BOREAL LASER GasFinder2, Руководство по эксплуатации, Страница: 13 / 74

2.1
Boreal Laser Inc. GasFinder2 Operation Manual — Pre Installation July 17th 2017
Section 2. Pre-Installation Checks
There are two confi gurations for mounting the GasFinder2 :
P • ortable Tripod Mount
F • ixed Mount
Portable Use on a Tripod
The ground or structure at the tripod base should be fi rm to minimise
movement and settling. Paths greater than 500m should be avoided
if measurements are required for more than a few hours.
Fixed Use on a Large Mount
Fixed mount locations should be chosen to limit paths to 750m
and be in areas that are safely accessible for installation and
maintenance. Locations with dust or steam are to be avoided if
possible. The
GasFinder2 can withstand small vibrations and
some translational motion but is extremely sensitive to rotational movement on long (>200m)
paths. The mounting must be rigid and well braced and kept separate from the structure used
to support personnel. Cables for power and data can be run in conduit or cable tray.
A site survey should be undertaken to check the following points:
Temperature limits • : the GasFinder2 should be located in an area where the
temperature does not go below *-20 0 C or above 40 0 C. A higher temperature can be
tolerated for a short time (1hr).
*Note that the lower limit for an HF system is +10
0
C.
Power supply • : the GasFinder2 operates from a regulated,12VDC, 2A supply. This can
be from a 12V battery or a power supply module which converts the local supply voltage
(110V/220VAC) to 12VDC.
Accessibility • : safe access to the rear of the GasFinder2 should be possible.
Path • : locations should be chosen such that a line of sight path to the proposed refl ector location
is unobstructed by traffi c, dust, steam and limited to a maximum length of 750m. Mounting
locations on paths greater than 100m where sun can strike directly on the mount may require
special measures to prevent movement due to differential solar heating on the mount.
Retrorefl ectors (Retros)
Retrorefl ector locations should be in areas that are safely
accessible for cleaning when necessary. Locations with dust or
steam are to be avoided. Steam may pose a problem if it is dense
and consistently crosses the path.
If the location is outside and the climate is humid, a rain hood and some
heating in the enclosure may be necessary to prevent condensation
on the window. This usually requires an outlet nearby to supply power
to a heater. The retros can tolerate small vibrations and movement,
so the retro mounting does not need to be as robust as the mounting
for the
GasFinder2 .
GasFinder2 mounted on
a tripod
Heater
Thermostat
Retros Retros