General Tools and Instruments GTi10-20-30-50 - Manual (Page 33)

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About analysis parameters
Object
Selects the object (a spot or area) whose
parameters you wish to measure.
Emiss
Emissivity is a measure of an object’s reflectivity
in the infrared spectrum. You can optimize the
camera’s measurement accuracy for a specific
object by entering its emissivity within the
Analysis menu. Emissivity is a number with no
units between 0 and 1. A table in the Appendix
lists the emissivities of dozens of common
materials.
Distance
Use this field to enter the actual distance of the
object from the camera. Doing so improves
measurement accuracy.
Amb Temp
Enter the ambient temperature in this field.
Doing so improves measurement accuracy.
Humidity
Enter the ambient humidity in this field. Doing
so improves measurement accuracy.
Comp. Obj.
Comp Obj1 can be set as any spot or area;
Comp Obj2 can be set as a reference
temperature (Ref Temp) or as any spot or area.
The difference between the temperatures of the
two objects will appear at the right bottom
corner of the screen.
Ref Temp
Sets a reference temperature to compare with
the spot/area/profile tool.
The reading of Comp. Obj.
Reading