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Summary of Contents for Sea-Bird Scientific SUNA V2
- Page 1 User manual SUNA V2 Submersible Ultraviolet Nitrate Analyzer Document No. SUNA170925 Release Date: 2017-09-25 Version: 425-643-9866 seabird.com...
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Page 3: Table Of Contents
Table of Contents Section 1 Specifications ........................3 1.1 Mechanical........................... 3 1.1.1 Bulkhead connector......................3 1.2 Electrical............................3 1.3 Optical............................4 1.4 Analytical............................4 1.4.1 Nitrate measurement accuracy................... 4 1.4.2 Nitrate measurement precision................... 4 Section 2 Operation ..........................5 2.1 Install and start software......................5 2.2 Verify sensor operation........................ - Page 4 Table of Contents 4.5 Interferences and mitigation....................... 38 4.5.1 Uncharacterized species in sample...................38 4.5.2 Optically dense constituents....................39 4.5.3 Identification of interfering species..................39 4.5.4 Sensor function......................... 39 4.6 CDOM absorption........................40 4.7 Optional equipment........................41 4.7.1 Wiper..........................41 4.7.2 Anti-fouling guard......................41 4.7.3 Flow cell..........................
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Page 5: Section 1 Specifications
Section 1 Specifications 1.1 Mechanical SUNA with optional wiper Standard SUNA Rated depth 100 m 500 m Weight (in air) 4.8 kg 3.9 kg Pathlength 10 mm 5 mm 10 mm 5 mm Length 58.8 cm 58.3 cm 55.1 cm 54.6 cm Displacement 2077 cm³... -
Page 6: Optical
Specifications 1.3 Optical Spectral range 190–370 nm Light source UV deuterium lamp Light source lifetime 900 hrs 1.4 Analytical This sensor is designed to measure the concentration of nitrate ions in water. Measurements are in units of micro molar (µM). This is converted into mg/L, and also digital output. -
Page 7: Section 2 Operation
Section 2 Operation W A R N I N G Nitrate sensors use an ultraviolet (UV) light. Do not look directly at a UV light when it is on. It can damage the eyes. Keep products that have UV light away from children, pets, and other living organisms. -
Page 8: Verify Sensor Operation
Operation 2.2 Verify sensor operation Do the steps below to make sure that the sensor operates, collects, and transfers data with the settings selected by the user before further setup and deployment. 1. Connect the cable to the bulkhead connector on the sensor and to the PC. 2. - Page 9 Operation • Real Time Data—Put a check in each box next to each parameter for which the sensor will collect data. • Data Logging—Push Start Log to save the collected data to the PC. • Time Series, Spectra, and Total Absorbance graphs. 3.
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Page 10: Monitor Data In Spectra Graph
Operation • Push Auto Range to see the data for each selected parameter. The software adjusts the scale so that the data will always show. • Push Default Ranges to go back to the manufacturer-set default scale for each parameter. •... -
Page 11: Monitor Data In Absorbance Graph
Operation 1. Put a check in the box next to either or both the "Time Axis" or the "Range Axis" to enable the Zoom In or Zoom Out options. 2. Push Select Sensors either in the Spectra graph or in the Real Time Display tab to select the parameters to see on the graph. -
Page 12: Set Up Sensor For Deployment
Operation 2. Select one or more files to copy to the PC. The manufacturer recommends that the user use a USB connection to move the files because it is much faster. 3. Push the <- arrow to start the move. The status shows at the bottom of the File Manager window. -
Page 13: Set Up For Autonomous Deployment
Operation 2.5.2 Set up for autonomous deployment Autonomous modes • Continuous operation—when started, the sensor operates until the user removes power or pushes Stop in the SUNA Dashboard. • Fixed-time operation—the sensor operates for a user-specified period of time or number of measurements. -
Page 14: Set Up For Sdi-12 Deployment
Operation 2.5.3 Set up for SDI-12 deployment Note: SDI-12 operation is not available on sensors rated to 2000 m. The user can deploy the standard-depth sensor in a logger-controlled mode through an RS232 connection or an SDI-12 controller. 1. Set up the sensor in SDI-12 mode to operate with a controller. 2. -
Page 15: Section 3 Maintenance
Section 3 Maintenance 3.1 Sensor maintenance W A R N I N G If the user thinks that a sensor has water in the pressure housing: Put on safety glasses and make sure that the sensor is pointed away from the body. Use the purge port (if the sensor is so equipped), or very SLOWLY loosen the bulkhead connector to allow the pressure to escape. -
Page 16: Update Reference Spectrum
Maintenance Table 3 Examples of damaged connectors Corroded connector Damaged contact Damaged socket face 5. Use a finger to place a small quantity, approximately 1.5 cm in diameter of Dow ® Corning 4 Electrical Insulating Compound on the socket end of the connector. Table 4 Lubricant on connector sockets Lubricant on socket end of the connector Lubricant pushed into the sockets of the connector... - Page 17 Maintenance Necessary supplies: • Power supply • PC with software • Connector cable for sensor–PC–power supply • Clean de-ionized (DI) water • Lint-free tissues • Cotton swabs • Isopropyl alcohol (IPA) ® • Parafilm wrap Notes ™ • Use only lint-free tissues, OPTO-WIPES , or cotton swabs to clean the optical windows.
