Sea-Bird Scientific SBE 37 MicroCAT User Manual
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Sea-Bird Scientific SBE 37 MicroCAT User Manual

Rs485 conductivity and temperature sensor (optional pressure and optical dissolved oxygen)
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RS485 Conductivity and temperature sensor (optional
Document No.
37 RS485 SM,
SMP, SMP-ODO
Release Date:
2023-01-05
Version:
A
Software:
Seasoft V2
SBE 37 MicroCAT
pressure and optical dissolved oxygen)
425-643-9866
seabird.com
User manual

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Summary of Contents for Sea-Bird Scientific SBE 37 MicroCAT

  • Page 1 User manual SBE 37 MicroCAT RS485 Conductivity and temperature sensor (optional pressure and optical dissolved oxygen) Document No. 37 RS485 SM, SMP, SMP-ODO Release Date: 2023-01-05 Version: Software: Seasoft V2 425-643-9866 seabird.com...

  • Page 3: Table Of Contents

    Table of Contents Section 1 Safety information ......................3 1.1 Hazard information........................3 1.2 Equipment labels.......................... 4 Section 2 MicroCAT quick start guide ................... 5 Section 3 Specifications ........................7 3.1 Feature summary......................... 7 3.2 Mechanical........................... 7 3.2.1 Bulkhead connector......................7 3.2.2 Dimensions..........................8 3.3 Electrical............................
  • Page 4 Table of Contents 8.9 Calibration..........................46 8.9.1 Conductivity........................46 8.9.2 Temperature........................46 8.9.3 Pressure..........................47 8.9.4 Optical Dissolved Oxygen....................47 8.10 Spare parts and accessories....................47 8.10.1 SBE 37 spare hardware and O-ring kit................48 Section 9 Reference: command descriptions ................49 9.1 Sensor ID...........................

  • Page 5: Section 1 Safety Information

    Section 1 Safety information Please read this entire manual before this equipment is unpacked, set up, or operated. Pay attention to all danger, warning, and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment. D A N G E R Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.

  • Page 6: Equipment Labels

    Safety information N O T I C E The manufacturer is not responsible for any damages due to misapplication of misuse of this product including, without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent permitted under applicable law. The user is solely responsible to identify critical application risks and install appropriate mechanisms to protect process during a possible equipment malfunction.

  • Page 7: Section 2 Microcat Quick Start Guide

    Section 2 MicroCAT quick start guide This quick start guide gives the steps necessary to make sure that the SBE 37 MicroCat sensor operates correctly and collects data before it is deployed. This quick start guide and user manual applies to SBE 37-SM (RS485), SBE 37-SMP (RS485), and SBE 37-SMP-ODO (RS485) models.
  • Page 8 MicroCAT quick start guide...

  • Page 9: Section 3 Specifications

    Section 3 Specifications 3.1 Feature summary Model Hardware options Communication options (RS232 is standard) Pressure Internal Pump Optical RS485 SDI-12 Integrated batteries Dissolved Inductive Oxygen Modem 37-SM 37-SMP X or X 37-SMP-ODO X or X 37-SI 37-SIP 37-IM 37-IMP 37-IMP-ODO Abbreviation key: •...

  • Page 10: Dimensions

    Specifications 3.2.2 Dimensions 37 SM (RS485) SMP (RS485)

  • Page 11: Electrical

    Specifications SMP-ODO (RS485) 3.3 Electrical Table 1 Power requirements SMP-ODO Low power 30 µA Communication current draw 15 mA 0.065 watts Data collection current draw, real-time 15 mA data transmitted Data collection current draw, no real-time 13 mA data transmitted Pump —...

  • Page 12: Analytical

    Specifications Data collection rate 1 Hz 37-SM data storage 533000 samples 37-SMP data storage 37-SMP-ODO data storage 381000 samples 3.5 Analytical Parameter Range Accuracy Stability Resolution Conductivity 0–70 mS/cm ±0.003 mS/cm 0.003 mS/cm/mo 0.0001 mS/cm Temperature -5–45 °C ±0.002 °C (-5–35 °C) 0.0002 °C/mo 0.0001 °C Pressure...

