20
of
30
MN890570
Rev
A
INSTALLATION
Step
Nine
The
Series
ULS
should
always
be
mounted
perpendicular
to
the
liquid
surface
and
installed
using
the
provided
FKM
mounting
gasket.
Make
sure
that
the
fitting
and
transmitter
threads
are
not
damaged
or
worn.
Always
hand
‐
tighten
the
transmitter
within
the
fitting.
Perform
an
installed
leak
test
under
normal
process
conditions
prior
to
system
start
up.
Note:
The
preferred
mounting
fitting
for
the
Series
ULSS
&
ULSM
is
the
ULS
‐
ACC
‐
121
(2”
thread
x
1”
thread)
reducer
bushing.
Mounting
Guide
1. Do
not
mount
at
an
angle
2. Liquid
should
never
enter
the
dead
band
3. Side
Wall:
a. Mount
at
least
2”
from
the
side
wall
b. For
Series
ULSL
‐
mount
at
least
3”
from
the
side
wall
4. Do
not
mount
where
obstacles
will
intrude
on
sensor’s
beam
width
a. See
Specifications,
Step
Two
5. Do
not
mount
in
a
vacuum
6. Avoid
mounting
in
the
center
of
a
dome
top
tank.
7. In
cone
bottom
tank,
position
the
sensor
over
the
deepest
part
of
the
tank.
Do
not
install
at
angle
relative
to
the
liquid.
Do
not
install
within
2”
of
tank
sidewall.
(3”
for
Series
ULSL)
Do
not
install
with
objects
in
the
beam.
Do
not
install
in
applications
with
vacuum.
Installation
in
existing
fittings:
If
the
existing
fitting
is
larger
than
the
threads
of
the
Series
ULS,
select
a
reducer
bushing
such
as
the
ULS
‐
ACC
‐
121
(2”
thread
x
1”
thread)
or
ULS
‐
ACC
‐
131
(3”
thread
x
2”
thread).
Metal
Tanks
(Series
ULSS
&
ULSM):
Dwyer
Instruments,
Inc
ultrasonic
transmitters
have
been
optimized
for
use
in
non
‐
metallic
fittings.
1. For
best
performance,
avoid
the
use
of
metallic
fittings.
a. Use
a
plastic
2”
x
1”
reducer
bushing,
such
as
the
ULS
‐
ACC
‐
121
or
a
plastic
1”
flange,
such
as
the
ULS
‐
ACC
‐
312
for
metallic
tanks.
2. While
installations
directly
into
a
1”
metal
fitting
are
not
recommended,
acceptable
results
may
be
obtained
if
the
1”
fitting
is
a
half
coupling
in
form
and
the
outer
diameter
of
the
coupling
is
tightly
wrapped
in
vinyl
tape
to
dampen
vibrations.
