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CTD - Conductivity Temperature Depth : CTD Plus
CTD - Conductivity Temperature Depth : CTD Plus : Description
Updated in mid-2004, the CTD Plus was originally launched in 1992 and has seen extensive use in varying conditions and applications around the globe. The instrument is a rugged, intelligent CTD designed for precision measurements of conductivity, temperature and depth. It is delivered ready-to-use, and includes an aluminum shipping case, 2m data / power pigtail, batteries, a sensor protection cage, a dummy plug, a maintenance kit, manuals and software.
In this configuration, the instrument includes a high-tech composite time-of-flight sound velocity sensor, enabling comparisons between calculated and directly measured sound velocity. This new approach to sound velocity sensor utilizes composite materials instead of stainless steel invar rods. Path-length change due to corrosion and vibration is eliminated, resulting in longer calibrations and less maintenance. Response to temperature change is immediate. Sensor range extends to 1600 m/s. On titanium or Delrin instruments, zincs are not required.
The pressure sensor accuracy is 0.05% and can be upgraded to 0.01%FS. The sampling rate has been increased to 25Hz. The aluminium housing provides strength and protection from knocks and shocks.
Like all Pluses, the new CTD Plus is designed for modularity. Any remote sensor purchased for use with the new Plus can be used with other Applied Microsystems Plus or Micro instruments. For example, a dissolved oxygen sensor originally purchased for vertical profiling use with a CTD Plus can be easily connected to an externally powered Micro CTD and deployed on AUVs, ROVs, or other platforms. Moreover, In the new Plus, remote sensors are no longer assigned to specific connectors on the instrument end-cap. Any analog (or digital or TTL) sensor can be plugged into any analog (or digital or TTL) connector, greatly simplifying field maintenance.
The new Plus comes standard with USB download capability to accelerate access to data once the instrument has been removed from water. Access to the USB port
CTD - Conductivity Temperature Depth : CTD Plus : Summary Information:
| Name: | CTD Plus | | Category: | CTD - Conductivity Temperature Depth | | Model: | Plus | Number: | n/a | | Description: | Updated in mid-2004, the CTD Plus was originally launched in 1992 and has seen extensive use in varying conditions and applications around the globe. The instrument is a rugged, intelligent CTD designed for precision measurements of conductivity, temperature and depth. It is delivered ready-to-use, and includes an aluminum shipping case, 2m data / power pigtail, batteries, a sensor protection cage, a dummy plug, a maintenance kit, manuals and software.
In this configuration, the instrument includes a high-tech composite time-of-flight sound velocity sensor, enabling comparisons between calculated and directly measured sound velocity. This new approach to sound velocity sensor utilizes composite materials instead of stainless steel invar rods. Path-length change due to corrosion and vibration is eliminated, resulting in longer calibrations and less maintenance. Response to temperature change is immediate. Sensor range extends to 1600 m/s. On titanium or Delrin instruments, zincs are not required.
The pressure sensor accuracy is 0.05% and can be upgraded to 0.01%FS. The sampling rate has been increased to 25Hz. The aluminium housing provides strength and protection from knocks and shocks.
Like all Pluses, the new CTD Plus is designed for modularity. Any remote sensor purchased for use with the new Plus can be used with other Applied Microsystems Plus or Micro instruments. For example, a dissolved oxygen sensor originally purchased for vertical profiling use with a CTD Plus can be easily connected to an externally powered Micro CTD and deployed on AUVs, ROVs, or other platforms. Moreover, In the new Plus, remote sensors are no longer assigned to specific connectors on the instrument end-cap. Any analog (or digital or TTL) sensor can be plugged into any analog (or digital or TTL) connector, greatly simplifying field maintenance.
