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MR810 Technical Manual Revision C REF 185042601
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1 GENERAL INFORMATION
1.1 INTRODUCTION
This manual is intended for use by qualified service personnel w ho will service and maintain the Fisher &
Paykel Healthcare MR810 Respiratory Humidifier. This manual covers the following:
• Specifications
• Operation of the MR810, and controls
• Maintenance procedures
• Troubleshooting
• Servicing (full diagrams and parts list are in the appendices)
• Electrical safety test procedures
1.2 GLOSSARY OF TERMS
Ambient sensor A thermistor located in the heater-wire adaptor that allows the
humidifier to monitor the ambient temperature.
Breathing Circuit Tubing which carries respiratory gases from the chamber to the patient.
Chamber Vessels containin g wat er i n which gas is heated and humidified by
passing it over the heated wat e r.
Heater-wire Wire inside the breathing circuit that heats the respiratory gases to
minimise condensation.
Heater-wire Adaptor Electrical connection between the humidifier and the breathing circuit.
Humidifier The device which is used to heat the chamber to humidify the
respiratory gas.
Inspiratory Limb The section of the breathing circuit that takes inspired gases to the
patient.
PCB Printed circuit board.
Respiratory gas Gases breathed in by the patient.
Single Heated Breathing Circuit A breathing circuit that has the inspiratory limb heated by a heater-
wire.
Thermistor A resistive device used to measure temperature.
1.3 DEFINITIONS
NOTE: A NOTE provides important information or explanation of procedures or conditions that may
otherwise be misinterpreted or overlooked.
Caution
A CAUTION statement designates the possibility of damage to this or other equipment if a
procedure is not followed exactly.
WARNING:
A WARNING statement refers to conditions with a possibility of personal injury if a
procedure is not followed exactly.