Theory of Operation
Chapter 3: Theory of Operation
Isolette® Infant Incubator (Model C2000) Service Manual Page 3 - 33
3
control point. If the oxygen concentration level rises above or falls
below the selected setpoint limits, an audible and visual alarm occurs.
Humidity Control Valve
The built-in humidifier provides humidification of the incubator from 30%
to 95% RH in 1% increments. The humidifier reservoir permits visual
inspection of the water level.
If the water level in the chamber is depleted, an audible and visual Low
Humidity alarm occurs, indicating a need to replenish the water supply.
Hardware
Weighing Mode
Two load cells in a platform under the mattress perform the actual
weighing function. These cells provide a voltage that is proportional to
the load on it. The controller processes the voltage and displays it in
either kilograms or pounds/ounces on the Weight display.
The weighing routine is initiated by placing the infant on the mattress. If
the infant is already on the mattress, lift the infant off the mattress; when
the system zeros, return the infant to the mattress to obtain the weight.
The Weigh key enables repeated weighing of the infant after the
weighing routine is initiated as described above.
Trend Displays
Four standard parameters are presented on Trend displays:
• Air temperature
• Skin temperature #1
• Skin temperature #2
• Heater power
Additional Trend displays are available when the unit is equipped with
any of the following options:
• Oxygen
•Weight
•Humidity
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