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MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041340 (185041713 internal)
34
6.4.6 Diagnostic Menu for Software Version 7.23
Display Description
Cct Connected breathing circuit identification:
“S“ = Standard inspiratory heater connected
“C” = Coaxial inspiratory heater connected
“E” = Expiratory heater connected
“---” = No heaters detected while under heater wire control
Non-Heater Wire Operation
To enable non heater wire operation, press and hold both the mute and mode
buttons simultaneously for 1 second. The display will show ‘nhh’ and the humidifier
will confirm with an audible beep. Ensure that no heated breathing circuit is
connected to the humidifier otherwise the humidifier won’t change operation.
To disable non-heater wire mode, repeat the above process or connect a heater
breathing circuit.
CSP Chamber set point, in 0.1 °C resolution eg: 37.0
Invasive mode: range 35.5 to 42 °C.
Non-Invasive mode: range 31.0 to 36.0 °C.
Cdc Chamber Duty Cycle (%)
During selection of this menu and while a chamber probe out test is active the
chamber probe indicator will light.
CHP Chamber Power / Flow ratio (W/LPM)
hP Heater Plate Temperature (1 °C)
Flo Gas Flow Rate (0.1 LPM)
“---“ = Unknown Flow (flow measurement not started)
FLr Gas Flow Rate Range:
“---“ = Unknown Flow (flow measurement not started)
“no” = No flow, ( Stand-by )
“Lo” = Low flow, ( < 3 LPM )
“In” = Intermediate flow, ( 2 to 17 LPM )
“Hi” = High flow, ( > 13 LPM )
“ -“ = Ventilated flow detected
ASP Airway temperature set point (0.1 °C)
Adc Airway Duty Cycle (%)
During selection of this menu and while an airway probe out test is active the airway
probe indicator will light.
H2O
Water out number, used to detect the presence of chamber water, calculated from,
chamber power / (heater plate temp. – chamber temp.).
During selection of this menu the water out indicator will light if the water out
number falls below a dry chamber threshold.
LAS
Last Alarm State, the display will blank, and the humidifier’s last alarm will be shown
on the indicators. To clear LAS, press and hold the mute and mode buttons for 1
second. The humidifier will beep when LAS has been cleared.
LFS
Last Fault State, refer to section 6.3. To clear LFS, press and hold the mute and
mode buttons for 1 second. The humidifier will beep when LFS has been cleared.
SoF Software version
End
Press the mute button to cycle to the start of the menu, or the diagnostic menu will
automatically exit after 6 seconds.