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Satlantic Suna Скачать руководство пользователя страница 39

Deep SUNA Manual

For SUNA running firmware version 2.4 or later

4. Terminal Interface of the SUNA

4.2.6 Analog Output

The SUNA can work with analog input data acquisition systems, such as a Sea-Bird
CTD profiler, by using the optional analog output system. The analog interface allows
merging of nitrate data with other data recorded at the same time. A standard
application is to integrate the voltage signal into a CTD profiler's auxiliary port, providing
a profile of conductivity, temperature, and nitrate versus depth.

Generating Voltage and Current for a Nitrate Concentration

The SUNA generates analog voltage and current representations of the calculated
nitrate values. The voltage is generated using a precision 12-bit digital-to-analog
converter (DAC) and is in the range of 0.095 to 4.095 Volts. The current is generated
using a precision 16-bit DAC and is in the range of 4 to 20 mA.
The SUNA has two configuration values, DAC Minimum Nitrate and DAC Maximum
Nitrate, that correspond to the lower and upper bounds of the voltage and current
output. If the nitrate concentration is below the DAC Minimum, the output voltage and
current will be the minimum voltage or current. If the nitrate concentration is above the
DAC Maximum, the output voltage and current will be the maximum voltage or current.
Otherwise, the voltage and current are calculated via

V

=

V

min

+

V

max

−

V

min

DAC

max

−

DAC

min

⋅(

C

nitrate

−

DAC

min

)

and

I

=

I

min

+

I

max

−

I

min

DAC

max

−

DAC

min

⋅(

C

nitrate

−

DAC

min

)

,

where

C

nitrate

is the nitrate concentrations

DAC

min

is the nitrate concentration at minimum voltage and current

DAC

max

is the nitrate concentration at maximum voltage and current

V

is the generated voltage

V

min

is 0.095 V, the minimum voltage

V

max

is 4.095 V, the maximum voltage

I

is the generated current

I

min

is 4 mA, the minimum current

I

max

is 20 mA, the maximum current

The actual voltage or current may differ slightly from the theoretical values. See below

Copyright © 2013, Satlantic LP, All rights reserved

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Содержание Suna

Страница 1: ...on proprietary to Satlantic or to a third party to which Satlantic may have legal obligation to protect such information from unauthorized disclosure use or duplication Any disclosure use or duplicati...

Страница 2: ...ace 18 4 2 1 Status and Maintenance Commands 19 4 2 2 File Commands 20 4 2 3 Configuration Commands 21 4 2 4 Polled Mode Commands 35 4 2 5 APF Mode Commands 35 4 2 6 Analog Output 39 5 Configuration P...

Страница 3: ...mware Upgrade Using SUNACom 60 9 2 Firmware Upgrade Using the Terminal Interface 60 10 Troubleshooting 61 10 1 Sensor Is Not Responsive 61 10 2 Sensor Output Is Unexpected 62 11 Accessories 63 11 1 Fo...

Страница 4: ...ocol for single character APF commands 38 Table 17 Protocol for multiple character APF commands 39 Table 18 SUNA build variants 43 Table 19 Data acquisition configuration parameters by operating mode...

Страница 5: ...to integrated systems For this reason the complete firmware interface is specified in Section 4 Terminal Interface of the SUNA Explanations on how to start when working in this environment are found i...

Страница 6: ...providing a current of at least 1 A Serial Interface The SUNA communicates via serial port using the RS 232 protocol at 8 bit no parity 1 stop bit and no flow control The baud rate is factory set to 5...

Страница 7: ...ting Analog Output When analog output is available the sensor automatically generates output voltage and current The sensor generates an output voltage in the 0 to 4 096 V and an output current in the...

Страница 8: ...ate bromide and bisul de in the ocean Deep Sea Research I 49 2002 1291 1305 3 2 Specifications 3 2 1 Build Variants The SUNA housing is made from anodized aluminum The housing is designed to withstand...

Страница 9: ...tput Optional Internal data logging Optional 2 GB or larger solid state Scheduling Optional USB connectivity Optional Advanced processing APF interface and real time temperature salinity correction Po...

