Söring Arco-3000 - Adjustment of Cut-Module

25/08/2004 © Söring Service-Manual Arco- and RF-units
1
not valid for A-3000/ -2000
2
not valid for Arco-2000
-67-
3
not valid for MBC600
4
not valid for Arco-1000
Turn potentiometer P3 on synchro-board and P3 on coagulator board fully
counterclockwise. Select Spray or Argon step 1 and turn P3 (synchro-board) clockwise
until LED D10 on coagulator board extinguishes. Turn P3 (synchro-board) one more turn.
With this procedure the handpiece must not
be connected to the power meter.
Remark: Output power and ignition pulse energy (see there) might be adjusted first
without synchro-pulses.
Basic adjustment of output power (without synchro-pulses)
- Connect RF-meter (handpiece, patient electrode, casing and ground), load 200
Ω ,
select power step Spray 5 or Argon 5 and 120W. Start equipment and adjust
potentiometer P1 for an output power of 120W at 200
Ω (without monitor signal).
Adjustment of ignition pulse energy
- Disconnect handpiece from RF-meter. Select power step Spray 1 or Argon 1 resp.
20W. Start equipment and adjust potentiometer P2 so that LED D29 just lights up.
Then turn P2 one full turn counter-clockwise
Frequency check
Measurement by frequency measurement-device between source and gate of transistor
T8. The following values have to be measured:
-Spray, 1: 20W 14
± 0,5kHz
-Spray, 5: 120W 70
± 5kHz
These frequencies are adjusted on the synchro-board: P2 (70 kHz) and P1 (14
kHz).
For types without a synchro-board the tolerances are larger because no adjustment is
possible. The tolerances are 16
± 2kHz, 80 ± 8kHz.
Adjustment of arc-detector sensitivity (Idle mode)
- Select power step Spray 1 or Argon 1, 20W. Operate handpiece without load. Turn
potentiometer P3 fully clockwise. Wit running equipment turn P3 counterclocwise
until LED D10 extinguishes. Turn P3 three full turns more counterclockwise.
- Test: With activation of Coag.-handpiece- or foot switch LED D10 lights up shortly
and must extinguish immediately
. This must also be the case when synchro-signals
are applied to the synchro-board. If in this case D10 periodically blinks, P3 on the
synchro-board must be turned clockwise until D10 extinguishes. Then turn this
potentiometer one more turn clockwise.
Regarding position of potentiometers and LED´s see "Position of LED´s and Poten-
tiometers I + II.
12.5.3. Adjustment of cut-module
Necessary equipment
- RF-power meter (load resistors 100, 200 & 300
Ω ; measuring range 350w)
- RF-Handpiece with switches
- Bipolar connecting cable
- Foot switch
The following adjustments have to be carried out:
- Resonance frequencies monopolar- and bipolar mode
- Adjustment offset voltage of power measuring amplifier
- Check of arc regulation