IS 140 • IGA 140 Manual
Software InfraWin
∂
23
5 Settings/Parameter Descriptions
The pyrometer is equipped with a wide range of settings to ensure accurate temperature
measurement and optimal adaptation to the required measuring conditions.
All instrument settings can be done directly at the instrument or via serial interface and
software InfraWin, user of an own communication software find all interface commands in
Chapter 9, Data format UPP.
Opening the pyrometer parameters window in InfraWin will display the current settings of the
pyrometer. To change a value, either type a new value into an input box or select a preset value
from the list field.
5.1 Factory Settings
Emissivity (
Emi
) = 100%
Exposure time (
t
90
) = min
Clear time (
t
Clear
) = off
Analog output (
mA
) = 0 ... 20 mA
Sub range (
from / to
) same as temperature range
Address (
Adr
) = 00
Baud rate (
Baud
) = 19200 Bd
Temperature display (
C / F
) = °C
Wait time (
t
w
) for RS485 = 10
Interface (
RS485 / RS232
) = RS232
5.2 Emissivity
ε
(Emi)
For a correct temperature measurement, it is necessary to adjust the emissivity. Emissivity is the
relationship between the emission of a real object and the emission of a blackbody radiation
source (this is an object which absorbs all incoming rays and has an emissivity of 100%) at the
same temperature. Different materials have different emissivities, ranging from 0% to 100%.
The emissivity of an object is dependent on the surface condition of the material, the spectral
range of the pyrometer and the measuring temperature. The emissivity setting of the pyrometer
has to be adjusted accordingly (by entering a number between 10 and 100%). Typical emissivity
values of various common materials for the two spectral ranges of the instruments are listed
below. The tolerance of the emissivity values for each material is mainly dependent on the
surface conditions. Rough surfaces have higher emissivities.
Measuring
object
Emissivity [%]
Measuring
object
Emissivity [%]
IS 140
(0.7...1.1 µm)
IGA 140
(1.45...1.8 µm)
IS 140
(0.7...1.1 µm)
IGA 140
(1.45...1.8 µm)
“Black body
furnace“
100
100
Zinc
58
45
to
55
Steel heavily scaled
93
85 to 90
Nickel
22
15 to 20
Steel rolling skin
88
80 t 88
Gold, Silver, bright
2
2
Steel, molten
30
20 to 25
Porcelain glazed
60
60
Slag
85
80 to 85
Porcelain rough
80 to 90
80 to 90
Aluminum, bright
15
10
Graphite
80 to 92
80 to 90
Chromium, bright
28 to 32
25 to 30
Chamotte
45 to 60
45 to 60
Brass oxidized (tarnished)
65 to 75
60 to 70
Earthenware, glazed
86 to 90
80 to 90
Bronze, bright
3
3
Brick
85 to 90
80 to 90
Copper, oxidized
88
70 to 85
Soot
95
95
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