Calibrating the Generator
Setup, T
ests, and Adjustments
Force FX-8C Service Manual
5-29
Step 4 – Check and Adjust the REM Oscillator Frequency and
Impedance
Equipment required
• Oscilloscope
• REM plug (modified) or two small (< 61 cm [24 in.]) test cables
• Resistor substitution box.
A.
Verify
• The Bipolar display shows calibration step number 4.
• The Coag display shows the letters OP (open circuit).
B.
Calibrate the REM oscillator frequency.
(1)
Connect an oscilloscope across the Patient Return Electrode
receptacle pins.
(2)
Remove the five screws that secure the cover to the chassis and lift
the cover off the chassis.
(3)
On the Power Supply/RF board, adjust potentiometer R96 for
maximum amplitude of the voltage waveform across the Patient
Return Electrode receptacle pins. The frequency of this waveform
should be approximately 82 kHz.
(4)
Remove the oscilloscope.
(5)
Install the cover by positioning it above the chassis and sliding it
down. Install the five screws that secure the cover to the chassis.
C.
Open circuit the REM connection. Press the Coag up arrow (
∆
) button
once. Verify that 10 appears in the Coag display.
D.
Connect the resistor substitution box across the two terminals in the
Patient Return Electrode receptacle using a modified REM plug or two
test cables.
E.
Set the resistor substitution box to 10 ohms. Press the Coag up arrow
(
∆
) button once. Verify that 70 appears in the Coag display.
F.
Set the resistor substitution box to 70 ohms. Press the Coag up arrow
(
∆
) button once. Verify that 135 appears in the Coag display.
G.
Set the resistor substitution box to 135 ohms.
H.
To save the REM calibration values and go to the next calibration step,
press the Bipolar up arrow (
∆
) button.
Next, check the current sense gain factor as described in Step 5 – Check and
Adjust the Current Sense Gain Factor.
Warning
Electric Shock Hazard
Do not touch any exposed wiring or conductive surfaces
while the generator is disassembled and energized. Never wear a grounding
strap when working on an energized generator.
Summary of Contents for Force FX-8C
Page 1: ...Service Manual Force FX 8C Electrosurgical Generator with Instant Response Technology...
Page 30: ...Notes 2 12 Force FX 8C Service Manual...
Page 56: ...Notes 3 26 Force FX 8C Service Manual...
Page 58: ...Block Diagram 4 2 Force FX 8C Service Manual Block Diagram...
Page 84: ...Notes 4 28 Force FX 8C Service Manual...
Page 156: ...Interconnect Diagram 7 2 Force FX 8C Service Manual Interconnect Diagram...
