Force
FXTM-C
Service
Manual
Calibrating
the
Force
FX-C
Generator
Checking
the
Voltage
Sense
Gain
for
Bipolar
Output
Notice
Do not activate the generator with any load resistor lower than 1000 ohms while
calibrating the voltage sense gain for bipolar output. Otherwise, product damage
will result.
1.
Connect
the
test
equipment
for
bipolar
output.
a.
Connect
the
nvo
test
cables
to
the
Bipolar
Instrument
receptacle.
b.
Pass
one
test
cable
through
the
current
transformer
and
connect
the
current
tran.sformer
to
the
voltmeter.
c.
Connect
the
1000
ohm
resistor
across
the
output
jacks
at
the
end
of
the
test
cables.
d.
Connect
the
bipolar
footswitch
to
the
Bipolar
Foots"ritch
receptacle
on
the
rear
panel.
2.
Check
and
adjust
the
V
factor
for
bipolar
output.
a.
Press
the
Standard
button.
b.
Press
the
bipolar
footswitch
pedal
and
check
the
voltmeter
for a
reading
equivalent
to
98 ± 14
rnA
rms.
c.
Stop
activation.
If
the
output
current
reading
was
too
high,
raise
the
V factor
by
pressing
the
Coag
up
arrow
(
~
)
button.
If
the
reading
was
too
low,
lower
the
V factor
by
pressing
the
Coag
down
arrow
(
'V
)
button.
Repeat
this
step
until
the
voltmeter
reading
is
within
the
stated
range.
The
V factor
for
the
Precise
and
Macro
modes
adjusts
automatically.
3.
Disconnect
the
test
cables
and
remove
the
1000
ohm
resistor.
Checking
the
Voltage
Sense
Gain
for
Monopolar
Output
Notice
Do not activate the generator with any load resistor lower than 3000 ohms while
calibrating the voltage sense gain for the Low and Pure cut modes. Do not
activate the generator with any
load resistor lower than 2000 ohms while
calibrating the voltage sense gain for the Blend mode. Otherwise. product
damage will result.
1.
Connect
the
test
equipment
for
monopolar
output.
a.
Connect
one
test
cable
to
the
left jack
in
the
Monopolar
l/CEM
Instrument
receptacle.
Pass
the
test
cable
through
the
current
transformer
and
connect
the
current
transformer
to
the
voltmeter.
h.
Use
a
test
cable
to
short
the
hvo
pillS
on
the
Patient
Return
Electrode
receptacle.
c.
Connect
the
second
test
cable
from
the
voltmeter
to
both
pins
of
the
Patient
Return
Electrode
receptacle.
d.
Connect
the
3000
ohm
resistor
to
the
test
cables
through
the
current
transformer
for
monopolar
output.
5-33
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