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Sea-Bird Electronics SEACAT SBE 19 Operating Manual

Conductivity, temperature, depth recorder
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SEACAT SBE 19
CONDUCTIVITY, TEMPERATURE, DEPTH RECORDER
OPERATING MANUAL
SEA-BIRD ELECTRONICS, INC.
1808 136th Place NE
Bellevue, Washington 98005 USA
Phone: (425) 643 9866
Fax: (425) 643-9954
Telex: 292915 SBEI
email: seabird@seabird.com
vers. 19.19

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Summary of Contents for Sea-Bird Electronics SEACAT SBE 19

  • Page 1 SEACAT SBE 19 CONDUCTIVITY, TEMPERATURE, DEPTH RECORDER OPERATING MANUAL SEA-BIRD ELECTRONICS, INC. 1808 136th Place NE Bellevue, Washington 98005 USA Phone: (425) 643 9866 Fax: (425) 643-9954 Telex: 292915 SBEI email: seabird@seabird.com vers. 19.19...
  • Page 2 SEA-BIRD ELECTRONICS, INC. disclaims all product liability risks arising from the use or servicing of this system. SEA-BIRD ELECTRONICS, INC. has no way of controlling the use of this equipment or of choosing the personnel to operate it, and therefore cannot take steps to comply with laws pertaining to product liability, including laws which impose a duty to warn the user of any dangers involved in operating this equipment.

  • Page 3: Table Of Contents

    SBE 19 SEACAT PROFILER TABLE OF CONTENTS INTRODUCTION ......................1 FUNCTIONAL DESCRIPTION ..................2 1-2.1 SENSORS ......................2 1-2.2 SENSOR INTERFACE ..................... 2 1-2.3 REAL-TIME CLOCK ....................2 1-2.4 MEMORY ......................3 1-2.5 MAGNETIC REED SWITCH ..................3 1-2.6 DATA I/O ......................4 1-2.7 BATTERIES ......................
  • Page 4 INSTALLATION AND OPERATING INSTRUCTIONS ............32 3-1.1 BATTERY INSTALLATION ..................33 3-1.2 PUMP OPERATION ....................33 3-1.3 DEPLOYMENT ..................... 34 3-1.4 OPTIMIZING DATA QUALITY ................34 3-1.5 RECOVERY ......................35 3-1.6 STORAGE ......................36 COMMON PROBLEMS AND THEIR CURES ..............36 4-1.1 UNABLE TO COMMUNICATE WITH PROFILER ............

  • Page 5: Introduction

    INTRODUCTION The SBE 19 SEACAT Profiler is designed to measure electrical conductivity, temperature, and pressure in marine or fresh water environments to depths up to 10,500 meters. The standard SEACAT Profiler will operate in two modes, profiling and moored. Profiling mode is designed for applications where vertical profiles of the measured parameters are required.

  • Page 6: Functional Description

    FUNCTIONAL DESCRIPTION 1-2.1 SENSORS SEACAT embodies the sensor elements (Pyrex cell and pressure-protected thermistor) and Wein-bridge oscillator interface technique previously employed in Sea-Bird's modular SBE 3 and SBE 4 sensors, but differs in using multiplexing to allow a single oscillator to service both temperature and conductivity measurements.

  • Page 7: 1-2.4 Memory

    1-2.4 MEMORY Memory consists of eight low standby-power CMOS static 128K X 8 RAM chips. Each recorded CTD scan contains 6 bytes of data (standard units), and 4000 bytes are reserved for scratch-pad use, including storage of header information containing cast number (up to 150 casts), time/date, and beginning and ending sample number for the cast.

  • Page 8: 1-2.6 Data I/O

    1-2.6 DATA I/O SEACAT Profiler receives set-up instructions and outputs diagnostic information or previously recorded data via a 3-wire RS-232C link, and is factory-configured for 600 baud (1200 baud with optional Paroscientific pressure sensor), 7 data bits, 1 stop bit, and even parity. SEACAT Profiler RS-232 levels are directly compatible with standard serial interface cards (IBM Asynchronous Communications Adapter or equal).

