12 - 3
Cyclops L
Portable Thermometers
User Guide
12.3 Fitting and Using a Long Eye Relief (LER) Adaptor
The Cyclops Long Eye Relief (LER) adaptor (804685) is
an accessory which enables Cyclops thermometer users
to be able to see the full field of view, the measurement
circle and the internal temperature display, whilst the
rear of the instrument is being held away from the eye.
This is intended for users wearing helmets, goggles or
other eye protection devices.
Note
Before installing the LER adaptor, examine the smaller diameter end of the
unit and ensure that there is a glass disc approximately 2 mm in from this
end. The plane of the glass disc is offset at a small angle (~10°) relative
to the optical axis (See Fig. 12-7).
The glass disc is an infrared absorbing filter and is essential for eye safety when
viewing very hot targets.
12.3.1 Instructions for Installation
1) Unscrew the focus adjustable eyecup anti-
clockwise to extend the eyepiece length as
far as possible away from the main body of
the thermometer (Fig. 12-8).
2) Using the screwdriver included with the kit,
loosen and remove the 3 x M2, pointed end
grub screws securing the eyecup holder to
the eyepiece body (Fig. 12-9).
3) Lift the eyecup away from the rear of the
eyepiece. Keep the eyepiece in a secure
location, for possible future re-fitting
4) Insert the new LER adaptor into the end of
the eyepiece and rotate until the 3 body
indentations are aligned with the screw
holes (Fig. 12-10).
Glass disc
Fig. 12-7 LER Adaptor
Fig. 12-9
Fig. 12-8
