S p e c i f i c a t i o n s
Operational Hints
•
Never
apply
voltage
to
the
inputs.
•
Temperatur
e
affects
readings
.
Allow
the
CLM100
to
attain
the
ambient
temperature
of
the
wire
under
test.
•
Use
a
9
Vo
lt
alkalin
e
battery
only
•
Use
the
test
leads
that
came
with
the
unit
only.
Other
leads
will
not
work.
•
Ensure
that
the
test
leads
are
clean
and
in
good
working
order.
•
Use
an
abrasive
pad
similar
to
the
one
provided
to
ensure
the
wire
under
test
is
clean
and
free
of
oxidation.
•
Ensure
that
insulation
is
stripped
adequately
from
both
ends
of
the
wire
under
test.
This
will
enable
measurements
to
be
accurate.
•
Ensure
that
the
alligator
clips
are
connected
across
the
diameter
of
the
wire
under
test.
•
When
measuring
wire
for
insertion
into
conduit,
add
extra
wire
to
compensate
for
the
accuracy
of
the
meter.
For
example,
205
feet
of
wire
is
needed
to
run
inside
a
piece
of
conduit
that
is
200
feet
long.
(This
would
allow
2.5
feet
on
each
end
to
attach
the
wire.)
At
205
feet
and
70˚F,
the
cable
length
meter
has
an
accuracy
of
±7
feet.
In
this
case
it
would
be
safer
to
measure
out
212
feet
of
wire.
This
would
ensure
that
enough
wire
is
available
for the
application.
3.
Strip
the
insulation
back
on
each
end
of
the
wire
being
tested.
NOTE:
Make sure both ends of the wire under test are clean and
the conductor is fully exposed. The insulation must be stripped
away so the Kelvin clips can be connected across the diameter of
the wire. Use the abrasive pad to clean the wire ends.
4.
Using
the
selector
on
the
CLM100,
turn
to
the
size
of
wire
under
test.
5.
Press
the
“COPPER”
button
if
copper
wire
is
being
tested.
The
“CU”
enunciator
will
illuminate
in
the
top
left
corner
of
the
display.
6.
Press
the
“ALUM”
button
if
aluminum
wire
is
being
tested.
The
“AL”
enunciator
will
illuminate
in
the
top
left
corner
of
the
display.
7. Press
the
“FT”
button
if
you
require
readings
to
be
in
feet.
The
“ft”
enunciator
will
illuminate
in
the
display.
8.
Press
the
“M”
button
if
you
require
readings
to
be
in
meters.
The
“m”
enunciator
will
illuminate
in
the
display.
9.
Connect
a
Kelvin
clip
to
one
end
of
the
wire
and
the
other
Kelvin
clip
to
the
other
end
of
the
wire.
10. Read
the
length
of
wire
directly
from
the
display.
Please
note
the
“k”
enunciator
illuminates
if
measurements
are
at
or
above
1
000
feet/meters.
11. Disconnect
the
test
leads
from
the
unit
when
not
in
use.
Low Battery Indication
The
“BAT”
enunciator
will
illuminate
in
the
lower
left
side
of
the
display
to
indicate
battery
voltage
is
low.
The
battery
should
be
changed
immediately
to
ensure
proper
function
and
accuracy.
Only
alkaline
9
Volt
batteries
should
be
used.
Measuring Resistance
1. If
the
resistance
to
be
measured
is
wire,
follow
steps
1
through
3
under
“Measuring
Length
of
Wire.”
Then
follow
steps
2
and
3
below.
If
a
discrete
resistor
is
being
measured,
turn
the
cable
length
meter
on
and
perform
the
c
alibration
procedure.
2.
Using
the
selector
on
the
CLM100,
turn
to
“R”
on
the
dial.
3.
Read
the
resistance
of
the
wire
directly
from
the
display.
Measurement
Range:
Accuracy:
Resistance:
Operating
Temperature:
Operating
Humidity:
Storage
Temperature:
Auto
power
off:
Battery
Life:
15
to
30,000
feet
26ga
to
4/0ga
250MCM
to
500MCM
±(2%
of
reading
+3
LSD)
at
65˚
to
75˚F
±(3%
of
reading
+3
LSD)
below
65˚
and
above
75˚F
LSD = least significant digit
0
to
65
Ω
32˚
to
104˚F
20%
to
80%
RH
0˚
to
120˚F
After
5
minutes
(approx.)
Depends
on
use.
Typically
40
hours.
Extended
measurements
times
can
lower
battery
life
to
no
less
than
6
hours.
CLM100-MAN
P. 2
