Service manual
- alsa apparecchi medicali s.r.l. -
Pag. 13
The models 350 and 200 are without the bipolar cut section. Perform the test as follows:
1)Connect the bipolar output as above specified (point 1), but using a load of 100 V.
2)Set function “bipolar MP” with code “A8”. Activating the unit the monopolar coag. display should show a
value of 165 (± 2 digits) and the output current should be 700 mA (±10%).
3)Activate again the unit setting code “48”. The monopolar coag. display should show a value of 70 (± 2
digits) and the output current should be 300 mA (±10%). The wave forms relative to the two settings are
shown below:
(I out) (I out)
device setting: ”A8” device setting: ”48”
CALIBRATION OF THE MAXIMUM BIPOLAR 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
04
-
This calibration is identical to the correspondent one about monopolar functions, and so follow the same
instructions.
The only difference is:
1)The bipolar output must be connected to an antinductive load of 50 ohm
2)The procedure starts from function “bipolar PC” for models 400 and 250 and from function “bipolar MP” for
models 350 and 200
3)The output current of coagulation MPA is equal to that of coagulation MP
4)For values of different functions see the table below
bipolar function I out
(A)
Pure Cut (PC) 1.0
Blend (BC) 1.0
Micro Precise (MP) 0.9
Micro Prec. Auto (MPA)
0.9
Standard Macro (SM) 1.0
Table 2 – Values detected on load of 50 Ω
Once performed all calibrations switch off the unit and switch it on again (so you save all
calibrations and settings)
RE-ENABLING OF THE STANDARD EPROM
Once the maximum bipolar output currents have been calibrated and the unit is turned off, replace the
“calibration and control EPROM” with the standard EPROM, then go on as follows:
1)Turn the device on and wait for the end of the self-test phase (the unit is in standby mode and it is possible
to modify all settings but it is impossible to activate it. The displays may show some strange characters
without meaning.
2)To reset the unit and eliminate the problem simply press one of the two up–down power push buttons of
the section showing the abnormal condition. IF NECESSARY REPEAT THE SAME RESET FOR EACH
AVAILABLE FUNCTION.
CONTROL OF THE NEUTRAL PLATE ALARM CIRCUIT ( REM TYPE)
Perform the control as follows:
1)Connect the probe of the oscilloscope to TP “T” on the Double Handle & Neutral Plate Control Board (Alsa
code 801308).
PC function setting: " "A8
0
PC function setting: " "48
0