Страница 10: ...For SUNA running firmware version 2 4 or later 3 The SUNA Sensor Copyright 2013 Satlantic LP All rights reserved 10 Illustration 1 Drawing of Deep SUNA Illustration 2 Drawing of Deep SUNA with glider...

Страница 11: ...NA processor into a low power state with a consumption below 3 mA In fixed time operation and between periodic operation event power control is handed to a supervisor circuit which reduces power consu...

Страница 12: ...send an RS 232 compatible signal from the SUNA The relay option is specially designed for the APEX float interface Float battery voltage is applied to the VIN and GND pins continuously throughout a p...

Страница 13: ...normally at 10 mm optionally at 5 mm The optical path length influences the concentration measurement range covered by the sensor and the accuracy of the results Another factor is the type of calibrat...

Страница 14: ...nably distinguished Typically it is 10 times the standard deviation of the blank nitrate concentration Table 9 Limit of Detection and Limit of Quantification Processing configuration Freshwater or Sea...

Страница 15: ...027 0 1 0 1 PPHA 42 0 003 0 01 0 1 An interfering species generates a spurious nitrate concentration when the spectral characteristics of the interfering species resembles that of nitrate Typically an...

Страница 16: ...e measured absorbance is decomposed Thus in freshwater deployments the number of concentrations to be fitted should be set to 1 High absorbance conditions introduce inaccuracies into the nitrate conce...

Страница 17: ...temperature Thus the reference baseline spectrum is ideally collected under conditions that mimic deployment conditions If deployment temperatures are expected to vary by more than 10 C a temperature...

Страница 18: ...sensor to the command line The command line reports via the SUNA prompt that it is ready to receive commands Command Interface to Data Acquisition The command line is terminated via the exit or the r...

Страница 19: ...e output line of that component is terminated by an exclamation mark making it easier to locate the problem Get Clock and Set Clock The get clock command outputs the time of the internal sensor clock...

Страница 20: ...d to see if the sensor has an internal file system and if so the space that is available File types are CAL for calibration files LOG for system log message files and DATA for files containing logged...

Страница 21: ...length values Build Configuration All build parameters are for information only and cannot be modified Sensor Type The Sensor Type is SUNA Sensor Version The Sensor Version is V2 Serial Number The Ser...

Страница 22: ...o reconnect the relay SDI 12 Interface The SDI 12 interface is Missing The SDI 12 interface is not available on a Deep SUNA Analog Output The analog output system is either Available or Missing Sensor...

Страница 23: ...gured and provided for troubleshooting Spectrometer Serial Number The spectrometer serial number is factory configured Lamp Serial Number The lamp serial number is factory configured Lamp Use Power Th...

Страница 24: ...rd Internal Data Logging Available Missing intdatlg APF Interface Available Missing apfiface Scheduling Available Missing schdling Optical Path Length 10mm pathlgth Integrated Wiper Missing intwiper E...

Страница 25: ...vely For reprocessing of data Full_ASCII or Full_Binary frames are necessary Reduced binary and APF frames allow reprocessing for seawater deployments APF frames only allow reprocessing of data that w...

Страница 26: ...les with a high frequency of acquisition events e g multiple events per hour over an extended deployment duration the total number of files can reach tens of thousands of files Such a number of files...

Страница 27: ...50 217 wdat_low Data wavelength high nm 210 350 250 wdat_hgh For the setrange command use wdatboth SDI 12 Address 48 57 ascii characters 0 9 48 ascii 0 sdi12add Data Acquisition Configuration Operatio...

Страница 28: ...countdown is measured in units of seconds and initially set to 15 The countdown is used in Continuous and Fixedtime operation modes Fixed Time Duration The fixed time duration is measured in units of...

Страница 29: ...f a second After the lamp has ignited a short time is required to stabilize the lamp output Typically lamps can be used 500 ms after being switched on This parameter is provided to adjust the stabiliz...

Страница 30: ...Another advantage of internal averaging is the reduction in the amount of data generated Dark Samples and Light Samples These parameters are used when Operation Control is set to Samples Dark and lig...

