Sequoia LISST-200X, Руководство пользователя

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LISST-200X Operation Details 74 LISST-
200X User’s Manual
G.
Instrument Mounting, Deployment Orientation,
Storage and Maintenance
Horizontal
Mounting The LISST-200X measures scattered light to obtain particle size
distributions. Therefore, it is important to keep particles from sticking
to the window surface. The first line of defense it to keep the window
surface vertical by mounting the instrument horizontally. This is most
critical when the water motion is slow. When working in rivers or in a
towed or profiling application the orientation is not as critical.
The center section of the main pressure case has a slightly smaller
diameter than the ends. The smaller diameter section is the
suggested mounting area. The U-shaped mounting block provided
with the instrument fit this diameter and can be used for mounting the
instrument. The clamps supplied with the instrument can also be
used.
Spare clamps for mounting the instrument are available from
Sequoia.
Electrical
Isolation To reduce the corrosion of the aluminum parts, a zinc anode is
attached to the connector endcap. This anode must be exposed to
the water for it to be effective.
When mounting the instrument be sure to electrically isolate the
instrument from all other metal. Any contact with other metal can
greatly increase the rate of corrosion. Isolate the instrument with
rubber or plastic to keep the LISST-200X from being the sacrificial
anode for the mounting hardware. Failure to properly isolate the
instrument from all other metal will void the warranty.
A set of stainless steel clamps with rubberized interiors ships as part
of the instrument package. Use these or the plastic clamps for
mounting, and make sure that no metal is in direct contact with the
pressure housing or other components of the instrument. If you lose
the spare clamps, replacement clamps are available for purchase
from Sequoia.
Cleaning the
Optical Windows The condition of the windows is critical to the performance of the
LISST-200X. Care must be taken when cleaning the windows. The
windows and the instrument should be rinsed thoroughly with fresh
water after each deployment. The windows should be cleaned with a
soft cloth or lens tissue. Liquid detergent/soap and water may be
used. For removing grease spots, finger prints, etc., alcohol may be
used. Do not use stronger solvents such as Acetone or Toluene.