Covidien Force FX, Service Manual

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Calibrating the Generator
5-36
Force FX Electrosurgical Generator C Service Manual
Repeat this step until the voltmeter reading is within the stated range.
5.
Disconnect the test cables and remove the 2000 Ω resistor.
6.
To save the voltage sense gain calibration and go to the next calibration step, press
the Bipolar up arrow (

) button.
Next, go to
Check and Adjust the Reactance Gain.
Checking and Adjusting the Reactance 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)
• 30 and 200 Ω noninductive power resistors (such as the Dale NH-250)
• Bipolar footswitch and monopolar footswitch
Verify that the Bipolar display shows calibration step C7. The Cut and Coag displays show
the Z (reactance) factor. If it is four or more digits, the most significant digits are shown in
the Cut display.
Checking the Reactance Gain for Bipolar Output
1.
Connect the test equipment for bipolar output.
a.
Connect the two test cables to the Bipolar receptacle.
b.
Pass one test cable through the current transformer and connect the current
transformer to the voltmeter.
c.
Connect the 30 Ω resistor across the output jacks at the end of the test cables.
d.
Connect the bipolar footswitch to the Bipolar Footswitch receptacle.
2.
Adjust the Z factor for bipolar output.
a.
Press the Standard button.
b.
Press the bipolar footswitch pedal and check the voltmeter for a reading
equivalent to 1250 ± 12 mA
rms
.
c.
Stop activation. Do one of the following:
• If the output current reading was too high, lower the Z factor.
• If the reading was too low, raise the Z factor.
To change the Z factor by ones, press the Coag up (

) or down (

) arrow buttons.
Notice
Do not adjust the reactance gain while the generator is activated.