SYS11000OM Rev G
[UF 350-HD, Generic Template]
FLIR Systems Polytech AB
Page
64
of
70
Antennvägen 6
SE-187 66 Täby
Sweden
2.5
Tools and Equipment List
2.5.1
Recommended Maintenance tooling:
Desiccator removal tool
Protective hood (Optional blanket style hood to protect gimbal from direct sun,
and rain).
Transportation and storage container
Socket for castle head nuts on linear mount
Lens cleaning equipment (cloth and soapy solution)
Nitrogen Purge Kit (GEN00011)
Dessicator Dryer Kit (GEN00035)
2.5.2
Purging process
The purging process consists of connecting a low pressure regulated nitrogen supply to
a special adapter that screws into the desiccator fixing. A flow of gas passes through
the system and exits via the breather desiccator at the rear of the TCU. The purging
adapter is equipped with a pressure relief valve ensuring excessive pressure is not built
up within the system. It is suggested that the system is purged when the desiccator
indicator on the TCU shows a pink color and also periodically once per month as a
precautionary measure.
1) Replace the desiccator indicator with the purging adapter. For desiccant
maintenance, see § 1.2.4.
2) Connect the purging adaptor and precision regulator to a dry nitrogen source which
will typically be a bottle equipped with a regulator to provide an absolute maximum
pressure of 30 PSI (2Bar). For safety reasons it is recommended to set the pressure to
approximately 10 PSI (0.7Bar).
3) Increase the gas flow at the precision regulator to 3PSI (0.2 Bar). Gas will be heard
escaping from the vent plug.
4) It is recommended that the system is purged for a minimum of 1 hour. The purging
process will be more effective if the TCU internal components are still warm from
previous operation.
5) On completion of the purge process replace all 3 desiccators.
