Calibration (Pad) - ConMed Sabre 2400 Operators & Service Manual

R
12. Activate the unit in Bipolar mode and use the
Bipolar Power Increase/Decrease keys to match
the target value. Deactivate the unit when the
best match is reached.
13. Press "SEL " and return to the menu. When
the point has been calibrated satisfactorily, press-
ing the "SEL " key will store the updated values
and restore the menu. The display will show a
steady "bP" if the calibration has been completed
properly otherwise it will be flashing or show a
HLP code.
14. Check all modes (C-C, bP , and Pad) to deter-
mine none of them are flashing. If any are, cali-
brate that mode.
15. Turn the unit off, then on to confirm the unit
powers up normally and is ready for use. Replace
the top cover screws.
4.6.4 A.R.M. Calibration (Pad)
This mode calibrates the Aspen Return Monitor
(A.R.M.) circuitry. The only equipment required
to complete A.R.M. Calibration are 10 and 150
ohm resistances accurate to 5% or better. Power
ratings are unimportant, but wirewound resistors
should not be used. A means to connect the resis-
tance between both pins of either of the Return
Electrode jacks is also required. One can make
a set of calibration resistors by cutting dual foil
return electrode plugs from the pad and soldering
the appropriate resistor to the plug.
1. Remove the two screws at the rear of the unit
to open the top cover.
2. Connect the power plug to a source of AC
power of the same frequency and voltage speci-
fied on the nameplate.
3. Press A2SW1 (marked CAL) on the micro/
control PWB, while turning on the unit's circuit
breaker. Successful entry to CAL mode is signi-
fied by all segments of the display lighting.
4-12
4. Press "SEL ". The unit will then momentarily
display "CAL " and proceed to display "C-C" in
the Cut Power Window. Press the Cut Power
Increase/Decrease Keys to display "Pad" in the
window.
5. Press "SEL " to move into the actual calibra-
tion. The Coag Power Window will display the
target value ohms to be connected to the Return
Electrode jack. The Resistance Indicator will be
lit with a corresponding number of bars. A flash-
ing Resistance Indicator denotes an uncalibrated
point.
6. Connect the selected resistance to the Return
Electrode jack. Wait a second or two, then press
the Monitor Set key to store the calibration value.
7. Use the Coag Power Increase or Decrease keys
to select the other calibration point, connect the
new indicated resistance, pause and enter it as
before.
NOTE: If an error tone is sounded when the
Monitor Set key is pressed, then the calibra-
tion point is out of range, and both points will
be declared uncalibrated. Check to ensure that
the resistance has the value as displayed in the
Coag window and that it is well connected to the
Return Electrode. Then repeat calibration of both
values. Calibration was successful if the Resistance
Indicator is lit steadily for both points.
8. Press the "SEL " Key to restore the menu and
save the new values.
9. Turn the unit off, then on to confirm the unit
powers up normally and is ready for use.
10. Replace the top cover screws.