7
IR270
‐
en
‐
GB_V1.0
12/17
Emissivity
Adjust
(EMS)
Use
the
M
button
to
step
to
the
EMS
parameter.
Use
the
arrow
buttons
to
set
the
desired
emissivity
value
(shown
on
the
upper
right).
The
emissivity
can
be
adjusted
between
0.10~1.00.
Refer
to
the
Emissivity
Considerations
section
for
more
information.
Emissivity
Considerations
Emissivity
represents
the
reflectivity
of
a
material.
For
this
meter,
the
emissivity
can
be
adjusted
from
0.10~1.00
(see
Emissivity
Adjust
section
above).
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.
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
