8.2
Electrical
noisy
environments
AC
power
lines,
pumps,
power
inverters,
and
motors
can
be
the
source
of
electrical
noise.
If
the
sensor
or
data
logger
is
located
in
an
electrically
noisy
environment,
the
sensor
should
be
measured
with
the
60
or
50
Hz
rejection
option.
8.3
Long
cable
lengths
Cable
resistance
can
cause
significant
error.
The
4-wire
configuration
is
the
best
configuration
for
long
cable
lengths.
The
heat
shrink
label
on
the
110PV
cable
provides
the
cable
resistance
(ohms).
When
using
the
2-wire
configuration,
subtract
this
cable
resistance
from
the
measured
resistance
value.
Additional
settling
time
may
be
required
for
cable
lengths
longer
than
300
feet,
where
settling
time
is
the
delay
before
the
measurement
is
made.
Longer
settling
times
can
be
typed
into
the
Settling
Time
parameter
in
the
BrHalf4W()
or
BrHalf()
instruction.
9. Maintenance
and
troubleshooting
NOTE:
For
all
factory
repairs,
customers
must
get
an
RMA
number.
Customers
must
also
properly
fill
out
a
“Declaration
of
Hazardous
Material
and
Decontamination”
form
and
comply
with
the
requirements
specified
in
it.
Refer
to
the
Read First
page
at
the
front
of
this
manual
for
more
information.
9.1 Troubleshooting
Symptom: Temperature is NAN, –INF, –9999, –273
Verify
the
red
wire
is
connected
to
the
correct
single-ended
analog
ue
input
channel
as
specified
by
the
measurement
instruction,
the
black
wire
is
connected
to
the
switched
excitation
channel
as
specified
by
the
measurement
instruction,
and
the
purple
wire
is
connected
to
data
logger
ground.
110PV Surface Temperature Probe
14