Sea-Bird Electronics SBE 37-SMP MicroCAT User Manual

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For most

SBE 37-SMP MicroCAT

Conductivity, Temperature, and (optional) Pressure Recorder with RS-232 Interface and Integral Pump

applications, deploy in orientation shown (connector end down) for proper operation

Shown with optional ShallowCAT plastic housing; standard titanium housing available

User’s Manual

Sea-Bird Electronics, Inc.

13431 NE 20 Bellevue, Washington 98005 USA

Telephone: +1 425-643-9866 Manual version #019, 09/19/13 Fax: +1 425-643-9954 Firmware version 4.1 and later E-mail: seabird@seabird.com SeatermV2 version 2.3.0 and later Website: www.seabird.com SBE Data Processing version 7.23.1 and later

Street

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.

Manual revision 019 Declaration of Conformity SBE 37-SMP RS-232

Declaration of Conformity

Manual revision 019 Table of Contents SBE 37-SMP RS-232

Limited Liability Statement ................................................................ 2

Declaration of Conformity .................................................................. 3

Table of Contents ................................................................................. 4

Section 1: Introduction ........................................................................ 6

About this Manual .............................................................................................6

Quick Start .........................................................................................................6

Unpacking MicroCAT .......................................................................................7

Shipping Precautions .........................................................................................8

Section 2: Description of MicroCAT .................................................. 9

System Description ............................................................................................9

Specifications ................................................................................................... 11

Dimensions and End Cap Connector ............................................................... 12

Cables and Wiring ........................................................................................... 13

Sample Timing ................................................................................................. 14

Battery Endurance ............................................................................................ 14

External Power ................................................................................................. 15

Cable Length and External Power ............................................................ 15

Section 3: Preparing MicroCAT for Deployment ........................... 17

Battery Installation ........................................................................................... 17

Software Installation ........................................................................................ 19

Power and Communications Test .................................................................... 19

Test Setup ................................................................................................. 19

Test ........................................................................................................... 20

Section 4: Deploying and Operating MicroCAT ............................. 25

Sampling Modes .............................................................................................. 25

Polled Sampling ........................................................................................ 26

Autonomous Sampling (Logging commands) .......................................... 27

Serial Line Synchronization (Serial Line Sync) ....................................... 28

Real-Time Data Acquisition ............................................................................ 29

Timeout Description ........................................................................................ 29

Command Descriptions .................................................................................... 30

Data Formats .................................................................................................... 45

Optimizing Data Quality / Deployment Orientation ........................................ 47

Setup for Deployment ...................................................................................... 48

Deployment ...................................................................................................... 49

Recovery .......................................................................................................... 50

Uploading and Processing Data ....................................................................... 51

Editing Raw Data File ...................................................................................... 58

Section 5: Routine Maintenance and Calibration ........................... 59

Corrosion Precautions ...................................................................................... 59

Connector Mating and Maintenance ................................................................ 59

Conductivity Cell Maintenance ....................................................................... 60

Plumbing Maintenance .................................................................................... 60

Handling Instructions for Plastic ShallowCAT Option .................................... 61

Replacing Batteries .......................................................................................... 62

Pressure Sensor (optional) Maintenance .......................................................... 62

Replacing Anti-Foulant Devices – Mechanical Design Change ...................... 63

Replacing Anti-Foulant Devices (SBE 37-SI, SM, IM) ................................... 64

Sensor Calibration ............................................................................................ 65

Manual revision 019 Table of Contents SBE 37-SMP RS-232

Section 6: Troubleshooting ................................................................ 67

Problem 1: Unable to Communicate with MicroCAT ..................................... 67

Problem 2: No Data Recorded ......................................................................... 67

Problem 3: Unreasonable T, C, or P Data ........................................................ 67

Problem 4: Salinity Spikes ............................................................................... 68

Glossary .............................................................................................. 69

Appendix I: Functional Description ................................................. 71

Sensors ............................................................................................................. 71

Sensor Interface ............................................................................................... 71

Real-Time Clock .............................................................................................. 71

Appendix II: Electronics Disassembly/Reassembly ........................ 72

Appendix III: Command Summary ................................................. 74

Appendix IV: AF24173 Anti-Foulant Device .................................. 76

Appendix V: Replacement Parts ...................................................... 80

Appendix VI: Manual Revision History .......................................... 82

Index .................................................................................................... 84

Manual revision 019 Section 1: Introduction SBE 37-SMP RS-232

Section 1: Introduction

This section includes a Quick Start procedure, photos of a standard MicroCAT shipment, and battery shipping precautions.

