idronaut Ocean Seven 304Plus, Руководство оператора

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SECTION ONE
–
SYSTEM DESCRIPTION
IDRONAUT – Brugherio (MB) OCEAN SEVEN 304 Plus CTD 12-2015
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1.12. SENSOR SPECIFICATION
The OS304 Plus CTD can be equipped with the following sensors to measure:
Parameter Range Accuracy Resolution Time Constant
Pressure 0..1000 dbar (1) 0.05 %F.S. 0.0015 % F.S. 50 ms
Temperature -5.. +35 °C 0.002 °C 0.0001 °C 50 ms
+35.. +45 °C 0.01 °C 0.0001 °C 50 ms (4)
Conductivity 0.. 90 mS/cm(*) 0.003 mS/cm 0.0003 mS/cm 50 ms (2)
Analogue 0..5000 mV 1 mV 0.1 mV 50 ms
(3)
(1) Other standard pressure transducers available have : 10, 40, 100, 200, 500, 2000, 4000, 7000 dbar ranges.
(2)At 1 m/second flow rate.
(3) Six analogue inputs available for future expansion.
(4) OS304
Plus – MI version, special extended measurement range.
(*) By reducing the range to 0..70 mS/cm, the resolution becomes 0.0002 mS/cm.
1.13. OPTIONAL SENSOR SPECIFICATIONS
The OCEAN SEVEN 304Plus CTD can be optionally equipped with the IDRONAUT Highly Accurate
Precise (0.01%) pressure transducer, the IDRONAUT OEM Turbidity Meter and the IDRONAUT
dissolved oxygen sensor.
Parameter Range Accuracy Resolution Time Constant
Pressure 0..7000 dbar 0.01% F.S. 0.002 % F.S. 50 ms
Oxygen 0.. 50 pm 0.1 ppm 0.01 ppm 3s (*)
0.. 500 % sat. 1 % sat. 0.1 %sat. 3s (*)
Turbidity Meter 0.03..750 FTU/NTU 5 FTU/NTU 0.5 FTU/NTU 0.1 s
0.03..500 FTU/NTU 1 FTU/NTU 0.1 FTU/NTU 0.1 s
0.03..125 FTU/NTU 0.25 FTU/NTU 0.025 FTU/NTU 0.1 s
0.03.. 25 FTU/NTU 0.05 FTU/NTU 0.005 FTU/NTU 0.1 s
(*) from nitrogen to air.
A detailed description of the optional sensors can be found in the dedicated appendices.
1.14. THE SENSORS
A short presentation of the standard IDRONAUT OCEAN SEVEN 304 Plus sensors follows.
1.14.1. The pressure sensor
The pressure sensor is a high quality strain gauge, centrally mounted on the CTD base, capable of
generating a linear signal output thus giving a resolution of 0.03% over the whole measuring range of
0 - 700 bar.
Type:
strain gauge.
Measurement range: 0..700 bar.
Accuracy: 0.05%FS.
Resolution 0.0015%FS.
Response time: 50 ms @1 m/s.
Measurement bridge resistance: @ 25°C 3500 Ω ± 20%.
Excitation current: 0.6 mA.
Insulation: @ 50 VCC 100 MΩ
Operating temperature: -30..100 °C
Sensor body: AISI 316 L.
Compensation: Automatic compensation for temperature variations. Not
compensated for the barometric pressure variations.
Life: unlimited.
Calibration: offset calibration in air.