NKE STBD-PR User manual

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PAGE 1/18

USER MANUAL

STBD-PR

Rev 5

Document reference : STBD-33-30-065_UTI_UK.doc

Document applicable to product(s) : STBD-PR station and profileur

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SOMMAIRE

1. INTRODUCTION ..........................................................................................................................................................3

2. PHOTO............................................................................................................................................................................4

3. CHARACTERISTICS ...................................................................................................................................................5

3.1 DATA LOGGER CHARACTERISTICS .............................................................................................................................5

3.2 CHARACTERISTICS OF THE MEASUREMENT................................................................................................................5

3.2.1 Turbidity channel..............................................................................................................................................5

3.2.2 Selection of Turbidity measurement range .......................................................................................................5

3.2.3 Temperature channel........................................................................................................................................6

3.2.4 Pressure or depth channel ................................................................................................................................6

4. IMPLEMENTATION....................................................................................................................................................7

4.1 RADIO STBD-PR TIME SETTING................................................................................................................................8

4.2 PRESENTATION OF THE CONCENTRATOR: ............................................................................................................8

5. ADJUSTMENT & MAINTENANCE PROCEDURES...............................................................................................9

5.1 PRESSURE SENSOR.....................................................................................................................................................9

5.2 DEPTH ZERO DRIFT CORRECTION ...............................................................................................................................9

5.3 ADJUSTMENT TEMPERATURE ..................................................................................................................................10

5.4 TURBIDITY SENSOR..................................................................................................................................................11

5.4.1 Adjustment ......................................................................................................................................................11

6. TECHNICAL CHACTERISTICS..............................................................................................................................13

6.1 MECHANICAL CHARACTERISTICS.............................................................................................................................13

6.2 SPECIFICATIONS OF RADIO TRANSMISSION..............................................................................................................13

6.3 MEMORY AUTONOMY...............................................................................................................................................13

6.3.1 STBD-PR in recording mode at 3 seconds (Production of a profile)..............................................................13

6.3.2 STBD-PR in recording mode at 1 minute (Short term monitoring) ................................................................13

6.3.3 STBD-PR in recording mode at 10 minutes (Long term monitoring) .............................................................13

6.4 ENERGY AUTONOMY................................................................................................................................................14

6.4.1 as data-logger.................................................................................................................................................14

6.4.2 used with RECOPESCA..................................................................................................................................15

6.4.3 Estimate by the Winmemo II software.............................................................................................................15

7. OPTIONNAL USE OF AN AUTONOMOUS BRUSH.............................................................................................16

7.1 SPECIFICATIONS.......................................................................................................................................................17

7.1.1 Assembly .........................................................................................................................................................17

8. INSTALLATION OF RUBBER PROTECTIONS....................................................................................................18

8.1 STBD-PR POSITIONING FOR RADIO OPERATION ......................................................................................................18

9. MECHANICAL LAYOUT..........................................................................................................................................18

10. END OF LIFE...........................................................................................................................................................18

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1. INTRODUCTION

The STBD-PR probe allows the measurement and recording of pressure, temperature and turbidity (or

concentration of suspended particles). The probe is optimized for profile measurements and its Turbidity

channel has an automatic range selection.

This probe consists of a Seapoint sensor that emits light modulated at 880 nm. The light reflected by particles

(backscatter) is detected by a cell that provides a signal proportional to the concentration of suspended particles

in the medium to be measured.

The setup and reading are carried out without opening the housing, using an Inductive or Radio Data Pencil

connected to the USB port of a PC computer.

All the command functions are available in the Winmemo II software provided with the Data Pencil Kit.

Used with RECOPESCA (automated data acquisition network on-board ships), the STBD-PR automatically

transmits its data to a CONCENTRATOR via a radio link.

Applications:

Suspended biomass, visibility, pollution, sediment transport, particle profile.

Equipment required for the use of an STBD-PR:

-1 Data Pencil, reading interface at 57,600 bauds

-1 PC computer.

-The Winmemo II software.

The turbidity sensor is protected by a cover that is screwed onto the body of the STBD-PR. A thread start

located on the protective cover and the body of the STBD-PR allows this protective cover to be correctly

oriented so as to avoid distorting the turbidity measurement.

A rubber protection can be added as an option to protect the entire probe.

If the protective cover of the turbidity sensor breaks, the STBD-PR must be returned to the factory to

replace the cover + sensor bracket assembly, WHICH MUST BE PAIRED.

