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OPERATION
MUTE
The mute button silences the humidifier's
audible alarm for at least two minutes. The
muted time depends on the alarm condition
and the severity of its cause.
SET-UP INDICATORS
Chamber & Airway Probes
Lights if either the chamber
probe or the airway probe is not
inserted into the breathing
circuit correctly.
Heater Wire
Lights if the heater wire adaptor
or breathing circuit has not been
connected, or is damaged.
Temperature Probe
Lights if the temperature probe
is not correctly plugged into the
MR850, or the probe is faulty.
Water Out
Lights when there is insufficient
water in the chamber. Check
water supply. Maximum time to
alarm of 20 minutes.
See Manual
The humidifier and all
accessories should be
immediately replaced and sent
for servicing.
TEMPERATURE DISPLAY
Displays the saturated gas temperature (the
lower of the airway and chamber temperatures
in °C) delivered to the patient. This display will
normally show the chamber temperature
(around 37 ± 0.5 °C for invasive mode, and
31 ± 0.5 °C for noninvasive mode).
By pushing and holding the mute button for
one second, the chamber outlet temperature
then the airway temperature is displayed. The
display will then revert to normal operation.
LOW TEMPERATURE ALARM
An audible alarm and flashing temperature
display showing 35.5 °C or lower (in invasive
mode only). Caused by cold/drafty conditions
or very high or low gas flows.
If the circumstances causing the low humidity
alarm cannot be changed then the audible
alarm acts as a reminder that the patient is
receiving inadequate humidity and may require
further intervention to maintain airway
clearance.
HIGH TEMPERATURE ALARM
A flashing temperature display showing 41 °C
or higher. The humidifier will discontinue
heating of the chamber and circuit until the
tem
p
erature decreases to within normal limits.
MODE BUTTON
This button switches between invasive and
noninvasive mode.
Invasive Mode
This mode is for patients with
bypassed airways. The humidifier
delivers gas as close to body
temperature saturated (37 °C,
44 mg/L) as possible.
Under cold or drafty conditions the chamber
temperature may drop as low as
35.5 °C in order to maintain a dry breathing
circuit.
Noninvasive Mode
This mode is for patients receiving
face mask or headbox therapy,
and delivers a comfortable level of
humidity.
ON/OFF BUTTON
The humidifier will power ON if this button is
held down briefly, but must be held down for
one second to turn the humidifier off. The
humidifier will always default to invasive mode
when it is turned on.
ROUTINE MAINTENANCE
Refer maintenance to qualified service
personnel. A full technical description including
routine maintenance and service data is
contained in the Technical Manual which is
available from your supplier or Fisher & Paykel
Healthcare (REF 185041340)
WARNING: Ensure that invasive mode is
set for patients that have bypassed airways
A
B
C
D
E
F
G
H
1.
2.
3.
4.
5.
6.
SET UP
Slide humidification chamber (A) onto humidifier base and connect breathing circuit (B) (refer to humidification chamber and breathing
circuit operating instructions for further details).
Connect the temperature probe plug (C) (REF 900MR86X) to the blue socket on the humidifier base until an audible click is heard.
Push the chamber probe (D) and airway probe (E) into the breathing circuit. Make sure the chamber probe is correctly located in its key-way
and that both probes are pushed home. The probe lead can be restrained using breathing circuit clips.
Connect the heater wire adaptor plug (F) (REF 900MR8XX) to the yellow socket on the humidifier base until an audible click is heard.
Connect the other end(s) of the heater wire adaptor to the breathing circuit socket(s) (G) and (H).
The humidification system is now set up and ready for use. After power on, the humidifier will default to invasive mode.
ATTENTION: Refer to operating instructions which accompany each accessory.
THE FOLLOWING
ACCESSORIES ARE
REQUIRED:
• Humidification Chamber
(e.g: MR290)
• Breathing Circuit
(e.g: RT110)
• Temperature Probe
(e.g: 900MR869)
• Heater Wire Adaptor
(e.g: 900MR800)
• Mounting Bracket
(to suit ventilator)
Choice will depend
upon application.
Please contact your local
Fisher & Paykel Healthcare
representative for
recommendations.