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RayTek MI Miniature Infrared Sensor Thermometer User Manual

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Installation

24 MI

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”.



Figure14:AdjustmentofEmissivityatInputFTC1(Example)

“product 1”

“product 2”

4.0 V (ε=0.9)

1.5 V (ε=0.4)

To the input FTC1

of the sensor

R1 = 200 Ω

R2 = 500 Ω

R3 = 300 Ω

+ 5 VDC

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