  • Page 13: Section 4 Overview

    Section 4 Overview 4.1 Operation The SBE 37 MicroCAT measures conductivity (C) and temperature (T). Optional equipment includes: • Pressure (depth) • Internal pump • Optical Dissolved Oxygen (ODO) The sensor can operate as a stand-alone or is easily integrated with other platforms.

  • Page 14: Battery Life

    Overview The time that shows with the data is the time at the start of the sample. For example, if the sensor is set to sample at 12:00:00, the stored time shown in the data will be 12:00:01 or 12:00:02. Sample times to operate the pump and take a sample Table 4 Autonomous mode Condition...

  • Page 15: Cable Length And External Power

    Overview Example: 10 SBE 37 SMP-ODOs with pressure sensors are set up to sample autonomously and take a sample every 10 minutes, or 6 samples/hour (GData and Dataii). Real-time data is requested once every hour. Adaptive Pump Control is enabled. Deployment is at approximately 500db, at a temperature of approximately 10 °C. OxTau20 is manufacturer-set at 5.5.
  • Page 16 Overview • Supply a minimum of 9 V, after IR loss, so the MicroCAT uses the internal batteries, or if no batteries are installed. V - IR > 9 V. • I = required communication current = 0.25 amps What is the maximum cable length needed to supply 12 volts of power from an external power source to the 37 SMP-ODO with 20 gauge wire? 12 V - 0.25 amps ×...

  • Page 17: Section 5 Set Up Sensor And Verify Operation

    Section 5 Set up sensor and verify operation C A U T I O N AF24173 anti-fouling devices contain bis(tributyltin) oxide. Wear rubber or latex gloves and eye protection to replace these devices on the sensor if it is so equipped. Wash hands with soap and water when finished.

  • Page 18: Install Batteries

    Set up sensor and verify operation 5.2 Install batteries W A R N I N G Explosion hazard. If the batteries are not installed correctly, explosive gases can be released. Make sure that the batteries are of the same approved chemical type and are inserted in the correct orientation.
  • Page 19 Set up sensor and verify operation Table 7 Recommended lithium battery brands SAFT LS-14500 (included) 3.6 V, 2.6 Ah Tadiran TL-4903 3.6 V, 2.4 Ah Electrochem BCX85 series 3.9 V, 2.0 Ah 1. Make sure that the end flange and pressure housing are dry. 2.

  • Page 20: Install Software And Test Sensor

    Set up sensor and verify operation 17. Align the "D"-shaped part of the battery pack with the pins on the shaft. 18. Slowly move the assembly onto the housing. Push gently to connect the battery assembly with the circuit board in the pressure housing. 19.

  • Page 21: Software Menu Items

    Set up sensor and verify operation 5. Double-click on SeatermV2.exe to start the launcher. If this is the first time the software is opened, a Serial Port Configuration window opens. The software automatically connects at the default baud rate but will try others if necessary. The software automatically looks for the serial port number of the connected sensor.

  • Page 22: Set Up Pump

    Set up sensor and verify operation 4. If there is still no communication, check the cable and connections with the SIM or IMM, the sensor, and the PC. 5. If there is still no communication, do step 1 with a different COM port or different fixed ID and try to connect again.
  • Page 23 Set up sensor and verify operation A = 2.549 B = -1.106 × 10 C = 1.571 × 10 pcor = 1.45 × 10 OxTau20 = oxygen calibration coefficient OxNTau = pump time multiplier P = measured pressure, decibars T = measured temperature, °C Variables for the algorithm above, with a typical OxTau 20 value of 5.5, and an OxNTau value of 7.0: T, °C...
  • Page 24 Set up sensor and verify operation...

  • Page 25: Section 6 Deployment And Recovery

    Section 6 Deployment and recovery W A R N I N G If the user thinks that a sensor has water in the pressure housing: Disconnect the sensor from any power supply. Put on safety glasses and make sure that the sensor is pointed away from the body and other people.
  • Page 26 Deployment and recovery The amount of air in the water column can have an effect on pump operation: • The top ±2 m of the water column may have a continuous supply of bubbles from breaking waves. It is important to be able to continuously remove air from the system. •...

