Installation
5.4.1
Emissivity
Setting
(analog
controlled)
The
input
FTC1
can
be
configured
to
accept
an
analog
voltage
signal
(0
to
5
VDC)
to
provide
real
time
emissivity
setting.
The
following
table
shows
the
relationship
between
input
voltage
and
emissivity.
U in V
0.0 0.5 … 4.5 5.0
Emissivity
0.1 0.2 … 1.0 1.1
Table
4:
Ratio
between
Analog
Input
Voltage
and
Emissivity
Example:
The
process
requires
the
setting
of
emissivity:
•
for
product
1:
0.90
•
for
product
2:
0.40
Following
the
scheme
below,
the
operator
needs
only
to
switch
to
position
“product
1”
or
“product
2”.
+ 5 VDC
“product 1”
R1 = 200
Ω
4.0 V (
ε
=0.9)
To the input FTC1
of the sensor
R2 = 500
Ω
1.5 V (
ε
=0.4)
“product 2”
R3 = 300
Ω
Figure
14:
Adjustment
of
Emissivity
at
Input
FTC1
(Example)
24
MID
Содержание 54301
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