  • Page 9: Specifications

    SPECIFICATIONS Measurement Range: Temperature -5 to +35 ºC Conductivity 0 to 7 S/m (0 to 70 mmho/cm) Pressure Strain Gauge Sensor 100, 150, 300, 500, 1000, 1500, 3000, 5000, 10000, or 15000 psia Digiquartz Sensor 100, 200, 300, 400, 1000, 2000, 3000, 6000, 10000, or 15000 psia Accuracy: Temperature...

  • Page 10: Configuration Options

    CONFIGURATION OPTIONS The SEACAT Profiler’s standard configuration includes an externally mounted SBE 5M submersible pump, used to provide a constant flow rate through the conductivity cell. Optionally, if configured with a dissolved oxygen sensor, pumped fluorometer, or SEACAT T-C Duct, the more powerful SBE 5T pump is used.

  • Page 11: Seacat Profiler Communication Fundamentals

    The SEACAT Profiler is configured with the SBE 5 pump to insure a reliable flow of water through the conductivity cell and optional dissolved oxygen sensor regardless of descent rate. Figure 2 shows the plumbing arrangement of a CTD equipped with a pump. Sections 2-2.6 and 3-1.2 of this manual contains additional information on the configuration and operation of the pump.

  • Page 12: 2-2.1 Command Format

    To begin communicating with SEACAT Profiler, the magnetic switch should be off. Mate the 4-pin test cable to the computer's serial port. If you are using Sea-Bird SEASOFT software, the serial port must be an IBM Asynchronous Communications Adapter, or equal. Run the TERM19 program and establish communications with the Profiler.

  • Page 13: 2-2.2 Editing

    2-2.2 EDITING The following keys are used to edit entries to SEACAT Profiler. Description ASCII Carriage return: enters the command or line Backspace: deletes the previous character Kill line: Ctrl X Kill line: Escape Kill line: Ctrl C 2-2.3 COMMAND SUMMARY Type Command Description...

  • Page 14: 2-2.4 Diagnostics

    2-2.4 DIAGNOSTICS J(CR) Measure Standby current. TE(CR)*^C Extended memory test. WARNING, ALL DATA IN SEACAT PROFILER WILL BE DESTROYED! An incrementing pattern is written into all locations of each RAM. Data in the RAM is then compared to the pattern. Each pass the pattern is incremented by one. Each pass takes approximately 20 seconds and the test concludes after 10 passes.

  • Page 15: 2-2.5 Status

    Example: FR(CR) SEACAT will send: aaaaa.aaa bbbbb.bbb ccccc.ccc ddddd.ddd eeeee.eee fffff.fff aaaaa.aaa is the 400 ohm reference resistor frequency bbbbb.bbb is the 5000 ohm reference resistor frequency ccccc.ccc is the frequency generated by the temperature sensor ddddd.ddd is the frequency generated by the conductivity cell eeeee.eee is the corrected temperature frequency fffff.fff...

  • Page 16: 2-2.6 Setup

    In moored mode the voltage sample delay is displayed. SEACAT PROFILER V3.1B SN 936 02/10/94 13:33:39.549 strain gauge pressure sensor: S/N = 12345, range = 1000 psia, tc = 240 clk = 32767.766 iop = 172 vmain = 8.2 vlith = 5.6 mode = MOORED sample interval = 30 seconds delay before measuring voltages = 4 seconds...
  • Page 17 In moored mode the instrument powers down between samples. The fastest sample rate is once every 15 seconds. The default amount of time that SEACAT Profiler will provide power to external sensors before sampling them is 4.0 seconds. This value can be increased to a maximum of 32,000 seconds with the VD command for instruments such as the Sea Tech fluorometer that need a longer time to come to a stable value.
  • Page 18 Upon initial power up or reset the SEACAT Profiler will default to communicating at 600 baud. This command allows the user to change this baud rate to one of the values listed below. When this command is given, the SEACAT will immediately change its baud rate and all subsequent communication will be at the new baud rate.
  • Page 19 SI(CR) Set sample interval as prompted for moored mode. Example: SI(CR) SEACAT Profiler will prompt: number of seconds between samples = 60 sample interval = 60 seconds The minimum sample interval is 15 seconds, the maximum is 32000 seconds. ST(CR) Set date and time as prompted Example: ST(CR) date (MMDDYY) = 042387(CR) time (HHMMSS) = 191026(CR)

  • Page 20: 2-2.7 Logging

    2-2.7 LOGGING In profiling mode, data logging can be initiated by turning on the magnetic switch while the SEACAT Profiler is in the quiescent state or by using the GL or RL commands when the CPU is active and the magnetic switch is on.

