Appendix D - Seapoint Turbidity Meter - idronaut Ocean Seven 304Plus Operator's Manual

APPENDIX D – SEAPOINT TURBIDITY METER
D.1 SEAPOINT OEM Turbidity Meter
The SEAPOINT OEM Turbidity Meter is a sensor that measures turbidity by detecting
scattered light from suspended particles in water. Its small size, very low power
consumption, high sensitivity, wide dynamic range and 6000-meter depth capability
allow this sensor to be used in most applications where turbidity or suspended particle
concentrations are to be measured. The sensor is also insensitive to ambient light when
underwater and has a very low temperature coefficient. The SEAPOINT Turbidity
Meter senses scattered light from a small volume within 5 centimetres of the sensor
windows. Confining the sensing volume allows the sensor to be calibrated in relatively
small water containers without errors from surface and wall reflections. It also allows
the sensor to be used in tight spaces such as crowded instrumentation packages, pipes
and shallow streams. Each sensor is factory calibrated using formazine Turbidity
Standard. The user may also calibrate the sensor with particles of interest to measure
their suspended concentrations. The SEAPOINT Turbidity Meter is constructed from
rugged, corrosion-free materials and quality surface mount electronic components for
durability and high reliability.
D.1.1 Characteristics
Range setting:
Output Time Constant:
Sensing Distance (from windows):
Linearity:
Gain Sensitivity (mV/FTU/NTU)
100x
20x
5x
1x
1x
Temperature Coefficient:
Operating Temperature:
Power Requirements:
Weight (dry):
D.2 CONFIGURATION
Through the CTD set-up, it is possible to configure the Turbidity Meter.
OCEAN SEVEN 304Plus
Id Name
01 Press
02 Temp
03 Cond
04 Sal
05 Turb
CMD:I)nitialize,M)odify,D)elete,Q)uit
IDRONAUT – Brugherio (MB)
Range (FTU/NTU)
200 0.03 ... 25
40 0.03 ...125
10 0.03 ...500
2 0.03 ...<750 **
2 0.03...<4000 ***
** output is non-linear above 750 FTU/NTU
*** output is non-linear above 1250 FTU/NTU
Please contact Idronaut to get the correct range.
< 0.05% / °C.
0°C to 65°C (32° F to 149° F).
7-20 VDC, 3.5 mA avg, 6 mA pk.
86 g (3.0 oz).
Code Mux Digits
0000 253 0002
0001 253 0003
0002 254 0003
0004 255 0003
0024 000 0001
OCEAN SEVEN 304Plus CTD
25, 125, 500, >750 FTU
0.1 sec
< 5 cm (approx.)
< 2% deviation 0-750 FTU/NTU.
Accuracy (FTU/NTU)
0.05
0.25
1
5
5
63
Resolution (FTU/NTU)
0.005
0.025
0.1
0.5
0.5
12-2015