Wet Labs ac-s, User Manual

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8 ac-s User’s Guide (ac-s) Revision F 9 Feb. 2006
misalignment if stress is applied unevenly to the upper and lower cans. Make sure the
unit is mounted on at least two points and that neither point is a stress point.
3. Make sure you have provided for an unobstructed upward flow through the flow
chambers and the pump ( Figure 2 ).
Figure 2.
Proper connection of ac-s flow tube
The following suggestions will help you obtain the highest quality data from your ac-s:
•
The instrument is extremely sensitive and should be handled carefully.
•
A sturdy shipping/transport container should be used to transport your instrument to
the field. The instruments are sturdy, but the optics can be jarred out of alignment
when subjected to shock.
•
The data will be adversely influenced by bubbles, dirt or grease in the flow path or
misalignment of the flow tubes. Make sure that the flow tubes, pump tubing and
screens are free of dirt and grease. Clean with ethanol or warm soapy water. Rinse
with clean tap or distilled water. Do not allow water to dry on the windows as this
will leave a residue that may be hard to remove.
•
Secure the ac-s to a sturdy cage or lowering frame that will protect the instrument from
striking the deck, ship’s side, or sea bed. Use a dielectric isolator (rubber sheeting or
thick tape) to isolate the instrument’s aluminum case from the steel cage.
•
When clamping the instrument to the cage, make certain no torsional stresses are
applied. Even slight wracking of the instrument can alter the beam alignment. This
will severely degrade the data quality, especially on the ‘c’ side, which requires an
extremely tight alignment tolerance.