BOREAL LASER GasFinder FC, Operation Manual

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3.1
Boreal Laser Inc. GasFinderFCr Operation Manual — Installation July 17th 2017
Section 3. Installation
Safety Issues
Caution : — The laser output from the GasFinderFC has very low power
(conforms to Class 1 as per IEC 60825-1) and will not damage eye tissue.
However, it is the recommendation of Boreal Laser Inc. that, as with ANY LASER
SYSTEM, the user/ operator should avoid staring directly into the output aperture of
the instrument. Note that the laser beam is infra-red and is not visible to the eye.
Tools Required : Electrician’s hand tools, set of Allen keys.
The Boreal Laser Inc. fi breoptic test kit is recommended.
Gasfi nderFCr
The GasFinderFCr fi ts into a cabinet with
a standard 19” (485mm) rack and is 3U
(132mm) high. If the cabinet is mounted to
a wall or access to the rear is diffi cult then
a hinged cabinet is required. This allows
the cabinet to swing outwards and makes
the cable connections much easier to install.
Retrorefl ectors
The retrorefl ector is a vital part of the system and choosing the correct one is necessary for the
correct operation of the system. Refer to page 3.2 for details on choosing a refl ector. For short
paths where refl ective tape is used, the tape can be attached to the back of an enclosure which
is fi tted to a tripod or placed on a wall in any convenient location. The angle of the tape can be
adjusted to give an adequate signal return provided this does not degrade the R
2 value.
Where retro • refl ectors are used on longer paths, these may be mounted in an enclosure
on a tripod, or the enclosure placed in any convenient location.
Purge air may be required for retros used in ducts. •
Where long paths are measured in metal buildings, the remote head may go out of •
alignment as a result of solar heating deforming the structure. The preferred solution
is to use multiple refl ectors. See pge 7.7
The • GasFinderFCr does not require any changes when different path lengths are
measured unless ppm values are needed, in which case the distance must be set and
an appropriate refl ector used.
Light Values
The type of refl ector used will depend on the path length, atmospheric conditions such as dust
or fog, and the type of laser. When choosing a refl ector, the prime concern should be to keep
the returning light level value between the preferred values of 4,000 and 8,000. The range
of the value is between 1000 and 16,368. Below 1000 the display will indicate “Low Light”.
There is no indication that the returning light has exceeded 16,368. When this happens the
receiver saturates and the displayed light value could read very low (<200). In this situation
the gas concentration readings will be in error and it is also possible to cause damage to the
optical components. The light value can be adjusted with the use of different refl ectors.
Note: Care should be taken to ensure that the returning light does not exceed 14,000.
GasFinderFCr
in enclosure
Cable connections at rear
of GasFinderFCr