners (Nuts & screws).
Check security of all electrical connections.
Enter the Service period screen and set the service date.
All necessary parts are contained in the 10000 hour service kit, part number 0931.
21
Cleaning the Flow Head
Not applicable to later models using a moulded flow head/outlet pipe.
Depending on the age of the NIPPY+ it may be fitted with a flow head which uses a stainless steel gauze to restrict the airflow slightly and cause a flow of air through the flow transducer. If dirt or dust is allowed to build up on the gauze, the flow calibration may be affected.
Inspect the gauze type of flow head when servicing the NIPPY+.
Remove the flow head from the ventilator before cleaning.
Any contaminates should be cleaned off very carefully. Ultrasonic cleaning is preferred but if this is not available the gauze may be cleaned using a small soft bristled brush dipped in isopropyl alcohol. Allow to dry before use.
Always check the flow calibration after cleaning.
22
Suggested Acceptance Test
Visual Inspection
Check the NIPPY+ for transit damage.
Functional Tests
Connect a breathing circuit and test lung to the patient outlet and check function of modes.
Maximum Pressure
Set IPAP to maximum and ensure NIPPY+ achieves set pressure.
Alarm tests
Disconnect the breathing circuit and allow the flow to exceed the high flow alarm. A visual and audible high flow alarm will be activated after 5 seconds. The disconnection alarm will follow after 10 seconds.
Occlude the patient outlet. A visual and audible alarm will be activated after 10 seconds.
(NIPPY S+ and ST+ display a disconnection alarm only)
Internal Battery
When fitted the internal battery icon is displayed on the screen.
Switch off the mains supply to the NIPPY+ when it is running and ensure that the “Running on Battery Power” message is displayed and continues until the mute button is pressed.
Buttons
Check each button on the keypad functions correctly.
Help
Ensure help window is available for each button.
Electrical Safety Test
NIPPY+ devices are Class I, type B.
23
Internal Battery
Battery Life
The end of life is defined by the maximum running time falling to 75% of that of a new battery. Run time will vary according to the ventilator settings so it is important that the users follow the battery care recommendations so that an aging battery can be identified and reported at the appropriate time. Replace the battery when running times drop below those indicated or after 2 years. The battery life is dependent on its use and environmental conditions. A battery which is used often but only partially discharged is capable of several years of reliable service. A battery which has been on permanent standby will age far quicker and could be at the end of its service life after 2 years. If used frequently in deep discharge it will be less. The only way to assess battery condition is to perform a run time test with the patient outlet connected to a test lung with an exhale port leak fitted.
Battery Storage
This type of battery is best stored partly charged. A battery that is not in use will slowly discharge. This rate of discharge increases with temperature.
Battery Test
Test the battery if the running time seems low, a fault is suspected, or to confirm that the battery is good.
• Ensure the battery is fully charged.
• Run the ventilator from the battery until the low battery alarm operates and record
the running time. Look up run time in the table. If the battery is not achieving
minimum run time replace it.
• If the battery is good, fully recharge it immediately after testing.
Quick Test It is not always possible to check battery run times, especially during field service. A crude quick test may be performed to identify a battery that is at the end of its life and has not been noticed by the user. This test is not an indication that the battery is good, but is a useful way of identifying a failed battery. Increase the IPAP to maximum and run the ventilator with the patient outlet port open to atmosphere. If the ventilator shuts down within 2 minutes the battery must be replaced. After the test, return IPAP to the user’s normal setting.
Run Times
Run times shown assume a fully charged battery in as new condition. Battery run times will typically be 20% more in IPPV mode because of the absence of the exhale port leak.
Typical Running Times Pressure control/support with EPAP set to minimum @ 20BPM
IPAP Run Time (Hours) Min Run Time (Hours)
15 11 8.25
20 9.5 7.25
25 8.5 6.25
30 6.5 5
35 5.5 4
38 5 3.75
24
Replacement of the pcb mounted Alarm Battery Open the case. See fig 1. Locate the battery switch on the command board (Item 3, fig 4) marked SW3 on the pcb. When viewed from the front, the right hand DIP switch (marked BATT on the pcb) is the battery isolation switch. It is normally in the ON position. The left hand one of the pair (marked MEM CLR on the pcb) is the memory reset switch. It is normally in the OFF position Before attempting to remove the battery, set BATT to the OFF position then MEM CLR to the ON position. Using a fine pair of wire cutters, snip the legs of the battery (item 10, fig 4) and remove the battery. Carefully remove the remaining legs and solder from the pcb. Take a new battery and tin the legs. This is important, as it will clean off any tarnish that would make soldering difficult. Bad soldering could cause irreparable damage to the pcb. Cut the legs to a suitable length for pcb mounting (approx. 2mm). Solder the battery in place from the component side. Inspect the joints for proper wetting. Reset the Dip switches. MEM CLR to the OFF position and then BATT to the ON position. Double check the switch settings. Note: If the switch markings have become illegible, ON is towards the rear of the case and OFF is towards the front After changing the battery, the date and time will need to be reset.
