12
of
14
MN301030
Rev
B
INSTALLATION
Step
Nine
The
LD30
series
is
designed
to
operate
with
only
the
installation
thread
being
exposed
to
the
fluid.
Avoid
installing
the
level
transmitter
along
the
bottom
of
the
tank
as
materials
such
as
sludge
will
build
up
and
coat/cover
the
port.
1.
Location:
Select
a
location
where
the
temperature
of
the
transmitter
will
be
between
0
and
175°F
(
‐
18
to
79°C).
Distance
from
the
receiver
is
limited
only
by
total
loop
resistance.
The
tubing
or
piping
supplying
pressure
to
the
unit
can
be
practically
any
length
required
but
long
lengths
will
increase
response
time
slightly.
2.
Position:
The
transmitter
is
not
position
sensitive.
However
all
standard
models
are
originally
calibrated
with
the
unit
in
a
position
with
the
pressure
connection
downward.
Although
they
can
be
used
at
other
angles,
for
best
accuracy
it
is
recommended
that
units
be
installed
in
the
position
calibrated
at
the
factory.
3.
Pressure
Connection:
Use
a
small
amount
of
plumber’s
tape
or
other
suitable
sealants
to
prevent
leaks.
Be
sure
the
pressure
passage
inside
the
port
is
not
blocked.
4.
Electrical
Connections:
Wire
Length
‐
The
maximum
length
of
wire
connecting
the
transmitter
and
receiver
is
a
function
of
wire
size
and
receiver
resistance.
Wiring
should
not
contribute
more
than
10%
of
the
receiver
resistance
to
total
loop
resistance.
For
extremely
long
runs
(over
1000
feet),
choose
receivers
with
higher
resistance
to
minimize
the
size
and
cost
of
connecting
leads.
Where
wiring
length
is
under
100
feet,
wire
as
small
as
22
AWG
can
be
used.
