Installation
•
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
temperature
range.
Target object
Furnace wall
0 – 5 VDC
analog output
at FTC2 input
Thermal radiation
of ambient
Thermal radiation
of target
Sensor 1
targeted
to object
Sensor 2
targeted
to ambient
Figure
16:
Principle
of
Ambient
Background
Temperature
Compensation
MID
27