The new Plus comes standard with USB download capability to accelerate access to data once the instrument has been removed from water. Access to the USB port | | Configuration: | Sound velocity sensor | | Application: | This version of the Plus is ideal for vertical profiles requiring high degrees of depth accuracy. The ability to determine sound velocity via direct measurement and via CTD calculation enables direct comparison between the two methods. | | Credibility Note: | n/a | | Case Study Link : | n/a | | Price: | Consult factory |
CTD - Conductivity Temperature Depth : CTD Plus : Usage Information:
| Int Description: | Plus - Profiler - Logger - 6061 | | Max Number Of Sensors: | 10 analog channels or 5 digital channels (NB: ability to integrate corresponding number of sensors a function of cumulative power requirements and available mounting / connector space) | | Depth Rating: | 5000 | Housing Material: | 6061-T6 Aluminum | | Weight Air: | 9 | | Weight Water: | 3.5 | | Length: | 566 (length of pressure housing from retainer ring / fender to sensor end cap) OR 881 from end to end (including sensors, shackle, etc.) | | Diameter: | 100 | | Power Source : | Battery / External | | Housing Notes: | Dimensions and weight do not include any additional remote sensors that might be added to the configuration.
In this configuration of the Plus, a USB connector for high-speed data download capability is included as a standard.
The standard connector is a Subconn Micro 8 wet pluggable connector. Other connector choices can be accommodated, if desired. |
CTD - Conductivity Temperature Depth : CTD Plus : Sensor Information:
| Name: | Conductivity | | Manufacturer: | Applied Microsystems | | Type: | Conductive | Model: | n/a | | Accuracy: | 0.01 mS/cm; 0.005 mS/cm precision | | Range: | 0 - 7 S/m or 0 - 70 mS/cm | | Response Time: | 25ms @ 1m/s | | Max. Frequency: | 25Hz | | Maximum Depth(m): | 6000m | | Resolution: | 0.0015 mS/cm | | Stability | n/a | | Location: | n/a | | Notes: | The Applied Microsystems conductivity sensor is short, with a length of just under 3 cm. Sensor length plays a critical role in determining resistance to the introduction of new flows into the sensor cavity, and hence response times. The equation for response time is as follows:
Response Time = (0.85 * Length of Sensor ) / Flow Speed.
Using the above, our conductivity sensor has a response time of 25 milliseconds in a 1.0 m/second flow environment and 255 milliseconds in a 0.1 m/second flow environment. Given the above, no pumps or flow tubes are required. |
| Name: | Pressure | | Manufacturer: | Keller | | Type: | Semiconductor bridge strain gauge | Model: | PA-10 | | Accuracy: | 0.15%FS | | Range: | Various to 6000 dbar | | Response Time: | 10ms | | Max. Frequency: | 25Hz | | Maximum Depth(m): | 6000m | | Resolution: | 0.005%FS | | Stability | n/a | | Location: | n/a | | Notes: | n/a |
| Name: | Temperature | | Manufacturer: | Applied Microsystems | | Type: | Thermistor | Model: | n/a | | Accuracy: | 0.005C | | Range: | -2 to 32C | | Response Time: | 100milliseconds | | Max. Frequency: | 25Hz on Plus & 8 Hz on Smart | | Maximum Depth(m): | 5000m | | Resolution: | 0.001C | | Stability | n/a | | Location: | n/a | | Notes: | n/a |
| Name: | Sound Velocity | | Manufacturer: | Applied Microsystems | | Type: | Time of flight - hi-tech composite materials | Model: | n/a | | Accuracy: | 0.05m/s; 0.03 m/s precision | | Range: | 1400 - 1600 m/s | | Response Time: | 47 microseconds | | Max. Frequency: | 25 Hz | | Maximum Depth(m): | 10000m | | Resolution: | 0.01m/s (displayed); 0.005 m/s (timing) | | Stability | n/a | | Location: | n/a | | Notes: | This new approach to sound velocity sensors utilizes high tech composites instead of traditional stainless steel invar rods. Path-length change due to corrosion and vibration is eliminated, resulting in longer calibrations and less maintenance. Zincs are not required.
Moreover, sensor length is only 3cm, resulting in increased ease of integration. Path-length variation due to temperature change is immediate, enabling more precise mapping of thermoclines
Like all AML sound velocity instruments, the Micro SV receives over 700 individual calibration points. Calibrations are not extrapolated to cover the entire operating range of the instrument. This distinction is important. Instruments with extrapolated calibrations may find themselves significantly out of spec at individual sound velocity speeds, while the instrument - as a whole - meets averaged accuracy requirements. |
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