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Valleylab Force FX-C - Check and Adjust the ECON Factor

Valleylab Force FX-C
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Calibrating
the
Force
FX-C
Generator
5-36
c.
Stop activation.
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
( V )
arrow
buttons.
To
change
it
by
hundreds,
press
the
Cut
up
(
~
)
or
down
( V )
arrow
buttons.
Repeat
this
step
until
the
voltmeter
reading
is
within
the
stated
range.
The
Z factor for the Low
cut
mode
is
adjusted
automatically.
3.
Adjust
the
Z 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
1000
±
10
rnA
rms.
c.
Stop
activation.
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
( V )
arrow
buttons.
To
change
it
by
hundreds,
press
the
Cut
up
(
~
)
or
down
( V )
arrow
buttons.
Repeat
this
step
until
the
voltmeter
reading
is
within
the
stated
range.
4. Disconnect
the
test
cables
and
remove
200
ohm
resistor.
5.
To
save
the
reactance
gain
calibration
and
go
to
the
next
calibration
step,
press
the
Bipolar
up
arrow
(~)
button.
Next,
go
to Step 8 - Check and
Adjust
the
ECON
Factor.
Step
8 -
Check
and
Adjust
the
ECON
Factor
Equipment
required:
• Two
short
test cables (less
than
61
cm
[24
in.] long)
with
banana
plugs
•
3D,
100,
and
SOD
ohm
noninductive
power
resistors (such as
the
Dale
NH-2S0)
•
Bipolar footswitch
and
monopolar
footswitch
•
Current
transformer (such
as
the
Pearson
Model
411
or
equivalent)
• True RMS
voltmeter
(such
as
the
Fluke 8920
or
equivalent).
Verify
that
the
Bipolar
display
shows
calibration
step
8.
Checking
Bipolar
Output
1.
Connect
the
test
equipment
for
bipolar
output.
a.
Connect
the
two
test cables to
the
Bipolar
Instrument
receptacle.
b.
Connect
the
30
ohm
resistor across
the
output
jacks
at
the
end
of
the
test cables.
c.
Connect
the
bipolar
footswitch to
the
Bipolar Footswitch
receptade.
2.
Press
the
Low
(precise)
button.
Force
F)(TM-C
Service
Manual

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