  • Page 27: Data Collection Modes

    Deployment and recovery 10. Make sure all stored data has been transmitted to a PC. Send InitLogging to clear the memory. If this command is not sent, data will be stored after the last collected sample. 11. Set the date and time with DateTime. 12.

  • Page 28: Autonomous Mode

    Deployment and recovery Start all sensors on the line. Set the current date and time to December 1, 2019 9:00 am. For each MicroCAT, set up to send data in converted decimal format with temperature, conductivity, pressure, oxygen, and salinity. Set up to receive a Busy tag if a command is sent while GData is processed. After all parameters are entered, verify the setup, then send power-off command.

  • Page 29: Default Output Format

    Deployment and recovery The sensor will not accept commands while it collects a sample. If the sensor does not respond, send the command again to continue to try and start communication. Keep the signal line open circuit or within ±0.3 V in relation to ground to minimize power consumption between commands.

  • Page 30: Other Data Formats

    Deployment and recovery ccc.cccc in S/m, if #iiSetCondUnits=0 cccc.cccc in mS/cm, if #iiSetCondUnits=1 (ODO only) cccccc.c in µS/cm, if #iiSetCondUnits=2 (ODO only) ppppp.ppp pressure, sent if pressure sensor is installed. #iiOutputPress=y with units specified by #iiSetPressUnits=. Digits left of the decimal specified by range of pressure sensor. ssss.ssss salinity in psu, sent if #iiOutputSal=y vvvvv.vvv...

  • Page 31: Alternate Output Format

    Deployment and recovery <id>ii</id> <sn>nnnnnnnn</sn> </hdr> <data> <t1>tttt.tttt</t1> <c1>c</c1> <p1>ppppp.ppp</p1> <ox63r>ooo.ooo</ox63r> <sal>sss.ssss</sal> <sv>vvvv.vvv</sv> <sc>x</sc> <smpl>sample</smpl> <dt>yyyy-mm-ddThh:mm:ss</dt> </data> </datapacket> SM RS485 and SMP RS485 example for sensor with ID=03 with pressure sensor, #iiOutputFormat=2, #ii#iiOutputDepth=y, #iiOutputSal=y, #iiOutputSV=y, #iiOutputDensity=y ID, serial number, temperature, conductivity, pressure, depth, salinity, sound velocity, local density, date, time <?xml version="1.0"?>,datapacket><hdr><mfg>Sea- Bird</mfg><model>37SM</model><id>03</><sn>03709999</sn></hdr><data><t1>8.5796</t1><...

  • Page 32: Transmit Real-Time Data

    Deployment and recovery • ccccc.ccc=conductivity frequency, Hz • ppppp=pressure sensor pressure, in A/D counts. Sent if pressure sensor is installed. • vvvv=presure sensor pressure temperature compensation, in A/D counts. Sent if pressure sensor is installed. • oo.ooo=oxygen sensor phase, µsec (ODO only) •...

  • Page 33: Recover Sensor From Deployment

    Deployment and recovery 6.4 Recover sensor from deployment D A N G E R If the system stops while under water or shows other signs of damage, it may be flooded. The end flange may be ejected from the pressure housing with lethal force. Upon recovery, carefully secure it away from people, and slowly loosen the end flange (½...
  • Page 34 Deployment and recovery...

  • Page 35: Section 7 Transmit And Convert Data

    Section 7 Transmit and convert data Data that is collected and stored by sensors must be transmitted to a PC to process the data into a human-readable format. 7.1 Transmit data to PC Data can be transmitted during deployment or after the sensor is recovered from a deployment.

  • Page 36: Convert Data

    Transmit and convert data 9. Optional: select the Header Form tab. 10. If necessary, select "Prompt for Header Information" at "Header Choice." 11. Enter up to 12 lines of header information that will identify the transmitted data. Examples include mooring description, latitude/longitude, deployment start date, deployment end date.
  • Page 37 Transmit and convert data 4. Select Conductivity, Temperature, Pressure (optional), Oxygen (optional), and other derived variables such as Salinity, Density, Sound Velocity, etc. Push OK. 5. Push Start Process in the Data Setup tab. The software converts the .hex file to a .cnv file.
  • Page 38 Transmit and convert data...