25
Calibration of Pressure and Flow reading.
Accurate calibration of the pressure and flow measurement is essential to the operation of the control pressure and alarms.
1. Connect the patient outlet to a calibrated pressure and flow standard, using 22mm dia. smoothbore tubing, with no leak between the ventilator and calibrator.
2. Enter the calibration screen
3. Set the blower speed to 0%. (short cut – press Lo Alarm button)
4. Wait for the blower to stop. Ensure that the flow has ceased before proceeding.
5. Check pressure reading is zero. If adjustment not required proceed to step 7.
6. Press the set button to select the pressure reading.
Use the + and – buttons to adjust the pressure reading to zero. This value is filtered, so you will have to allow for a delay between adjustment and the value change. Do not over adjust, the pressure reading cannot go negative.
7. Check Flow reading is zero. If adjustment not required proceed to step 9.
8. Press the set button to select the flow reading.
Adjust the flow zero with the + and – keys. This adjustment is quite coarse, do not over adjust.
9. Press the set button to select the blower speed.
10. Adjust the blower speed to give a flow reading of 100 l/minute on the calibrator.
11. Check Flow reading. If adjustment is not required proceed to step 13
12. Press the set button to select the flow display.
Using the +/- keys, adjust the flow reading to 100 l/minute.
13. Block the calibrator outlet, ensuring that there are no leaks. Set the blower speed to give a pressure of 25cm as read on the calibrated standard.
14. Check pressure reading. If adjustment is not required proceed to step 16
15. Press the Set button to select the Pressure reading.
Using the +/- buttons adjust the pressure reading to 25cm.
16. Press Menu to save and exit calibration.
Note:
The software cannot adjust offset values larger than 5 cm or 15 l/min. This usually indicates damage to the transducer. Replace the transducer before continuing.
If the flow reading is erratic or seems to need frequent re-calibration, water or nebulising agents may have contaminated the transducer. If this is the case, replace the transducer.
If required, the calibration may be returned to default values by pressing and holding the Hi and Lo buttons together. Over a period of time, small offset adjustments may have been carried out. Reverting to default values may result in a large offset equal to the accumulated past offsets. This may be greater than the maximum permissible adjustment.
26
Theory of operation The ventilator is powered by 24Vdc, derived from the mains (via an internal power supply) or an internal or external battery. A 10 volt instrumentation supply and 5 volt logic supply is derived from the 24 volts via on board regulators. The 5 volt logic supply is live as soon as power is applied to the machine. Ambient air is compressed by the blower and fed to the patient. Pressure control is achieved by varying the blower speed. The electronic control is divided into two sections. The Command board, mounted behind the display and the Control board, mounted on top of the blower housing. There are three microprocessors in the NIPPY+. The control microcontroller (on the control board) and the alarm micro communicate with the main microprocessor (both on the command board) to control and monitor all of the ventilator functions. This interdependant two way communication means that none of the micros can fail without one of the others reporting the failure and activating a visual and / or audible alarm. User inputs are processed by the main microprocessor and communicated to the control microcontroller. The control micro has its own on-board memory. If the main micro were to fail, the ventilator would continue to function with its last saved settings. Command signals from the control micro are conditioned by the control electronics in order to drive the blower and control battery usage and charging. All of the internal parameters are monitored by the main micro and out of spec operation is reported on the screen as a machine fault. Ventilator parameters are displayed on a colour LCD display, illuminated by a cold cathode fluorescent back light. The back-light inverter is located on the back of the command board. Very high voltage exists at the output of the inverter. Always disconnect from the mains and battery before removing the command board. In IPPV mode, air pressure to control the exhalation valve is gated by a solenoid valve mounted on the control board. This valve is not used in any of the other modes. Battery charging is automatic. If an internal battery is fitted, it will be monitored and charged as required. This is determined by the control board micro. Each machine has a Service Menu where diagnostic and calibration information can be accessed by technical staff. The ventilator can be calibrated from the Service Menu, Calibration screen.
