IMPORTANT SAFETY NOTES
CAUTION
The wiring procedures in this manual are intended
to ensure proper functioning of the system under
normal conditions. However, because of the many
variations in wiring codes and regulations, total
compliance to these ordinances cannot be guaran-
teed. Be certain that all wiring complies with the
NEC as well as all local ordinances. If in doubt,
consult the authority having jurisdiction before
wiring the system. Installation must be done by a
properly trained person.
CAUTION
This product has been tested and approved for use
in hazardous areas. However, it must be properly
installed and used only under the conditions speci-
fied within this manual and the specific approval
certificates. Any device modification, improper
installation, or use in a faulty or incomplete config-
uration will render warranty and product certifica-
tions invalid.
CAUTION
The system contains no user serviceable internal
components. Service or repair should never be
attempted by the user. Device repair should be
performed only by the manufacturer or trained ser-
vice personnel.
LIABILITIES
The manufacturer’s warranty for this product is
void, and all liability for proper function of the sys-
tem is irrevocably transferred to the owner or oper-
ator in the event that the device is serviced or
repaired by personnel not employed or authorized
by Detector Electronics Corporation, or if the sys-
tem is used in a manner not conforming to its
intended use.
CAUTION
Observe precautions for handling electrostatic sen-
sitive devices.
NOTE
The Open Path Eclipse is intended for detection of
hydrocarbon vapors only. The device will not
detect hydrogen gas.
INSTALLATION
IDENTIFICATION OF VAPOR(S) TO BE DETECTED
It is necessary to identify the flammable vapor(s) of
interest at the job site in order to determine the proper
calibration gas setting for Open Path Eclipse. In addi-
tion, the physical and fire hazard properties of the
vapor, such as vapor density and flashpoint should be
identified and used to assist in selecting the optimum
detector mounting locations within the area. The detec-
tor must be installed by qualified personnel only, follow-
ing local electrical equipment installation practices.
SYSTEM LOCATION CONSIDERATIONS
The OPECL system is designed for installation in haz-
ardous industrial areas. Each module is normally
installed using a solid vertical steel post or flat surface
mounting adapter to support the weight of the module.
The modules must be strategically located so that the
hydrocarbon vapor(s) to be detected will intersect the
light beam generated by the transmitter module.
Dispersion characteristics and behavior of the vapor
cloud resulting from a gas leak can be difficult to esti-
mate due to the significant number of variables that
exist at different applications. Identification of expected
gas leakage source(s), leak scenario identification, and
onsite leak simulation are the steps generally recom-
mended to provide the most accurate means of identify-
ing optimum system installation locations.
In all cases, the beam path and surrounding area
should be kept free of obstructions that could block the
infrared beam or hinder the free movement of air within
the area. A clear beam path of 20 CM diameter or
greater is recommended. The system is immune to the
effects of exposure to both direct and reflected sunlight.
Avoid installation in areas with obstructions such as
steam vents and plumes, smoke stacks and chimneys,
walkways and personnel areas, splash and sprayed
water, parking, loading, cranes, vehicle-related areas
such as bus stops, road junctions, and vegetation such
as trees, shrubs, etc.
7 95-85561.1
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