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1. Note BAUD x x baud rate 1200 2400 4800 9600 The MicroCAT s baud rate set with 192 4 Default BAUD command must be the Re Oe rae eres same as SEATERM s baud rate set in the Configure menu OUTPUTTIME x x Y output date and time x N do not OUTPUTSAL x x Y calculate and output salinity psu x N do not OUTPUTSV x x Y calculate and output sound velocity m sec using Chen and Millero formula UNESCO Technical Papers in Marine Science 44 x N do not OUTPUTDEPTH x x Y calculate and output depth meters using LATITUDE in calculation x N do not OUTPUTDENSITY x x Y calculate and output local density sigma kg m based on salinity temperature and pressure Sigma s t p density 1000 kg m x N do not LATITUDE x x latitude degrees to use in depth calculation Applicable only if OUTPUTDEPTH Y REFPRESS x x reference pressure gauge in decibars MicroCAT without installed pressure sensor uses this reference pressure in conductivity salinity sound velocity depth and density calculations Entry ignored if MicroCAT includes pressure sensor 26 Section 4 Deploying and Operating the MicroCAT Setup Commands continued Notes See Data Output Formats after these Command Descriptions for details Notes Binary data does not include date and time salinity sound velocity depth or density regardless of the settings for OUTPUTT
2. Wake up when power applied and take and output a single sample Wait for another command until power removed 28 Section 4 Deploying and Operating the MicroCAT Sampling Commands These commands are used by an external controller to request a sample from the MicroCAT The MicroCAT stores data for the most recent sample in its RAM The MicroCAT does not automatically power off after executing these commands Do not send these commands if MicroCAT is sampling data at pre programmed intervals defined by INTERVAL and SINGLESAMPLE TS TSR SLT TH SH SB Take sample hold converted data in RAM output converted data Take sample hold raw data in RAM output raw data Send last sample from RAM output converted data then take new sample and hold converted data in RAM Take sample hold converted data in RAM Send held converted data from RAM Send held converted data from RAM in binary form Only applicable if OUTPUTBINARY Y Testing Commands TT TC TP TTR TCR TPR TR 29 Measure temperature for 100 samples or until Esc key is pressed output converted data Measure conductivity for 100 samples or until Esc key is pressed output converted data Measure pressure for 100 samples or until Esc key is pressed output converted data Measure temperature for 100 samples or until Esc key is pressed output raw data Measure conductivity for 100 samples or until
3. unlike platinum or copper elements the thermistor is insensitive to shock Pressure Sensor optional Calibration The optional strain gauge pressure sensor is a mechanical diaphragm type with an initial static error band of 0 05 Consequently the sensor is capable of meeting MicroCAT s 0 10 error specification with some allowance for aging and ambient temperature induced drift For demanding applications or where the sensor s air ambient pressure response has changed significantly calibration using a dead weight generator is recommended The pressure sensor port uses a 7 16 20 straight thread for mechanical connection to the pressure source Refer to Application Note 12 1 found on Sea Bird s website for the general calibration procedure The pressure sensor port thread size in the Application Note is not applicable to the MicroCAT 34 Section 5 Routine Maintenance and Calibration Replacing Anti Foul Cylinders WARNING e Anti foul cylinders contain tri butyl tin oxide TBTO Handle the cylinders with gloves If the cylinders come in contact with skin wash with soap and water immediately Dispose of gloves properly Refer to the Material Safety Data Sheet enclosed with the shipment for details Anti foul cylinders are not classified by the U S DOT or the IATA as hazardous material in the quantities used by Sea Bird Cup Cap Plug Cu Cap p CAUTION Anti foul cup
4. 3 controller applies power waits for data and then removes power Jl Only three of the four wires Power Ground and Transmit are needed for operation since it is not necessary to command the MicroCAT to take each sample Note that the MicroCAT will not respond to any commands in this configuration so initial setup of the system must be performed with all four wires in place see Operating Commands in Section 4 Deploying and Operating the MicroCAT gt Four wires With all four wires Power Ground Receive and Transmit the MicroCAT can receive and respond to most commands Note that the MicroCAT will not respond to the QS command which normally places the MicroCAT in quiescent sleep state Note See Appendix I Electronics Verify the jumper setting in one of the following ways Disassembly Reassembly for details on accessing the PCB e Remove the PCB from the housing to check the jumper setting or e Connect the MicroCAT to the computer and enter communication parameters as described in Power and Communications Test wake up the MicroCAT by clicking the Connect button on the Toolbar and then enter the QS command after the S gt prompt The response indicates whether the jumper is in the Normal or Autopower configuration gt Autopower system returns S gt prompt indicating that the MicroCAT is not in quiescent state gt Normal system does not return S gt prompt indicating that the MicroCAT is in qu
5. 425 643 9866 Fax 425 643 9954 E mail seabird seabird com Website http www seabird com Business hours Monday Friday 0800 to 1700 Pacific Standard Time 1600 to 0100 Universal Time Except from April to October when we are on summer time 1500 to 0000 Universal Time Quick Start Follow these steps to get a Quick Start using the MicroCAT The manual provides step by step details for performing each task 1 Perform pre check procedures see Section 3 Preparing the MicroCAT for Deployment A Test power and communications B Verify the power up mode jumper is correctly set by observing response to QS command 2 Deploy the MicroCAT see Section 4 Deploying and Operating the MicroCAT Set date and then time Establish setup and operating parameters Remove protective plugs from anti foul cups and verify anti foul cylinders are installed Leave protective plugs off for deployment Install I O cable connector and locking sleeve Deploy MicroCAT using optional Sea Bird mounting hardware or customer supplied hardware mo OPS Section 1 Introduction Unpacking the MicroCAT Shown below is a typical MicroCAT shipment SBE 37 SI MicroCAT Beer manual Software and Software Manuals 9 pin adapter Cell cleaning solution Triton X Spare parts kit Section 2 Description of the MicroCAT Section 2 Description of the MicroCAT This section describes the functions and features of the
6. 9 Pressure test certificate See attachments at end of manual Q Quick start 5 R Recovery 31 Replacement parts 43 S Sample timing 11 Sampling modes 21 autonomous 22 polled 21 serial line sync 23 Schematics See attachments at end of manual SEASOFT DOS 8 SEASOFT Win3 2 8 14 SEATERM 8 14 15 main screen 15 toolbar buttons 16 Sensors 9 Service information See attachment at end of manual Software 8 Software installation 14 Specifications 9 Storage 32 System description 7 T Testing 14 Timeout description 24 U Unpacking MicroCAT 6 WwW Warranty See attachment at end of manual Wiring 14
7. e Ifin quiescent sleep state re establish communications by click Connect on the Toolbar or pressing the Enter key to get an S gt prompt 24 Section 4 Deploying and Operating the MicroCAT Status Command DS Display operating status and setup parameters Equivalent to Status button on Toolbar Note If the external voltage is below 6 15 volts the following displays in response to the status command WARNING List below includes where applicable LOW BATTERY VOLTAGE command used to modify parameter e firmware version serial number date and time only if set by user MMDDYY or DDMMYY and HHMMSS e logging status e sample interval time INTERVAL e time output with each sample OUTPUTTIME e salinity output with each sample OUTPUTSAL e sound velocity output with each sample OUTPUTSV e local density output with each sample OUTPUTDENSITY e depth output with each sample OUTPUTDEPTH e Jatitude to use for depth calculation LATITUDE e start sampling when power turned on AUTORUN e power off after taking a single sample SINGLESAMPLE e power off after two minutes of inactivity AUTOOFF e A D cycles to average per sample NCYCLES e reference pressure REFPRESS e current temperature Logging status can be e logging not started e logging data e not logging received stop command e unknown status Example Display status for Micr
