21
Phone:(910)
392
‐
2490
Fax:
(910)
392
‐
2123
416
Landmark
Drive
Wilmington,
NC
28412
www.easterninstruments.com
Vibratory
Scaling
NOTE:
These
parameters
are
typically
set
up
at
factory
and
should
not
need
adjustment.
There
is
a
minimum
acceleration
required
for
product
in
the
vibratory
tray
to
begin
moving.
There
is
also,
a
maximum
acceleration
limit
specified
by
the
manufacturer
that
if
exceeded
can
cause
poor
short
term
flow.
The
scaling
of
the
acceleration
of
the
Vibratory
Conveyor
allows
the
limits
of
the
system
to
be
set.
Normally,
a
0%
control
out
signal
in
a
4
‐
20
mA
system
is
4
mA,
while
100%
control
out
is
20
mA.
If
the
minimum
acceleration
required
to
move
product
in
the
tray
is
not
achieved
until
20%
control
out
(7.2
mA),
for
example,
then
a
control
out
signal
between
0%
and
20%
will
not
affect
the
flow
signal.
This
means
that
the
flow
rate
will
be
zero
until
the
control
out
is
greater
than
20%
which
complicates
the
ability
of
the
controller
to
maintain
the
desired
flow
rate.
Although
vibratory
scaling
is
typically
performed
at
the
factory,
if
scaling
in
the
field
is
re
‐
quired,
please
follow
the
below
steps:
1.
From
the
Main
TOP
Menu,
press
the
ADV
Advanced
Control
Button
and
then
press
the
Control
Modifications
Button.
Finally,
press
the
Vibratory
Scaling
Button
so
that
you
are
on
the
page
to
the
right.
2.
From
the
ADV.VIB.SCALE
Page,
you
can
set
both
the
Vibra
‐
tory
Minimum
Control
Out
as
well
as
the
Vibratory
Maximum
Control
Out.
Determining
the
Vibratory
Minimum
Control
Out
The
Vibratory
Minimum
Control
Out
is
determined
by
when
product
begins
to
move
on
the
Vibratory
Conveyor.
Once
product
begins
to
move
on
the
conveyor
(only
slightly)
record
the
output
(as
a
percentage
of
full
scale)
by
pressing
the
Vibratory
Minimum
CO
Button
and
enter
‐
ing
it
via
the
numeric
keypad.
Determining
the
Vibratory
Maximum
Control
Out
The
Vibratory
Maximum
Control
Out
is
determined
by
the
amount
of
product
that
is
able
to
move
through
the
system.
Set
the
maximum
Control
Out
to
100%
and
see
if
full
scale
is
ex
‐
ceeded
as
product
runs
through
the
meter.
If
full
scale
is
exceeded,
then
the
Maximum
Con
‐
trol
Out
should
be
lowered
until
the
flow
rate
no
longer
exceeds
full
scale.
The
Vibratory
Maximum
Control
Out
can
be
entered
in
a
similar
manner
as
the
Vibratory
Minimum
Control
Out
as
described
above.