  • Page 39: Section 8 Maintenance

    Section 8 Maintenance W A R N I N G If the user thinks that a sensor has water in the pressure housing: Disconnect the sensor from any power supply. Put on safety glasses and make sure that the sensor is pointed away from the body and other people.

  • Page 40: Clean Flow Path

    Maintenance 3. Remove the protective plug from the anti-fouling device cup. 4. Use a toothpick to lift each of the anti-fouling devices out of the holder. If necessary, use needle-nose pliers to carefully break up the device. Option Procedure To deploy Insert new anti-fouling devices into the cup, then install the cap onto the sensor cup.

  • Page 41: Maintain Pump

    Maintenance used. Do not expose the pH sensor to air for longer than a few minutes. Refer to "Prepare pH sensor for storage" for details to remove the pH sensor. 2. Put the instrument in a container with the bulkhead connector face-up. 3.

  • Page 42: Examine O-Rings

    Maintenance 8.6 Examine O-rings N O T I C E Do not use petroleum-based lubricants on O-rings. It will cause damage to the O-rings. Damaged O-rings can cause the sensor to flood and make it unserviceable. Examine the O-rings on the sensor every time they are exposed—on the connector end flange and other parts.

  • Page 43: Ctd Storage

    Maintenance Separation of the rubber from the pins. Swelled or bulging rubber pins. 6. Use a silicone-based lubricant on each of the contacts of the bulkhead connector. The manufacturer recommends any of the products listed below. ™ • Spray Silicone Lubricant (3M ID# 62-4678-4930-3). Make sure to let it dry. ®...

  • Page 44: Mechanical Specs

    Maintenance 8.8.1 Mechanical specs This library includes label variables. Each label variable is defined in a separate paragraph by means of the <msgph> element. The <msgph> attribute 'varid' should hold a unique name for the variable. Diameter SeaFET11.4 cm SeaOWL uva5.66 cm SeaOWL uva slc7.57 cm C-Rover10.1 cm ECO (most, incl V2 Triplet)6.30 cm...
  • Page 45 Maintenance ECOV2 quad, quad6k, triplet 6k, triplet, 2k, RT6k, FLbb14.3 cm ECOV2 tripletw, quadw, FLbbw22.1 cm ECOV2 battery, 6k battery30.5 cm ECOV2wb, all33.34 cm WETStar17.1 cm WETStar with tubing25.7 cm BAM (Std)19.56 cm C-Star25 cm pathlength: 9.3 x 6.4 x 47 cm C-Star10 cm pathlength: 9.3 x 6.4 x 29.2 cm DH417.25 cm WQM65.4 cm...
  • Page 46 Maintenance Weight in air, water SeaFET5.45 kg SeapHOx 10.45 kg Deep SeapHOx 12 kg SeaOWL uva slc0.40 kg SeaOWL uva0.44 kg SeaOWL uva 160 ml C-Rover 4.11 kg, 0.028 kg C-Rover displacement4546 ml RT, Std0.40 kg, 0.02 kg Deep1.3 kg, 0.75 kg Battery, shutter&battery0.96 kg, 0.14 kg PAR shutter&battery1.062 kg, 0.163 kg Shutter0.50 kg, 0.08 kg...
  • Page 47 Maintenance 37-SMP-ODO ti4.1, 2.2 kg 37-SM485 plastic2.7, 1.2 kg 37-SM485 ti3.8, 2.3 kg 37-SMP485 plastic3.5, 1.5 kg 37-SMP485 ti5.0, 3.0 kg 37-SMP-ODO485 plastic3.4, 1.5 kg 37-SMP-ODO485 ti4.2, 2.3 kg 37-SI, SI485 plastic2.2, 1.2 kg 37-SI, SI485 ti2.9, 1.9 kg 37-SIP, SIP485 plastic2.3, 1.4 kg 37-SIP, SIP485 ti3.0, 1.8 kg 37-IM plastic2.6, 1.2 kg 37-IM ti3.5, 2.1 kg...

