Erbe ERBOTOM ICC 350 M, Instruction Manual

Page: 39 / 100

4-19
WARNING
For reasons of safety, a change to NESSY may only be made if it has been properly ensured that
all users of this unit are informed in good time about this change. In addition, a change to
NESSY must be properly documented.
When using dual-surface neutral electrodes, NESSY also monitors the application direction of
the contact surface relative to the direction of current flow. Since the high-freqeuency current is
generally not distributed evenly over the contact surface of the neutral electrode, but rather can
be greater at the proximal corners or edges to which the current flows than at the distal corners or
edges, attention should always be paid during application of neutral electrodes that the current
flows toward the long edge.
NESSY compares the intensity of the two partial currents I
1
and I
2
of the high-frequency current
I
HF
, which flow through the two partial surfaces of the neutral electrode. If the partial currents I
1
and I
2
deviate from one another, the red NESSY signal is illuminated. If the partial currents
deviate extremely from one another, the red NESSY signal is illuminated and at the same time
the NESSY warning signal is heard, and the HF generator is automatically switched off.
Neutral electrode suitable for NESSY - applied correctly
Neutral electrode suitable for NESSY - applied incorrectly