About this Manual

This manual is to be used with the SBE 37-SMP MicroCAT Conductivity and Temperature Recorder (pressure optional) with RS-232 Serial interface, internal Memory, and integral Pump. 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 contact us with any comments or suggestions (seabird@seabird.com or 425-643-9866). Our business hours are Monday through Friday, 0800 to 1700 Pacific Standard Time (1600 to 0100 Universal Time) in winter and 0800 to 1700 Pacific Daylight Time (1500 to 0000 Universal Time) the rest of the year.

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. Install batteries and test power and communications (Section 3: Preparing

MicroCAT for Deployment).

2. Deploy the MicroCAT (Section 4: Deploying and Operating MicroCAT):

A. Install new batteries if necessary.

B. Ensure all data has been uploaded, and then send InitLogging to

make entire memory available for recording if desired.

C. Set date and time, and establish setup and logging parameters.

D. Check status (DS) and calibration coefficients (DC) to verify setup.

E. Set MicroCAT to start logging now or in the future.

F. Remove yellow protective label from plumbing intake and exhaust.

Remove conductivity cell guard, and verify AF24173 Anti-Foulant Devices are installed. Replace conductivity cell guard. Leave label off for deployment.

G. Install dummy plug or cable connector, and locking sleeve.

H. Deploy MicroCAT, using Sea-Bird or customer-supplied hardware.

For most applications, mount the MicroCAT with the connector at the bottom for proper operation.

I. Upload data from memory.

Manual revision 019 Section 1: Introduction SBE 37-SMP RS-232

Spare hardware

Software, and Electronic Copies of

I/O cable

SBE 37-SMP MicroCAT

Unpacking MicroCAT

Shown below is a typical MicroCAT shipment.

and o-ring kit

Conductivity cell cleaning

solution (Triton-X)

Software Manuals and User Manual

Batteries

Manual revision 019 Section 1: Introduction SBE 37-SMP RS-232

Spares

January 1, 2013

UN #

UN3091

Packing Instruction (PI) #

969

Passenger Aircraft

Yes

Cargo Aircraft

Yes

Labeling Requirement

1 **

1, 2 **

Airway Bill (AWB)

Requirement

BATTERY PACKAGI NG

DISCLAIMER / WARNING:

Regulations for complete information on packaging, labeling, and shipping document requirements.

Note:

Shipping Precautions

The shipping information provided in is a general overview of lithium battery shipping requirements; it does not provide complete shipping information. The information is provided as a courtesy, to be used as a guideline to assist properly trained shippers. These materials do not alter, satisfy, or influence any federal or state requirements. These materials are subject to change due to changes in government regulations. Sea-Bird accepts no liability for loss or damage resulting from changes, errors, omissions, or misinterpretations of these materials. See the current edition of the IATA Dangerous Good

WARNING!

Do not ship assembled battery pack.

Assembled battery pack

For its main power supply, the MicroCAT uses twelve 3.6-volt AA lithium batteries (Saft LS14500). The MicroCAT was shipped from the factory with the batteries packaged separately within the shipping box (not inside MicroCAT).

Batteries are packed in heat-sealed plastic,

and then placed in bubble-wrap outer

sleeve and strong packaging for shipment.

If the shipment is not packaged as described above, or does not meet the requirements below, the shipment is considered Dangerous/Hazardous Goods, and must be shipped according to those rules.

* AWB must contain following information in Nature and Quantity of Goods Box: “Lithium Metal Batteries”, “Not Restricted”, “PI #” ** Labels are defined below:

Remove the batteries before returning the MicroCAT to Sea-Bird. Do not return used batteries when shipping the MicroCAT for calibration or repair. All setup information is preserved when the batteries are removed.

1-5 MicroCATs

and associated

batteries,

but no spares

Yes * Yes *

xxx.xxxx.xxxx

– Shipper must provide an

emergency phone number

1-5 MicroCATs and

associated batteries,

plus up to 2 spare

battery sets/MicroCAT

(without MicroCATs) –

Note new rules as of

Must be shipped as

Class 9 Dangerous Goods.

If re-shipping spares, you must have your

own Dangerous Goods program.

Install batteries in the MicroCAT for testing (see Battery Installation in Section 3). If you will re-ship the MicroCAT after testing:

1. Remove the battery pack assembly from the MicroCAT.

2. Remove the batteries from the battery pack assembly.

3. Pack the batteries properly for shipment, apply appropriate labels, and

prepare appropriate shipping documentation.

