Sea-Bird Scientific SBE 25plus, User Manual

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4.3 Prepare the 25plus for vertical or horizontal deployment
The Sealogger is typically deployed in a vertical
position. The manufacturer configures the pump
and plumbing at the time of purchase, but the
system can be changed as necessary.
Make sure to attach the pump and plumbing
correctly so that no air enters the pump. It
will not operate correctly if it traps air.
4.3.1 Vertical deployment
• The manufacturer-supplied tubing is Tygon
®
, with an inside diameter (ID) of 13 mm
and an outside diameter (OD) of 19 mm (½ x ¾ in).
• Make sure the pump exhaust is as far away as possible from the intake so that water
from the exhaust is not pulled into the temperature sensor intake: the pump make the
exhaust water warmer, which can result in incorrect temperature data.
• Attach a 13 mm section of 9.5 mm ID Tygon tubing at the DO sensor intake. Put a
13 mm ID section over the smaller tubing to make a tight seal.
• Make sure to attach the DO sensor intake as shown above, so that the exhaust has
no effect on operation.
• If the system does not have a SBE 43 DO sensor, connect the tubing from the
conductivity cell directly to the Y fitting.
Set up sensor and verify operation
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