IS 12 / IGA 12 Manual Maintenance • 33
7 Maintenance
7.1 Cleaning the front window
Since the device does not contain parts that require regular maintenance, the only regular
maintenance required is periodic inspection of the front window for build-up of foreign
particiles. If allowed to build up, the particles can influence the energy received by the
instrument.
The window is not water soluable and can be cleaned with standard lens tissue dampened with
a commercially available glasses or camera lens cleaning solution. Use a soft blower/brush
(available in camera stores) to remove any grit on the window before you rub the lens with lens
tissue and solution.
Attention: NEVER CLEAN THE WINDOW WITH A DRY TISSUE OF ANY KIND! The
only time dry lens tissue may be used is to dry a window which has already been
cleaned with wet lens tissue.
7.2 Changing of optics
Series 12 pyrometers are equipped either with a fixed optics or a focusable optics. Fixed or
focusable optics cannot be changed against each other. Only the same type of optics can be
replaced. Replacement optics with different measuring distances can be used without
recalibration of the instrument. Replacement may be necessary if the lens is scratched or the
pyrometer will be used for other measuring distances.
7.2.1 Fixed optics replacement
A suitable objective wrench is required to replace fixed optics. The replacement optics consists of
the lens support and a fixed lens. A sticker with the optic data is fixed inside the lens support.
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