  • Page 48: Calibration

    Maintenance -4–40 °C SeaFET storage range2–55 °C -5–45 °C Depth 20 m 50 m 100 m 200 m 250 m 300 m 350 m 500 m 600 m 850 m 1000 m 1500 m 2000 m 3500 m 5000 m 6000 m 6800 m 7000 m...

  • Page 49: Pressure

    Maintenance 8.9.3 Pressure The strain-gauge pressure sensor has an initial static error band of 0.05%. Pressure sensors show most of their error as a linear offset from zero. Note that the pressure sensor is an "absolute" sensor, so the raw data includes the effect of atmospheric pressure of 14.7 psi.

  • Page 50: Sbe 37 Spare Hardware And O-Ring Kit

    Maintenance 20200.0 USB-to-serial port adapter, FTDI UC232R-10 311521 Anti-fouling shipping label 171498.1 Connector, dummy, MCDC6F to MCIL6MP or MCBH6MP 801583 Connector, 10-contact DF11 to 9-contact DB9S and battery snap, from IMM to PC and power supply Cables 801263 Cable, data/power interface, 2.4 m, MCIL4FS to DB9S and 9V battery snap 801206 Cable, data/power interface, 2.4 m, MCIL4FS to DB9S and red and black twisted wire leads 801850...

  • Page 51: Section 9 Reference: Command Descriptions

    Section 9 Reference: command descriptions This is a reference for advanced users. The values of these commands are stored in the sensor until the user changes them. Notes about terminal commands are listed below. • Commands are not case-sensitive. Push Enter to store a command. •...

  • Page 52: Get Data

    Reference: command descriptions All sensors operate each pump and collect one sample. Data is stored in the buffer until Dataii is received. Data is not stored in the flash memory. The pump always operates in response to GData or a polled mode command. Make sure that there is water in the system.
  • Page 53 Reference: command descriptions #iiTxDelay= <RS485TxDelay>25</RS485TxDelay> </ConfigurationData> Example for 37 SMP-RS485, user entries in boldface. GETCD <ConfigurationData DeviceType='SBE37SMP-RS485' SerialNumber='03712345'> <PressureInstalled>yes</PressureInstalled> (installed by manufacturer) #iiSetPumpInstalled= <PumpInstalled>yes</PumpInstalled> #iiMinCondFreq= <MinCondFreq>3000.0</MinCondFreq> #iiOutputFormat= <SampleDataFormat>converted engineering</SampleDataFormat> #iiOutputSal= <OutputSalinity>yes</OutputSalinity> #iiOutputSV= <OutputSV>yes</OutputSV> #iiOutputDepth= <OutputDepth>yes</OutputDepth> #iiLatitude= <Latitude>0.0</Latitude> #iiOutputDensity= <OutputDensity>yes</OutputDensity> #iiSampleInterval= <SampleInterval>15</SampleInterval>...
  • Page 54 Reference: command descriptions #iiTxDelay= <RS485TxDelay>25</RS485TxDelay> </ConfigurationData> #iiGetSD Show status data. Data changes while the sensor is deployed. Sensor model, S/N #iiDateTime= format of date and time yyyy-mm-ddThh:mm:ss Number of recorded events. Use #iiResetEC to re-set the event counter. Voltages, main and back-up lithium Memory: number of bytes in memory, number of samples in memory, number of additional samples that can be saved in memory Data collection status, yes or no, and if applicable, why data collection has stopped.

  • Page 55: General Setup

    Reference: command descriptions • #iiDS is almost the same as #iiGetSD and #GetCD, but in a different format. • Lines that describe what parameters will show, such temperature, conductivity, or oxygen, will only show if they are enabled, and if #iiOutputFormat=1 or 2. #iiDC Show Calibration coefficients Note:...

  • Page 56: Memory Setup

    Reference: command descriptions 9.7 Memory setup Notes: • If the flash memory is full, data collection stops. Make sure to transmit the data from the sensor before the #iiInitLogging command is sent. • Send either #iiInitLogging or #iiSampleNumber= two times, to verify the command. •...

