InfraTec VarioCam Operating Instructions Manual page 8

Handling
Only use ATA compatible Compact Flash memory cards in the PCMCIA slot of the VarioCAM
head. Otherwise damage to the camera or the memory card can arise, for which no liability will be
accepted.
Changing lenses should not be done in rooms with high dust content or humidity, as the protection
class IP 65 is not guaranteed for a detached lens.
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The VarioCAM
microbolometer detector. The individual detector elements are microscopically small thin layer
resistors on waferthin membranes, which are arranged self-supporting some microns above the
silicon selection circuit. The radiant heat of the scene is mapped from the optics of the
thermography system on to these detector elements and is absorbed by them. This results in a
temperature change in the detector elements, which results in electronic evaluable signals via the
temperature co-efficient of the respective thin layer resistor. The detector elements are installed in
a vacuum casing for the purpose of high sensitivity.
Very high radiant fluxes can result in overheating of these thin layer resistors, which can result in
irreversible changes in their properties. The optics and electronics concept of VarioCAM
designed that object radiation up to 2,000° C occurring in thermographic practice do not cause any
changes in the detector. However, direct sunlight or direct reflections of the same in the VarioCAM
field of view must be absolutely avoided, because these can cause irreversible changes, whose
origin is clearly detectable, in the microbolometer detector. The manufacturer accepts no liability for
damages of this type caused to the microbolometer detector! In certain circumstances, when the
equipment is switched off and directed to the sun, it cannot be ruled out that damage to the
detector occurs, therefore when VarioCAM
place.
4
head thermography system is equipped with a highly-sensitive uncooled
© InfraTec GmbH 2007
Operating Instruction for VarioCAM® head
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head is not in use, the supplied lens cover must be in
2 Device safety information
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is so
Operating Instructions
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