Instructions for Use Neonatal Intensive Care System VARIOTHERM REA-KCE
D 2002_01.doc
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Functional processes and alarms
Display
Sequence of functions
Alarm
Heating-up
After switching-on the device with
button (6.2) the heating elements will
warm up. The desired radiation
intensity (6.12) can be selected with
knob (6.13). The heating-up state is
obvious from the actual intensity
display (6.12b). Depending on the
selected intensity and the ambient
temperature the heating-up time will
be between 3 and 15 minutes.
The bottommost field of the actual
intensity bar graph (6.12b) flashes
until the selected intensity (6.12a) is
reached. During the heating-up period
an audible alarm will only be released
after 15 minutes. If this is the case,
low ambient temperature or a failure
in the heating system could be the
reason. The audible alarm can be
reset for 15 minutes with button (6.4).
Normal operation up to 10 mW/cm²
Radiation intensity up to 10 mW/cm²
cannot cause any problems and
under normal conditions it is suffi-
cient to maintain the body tempera-
ture of healthy normal-weight infants.
During normal operation the topmost
field of bar graph (6.12b) is at the
same vertical position as the LED for
selected intensity (6.12a).
No alarms
Increasing the radiation intensity
By turning the knob (6.13) clockwise
the radiation intensity will be
increased.
Each adjustment is
confirmed by a short tone.
The
selected intensity is indicated in LED
(6.12a). Corresponding to the
heating-up state, the bar graph
(6.12b) indicates the emitted radiation
intensity. The selected intensity is
reached when the topmost field of the
bar graph (6.12b) has reached the
topmost spot of LED (6.12a).
When the emitted radiation intensity is
lower than the selected intensity, a
low intensity alarm is released.
However, the device recognizes the
conscious intensity increase and
therefore only a visual alarm is
released by flashing of the bottom-
most field of bar graph (6.12b). When
the new selected intensity is reached,
this flashing field will extinguish. Only
if it will not be reached within 15
minutes, the low intensity alarm will
sound. This audible alarm can be
reset for 15 minutes by button (6.4).
Exceeding the maximum intensity
selection
A maximum intensity of 22 mW/cm²
can be selected. If the intensity knob
(6.13) is set to a value, which the
radiant warmer is unable to reach,
the maximum possible intensity
selection is indicated in LED (6.12a)
by a permanent spot. The (un-
reachable) selected intensity is
indicated in LED (6.12a) by a flashing
spot.
Optical, as described.
