Inputs
MI3
41
Figure 25: Adjustment of Emissivity at FTC Input (Example)
7.2
Emissivity (digital)
Function:
emissivity (digital control)
Signal:
digital low/high
Terminal:
FTC1-3, GND
The box electronics contains a table with 8 pre-installed settings for emissivity. To activate these
emissivity settings, you need to have the inputs FTC1, FTC2, and FTC3 connected. According to the
voltage level on the FTC inputs, one of the table entries will be activated.
0 = Low signal (0 V)
1 = High signal (from 5 V to V
DC
)
A non-wired input is considered as not defined!
Table entry Emissivity
(Examples)
FTC3 FTC2 FTC1
0
1
2
3
4
5
6
7
1.100
0.500
0.600
0.700
0.800
0.970
1.000
0.950
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Figure 26: Digital Selection of Emissivity with FTC Inputs
The values in the table cannot be changed through the control panel.
7.3
Ambient Temperature Compensation
Function:
Ambient Temperature Compensation
Signal:
0 to 5 V
DC
Terminal:
FTC2, GND
“product 1”
“product 2”
4.0 V (ε=0.9)
1.5 V (ε=0.4)
To the FTC input
of the box
R1 = 200 Ω
R2 = 500 Ω
R3 = 300 Ω
+ 5 VDC
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