8. x Y calculate and output sound velocity m sec x N do not OUTPUTDEPTH x x Y calculate and output depth meters x N do not OUTPUTDENSITY x x Y calculate and output local density sigma kg m x N do not LATITUDE x x latitude degrees to use in depth calculation REFPRESS x x reference pressure gauge in decibars used for conductivity salinity and sound velocity computation when MicroCAT does not have pressure sensor FORMAT x x 0 output raw hex data for diagnostic use at Sea Bird x 1 output converted data date dd mmm yyyy x 2 output converted data date mm dd yyyy OUTPUTBINARY x x Y output data in binary form x N do not NCYCLES x x number of A D cycles to average range 1 to 127 default 4 Qs Quit session and place MicroCAT in quiescent sleep state Sampling stops Applicable only if Interface PCB J1 jumper in Normal position 40 Appendix Ill Command Summary CATEGORY COMMAND DESCRIPTION Operating INTERVAL x X interval seconds between samples 10 to 32767 Mode If x lt 10 seconds sample continuously AUTOOFF x Functional only if J1 jumper in Normal position Interface PCB s x Y Power off enter quiescent state if 2 minutes J1 jumper have elapsed without receiving a command or interacts with without sampling data these x N Do not automatical
9. Esc key is pressed output raw data Measure pressure for 100 samples or until Esc key is pressed output raw data Measure real time clock frequency for 30 samples or until Esc key is pressed output data Section 4 Deploying and Operating the MicroCAT Calibration Coefficients Commands Notes e Dates shown are when calibrations were performed Calibration coefficients are initially factory set and should agree with Calibration Certificates shipped with MicroCAT See individual Coefficient Commands below for definitions of the data in the example Note F floating point number S string with no spaces DC Display calibration coefficients Equivalent to Coefficients button on Toolbar Example Display coefficients for MicroCAT which does not have a pressure sensor S gt DC SBE37 SI V 2 2 0011 temperature 08 apr 00 TAO 9 420702e 05 TAL 2 937924e 04 TA2 3 739471e 06 TA3 1 909551e 07 conductivity 09 apr 00 1 036689e 00 1 444342e 01 3 112137e 04 3 005941e 05 CPCOR 9 570001e 08 CTCOR 3 250000e 06 WBOTC 1 968100e 05 rte 11 apr 00 RTCAO 9 999782e 01 RTCA1 1 749351e 06 RTCA2 3 497835e 08 The individual Coefficient Commands listed below are used to modify a particular coefficient or date TCALDATE S TAO F TA1 F TA2 F TA3 F CALDATE S CG F CH F CI F CJ F WBOTC F CTCOR F CPCOR F PCALDATE S PA0 F PA1 F PA2 F PTCA0
10. F PTCAI1 F PTCA2 F PTCBO F PTCB1 F PTCB2 F POFFSET F RCALDATE S RTCAO0 F RTCA1 F RTCA2 F 30 S Temperature calibration date F Temperature AO F Temperature Al F Temperature A2 F Temperature A3 S Conductivity calibration date F Conductivity G F Conductivity H F Conductivity I F Conductivity J F Conductivity wbotc F Conductivity ctcor F Conductivity cpcor S Pressure calibration date F Pressure AO F Pressure Al F Pressure A2 F Pressure ptca0 F Pressure ptcal F Pressure ptca2 F Pressure ptcb0 F Pressure ptcb1 F Pressure ptcb2 F Pressure offset S Real time clock calibration date F Real time clock AO F Real time clock Al F Real time clock A2 Section 4 Deploying and Operating the MicroCAT Data Output Formats Notes for FORMAT 1 or 2 t temperature C ITS 90 Each scan ends with a carriage return lt CR gt and line feed lt LF gt c conductivity S m p pressure decibars sent only if e FORMAT 0 raw hex data intended only for diagnostic use at Sea Bird optional pressure sensor installed d depth meters sent only if e FORMAT 1 default OUTPUTDEPTH Y S Salinity psu sent only if OUTPUTSAL Y v sound velocity meters second ttt tttt cc ccccc pppp ppp dddd ddd sss ssss vvvv vvy rrr rrrr dd mmm yyyy hh mm ss Leading zeros are suppressed except for one zero to the left of the sent only if OUTPUTSV Y decimal point r density sigma kg m sent only if OUT
11. H were CI F F Conductivity I performed CJ F F Conductivity J Calibration WBOTC F F Conductivity wbotc coefficients CTCOR F F Conductivity ctcor are initially CPCOR F F Conductivity cpcor factory set PCALDATE S S Pressure calibration date and should PAO0 F F Pressure AO agree with PA1 F F Pressure A1 Calibration PA2 F F Pressure A2 Certificates PTCAO0 F F Pressure ptca0 ship ped with PTCA1 F F Pressure ptcal MicroCATs PTCA2 F F Pressure ptca2 PTCBO F F Pressure ptcb0 PTCB1 F F Pressure ptcb1 PTCB2 F F Pressure ptcb2 POFFSET F F Pressure offset RCALDATE S S Real time clock calibration date RTCA0 F F Real time clock AO RTCA1 F F Real time clock A1 RTCA2 F F Real time clock A2 42 Appendix IV Replacement Parts Appendix IV Replacement Parts Part RA oi Quantity in Number Part Application Description MicroCAT 24173 Anti foul cylinder Anti foul poison tubes 2 inserted into anti foul cups 231070 Anti foul cup Holds anti foul cylinder 2 231505 Anti foul cap Secures anti foul cylinder in 2 cup 30984 Anti foul plug Seals end of anti foul 2 assembly when not deployed 30859 Machine screw 8 32 x Secures housing to I O 5 3 3 FH PH titanium connector end cap 2 housing to sensor end cap 1 and guard to sensor end cap 2 30544 Machine screw 8 32 x Secures guard to sensor end 2 1 2 FH PH titanium cap through holes that also secure housi
12. Prepare for deployment or e If being stored drain and gently blow dry and replace the protective plugs in the anti foul cups 32 Section 5 Routine Maintenance and Calibration Acid Cleaning visible deposits or marine growth on inside of cell Do not clean with acid more than once per week CAUTION Anti foul cups are attached to the guard and connecting with tubing to the cell Removing the guard without disconnecting the cups from the guard will break the cell WARNING Avoid breathing the acid fumes 1 Remove the MicroCAT guard A B C Remove the two screws attaching each anti foul cup to the guard Remove the four Phillips head screws attaching the guard to the housing and sensor end cap Gently lift the guard away Prepare for cleaning A B C D Remove the small section of Tygon tubing and anti foul cup from one end of the cell Place a 0 6 m 2 ft length of 7 16 inch ID 9 16 inch OD Tygon tubing over the end of the cell Clamp the MicroCAT so that the cell is vertical with the 0 6 m 2 ft Tygon tubing at the bottom end Loop the Tygon tubing into a U shape and tape the open end of the tubing in place at the same height as the top of the glass cell Clean the cell A w a e mm Pour muriatic acid 37 HCl into the open end of the tubing until the cell is nearly filled Let it soak for 1 to 2 minutes only Drain the acid from t
13. be necessary to rock or twist the end cap back and forth or use a non marring tool on the edge of the cap to loosen it D The end cap is electrically connected to the electronics with a 4 pin Molex connector Holding the wire cluster near the connector pull gently to detach the female end of the connector from the pins E Remove any water from the O ring mating surfaces inside the housing with a lint free cloth or tissue F Put the end cap aside being careful to protect the O rings from damage or contamination Molex connector 2 Remove the housing from the electronics A Wipe the outside of the sensor end cap and housing dry being careful to remove any water at the seam between them B Remove the two flat Phillips head titanium machine screws connecting the guard to the housing and sensor end cap Do not remove any other screws from the guard C Remove the flat Phillips head titanium machine screw connecting the housing to the sensor end cap D Remove the housing by pulling it out firmly and steadily It may be necessary to twist or rock the housing back and forth to loosen it Screws securing sensor end cap shown partially removed 3 The electronics are on a sandwich of three rectangular PCBs These PCBs are assembled to a bulkhead To remove the PCB assembly A Remove the Phillips head screw on the bulkhead that fits inside the small diameter brass sleeve The Phillips head screw is a 198 mm 7 8 inch thread
14. cable connector aligning the raised bump on the side of the connector with the large pin pin 1 ground on the MicroCAT Remove any trapped air by burping or gently squeezing the connector near the top and moving your fingers toward the end cap C Place the locking sleeve over the connector Tighten the locking sleeve finger tight only Do not overtighten the locking sleeve and do not use a wrench or pliers I O cable connector Locking sleeve g 4 Attach the mounting equipment to the mooring cable or support 5 Verify that the hardware and external fittings are secure 6 Connect the MicroCAT to the computer and power supply See Power and Communications Test in Section 3 Preparing the MicroCAT for Deployment 20 Section 4 Deploying and Operating the MicroCAT Sampling Modes The MicroCAT has four basic sampling modes for obtaining data on temperature conductivity and optional pressure salinity and sound velocity Polled Sampling Autonomous Sampling Interval Autonomous Sampling Continuous and Serial Line Synchronization Sampling However commands and the J1 jumper setting on the Interface PCB can be used in various combinations to provide a high degree of operating flexibility Shown below are descriptions and examples of the four basic sampling modes Note that the MicroCAT s response to each command is not shown in the examples Review the operation of the basic sampling modes and the commands de
