Fisher & Paykel MR730, MR720, MR480, MR700 technical manual Operating Controls and Modes

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2.0OPERATING CONTROLS AND MODES _____________________________

2.1ADJUSTABLE CONTROLS

2.1.1AIRWAY TEMPERATURE CONTROL

Selects the airway controlling temperature. The range of adjustment is from 31 to 40 °C over a linear scale marked in degrees on the front panel.

The temperature can be set with a resolution of 0.1 °C. The set temperature is flashed on the display when the control knob is rotated and continues to be flashed for five seconds after the last adjustment.

2.1.2CHAMBER CONTROL (HEATER WIRE ON MODE ONLY)

The temperature of the gas leaving the chamber is regulated by the Chamber Control knob, it sets the difference between the chamber outlet temperature and the airway temperature delivered to the patient. The setting of the Chamber Control, when added to the setting of the Temperature Control, determines the chamber outlet set temperature. This Chamber Control has a linear range of adjustment from -5 to +2 °C marked in one degree steps and can be set with a resolution of

0.5°C. The value is flashed on the Airway display as the control knob is rotated and continues to be flashed for five seconds after the last adjustment.

Every humidifier is also supplied with a fixed chamber control knob. This prevents inadvertent adjustment of the chamber control by preadjusting the existing knob to the desired setting and then replacing the normal knob with the fixed knob.

2.2PUSH SWITCHES

2.2.1MUTE BUTTON

A momentary push will disable an audible alarm for 3 minutes (except low temperature alarm in non heater wire mode which is 10 minutes).

A secondary function is that in conjunction with the Chamber Temp switch enables entry to the engineering menu (refer Appendix A2).

On every initial push of the mute button a momentary audio beep indicates function operation.

2.2.2CHAMBER TEMP BUTTON

MR700 Series Humidifiers with Version 1.0 Software:

Operation of this switch causes the airway temperature display to momentarily blank then show the chamber outlet temperature. A green LED adjacent to the switch is enabled to indicate that this function is active. On release of this switch the display reverts immediately to show the airway temperature.

This button is used in conjunction with the mute to enter the engineering menu (refer Appendix A2).

MR700 Series Humidifiers with Version 2.0 and Version 3.0 Software:

Operation of this switch causes the airway temperature display to momentarily blank then show the chamber outlet temperature. A green LED adjacent to the switch is enabled to indicate that this function is active. On release of this switch the display continues to show the chamber outlet temperature for 2 seconds before blanking momentarily and reverting to show the airway temperature.

This button is used in conjunction with the mute to enter the engineering menu (refer Appendix A2).

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