IR267
‐
en
‐
GB_v1.1
8/16
7
Emissivity
The
Emissivity
setting
is
shown
in
small
digits
at
the
lower
left
corner
of
the
display.
To
adjust
the
Emissivity
please
refer
to
the
Settings
mode
section.
Emissivity
represents
the
reflectivity
of
a
material.
Most
organic
materials
and
painted
or
oxidized
surfaces
have
an
emissivity
of
approximately
0.95.
If
possible,
masking
tape
or
flat
black
paint
should
be
applied
to
cover
the
measured
surface.
Wait
a
period
of
time
to
allow
the
tape
or
paint
to
reach
thermal
equilibrium
with
the
surface
of
the
covered
object.
Measure
the
temperature
of
the
surface
covered
with
tape
or
paint
only
after
equilibrium
has
been
achieved.
Another
way
to
find
the
emissivity
of
a
surface
is
to
use
the
Type
‐
K
thermocouple
to
take
a
contact
temperature
reading.
Note
this
reading
and
then
take
a
non
‐
contact
temperature
reading
and
adjust
the
emissivity
until
the
non
‐
contact
measurement
matches
the
contact
measurement.
Emissivity
Factors
for
Common
Materials
Material
under
test
Emissivity
Material
under
test
Emissivity
Asphalt
0.90
to
0.98
Cloth
(black)
0.98
Concrete
0.94
Skin
(human)
0.98
Cement
0.96
Leather
0.75
to
0.80
Sand
0.90
Charcoal
(powder)
0.96
Soil
0.92
to
0.96
Lacquer
0.80
to
0.95
Water
0.92
to
0.96
Lacquer
(matt)
0.97
Ice
0.96
to
0.98
Rubber
(black)
0.94
Snow
0.83
Plastic
0.85
to
0.95
Glass
0.90
to
0.95
Timber
0.90
Ceramic
0.90
to
0.94
Paper
0.70
to
0.94
Marble
0.94
Chromium
Oxides
0.81
Plaster
0.80
to
0.90
Copper
Oxides
0.78
Mortar
0.89
to
0.91
Iron
Oxides
0.78
to
0.82
Brick
0.93
to
0.96
Textiles
0.90
High
and
Low
Temperature
Alarms
The
IR267
has
a
low
alarm
and
a
high
alarm
utility.
Set
the
low
and
high
alarm
limits
in
the
Settings
mode.
See
the
Settings
mode
section
for
details.
The
low
and/or
the
high
alarms
can
also
be
disabled
in
the
Settings
mode.
When
the
low
or
high
alarm
limits
are
reached
the
L
(low
alarm)
or
H
(high
alarm)
icon
will
blink
and
the
alarm
buzzer
will
sound
(the
buzzer
can
be
disabled
in
the
Settings
mode.
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.com
1.800.561.8187