- Page 18 Maintenance Figure 3 Optical area filled with DI water 5. Supply power to the sensor and start the software if necessary. 6. Make sure that the sensor operates in Continuous mode: push Settings, then in the General tab, select "Continuous" for the "Operational Mode." 7.
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Page 19: Update Firmware
Maintenance 3.4 Update firmware At regular intervals, make sure that the current firmware is installed in the SUNA. 1. Go to the manufacturer's web site to get the current firmware for the sensor. 2. Save the firmware to the PC. The firmware is an ".sfw"... - Page 20 Maintenance...
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Page 21: Section 4 Reference
254 and 300 nm and Root Mean Square Error (RMSE) to measure the quality of the data. The file extension is .csv. • APF—Deep SUNA V2 only. Used for APEX floats. Contains the user-selected parts of the spectrum and other auxiliary sensors. The frame size is typically 300–400 bytes. -
Page 22: File Types
Reference • By File Size—The software makes a new file when the data file in use gets to the user-selected maximum size. The file name starts with "C" ("Continuous" file). • By Sample Event—The software makes a new file when data collection starts for the first time after the power has been turned off, then on. -
Page 23: Continuous And Fixed-Time Operation
Reference Table 5 Information in data files (continued) Fit aux 2 BF 4 Fit base 1 BF 4 Fit base 2 BF 4 Fit RMSE BF 4 if CTD: Time, secs BU 4 if CTD: Salinity, PSU BF 4 if CTD: Temperature, °C BF 4 if CTD: Pressure, dBar BF 4... -
Page 24: Logger-Controlled Operation
Reference 1. Select a "Sample Interval" from the drop-down menu. 2. Look at the "Offset" value. An offset value of 300 (5 min) changes the start time by five minutes, for example, from 06:00 to 06:05. 3. The "Light Frames" value is 0–255. Data is collected for either a user-selected quantity of time or a user-selected number of measurements. -
Page 25: Analog Operation
Reference Command Result Start Start continuous data collection. Stops the sensor data collection. Measure N The sensor gets "n" light data frames. If "n" is zero, the sensor gets one dark data frame. Timed N The sensor gets light data frames for "n" seconds. The sensor sends CTD data to be corrected for temperature and salinity. -
Page 26: Other General Settings
Reference where— = (DAC - DAC ) / (V is the voltage scale coefficient = DAC × V is the voltage offset coefficient = (DAC - DAC ) / (I is the current scale coefficient = DAC × I is the current offset coefficient Calibrate the sensor in-system The voltage and current values in a deployed system may be different from the nominal values and should be used instead. -
Page 27: Data Acquisition Monitor
Reference The user can select additional parameters to look at from the Real Time Display tab in the main window of the software. Push Select Sensors and put a check in the box next to the parameter to measure. 4.1.7 Data acquisition monitor The software monitors the data collected by the sensor and shows any errors in this window. -
Page 28: Convert Suna Raw Data
Reference 4.1.8.1 Convert SUNA raw data The user can collect data in either an ASCII or binary format. Although binary files require less storage space and are faster to transmit than ASCII, binary files are not human- readable and must be converted. Use the software to convert binary to ASCII, and also to "convert"... -
Page 29: Reprocess Suna Data
Reference • "Frame Counter (if available)"—put a check so that the value increases by one from frame to frame. Any increments larger than one will show in the Application Console. • "Check Sum (if available)"—put a check so that each frame is examined. Correct frames have a zero entry in the checksum field. - Page 30 "Temperature and Salinity Correction" is available if the sensor is calibrated for seawater and water temperature and salinity data ("T-S data") are collected. This data can come from frames if the sensor operates in APF mode (SUNA V2 deep only), or from an external file.
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Page 31: Replay Suna Data
Reference 1. The default "Activate Temperature & Salinity Correction" has no check in the box. Put a check in this box to add T-S data correction information. 2. Select either "CTD Data from SUNA APF Mode Frames" or "Data from External File" to get T-S data from an external file. -
Page 32: Compare Reference Spectrum Files
Above 240 nm, the change is smaller than at the 215–240 nm range. If there is a large change, do several reference updates 12–24 hours apart to monitor the stability of the reference spectrum. 4.2 SDI-12 operation Note: SDI-12 operation is not available on SUNA V2 deep sensors. - Page 33 Reference The manufacturer-set address of the SDI-12 is numerical value 48 (ASCII character 0). The SDI controller uses this address to interface with the sensor in an SDI-12 mode of operation. The user can change this value in the SDI controller. Note: "Polled"...
- Page 34 = 3-character sensor version. For example, "v2" xxxxxxxxxxxxx = up to 13-character optional field. Format: F<MAJOR>.<MINOR>.<PATCH> Used for firmware by the manufacturer. Example 013SATLANTC SUNA v2 0002F2.1.2<CR><LF> Start Measurement (aM!) Start Measurement and Request CRC (aMC!) Start Concurrent Measurement (aC!)
