ConMed sabre 180, Service Manual

Page: 58 / 72

4-8
•If HLP 10 (Incomplete Cal) appears, do NOT
power down or move A3S1 yet. Press PAD. The
CAL Menu selection which requires attention will
be flashing. Reenter by pressing PAD. Search
through all targets until those which are flashing
appear. Activate and adjust if necessary. Repeat
until no flashing targets appear.
•If HLP 11 (Non-monotonic) appears, the unit
may require service, or the calibration procedure
was improperly performed. Do NOT power
down or touch A3S1 yet. Carefully review the
procedure and proceed as with HLP 10 above.
If the unit is turned off or RESET with a HLP or
any flashing menu selection, the unit will declare
HLP 3 (NOVRAM CRC) when powered up in
RUN Mode. A complete and correct monopolar,
bipolar and ARM calibration must be completed
to clear this condition in order to return the unit
to service.
14. Connect the analyzer to the bipolar output
jacks. Set analyzer to read output CURRENT to
50 (preferred) 100 or 125 ohms.
15. Select "bP" in the Coag window. Then set the
analyzer load resistance in the Cut window.
16. Press PAD to enter Bipolar calibration.
17. There is only one target current in Bipolar.
Activate the unit using the Coag footswitch.
Check and adjust if necessary using the Cut
Power Control knob.
18. Deactivate and press PAD. The "bP" CAL
Menu selection should reappear.
19. This completes RF Output Power calibration.
Before powering down or returning to RUN
Mode, it's a good idea to step through all of the
CAL Menu selections using the Coag Power
Control knob. If any selection is flashing, re-enter
that mode and complete checking any missed
(flashing) targets.
20. If desired, the ARM Calibration mode
(Section 4.3.3 below) may be entered at this time
in lieu of returning to RUN Mode.
21. If any power calibration targets were adjust-
ed, repeat the RF Output Power Checks, Section
4.2.4.
4.3.3 Aspen Return Monitor (A.R.M.)
Calibration
This mode allows the unit to store the VARM
values measured for 10 and 150 ohm return cir-
cuit resistances. See Section 3.2.2 for A.R.M the-
ory.
Equipment:
•Return Electrode plug with unshorted leads.
•10 ohm and 150 ohm 1% 1/4W non-inductive
resistors (metal film or carbon film checked for
accuracy using an ohmmeter). Do NOT use wire-
wound resistors. An accurate Decade Resistance
Box is also suitable.
Procedure:
1. Enter CAL Mode per procedure detailed in
4.3.1 above. The foot switch is not necessary for
A.R.M calibration.
2. Using the Coag Power knob, select "Pd" (Pad)
in the Coag window.
3. Press PAD to enter A.R.M Cal Mode. Entry is
signalled by "10" (10 ohms) in the Cut window
and a 2-bar resistance display.
4. Connect the 10-ohm resistor across the pins of
the Return Electrode jack.
5. Pause a second to allow the measurement to
stabilize, then press MONITOR SET. There
should be no audible response, and the displays
should not flash.
•The unit will respond with a beep and flashing
display if it reads a VARM value outside the
expected range. Make sure that the resistance
value is 10 +/- 1 ohm and that it is making good
contact with the Return Electrode jack pins.
Repeat step 5. If the unit continues to refuse the
setting, proceed with A.R.M Troubleshooting in
Section 4.5.5.
6. Using the Cut knob, select "150" in the Cut
window. An 8-bar resistance display will also
appear.