LumaSense Technologies ISR 6 Advanced - Manual (Page 25)

ISR 6 Advanced Manual Settings / parameter descriptions · 25
AUTO The AUTO mode is used for discontinuous measuring tasks. For example,
when objects are being transported on a conveyer belt and pass the
measuring beam of the pyrometer only for a few seconds. In this case, the
maximum value for each object has to be obtained.
With the AUTO mode, the maximum value is stored until a new hot object
appears in the measuring beam. The temperature, which has to be
recognized as “hot” is defined by the low limit of the adjusted sub range.
The stored maximum value will be deleted once the temperature of the new
hot object exceeds the low limit of the sub range by 1% (transition in
positive direction) or by at least 2 °C. This is also valid if the sub range equals
the basic range.
HOLD The HOLD function allows you to freeze the current temperature reading at
any moment. This feature is activated using an external switch that has been
connected between connector pins J and K.
The temperature reading will remain frozen as long as the contact remains
closed.
4.7 Analog Output
The analog output has to be selected according to the signal input of the connected instrument
(controller, PLC, etc.). If 4 to 20 mA is set, the analog output gives 3.9 mA for temperatures
below lower range limit.
Note: Settings for Analog Output : 0 to 20mA or 4 to 20mA
4.8 Relative Signal Strength
Relative signal strength stands for the product of emissivity, surface coverage, and transmission
of the material between the object and the pyrometer. Refer to Section 4.8 for more
information on Relative Signal.
4.9 “Dirty Window” Warning
The ISR 6 Advanced 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.
The warning level can be set between 0 and 99%. 0% means the “dirty window” warning
system is switched off (factory setting) and the relay can perform the function external clearing
of maximum value storage, when it is activated (see section 4.6.2 Clear Time Settings).
Note: Settings for “Dirty Window” Warning: 0 (off) to 99%.
4.10 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 spot is not filled by the measuring object.