Service manual

- alsa apparecchi medicali s.r.l. -
Pag. 11
To start the test perform the selection detailed on the table below
Setting Memory Monopolar Cut Display Monopolar Coag. Display
M II
00 03
Before checking the real output power of the unit, check the setting of the MODMEN parameter as follows:.
1)Connect the monopolar output to a non-inductive load of 400 V.
2)Select M_I.
3)Set function “monopolar PC” and activate the device, the monopolar cut display should show a value of
116 (± 1 digit). If necessary, with the device still activated, calibrate the R34 pot on the Microcontroller board.
CONTROL OF THE SIGNAL PROPORTIONAL TO THE MONOPOLAR OUTPUT POWER
To do this tests perform the selection detailed in the following table:
Setting Memory Monopolar Cut Display Monopolar Coag. Display
M II
00 02
Selecting M_I and activating the device the monopolar cut display should show a value of the signal
proportional to the output power.
1)Select the function “monopolar PC”, code “AD” and activate the device. The display should show a value of
210 (± 3 digits). If necessary, activating the unit, adjust the R34 pot of the Power Reader board (2)
2)Select the same function but with code “56” and activate the device. The value on the display should be
102 (± 3 digits).
CONTROL OF THE SIGNAL PROPORTIONAL TO THE MONOPOLAR AND BIPOLAR OUTPUT CURRENT
To start this test perform the selection detailed in the table below:
Setting Memory Monopolar Cut Display Monopolar Coag. Display
M II
02 01
Selecting M_I and activating the device the monopolar cut display should show a value of the signal
proportional to the output current (monopolar and bipolar).
1)Select M_I
2)Set function “monopolar PC” h code “AD” and activate the device. The display should show a value of 122
(± 3 digits). If necessary, activating the unit , adjust the R81 pot of the Power Reader board (2)
2)Select the same function but with code “56” and activate the device. The value on the display should be 84
(± 3 digits).
CONTROL OF MONOPOLAR OUTPUT POWER
1)Connect the monopolar output to a load of 400 V.
2)Set function “monopolar PC” , code “AD” and activate the device. The output current should be equal to
800 mA (± 10%). Setting the power level of “monopolar PC” at “56”, the output current should be equal to
400 mA (± 10%). Check even the wave form of the output current, should be sinusoidal, as shown below:
(I out) (I out)
CALIBRATION OF THE LIMITATION OF THE MAXIMUM OUTPUT CURRENT (ONLY MODELS 400 AND 250)
1)Connect the bipolar output to a load of 50 V.
2)Set function “bipolar PC” and the maximum power that may be selected. Activate the device and calibrate
the R4 trimmer on the R.F. Main Board adjusting the output current to 1 A (± 10%).
CALIBRATION OF THE MAXIMUM OUTPUT PEAK VOLTAGE
0
PC function setting:"AD"
0
PC function setting: " "
56