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Instruction Manual MM850341 ed.01a
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4
SIGNAL PROCESSING
When a radiation thermometer is employed in an on-line system, its signal may be subjected to large fluctuations.
Time function facilities are useful to retain the signal levels that are more likely to represent the true target
temperature.
Eurotron IR thermometers can be factory pre-set with one of the signal processing facilities: averaging, Track &
Hold, Peak, Valley, Peak-Picking, Valley-Picking, etc.
IRtec Rayomatic 40
functions can be programmed from user by using a Personal Computer, a Bell202/RS232
adapter and a configuration software.
IRtec Rayomatic 20
Average function can be programmed by factory only.
4.1
Average
Rapid temperature fluctuations about a true mean value can make the thermometer output unsuitable for
recording and control. In these cases the average function can be used to provide a smoothed signal. The output
signal Avu is given by:
Avu =Avp + (M – Avp) * 2
∆
T / D
where:
M
= Actual temperature
Avu
= Output average
Avp
= Previous average
∆
T
= sampling time
D
= Damping in seconds (programmable)
Temperature
Temperature with constant D>0
Range 0..99
Actual temperature
(D=0)
Time
4.2
Peak
The Peak function holds a maximum temperature and retain its until a higher value appear or an external reset
signal appear to decay the output to the current temperature measurement.
