Valleylab Force FX-C - Page 108

Calibrating the Force FX-C Generator
5-30
Slep 5 - Check and Adjusllhe Current Sense Gain
Equipment required:
• Two short test cables (less than 61 cm [24 in.] long) with banana plugs
• Current transformer (such as the Pearson Model 411 or equivalent)
• True RMS voltmeter (such as the Fluke 8920 or equivalent)
• 10 ohm noninductive power resistor (such as the Dale NH-250)
•
Bipolar footswitch and monopolar footswitch.
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Verify that the Bipolar display shows calibration step number 5. The Cut
and Coag displays show the I (current) factor. If it is four or more digits,
the most significant digits appear in the Cut display.
Checking the Current Sense Gain for Bipolar Output
1. Connect the test equipment for bipolar output.
a. Connect the two test cables to the Bipolar Instrument receptacle.
b. Pass one test cable through the current transformer and connect the
current transformer to the voltmeter.
c. Connect the 10 ohm resistor across the output jacks at the end of
the test cables.
d. Connect the bipolar footsvvitch to the Bipolar Footswitch receptacle
on the rear panel.
Force f)(fM-C Service Manual