15. free of pressure hysteresis Compensation of the temperature influence on pressure offset and scale is performed by the SBE MicroCAT s CPU Section 2 Description of the MicroCAT Notes The MicroCAT is supplied with a Win 95 98 NT software package e See SEATERM s help files for SEASOFT Win32 SEASOFT Win32 includes SEATERM a powerful detailed information on the use terminal program for easy communication and data retrieval SEATERM can of the program send commands to the MicroCAT to provide status display data acquisition Sea Bird also supplies a setup data display and capture and diagnostic tests Note that SEATERM DOS software package does not process the data SEASOFT DOS that can be used with the MicroCAT However this manual details only the use of the Windows software with the MicroCAT A separate software manual on CD ROM contains detailed information on the setup and use of SEASOFT DOS Section 2 Description of the MicroCAT Specifications Note Pressure ranges are expressed in meters of deployment depth capability Temperature Conductivity Optional C S m Pressure Measurement 5 to 35 Oto7 0 to full scale range Range 0 to 70 mS cm 20 100 350 1000 2000 3500 7000 meters Initial Accuracy 0 002 0 0003 0 1 of full scale 0 003 mS cm range Typical Stability 0 0002 0 0003 0 004 of full scale per month 0 003 mS cm range Resolution 0 0001 0 00001 0 002
16. have fully seated Reinstall the three flat Phillips head screws that connect the housing to the sensor end cap and the guard 3 Reinstall the I O connector end cap on the housing A Remove any water from the I O connector end cap s O rings and mating surfaces in the housing with a lint free cloth or tissue Inspect the O rings and mating surfaces for dirt nicks and cuts Clean as necessary Apply a light coat of O ring lubricant Parker Super O Lube to the O rings and mating surfaces Carefully fit the end cap into the housing until the O rings have fully seated Reinstall the two flat Phillips head screws that connect the end cap to the housing 39 A endix IIl Command Summar Appendix Ill Command Summary Note See Command Descriptions in Section 4 Deploying and Operating the MicroCAT for detailed information and examples CATEGORY COMMAND DESCRIPTION Status DS Display status Setup MMDDYY mmddyy _ Set real time clock month day year Follow with HHMMSS or it will not set date DDMMYY ddmmyy Set real time clock day month year Follow with HHMMSS or it will not set date HHMMSS hhmmss Set real time clock hour minute second BAUD x x baud rate 1200 2400 4800 9600 19200 or 38400 Default 9600 OUTPUTTIME x x Y output date and time x N do not OUTPUTSAL x x Y calculate and output salinity psu x N do not OUTPUTSV x
17. instrument s response Additionally a command can be manually typed in this area from the available commands for the instrument Note that the instrument must be awake for it to respond to a command use the Connect button on the Toolbar to wake up the instrument e Status bar Provides status information To display or hide the Status bar select View Status bar in the View menu 15 Following are the Toolbar buttons applicable to the MicroCAT Section 3 Preparing the MicroCAT for Deployment Toolbar Buttons Description Equivalent Command Connect Re establish communications with MicroCAT Computer responds with S gt prompt MicroCAT goes to Sleep after two minutes without communication from computer have elapsed press Enter key Status Display instrument setup and logging status DS Coefficients Display calibration coefficients DC Capture Capture instrument responses on screen to file As MicroCAT has no internal memory you must capture before sampling begins to save data for future review and processing File has cap extension Press Capture again to turn off capture Capture status displays in Status bar Diagnostics Perform one or more diagnostic tests on MicroCAT Diagnostic test s accessed in this manner are non destructive they do not write over any existing instrument settings DS DC TS and TSR Disconnect Free computer COM port used
18. new time ihe new date will nok be sayed configure the MicroCAT s response upon waking up and direct the MicroCAT to sample data once or at pre programmed intervals 19 Section 4 Deploying and Operating the MicroCAT Deployment The MicroCAT can be mounted with customer supplied hardware or can be ordered with pre installed Sea Bird mounting brackets 1 Install customer supplied mounting equipment if Sea Bird mounting clamp and guide or brackets are not pre installed Sea Bird A Install a mounting bracket that attaches to the tapped holes in the mounting MicroCAT sensor end cap Use titanium hardware to attach the ee clamp and mounting bracket to the MicroCAT and place non metallic material Pa SA Hak between the titanium housing and any dissimilar metal in the bracket mounting Do not drill any holes in the MicroCAT brackets B Ensure the mounting scheme does not transfer mooring through tension to the sensor end cap which could pull off the end cap Remove 2 Remove the protective plugs if installed from the anti foul cups plugs 2 Verify that the two plastic cups contain anti foul cylinders see Section 5 Routine Maintenance and Calibration for anti foul cylinder replacement Leave the protective plugs off for deployment Cups 2 3 Install the I O cable on the MicroCAT A Lightly lubricate the inside of the cable connector with silicone grease DC 4 or equivalent B Install the
19. on Toolbar to wake up S gt SINGLESAMPLE Y S gt AUTORUN Y S gt OUTPUTTIME Y S gt QS When ready to take a sample repeat as desired Click Capture on Toolbar to capture data to a file program requests file name for data to be stored Press Enter key to wake up sample and power off When ready to stop sampling or change operation Press Enter key several times to get S gt prompt S gt STOP S gt Enter desired commands 23 Section 4 Deploying and Operating the MicroCAT Timeout Description The MicroCAT has a timeout algorithm when jumpered in the Normal configuration Interface PCB J1 pins 1 and 2 If the MicroCAT does not receive a command or sample data for two minutes and AUTOFF Y it powers down its communication circuits This places the MicroCAT in quiescent state drawing minimal current To re establish control wake up click Connect on the Toolbar or press the Enter key The system responds with the S gt prompt Command Descriptions This section describes commands and provides sample outputs See Appendix III Command Summary for a summarized command list When entering commands e Input commands to the MicroCAT in upper or lower case letters and register commands by pressing the Enter key e The MicroCAT sends CMD if an invalid command is entered e Ifthe system does not return an S gt prompt after executing a command press the Enter key twice to get the S gt prompt
20. the MicroCAT are supplied fully calibrated with coefficients printed on their respective Calibration Certificates see back of manual These coefficients have been stored in the MicroCAT s EEPROM We recommend that MicroCATs be returned to Sea Bird for calibration 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 outputs 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 Fouling changes the cell geometry resulting in a shift in cell constant Accordingly the most important determinant of long term sensor accuracy is the cleanliness of the cell We recommend that the conductivity sensors be calibrated before and after deployment but particularly when the cell has been exposed to contamination by oil slicks or biological material Temperature Sensor Calibration The primary source of temperature sensor calibration drift is the aging of the thermistor element Sensor drift will usually be a few thousandths of a degree during the first year and less in subsequent intervals Sensor drift is not substantially dependent upon the environmental conditions of use and
21. to automatically generate a command Note Once the system is configured and connected Steps 3 and 4 below to update the Status bar e onthe Toolbar click Status or e from the Utilities menu select Instrument Status SEATERM sends the status command which displays in the Command Data Echo Area and updates the Status bar Test Proceed as follows 1 Double click on SeaTerm exe If this is the first time the program is used the setup dialog box appears The oonliguration file SeaT em chg wer wot found in the applecation path Pitara enter the Inlloeing spelups and onialaaen IMPORTANT To complete setup be selecting i mera ligt Inshunert Type IEE COM Pon fi Select the instrument type SBE 37 and the computer COM port for communication with the MicroCAT Click OK 2 The main screen looks like this Toolbar Command Data Echo Area Capture Status bar to file status grayed Upload out if not parameter capturing e Menus Contains tasks and frequently executed instrument commands e Toolbar Contains buttons for frequently executed tasks and instrument commands All tasks and commands accessed through the Toolbar are also available in the Menus To display or hide the Toolbar select View Toolbar in the View menu Grayed out Toolbar buttons are not applicable e Command Data Echo Area Echoes a command executed using a Menu or Toolbar button as well as the