Manual revision 019 Section 2: Description of MicroCAT SBE 37-SMP RS-232

Optional plastic

Section 2: Description of MicroCAT

This section describes the functions and features of the SBE 37-SMP MicroCAT, including specifications, dimensions, end cap connectors, sample timing, battery endurance, and external power.

System Description

ShallowCAT housing

For most applications, deploy in orientation shown (connector end down) for proper operation – see Optimizing Data Quality / Deployment Orientation in Section4: Deploying and Operating MicroCAT

The SBE 37-SMP MicroCAT is a high-accuracy conductivity and temperature recorder (pressure optional) with internal battery and non-volatile memory, an integral pump, and a standard RS-232 serial interface. Designed for moorings and other long-duration, fixed-site deployments, MicroCATs have noncorroding titanium housings rated for operation to 7000 meters (23,000 feet) or pressure sensor full-scale range. An optional plastic ShallowCAT housing rated for 350 meters (1150 feet) is also available.

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:

• Autonomous sampling – At pre-programmed intervals, the MicroCAT

wakes up, runs the pump, samples, stores the data in its FLASH memory,

and goes to sleep. If desired, real-time data can also be transmitted.

• Polled sampling – On command, the MicroCAT runs the pump, takes one

sample, and transmits the data. Polled sampling is useful for integrating

the MicroCAT with satellite, radio, or wire telemetry equipment.

• Serial line sync – In response to a pulse on the serial line, the MicroCAT

wakes up, runs the pump, samples, stores the data in its FLASH memory,

and goes to sleep. If desired, real-time data can also be transmitted. Serial

line sync provides an easy method for synchronizing MicroCAT sampling

with other instruments such as Acoustic Doppler Current Profilers

(ADCPs) or current meters, without drawing on their battery or memory

resources.

The MicroCAT can be deployed in two ways:

• Cable installed – The MicroCAT can be remotely controlled, allowing for

polled sampling or serial line sync, or for periodic requests of data from

the MicroCAT memory. If desired, data can be periodically uploaded

while the MicroCAT remains deployed. Additionally, the MicroCAT can

be externally powered.

• Dummy plug installed – The MicroCAT cannot be remotely controlled.

Autonomous sampling is programmed before deployment, and data is

uploaded after recovery.

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 Seacat and Seacat plus family. 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.

Notes:

Intake

Exhaust

Air bleed

Anti-Foulant

Conductivity

Thermistor

Shown with conductivity

Manual revision 019 Section 2: Description of MicroCAT SBE 37-SMP RS-232

The MicroCAT’s internal-field conductivity cell is immune to proximity errors and unaffected by external fouling. The conductivity cell guard retains the

hole in top

expendable AF24173 Anti-Foulant Devices at the conductivity cell intake and pump exhaust.

The MicroCAT’s integral pump runs for 1.0 second each time the MicroCAT takes a sample, providing the following advantages over a non-pumped system:

• Improved conductivity response – The pump flushes the previously

sampled water from the conductivity cell and brings a new water sample

quickly into the cell.

cell

• Reduced fouling – Water does not freely flow through the conductivity

cell between samples, minimizing fouling.

Note that the MicroCAT was designed to be deployed as shown, with the sensor end up, providing an inverted U-shape for the flow. This orientation

prevents sediment from being trapped in the pump impeller housing. An air

Devices

bleed hole in the top of the duct allows air to escape from the plumbing, so the pump will prime. See Optimizing Data Quality / Deployment Orientation in Section 4: Deploying and Operating MicroCAT.

The MicroCAT’s optional strain-gauge pressure sensor is available in the following pressure ranges: 20, 100, 350, 600, 1000, 2000, 3500, and 7000 meters. Compensation of the temperature influence on pressure offset

cell guard removed

and scale is performed by the MicroCAT’s CPU.

Future upgrades and enhancements to the MicroCAT firmware can be easily installed in the field through a computer serial port and the bulkhead connector on the MicroCAT, without the need to return the MicroCAT to Sea-Bird.

The MicroCAT is supplied with a powerful software package, Seasoft

V2,

which includes:

• Help files provide detailed information on the software.

• A separate software manual on CD-ROM contains detailed information on the setup and use of SBE Data Processing.

• Sea-Bird supplies the current version of our software when you purchase an instrument. As software revisions occur, we post the revised software on our FTP site. See our website (www.seabird.com) for the latest software version number, a description of the software changes, and instructions for downloading the software from the FTP site.

