Valleylab Force FX-8C, Service Manual

Page: 103 / 218

Periodic Safety Check
Setup, T
ests, and Adjustments
Force FX-8C Service Manual 5-19
Checking the Monopolar Output
Step 1 – Check the Output for the Cut Modes
A.
Verify that the generator successfully completes the self-test as
described in Testing the Generator in this section.
B.
Connect the test equipment for monopolar output.
(1)
Connect one test cable to the left jack in the Monopolar 1/CEM
Instrument receptacle. Pass the test cable through the current
transformer and connect the current transformer to the
voltmeter.
(2)
Use a test cable to short the two pins on the Patient Return
Electrode receptacle.
(3)
Connect the second test cable from the voltmeter to both pins of
the Patient Return Electrode receptacle.
(4)
Connect the 300 ohm resistor across the output jacks at the end
of the test cables.
(5)
Connect the monopolar footswitch to the Monopolar 1
Footswitch receptacle on the rear panel of the generator.
C.
Press the Pure button.
D.
Press the Cut up (
∆
) or down (
∇
) arrow buttons to set the cut power to
80 watts.
E.
Test the monopolar cut output.
(1)
Press the footswitch cut pedal and, while activating the
generator, note the output on the voltmeter.
(2)
Release the footswitch pedal.
(3)
Based on the voltmeter setting and the current transformer you
are using, calculate and record the output current.
F.
Press the Low cut button and repeat step 1.E.
G.
Press the Blend button and repeat step 1.E.
H.
Verify that the generator output for each mode is 516 ± 37 mA rms.
If the output is outside the specified range, calibrate the monopolar
output as described in calibration steps 5, 6, 7, and 8. Then repeat this
procedure. If the output for one or more cut modes remains outside the
specified range, call the Valleylab Service Center.