22. AT to go to sleep quiescent state by typing QS and pressing the Enter key The response indicates whether the Interface PCB s J1 jumper is in the Normal or Autopower configuration e Autopower system returns S gt prompt e Normal system does not return S gt prompt If necessary remove the PCB and move the jumper to the desired pins See Power Up Jumper Check for a description of the configurations and the pin settings and Appendix I ElectronicsDisassembly Reassembly for directions on accessing the PCB The MicroCAT is ready for programming and deployment 18 Section 4 Deploying and Operating the MicroCAT Section 4 Deploying and Operating the MicroCAT This section provides instructions for deploying the MicroCAT It also includes a discussion of system operation example sets of operation commands and detailed command descriptions Set Up for Deployment Program the MicroCAT for the intended deployment see Section 3 Preparing the MicroCAT for Deployment for connection information see information in Notes this section on commands and sampling modes e Date is reset to 01 Jan 1980 when power is applied If you wish to use 1 Set the date and then time the built in real time clock set the date and time 2 Establish the setup parameters e It is always necessary to set both date and then time If a new date 3 Establish the logging operating command parameters These parameters is entered but not a
23. CYCLES 0 1350 0 53 e With pressure time seconds NCYCLES 0 1675 0 84 Serial Line Sync Power on time e Without pressure time seconds NCYCLES 0 135 1 66 e With pressure time seconds NCYCLES 0 165 2 00 The data is sent approximately 60 milliseconds before power off 11 Section 3 Preparing the MicroCAT for Deployment Section 3 Preparing the MicroCAT for Deployment This section describes the pre check procedure for preparing the MicroCAT for deployment Checking the power up mode jumper checking anti foul material and testing power and communications are discussed Power Up Jumper Check a The Interface Printed Circuit Board PCB has a jumper that controls how the MicroCAT wakes up e Jumper set for Normal default The MicroCAT powers up wakes up 102004 ao d 1020 when there is a pulse on the serial interface lines In this configuration the Interface PCB MicroCAT can be controlled using the documented commands and can be commanded into a quiescent sleep state with the QS command 1 ie Pin position on J1 e Normal default e Jumper set for Autopower The MicroCAT wakes up when 2 pins 1 and 2 power is applied System capability is dependent on the operating s ho hie 4 wiring configuration fea gt Three wires This configuration is useful in simple systems where a
24. E EET AERES 37 Sensor Interface ieie a rE TEE Ei E AE E a ET E EEEa 37 Appendix II Electronics Disassembly Reassembly sssssssscssssseseees 38 Disassembly nion a fh dedpuaes signee epee bea TE SaS TESE 38 REaSSemb y aitase eea e aar Soken apenra e e ESR ENEH EREN 39 Appendix I Command Summary essesesseseosoesessossessossesossesoossesoessssessosses 40 Appendix IV Replacement Parts e seesesoosseseosoesessossesoossesoosoesossesoessesessossee 43 IET S EER EAS A PETEA E EER RTT H Warranty Policy Service Information Calibration Certificates Pressure Test Certificate Application Notes Schematics Section 1 Introduction Section 1 Introduction This section includes contact information Quick Start procedure and photos of a standard MicroCAT shipment About this Manual This manual is to be used with the SBE 37 SI MicroCAT Conductivity and Temperature Monitor pressure optional It is organized to guide the user from installation through operation and data collection We ve included detailed specifications command descriptions maintenance and calibration information and helpful notes throughout the manual Sea Bird welcomes suggestions for new features and enhancements of our products and or documentation Please e mail any comments or suggestions to seabird seabird com How to Contact Sea Bird Sea Bird Electronics Inc 1808 136 Place Northeast Bellevue Washington 98005 USA Telephone
25. IME OUTPUTSAL OUTPUTSV OUTPUTDEPTH or OUTPUTDENSITY Binary data does not output on the screen Use the Capture button on the Toolbar to capture the data to a file before beginning sampling and then process the data with a utility FORMAT x OUTPUTBINARY x NCYCLES x QS 27 x 0 output raw hex data for diagnostic use at Sea Bird x 1 default output converted data ttt tttt cc ccccc pppp ppp dddd ddd SSS SSSS VVVV VVV rrr rrrr dd mmm yyyy hh mm ss x 2 output converted data ttt tttt cc ccccc pppp ppp dddd ddd SSS SSSS VVVV VVV rrr rrrr mm dd yyyy hh mm ss where t temperature C ITS 90 c conductivity Siemens meter p pressure decibars sent only if optional pressure sensor is installed d depth meters sent only if OUTPUTDEPTH Y s salinity psu sent only if OUTPUTSAL Y v sound velocity meters second sent only if OUTPUTSV Y r density sigma kg m sent only if OUTPUTDENSITY Y dd mmm yyyy day month year sent only if OUTPUTTIME Y mm_ dd yyyy month day year sent only if OUTPUTTIME Y hh mm ss hour minute second sent only if OUTPUTTIME Y x Y output converted data in binary form ttttecccpppph where tttt temperature 100000 ccce conductivity 100000 pppp pressure 100000 sent only if optional pressure sensor is installed h 1 byte checksum sum of all bytes including checksum modulo 256 is 0 Note that tttt cccc a
26. PUTDENSITY Y e FORMAT 2 dd mmm yyyy day month year sent ttt tttt cc ccccc pppp ppp dddd ddd sss ssss vvvv vvwvy rrr rrrr only if OUTPUTTIME Y mm dd yyyy hh mm ss mm dd yyyy month day year data Leading zeros are suppressed except for one zero to the left of the only if OUTPUTTIME Y decimal point hh mm ss hour minute second sent only if OUTPUTTIME Y e There is a comma but no space Example Sample data output when pressure sensor is installed conductivity All other data is OUTPUTDENSITY N OUTPUTTIME Y and FORMAT 1 separated with a comma and space 23 7658 0 00019 0 062 26 May 2000 16 30 43 e The MicroCAT s pressure sensor is temperature conductivity pressure date time an absolute sensor so its raw output includes the effect of atmospheric pressure 14 7 psi As shown on the Calibration Sheet Sea Bird s calibration and resulting calibration coefficients is in terms of psia However when outputting pressure in decibars the MicroCAT outputs pressure relative to the ocean surface i e at the surface the output pressure is 0 decibars The MicroCAT uses the following equation to convert psia to decibars pressure db pressure psia 14 7 0 689476 Recovery WARNING 1 Pressure housings may flood under pressure due to dirty or damaged o rings or other failed seals causing highly compressed air to be trapped inside If this happens a potentially li
27. SBE 37 SI MicroCAT Conductivity and Temperature Monitor with RS 232 Interface User s Manual Sea Bird Electronics Inc 1808 136 Place NE Bellevue Washington 98005 USA Tel 425 643 9866 Manual Version 013 02 26 02 Fax 425 643 9954 Firmware Version 2 2 and later Limited Liability Statement Extreme care should be exercised when using or servicing this equipment It should be used or serviced only by personnel with knowledge of and training in the use and maintenance of oceanographic electronic equipment 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 Therefore acceptance of this system by the customer shall be conclusively deemed to include a covenant by the customer to defend indemnify and hold SEA BIRD ELECTRONICS INC harmless from all product liability claims arising from the use or servicing of this system Table of Contents Table of Contents Section 1 Introduction iseis onransa nen iE 5 About this Manual ses anean iiin iieiea e a e S 5 How to Contact Sea Bird ioner iieii E AE E T E S QUICK S tart EEEE E S EE T beeen 5 Unpacking the Mi
28. SBE 37 SI MicroCAT including specifications and dimensions System Description The SBE 37 SI MicroCAT is a high accuracy externally powered conductivity and temperature pressure optional monitor which includes a standard serial interface Designed to be incorporated into oceanographic sensing systems MicroCATs have non corroding titanium housings rated for operation to 7000 meters 23 000 feet or pressure sensor full scale range Communication with the MicroCAT is over an internal 3 wire RS 232C link Over 50 different commands can be sent to the MicroCAT to provide status display data acquisition setup data retrieval and diagnostic tests User selectable operating modes include e Autonomous sampling There are two types of Autonomous sampling Interval sampling At pre programmed intervals the MicroCAT wakes up samples transmits the data and powers off Continuous sampling The MicroCAT continuously samples and sends the data to the computer and does not power off between samples e Polled sampling On command the MicroCAT takes one sample and transmits the data Polled sampling is useful for integrating the MicroCAT with satellite radio or wire telemetry equipment e Serial line sync A pulse on the serial line causes a MicroCAT to wake up sample transmit the data and power off automatically This mode provides easy integration with Acoustic Doppler Current Profilers ADCPs or current meters which can s
