Omega Vehicle Security OS542 manual Operation Instructions, Measuring Trigger, Emissivity

Infrared Thermometer

V. OPERATION INSTRUCTIONS

•Measuring Trigger

To measure a temperature, point the unit at an object and pull the trigger. Be sure to consider distance-to-spot size ratio and field of view. The laser is used for aiming the target for reference. The temperature reading will be updated on the LCD. When the operator releases the trigger, the reading will automatically be held on the LCD for 10 more seconds. After 10 seconds this thermometer will power down itself to save battery.

•Distance to Spot Ratio (D/S)

You have to make sure that the detection area you want to measure is larger than the required spot size to get a correct reading. The temperature you get is an average temperature of the detected region. The smaller the target, the shorter distance is required for the measuring. (Please refer to the diagram on the side of the unit)

Distance : Spot = 8 : 1

22	52	113	Spot Size
200	400
		800
Measuring Distance

Unit : mm

•Emissivity

Emissivity is a term used to describe the energy-emitting characteristics of materials. The higher of this value means the more capability of radiation emittance the materials has. Most organic materials and painted or oxidized surfaces have an emissivity of 0.98. Metal surfaces or shiny materials has a lower emissivity and

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