LumaSense Technologies IGA 6/23 Advanced - Manual (Page 24)

IGA 6/23 Advanced Manual Settings / parameter descriptions · 24
Measuring object
Emissivity [%]
(at 2.3 µm)
Measuring object
Emissivity [%]
(at 2.3 µm)
“Black body furnace“ 100 Steel, molten 20 to 30
Extruded Aluminum 13 Nickel 15 to 20
Brass 18 Titanium, non-oxidized 50
Brass oxidized (tarnished) 65 to 70 Titanium, oxidized 75 to 80
Copper 5 Molybdenum 10
Copper, oxidized 70 to 80 Molybdenum, oxidized 75 to 80
Inconel 30 Black Carbon 95
Inconel, oxidized 85 Graphite 80 to 90
Oxidized Iron 85 to 90 Stoneware, glazed 60
Steel rolling scale 80 to 88 Porcelain rough 80 to 90
Note: Emissivity e can be set from 5% to 100% in steps of 0.1%
4.4 Transmittance t
Transmittance is a parameter that can compensate for signal loss due to external windows etc.
For example, if the emissivity of the material is 0.6 and the transmittance of an additional
window is 0.9, then the product would be 0.54 which is well inside the allowed range.
The product of transmittance and emissivity ( t x
e
) must not be less than 5% .
Note: Transmittance t can be set from 5% to 100% in steps of 0.1%
4.5 Response Time (t
90
)
The response time t
90
is the time interval for the analog output of the pyrometer to go from a
low temperature value up to 90% of the temperature step to a high value when measuring an
abrupt increase from said low to said high temperature.
The dynamic exposure time adjustment prolongs the exposure time at the lower range limit.
With the InfraWin software and the UPP Data Format commands it is possible to configure the
dynamic exposure time.
Dependency of the response time on the temperature value
MB 10 Temperature value 60 °C 120 °C 150 °C
t
90
min 2 ms 1 ms 0.5 ms
MB 13 Temperature value 100 °C 150 °C 200 °C
t
90
min 2 ms 1 ms 0.5 ms
MB 18 Temperature value 200 °C 250 °C 300 °C
t
90
min 4 ms 1 ms 0.5 ms
Independently of this, the pyrometer performs a measurement every 25 µs and updates the
analog output. Slower response times can be used to achieve a constant temperature reading
for measuring objects that have rapidly fluctuating temperatures.
The response time is set using the InfraWin software or by using the UPP Data Format commands.
When the setting is set to min., the IGA 6/23 Advanced operates using a time constant of