27
1. Fresh air inlet
2. Blower (compressor)
3. Flow Sensor
4. Outlet connector
5. EVC Port (IPPV mode only)
6. Breathing Circuit
7. Exhalation Port
8. Patient Connection Port
9. Exhalation Valve (IPPV mode only)
Ventilator System Pneumatic Diagram
2
3 4
5
6
7
8
9
28
Display/ User Interface
MicroprocessorRS232Port
Microcontroller
AlarmMicrocontroller
Alarm
ControlElectronics
Blower
PressureTransducer
FlowTransducer
PatientOutlet Port
IPPV modeEVCPort
and
Command Board
Power Board
NIPPY 3+ BLOCK DIAGRAM
EVC SolenoidValve
FlowHead
29
Block Diagram of Nippy 3+ Control Board
Control Micro
EVCSolenoid
BlowerDrive
PressureAmp
PressureTransducer
FlowTransducer
Battery Control/Charging
30
31
Circuit Diagrams
32
33
090
1
0901
PC
B a
ssem
bly
fo
r C
on
trol B
oard
pri
ma
ry s
ide
16
/11
/07
34
090
1
0901
PC
B a
ssem
bly
fo
r C
on
trol B
oard
se
co
nd
ary
sid
e
16
/11
/07
35
07
56 C
17
/02/0
4A
4 1
:1
Co
mp
on
en
t L
ayo
ut
for
Nip
py 3
Co
mm
an
d B
oard
0756 C
36
37
38
39
40
41
42
47
00
uF
43
SPECIFICATIONS
Supply Voltage - 100 - 240 V alternating current
Supply Frequency - 47 - 63 Hz
Maximum Input Current - 0.40 – 1.0 Amperes
Fuse Ratings - 2 x T 1.6 A 20mm
Dimensions (mm) Length – 297, Width – 223, Height - 132
Weight - 3.6 kg (4.5 kg with internal battery)
Ambient Operating Temperature - 40o C 104oF Max
Digital Output - RS232 Isolated to 1500 Volts
All displayed readings expressed as - ATPD
Max. Output Pressure - 38 cmH2O (30 cmH2O Jr+)
(44cm fault condition)
Calibrated pressure Range - 0 – 38 cmH2O (0-30 Jr+)
Accuracy of pressure reading - +/- 3.0% F.S. +/-1% zero
Max. Output Flow - 200 L/min. (unrestricted)
Max Volume Reading - 2000 millilitres
Accuracy of volume reading - Estimated
Accuracy of Flow reading - +/-10%
Inspiratory Trigger - 0.14 – 2.21 L/sec2
Expiratory Trigger - 0.28 – 1.67 L/sec2
Low Flow Alarm - 0 – 200 lpm
High Flow Alarm - 0 – 200 lpm
Inspiratory Time - 0.5 – 3.0 seconds
Back-up Rate - 6 - 60 Breaths per minute
Type of protection against electric shock - Class 1 equipment
Degree of protection against electric shock - Type B to EN 60601-1
Mode of operation - Continuous
IP rating - X0
Storage environment - -20 to 50OC, 5 – 85% RH
260 – 1100 mBar atmospheric pressure
Internal battery - 24Vdc 6.8 Ahr
Running time - 4 -12 hours depending on settings and leak
External battery - 24Vdc 6.8 Ahr
Running time - 4 -12 hours depending on settings and leak
Protection against flammable anaesthetic mixtures - Not suitable for use in the presence of a FLAMMABLE ANAESTHETIC MIXTURE WITH AIR OR WITH OXYGEN OR NITROUS OXIDE
International Standards
BS EN60601-1 1990, EN 10651- 6 2004
Safety of Electromedical Instruments, General Requirements
Electromagnetic Compatibility (In accordance with the EMC Directive 89/336/EMC)
B & D Electromedical declares that the NIPPY 3+ Ventilator complies with the following EMC standards. EN60601-1-2: 2001
Test results available for review from B & D Electromedical
0086
44
Spare Parts
Case 316-11
PCB assy Control Board 0900
PCB assy Command Board 0754D
Power supply 10007350
Cable Assy Mains 0767E
Cable Assy PSU Harness 0770C
Cable Assy Battery Link 0771D
Cable Assy RS232 0779
Cable Assy Board Interconnect 0786B
Cable Assy Inverter connector 0799A
Membrane switch panel 0737B(check model)
LCD Display TRI – MODH – 0798
Display window B&D-3002-SF
Blower assembly 0890-U51D1
Blower to outlet tube U62-78/NP
Hose Clip Blower 291-694
Outlet adapter / Flow head 0909-(check colour)
EVC Outlet adapter 0780A
Inlet Filter Housing RCFM-60
Inlet Filter Media 0584
Cooling Fan MC30060V2-000U-A99
Mains Fuse T1.6A 541-2947A
Mains lead N1019
Rubber Feet 382 2386
EVC tube green 38147-GN-SP
EVC tube yellow 38147-YL-SP
10k hour Service Kit 0931
Internal battery 0913
External battery 0910
