User Guide

427-0075-01-12 Revision 140 October 2019 52
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Basic Operation and Configuration
Files > Log > Field Support Log
Scroll down and select the button under Field Support Log to download a zip file to the
computer for field service evaluation.
2.5 Thermal Imaging Overview
PT-602CZ HD Only—When power is applied to the PT-602CZ HD camera, a compact integral
Stirling cooler (also known as a cryocooler) starts automatically. The cryocooler makes an audible
noise when it is operating, and requires up to 8 minutes to cool the thermal imager down to its
operating temperature. When cooling down, the thermal video image shows a blue screen with the
note:
Unit cooling, kindly wait.
The thermal camera makes an image based on temperature differences. In the thermal image, by
default the hottest item in the scene appears as white and the coldest item is black, and all other
items are represented as a gray scale value between white and black.
It may take some time to get used to the thermal imagery from the camera, especially for someone
who only has experience with normal daylight cameras. Having a basic understanding of the
differences between thermal and daylight cameras can help with getting the best performance from
the thermal camera.
Both thermal and daylight cameras have detectors (pixels) that detect energy. One difference
between thermal and daylight cameras has to do with where the energy comes from to create an
image. When viewing an image with an ordinary camera, there has to be some source of visible light
(something hot, such as the sun or lights) that reflects off the objects in the scene to the camera. The
same is true with human eyesight; the vast majority of what people see is based on reflected light
energy.