Erbe 10128-002, Instruction Manual

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4-13
Checking for a short in the connecting cord
In order to be sure there is no short in the connecting cord proceed as follows:
a) In the case of return electrodes without a permanently connected cord
Switch on the unit. Plug the connecting cord into the socket for the return electrode. The green
NESSY signal (LED) must NOT be lit. Only connect the cord to the return electrode when this
has been checked.
b) In the case of return electrodes with a permanently connected cord
Switch on the unit. Plug the connecting cord into the socket for the return electrode. The green
NESSY signal (LED) must NOT be lit. Only apply the return electrode when this has been
checked on the patient.
4.3.4 Protection against operating error
To prevent operating errors, the front panel is designed in such a way that illogical and/or
incomplete settings are automatically monitored and signaled.
The female connector beneath the front panel contains all the connecting sockets for the applied
part.
These connecting sockets are designed in such a way that only plugs from intended accessories
can be inserted (provided that only accessories recommended or supplied by the manufacturer of
the unit are used).
Each time after switching on the power switch, an automatic test program is started within the
unit which recognizes and signals the following errors in the operating controls for the unit and
for accessories connected to the unit:
1. If a key on the front panel is shorted or pressed due to an error when the power switch is
switched on, this error is indicated acoustically and by an Error Number after the power
switch has been switched on.
2. If a key on the electrode handle is shorted or bypassed at low resistance due to an error
(e.g. by moisture in the electrode handle) or pressed while the power switch is switched
on, this error is signaled acoustically and indicated by an Error Number after switching on
the power switch.
3. If a footswitch contact is shorted due to an error, a pedal sticks or a pedal is pressed while
the power switch is switched on, this error is indicated acoustically and by an Error Number.
CAUTION!
Every function field can only then be activated if it has been completely set. If an attempt is
made to activate a function field which has not or not completely been set, the unit produces an
intermittent acoustic warning signal and indicates this operating error by illumination of the
triangle symbols on the corresponding function field.