fixed focus

An optical system for a camera or thermal imager that is set to one average distance, resulting

 

in an in-focus range that is not adjustable.

FPA (focal-plane

A rectangular flat-panel matrix of detector elements on which the Thermal Imager’s optical

array)

lenses and filters focus infrared energy to produce a thermal image. The type of FPA used in

 

the Thermal Imager is called a microbolometer. It produces signals that make a new complete

 

thermal image 60 times per second.

focal point

The distance from the lens at which the thermal imager is in focus.

focus distance

The closest distance at which you can focus the thermal image: 11.8 inches or 30 cm.

focusing ring

The movable ring around the front lens that you adjust for the sharpest thermal image. This

 

has no effect on the visual digital camera image.

frame rate

The number of times per second that the Thermal Imager displays a completely updated

 

thermal image: 60 times per second, or 60 Hz (Hertz).

full scale

The minimum temperature and the maximum temperature that the Thermal Imager can

 

measure. When in AUTO RANGE mode, the Thermal Imager adjusts itself to a portion of full

 

scale, called “span” that is somewhere within the full-scale endpoints. Using MANUAL RANGE

 

settings, you can set the Thermal Imager to cover full scale, but usually this makes it more

 

difficult to discern small temperature variations in the thermal image.

function key

The button on the directional keypad. Its function changes depending on what activity is

 

happening. It is often used as the ENTER key to confirm a menu selection.

image

Either a thermal image or a visual image. The Thermal Imager captures both kinds every time

 

you pull the trigger. The pair of images are called an “image set.” When you save, erase, or

 

load an image to a PC, both the thermal and visual images always stay bundled together.

M12 160x120 Thermal Imager Operator's Manual

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Milwaukee 2260-21 Fixed focus, FPA focal-plane, Array, Focal point, Focus distance, Focusing ring, Frame rate, Full scale

2260-21 specifications

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