21
of
23
APPENDIX
Step
Seven
Troubleshooting:
PROBLEM
SOLUTION
TANK
does
not
appear
on
the
main
menu:
Units
function
is
set
for
PERCENT
on
LVU2800
Series:
When
Units
is
set
for
PERCENT
,
the
TANK
function
is
disabled.
To
re
‐
enable
TANK
,
change
units
to
INCHES
,
CM
,
FEET
or
METERS
.
Display
shows
FULL
:
Level
of
liquid
is
above
the
FILL
‐
H
setting:
Check
the
FILL
‐
H
setting,
making
sure
the
FILL
‐
H
setting
is
high
enough
so
the
level
of
liquid
is
below
the
FILL
‐
H
setting.
The
Fill
‐
H
setting
is
the
distance
from
the
bottom
of
the
tank
to
the
Full
level
of
liquid.
Display
shows
EMPTY
:
Level
of
liquid
is
beyond
the
HEIGHT
setting:
Check
the
HEIGHT
setting,
making
sure
the
HEIGHT
setting
is
low
enough
so
the
level
of
liquid
is
above
the
HEIGHT
setting.
Display
shows
WARMUP
:
Typically
occurs
when
power
is
being
applied
to
transmitter.
Indicates
a
weak
power
supply,
bad
wire
connections
or
the
sensor
is
out
of
the
operational
range.
Display
shows
LOST
:
Sensor
is
in
a
Fail
‐
Safe
state.
The
return
sound
pulses
are
not
reaching
the
transducer.
First,
cycle
power
off
and
on,
waiting
5
seconds
between
the
off
and
on
states.
If
problem
persists,
check
the
installation
fitting
against
the
Installation
instructions
in
the
manual.
Display
is
opposite
of
the
measured
value:
Check
the
DISPLAY
setting.
AIR
mode
indicates
the
distance
from
the
liquid
to
the
sensor.
LIQUID
mode
indicates
the
height
of
liquid
in
the
tank.
Change
the
DISPLAY
mode
from
AIR
to
LIQUID
or
vice
versa
to
correct.
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
LVU2800
Series
is
current
limited
to
22
mA.
Anything
above
23
mA
indicates
a
short
circuit.
Содержание LVU2800 Series
Страница 1: ...LVU2800 Series Ultrasonic Level Transmitter...
Страница 2: ...2 of 23...
Страница 22: ...22 of 23...
Страница 23: ...23 of 23 M 5127 0312...