Страница 31: ...m 15m 20m 30m 1h 2h 3h 4h 6h 8h 12h 24h 1h perdival Periodic Offset s any value 0 perdoffs Periodic Duration s 0 255 10 perddura Periodic Samples 0 255 10 perdsmpl Polled Timeout s 0 65535 10 polltout...

Страница 32: ...s were available However there is currently no need to change the baseline order Dark Correction Method The dark correction method is one of SpecAverage or SWAverage The purpose of dark correction is...

Страница 33: ...ing Setting the cutoff to the maximum value of 10 0 will guarantee that all channels will be included in processing Integration Time Adjustment Integration time adjustment can be Off On or Persistent...

Страница 34: ...intprfac Integration Time Step 1 20 20 intadstp Integration Time Max 1 20 20 intadmax The processing configuration parameters completely determine how the spectrum is processed Some of the parameters...

Страница 35: ...ge LampTemp SpecTemp enter command line Sleep enter low power standby 4 2 5 APF Mode Commands In APF mode the nitrate sensor is normally powered down The controller powers the nitrate sensor which the...

Страница 36: ...irmware enters low power sleep or turns itself off SL Send the most recently collected frame CTD Send current CTD values time temperature C salinity PSU depth m CTD Receive new CTD values time tempera...

Страница 37: ...Wavelengths 217 240 Part of spectrum used for fitting BAKE Turn on lamp for specified duration in seconds to sterilize the optical surfaces SLP Enter low power sleep OFF Turn off power to the sensor i...

Страница 38: ...firm NAK SPECTRA ErrMsg Report a command format error RTC RTC New ACK RTC CurrentTime ACK RTC NewTime Firmware expects ACK to confirm NAK RTC ErrorMessage Report a command format error SE SE ACK SE Nu...

Страница 39: ...mA The SUNA has two configuration values DAC Minimum Nitrate and DAC Maximum Nitrate that correspond to the lower and upper bounds of the voltage and current output If the nitrate concentration is bel...

Страница 40: ...stem Calibration The above defined scale and offset coefficients are based on the nominal minimum and maximum voltage and current values In a deployed system voltage and current may differ due to tran...

Страница 41: ...the in system calibrated current scale coefficient B0 DACmin B1 I low is the in system calibrated current offset coefficient The SUNA can be tasked to generate the low and high analog output via SUNA...

Страница 42: ...uild parameters are supported Sensor Identification Sensor Type SUNA Sensor Version V2 Sensor Serial Number 0000 9999 Table 18 SUNA build variants Option Description Super capacitors Provides short te...

Страница 43: ...y Reduced_Binary Concentration APF MBARI None Logging Frame Type Full_ASCII Full_Binary Reduced_Binary Concentration APF MBARI None Output Dark Frames Suppress Output Logging Dark Frames Suppress Outp...

Страница 44: ...of a number of samples or on the duration via the Operation Control configuration parameter Then the sensor will collect data in a D L L D D L schema If operation control is SAMPLES based the user con...

Страница 45: ...ection is driven by a controller via the serial interface When powered the sensor enters a low power standby Any activity on RS 232 or USB brings the sensor within three seconds to the polled command...

Страница 46: ...mode APF timeout 1 100 APF mode Skip Sleep at Start On Off Polled mode APF mode 5 4 Data Processing Configuration Data processing is independent of input output and data acquisition configuration 5 4...

Страница 47: ...the sensor will skip temperature salinity correction and output concentrations based on regular processing Configuration Temperature Correction Salinity Fitting 5 4 3 Special Case Bromide Tracing In f...

Страница 48: ...Subsection for Explanation Lower limit of fit interval 217 350 Basic processing Upper limit of fit interval 217 350 Basic processing Concentrations to fit 1 3 Basic processing Temperature correction O...

Страница 49: ...ometer sets a lower limit on the data rate Additional time is required for data processing and data output Output even at high baud rates is always slower than internal logging of data 6 1 2 Example T...