• Deployment Endurance Calculator– program for determining

deployment length based on user-input deployment scheme, instrument power requirements, and battery capacity.

• SeatermV2 – terminal program for easy communication and data

retrieval. SeatermV2 is a launcher, and launches the appropriate terminal program for the selected instrument (Seaterm232 for RS-232 instruments such as this MicroCAT).

• SBE Data Processing - program for calculation and plotting of

conductivity, temperature, pressure (optional), and derived variables such as salinity and sound velocity.

Manual revision 019 Section 2: Description of MicroCAT SBE 37-SMP RS-232

Nominal 7.8 Amp-hour pack consisting of 12 AA Saft LS 14500 lithium

Note:

CAUTION:

Specifications

Pressure ranges are expressed in meters of deployment depth capability.

Measurement

Range

Initial

Accuracy

Typical

Stability

Resolution

Sensor

Calibration

Memory

Data

Storage

Real-Time

Clock

Temperature

(°C)

-5 to +35

± 0.002

0.0002

per month

0.0001

+1 to +32

8 Mbyte non-volatile FLASH memory

Conductivity & temperature: 6 bytes per sample (3 bytes each) Time: 4 bytes per sample. Pressure (optional): 5 bytes per sample.

Recorded Parameters Memory Space (number of samples)

C, T, and time 800,000 C, T, P, and time 533,000

32,768 Hz TCXO accurate to ±1 minute/year.

Conductivity

(S/m)

0 to 7

(0 to 70 mS/cm)

± 0.0003

(0.003 mS/cm)

0.0003

(0.003 mS/cm)

per month

0.00001

(0.0001 mS/cm)

0 to 6; physical calibration

over range 2.6 to 6 S/m,

plus zero conductivity (air)

Optional

Pressure

0 to full scale range:

20 / 100 / 350 / 600 /

1000 / 2000 / 3500 /

7000 meters

± 0.1% of

full scale range

0.05% of

full scale range

per year

0.002% of

full scale range

Ambient pressure to

full scale range in

5 steps

Internal

Batteries

External

Power

Requirements

See Section 5: Routine Maintenance and Calibration for

handling instructions for the plastic ShallowCAT housing.

Housing and

Depth Rating

Weight

(with clamps)

batteries (3.6 V and 2.6 Amp-hours each), with 3 strings of 4 batteries. Capacity for more than 380,000 samples for a typical sampling scheme (see Battery Endurance for example calculation). See Shipping Precautions in Section 1: Introduction.

Note: Saft batteries can be purchased from Sea-Bird or other sources. See Saft’s website for suppliers (www.saftbatteries.com). Alternatively, substitute either of the following:

- Tadiran TL-4903, AA (3.6 V and 2.4 Amp-hours each) (www.tadiran.com)

- Electrochem 3B0064/BCX85, AA (3.9 V and 2.0 Amp-hours each) (www.electrochemsolutions.com)

0.25 Amps at 9 - 24 VDC. To avoid draining internal batteries, use an external voltage greater than 10 VDC. See External Power.

• Quiescent current: 30 microAmps.

• Communication current: 4.3 milliAmps.

• Acquisition current (excluding pump):

- 9.1 milliAmps if transmitting real-time data.

- 7.9 milliAmps if not transmitting real-time data.

• Pump current: 25.3 milliAmps (0.025 Amp-second per 1.0 second pulse)

Acquisition time: 1.9 – 2.9 seconds per sample (depending on sampling mode and inclusion of pressure sensor, see Sample Timing).

Standard: Titanium housing rated at 7000 m (23,000 ft) Optional: Plastic housing rated at 350 m (1150 ft)

Standard titanium housing: 3.7 kg (8.3 lbs) in air, 2.2 kg (4.8 lbs) in water Optional plastic housing: 3.4 kg (7.5 lbs) in air, 1.6 kg (3.5 lbs) in water

Manual revision 019 Section 2: Description of MicroCAT SBE 37-SMP RS-232

Note:

Dimensions and End Cap Connector

For most applications, deploy in the orientation shown (connector end down) for proper operation.

Manual revision 019 Section 2: Description of MicroCAT SBE 37-SMP RS-232

Cables and Wiring

Manual revision 019 Section 2: Description of MicroCAT SBE 37-SMP RS-232

Notes:

storage limitations.

