Calibrating the Force EZ-C Series Electrosurgical Generator
6-30
Force EZ-C Series Service Manual
3.
Check and adjust the I factor for bipolar output.
a.
Press the footswitch pedal and check the voltmeter for a reading
equivalent to 1.50 +0/–.03 A
rms
(1.47 to 1.50 A
rms
).
b.
Stop activation. If the output current was not within the stated range,
adjust the I factor. Use the Coag Power Control knob for small
adjustments and the Cut Power Control knob for larger adjustments.
Approach the value from the low side to give consistent calibration results.
Adjust the I factor until the current is as close as possible to 1.50 A
rms
, but not
over 1.50 A
rms
.
Repeat 3a and 3b until the output current is within the stated range.
4.
Disconnect the test cables from bipolar output.
Checking the Current Sense Gain for Monopolar Output
1.
Connect the test equipment for monopolar output.
a.
Connect the test cables to the Monopolar Instrument receptacle.
b.
Verify that the 10 ohm resistor is connected to the test cables through the
current transformer.
c.
Connect a monopolar footswitch to the Monopolar Footswitch receptacle
on the rear panel.
2.
Check and adjust the I factor for the pure mode.
a.
Press the Pure button.
b.
Press the footswitch cut pedal and check the voltmeter for a reading
equivalent to 1.25 +0/–.025 A
rms
(1.225 to 1.25 A
rms
).
c.
Stop activation. If the output current was not within the stated range, use
the Cut and Coag Power Control knobs to adjust the I factor.
Approach the value from the low side. Adjust until the current is as close as
possible to 1.25 A
rms
, but not over 1.25 A
rms
.
Repeat 2b and 2c until the output current is within the stated range.
Caution
To avoid inadvertent coupling and/or shunting of RF currents around the resistor
elements, keep the resistors at least 10.2 cm (4 in.) away from any metal surface
including tabletops and other resistors. This is especially true if several resistors
are connected in series or parallel to obtain a specified value. Do not allow the
resistor bodies to touch each other.
Notice
Do not activate the generator with any load resistor higher than 10 ohms while
calibrating the current sense gain. Otherwise, product damage will result.
