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MAN0530 Issue 15 - 07/17
Searchline Excel
2104M0506
3. INSTALLATION AND OPERATION
ice on the windows in ambient temperatures down to approximately -20°C.
Below this temperature, snow or ice blown onto the window will not be melted until the ambient
temperature rises. If long-term, outdoor operation in very cold climates is intended, it is
recommended that extra shielding/covers are employed to prevent snow/ice from being blown
onto the windows and building up.
Note: The heated optics have not been evaluated as part of the performance testing relating
to the FM approval and therefore are not considered part of the performance approval.
Deluge and Flooding - Searchline Excel is rated IP66/67 and as such will not be damaged
by occasional deluge or flooding. However, during such instances the unit will completely lose
its IR signal and will enter the BEAM-BLOCK/FAULT state. Also, when the deluge/flooding
subsides, there is the possibility that contaminants will be left on the windows. Therefore, it
is recommended that Excel units be located away from areas particularly prone to deluge or
flooding.
Areas Prone to Subsidence and Settling - Where possible, it is recommended that Excel units
are not mounted on structures located where problems with subsidence, settling or thawing
of permafrost are known to cause significant movement. If such locations cannot be avoided,
the foundations of the mounting structure should be engineered to minimise any angular
movements.
Areas Prone to Earthquakes - In locations prone to earthquakes, there is a chance that during
or after an earthquake, the units of an Excel gas detector will become misaligned with respect
to each other. Provided that the Excel units do not suffer from direct mechanical impact damage
during an earthquake, they should remain undamaged by such events. Anti-vibration mounts are
unlikely to be of any benefit and are not recommended. After an earthquake it is recommended
that Excel gas detectors are visited and their alignment be checked.
Accidental Impact - Locations where there is a significant likelihood of equipment, personnel
or moving objects accidentally knocking Excel units out of alignment should where possible
be avoided. If such locations cannot be avoided, measures including improved mechanical
protection and warning notices should be considered.
Intense Electromagnetic Fields - Searchline Excel complies with EN61000-6-3 and EN61000-6-2
(to industrial levels) in addition to the stringent requirements laid out in DNVGL-CG-0339. As
such, the system is well protected from interference by electromagnetic fields. However,
locations in close proximity to radio/radar transmitters, heavy electrical plant and high voltage
power cables may experience field strengths in excess of those specified in EN61000-6-3 and
EN61000-6-2. Where possible, such locations should be avoided or units should be installed
as far as possible from the source of the electromagnetic field. Measures including additional
screening, filtering and transient suppression may also be of benefit in such locations.
3.2.3 Beam Path
The Transmitter and Receiver units windows should face each other across the area to be
protected and, depending on the range of the Transmitter in use, should be the following
distance apart:
15
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