Example: A MicroCAT with pressure sensor is set up to sample autonomously every 5 minutes (12 samples/hour), and

Notes:

Sample Timing

• Acquisition time shown does not include time to transmit real-time data, which is dependent on baud rate (BaudRate=) and number of characters being transmitted (defined by OutputFormat=, OutputSal=, and OutputSV=).

• Time stored and output with the data is the time at the start of the sample, after a small amount of time for the MicroCAT to wake up, run the pump, and prepare to sample. For example, if the MicroCAT is programmed to wake up and sample at 12:00:00, the stored time will indicate 12:00:01 or 12:00:02.

Sample timing is dependent on several factors, including sampling mode and whether the MicroCAT has an optional pressure sensor. The pump runs for

1.0 second while the Wein bridge is stabilizing before each measurement.

Autonomous Sampling (time between samples = SampleInterval) or Serial Line Sync Sampling

Power on time for each sample while logging, if not transmitting real-time data:

• Without pressure: power-on time = 1.9 seconds to run pump and sample

• With pressure: power-on time = 2.6 seconds to run pump and sample

Power on time for each sample while logging, if transmitting real-time data:

• Without pressure: power-on time = 2.2 seconds to run pump and sample

• With pressure: power-on time = 2.9 seconds to run pump and sample

Polled Sampling

Time from receipt of take sample command to beginning of reply:

• Without pressure: power-on time = 1.9 seconds to run pump and sample

• With pressure: power-on time = 2.6 seconds to run pump and sample

Battery Endurance

• If the MicroCAT is logging data and

the battery voltage is less than

7.1 volts for five consecutive scans, the MicroCAT halts logging.

Sea-Bird recommends using the

•

capacity value of 6.0 Amp-hours for the Saft batteries as well as for the alternate battery types (Tadiran TL-4903 and Electrochem 3B0064/BCX85 AA).

This MicroCAT uses a battery pack

•

with a yellow cover plate. Older MicroCATs used a battery pack with a red cover plate; the wiring of the red battery pack is different from this one, and cannot be used with this MicroCAT.

See Specifications above for data

•

is not transmitting real-time data. How long can it be deployed?

Sampling time (autonomous sampling, with pressure sensor) = 2.6 seconds Sampling current consumption = 0.0079 Amps * 2.6 seconds = 0.021 Amp-seconds/sample In 1 hour, sampling current consumption = 12 * 0.021 Amp-seconds/sample = 0.25 Amp-seconds/hour Pump current consumption = 0.025 Amp-seconds/pulse In 1 hour, pump current consumption = 12 * 0.025 Amp-seconds/pulse = 0.3 Amp-seconds/hour Quiescent current = 30 microAmps = 0.03 mA

In 1 hour, quiescent current consumption ≈ 0.03 mA * 3600 seconds/hour = 0.11 Amp-seconds/hour Total current consumption / hour = 0.25 + 0.3 + 0.11 = 0.66 Amp-seconds/hour

Capacity = (6.0 Amp-hours * 3600 seconds/hr) / (0.66 Amp-seconds/hour) = 32727 hours = 1363 days = 3.7 years

However, Sea-Bird recommends that batteries should not be expected to last longer than 2 years in the field.

Number of samples = 32,000 hours * 12 samples/hour = 380,000 samples

The battery pack (4 batteries in series, 3 parallel strings) has a nominal capacity of 7.8 Amp-hours (2.6 Amp-hours * 3). For planning purposes, to account for the MicroCAT’s current consumption patterns and for environmental conditions affecting battery performance, Sea-Bird recommends using a conservative value of 6.0 Amp-hours.

Acquisition current varies, depending on whether the MicroCAT is transmitting real-time data: 9.1 mA if transmitting real-time data, 7.9 mA if not. Pump current is 0.025 Amp-seconds per pulse (1.0 second pulse). Quiescent current is 30 microAmps (0.26 Amp-hours per year).

Acquisition time is shown above in Sample Timing. The time required for each sample is dependent on the user-programmed sampling mode, and inclusion of a pressure sensor in the MicroCAT. So, battery endurance is highly dependent on the application. An example is shown below. You can use the Deployment Endurance Calculator to determine the maximum deployment length, instead of performing the calculations by hand.

Manual revision 019 Section 2: Description of MicroCAT SBE 37-SMP RS-232

Note:

28 0.0653

Note:

Example 1 – For 20 gauge wire, what is maximum distance to transmit power to MicroCAT if transmitting real-time data?

