ISR 320 Manual
Settings / parameter descriptions
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4.7
Relative Signal Strength
Relative signal strength stands for the product of emissivity, surface coverage, and transmission
of the material between object and pyrometer.
4.8
“Dirty Window” Warning
The ISR 320 pyrometers are equipped with a warning level “dirty window” monitoring system.
A correct temperature measurement might be impossible if the ratio pyrometer is working at a
too low signal level. To avoid these wrong measurements in advance, a warning signal can be
set to a certain contamination level. A built-in relay switch can be used to switch to a warning
signal when the incoming radiation becomes too low (for configurations of limit switch please
see section 4.15).
The warning level can be set between 0 and 99%. 0% means the “dirty window” warning
system is switched off (factory setting). If signal intensity is lower than the set “dirty window”
warning threshold, the green LED at the backside of the instrument will flash.
Note:
Settings for “Dirty Window” Warning: 0 (off) to 99%. If signal intensity is
lower than the set warning threshold, the green LED on the backside of the
instrument will be flashing.
4.9
Minimum Intensity Switch-Off Level
The minimum intensity switch-off level is a function that is used to avoid measuring errors
caused by signals, which are too low. This may e.g. be caused by a dirty viewing window, dust in
the field of view, or when the measuring object does not fill the spot.
Note:
Settings for Minimum Intensity Switch-Off Level: 2% to 50%
Ratio pyrometers are able to measure temperatures correctly even with very low signals. If the
signal is too low for a correct measurement, the pyrometer interrupts the measurement and
displays 1 °C below of beginning of the temperature range.
Although the factory default is set to 10%, switch-off limit can be adjusted between 2 and 50%,
depending on the application.
Note:
The smaller the value, the higher the chance that daylight or reflections will
affect a correct temperature measurement.
4.10
Operating Modes
Ratio (2-color) mode is the factory default-operating mode for the ISR 320 pyrometer. However,
the device can be set to mono (1-color) mode using the InfraWin software or by using the UPP
Data Format commands.
With 1-color mode, the device adjustments are simplified by sending the emissivity corrected
one channel temperature to the analog output.
For a correct measurement in the 1-color mode, it is necessary to adjust the emissivity using the
InfraWin software or by using the UPP Data Format commands. This 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.
Содержание ISR 320
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