Spectrex Series 300 Open-Path Gas Detection System - Manual (Page 31)

Spectrex Inc. - SafEye TM 300 Gas Detector Manual – TM 794100, Rev. D, May 2004
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5. Installation Instructions
The Detector and Light Source units can be installed and maintained with the use
of general-purpose common tools and equipment. The installation procedure has
to be performed by suitably qualified personnel.
5.1 Introduction
This section does not attempt to cover all of the standard practices and codes of
installation. Rather, it emphasizes specific points of consideration and provides
some general rules for suitably qualified personnel. Special safety precautions
are stressed wherever applicable.
5.2 General Considerations
5.2.1 Personnel
Only suitably qualified personnel, familiar with the local codes and practices,
trained for gas detection maintenance should be employed. Wiring should only
be performed or supervised by someone with knowledge of electronics and in
particular wiring installation.
5.2.2 Tools Required
The SafEye system requires the following tools:
•
Set of screwdrivers
•
Set of hex keys/Allan wrenches (supply with commissioning kit)
•
Voltage Multimeter
5.2.3 Site Requirements
The installation position of the SafEye system must take into account if the gas
being monitored is heavier or lighter than air, the prevailing wind directions and
the individual site requirements.
The site selected must give the Detector a direct view to the Source.
The mounting point for each item should be secure and stable with minimal
vibrations.
Equipment should be either mounted in a position where it cannot be knocked
out of alignment, or guarded from physical impact.
5.2.4 The Source and Detector
The appropriate Detector should be selected for the length of open path to be
monitored. To allow for ageing of the Source and a reduction of the IR signal due
to adverse weather, we recommend using a Detector that is not at the limit of its
operating range. As a guide, select a Detector that is installed at a distance from
the Source of not more than 75% of the specified operating distance. In severe
weather conditions such as offshore oil production and exploration, this should
be reduced to 50%.