RayTek MI Miniature Infrared Sensor - Manual (Page 50)

Operation
42 MI
6.4.4 Advanced Peak Hold
This function searches the sensor signal for a local maximum (peak)
and writes this value to the output until a new local maximum is
found. Before the algorithm restarts searching for a local maximum,
the object temperature has to drop below a predefined threshold. If
the object temperature raises above the held value which has been
written to the output so far, the output signal follows the object
temperature again. If the algorithm detects a local maximum while
the object temperature is currently below the predefined threshold
the output signal jumps to the new maximum temperature of this
local maximum. Once the actual temperature has passed a maximum
above a certain magnitude, a new local maximum is found. This
magnitude is called hysteresis.
Figure 28: Advanced Peak Hold
The advanced peak hold function is only adjustable by means of the
DataTemp MultiDrop Software.
output temperature
object temperature
hysteresis
th
reshold
Temp
Time