Covidien Force FX - Checking and Adjusting the Voltage Sense Gain

Calibrating the Generator
Setup, Tests, and Adjustment
Force FX Electrosurgical Generator C Service Manual 5-33
2. Check and adjust the I factor for the Low and Pure cut modes.
a. Press the Pure button.
b. Press the footswitch cut pedal and check the voltmeter for a reading equivalent to
1250 ± 8 mA
rms
.
c. Stop activation. Do one of the following:
• If the output current reading was too high, raise the I factor by pressing the
Coag up (D) arrow button.
• If the reading was too low, lower the I factor by pressing the Coag down
arrow () button.
Repeat this step until the voltmeter reading is within the stated range. The I factor for
the Low cut mode is adjusted automatically.
3. Check and adjust the I factor for the Blend mode.
a. Press the Blend button.
b. Press the footswitch cut pedal and check the voltmeter for a reading equivalent to
1000 ± 8 mA
rms
.
c. Stop activation. Do one of the following:
• If the output current reading was too high, raise the I factor by pressing the
Coag up arrow () button.
• If the reading was too low, lower the I factor by pressing the Coag down
arrow () button.
Repeat this step until the voltmeter reading is within the stated range.
4. Disconnect the test cables and remove the 10 Ω resistor.
5. To save the current sense gain calibration and go to the next calibration step, press
the Bipolar up arrow () button.
Next, check the voltage sense gain factor as described in Check and Adjust the Voltage
Sense Gain.
Checking and Adjusting the Voltage Sense Gain
Equipment required
• Two short test cables (less than 24" [61 cm] long) with banana plugs
• Current transformer (such as the Pearson Model 411 or equivalent)
• True RMS voltmeter (such as the Fluke 8920 or equivalent)
• 1000, 2000, and 3000 Ω noninductive power resistors (such as the Dale NH-250)
• Bipolar footswitch and monopolar footswitch