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Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001
APPENDIX E _________________________________________________
E1 ADDITIONAL DYNAMIC PERFORMANCE CHECK OF HUMIDIFIERS
This procedure is optional and may be used to check the dynamic operation of MR730/720/700 and MR480 humidifiers.
This performance check can be performed if there is any doubt about the operation of the humidifier, such as after any
servicing involving the printed circuit boards.
For normal routine maintenance checks only the tests detailed in Section 6 are required.
For the Dynamic Tests, the humidifier is controlled from an airway temperature probe to achieve a set temperature.The
purpose of this test is to show that the humidifier control systems are working to maintain delivered air temperature to
the set temperature.
E2 PERFORMANCE CHECK MR730/720/700
E2.1 EQUIPMENT SETUP
Set up a 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 tube
must be 22mm diameter to allow adequate airflow.
♦ Ηeater wire assembly can be single use or reusable, dual heated or single limb. Total power less than 60 Watts. If a
single use circuit is used then an air flow of at least 2 litres/min is necessary.
♦ Use a dual airway temperature sensor, such as 900MR560.
♦♦ Use any Fisher and Paykel humidification chamber, filled with cold water to maximum level.
E.2.2 SETUP
1 Slide the full humidification chamber on to the heaterbase.
2 Insert the middle sensor of the temperature probe into the heater wire module, and the end sensor of the
temperature probe into the connector at the end of the delivery tube, plug the temperature probe plug in to the
humidifier .