To ensure the good operation of the STBD-PR, a gap of 11cm must be left in front of the field of view of

the turbidity sensor.

Pressure sensor

Turbidity sensor

Temperature sensor

Holding screws of the

protective cover

Position of the radio

transmission/reception antenna.

This side of the STBD-PR must be

free of any metal obstruction to

ensure good radio communication.

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2. PHOTO

Turbidity sensor Seapoint

Temperature sensor

Pressure sensor

Protective cover

Shoulders for attaching

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3. CHARACTERISTICS

3.1 DATA LOGGER CHARACTERISTICS

Measurement frequency: Programmable from 1s to 99hrs

Clock drift: 1min / month

Memory size: 1Mb with data compression.

PC interface: Radio transmission

Operating temperature: -5°C / +35°C

3.2 CHARACTERISTICS OF THE MEASUREMENT

3.2.1 Turbidity channel

Sensor: Seapoint STM probe

Ranges: 25 NTU, 125 NTU or 750 NTU: choice between manual and automatic range.

Turbidity range (NTU)

Linearity

Resolution (NTU)

0 – 25

< 5%

< 0.007

0 – 125

< 5%

< 0.035

0 – 750

(Non linear from 750 to 2000)

< 5%

(0 to 750 NTU)

< 0.5

(0 to 750 NTU)

Automatic

As per range

3.2.2 Selection of Turbidity measurement range

The measurement range of the Turbidity channel may be forced by the user (choice between the 3 ranges) or

configured in "automatic" mode.

In "automatic" mode, the probe selects the best range to maximize the accuracy of measurement. The algorithm

that allows automatic range selection carries out 1 to 3 measurements to determine the optimum range.

The duration of each measurement, with no range change, is 1s.

The duration of each measurement, with 1 or 2 range changes, is shown in the table below.

Turbidity value to be

measured

Previous turbidity range

0 – 25 NTU

0 – 125 NTU

0 – 750 NTU

MEAS < 22 NTU

22 NTU < MEAS < 110 NTU

MEAS > 750 NTU

Range selection is done by configuring channel 2 according to the table below:

A range change may result in a start of block (This corresponds to a On/Off) being created in the

measurement file. This start of block implies a new dating for the measurements. This is achieved when the

programmed measurement frequency is less than the time required for processing. New dating of the

measurements takes place when the programmed frequency is 1 or 2 seconds and there has been a range

change in the measurement cycle.

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For the choice of turbidity measurement range, the Winmemo II software must be configured in EXPERT

mode.

3.2.3 Temperature channel

Sensor: Thermistor

Measurement range: -5°C / +35°C

Maximum resolution: 11m°C at 0°C, 13m°C at 10°C, 20m°C at 20°C

Accuracy: 50m°C in the range 0°C/20°C

Reponse time STBD-PR : < 0.5s at 63%

Reponse time STBD-PR : < 2s at 63%

3.2.4 Pressure or depth channel

Pressure sensor Piezoresistive with 0.2% accuracy and resolution below 0.02%or

Type of product:

Depth range

Accuracy

Max. resolution

STBD300-PR

0 – 300m

0.6 m

9 cm

STBD1200-PR

0 – 1200m

2.4 m

0.35 m

Canal

Gamme de

turbidité

0 – 25 NTU

0 – 125 NTU

0 – 750 NTU

Automatique

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4. IMPLEMENTATION

The parameter setting and reading of the STBD-PR data logger are performed without opening the housing

using the Data Pencil connected to the USB link of a PC computer.

All the control functions are available in the Winmemo II software.

Note: communication with the Radio STBD-PR can only take place above water.

When editing the configuration with the Winmemo II software, a “Radio” button allows to edit the parameters

specific to radio communication. They are accessible only if the Winmemo II software is configured in EXPERT

mode.

-Address of the data logger: Parameter that specifies the radio address of the data logger, (unique factory-

defined address for each product). The Radio Data Pencil uses this address to communicate with the

STBD-PR data logger.

-Address of the Concentrator: Parameter that specifies the radio address of a Concentrator with which the

STBD-PR can automatically communicate.

-Time interval between two transmissions to the Concentrator: Parameter that specifies the rate of

transmission of the STBD-PR measurements to the Concentrator.

