6 Data Interface
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y = 0,03x - 30
-30
0
30
60
90
0
1000
2000
3000
4000
12-bit value
te
m
p
er
at
u
re [
°C
]
6.3
Consideration of the emission ratio
Every material has his own emissivity value for IR, so the measured value is not equal to the real
temperature. The best result can be reached with materials that have emissivity ratio near to 1.0
(100%).
The following formula allows correcting the temperature value, when the emissivity ratio is known:
4
4
4
4
)
1
(
]
[
ε
ε
b
m
t
T
T
K
T
⋅
−
−
=
with
: Corrected value in Kelvin
]
[
K
T
t
m
T
: Measured value in Kelvin
b
T
: Background temperature in Kelvin
ε
: Emission ratio
Notes:
•
Normally the background temperature can be assumed to be equal to the environmental
temperature.
•
The emission grades of many different materials can be found on various internet sources.
6.4
Gigabit Ethernet
The IRC-320 cameras are equipped with a 1000Base-T Ethernet interface (RJ-45 connector). The data
connection between camera and PC can be established via a standard CAT5e patch cable. The Gigabit
Ethernet models of this camera internally use Camera Link signals, so many of the facts mentioned in
the chapter 6.1 are also valid for the Gigabit Ethernet interface option. For details one can refer to the
Pleora iPORT PT1000-VB Documentation.
VDS Vosskühler GmbH
IRC-320
