Instrument Description for DY033 Titanium Frame CTD
CTD Unit and Auxiliary Sensors
The CTD unit comprised a Sea-Bird Electronics (SBE) 9 plus underwater unit, an SBE 11 plus deck unit, a NOC-S titanium frame 24-way frame and 24 10 L OTE Water Samplers; all of which were mounted on a stainless steel 24-way CTD frame. Attached to the CTD were two SBE 3P temperature sensors, two SBE 4C conductivity sensors, one Paroscientific Digiquartz pressure sensor, one SBE 43 dissolved oxygen sensor, two CTD 2-π Underwater PAR sensors, one WETLabs BBRTD light scattering sensor, one Benthos 916T altimeter one CTG Aquatracka MKIII fluorometer, one WETLabs C-Star CTG Aquatracka MKIII transmissometer and one Workhorse Monitor 300 Khz LADCP..
The CTD hit the the seabed on cast 014 which introduced a large offset into the data recorded by the primary conductivity sensor. This sensor was replaced before cast 021. The PAR sensor was removed for some of the deeper casts as it was only depth rated to 500 m.
| Sensor unit | Model | Serial number | Full specification | Calibration dates (YYYY/MM/DD) | Comments |
|---|---|---|---|---|---|
| CTD underwater unit | SBE 9 plus | 09P-77801-1182 (Ti) | SBE 9 plus | 2014-03-12 | - |
| CTD deck unit | SBE 11 plus | 11P-34173-0676 | - | 2015-01-06 | - |
| Carousel | NOCS Stainless steel 24-way frame | SBE CTD TITA1 | - | - | - |
| Pressure sensor | Paroscientific Digiquartz | 129735 | Paroscientific Digiquartz | 2014-03-12 | - |
| Temperature sensor | SBE 3P | 3P-5700(Ti) | SBE 03P | 2015-01-23 | - |
| Temperature sensor | SBE 3P | 3P-5785 (Ti) | - | 2015-01-23 | - |
| Conductivity senor | SBE 4C | 4C-4138 (Ti) | SBE 04C | 2015-01-22 | Attached until cast 019. |
| Conductivity sensor | SBE 4C | 4C-2571 (Ti) | - | 2015-06-12 | Attached from cast 021. |
| Conductivity sensor | SBE 4C | 4C-4143 (Ti) | - | 2015-01-22 | - |
| Dissolved oxygen sensor | SBE 43 | 43-2055 | SBE 43 | 2015-09-15 | - |
| Altimeter | Benthos PSA 916T | 62679 | Benthos Altimeter | - | - |
| Irradiance sensor (DWIRR) | CTG 2-π PAR | 02 (Ti) | CTG 2-π PAR | 2013-05-07 | Measuring downwelling irradiance |
| Irradiance sensor (UWIRR) | CTG 2-π PAR | 04 (Ti) | - | 2013-11-21 | Measuring upwelling irradiance |
| Light scattering sensor | WETLabs BBRTD | BBRTD-758R | WETLabs BBRTD | 2013-06-03 | - |
| Fluorometer | Chelsea MKIII Aquatracka | 088244 | Chelsea MKII Aquatracka | 2015-01-21 | - |
| Transmissometer | WETLabs C-Star CTG Aquatracka MKIII | 1718TR | C-Star transmissometer | 2015-04-15 | - |
| LADCP | Teledyne Workhorse Monitor 300 Khz LADCP | 13399 | Workhorse Monitor LADCP | - | - |
