8
Power / SetUp
POWER CHECK and Troubleshooting
1. POWER SOURCE
Check
to
be
sure
the
system
has
primary
DC
power
applied.
Power
should
be
between
8Vdc
and
18Vdc
if
powered
from
truck
electrical
or
greater
than
6Vdc
using
fresh
"AA"
batteries
if
utilizing
internal
battery
pack.
2. POWER-UP
Press
the
small
UNITS (Power)
button
to
turn
on
Indicator
.
The
Indicator
should
show
the
Firmware
version
(A301 v4.
16
)
,
then
count
down
from
9
to
0
and
then
display
READY
.
PRIMARY POWER PROBLEMS:
If the system does not turn ON or not stay ON, or
i
f the system turns OFF unexpectedly:
1. If
no
characters
are
displayed,
if
no
back
light
is
seen,
check
the
Primary
Power
wiring and
connections.
Truck
power
should
be
in
the
range
of
11
to
13.8Vdc.
If
a
Voltage
Converter
is
installed,
Primary
Power
to
the
Indicator
should
be
the
labeled
Output
Voltage
+/-
20%
Check
for
correct
Voltage
polarity
at
the
Indicator
Connection.
Note:
Use
a
Voltmeter,
if
possible,
to
verify
that
the
proper
Voltage
and
polarity
is present
at all test points.
2. If
the
wiring
to
the
scale
indicator
is
equipped
with
a
fuse,
check
the
fuse.
Note:
The
standard
LTWS-1
hydraulic
weighing
systems
normally
consume
less
than 0.200
Amperes (200 milli-Amp).
The purpose of a in-line fuse is to protect the truck electrical from a catastrophic short in
the weighing system electronics and electrical wiring.
This fuse rating should be in the range of
1.0
Amperes to 10 Amperes.
3. When
measuring
Primary
Truck
Voltage,
the
indicated
Truck
Voltage
should
not
vary
by
more
than about 0.1 V between when the indicator is turned ON and turned OFF.
Truck
electrical
systems,
especially
older
trucks,
commonly
utilize
the
truck
frame
as
the
common
or
negative
connection
to
the
battery.
It
is
not
unusual
to
experience
high
resistance
caused
by
corrosion
or
loose
fitting
of
the
elements
of
the
chassis
between
the
battery
terminal
and
the
primary
power
to
the
indicator.
Summary of Contents for RINSTRUM K356
Page 19: ...19 ...
