Spectrex Series 300 Open-Path Gas Detection System - Manual (Page 38)

Spectrex Inc. - SafEye TM 300 Gas Detector Manual – TM 794100, Rev. D, May 2004
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5.5.2 Duct Alignment Set (Figure 12) and Accessories
Air Duct Installation has a limitation, which is the disability of viewing the
Detector’s front and performing fine alignment through detector aiming such as
performed in standard installation. As a result, fine alignment of the Detector’s
Mount should be performed before the detector assembly is mounted to it.
The Alignment Set solves this problem by enabling the installer to align the
Detector Mount first, and then to install the Detector. The Alignment Set includes
a Mount that is identical to the Detector Mount Surface and a telescope that is
installed in the middle of the Mount Surface. The Telescope is centered in the
Duct mount in a way that it is located in the same optical axis as the detector that
will be mounted later in the same location.
The Accessories supplied with the kit includes one No.10 Key for installation and
for alignment. One Accessories Set is supplied for each installation.
5.5.3 Duct Installation - Surface Preparation (Figure 9)
The following instructions are applicable for both the Light Source unit and the
Detector unit.
1. Check the Air Duct Installation Surface (1) stability. It should be as near as
possible to a rigid girder connection in order to assure proper support to
the mounting and the unit. Also the surface must be stable and free of
vibrations.
2. Locate the best installation surface for the Detector/ Light Source. The
location of the central point of each Duct Hole (3) should be at the same
distance from the surface edge. This will provide that both Detector and
Source optical axis will be in parallel to the Air Duct wall lines such that
any blocking in the interior area will be prevented.
3. Preparation of the surface: Prior to hole drilling, it should be verified that
the Installation surface is straight, clean and free of corrosion.
Drilling and cutting: Mark the Location and dimensions of the Installation
Figure 9 show surface drilling dimensions. Drill the Duct Hole (3) and the Screw
Holes (2) carefully.
Caution!
Since the installation is done in a potentially explosive, any
workmanship in the installation area should be performed under
the appropriate rules and regulations.