External Power

The MicroCAT can be powered from an external source that supplies

0.25 Amps at 9-24 VDC. The internal lithium pack is diode-OR’d with the external source, so power is drawn from whichever voltage source is higher. The MicroCAT can also be operated from the external supply without having the lithium batteries installed. Electrical isolation of conductivity prevents ground loop noise contamination in the conductivity measurement.

Cable Length and External Power

See Real-Time Data Acquisition in Section 4: Deploying and Operating MicroCAT for baud rate limitations on cable length if transmitting real-time data.

Common wire resistances:

Gauge Resistance (ohms/foot)

12 0.0016 14 0.0025 16 0.0040 18 0.0064 19 0.0081 20 0.0107 22 0.0162 24 0.0257 26 0.0410

There are two issues to consider if powering the MicroCAT externally:

• Limiting the communication IR loss to 1 volt if transmitting real-time

data; higher IR loss will cause the instrument to transmit data that does

not meet the RS-232 communication standard.

• Supplying enough power at the power source so that sufficient power is

available at the instrument after considering IR loss.

Each issue is discussed below.

Limiting Communication IR Loss to 1 Volt if Transmitting Real-Time Data

The limit to cable length is typically reached when the maximum communication current times the power common wire resistance is more than 1 volt.

= 1 volt = IR

limit

Maximum cable length = R

limit

/ wire resistance per foot

limit

where I = communication current required by MicroCAT (4.3 milliAmps; see Specifications).

For 4.3 milliAmp communications current, R For 20 gauge wire, resistance is 0.0107 ohms/foot. Maximum cable length = 232 ohms / 0.0107 ohms/foot = 21734 feet = 6626 meters

Example 2 – Same as above, but there are 4 MicroCATs powered from the same power supply. For 4.3 milliAmp communications current, R Maximum cable length = 58 ohms / 0.0107 ohms/foot = 5433 feet = 1656 meters (to MicroCAT furthest from power source)

limit

= V

/ I = 1 volt / 0.0043 Amps = 232 ohms

limit

= V

/ I = 1 volt / (0.0043 Amps * 4 MicroCATs) = 58 ohms

limit

Manual revision 019 Section 2: Description of MicroCAT SBE 37-SMP RS-232

Example 1 – For 20 gauge wire, what is maximum distance to transmit power to MicroCAT if using 12 volt power source

Supplying Enough Power to MicroCAT

Another consideration in determining maximum cable length is supplying enough power at the power source so that sufficient voltage is available, after IR loss in the cable (from the 0.25 Amp turn-on transient, two-way resistance), to power the MicroCAT. The power requirement varies, depending on whether any power is drawn from the batteries:

• Provide at least 10 volts, after IR loss, to prevent the MicroCAT from

drawing any power from the batteries (if you do not want to draw down the batteries): V - IR > 10 volts

• Provide at least 9 volts, after IR loss, if allowing the MicroCAT to draw

down the batteries or if no batteries are installed: V - IR > 9 volts

where I = MicroCAT turn-on transient (0.25 Amps; see Specifications).

and deploying MicroCAT with no batteries? V - IR > 9 volts 12 volts - (0.25 Amps) * (0.0107 ohms/foot * 2 * cable length) > 9 volts 3 volts > (0.25 Amps) * (0.0107 ohms/foot * 2 * cable length) Cable length < 560 ft = 170 meters Note that 170 m << 6626 m (maximum distance if MicroCAT is transmitting real-time data), so IR drop in power is controlling factor for this example. Using a higher voltage power supply or a different wire gauge would increase allowable cable length.

Example 2 – Same as above, but there are 4 MicroCATs powered from same power supply. V - IR > 9 volts 12 volts - (0.25 Amps * 4 MicroCATs) * (0.0107 ohms/foot * 2 * cable length) > 9 volts 3 volts > (0.25 Amps * 4 MicroCATs) *(0.0107 ohms/foot * 2 * cable length) Cable length < 140 ft = 42 meters (to MicroCAT furthest from power source)

Manual revision 019 Section 3: Preparing MicroCAT for Deployment SBE 37-SMP RS-232

WARNING!

CAUTION:

Batteries in heat-sealed plastic, bubble-

removed)

Cable

O-rings

Twist end cap

Section 3: Preparing MicroCAT for Deployment

This section describes the pre-check procedure for preparing the MicroCAT for deployment. Installation of the battery pack, installation of Sea-Bird software, and testing power and communications are discussed.