  • Page 21: 2-2.8 Stop Logging

    2-2.8 STOP LOGGING In profiling mode, turn off the magnetic switch. Logging may also be terminated in profiling mode by sending a NULL character (CONTROL Z or HOME KEY in TERM19) to SEACAT Profiler. In moored mode, logging is terminated by establishing communications with the SEACAT Profiler and sending the QL command.

  • Page 22: Data Format

    DH[[n1],n2](CR)^C Display headers. If n1 and n2 are omitted all headers are displayed. Entering n1 and n2 displays headers n1 through n2. If n1 equals n2 then only that one header is displayed. A new header is written when data logging is started or resumed in profiling mode. In moored mode a new header is written when data logging is initiated and every 1000 samples thereafter.

  • Page 23: 2-3.1 Profiling Mode

    2-3.1 PROFILING MODE Temperature and conductivity data are stored as uncorrected (raw) frequencies. The reference data that is used to convert to corrected frequencies is stored in the 5th and 6th scans. Subsequently, after every 120 scans two data scans are replaced by the two reference scans. 2-3.1.1 PAINE STRAIN GAUGE PRESSURE Twelve ASCII HEX characters representing six bytes are transmitted per CTD scan.
  • Page 24 Narrow Range Conductivity: 1. C = decimal equivalent of bbbb 2. Raw conductivity frequency = sqrt(C * 303 + 6250000) Voltage: 1. V = decimal equivalent of uuu, vvv, xxx, or yyy 2. Volts = V / 819; Pressure: 1. P = decimal equivalent of bits 0 through 13 of pppp. Bit 14 is the sign bit. If bit 14 is 0 the number is positive, if it is 1 the number is negative.
  • Page 25 scan 119 (Low frequency reference) xx = FF rrrrrr = 0B4580, Reflow = 2885.500 pppp = 8EA4, P = 3748, pressure number = 3748 scan 120 (CTD): aaaa = 69CE, T = 27086, temperature frequency = 3543.177 bbbb = 431E, C = 17182, conductivity frequency = 7488.511 pppp = 0EA5, P = 3749, pressure number = 3749 The reference data is used to compute the corrected temperature and conductivity frequencies.

  • Page 26: 2-3.1.2 Paroscientific Digiquartz Pressure Sensor

    2-3.1.2 PAROSCIENTIFIC DIGIQUARTZ PRESSURE SENSOR 18 ASCII HEX characters representing 9 bytes are stored per CTD scan. A carriage return line feed follows the data from the last CTD scan. The data format for CTD scans is : aaaabbbbppppppcccc aaaa = four HEX characters representing 2 bytes of temperature data bbbb = four HEX characters representing 2 bytes of conductivity data pppppp = six HEX characters representing 3 bytes of Digiquartz pressure data cccc = four HEX characters representing 2 bytes of pressure temperature data...

  • Page 27: 2-3.2 Moored Mode

    2-3.2 MOORED MODE Moored mode temperature and conductivity data are stored as corrected frequencies. The reference information is not stored with the data. Otherwise, the data format is the same as profiling mode except for the conversion of temperature and standard range conductivity from hexadecimal numbers to decimal frequencies.

  • Page 28: Operation Using Term19

    OPERATION USING TERM19 TERM19 is a terminal emulation program designed to communicate with SEACAT Profiler: characters typed on the keyboard are sent to SEACAT Profiler and characters sent by SEACAT Profiler are displayed on the console. TERM19 expects to find the file TERM19.CFG in the current directory. SEACAT Profiler will automatically send ^S and ^Q characters if the computer does not keep up with the data sent by SEACAT Profiler.

