ConMed sabre 180, Service Manual

Page: 54 / 72

4-4
4.2.5 RF Leakage
Equipment:
•150 mA RF Ammeter with 1/8 A fuse.
•200 ohm 10W Noninductive Resistor.
•Patient Plate Adapter Plug.
•Bovie #12 Adapter Plug
•2 - Test leads, 1m max. length.
•Test lead, 10 cm max. length.
•Wooden table approximately 1m from floor.
NOTE: RF leakage is primarily the result of stray
capacitance to earth from the activated terminal
opposite the one being measured. If excessive
leakage is observed, first ensure that no unneces-
sary connections, leads or hand capacitance are
elevating stray capacitance. If an electrosurgical
analyzer is used, ensure that it is connected only
to the measured terminal and earth.
Procedure:
1. Ensure that the unit is fully assembled and all
fasteners are tight.
2. Place the meter and resistors on the table so
that they are at least 0.5m away from the unit
under test and any other conductive surface.
3. Set the unit for full power in Monopolar Coag
and Bipolar Coag. Connect the 200 ohm nonin-
ductive resistor in series with fused RF ammeter,
and a common earth ground (the footswitch con-
nector shell will suffice). One at a time, connect
this series combination to each RF output termi-
nal indicated in Table 4.2, and active the unit
using the corresponding command. Confirm that
no meter readings exceed the specified maximum.
Hand control coag activation is accomplished by
connecting a jumper between the center jack and
the red jack of the hand controlled active connec-
tor.
>WARNING<
HAND CONTROL ACTIVATIONS
SHOULD BE KEYED USING 3'' OR LESS
WELL INSULATED JUMPER(S). USE OF
AN INSULATING ROD TO INSERT THE
JUMPER IS ADVISED TO PREVENT RF
BURNS.
MEASURED OUTPUT ACTIVATION MAXIMUM
TERMINAL COMMAND LEAKAGE (mA)
RETURN ELECTRODE MONOPOLAR FOOT COAG 97
RETURN ELECTRODE HAND CONTROL COAG 97
FOOT ACTIVE MONOPOLAR FOOT COAG 97
BIPOLAR LEFT BIPOLAR FOOT COAG 50
BIPOLAR RIGHT BIPOLAR FOOT COAG 50
Table 4.2 RF Leakage to Earth Tests