29. al time data acquisition and data analysis and display SEASOFT Win32 includes SEATERM SeatermAF SEASAVE SBE Data Processing and Plot39 SEATERM Sea Bird s WIN 95 98 NT software used to communicate with the MicroCAT TCXO Temperature Compensated Crystal Oscillator Triton X100 Concentrated liquid non ionic detergent used for cleaning the conductivity cell 36 Appendix Functional Description Appendix l Functional Description Sensors Note Pressure ranges are expressed in meters of deployment depth capability The MicroCAT embodies the same sensor elements 3 electrode 2 terminal borosilicate glass cell and pressure protected thermistor previously employed in Sea Bird s modular SBE 3 and SBE 4 sensors and in Sea Bird s SEACAT family The MicroCAT s optional pressure sensor developed by Druck Inc has a superior new design that is entirely different from conventional silicon types in which the deflection of a metallic diaphragm is detected by epoxy bonded silicon strain gauges The Druck sensor employs a micro machined silicon diaphragm into which the strain elements are implanted using semiconductor fabrication techniques Unlike metal diaphragms silicon s crystal structure is perfectly elastic so the sensor is essentially free of pressure hysteresis Compensation of the temperature influence on pressure offset and scale is performed by the MicroCAT s CPU The pressure sensor
30. ameter O O 4 places 292 1 11 50 Guide 19 0 0 75 rT 87 6 108 0 3 45 4 25 o Standard Without Optional Wire Mounting Optional Flat Surface Mounting Hardware Clamp and Guide Mounting Brackets End Cap Connector The MicroCAT comes standard with a 4 pin XSG type connector An optional MCBH wet pluggable connector is available PE EREA i O standard XSG connector Ki 3 2 s i 0 __ optional MCBH connector se Optional 4 Pin Connector Pin Signal 1 Common 2 RS 232 data receive 3 RS 232 data transmit 4 7 24 VDC 10 Section 2 Description of the MicroCAT Sample Timing Notes See Section 4 Deploying and Operating the MicroCAT for a description of commands Autonomous Sampling is in effect when gt Interface PCB J1 jumper is set to Normal or Autopower and gt AUTORUN YES and SINGLESAMPLE NO Polled Sampling is in effect when gt Interface PCB J1 jumper is set to Normal or Autopower and gt AUTORUN NO Serial Line Sync is in effect when gt Interface PCB J1 jumper is set to Normal pins 1 and 2 and gt AUTORUN YES and SINGLESAMPLE YES Autonomous Sampling If INTERVAL lt 10 continuous sampling e Without pressure time between samples seconds NCYCLES 0 1336 0 52 e With pressure time between samples seconds NCYCLES 0 1664 0 75 If NCYCLES is large the time required to sample may be more than INTERVAL The MicroCAT w
31. ap onto the cup Do not over tighten 6 Ifthe MicroCAT is to be stored re install the protective plug Note that the plugs must be removed prior to deployment or pressurization If the plugs are left in place during deployment the cell will not register conductivity If left in place during pressurization the cell may be destroyed 35 Glossar Glossary Anti foul cylinders Expendable devices saturated with a tri butyl tin based toxin placed inside the anti foul cups located at the ends of the conductivity cell Fouling Biological growth in the conductivity cell during deployment MicroCAT High accuracy conductivity temperature and optional pressure Recorder Monitor Three models are available SBE 37 IM Inductive Modem with internal battery and memory SBE 37 SM Serial interface with internal battery and Memory and SBE 37 SI Serial Interface only The SBE 37 SM and 37 SI are available with RS 232 or RS 485 interface PCB Printed Circuit Board Scan One data sample containing temperature conductivity optional pressure and optional date and time as well as derived variables depth salinity sound velocity and density SEASOFT DOS Sea Bird s complete DOS software package which includes software for communication real time data acquisition and data analysis and display SEASOFT Win32 Sea Bird s complete Win 95 98 NT software package which includes software for communication re
32. croCA Tias e Ruan aia oka ate 6 Section 2 Description of the MicrOCA T e sessessesessessesoosoesessossesoesessossesosssese 7 System Description s seach cece a ee ie ei 7 Specifications ric sesnc secoesetsesesauies Setens destescousieet osnesk Series etoetneens SEEI EE rae iadesi 9 DIMENSIONS oa enean Sek n centile ovacie NE EE EE E E a 10 Sample TIMIN eia Biss ihe eae ee E E aon ool O E EEES 11 Autonomous Sampling s eseeeesserseeesssrrerrseesrrserrreesrreresrenrssrerreserrrnresrent 11 Polled Sampling sinine enaa o EEE ESE a E ee out E 11 Serial Fine Syne e Aiea cask ie K E EET E E AEE oe cone 11 Section 3 Preparing the MicroCAT for Deployment sscscsssseees 12 Power Up Jumper Check beesie i reee eeen e re pi En ea 12 Anti Foul Material Check 00 eecceesssceseeecsseceeneecaeceeeecaeceeaeecaeeeeneecsaeeeeneeee 13 Power and Communications Test cecseecceesceceseceeeeeceeeeeeeeceaeeeeeeecsaeeeeneeees 14 Test Set UP n e send ek lia eigen ee legen E 14 LOS tskeaisecee iiss sesh ope eeati ek seek aia eek Sep a handed bo ea evel Cee ed Renae 15 Section 4 Deploying and Operating the MicroCAT ssecsssessssesrees 19 Set Up for Deployment ssecsse sce enir orei esn i ese EE EES 19 Deployment ein iee raa eE ir E N E E E EEEE S T EE 20 Sampling Modessa E EE E rE rE a EESE 21 Polled Sampling Sampling commands sseseseeesseeeeseeerereresererrsreerssen 21 Autonomous Sampling Operating commands e
33. d date and time with data Send power off command to MicroCAT after all parameters are entered system automatically wakes up and powers down for each sample Click Connect on Toolbar to wake up S gt SINGLESAMPLE N S gt INTERVAL 20 S gt OUTPUTTIME Y S gt AUTORUN Y S gt QS When ready to begin sampling Click Capture on Toolbar to capture data to a file program requests file name for data to be stored Apply power to wake up MicroCAT automatically begins sampling When ready to stop sampling Remove power 22 Section 4 Deploying and Operating the MicroCAT Serial Line Synchronization Serial Line Sync In Serial Line Sync Mode a simple pulse a single character on the RS 232 line causes the MicroCAT to wake up take and output a single sample and automatically power off enter quiescent state This mode provides easy integration with ADCPs or current meters which can synchronize MicroCAT sampling with their own This mode is enabled if AUTORUN Y SINGLESAMPLE yY and the Interface PCB s J1 jumper is in the Normal position Example Serial Line Sync Interface PCB J1 jumper in Normal position Set up to take a sample upon receipt of any character and then automatically power off Send date and time with data Send power off command to MicroCAT after all parameters are entered system automatically wakes up and powers down for each sample upon receipt of a character Click Connect
34. e MicroCAT with water in the conductivity cell Freezing temperatures for example in Arctic environments or during air shipment can break the conductivity cell if it is full of water Routine Rinsing after Recovery After each recovery rinse the cell with clean de ionized water drain and gently blow dry and re insert the protective plugs in the anti foul cups If the cell is not rinsed between usage salt crystals may form on the platinized electrode surfaces When the instrument is used next sensor accuracy may be temporarily affected until these crystals dissolve Cleaning Cell cleaning removes foreign material coating the inside of the cell partially CAUTION restoring the cell to the original factory calibration Decide whether to clean Do not put a brush or any object the cell after a deployment based on the following inside the conductivity cell to clean it Putting an object inside the cell Can damage and break thecal e Do not clean the cell if you will be sending the MicroCAT to Sea Bird for a post cruise calibration to establish the drift during the cruise e Clean the cell if you will not be performing a post cruise calibration to establish the drift Routine Cleaning inside of cell not visibly dirty 1 Fill the cell with a 1 solution of Triton X 100 included with shipment and let it soak for 30 minutes 2 Drain and flush with warm clean de ionized water for 1 minute Then e
35. ed rod with Phillips head B Pull out the PCB assembly by carefully grasping the bulkhead and pulling The assembly will pull away from the 10 position edge Brass connector used to connect to the cells sleeve Screw securing electronics Bulkhead 38 Appendix Il Electronics Disassembly Reassembly Reassembly _ Align brass sleeve with Note If the rod will not tighten the PCBs have not fully mated or are mated in reverse Note Before delivery desiccant packages are attached to the PCBs with string and the electronics chamber is filled with dry Argon These measures help prevent condensation If the electronics are exposed to the atmosphere dry gas backfill with Argon If the exposure is for more than 12 hours also replace the desiccant package 1 Reinstall the electronics A B Align the brass sleeve with the hole for the Phillips head screw and push the PCB assembly into the 10 position edge connector Drop the Phillips head screw into the hole and tighten gently Reinstall the housing on the sensor end cap A Remove any water from the sensor end cap s O rings and mating surfaces in the housing with a lint free cloth or tissue Inspect the O rings and mating surfaces for dirt nicks and cuts Clean as necessary Apply a light coat of O ring lubricant Parker Super O Lube to the O rings and mating surfaces Carefully fit the housing onto the sensor end cap until the O rings