  • Page 57: Autonomous Operation With Data Storage

    Reference: command descriptions #iiTimeFormat=x x=0: dd mmm yyyy, hh:mm:ss. Default. x=1: yyyy-mm-ddThh:mm:ss x=2: hh:mm:ss, dd-mm-yyyy x=3: hh:mm:ss, mm-dd-yyyy #iiOutputSal=x x=Y: calculate and show salinity, psu. x=N: do not #iiOutputSV=x x=Y: calculate and show sound velocity, m/sec. x=N: do not #iiOutputSC=x x=Y: calculate and show specific conductivity.

  • Page 58: Polled Data Collection

    Reference: command descriptions 9.10 Polled data collection #iiTS Collect a sample, store data, show data in the format specified by #iiOutputFormat= #iiTSR Collect a sample, store data, show data in raw decimal format #iiTPS Operate pump, collect a sample, show data #iiTPSH Operate pump, collect a sample, store data #iiTPSS...

  • Page 59: Optical Dissolved Oxygen Sensor

    Reference: command descriptions #iiTA2=F F=temperature A2 #iiTA3=F F=temperature A3 #iiCCalDate=S S=conductivity calibration date #iiCG=F F=conductivity G #iiCH=F F=conductivity H #iiCI=F F=conductivity I #iiCJ=F F=conductivity J #iiWBOTC=F F=conductivity wbotc #iiCTCor=F F=conductivity ctcor #iiCPCor=F F=conductivity cpcor #iiPCalDate=S S=pressure calibration date #iiPA0=F F=pressure A0 #iiPA1=F F=pressure A1 #iiPA2=F...

  • Page 60: Dissolved Oxygen Coefficients

    Reference: command descriptions SetAutoRun=0 Manufacturer-set. Cannot be changed. Sensor waits for command when power is supplied. Take one sample and send data to the MicroCAT. 9.13.2 Dissolved oxygen coefficients #iiOxCalDate=S S= oxygen calibration date #iiOxTau20=F F= oxygen Tau20 (sensor response time) #iiOxA0=F F= oxygen A0 #iiOxA1=F...

  • Page 61: Section 10 Troubleshooting

    Section 10 Troubleshooting 10.1 No communications with sensor If the OutputExecutedTag=N, the S> prompt shows that there was communication between the sensor and PC. Select Connect in the Communications menu again, or push Enter several times. Cause: The I/O cable is not connected correctly. Solution: make sure the cable is connected at the PC and the sensor.
  • Page 62 Troubleshooting differences in response times for temperature and conductivity measurements can be corrected for post-processing if the response times are known. In moored applications, the pump flushes the conductivity cell faster than the environment changes, so temperature and conductivity measurements stay aligned. Typical causes of salinity spikes include: •...

  • Page 63: Section 11 General Information

    Section 11 General information W A R N I N G This product can expose the user to chemicals with silica, crystalline (airborne particles of respirable size), which is known to the State of California to cause cancer and birth defects or other reproductive harm.
  • Page 64 General information OTHER INGREDIENTS: ....47.9% TOTAL ....... . . 100.0% DANGER See Precautionary Statements for additional information.

  • Page 65: Lithium Battery Shipment

    General information been notified in writing prior to discharge. Do not discharge effluent containing this product to sewer systems without previously notifying the local sewage treatment plant authority. For guidance contact your State Water Board or Regional Office of EPA. This material is toxic to fish.

  • Page 66: China Rohs Disclosure Table

    General information Sensor, no spares Sensor, 1 or 2 spare cell sets Cells only UN # 3091 3090 PI # Passenger aircraft Cargo aircraft Label requirements 11.5 China RoHS disclosure table Name of Part Hazardous substance or element in product Cr(VI)) PBDE PCBs...
  • Page 68 Sea-Bird Electronics 13431 NE 20th Street Bellevue WA 98005 U.S.A. (425) 643-9866 © Sea-Bird Electronics, Inc., 2022-2023. All rights reserved. Printed in USA. RS485 SMP, SMP-ODO*...

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