Fisher & Paykel MR850 manual

MR850 RESPIRATORY HUMIDIFIER Technical Manual REVISION J Copyright ©2005 Fisher & Paykel Healthcare Ltd. Auckland, New Zealand[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 2 Fisher & Paykel Healthcare Head Office: PO Box 14-348, Panmure, Auckland 1134 New Zealand Email: info@fphcare.com Web Site: www.fphcare.com Tel: +64-(0)9-574-0100 Fax: +64-(0)9-574-0158 France/Benelux: Parc Silic-Bal F, 10 Avenue de Quebec, Silic[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 3 TABLE OF CONTENTS 1 INTRODUCTION ................................................................................................................... ..............7 1.1 A BOUT THIS M ANUAL .............................................................[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 4 6 TROUBLESH OOTING ................................................................................................................ ..... 24 6.1 O PERATIONAL P ROBLEMS ..................................................................................[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 5 Revision Description of Technical Manual Cha nge Date Issued A First release technical manual. Covers Revision A PCB’s ONLY . 12 Jan. 1999 B Second release technical manual. Covers Revision C and later PCB’s ONLY . 6 May 1999 C Add “View850” [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 6 Revision Description of Technical Manual Change Date Issued J 1.4 Product Application, Add warni ng to connect humi difier only to a pure sine wave po wer source 5.2 Safety Check, add CAUTION: and NOT E: 6.3 “See manual” Error codes, Elaborate th[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 7 Introduction 1.1 About this Manual This manual is intended for qualified servic e personnel who will perform maintenance and servicing on the Fisher & Paykel Healthcare MR850 Respiratory Humidifier. This manual covers the product specifications, [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 8 Expiratory Limb The section of the breathing circuit that takes th e expired gases from the patient. 1.3 Definitions NOTE : A NOTE provides important information or ex planation of procedures or conditions which may otherwise be misinterpreted or ove[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 9 2 Humidifier Symbols Caution: Hot surfaces may exceed 85 °C Power On/Off (stand by) Type BF Invasive Mode Attention – consult accompanying documents Non-invasive mode Alternating Current Temperature Alarm Drip proof protection to IPX1 Serial Port [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 10 3 Specifications 3.1 Mechanical Dimensions: 140 mm x 173 x 135 (without chamber fitted) Weight: 2.8 kg (without chamber fitted) Approx. 3.1 kg (with chamber fitted, and filled with water) 3.2 Electrical MR850 Model Number Supply Voltage Supply Curre[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 11 Non-heater wire operation: Invasive Mode: Airway temperature < 29.5 °C causes an audible and visible alarm. Non-invasive Mode: Airway temperature < 26.0 °C causes an audible and visible alarm. Sound Pressure Level: Alarms exceed 50 dBA @ 1 m[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 12 4 Operating Modes and Controls 4.1 Humidifier Operation The MR850 humidifier is designed to add heat and moisture to respiratory gases. The gas is passed through a humidification chamber where it is warmed and humidified. The MR850 has two heating s[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 13 4.1.2 Non-Heater Wire Operation (Software version 7.23 only) Figure 4.2 Typical Non-Heater Wire Humidifier Setup In this application the MR850 maintains the airway temperature at the desired set point (invasive 37 °C or non-invasive 31 °C) by heat[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 14 Stand-by (Software versions: 5.45 & 5.70) • Heater wire power is set at 30 %. • Control of chamber temperature is attempted, within the following limits: • Heater plate temperature is limited to 60 °C. • Heater plate power is limited to[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 15 then the chamber set point will automatically be increased in 0.5 °C steps (1 °C steps for non- invasive mode) until the minimum power is achieved. The maximum amount of compensation applied is either 3 or 5 °C depending on the mode and software [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 16 connected. Breathing circuit recognition is performed via three electrical connections on the heater wire adaptor. Re-configuring the electrical connection pins on a h eated circuit and the way it connects to this adaptor identifies the type of heat[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 17 4.2.3 Mute Button The mute button silences the humidifier's audible alarm. The muted time depends on the alarm condition. In general, alarms will be muted for 2 minutes. A chamber or airway probe alarm is muted for a longer time, until the humi[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 18 4.4.2 Temperature / Flow Probe Connector This indicator will light if the temperature probe is not corre ctly plugged in, or the probe used is faulty. The humidifier tests for the following probe fault conditions: • Temperature probe disconnected [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 19 4.4.5 Water Out Indicator This indicates that there is insufficient water in the humidification chamber. The humidifier measures the amount of power used to obtain the chamber temperature. If a lower than expected amount of power is used, a 'wa[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 20 Figure 4.3 Temperature vs Time to Alarm Pressing mute during a temperature alarm silences the alarm for half the normal time period, if the same temperature is maintained. The low temperature warning and alarm can be caused by cold or drafty ambient[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 21 5 Maintenance Procedures In order to keep your humidifier in good worki ng order, it is necessary to perform maintenance at regular intervals. 