Erbe ERBOTOM ICC 350 M, Instruction Manual

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4-16
4.3.3 Unit-related output error
The ICC is equipped with automatic monitoring of the HF output
parameters, which monitors deviations in the actual value from the
set value for the currently set HF output parameters and produces a
warning signal and/or switches off the HF generator if the deviation
is so large than the required quality of the respective effect (cutting
or coagulation) is no longer ensured. In case of deviations or absence
of the required effect, display of a unit-related output error allows
the operator to immediately check whether the defect is caused by
the unit or not.
Deviations in the HF output parameters from the currently set HF output parameters on the ICC
can only result from loads which have too low a resistance, e.g. coagulation electrodes that are
too large, a short circuit between the active and neutral electrode, or due to an error in the unit.
In practice, despite careful positioning of the patient on the operating table, unintentional contact
of the patient with electrically conductive objets can occur. In some operations, such contacts
are unavoidable.
The ICC is therefore equipped with an HF leakage monitor, which automatically monitors the
HF leakage current and generates a visible warning signal if the HF leakage exceeds 150 mA
eff
.
If the HF leakage current exceeds 300 mA
eff
, the HF leakage monitor additionally produces an
acoustic signal. If the acoustic signal is heard, the operator should then only continue to use
high-frequency surgery if, for example, an incision or a hemostasis has absolute priority.
4.3.4 Time limit
With normal use, a high-frequency generator is only activated briefly
for performance of an incision or a coagulation by fingerswitch,
pedal or AUTO START. This generally lasts only a few seconds.
Through an error in the unit, in the accessories or in use, the high-
frequency generator can be switched on unintentionally. To prevent
greater damage due to unintentional activation of the high-frequency
generator, the ICC is equipped with a monitor which automatically
monitors the time limit on the high-frequency generator. Once a
predetermined maximum time limit has been exceeded, this monitor
generates a visible signal. If the high-frequency generator is then
not switched off, the generator additionally produces an acoustic signal and automatically switches
the HF generator off. The high-frequency generator can however be restarted at any time, whereby
the time limit is also monitored anew. In this way, greater damage due to unintentional activation
of a high-frequency generator for undeterminably long times is avoided.