Fisher & Paykel MR700, MR720, MR480 technical manual Dynamic Test Sequence MR730/720/700

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3Connect the Heater Wire cable to the humidifier.

4If a gas supply is used, set to 5- 10 l/minute, if no gas supply used, the breathing tube should be supported from the patient end so that it drops vertically over its entire length to the top of the chamber.

E.2.3 DYNAMIC TEST SEQUENCE (MR730/720/700)

1Turn the humidifier on, ensure the heater wire LED is on for a MR720 or MR730.

2Adjust set temperature to 36.0 ± 0.1 °C and Chamber Control to 0.

3NOTE: At low ambient temperatures (below 22 °C) a low temperature alarm may occur, if this occurs, press mute and restart the test , the breathing circuit will eventually warm up and the humidifier will start controlling.

4Check after 30 minutes:

Digital display is 36.0 ± 0.3 °C

Chamber outlet temperature is 36.0 ± 2.0 °C

If the unit is alarming or has not reached 36 ± 0.3 °C, press the mute button if necessary and leave for a further 15 minutes.

5

Then check the following in ‘Engineering Mode’ (see appendix A2):

 

set

36 ± 0.1 °C

 

offset

0

 

Edc

≥ 0

 

Cdc

≥ 0

 

hp

≥ 36 °C

5If unit passes this test it is controlling correctly and can be put back in use.

E.3 PERFORMANCE CHECK (MR480)

E.3.1 EQUIPMENT SETUP

Set up a non heated breathing circuit, see typical setup below:

Setup Notes:

Patient delivery tubing can be single use or reusable.

A gas supply of 2 – 10 l/minute to the chamber is recommended, if no gas supply is used, then the breathing circuit must be 22mm diameter to ensure adequate airflow.

Use a dual airway temperature sensor, such as 900MR560.

Use a Fisher and Paykel humidification chamber, such as a MR200 series, filled with cold water to maximum level (not a MR290).

Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001

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Contents Auckland, New Zealand D E L S MR730 MR720 MR700 MR480National Office Revision F changes Section Description of ChangeContents Performance Check MR480 Dual Probe Temperature Test10.1 Power PCB Harness Connection DiagramMaintenance Schedule B1.1 Maintenance Schedule ChecklistAppendix D Models MR730/720/700 MR700 Series General SpecificationsRSD EOHSET TOPMR700 Series Humidifiers with Version 1.0 Software Operating Controls and ModesStandby Button MR700/720/730 only 1 MR700/MR730 ALL Software VERSIONS, MR720 Version 1.0 only 2 MR720 Version 2.0, 3.0 SoftwareAlarms and Indicators Version 3.0 Software Version 1.0 and Version 2.0 SoftwareAudio Alarm Circuit Operation Power Line Interrupt Revisions D/F Pcbs Revision H and J Pcbs For models with Revision D PCB and earlier CalibrationPage Performance Check Alarms Check MR700/720/730 Dual Probe Temperature Test Servicing Information Replacing revision F or earlier power PCB MR700/720/730Replacing revision F or earlier power PCB MR480 Fault Location SCHEMATICS, Part Lists and Mechanical Drawings Power Board Control Board Component Layout Revision F PCB Page This page Left Blank Circuit Diagrams Revision H and J PCB Control PCB Circuit Diagrams Revision H and J PCB Power PCB Circuit Diagrams Revision F PCB Control PCB Circuit Diagrams Revision F PCB Power PCB LED6,LED7 LED8,LED9,LED10 DSP1, DSP2, DSP3LED1, LED3 LED2,LED4, LED5,LED11VR4 SW5SPK1 VR1Fuse fast acting 2 a 20 × 5 mm for 230 999830009 MR480AGM Exploded Diagrams MR480 10.3 MR730/720/700 Mechanical Parts MR720ASU Exploded Diagrams MR730/720/700 Heaterplate Assembly Parts MR730/720/700/480 Page PCB Identification Diagram Power PCB Harness Connection Diagram Date Change First Serial Number Comments Affected Product Change HistoryYear Model Code Serial Number AAA XxxxxOFF Appendix aA2.3 Integral Display Error MessagesEP4 EP1EP2 EP3First Byte Second ByteThird Byte A5.4 Serial Data Interface Connector Appendix B B1 Maintenance ScheduleElectrical Safety Checks as required Photocopy and File in Maintenance RecordsPossible cause Action to take Appendix CHigh Temperature C1.6 C1.5LED on Check Voltage Rating Of Unit Appendix D Cleaning instructionsAppendix E Setup NotesDynamic Test Sequence MR730/720/700 Dynamic Test Procedure MR480