- Page 35 Reference Example output from the controller: 00M1! 00067 <CR><LF> 0D0! 0+22.7+22.5+141779+46.8<CR><LF> 0D1! 0+12.0+5.0+14.0<CR><LF> Example output from the controller for the seven values— Example output values in parentheses: lamp temperature, °C (22.7) spectrometer temperature, °C (22.5) lamp time, seconds (141779) relative humidity, % (46.8) internal voltage, V (12.0) regulated voltage, V (5.0) supplied voltage, V (14.0)
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Page 36: Terminal Program
Reference Additional Measurements (aM3–aM9!) Additional Measurements and Request CRC (aMC3!–aMC9!) Additional Concurrent Measurement (aC3!–aC9!) Additional Concurrent Measurement and Request CRC (aCC3!–aCC9!) Response atttn<CR><LF> atttnn<CR><LF> Purpose starts a measurement. starts a concurrent measurement. Notes The sensor supports 2 additional measurements. ttt = 000 n = 0 nn = 00 "Send Data"... - Page 37 Reference When power is supplied to the sensor, the sensor goes into a low-power "standby" mode. Any activity on the input line puts the sensor to the "SUNA>" command interface within three seconds. The sensor returns to low-power standby after a user-selected period of time with no communication.
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Page 38: Input-Output Configuration Values
Reference 7. To change the mode of operation to SDI-12: a. Make sure that the sensor is so equipped. Type "getopermodesdi12brd" The response is "available." If the response is "missing", the sensor is not equipped with SDI-12. b. Type "set opermode sdi12" to change the mode of operation to SDI-12. c. -
Page 39: Theory Of Operation
Reference Dark duration (sec) 1–65535 drkdurat Light duration (sec) 1–65535 lgtdurat External device none, wiper none exdevtyp Ext. dev. pre-run time (sec) 1–120 exdevper Ext. dev. during collection on, off exdevrun Ext. dev. minimum interval 1–1440 exdvival Periodic Mode of Operation: When power is supplied to the sensor, the sensor goes to a low-power standby mode. -
Page 40: Description Of Nutrient Units
(ppm), the mass of N relative to the mass of water. The SUNA V2 sensor measures dissolved nitrate and displays units in micromolar (µM) or milligrams of nitrogen per liter (mg/N/L). The SUNA V2 does not display milligrams of nitrate per liter (mg/L or mgNO /L ). -
Page 41: Optically Dense Constituents
Reference If the user thinks there are significant concentrations of interfering species, do a random spectral and chemical analysis of the water sample to quantify and correct the optical interference. 4.5.2 Optically dense constituents The performance of the sensor is compromised in optically dense conditions, which transmit less light than necessary for the regression analysis. -
Page 42: Cdom Absorption
If the absorption of the sample is high (default cut-off = 1.3 AU), the model can no longer be used effectively to fit parameters or calculate nitrate concentration. The SUNA V2 data output is an RMSE parameter that indicates the quality of the fit of the models to the absorption curves. -
Page 43: Optional Equipment
Reference RMSE: The root mean square error parameter from the SUNA V2 can be used to make an estimate of how well the nitrate spectral fit is. This should usually be less than 1E-3. If it is higher, there is spectral shape (likely due to CDOM) that adversely impacts the nitrate estimate. -
Page 44: Flow Cell
Reference 4.7.3 Flow cell Use the flow cell for moored deployments that require a pump. Attach the flow cell to the sensor with the manufacturer-supplied plastic clamp. The flow cell seals against the pressure housing of the sensor so that the water from the pump flows across the optical path of the sensor. -
Page 45: Section 5 Troubleshooting
Section 5 Troubleshooting W A R N I N G Nitrate sensors use an ultraviolet (UV) light. Do not look directly at a UV light when it is on. It can damage the eyes. Keep products that have UV light away from children, pets, and other living organisms. -
Page 46: Troubleshooting
Troubleshooting Table 9 Communication Possible problem Possible solution Collected data is different from • Verify the clock settings in the sensor. transmitted data • Make sure that there is no extra averaging or data collection in the setup. • Verify the data output settings. Problems with sensor-to- •... -
Page 47: Suna Warnings And Error Messages
Troubleshooting 5.1 SUNA warnings and error messages Possible problem Possible solution Data warnings and error Contact Customer Support. If possible, have the information listed below: messages • screenshot of the "Application Console" of the software. • "messages.log" file—go to the Transfer Files window and select the Log Files tab. Copy the file to the PC for Customer Support. - Page 48 Troubleshooting...
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Page 49: Section 6 General Information
Section 6 General information Revised editions of this user manual are on the manufacturer's website. 6.1 Warranty This sensor is warranted against defects in materials and workmanship for one year from the date of purchase. The warranty is void if the manufacturer finds the sensor was abused or neglected beyond the normal wear and tear of deployment. - Page 50 General information...
- Page 52 Sea-Bird Electronics 13431 NE 20th Street Bellevue WA 98005 U.S.A. (425) 643-9866 © Satlantic, Inc., 2017. All rights reserved. *SUNA170925*...
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