5.1 Maintenance Schedule 5.1.1 MR850 Humidifier Annually a. Check MR850 for physical damage: • Check the[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 22 5.2 Safety Check The unit should be tested to the current medical electrica l standards for in-house testing for each specific country (example, refer to AS/NZS 3551 for Australia and New Zealand). CAUTION: Permanent damage to this humidifier will r[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 23 5.3 Cleaning Instructions 5.3.1 MR850 Humidifiers It is recommended that only the following cleaners be used on the MR850 as at the time of revision of this technical manual. The disinfectants in the list below have been tested to ensure that no dam[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 24 6 Troubleshooting 6.1 Operational Problems This section deals with faults that cause the humidifier to alarm. This may be caused by incorrect setup, faulty accessories, or a faulty humidifier. Refer below for troubleshoo ting. Symptom Corrective Act[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 25 Symptom Corrective Action Reference Heater wire alarm not working Non-heater wire mode has been a ctivated, connect a heated wire circuit or disable this mode via the diagnosti c menu. Section 4.1.2 1. Check that the airway probe is inserted into th[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 26 Symptom Corrective Action Reference 1. Make sure the humidifier h as had time to warm up and that there is sufficient gas flow through the b reathing circuit. 2. The humidifier cannot maintain temperature. If the temperature indicator is also on the[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 27 6.3 “See Manual” Error Codes The following is an explanation of the error codes that are displayed in conjunction w ith the See Manual indicator flashing. A code is not displayed if the microprocessor has stopped functioning (see technical probl[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 28 Error Description of Fault E41 Failed the functional test at time of manufacture E42 Was not stress tested during manufacture E43 Failed the stress test during manufacture E44 Not tested on functional tester 2 E45 Failed production functional tester[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 29 6.4 Diagnostic Menu By pressing the mute and mode buttons together for 1 second, the diagnostic menu is entered, indicated by the display of two rows of dashes ‘= = =’. Releasing both bu ttons will allow the diagnostic menu to cycle automaticall[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 30 6.4.2 Diagnostic Menu for Software Version 6.00 Display Description HC Humidity Compensation (HC) algorith m Invasive mode, compensation range is 0.0 to 3.0 °C ( CSP = 37.0 to 40 °C ) Non-Invasive mode, compensation ran ge is 0.0 to 5.0 °C ( CSP [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 31 6.4.3 Diagnostic Menu for Software Version 7.00 & 7.21 Display Description HC Humidity Compensation (HC) algorith m Invasive mode, compensation range is 0.0 to 3.0 °C ( CSP = 37.0 to 40 °C ) Non-Invasive mode, compensation ran ge is 0.0 to 5.0[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 32 6.4.4 Diagnostic Menu for Software Version 7.14 Display Description HC Humidity Compensation (HC) algorithm Note: HC is inactive while operating under non-he ater wire control. Invasive mode, compensation range is 0.0 to 5.0 °C ( CSP = 37.0 to 42 ?[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 33 6.4.5 Diagnostic Menu for Software Version 7.22 Display Description HC Humidity Compensation (HC) algorithm Note: HC is inactive while operating under non-he ater wire control. Invasive mode, compensation range is 0.0 to 5.0 °C ( CSP = 37.0 to 42 ?[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 34 6.4.6 Diagnostic Menu for Software Version 7.23 Display Description Cct Connected breathing circuit identification: “S“ = Standard inspiratory heater conn ected “C” = Coaxial inspiratory heater connected “E” = Expiratory heater connected[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 35 7 Servicing Procedures 7.1 General Considerations WARNING: Although the MR850 display may not be illuminated, the unit may still be energized. Be sure to disconnect the MR850 from the power supply before servicing. All servicing procedures should be[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 36 Figure 7.2 Showing PCB fasteners 7.2.2 Replacing Fuses 1. Open the case (section 7.2.1). 2. The fuses can now be accessed. See Figure 7.3 for the location of the fuses on the power PCB. Figure 7.3 Showing location of the fuses on po wer PCB The four[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 37 MR850 Model Number Supply Voltage Fuse Type Part Number MR850Jxx 115 V~ F1: 1 A 250 V FastBlow F2: 4 A 125 V FastBlow F3: 3 A 250 V FastBlow F4: 3 A 250 V FastBlow 999 830 001 999 830 017 999 830 012 999 830 012 MR850Gxx 100 V~ F1: 1 A 250 V FastBlo[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 38 Figure 7.4 Showing Humidifier Power PCB w iring 7.2.4 Replacement of Transformer 1. Open the case (section 7.2.1). 2. Disconnect the transformer primary and secondary harnesses attached to the power PCB. 3. Unscrew the four mounting screws fixing th[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 39 3. If the thermal cutout "clicks" when pushed, it has been previously activated, and is now reset. NOTE : If the heater plate is still hot, it must be allowed to cool suf ficiently before the thermal cutout will reset. 4. Close the case (s[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 40 Figure 7.7 Showing location of Heater Plate Thermistor Thermal Cutout and Element Scre ws 8. Solder the wires from the new harness to the heater plate thermal cutout. 9. Attach the cable ties provided to the heater plate harness. 