36. ee eeeeeeeeeeeeeeeeees 22 Serial Line Synchronization Serial Line Sync ee eeeeeeeeeeeeeees 23 Timeout Description econ e on tes secevengevetaescavepnsesecttvveceventvesnoensedenve 24 Command Descriptions 0 0 0 eee cee cseeseeeeeeeeeeeeeeeeeeeeesecsecsaecsaecsaecseeeaeeeneeegs 24 Data Output Format 20 ceeeeeeeceeeeeeceseeeseeecesecaecsaecsaecsaesseeeaeeeneeeas 31 RECOVERY n pi einen SH inte ee gin aie otto 31 Section 5 Routine Maintenance and Calibration cssesssssssssssrees 32 Corrosion Precautions ci inari a a aeaa RAOT a EA Eagas 32 Conductivity Cell Maintenance isisisi risscsies ssi sssiiot s vesrorssssse res tesoros 32 Routine Rinsing after Recovery s seessesesssreesesreesesrsrreresreerrsrerrssesrrsresrene 32 Clen anise sees ics soos a araa E a ea OE E SETE SEESE E EREE SEE EPERE REE ois 32 Sensor Calibration iiie n aaeeea a E E EEEE ARESE AAEE 34 Conductivity Sensor Calibration essssseseseeesesreeesrserererreessrerrsserrreresrese 34 Temperature Sensor Calibration seseeseeessssreeresrsererrsreeresrerrsserrreresrese 34 Pressure Sensor optional Calibration ssseesseeeeeessesseeessesrserrsrrssrrssees 34 Replacing Anti Foul Cylinders s essesseseeeseeeseseesssteerssrsreerrsreerssrrernserresresreet 35 E ESE TA EREE E EET E ELET 36 Table of Contents Appendix I Functional Description sscssccsssscssssscescssesesscsesssessssneeees 37 SEMSOTS y e e EE E E E E AEE E
37. fe threatening explosion can occur when the instrument is brought to the surface If the MicroCAT is unresponsive to commands or shows other signs of flooding or damage carefully secure the instrument in a location away from people until it has been determined that abnormal internal pressure does not exist Contact Sea Bird for assistance with procedures for safely relieving internal pressure Rinse the conductivity cell with fresh water See Section 5 Routine Maintenance and Calibration for cell cleaning and storage 2 Reinsert the protective plugs in the anti foul cups 31 Section 5 Routine Maintenance and Calibration Section 5 Routine Maintenance and Calibration This section reviews corrosion precautions cell storage sensor calibration and replacement of anti foul cylinders The accuracy of the MicroCAT is sustained by the care and calibration of the conductivity sensor and by establishing proper handling practices Corrosion Precautions All exposed metal is titanium other materials are plastic No corrosion precautions are required but direct electrical connection of the MicroCAT housing to mooring or other dissimilar metal hardware should be avoided Rinse the MicroCAT with fresh water after use and prior to storage Conductivity Cell Maintenance The MicroCAT s conductivity cell is shipped dry to prevent freezing in CAUTION shipping and depletion of the anti foul cylinders Do not store th
38. he cell and flush for 5 minutes with warm not hot clean de ionized water Rinse the exterior of the instrument to remove any spilled acid from the surface Fill the cell with a 1 solution of Triton X 100 included with shipment and let it stand for 5 minutes Drain and flush with warm clean de ionized water for 1 minute Carefully remove the 0 6 m 2 ft length of Tygon tubing Reinstall the anti foul cup and the guard A gaw Carefully reinstall the small section of Tygon tubing and anti foul cup on the end of the glass cell Carefully place the guard over the housing aligning all holes Reinstall the two screws attaching each anti foul cup to the guard Reinstall the four Phillips head screws attaching the guard to the housing and sensor end cap Prepare for deployment or If being stored gently blow dry and replace the protective plugs in the anti foul cups 33 Sensor Calibration Note Please remove anti foul cylinders from the anti foul cups before returning the MicroCAT to Sea Bird Store them for future use See Replacing Anti Foul Cylinders for the cylinder removal procedure Section 5 Routine Maintenance and Calibration Sea Bird sensors are calibrated by subjecting them to known physical conditions and measuring the sensor responses Coefficients are then computed which may be used with appropriate algorithms to obtain engineering units The conductivity and temperature sensors on
39. held converted data from RAM programmed SB Send held converted data from RAM in binary form intervals Only applicable if OUTPUTBINARY Y 41 Appendix Ill Command Summary CATEGORY COMMAND DESCRIPTION Testing TT Measure temperature for 100 samples or until Esc key is pressed output converted data TC Measure conductivity for 100 samples or until Esc key is pressed output converted data TP Measure pressure for 100 samples or until Esc key is pressed output converted data TTR Measure temperature for 100 samples or until Esc key is pressed output raw data TCR Measure conductivity for 100 samples or until Esc key is pressed output raw data TPR Measure pressure for 100 samples or until Esc key is pressed output raw data TR Measure real time clock frequency for 30 samples or until Esc key is pressed output data Coefficients DC Display calibration coefficients all coefficients and F floating dates listed below are included in display Use point number individual commands below to modify a particular S string with coefficient or date i ee spaces TCALDATE S S Temperature calibration date TAO F F Temperature AO TAI F F Temperature A1 TA2 F F Temperature A2 TA3 F F Temperature A3 Dates shown CCALDATE S S Conductivity calibration date are when CG F F Conductivity G calibrations CH F F Conductivity
40. iescent state 12 Section 3 Preparing the MicroCAT for Deployment Anti Foul Material Check New MicroCATs are shipped with anti foul cylinders and protective plugs pre installed Verify that the cylinders are in the anti foul cups See Section 5 Routine Maintenance and Calibration for details on Antion replacing the anti foul cylinders cylinder The protective plugs must be removed prior to deployment or pressurization If the plugs are left in place during deployment the sensor will not register conductivity If left in place during pressurization the cell may be destroyed Protective plug Plug 13 Section 3 Preparing the MicroCAT for Deployment Power and Communications Test The power and communications test will verify that the system works prior to deployment Test Set Up Note 1 If not already installed install SEATERM and other Sea Bird software It is possible to use the MicroCAT programs on your computer using the supplied software CD without SEATERM by sending A Insert the CD in your CD drive direct commands from a dumb B Double click on Seasoft Win32 exe terminal or terminal emulator such C Follow the dialog box directions to install the software as Windows HyperTerminal The default location for the software is c Program Files Sea Bird Within that folder is a sub directory for each program 2 By hand unscrew the locking sleeve from the MicroCAT s bulkhead connect
41. ill sample continuously at the rate based on NCYCLES If INTERVAL gt 10 go to sleep between samples e With or without pressure time between samples seconds INTERVAL However if NCYCLES is large the time required to take a sample may be more than INTERVAL see continuous sampling equations above The MicroCAT will internally set the sampling rate to INTERVAL plus the actual required sampling time Example 1 INTERVAL 8 continuous sampling NCYCLES 32 MicroCAT has pressure sensor Time between samples 32 0 1664 0 75 6 0748 MicroCAT will sample continuously at 6 0748 second intervals Example 2 INTERVAL 8 continuous sampling NCYCLES 64 MicroCAT has pressure sensor Time between samples 64 0 1664 0 75 11 3996 MicroCAT will sample continuously at 11 3996 second intervals Example 3 INTERVAL 11 go to sleep between samples NCYCLES 32 MicroCAT has pressure sensor Time between samples 32 0 1664 0 75 6 0748 lt 11 MicroCAT will sample at 11 second intervals going to sleep between samples Example 4 INTERVAL 11 go to sleep between samples NCYCLES 64 MicroCAT has pressure sensor Time between samples 64 0 1664 0 75 11 3996 gt 11 MicroCAT will sample at 11 3996 11 21 3996 second intervals going to sleep between intervals Polled Sampling Time from end of take or send sample command to beginning of reply e Without pressure time seconds N
42. in Normal position x Y Automatically power off enter quiescent state if 2 minutes have elapsed without receiving a command or without sampling data x N Do not automatically power off x Y or N This command interacts with SINGLESAMPLE and J1 jumper setting as described in table below x N or Y This command interacts with AUTORUN and J1 jumper setting as described in table below Start sampling as defined by SINGLESAMPLE and INTERVAL Only applicable if e AUTORUNEN or e AUTORUN Y and you previously sent STOP command to stop sampling Stop sampling Press Enter key to get an S gt prompt before entering this command Interface PCB J1 Jumper AUTORUN SINGLESAMPLE Effect Normal N YorN Wake up when Enter key pressed while in quiescent state and wait for command Y N Wake up when Enter key pressed while in quiescent state and sample at rate specified by INTERVAL To stop sampling and get S gt prompt type STOP and press Enter key Wake up when Enter key pressed while in quiescent state take and output a single sample and automatically power off enter quiescent state To wake up and get S gt prompt type STOP and press Enter key Referred to as Serial Line Sync Mode Autopower YorN Wake up when power applied and wait for command eZ Wake up when power applied and sample at rate specified by INTERVAL until power removed
