FLIR GFx320, User Manual

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Cooler maintenance
36
36.1 General
The microcooler is designed to provide maintenance-free operation for many thousands
of hours. The microcooler contains pressurized helium gas.
After several thousand hours of operation the gas pressure decreases, and cooler serv-
ice is required to restore cooler performance. The cooler also contains micro ball bear-
ings, which may exhibit wear by becoming louder.
36.2 Signs to watch for
The FLIR Systems microcooler is equipped with a closed-loop speed regulator, which
adjusts the cooler motor speed to regulate the detector temperature.
Typically, the cooler runs at maximum speed for 7–10 minutes (depending on model),
and then slows to about 40% of maximum speed. As the gas pressure degrades, the mo-
tor continues at maximum speed for longer and longer periods to attain operating
temperature
Eventually, as the helium pressure decreases, the motor will lose the ability to achieve
and/or maintain operating temperature. When this occurs, the camera must be returned
to FLIR Systems Customer Service Department for service.
#T810169; r. AN/42241/42268; en-US 105