Instructions For Pro-77Ir - Arexx Pro Mode D'emploi

2.2. INSTRUCTIONS PRO-77ir
Connect the infrared sensor cable and insert
the batteries into the infrared sensor.
Start by inserting the plug
of the external temperature probe.
E
If the plug is not properly inserted or
N
the external probe is faulty, a 0 value
will be displayed!
G
L
I
S
H
After inserting the batteries, the sensor
immediately transmits its first sensor data.
Infrared temperature measurement
Measuring temperature by infrared assumes
knowledge about the relation between emitted
infrared radiation and the temperature of the surface.
The amount of radiation is related to the material of the surface and is
expressed by the emissivity coefficient ε.
This coefficient ranges from 0 to 1, where typically the human skin has
an emissivity near 1, as most metals have a small emissivity.
Table 1 (page 53 and 54) gives some typical values for emissivity.
In order to measure the temperature of a surface, the correct coeffi-
cient value should be given. Also, notice that the surface temperature
may differ from the core temperature of a (physical) body. The PRO-IR
sensor uses the emissivity coefficient to calculate the temperature from
received infrared radiation.
PRO-77ir
Fig. 5. Sensor placement
IR-Sensor
Fig. 4. Battery placement
Fig. 6. Sensor switches
19