Страница 50: ...ss Temperature Compensation Off Salinity Fitting On Bromide Tracing Off Concentrations to fit 3 Dark Correction Method SpecAverage Absorbance Cutoff 1 3 Integration Time Adjustment On Fit Wavelength L...

Страница 51: ...ta processing step Alternatively the sensor can be configured to collect a single data sample that already is an average of multiple measurements Before the deployment the sensor must receive a refere...

Страница 52: ...3 Dark Correction Method SpecAverage Absorbance Cutoff 1 3 Integration Time Adjustment On Fit Wavelength Low High 217 240 Table 22 Configuration parameters illustrating a moored deployment 6 3 Free Fl...

Страница 53: ...llected by the following sequence of events each triggered by the controller Wake the sensor from low power sleep by activity on the RS 232 line This takes typically 3 seconds Ascertain responsiveness...

Страница 54: ...quisition Operation Mode APF Operation Control Samples External Device None Dark Averages 1 Light Averages 3 Process Temperature Compensation On Salinity Fitting Off Bromide Tracing Off Concentrations...

Страница 55: ...rames and SATSLC and SATSDC for concentration light and dark frames respectively The last four characters are the sensor serial number Example for serial number 1234 SATSLC1234 for concentration light...

Страница 56: ...AF AF BF 4 BF 4 Spectrum average AI BU 2 BU 2 Dark value used for fit AI BU 2 BU 2 Integration time factor AI BU 1 BU 1 Spectrum channels 256 x AI 256 x BU 2 32 x BU 2 Internal temperature C AF BF 4 S...

Страница 57: ...emperature C 27 34 Spectrometer Temperature C 28 12 Internal Relative Humidity 4 21 Supply Voltage V 11 78 Supply Current A 0 523 Reference Detector Mean 2345 Reference Detector Standard Deviation 6 5...

Страница 58: ...rated Table 26 MBARI data frame definition Frame Field Example Value Frame Type for dark frame or for light spectrum frame D S Timestamp GMT 7 22 2011 19 04 23 1234 Internal Temperature C 27 34 Spectr...

Страница 59: ...padding characters These are introduced by the XMODEM protocol that is used to transfer calibration files from and to the SUNA and must be ignored 8 3 File Interpretation The first header line always...

Страница 60: ...the upgrade command the SUNA s bootloader program executs It reports to the command line using the SATBLDR prompt Use the w command to initiate the firmware upload Then send the firmware file using t...

Страница 61: ...ampling volume should show a bright spot showing that the sensor lamp is operating If the current is above 5 mA the sensor is in standby and should respond to input over its serial input If the curren...

Страница 62: ...ng the reference spectrum in the currently active calibration file by a new reference spectrum Detailed instructions are provided in the SUNACom user manual If the concentrations inaccuracies persist...

Страница 63: ...ing trapped in the sample volume 11 2 Flow Cell The flow cell is an optional accessory used for moored applications with a pumped circulation system It is also useful for calibration updates The flow...

Страница 64: ...that have 1 4 20 threaded mounting points for the Teledyne Webb Research Slocum Glider The SUNA is mounted on top of the glider oriented in a manner that helps to prevent air bubbles and sediment from...

Страница 65: ...SUNACom user manual After every deployment the sensor must be cleaned with freshwater prior to storage Corrosion resulting from failure to do so is not covered under warranty At regular intervals chec...

Страница 66: ...dental shorting of the terminals Handle electrical terminations carefully as they are not designed to withstand strain Disconnect the cables from the bulkhead connector by pulling on the connector hea...

Страница 67: ...tlantic whether under warranty or not contact the Satlantic Customer Support Department and request a Returned Material Authorization RMA number and provide shipping details All claims under warranty...

Страница 68: ...com contact sales or sales satlantic com Support http satlantic com contact support or support satlantic com Service http satlantic com rma Written inquiries and returns may be sent to Satlantic LP R...

Страница 69: ...Deep SUNA Revision C 2014 05 15 3 2 3 Add M nitrate to mg l nitrogen conversion factor Revision D 2014 09 16 3 2 1 Add storage and operating temperature range 3 2 2 Add 1 A current requirement of pow...

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