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4.6 Internal signal processing
Temperature
↓
Switch point
4.7 Analogue output
The infrared temperature sensor is equipped with an analogue output OUT2
4...20 mA. The maximum load is 500 Ω. Der Ausgangsstrom ist linear zur gemess-
enen Temperatur� The output current is linear to the measured temperature� Within
the overall measuring range, the required measuring range can be set to °C or °F
using parameter [ASP2] (scale beginning) and parameter [AEP2] (scale end)�
Emissivity of materials:
The infrared temperature sensor reacts to the thermal energy (infrared
radiation) emitted by an object� The ability to radiate heat depends on the
type of material and its surface properties� A description of the calculation
of emissivity is in Chapter 13/ Page 23� The ability of a body to emit infrared
radiation is expressed by a material constant called emissivity coefficient or
just emissivity� This coefficient lies between 0 and 100 %� A body with ideal
radiation (black body) has a coefficient of 100 %� At the same temperature,
bodies with real radiation emit a lower radiation� Therefore, the emissiv-
ity coefficient is < 100%� Um mit dem Infrarot-For this reason, adjust the
emissivity coefficient of the target object on the infrared temperature sensor
to be able to determine the exact temperature� With the configured lower
emissivity coefficient, the infrared temperature sensor automatically com-
pensates for the lower radiation�
• Emissivity: [EF] → [EPS1] = x s
→
no / nc
→
Lower- / upper threshold
delay
↓
Switching
UK
9
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