User manual
Installation
MI 27
• Ambient background temperature compensation from a second
temperature sensor (infrared or contact temperature sensor)
ensures extremely accurate results. For example, the output of
the second unit, set for mV output, could be connected to the
FTC2 analog input (0 to 5 VDC corresponding to low end and
high end of
temperature range) is utilized for real time
compensation, whereby both sensors must be set on the same
temperaturerange.
Figure16:PrincipleofAmbientBackgroundTemperature
Compensation
Sensor 2
targeted
to ambien
t
Sensor 1
targeted
to ob
j
ec
t
Thermal radiation
of ambient
Thermal radiation
of target
0
–
5 VDC
analog outpu
t
at FTC2 inpu
t
Furnace wall
Target object