M-Series Overview
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432-0003-00-10 Rev 150 — M-Series Operator’s Manual
one JCU is installed in the system, a camera can respond to commands from any
JCU that is in the system.
Typically, the JCU and the video monitor are mounted in close physical proximity,
as a pair, so you can immediately see the changes on the video screen when you
use the JCU to change the camera position (pan or tilt).
In a simple installation, the JCU can be directly connected to the camera with the
supplied double-shielded Ethernet cable. In this case, the JCU draws its power
from the camera. In more complex installations, the camera and JCU can be
interconnected using a network switch. If the network switch does not have
Power over Ethernet (PoE) capability, a PoE injector can be used to provide
power to the JCU. FLIR PoE injectors are available from your FLIR authorized
dealer or integrator.
Contact FLIR for more information regarding available accessories including
JCUs, PoE equipment, video distribution amplifiers, cables, connectors,
mounting hardware, and so on. Contact information is listed on the back of this
manual.
Video Display
The M-Series thermal imager does not produce images from visible light like an
ordinary camera does or like the human eye does. Rather, it uses energy
contained in the infrared band to produce images by sensing subtle differences in
temperature and generating images based on those differences.
Thermal Imaging
The thermal imaging camera relies on the fact that all objects, even very cold
objects like ice, emit thermal energy in the portion of the infrared spectrum that
this camera can see, the long wave infrared (LWIR). Therefore, unlike an
illuminated infrared camera, the thermal imaging camera does not need an
additional active illumination source and images are based on directly radiated
rather than reflected energy.
When the thermal camera is in white-hot mode, the warm objects in the scene
display as white, or lighter shades of gray, and cold objects display as black or
darker shades of gray. When you switch the video polarity, this is reversed.
This is why you will see hot objects such as parts on an outboard motor that
appear white (or black, or red depending on the video image mode selected),
while the puddles of water and other cold objects appear dark (or cool). Scenes
with familiar objects will be easy to interpret with some experience. The camera
automatically optimizes the image to provide you with the best contrast in most
conditions.
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