Rev
5
MN890570
29
of
30
TROUBLESHOOTING
Step
Twelve
PROBLEM
SOLUTION
Transmitter
indicates
a
current
of
0
mA
Check
the
wiring
for
an
open
circuit.
An
open
circuit
is
the
most
common
issue
with
a
0
mA
signal.
Transmitter
jumps
to
a
current
reading
between
19
and
20
mA
Check
the
installation
of
the
transmitter.
Bad
installation
fittings
will
cause
false
signals
near
the
top
of
the
tank,
which
typically
translates
to
a
signal
between
19
and
20
mA.
Also
look
for
interference
just
below
the
transmitter.
If
the
transmitter
is
installed
in
a
metal
fitting,
switch
to
a
plastic
fitting.
Transmitter
indicates
a
current
over
23
mA
Immediately
check
the
wiring
for
a
short
circuit.
The
Series
ULS
is
current
limited
to
22
mA.
Anything
above
23
mA
indicates
a
short
circuit.
Transmitter
always
jumps
to
the
LOST
condition
Check
the
dimensional
configuration
(
Height
and
Fill
‐
H
)
of
the
Series
ULS.
Make
sure
that
the
Fill
‐
H
setting
corresponds
to
the
full
level
of
liquid
(from
the
bottom
up)
and
not
the
distance
from
the
transmitter
to
the
liquid
(top
down).
Output
of
transmitter
is
opposite
of
the
level
of
liquid
Check
the
Output
at
Empty
Setting.
No
Unit
Detected
in
ULSX
‐
CAL
ULSX
‐
CAL
cannot
detect
a
Series
ULS
connected
to
the
computer.
Check
that
the
Fob
is
connected
to
the
USB
port.
Check
that
all
four
wires
(Red,
Black,
White
and
Green)
are
securely
attached
to
the
Fob.
Check
in
Device
Manager
that
drivers
are
present
under
Universal
Serial
Bus
controllers.
Internet
error.
The
server
name
or
address
could
not
be
resolved.
This
is
a
warning
indicating
the
computer
configuring
Series
ULS
is
not
connected
to
the
internet.
Click
OK
to
continue.
Dwyer
Instruments,
Inc
recommends
being
connecting
to
the
internet
for
all
configurations.
Not
being
connected
to
the
internet
will
not
prevent
the
Series
ULS
from
being
configured.
Cannot
access
some
of
the
features
in
Configuration
As
choices
are
made
in
Configuration,
ULSX
‐
CAL
will
begin
to
eliminate
functions
that
are
no
longer
active.
To
reset
Configuration
or
get
access
to
all
the
features,
click
on
the
Clear
Screen
button.
Relay
closes,
but
does
not
open
again
An
inductive
kick
may
be
holding
the
relay
closed.
If
switching
24
VDC,
make
sure
a
diode
has
been
installed
to
act
as
a
snubber
(see
Step
Eight).
Note:
Series
ULS
uses
latching
relays.
When
power
is
removed
to
the
sensor,
the
relays
will
remain
in
their
last
state.
Ex:
If
the
relay
is
energized,
when
power
is
removed,
the
relay
will
remain
in
an
energized
state.
Relay
chatters
on
and
off
repeatedly
Most
likely
the
turbulence
in
the
tank
is
causing
the
chatter.
Increase
the
Hysteresis
setting
to
correct.
