Ohmeda Ohio Care Plus, Operation And Maintenance Manual

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5-6
5/Using the Incubator
5-6
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• 30 second operator Prompt tone
On controllers with serial numbers beginning with HBJ and HCE, all silenceable
alarms are preceded by a 30 second operator prompt tone, in order to minimize
disturbance to the infant.
Air circulation alarm
Air is not circulating through the incubator. The most common cause is a missing fan
or a fan that is not rotating.
If the alarm continues, stop using the incubator and call for service.
Control temperature alarm
The air temperature is 1.5°C above or 3.0°C below the air control temperature (air
control mode alarm).
The control temperature alarm is automatically silenced for 30 minutes after you switch
on the unit and for 15 minutes after you change the control temperature or switch to
the air control mode.
1. Evaluate the patient:
• Opening the incubator door causes some heat loss.
• If the incubator starts out cold, or you make a large change in the control
temperature, the incubator may take longer than the automatic alarm silence
period to warm up.
2. If the alarm continues, stop using the incubator and call for service.
High air temperature alarm
The air temperature exceeds fixed limits:
Control High Temperature
Mode Temperature Alarm Limit
Patient Control Entire Range 40.0°C (104.0°F)
Air Control 20.0 to 37.0°C 38.0°C (100.4°F)
(68.0 to 98.6°F)
37.0 to 39.0°C 40.0°C (104.0°F)
(98.6 to 102.2°F)
1. Evaluate the patient:
• Have you changed the air control temperature? In the air control mode,
decreasing the control temperature below 37.0°C decreases the alarm limit
from 40°C to 38°C. Making this change while the incubator temperature
exceeds 38°C triggers the alarm.
• Have you changed operating modes? The same thing can happen if you switch
from the patient control mode (alarm limit 40°C) to the normal air control mode
(alarm limit 38°C).