Instruction manual
desin!d using
the
VARI-TRAKER
showing indicates
LOn
or
Hln
you
have selected VOLTS.
the
instrument
provides 10MS'l
input
im-
measurement
as variable audio
tone.
Obviously
measurements
cannot
be
made
with
this
method
but
for field
usually
only
approximate
measurements
suffice
and
other
tone
more
than
outweigh
its limitations. With a brief learn-
accuracy are easily achievable.
The
VARI-
ADVANTAGES
which make it
more
Some
of
the
"n""rn:1OP<
are:
keep
your
concentration
on
the
in
the
operation
is
fast
continuity
tests
and
switch closure tests. Noise
or
in switches
show
up
immediately.
Unwanted
ripple
on
DC
voltages
is
identifiable
by
the
sound
of
the
GETTING
THE MOST
OUT
OF
VARI-TRAKER
for
many
more
VARI
TRAKER
VOLTS
mode
is used
to
measure
both
AC and
DC
For
DC
only
voltages
with
plus
connected
to
the
"+"
jack
the
tone.
Less
than
0.2
volts
or
negative voltages will be silent.
The
with
occurs from O.2V
to
""It+"""c
will have
"warble"
associated
with
the
tone
of
the
VARI-
TRAKER
The
range
audio
with
voltage
magnitude
of
the
I·TRAKER
AC
200V.
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OHMS MEASUREMENTS
Two
ranges
of
ohms
measurements
are provided.
The
LOn
tended
for
continuity
and very low resistance value
The
Hln
mode
is
intended
for resistances from
soon
be selected
for
most
measurements
in
circuit
when
Resistances
into
the
high
hundred
Kn
range will have distinctive
tones
associated
with
them.
The
sound
will
turn
off
at above
approximately
3Mn.
Using
the
LOn
range resistances as low as
o.sn
can
being
different
from
"0"
ohms. Resistances
up
to
about
distinctly
characteristic
sound.
Above
300n
the
tone
turns
off.
For
that
make
no
sound
on
the
LOn
mode
the
Hln
mode
should
GETTING THE
MOST
OUT
OF VARI· TRAKER
VARI-TRAKER
as
a
measuring
DC
volts
in
a variety
of
circuits.
in
where a ripple
may
be
of
some
concern.
If
the
ripple becomes
more
than
2%
of
the
DC
a
60
cycle warble will
appear.
is
a good indication
that
there
is
a substantial
amount
of
ripple
on
the
supply
and tests for failed filter
capacitors
or
should
be
performed.
LOCATING
INTERMITTENT
PROBLEMS
VARI-TRAKER
is
designed for
quick
response.
For
this
very useful
tool
when
looking for an
intermittent
either
For
example,
consider
a
situation
in
which
you
are
mittent
continuity
somewhere
in a game.
Set
the
be
LOn
mode
and
connect
it
between
the
two
TRAKER
will
present
a
tone
associated
with
the
points.
VARI
between
the
two
points.
Then
move wires, vibrate,
and
otherwise
attempt
to
make
the
mittent
occur.
A change
or
interruption
of
audio
tone
will alert
you
if
there
is,
in fact, an
intermittent
connection.
The
fast response
VARI-TRAKER
output
allows
you
to
detect
intermittence
that
would
not
detected
with
an
ordinary
or
analog
meter.
In
repetitive
troubleshooting
or
similar systems,
certain
produce
characteristic and distinctive
sounds
from
the
VARI-TRAKER
put,
depending
on
the
and
associated
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