User Manual
(for eMOLT Participants Deploying the SEABIRD SBE37sm  Microcat Temperature and Salinity Probe)
Version 1.6
18 March 2003

Battery Installation
Initializing & Deployment of the Probe
Recovery & Downloading Data
Taking Water Samples
Cleaning the Conductivity Cell
Who is responsible for what


This manual is meant to paraphrase the SEABIRD Inc instructions on using the SBE37sm probe.  It includes only those steps that are needed for eMOLT deployments.  If participants want to see SEABIRD's complete instructions, they are available as well in the form of a PDF document (assuming one has ADOBE Acrobat for reading).  It is assumed that participants have attended a one-day training session on the care and operation of these probes before reading this manual seriously. This will be the manual for that training session.
Battery Installation
Note: Participants may not ever need to do this installation and/or change the batterries. The instrument should already be loaded with fresh batteries for your first deployment. You will probably be returning the instrument for post-calibration and refurbishing on a near-annual basis. Fresh batteries will be part of the refurbishing procedure.

If you ever do need to change the batteries, follow SEABIRD User Manual Instructions for installing batteries (page 13, 14, and 15) with my additional notes as follows:

Initializing and Deployment of the Probe
  Recovery & Downloading Data Taking Water Samples
Water samples should be taken on a near-quarterly basis in order to validate the instruments performance. These samples will be sent  on a near-annual basis to Woods Hole (and then on to a lab in Narragansett RI)  to be read in a salinometer. This procedure is necessary to check for drift of the sensors and, in particular, bio-fouling of the conductivity sensor.

The length of line that came with the water sample uints was not sufficient for most of our deployments so the participant will needed to contact their association rep to resolve this problem (ie buy more nylon cord at local hardwares?).

Since it is not critical exactly when these samples are taken,  they are best done in flat calm slack tide conditions.

The procedure for sampling is taken from the water sampler webpage as follows:

 1. To set the trigger mechanisms, hold the sampler by the brass handle with triggers in the "up" position. Pull the cable attached to Plunger A outward and hook the loop over Trigger A. This will remove Plunger A from sampling chamber.

 2. After the loop is hooked over Trigger A, attach the other loop to Trigger B. This will remove Plunger B from sampling chamber.

 3. The water sampler is now cocked and ready to be lowered into the water sampler by the calibrated line until the desired depth is reached.

 4. While holding the brass messenger in one hand, steadily lower the water sampler by the calibrated line until the desired depth is reached.

 5. Hold the line in a vertical position over the sampler and release the messenger to travel down the graduated line. After the messenger trips the closing mechanism, the sample within the collection chamber is sealed from mixing with unsampled water.

       NOTE: A slight tug on the line after the messenger had been released signals the sampler has closed.

 6. Gradually pull the water sampler to the surface with the line and carefully rest sampler on level surface.

 7. Aliquots or portions of the sample are carefully taken by standing the water sampler upright on Plunger A and unclamping the outlet tubing. Partially remove Plunger B to prevent formation of a vacuum.

Note: each participant will be provided with several glass water bottles.

Cleaning/soaking the Conductivity Cell Who is responsible for what in the SEABIRD Microcat phase II deployments

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