Battery Installation

Do not ship the MicroCAT with batteries installed. See Shipping Precautions in Section 1: Introduction.

wrap outer sleeve, and strong packaging.

See Section 5: Routine Maintenance and Calibration for handling instructions for the plastic ShallowCAT housing.

2 screws securing connector end cap (screws shown partially

mounting guide

Description of Batteries and Battery Pack

Sea-Bird supplies twelve 3.6-volt AA lithium batteries, shipped with the MicroCAT in a heat-sealed plastic bag placed in bubble wrap and a cardboard box. The empty battery holder is installed inside the MicroCAT for shipment.

No soldering is required when assembling the battery pack.

Installing Batteries

1. Remove the I/O connector end cap: A. Wipe the outside of the I/O end cap and housing dry, being careful to

remove any water at the seam between them.

B. Remove the 2 cap screws on the sides of the housing. Do not remove

any other screws. Note: Sea-Bird ships the MicroCAT with a 9/64-inch Allen wrench for these screws.

C. Remove the I/O end cap by twisting the end cap counter clockwise;

the end cap will release from the housing. Pull the end cap out.

D. The end cap is electrically connected to the electronics with a 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.

counter clockwise, twisting cap screw out of machined slot; end cap releases from housing.

Molex connector

Handle

Loosen

Roll

Align pin in cover

Pins on

Manual revision 019 Section 3: Preparing MicroCAT for Deployment SBE 37-SMP RS-232

2. Remove the battery pack assembly from the housing: A. Loosen the captured screw from the battery cover plate, using the

7/64-inch Allen wrench included with the shipment.

B. Lift the battery pack assembly straight out of the housing, using

the handle.

captured screw

3. Keep the handle in an upright position. Holding the edge of the yellow cover plate, unscrew the cover plate from the battery pack assembly. Note: Older MicroCATs used a battery pack with a red cover plate; the wiring of that pack is different from this one, and cannot be used with this MicroCAT.

4. Roll the 2 O-rings on the outside of the battery pack out of their grooves.

Roll 2 O-rings out of grooves

5. Insert each battery into the pack, alternating positive (+) end first and negative (-) end first to match the labels on the pack.

6. Roll the 2 O-rings on the outside of the battery pack into place in the grooves. The O-rings compress the side of the battery pack and hold the batteries tightly in place in the pack.

7. Reinstall the battery pack cover plate: A. Align the pin on the battery cover plate PCB with the post hole in the

battery pack housing.

B. Place the handle in an upright position. Screw the yellow cover plate

onto the battery pack assembly. Ensure the cover is tightly screwed

2 O-rings into grooves after inserting batteries

on to provide a reliable electrical contact.

plate with post hole

in battery pack

8. Replace the battery pack assembly in the housing: A. Align the D-shaped opening in the cover plate with the pins on the

shaft. Lower the assembly slowly into the housing, and once aligned, push gently to mate the banana plugs on the battery compartment bulkhead with the lower PCB. A post at the bottom of the battery compartment mates with a hole in the battery pack’s lower PCB to prevent improper alignment.

B. Secure the assembly to the shaft with the captured screw, using the

7/64-inch Allen wrench. Ensure the screw is tight to provide a reliable electrical contact.

shaft

9. Reinstall the I/O connector end cap: A. Remove any water from the 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.

B. Plug the female end of the Molex connector onto the pins. C. Carefully fit the end cap into the housing until the O-rings are

fully seated.

D. Reinstall the cap screws to secure the end cap.

Manual revision 019 Section 3: Preparing MicroCAT for Deployment SBE 37-SMP RS-232

Notes:

Locking sleeve I/O cable

Software Installation

Seasoft V2 was designed to work with a PC running Windows XP service

• Help files provide detailed information on the software. A separate software manual on the CD-ROM contains detailed information on SBE Data Processing.

• It is possible to use the MicroCAT without the SeatermV2 terminal program by sending direct commands from a dumb terminal or terminal emulator, such as Windows HyperTerminal.

pack 2 or later, Windows Vista, or Windows 7.

If not already installed, install Sea-Bird software programs on your computer using the supplied software CD:

1. Insert the CD in your CD drive.

2. Install software: Double click on SeasoftV2.exe. Follow the dialog box

directions to install the software. The installation program allows you to install the desired components. Install all the components, or just install Deployment Endurance Calculator (battery endurance calculator), SeatermV2 (terminal program launcher for the MicroCAT), and SBE Data Processing (data processing).

