BIOMED SERVICE MANUAL Electrosurgical Generator G400 Workstation
Model 777000
Gyrus ACMI G400 Workstation
BIOMED SERVICE MANUAL
Page 7 of 57
Part Number: 177079-AA
Diagnostic Test Equipment
The list of recommended test equipment to perform the routine checks of the
generator is as follows:
1. Approved Electro-surgical analyser*
++
2. Approved instrument (IEC60601) to perform equipment safety tests
3. Biomed test cable PN: BTK-G400.
Where applicable the equipment must have a recognised calibration certificate.
*The G400 has RF output modalities that are very difficult for most electro-
surgical analysers to measure. The Gyrus ACMI’s technical authority has
stated that testing the continuous wave and blended output modalities of the
generator are sufficient to confirm full equipment functionality.
++ Gyrus ACMI recommend the use of a Fluke 8920A True RMS RF voltmeter
or BC Biomedical ESU 2050, non-inductive load resistors and Pearson Current
Transformer model 411 to measure the current output of the generator and
calculate the delivered power. The 411 current transformer has a transfer
function of 100mV per Amp. The calculated delivered power may be derived
from:
Pm = (10*I
V
)
2
* R
L
Where :
Pm is the measured power in Watts
I
V
is the voltage measurement on the Fluke 8920A representing true RMS
current (volts)
R
L
is the non-inductive load resistor in ohms
Example
100W = (10 * 81.7x10
-3
V)
2
* 150
Working Practises
FUSES
There are two mains fuses fitted to the generator; care must be taken to ensure
any replacements fitted are approved types directly equivalent to the ones
supplied by Gyrus ACMI. The fuse details are on the rear panel label.
ESD PRECAUATIONS
The generator contains electrostatic discharge sensitive components. Care
should be taken to minimise the risk of electrostatic discharge.
