3 Functionality
900-301_IFU-V2.2_11316-S0-20131023-EN Operating Manual ARC 250 / 303 25
3. Functionality
The HF device is controlled by a microprocessor and converts the mains
voltage into a high-frequency alternating current for monopolar or
bipolar applications.
The "ARC Control" regulator reduces the output power to the minimum
level necessary, depending on the tissue and its resistance.
Pos: 15 /679-BOW A/HF-Geräte/ ARC 200/250/3 00e/3 Fun ktionsweise/Monopol are Modi @ 7\ mod_130949 5624646_6.doc @ 52380 @ 23 3333
3.1. Monopolar modes
In monopolar operation, the HF device has the following operating
modes:
"Cut" for cutting in low-resistance tissue
"Moderate Coag" for contact coagulation
"Forced Coag" for coagulation with light contact
"Spray Coagulation" for contactless surface coagulation
Instruments can be connected to monopolar output (socket
connector 29/30).
3.1.1. "Cut" mode
In this mode a powerful HF current with a low crest factor is used for
cutting in biological tissue. The maximum power is 250 W with the
ARC 250, or 300 W with the ARC 303. The ARC CONTROL regulator
quickly adjusts the output power to the minimum level necessary in
response to variations in the tissue and changes in the cutting surface
or cutting speed.
When setting the blend function between level 0 and 9, it is possible to
set a variably adjustable degree of surface scabbing.
3.1.2. "Moderate Coag" mode
This mode is used in contact coagulation for stopping hemorrhagic
oozing, hemostasis of larger tissue areas, and coagulation over smaller
surfaces.
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