-Minimum depth for radio transmission: Radio communication does not work when the STBD-PR is

immersed. This Parameter specifies the immersion depth beyond which the STBD-PR no longer attempts to

communicate with the Concentrator.

The Concentrator's Address and the Time Interval between two transmissions to the

concentrator must be set at 0 in case the STBD-PR does not communicate with the Concentrator.

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4.1 RADIO STBD-PR TIME SETTING

All the data loggers assigned to a Concentrator date their measurements based on one single reference: the

Concentrator.

For that, the Concentrator is synchronised with Universal Time UT thanks to its GPS.

The STBD-PR automatically synchronises itself with the time of the Concentrator at each transfer of

measurements.

4.2 PRESENTATION OF THE CONCENTRATOR:

Designed to be installed on board a boat, it receives the measurement files transmitted by data loggers such as

the STBD-PR via the radio connection.

It also enables the logging of GPS positions (Geodetic positions).

The data collected are temporarily stored in the Concentrator’s memory, before they are transmitted by GPRS

modem, via an email, to the processing station.

In order to avoid time lag with the first measurements (i.e. before the first transmission with the

Concentrator), time setting of the STBD-PR using the Winmemo II software must be done by first setting the

clock of the PC at universal time UT.

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5. ADJUSTMENT & MAINTENANCE PROCEDURES

In order to set the probe, the Winmemo II software must be configured in EXPERT mode ("Tools" tab in

Winmemo II).

5.1 PRESSURE SENSOR

The piezoresistive pressure sensor used on the SAMBAT requires no particular maintenance.

Simply follow these guidelines to preserve its service life:

- Maintain a sufficient amount of silicone grease in the pressure sensor port. To do so, put a "dab" of

silicone grease on your finger and fill the orifice.

- Never insert any objects in the pressure sensor port!

5.2 DEPTH ZERO DRIFT CORRECTION

In case of zero drift channel 0 (depth or pressure) it is possible to correct the adjustment details:

- Login to probe Winmemo II and switch to "Expert" mode.

- Make a "reading real time" and meet the physical value (P2) depth measured by SAMBAT at atmospheric

pressure.

- Make a "Play Panel" and select Channel 0 in the "channels" configuration tab.

- Raise the calibration coordinates example:

-Vcan0 point(s) of the converter correspond to the physical value P0.

-Vcan1 point(s) of the converter correspond to the physical value P1.

- Replace:

-P0 by the value of (P0 – P2)

-P1 by the value of (P1 – P2)

- - Save these values in SAMBAT with "total Initialize" function, and check with "Real-time reading" function

that the displayed depth at atmospheric pressure is 0.

The pressure or depth channel is compensated by a value of atmospheric pressure.

The aim is for every probe to be able to measure the same pressure (or depth) despite being set to a

different atmospheric pressure.

In order to achieve this, the physical values of adjustments are reduced to the reference atmospheric

pressure of 1013 hPa (or 1013 mbar) during calibration.

To know the absolute depth (which takes into account atmospheric pressure), the difference between

the actual atmospheric pressure and the reference value (1013 hPa) must be calculated.

The result must therefore be added to or subtracted from the depth values measured

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5.3 ADJUSTMENT TEMPERATURE

- Select maximum resolution, i.e. 12 bits, for the temperature channel (Way 0 – Channel 0).

- Set the probe in recording mode at a 1 second frequency and successively immerse it for 10 minutes in

2 baths with different temperatures:

- One bath at low temperature (+5°C).

- One bath at high temperature (+25°C).

- During these recordings measure the temperature using a reference thermometer:

- Note TX low temperature of the bath,

- Note TY high temperature of the bath.

- The temperature of the bath must be constant throughout the recording (thermostatic bath

recommended).

- Read the STBD once again and save the measurements to a file.

- Display the temperature curve and record the raw value measured for each bath. This is the value in

brackets that follows the Channel’s indication. Example: V0(X).

-XCAN (pts) value read at low temperature.

-YCAN (pts) value read at high temperature.

Edit the Calibration parameters of Channel 0 and modify as follows:

-Xpoint(s) of the converter correspond to the physical value TX.

-Ypoint(s) of the converter correspond to the physical value TY.

Display the temperature curve once more, and check the temperatures of the different baths.

Edit the setting parameters of Channel 0 and transfer the new Calibration coordinates (X,TX,Yand TY) to

the SP2T using the button "Total initalization".

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