Filter
Top Products
3
Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001
2.0 OPERATING CONTROLS AND MODES _____________________________
2.1 ADJUSTABLE CONTROLS
2.1.1 AIRWAY 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.
2.1.2 CHAMBER 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.
2.2 PUSH SWITCHES
2.2.1 MUTE 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.
2.2.2 CHAMBER 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).