Plug the ends of the conductivity cell to prevent the cleaning solution from getting into the cell. Then soak the entire instrument in white vinegar for a few minutes. After scraping off the barnacles and marine growth, rinse the instrument well with fresh...
Field Procedures & Deployment
Why is Teflon tape used?
Adhesive Teflon tape (actually, UHMW tape — Ultra High Molecular Weight polyethylene) provides insulation to prevent damage due to contact of dissimilar metals. It is typically used by Sea-Bird on the inside of hose clamps used for mounting instruments, where U-bolts...
When I compute sigma-density values, why are they sometimes negative?
For convenience while examining differences in density between two water parcels, Sigma-density values are typically used by oceanographers. Sigma-density values allow the oceanographer to focus on the last 6 to 7 digits in the density value (when assuming 5 decimal...
Can I use a pressure sensor above its rated pressure?
Digiquartz pressure sensors are used in the SBE 9plus, 53, and 54. The SBE 16plus V2, 16plus-IM V2, 19plus V2, and 26plus can be equipped with either a Druck pressure sensor or a Digiquartz pressure sensor. All other instruments that include pressure use a Druck...
What are the recommended practices for splicing cables?
Sea-Bird typically recommends using the Dam/Blok and EverGrip products from PMI Industries. DamBlok makes the electrical splice and EverGrip provides the strain relief on the cable. See an example of how these products can be used.For a quick electrical...
What are the recommended practices for cleaning and lubricating winch cables?
This topic is covered in detail on the UNOLS (University-National Oceanographic Laboratory System) website; see http://www.unols.org/publications/winch_wire_handbook__3rd_ed/06_wire_rope_em_cable_lub.PDF.
Is it necessary to put my instrument in water to test it? Will I destroy the conductivity cell if I test it in air?
It is not necessary to put the instrument in water to test it. It will not hurt the conductivity cell to be in air.If there is a pump on the instrument, it should not be run for extended periods in air.Profiling instruments (SBE 9plus, 19, 19plus, 19plus V2, 25,...
What are the safety concerns/procedures if the instrument floods? Can the instrument explode?
While a CTD leak can result in a dangerous situation, it is not common. Pressure housings may flood under pressure due to dirty or damaged o-rings, or other failed seals, causing highly compressed air to be trapped inside. For example, a housing that floods at 5000...
What is the profiling depth range limitation, and where has the Thetis been tested?
Our current depth operating specification for the Thetis Profiler is in water columns ranging from 5 to 100m in depth. The Thetis Profiler has been most rigorously testing in 50 m offshore of Newport, OR, though other systems have been deployed in several other...
How will my CTD be affected by adjacent objects?
Sea-Bird’s CTDs are not directly affected by adjacent objects, unlike some CTDs that shift their calibration due to proximity effects. However, the CTD can only measure the water it sees. There are 2 concerns to keep in mind when mounting the CTD:If the CTD is...
Featured Posts
SBE 37 MicroCAT
The SBE 37 MicroCAT is a high-accuracy conductivity, temperature, and optional pressure recorder with an integrated Inductive Modem (IM) interface, internal batteries, memory, optional pump, and optional optical dissolved oxygen sensor. The MicroCAT is designed for...
Seattle Ocean Science & Technology Conference 2023
Sea-Bird Scientific is proud to partner with Sequoia Scientific in hosting the first Ocean Science & Technology Conference in Seattle, Washington on Thursday, September 14th. This conference will enable those in the Seattle area to network, connect, and discuss...
Seattle Ocean Science Mixer Recap
Sea-Bird Scientific was proud to host an Ocean Science Mixer and Networking Event in Seattle, Washington, on June 1, 2023 for World Oceans Day. Following our virtual webinar on Forging Your Career in Academia and Industry in partnership with The Oceanography Society...