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Overview and Operation
Figure B. Model 775 Warming Unit – rear view
IV pole clamp
Hose
Hose connection
Power cord
connection
Figure A. Model 775 Warming Unit – front view
Alphanumeric
Display
Control Panel
Carrying
handle
Warming Unit Power-On-Reset
The Model 775 warming unit automatically performs the following
power-on-reset sequence after you connect the warming unit to a
properly grounded power source:
• Performs all self-test functions.
• Illuminates indicator lights and all pixels in the
alphanumeric display momentarily.
• Displays the text “MD 700’s” and the software revision
level in the alphanumeric display.
• Sounds the alarm (three low-level clicks).
• Enters the
Standby
mode with the high fan setting selected
by default.
Note:
The low fan setting indicator light will not illuminate during
power up.
If the warming unit loses power for less than 1 second, the warming
unit software will return the warming unit to the operating mode
you selected prior to the power loss. However, if the warming unit
loses power for longer than 1 second, the warming unit software will
reset when you restore power. The warming unit will then enter the
Standby
mode with the
high fan setting selected by default
.
Overview of Control Panel
775
OVER TEMP
FAULT
TEMP IN RANGE
TEMPERATURE
AIR FLOW
43
C
HIGH
43
C
38
C
MEDIUM
38
C
LOW
32
C
43
C
38
C
32
C
STADBY
AMBIENT
High Fan
Setting
Alphanumeric Display
Temperature
Modes
Low Fan
Setting
Figure C. Model 775 Warming Unit Control Panel
ALPHANUMERIC DISPLAY
The alphanumeric display shows the temperature at the end of the
Bair Hugger warming unit hose in degrees Celsius.
TEMPERATURE MODES
• Press the 32˚C (Low), 38˚C (Med), or 43˚C (High) button to
select the desired temperature.
• Press the Ambient button to supply room temperature air.
When you select a temperature mode, the following events occur:
• Corresponding temperature indicator and fan setting lights
illuminate.
• Blower operates at selected fan speed.
• Temperature at the end of the hose appears in the
alphanumeric display.
• Heater activates except in ambient mode.
• Temperature mode timer and hour meter activate.
• Temp in range indicator light illuminates when the
temperature at the blanket end of the hose is within
+/- 1.5°C of the selected setting; this indicator light does
not illuminate in the ambient mode.
AIRFLOW MODES
The Model 775 warming unit has two preset fan speed settings: a
default or high fan setting (
) and a reduced or low fan setting ( ).
The Model 775 warming unit will reset/default to the high fan setting
each time the warming unit is powered up or
Standby
is selected.
The low fan setting ( ) may be pre-selected while in
Standby
prior to
selecting the desired temperature.
STANDBY
Upon power up, the warming unit defaults to
Standby
and the high
fan setting. When the warming unit is in
32˚C
(Low),
38˚C
(Med), or
43˚C
(High) or
Ambient
mode, press the
Standby
button to place the
warming unit in
Standby
mode. When you select the
Standby
mode,
the following events occur:
•
Standby
indicator light illuminates.
• Blower and heater are turned OFF.
• Alphanumeric display deactivates.
• Alarm and fault detection functions remain active.
• Operating timer pauses.
• Airflow mode resets/defaults to the high fan setting.