  • Page 29: 2-5.1 Terminal Set Up Form

    Upload data from the instrument. The upload parameters are configured in the set up menu (Function Key 2). Exit to DOS. Ctrl-C Sends Ctrl-C to the instrument to halt the display voltages and display frequencies diagnostics. Ctrl-F10 or Home Stop Logging (sends a Null character to the instrument). On the bottom status line: Baud =Displays the current baud rate Capt = Displays the capture to disk status.
  • Page 30 The Communication Set Up Form is: ┌──────────────────────────────────────────────────────────────────────────────┐ │ SBE 19 Terminal Program 4:51 pm │ Thursday January 16, 1992 └──────────────────────────────────────────────────────────────────────────────┘ ╔══════════════════════════════════════════════════════════════════════════════╗ ║ ║ TERM19 Set Up Parameters ╠══════════════════════════════════════════════════════════════════════════════╣ ║ SBE 19 EPROM (Firmware) Version = 3.0 or Greater ║ ║ ╔════════════════════════════════════════════════════════════╗...

  • Page 31: 2-5.2 Data Upload Setup Form

    2-5.2 DATA UPLOAD SETUP FORM ┌──────────────────────────────────────────────────────────────────────────────┐ │ SBE 19 Terminal Program 4:51 pm │ Thursday January 16, 1992 └──────────────────────────────────────────────────────────────────────────────┘ ╔══════════════════════════════════════════════════════════════════════════════╗ ║ ║ TERM19 Set Up Parameters ╠══════════════════════════════════════════════════════════════════════════════╣ ║ ╔══════════════════════════════════════════════════════════════════════════╗ ║ ║ ║ ║ ║ Data Upload Set Up Parameters = ║...
  • Page 32 The Echo Choices are: Echo Data During Upload: The HEX data from the instrument is displayed on the screen as it is received Display One '.' Every 16th scan during Upload: Will shorten the time required to upload the data. Output HEX Data File Path = Enter the path where you wish the uploaded HEX file to be written.

  • Page 33: 2-5.3 Terminal Program: Field Operation

    Default Upload File Name [.HEX] = If the upload file name choice is 'Use Default File Name' then this default file name is used along with the upload session number and the cast number to form the complete upload file. The maximum length for the default file name is 4 characters.

  • Page 34: 2-6.1 Sample Session - Profiling Mode

    2-6.1 SAMPLE SESSION - PROFILING MODE Verify that the file SEASOFT.CON is correct for your system by running the SEACON program and examining the instrument configuration and calibration information with that contained in this manual. 2-6.1.1 RECORD DATA WITH SEACAT PROFILER (COMPUTER INITIATED) 1.

  • Page 35: 2-6.1.3 Retrieve Data From Seacat Profiler

    3. Enter DS(CR) to display SEACAT Profiler status. A typical response would be: SEACAT PROFILER V3.1B SN 936 02/10/94 13:33:06.439 strain gauge pressure sensor: S/N = 12345, range = 1000 psia, tc = 240 clk = 32767.766 iop = 172 vmain = 8.1 vlith = 5.7 mode = PROFILE ncasts = 1 sample rate = 1 scan every 0.5 seconds samples = 505 free = 173616 lwait = 0 msec...

  • Page 36: 2-6.1.4 Display Seacat Profiler Data Using Seasoft

    4. Enter DH(CR) to display headers. cast 0 09/10 08:01:15 samples 0 to 924 sample rate = 1 scan every 0.5 seconds stop = recv cmd cast 1 09/10 12:30:33 samples 925 to 1504 sample rate = 1 scan every 0.5 seconds stop = recv 5.

  • Page 37: 3-1.1 Battery Installation

    3-1.1 BATTERY INSTALLATION Unthread the battery compartment end cap (end cap without any connectors). Remove the three Phillips- head machine screws from the battery retainer plate immediately inside the pressure housing. Lift this plate clear. Batteries are installed with the + terminal against the flat battery contacts and the - terminal against the spring contacts.

  • Page 38: 3-1.3 Deployment

    3-1.3 DEPLOYMENT Check that the anodes have not been eroded away, and that hardware and external fittings are secure. Refer to Section 2 for information on programming SEACAT Profiler for the desired operating routine, and confirm that memory capacity is sufficient. Make sure that the self-diagnostic battery voltage is proper. A screen dump (to a printer) of SEACAT Profiler's response to the DS command makes a useful record of the instrument's pre-deployment condition.