43. is available in the following pressure ranges 20 100 350 1000 2000 3500 and 7000 meters Sensor Interface Temperature is acquired by applying an AC excitation to a hermetically sealed VISHAY reference resistor and an ultra stable aged thermistor with a drift rate of less than 0 002 C per year A 24 bit A D converter digitizes the outputs of the reference resistor and thermistor and optional pressure sensor AC excitation and ratiometric comparison using a common processing channel avoids errors caused by parasitic thermocouples offset voltages leakage currents and reference errors Conductivity is acquired using an ultra precision Wien Bridge oscillator to generate a frequency output in response to changes in conductivity A high stability TCXO reference crystal with a drift rate of less than 2 ppm year is used to count the frequency from the oscillator 37 Appendix II Electronics Disassembly Reassembl Appendix Il Electronics Disassembly Reassembly Disassembly Screws securing 1 Remove the I O connector end cap and disconnect the electronics from the connector end cap ees A Wipe the outside of the I O connector end cap and housing dry being SHOWN careful to remove any water at the seam between them partially B Remove the two flat Phillips head titanium machine screws Do not removed remove any other screws from the housing C Remove the I O connector end cap by pulling on it firmly and steadily It may
44. is manual e Check cabling between the computer and the MicroCAT 17 Section 3 Preparing the MicroCAT for Deployment 5 Display MicroCAT status information by typing DS and pressing the Enter key The display looks like this Fe ASSO Naa Maier SBE37 SI V 2 2 SERIAL NO 0011 algorithm that applies to some logging not started system configurations sample interval 30 seconds See Timeout Description in output time with each sample Section 4 Deploying and Operating do not output salinity the MicroCAT for details do not output sound velocity do not output density with each sample do not output depth with each sample latitude to use for depth calculation 0 00 deg do not start sampling when power on do not power off after taking a single sample do not power off after two minutes of inactivity A D cycles to average 4 reference pressure 0 0 db temperature 7 54 deg C 6 Command the MicroCAT to take a sample by typing TS and pressing the Enter key The display looks like this 23 7658 0 00019 0 062 26 May 2000 16 30 43 where 23 7658 temperature in degrees Celsius 0 00019 conductivity in S m 0 062 pressure in dBars 26 May 2000 date default upon power up is 01 Jan 1980 16 30 43 time default upon power up is 00 00 00 These numbers should be reasonable i e room temperature zero conductivity barometric pressure gauge pressure current date and time Pacific Daylight or Standard Time 7 Command the MicroC
45. ly power off commands J1 jumper Normal Wake up when Enter key pressed while in power off e Normal AUTORUN N mode wait for a command pins l and2 SINGLESAMPLE Autopower YorN pins 2 and3 J1 jumper Normal Wake up when Enter key pressed while in power off AUTORUN Y mode sample at rate specified by INTERVAL SINGLESAMPLEEN T stop sampling and get S gt prompt type STOP and press Enter key J1 jumper Normal Wake up when Enter key pressed while in power off AUTORUN Y mode take and output a single sample and SINGLESAMPLE Y __ automatically power off To wake up and get S gt prompt type STOP and press Enter key J1 jumper Autopower Wake up when power applied wait for a command AUTORUN N SINGLESAMPLE YorN J1 jumper Autopower Wake up when power applied sample at rate AUTORUN Y specified by INTERVAL until power removed SINGLESAMPLE N J1 jumper Autopower Wake up when power applied take and output a AUTORUN Y single sample Wait for another command until SINGLESAMPLE Y _ Power removed GO Start sampling as defined by SINGLESAMPLE and INTERVAL STOP Stop sampling data Sampling TS Take sample hold converted data in RAM output Do not send converted data these TSR Take sample hold raw data in RAM output raw data commands if SLT Send converted data from last sample in RAM then MicroCAT is take new sample and hold converted data in RAM sampling data TH Take sample hold converted data in RAM at pre SH Send
46. nd pppp are each a 4 byte long integer stored little endian x N do not x number of A D cycles to average range 1 127 default 4 Increasing NCYCLES increases measurement resolution and time required for measurement See Sample Timing in Section 2 Description of the MicroCAT Quit session and place MicroCAT in quiescent sleep state Sampling stops Applicable only if Interface PCB J1 jumper is in Normal position Section 4 Deploying and Operating the MicroCAT Note If the MicroCAT is sampling data and the voltage is less than 6 15 volts for ten consecutive scans the MicroCAT halts logging and displays WARNING LOW BATTERY VOLTAGE in response to the status DS command Note You may need to send the STOP command several times to get the MicroCAT to respond This is most likely to occur if sampling with a small INTERVAL Operating Commands Operating commands configure the MicroCAT s response upon waking up and direct the MicroCAT to sample data once or at pre programmed intervals INTERVAL x AUTOOFF x AUTORUN x SINGLESAMPLE x GO STOP x interval seconds between samples maximum 32767 seconds x gt 10 MicroCAT goes to sleep between samples x lt 10 MicroCAT samples continuously actual interval between samples determined by NCYCLES see Sample Timing in Section 2 Description of the MicroCAT Functional only if J1 jumper on Interface PCB is
47. ng to end cap 30857 Parker 2 033E515 80 I O connector end cap and 4 O ring sensor end cap O ring 50091 Triton X 100 Conductivity cell cleaning 1 solution 801046 4 pin I O cable From MicroCAT to 1 computer 17130 25 pin to 9 pin adapter Connects I O cable to 1 9 pin COM port on computer 17043 Locking sleeve Locks I O cable or dummy 1 plug in place 17046 4 pin dummy plug For use when I O cable not 1 being used 60034 Spare hardware Assorted hardware and O ring kit O rings 43 Index Index A About Sea Bird 5 Anti foul cylinder check 13 cylinder removal before shipping to Sea Bird 34 plugs 13 replacing cylinders 35 Application notes See attachments at end of manual C Calibration 34 certificates See attachments at end of manual Cleaning 32 Command summary 40 Commands calibration coefficients 30 descriptions 24 operating 28 output format 26 27 sampling 29 setup 26 status 25 testing 29 Communication defaults 17 Connector 10 Corrosion precautions 32 D Data output format 26 27 31 Deployment installation 20 preparing for 12 setup 19 Description 7 Dimensions 10 E Electronics disassembly reassembly 38 F Format data output 31 Functional description 37 G Glossary 36 Guard removing 35 J Jumper power up 12 18 44 M Maintenance 32 Modes See Sampling modes P Parts replacement 43 Power
48. oCAT S gt DS SBE37 SI V 2 2 SERIAL NO 0011 logging not started sample interval 30 seconds output time with each sample do not output salinity with each sample do not output sound velocity with each sample do not output density with each sample do not output depth with each sample latitude to use for depth calculation 0 00 deg do not start sampling when power on do not power off after taking a single sample do not power off after two minutes of inactivity A D cycles to average 4 reference pressure 0 0 db temperature 7 54 deg C 25 Section 4 Deploying and Operating the MicroCAT Setup Commands MMDDYY mmddyy Set real time clock month day and year Must be followed by HHMMSS Notes command to set time e DDMMYY and MMDDYY r commands are equivalent Either DDMMYY ddmmyy Set real time clock day month and year can be used to set the date Must be followed by HHMMSS e Date is reset to 01 Jan 1980 command to set time when power is first applied If you wish to use the built in real time HHMMSS hhmmss Set real time clock hour minute clock set the date and then time and second e It is always necessary to set both date and then time If a new date Example Set current date and time for MicroCAT to is entered but not a new time 10 January 2000 12 00 00 the new date will not be saved SsMMDDYY 011000 S gt HHMMSS 120000 or S gt DDMMYY 100100 S gt HHMMSS 120000
