Discovery Cruise AMT15 CTD Instrumentation for the titanium frame
Two different CTD frames were used - a stainless steel frame and a titanium frame used for trace metal sampling. This document describes the instrumentation on the titanium frame.
Titanium
The CTD unit was a Sea-Bird Electronics 911 plus system, with dissolved oxygen sensor. The CTD was fitted with a transmissometer and a fluorometer. All instruments were attached to a Sea-Bird SBE 32 carousel (titanium). The table below lists more detailed information about the various sensors.
| Sensor | Model | Serial Number | Calibration | Comments |
|---|---|---|---|---|
| Pressure transducer | Digiquartz temperature compensated pressure sensor | 90074 | 13/02/2004 | - |
| Conductivity sensor 1 | SBE 4C | 2851 | 16/07/2004 | - |
| Conductivity sensor 2 | SBE 4C | 2858 | 16/07/2004 | - |
| Temperature sensor 1 | SBE 3P | 4381 | 16/07/2004 | - |
| Temperature sensor 2 | SBE 3P | 4380 | 16/07/2004 | - |
| Dissolved oxygen | SBE 43 | 43B-0363 | 06/02/2003 | - |
| Transmissometer | Chelsea MkII Alphatracka | 161047 | 29/04/2001 | 0.25 m path |
| Fluorometer | Chelsea MkIII Aquatracka | 88-2960-163 | 13/11/2002 | - |
| PAR sensor | Chelsea PAR sensor | 03 | 01/09/2004 | - |
| PAR sensor | Chelsea PAR sensor | 02 | 01/09/2004 | - |
| Light Scatter Sensor | Sea Tech Light Scatter Sensor | 338 | 16/04/1997 | - |
Change of sensors during cruise: Downwelling PAR sensor 03 replaced prior to CTD019 with sensor 04. Light scatter sensor 339 added to frame prior to cast CTD022.
Sampling device
Rosette sampling system equipped with 24 x 10 l trace metal free sampling bottles (manufactured by Ocean Test Equipment Inc.).
