BIOMED SERVICE MANUAL Electrosurgical Generator G400 Workstation
Model 777000
Gyrus ACMI G400 Workstation
BIOMED SERVICE MANUAL
Page 11 of 57
Part Number: 177079-AA
Section V
SERVICE PROCEDURES
Periodic Service
Inspect the Generator and Footswitch for obvious signs of mechanical damage
or wear. Ensure that the generator case shows no sign of tampering. Evidence
of damaged casework needs to be investigated to ensure that the internals of
the generator are safe. Gyrus ACMI recommends the return of damaged
generators to an approved service centre. The Gyrus ACMISales
representative handling the generator account will be able to advise.
Check the generator back panel label is present and decipherable and that the
front panel markings and symbols are still legible.
Retract the fuse drawer of the mains inlet connector and verify that both fuses
are intact and match the rated current and breaking characteristics as per the
back panel label.
Switch on the Generator, ensuring that the initial internal Power On Self Test
(POST) is completed normally, as reported on the front panel display. Check
that the audio alarm, front panel warning indicator and vacuum fluorescent
display are functioning normally via the user verification sequence, which
follows initialisation.
All servicing activity should be documented in accordance with local
documented procedures. A typical format for service activity recording is
included in section VIII.
PKRF output & RF leakage checks general preamble
Whilst in standby mode, the generator constantly monitors the A and B RF
sockets to detect valid electrodes. The G400 generator has a number of
operating modes that have defaults depending on the value of capacitors
embedded in the applied electrodes. The connection of a valid electrode will
cause the generator to select the appropriate default power settings for that
particular electrode. Alternative power settings and modalities within a certain
range may be alternatively selected by the user. The G400 generator identifies
electrodes with an internal oscillator that changes frequency depending on the
value of capacitance in the applied electrodes. To be able to measure the RF
output of the generator, it is desirable to invoke the generator biomed test band
by inserting the biomed test cable in to the generator output socket.
The use of the biomed test band is not to be used for clinical use. The biomed
test band permits modalities that would be hazardous in a clinical application.
For safety reasons, the biomed test band will time out after a short period.
Any doubt about the performance of the generator must be referred to the
nearest service centre.