49. of full scale 0 0001 mS cm range Sensor 1 to 32 0 to 6 physical Ambient pressure to Calibration calibration over full scale range in the range 2 6 to 5 steps 6 S m plus zero conductivity air Counter Quartz TCXO 2 ppm per year aging Time Base 5 ppm vs temperature 5 to 30 C Real Time Clock Watch crystal type 32 768 Hz corrected for drift and aging by comparison to MicroCAT counter time base to produce overall 5 ppm accuracy 2 6 minutes year External Input Power 7 24 VDC Power Requirements Quiescent Current 10 microamps Acquisition Current 40 milliamps maximum Acquisition Time 0 66 10 seconds sample programmable Housing Titanium pressure case rated at 7000 meters 23 000 feet Weight without pressure sensor In water 1 9 kg 4 3 Ibs In air 2 9 kg 6 5 Ibs Resolution Typical RMS noise with fixed resistors on the temperature and conductivity inputs NCYCLES Temperature Conductivity C S m 1 0 000220 0 000012 2 0 000173 0 000009 4 0 000127 0 000008 8 0 000094 0 000005 16 0 000060 0 000005 See Section 4 Deploying and Operating the MicroCAT for a description of NCYCLES Section 2 Description of the MicroCAT Dimensions Dimensions in millimeters inches Pressure port 67 3 108 0 2 65 4 25 62 2 1a 2 45 4 05 Diameter i 1 10 pe en OFTA ma O 9 50 O Ciamp e 1O O O 0 261 Di
50. or If you must use a wrench or pliers be careful not to loosen the bulkhead connector instead of the locking sleeve Locking sleeve Dummy plug 3 Remove the dummy plug from the MicroCAT s I O bulkhead connector by pulling the plug firmly away from the connector 4 Install the Sea Bird I O cable connector aligning the raised bump on the side of the connector with the large pin pin 1 ground on the MicroCAT 5 Connect the I O cable connector to your computer s serial port A 25 to 9 pin adapter is supplied for use if your computer has a 9 pin serial port 6 Connect the I O cable connector s red and black wires to a power supply 7 24 VDC Receive Pin 2 Transmit Pin 3 Ground Pin 1 large i align with raised bump Power Pin 4 on connector Note Refer to the Schematics at the back of the manual for I O Cable pin outs Ground pin Computer data common pin 1 Receive pin RS 232C receive data transmitted from computer pin 2 Transmit pin RS 232C transmit data from MicroCAT to computer pin 3 Power pin 7 24 VDC pin 4 14 Section 3 Preparing the MicroCAT for Deployment Note See SEATERM s help files for detailed information on the use of the program Note There is at least one way and as many as three ways to enter a command e Manually type a command in Command Data Echo Area e Use a menu to automatically generate a command e Use a Toolbar button
51. ous Sampling includes both Interval Sampling and Continuous Sampling e INTERVAL between 10 and 32767 Interval sampling can range from 10 to 32767 seconds between samples For each sample the MicroCAT automatically wakes up samples and sends data and goes to sleep e INTERVAL less than 10 Continuous sampling occurs at the fastest rate possible for the selected parameters see Sample Timing in Section 2 Description of the MicroCAT The MicroCAT continuously samples and sends data and does not go to sleep between samples Examples Autonomous Sampling both examples illustrate interval sampling setup for continuous sampling is similar Example 1 Interface PCB J1 jumper in Normal position Set up to take samples every 20 seconds Send date and time with data Send power off command to MicroCAT after all parameters are entered system automatically wakes up and powers down for each sample Click Connect on Toolbar to wake up S gt SINGLESAMPLE N S gt INTERVAL 20 S gt OUTPUTTIME Y S gt AUTORUN Y S gt QS When ready to begin sampling Click Capture on Toolbar to capture data to a file program requests file name for data to be stored Click Connect on Toolbar to wake up MicroCAT automatically begins sampling When ready to stop sampling Type STOP and press Enter key to get S gt prompt S gt QS Example 2 Interface PCB J1 jumper in Autopower position Set up to take samples every 20 seconds Sen
52. s are attached to the guard and connected with tubing to the cell Removing the guard without disconnecting the cups from the guard will break the cell If the guard must be removed 1 Remove the two screws connecting each anti foul cup to the guard 2 Remove the four Phillips head screws connecting the guard to the housing and end cap 3 Gently lift the guard away Notes e Please remove anti foul cylinders from the anti foul cups before returning MicroCATs to Sea Bird e Store removed anti foul cylinders in a plastic bag and keep them ina cool place The MicroCAT has an anti foul cup and cap on each end of the cell New MicroCATs are shipped with an anti foul cylinder and a protective plug pre installed in each cup Anti foul cylinders have a useful deployment life of approximately two years Sea Bird recommends that you keep track of how long the cylinders have been deployed to allow you to purchase and replace the cylinders when needed Handling the cylinders with gloves follow this procedure to replace each anti foul cylinder two 1 Remove the protective plug from the anti foul cup 2 Unscrew the cap with a 5 s inch socket wrench 3 Remove the old anti foul cylinder If the old cylinder is difficult to remove e Use needle nose pliers and carefully break up material e If necessary remove the guard to provide easier access 4 Place the new anti foul cylinder in the cup 5 Rethread the c
53. scribed in Command Descriptions before setting up your system Polled Sampling Sampling commands The MicroCAT takes one sample of data and sends the data to the computer Examples Polled Sampling Example 1 Interface PCB J1 jumper in Normal position Wake up MicroCAT Set up MicroCAT to wait for command each time MicroCAT wakes up send date and time with data and send salinity with data Send power off command to MicroCAT Click Connect on Toolbar to wake up S gt AUTORUN N S gt OUTPUTTIME Y S gt OUTPUTSAL Y S gt QS When ready to take a sample wake up MicroCAT Command MicroCAT to take a sample and output converted data Send power off command to MicroCAT Click Connect on Toolbar to wake up S gt TS S gt QS Example 2 Interface PCB J1 jumper in Autopower position Wake up MicroCAT Set up MicroCAT to wait for command each time MicroCAT wakes up send date and time with data and send salinity with data Send power off command to MicroCAT Apply power to wake up S gt AUTORUN N S gt OUTPUTTIME Y S gt OUTPUTSAL Y S gt QS When ready to take a sample wake up MicroCAT Command MicroCAT to take a sample and output converted data Send power off command to MicroCAT Apply power to wake up S gt TS S gt QS 21 Section 4 Deploying and Operating the MicroCAT Autonomous Sampling Operating commands The MicroCAT samples data at pre programmed intervals defined by the INTERVAL command Autonom
54. to communicate with MicroCAT COM port can then be used by another program Note that MicroCAT must be connected to COM port for data to be obtained See Command Descriptions in Section 4 Deploying and Operating the MicroCAT 16 Section 3 Preparing the MicroCAT for Deployment 3 Inthe Configure menu select SBE 37 The dialog box looks like this SBE 37 Configuration Options Interface for communication between computer and MicroCAT Computer COM port baud rate data bits and parity for communication between computer and MicroCAT Make the selections in the Configuration Options dialog box COMM Port COM 1 through COM 10 as applicable Baud Rate 9600 documented on front cover of this manual Data Bits 8 Parity None Mode RS 232 Full Duplex Click OK to overwrite an existing configuration file or click Save As to save the configuration as a new filename 4 Click the Connect button on the Toolbar The display looks like this Communication Established S gt This shows that correct communications between the computer and the MicroCAT has been established If the system does not respond as shown above e Click the Connect button again or press the Enter key twice e Verify the correct instrument was selected in the Configure menu and the settings were entered correctly in the Configuration Options dialog box Note that the baud rate is documented on the front cover of th
55. ynchronize MicroCAT sampling with their own Calibration coefficients stored in EEPROM allow the MicroCAT to transmit data in engineering units The MicroCAT retains the temperature and conductivity sensors used in the SBE 16 SEACAT C T Recorder but has improved acquisition electronics that increase accuracy and resolution and lower power consumption The MicroCAT s aged and pressure protected thermistor has a long history of exceptional accuracy and stability typical drift is less than 0 002 C per year Electrical isolation of the conductivity electronics eliminates any possibility of ground loop noise The MicroCAT s internal field conductivity cell is immune to proximity errors and unaffected by external fouling Expendable anti fouling devices inhibit internal fouling A plastic cup with threaded cover at each end of the cell retains the anti foul material The toxin quantity is typically sufficient for at least two year s deployment The MicroCAT s optional pressure sensor developed by Druck Inc has a superior new design that is entirely different from conventional silicon types in which the deflection of a metallic diaphragm is detected by epoxy bonded silicon strain gauges The Druck sensor employs a micro machined silicon diaphragm into which the strain elements are implanted using semiconductor fabrication techniques Unlike metal diaphragms silicon s crystal structure is perfectly elastic so the sensor is essentially

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