Description; Principle Of Operation - Dräger 8000 IC Operating Instructions Manual

Principle of Operation

Description

Description
Principle of Operation
Heated and humidified air flows into the hood over the full
width of the incubator. It is channeled up the front door,
along the roof of the hood, and then drawn down along
the rear wall via suction.
The baby lies in an area with very little air flow, so that
heat loss from convection is minimal.
When opening the hand ports, an effective warm air
curtain is retained minimizing cooling of the inside of the
incubator.
The mattress is made of soft foam plastic encased in film,
with low conductive heat loss for the patient.
Humidity
The incubator air is humidified hygienically by evaporation
of boiling water from a water container.
Humidity can be set manually between 30 and 85 %.
Control
A microprocessor controls the incubator. When it is
switched on, and every 10 minutes thereafter, the
incubator automatically performs a general self-test. This
test checks all safety relevant components.
The heating system is switched off automatically if
operating conditions are outside permitted limits.
An auxiliary cooling fan cools the air effectively as soon
as the measured value of air temperature exceeds the set
value.
Safety features
After being switched on, the incubator performs a self-
test involving a check of all memories in the micropro-
cessor control system and a check to establish whether
the various program segments are running correctly.
The function of actuators, feedback signals, and displays
is checked by switching them on and off. This test is also
repeated every 10 minutes during operation, testing all
modules installed in the incubator. An error message is
generated for a defective module, even if it is switched
off.
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