ConMed sabre 180, Service Manual

Page: 19 / 72

2-3
return alarm and that the bar graph remains dark.
Press MONITOR SET and verify that RETURN
MONITOR remains lit and a "two-beep" alarm
sounds.
17. Replace the single foil electrode with an
A.R.M. compatible dual-foil monitoring elec-
trode. While the electrode remains open to the
air, press MONITOR SET. Verify that RETURN
MONITOR remains lit, a two-beep alarm sounds
and that all RESISTANCE bar segments are
flashing.
18. Gradually apply the dual foil electrode to
well-perfused, relatively hair-free skin surface,
such as the medial forearm or posterior calf. As
electrode contact area increases, verify that the
RESISTANCE bar graph segments darken from
right to left.
19. With the dual foil electrode fully applied,
verify that a portion of the RESISTANCE bar
graph remains flashing. Press MONITOR SET,
and verify that the RETURN MONITOR goes
out and that the RESISTANCE bar graph stops
flashing.
20. Gradually peel the dual foil electrode until a
RETURN alarm occurs. Verify that over 2/3rd
of the electrode remains in contact with the skin
at the onset of the alarm. Continue peeling the
electrode slowly, verifying the RESISTANCE bar
graph progressively illuminates.
2.3.2 Preliminary Performance Testing
After the unit passes the Preliminary Functional
Tests of Paragraph 2.3.1, preliminary performance
testing may be conducted. Such testing is best
carried out by use of an electrosurgical generator
tester, as described in Section 4 of the Sabre 180
Service Manual. If such a tester is available, note
that the power display will most accurately indi-
cate the power available to a 500 ohm
(Monopolar) and the 50 ohm (Bipolar) nonin-
ductive resistor. However, the indicated power to
any such load in the 300-500 ohm (40-80
Bipolar) range should be within 15% of that indi-
cated on the digital display.
If no tester is convenient, the availability of
therapeutic current may be ascertained subjective-
ly by attempting to cut and coagulate on surro-
gate tissue such as a piece of meat or fresh fruit, a
wet bar of soap or a sponge moistened in saline.
Although not recommended, a last resort verifica-
tion of available power can be made by drawing
arcs between active and dispersive electrodes or
between the tips of a bipolar forceps. Such a test
will not damage the unit if not carried out for
more than a few seconds, however one should
expect that the electrodes may be damaged due to
the extreme temperatures generated by the arc.