MSS60
Microstructure Turbulence Profiler
The MSS60 is a multiparameter probe for measuring micro-scale water stratification as well as the intensity of small scale turbulence in water down to approx. 500 m, preferably in coastal water, rivers and lakes. The MSS60 can be equipped with up to 5 different sensors (7 different parameters) mounted at the bottom cap.
Description
The microstructure measuring system includes the MSS profiler, a special winch, a probe interface, and a data acquisition computer. The probe interface is connected to the PC (laptop or desktop) via USB port.
Standard sensor equipment
- Pressure transducer
- Temperature (PT100)*
- Conductivity
- 2 x Shear
- Fast temperature sensor (NTC)
- Acceleration (natural oscillation) – internal
* combined temperature and conductivity sensor
Microstructure investigation requires an undisturbed measuring procedure of the profiling instrument. Effects caused by cable tension (vibration) and the ship’s movement have to be eliminated by buoyancy driven free sinking of the MSS Profiler. This requires a loop in the cable next to the profiler. To maintain the loop sufficient cable has to be lowered into the water constantly. For vertical measurements, the profiler is balanced with a slightly negative buoyancy leading to a sinking velocity of 0,3 to 0,7 m/sec.
The profiler can be manually handled and recovered. For a more convenient operation, a special portable winch can be used. The acquired Data is transmitted via electrical cable to a board unit and then to a data acquisition PC. The on-board unit is equipped with a power supply for the profiler and a receiver of the data link. The data is stored on the hard disc of the acquisition PC during the measurement.
The basic hardware system for microstructure field measurements consists of four parts:
- microstructure profiler
- USB-Interface and power supply
- sea cable connection between interface and profiler
- PC, Laptop, or Notebook with USB interface
The measuring system can be powered either by 115 / 230 VAC (standard version), or 12 VDC battery (option).
For data acquisition the high speed Micro-Structure Data Acquisition program MSDA is used. MSDA displays the received data and stores it on hard disk. A graphical user interface guarantees an easy system operation.
Main features
- up to 5 sensors (7 parameters) + internal sensors
- non-corrosive titanium housing
- max. depth: 500 m
- 16 channels (more internal sensors possible)
- 1024 scans/s
- resolution: 16 bit
- baud rate: 614 kbit (via USB-Interface)
- easy data acquisition and evaluation software
Specifications
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General
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Application
Outdoor
Height [cm]
80
Diameter [mm]
60
Weight in air [kg]
6
Housing Material
Titanium
Max. operating depth [m]
500
Min Operating Temperature [degr]
-10
Max Operating Temperature [degr]
60
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Communication
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(Physical) Ports (USB, LAN, RS-232, etc.)
RS485
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Performance
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Sample rate
1024 sata sets / sec
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PH, Oxygen, Conductivity, Pressure, Temperature, Fluorescence, Turbidity
-
Conductivity Accuracy [mS/cm]
0.002
Conductivity Measurement Range [mS/cm]
70
Conductivity resolution [mS/cm]
0.0002
Dissolved Oxygen Accuracy
± 2 % sat.
Dissolved Oxygen Range
0 - 250% sat.
Dissolved Oxygen Resolution
0,01 % sat.
Pressure Initial Accuracy
up to 0.05 % full scale
Pressure Range
up to 50 bar
Pressure Resolution
0.002 %
Temperature Range
-2 - 36 °C
Temperature Accuracy
± 0.002 °C
Temperature Resolution
0.002 %