10. Place heater pl[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 41 5. Remove the heater element, leaving the mica insulator in place. 6. Insert the new element into position, making sure the insulating mica is between the element and the heater plate. 7. Replace the element cover, using the four screws that were pr[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 42 7.2.6 Installing New Software NOTE : A software upgrade kit is required. Some software may not be available in your country. Refer to your local Fisher & Paykel Healthcare representative for the appropriate part number: Single ROM pack 32 ROM Pa[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 43 6. Apply mains power to the humidifier, while keeping the production test button depressed. The display should read: “PTS”. This ensures that the new software version number will be properly updated in the EEPROM. 7. Turn off the mains power to [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 44 8 Performance Testing This section discusses the performance testing of the MR850 humidifier and also the MR850 temperature / flow probe. Performance testing is required as part of ongoing maintenance or after servicing of the humidifier has been co[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 45 1. Hold down the power button, then apply mains power to the humidifier. This action places the humidifier into service mode. 2. Select service mode number 1 (Calibration Probe #1 Check) by pushing the mute button when '-1-' is displayed. [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 46 8.1.4 Humidifier Voltage Calibration Check This check is required when the humidifier's PCBs have been serviced or replaced, or if the mains transformer has been replaced. Equipment Required: • An AC voltmeter, capable of measuring RMS mains [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 47 3. Connect the humidifier chamber inlet to the gas supply, and turn the humidifier on. 4. Wait approximately 30 minutes for the humidifier to stabilise. Chamber and Airway temperatures can be check ed by using the display mode (section 4.3.1) and se[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 48 1. Perform a humidifier calibration check as outlined in section 8.1.2 (ignore this step if recently completed). 2. Set up the humidifier as shown in Figure 4.1. Make sure the chamber probe is correctly inserted into the breathing circuit. 3. Connec[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 49 9 Recommended Maintenance Checklist This sheet can be copied and used to keep a record of the maintenance procedures carried out on your MR850 Humidifier(s), and probes. Place the serial number and the date that the maintenance was carried out in th[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 50 (Blank)[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 51 10 Spare Parts Should any parts of the humidifier requ ire replacement, the following parts list is provided. Refer to the exp loded diagram on the opposite pa ge for part identification. Item Part Number Description 1 043 041 247 100 V~ Heater Plat[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 52[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 53 Heater Plate Assembly Item Part Number Description 1 614 040 861 Screw (M4x12) 2 641 040 829 Reflector 3 336 060 149 Reflector Spacer Washers 4 641 040 707 Element Cover 5 331040 114 Mica Insulator 6 614 040 327 Thermistor Screw 7 614 040 117 Earth [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 54[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 55 11 Calibration Probe The information presented here refers to the construction of the MR850 Calibration Probe. This information is provided so that the probe can be checked for correct oper ation if required. The calibration probe consists of two Re[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 56 12 Serial Port & Logging Software 12.1 INTRODUCTION The View850 software* is intended for use with the Fisher & Paykel Healthcare MR850 Respiratory Humidifier. The software can be used to display humidifier data and log the results to a file[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 57 12.3.2 Logging Humidifier Data to File The View850 software can log the data it receives to a text file. This text file can then be opened at a later date (by programs such as Microsoft Excel), in order to review humidifier performance. In order to [...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 58 13 EMC INFORMATION WARNING: The use of accessories other than those specified by Fisher & Paykel Healthcare may result in increased emissions or decreased immunity of the equipment or system. Guidance and manufacturer’s declar ation – electr[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 59 Guidance and manufacturer’s declar ation – electromagnetic immunity The MR850 is intended for use in the electromagnetic environment s pecified below. The customer or the user of the MR850 should assure that it is used in such an environment. Im[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 60 14 Product Change History Due to upgrades performed on delivered MR850 Respiratory Humidifiers, software and hardware versions are listed below. It should be realised that possible future upgrades may change the operation of the Humidifier. Please n[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 61 History Change for model GJU PCB Version Software Version Introduction Serial Number Comments A 4.40 19 September 1998 9885xxx00000 First production release. A 4.44 22 October 1998 Software upgrade. C 5.12 12 April 1999 9985xxx00053 Release of new P[...]

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 62 History Change for all model except JHU & GJU PCB Version Software Version Introduction Serial Number Comments A 4.40 19 September 1998 9885xxx00000 First production release. A 4.44 22 October 1998 Software upgrade. C 5.12 12 April 1999 9985xxx0[...]