PREG
‐
ALERT
PRO
®
INSTRUCTION
MANUAL
Rev.
2
7/1/2007
must
be
displayed.
The
sel
ected
measurement
system
will
be
used
for
all
measurements.
LOIN
:
Use
OPTION
key
to
select
the
low
range,
50
‐
140mm
or
the
high
range
90
to
180mm.
For
both
FAT
and
LOIN
measurements,
indications
to
right
of
the
vertical
marker
are
suppressed,
thus
mitigating
extraneous
information.
PREGNANCY:
Use
OPTION
key
to
select,
COW
,
PIG
,
SHEEP
or
OTHER
.
Note:
The
ruler
scale
division
markers
on
the
several
pregnancy
screens
represent
different
intervals
and
are
just
for
reference.
To
see
the
actual
distance
from
the
skin
to
particular
spike
of
interest,
use
the
DEPTH
keys
to
move
the
vertical
marker
to
it
and
read
the
distance
shown
(in
mm
or
inches).
To
help
avoid
errors,
OPTION
key
must
be
held
½
second
when
changing
from
one
screen
to
another.
COW
,
PIG
and
SHEEP
screens
display
a
heavy
horizontal
bar
under
the
graph,
which
indicates
the
proximate
distance
to
the
near
and
far
side
of
the
uterus.
Strong
spikes
within
this
area
indicate
pregnancy.
The
Preg
‐
Alert
Pro
is
a
microprocessor
‐
based
instrument,
using
low
power
A
‐
Mode
ultrasound
for
the
detection
of
pregnancy
in
mammals
and
the
measurement
of
fat
and
muscle
tissue
thickness.
It
can
be
likened
to
an
electronic
ruler
that
indicates
a
distance
computed
from
the
time
it
takes
to
receive
the
reflections
(echoes)
that
were
generated
by
the
ultrasonic
pulses
emitted
by
the
transducer
(also
called
the
“probe”).
Sound
travels
at
different
speeds
through
fat
and
muscle.
The
instrument
uses
the
appropriate
speed
for
each,
which
may
result
in
differences
when
compared
to
scanners,
most
of
which
use
the
same
speed
for
both
tissues.
The
display
is
an
analog
presentation
in
a
digital
environment,
which
is
enhanced
to
eliminate
or
mitigate
the
presentation
of
spurious
reflections
and
noise,
often
seen
on
older
CRT
displays.
There
are
three
indications
for
pregnancy,
which
are
displayed
as
spikes
on
the
screen:
1)
Pattern
recognition
of
a
group
of
reflections
from
the
fetus(es),
2)
One
spike,
a
reflection
from
the
interface
between
amniotic
fluid
and
the
far
side
of
the
intrauterine
wall.
3)
A
reflection
from
the
thickened
wall
of
the
uterus
(in
cattle).
Connect
the
cable
to
the
instrument
and
the
proper
probe
to
the
cable.
Note:
That
Standard
probe
having
a
blue
body
should
be
used
for
all
animals
except
for
very
early
pregnancy
testing
on
cows,
mares,
and
other
large
mammals.
The
optional
Deep
probe—larger
and
having
a
black
body—should
be
used
for
very
early
pregnancy
testing
in
cows,
mares
and
other
large
mammals.
The
Standard
probe
can
be
used
with
most
large
mammals
after
90
days
gestation.
The
Standard
probe
can
be
used
with
large
mammals
at
the
early
times,
but
getting
good
indications
is
problematic
and
in
any
case
more
difficult.
©2007
Renco
Corporation
Page
3
of
13
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