Calibrating the Force EZ-C Series Electrosurgical Generator
Setup, T
e
st
s, and Adjustment
s
Force EZ-C Series Service Manual
6-31
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 1.0 +0/–.02 A
rms
(0.98 to 1.0 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 1.0 A
rms
, but not over 1.0 A
rms
.
Repeat 3b and 3c until the output current is within the stated range.
4.
Disconnect the test cables and the 10 ohm resistor from monopolar output.
5.
To save the current sense gain calibration and go to calibration step 6, turn the
Bipolar Power Control knob clockwise.
Next, check the voltage sense gain factor as described in
Calibration
Step 6 – Check and adjust the voltage sense gain
.
Calibration Step 6 – Check and Adjust the Voltage Sense
Gain
Equipment
•
Two short test cables (less than 24 inches long) with banana plugs
•
Current transformer (such as the Pearson Model 411 or equivalent)
•
True RMS voltmeter (such as the Fluke 8920 or equivalent)
•
750, 3000, and 2000 ohm noninductive power resistors (such as the Dale NH-
250)
•
Bipolar footswitch and monopolar footswitch
Checking the Voltage Sense Gain for Bipolar Output
1.
Verify that the Bipolar display shows calibration step number 6.
The Cut and Coag displays show the V (output voltage) factor. If it is four or
more digits, the most significant digits are in the Cut display.
2.
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.
Notice
Do not activate the generator with any load resistor lower than 750 ohms while
calibrating the voltage sense gain for bipolar output. Otherwise, product damage
will result.