  • Page 39: 3-1.5 Recovery

    water sampler can have a dramatic effect on data quality. The optional SEACAT T-C Duct can be used to overcome dynamic errors induced by a poor mounting method or location (see Application Note 51). Where the water temperature is markedly different from the temperature at which the Profiler has been stored, better results will be obtained if the Profiler is allowed to equilibrate to the water temperature at the surface (soak) for a minute or two before beginning the profile.

  • Page 40: 3-1.6 Storage

    The program TERM19 (supplied with SEACAT) may be used with an IBM PC/XT/AT or compatible to create MS-DOS files from the recorded data. Make a back-up disk containing a copy of the MS-DOS file, put on a write-protect tab, and store the disk in a safe place! Leave the main batteries in place when storing SEACAT to prevent depletion of the back-up lithium cells by the real-time clock.

  • Page 41: 4-1.2 No Data Recorded

    4-1.2 NO DATA RECORDED Profiler must be in quiescent mode before it will respond to the magnetic switch and begin taking data. Quiescent mode is entered by entering QS[CR] when communicating with a computer or terminal, or waiting about 3 minutes after the last keyboard command. It is best to always use the QS command when ending a data readout, diagnostic, or set-up session with a computer or terminal.

  • Page 42: Routine Maintenance And Calibration

    ROUTINE MAINTENANCE AND CALIBRATION 5-1.1 CORROSION PRECAUTIONS On aluminum-housed units, there is a large zinc anode screwed into the battery end-cap, and a second on the conductivity cell guard is also used on plastic versions. These anodes should be checked from time to time to see that they are securely fastened, and have not been eaten away.
  • Page 43 5-1.3.1 CONDUCTIVITY SENSOR CALIBRATION The conductivity sensor incorporates a fixed precision resistor in parallel with the cell. When the cell is dry and in air, the sensor's electrical circuitry will output a frequency representative of the fixed resistor. This frequency is recorded on the calibration certificate and should remain stable (within 1 Hz) over time. The primary mechanism for calibration drift in conductivity sensors is the fouling of the cell by chemical or biological deposits.

  • Page 44: Description Of Seacat Profiler Circuitry

    DESCRIPTION OF SEACAT PROFILER CIRCUITRY SEACAT Profiler circuitry is contained on three rectangular (approximately 75 X 250 mm) printed boards supporting analog, cpu, and memory functions. The cpu and memory boards are interconnected at several points by means of pin and socket SIP connectors to form a digital 'module'. A single DIP interboard connector is used to carry the 26 lines between the analog board and the digital module.

  • Page 45: 6-1.3 Wein-Bridge Oscillator

    6-1.3 WEIN-BRIDGE OSCILLATOR The Wein-bridge oscillator (WBO) is configured as a controlled-gain amplifier using high-frequency bipolar transistors and low-valued load resistors to achieve minimum phase shift. An input FET provides high impedance to the WBO frequency-determining components (two fixed capacitors, a fixed resistor, and the unknown sensor resistance) while an emitter follower presents and a low driving impedance to the MOSFET gain control element.

  • Page 46: 6-1.7 Real-Time Clock

    6-1.7 REAL-TIME CLOCK RTC oscillator circuitry (Memory Board transistor oscillator, CMOS buffer/squaring) is on the Memory Board. A flip-flop converts the 3 v p-p squared oscillator output to the 5 volt level required for SEACAT Profiler's digital circuitry. The RTC oscillator frequency is counted during each data acquisition cycle using SEACAT Profiler's precision TCXO.

  • Page 47: O-Ring Sizes

    O-RING SIZES O-RING SIZES (600, 3400, AND 6800 METER CASE PROFILERS) Battery end-cap (piston) seal: Parker 2-234E603-70 Battery end-cap (face) seal: Parker 2-153N674-70 Sensor end-cap (piston) seal: Parker 2-233E603-70 Sensor end-cap (crush) seal Parker 5-374E603-70 I/O bulkhead connector: Parker 2-017N674-70 Conductivity cell penetrator: Parker LS-001 O-RING SIZES (7000 AND 10500 METER CASE PROFILERS)

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