Service manual

- alsa apparecchi medicali s.r.l. -
Pag. 12
To start this test perform the selection as detailed on the table below
Setting Memory Monopolar Cut Display Monopolar Coag. Display
M II
03
0303
03

04
0404
04




The maximum output voltage peak is one of the factors that affect the HF leakage current. The signal
proportional to this voltage peak is VOUTPK.
1)Select M_I
2)Set “monopolar PC”, code “
A0
”. Activating the device the monopolar cut display should show a value of
134 (± 2 digits). If necessary adjust the R9 trimmer on the R.F. Main Board . Check again the VOUTPK value
with setting code “
50
” (the corresponding value should be 060).
CALIBRATION OF THE MAXIMUM MONOPOLAR OUTPUT CURRENT
(
FUNCTION PER FUNCTION
)
To start this test perform the selection as detailed on the table below
Setting Memory Monopolar Cut Display Monopolar Coag. Display
M II
07
0707
07


-
This calibration is needed to fix the maximum output current for each function. The value established during
the procedure is automatically stored in the EEPROM containing the values of calibration (this EEPROM is
on the Panel board.
Perform this calibration as follows:
1)Connect the monopolar output to an antinductive load of 100 Ω
2)Select M_I
3)Step by step select all the available functions starting from “monopolar PC” and, for each function, activate
the unit checking the output current (should be as detailed on the following table 1 for each function).
If the value is different, activating the unit (pressing the pedal switch
), adjust the output current by the up-
down push buttons used on the front panel to set the current for each function.
This calibration is possible ONLY pushing the pedal switch corresponding to the function
selected otherwise it is impossible.
mono
p
olar function Iout
(
A
)
Pure Cut (PC) 1.4
Blend I (BC I) 1.3
Blend II (BC II) 1.3
Blend III (BC III) 1.2
monopolar function Iout (A)
PinPoint Contact Soft (PCS) 1.3
Fulguration (F) 1.2
Spray (SPR) 1.2
Auto (A) 1.3
Table 1 – Values detected on load of 100
Ω
CONTROL OF BIPOLAR OUTPUT POWER
To start this test perform the selection as detailed on the table below
Setting Memory Monopolar Cut Display Monopolar Coag. Display
M II
02
0202
02

06
0606
06


This setting is used to check the PWRFB parameter.
1)Connect the bipolar output to an antinductive load of 400 Ω
2)Select M_I
3)Set function “bipolar BC” and code “
E6
”. Activating the unit, the monopolar coag. display should show a
value of 254 (± 2 digits). If necessary, calibrate the R45 pot on the
Microcontroller board
.
4)Activate again the unit setting code “
89
”, a value of 150 (± 2 digits ) should appear on the display.
5)Activate again the unit with the same setting and check the level of the output current .
It should be: 500 mA (±10%) when the display shows the value 254 and 300 mA (±10%) when the display
shows the value 150. The waveforms relative to the two settings are shown below:
(I out) (I out)
e
0
PC
f
unct
i
on sett
i
ng:
"
"
E
6
0
PC
f
unct
i
on sett
i
ng:
"
"
89