The default location for the software is c:\Program Files\Sea-Bird. Within that folder is a sub-directory for each program.

Power and Communications Test

The power and communications test will verify that the system works, prior to deployment.

Test Setup

1. Remove dummy plug (if applicable): A. By hand, unscrew the locking sleeve from the MicroCAT’s bulkhead

connector. If you must use a wrench or pliers, be careful not to loosen the bulkhead connector instead of the locking sleeve.

B. Remove the dummy plug from the MicroCAT’s I/O bulkhead

connector by pulling the plug firmly away from the connector.

2. Standard Connector - Install the I/O cable connector, aligning the raised bump on the side of the connector with the large pin (pin 1 - ground) on the MicroCAT. OR MCBH Connector – Install the I/O cable connector, aligning the pins.

3. Connect the I/O cable connector to your computer’s serial port.

Manual revision 019 Section 3: Preparing MicroCAT for Deployment SBE 37-SMP RS-232

If uploading

If sending XML script

Capture

Progress bar for

uploading data

Status –

Upload, etc.

Send Commands

Menus

Note:

Test

Note:

See SeatermV2’s Help files.

See Seaterm232’s Help files.

1. Double click on SeatermV2.exe. The main screen looks like this:

SeatermV2 is a launcher, and launches the appropriate terminal program for the selected instrument.

2. In the Instruments menu, select SBE 37 RS232. Seaterm232 opens; the main screen looks like this:

Window

Command/Data Echo Area

Status Bar

Ready,

Uploading,

Finished

- upload file name.

– script file name

status

• Menus – For tasks and frequently executed instrument commands.

• Send Commands window – Contains commands applicable to your

MicroCAT. The list appears after you connect to the MicroCAT.

• Command/Data Echo Area – Title bar of this window shows

Seaterm232’s current comm port and baud rate. Commands and the MicroCAT responses are echoed here. Additionally, a command can be manually typed or pasted (ctrl + V) here. Note that the MicroCAT must be connected and awake for it to respond to a command.

• Status bar – Provides connection, upload, script, and capture status

information.

Manual revision 019 Section 3: Preparing MicroCAT for Deployment SBE 37-SMP RS-232

Description

Equivalent Command*

• Load command file – opens selected .XML

Exit - Exit program.

• Configure – Establish communication

if instrument has stopped responding.

Command

computer.

Capture instrument responses on screen to

Capture status displays in Status bar.

Upload data stored in memory, in a format

Several status commands

SBE Data Processing)

• Diagnostics log - Keep a diagnostics log.

same setup.

Note:

software to 1.1b or later.

Note:

Following is a description of the menus:

command file, and fills Send Commands window with commands.

File

• Unload command file – closes command

file, and removes commands from Send Commands window.

•

parameters (comm port and baud rate).

• Connect – connect to comm port.

Communications

• Disconnect – disconnect from

comm port.

• Disconnect and reconnect – may be useful

Set local time and Set UTC time are disabled if

the baud rate in Seaterm232 is set to 115200, because the software cannot reliably set the time at that baud.

SeatermV2 with version <

1.1 did not convert the uploaded .xml data file to a .hex and .xmlcon file. Convert .XML data file in the Tools menu was used to convert the .xml data file to a .cnv file, which could be processed in SBE Data Processing. We recommend that you update your SeatermV2

• Abort – interrupt and stop MicroCAT’s

response.

• (press Esc key several

times for Abort)

• Send 5 second break (for use with Serial

Line Sync mode).

• Send stop command.

• Set local time– Set date and time to time

• Stop

• DateTime=

sent by timekeeping software on your computer; accuracy ± 25 msec of time provided by computer.

• Set UTC Time (Greenwich Mean Time) –

• DateTime=

Set date and time to time sent by timekeeping software on your computer; accuracy ± 25 msec of time provided by

file, to save real-time data or use for

Capture

diagnostics. File has .cap extension. Click

—

Capture menu again to turn off capture.

Upload

that Sea-Bird’s data processing software can use. Uploaded data has .xml extension, and is then automatically converted to a .hex and a .xmlcon file that can be used in SBE Data Processing’s Data Conversion module. Before using Upload: stop logging by sending Stop.

and appropriate data

upload command as

applicable to user

selection of range of data

to upload (use Upload

menu if you will be

processing data with

• Convert .XML data file – Using Upload

menu automatically does this conversion; tool is available if there was a problem

Tools

with the automatic conversion.

• Send script – Send XML script to

MicroCAT. May be useful if you have a number of MicroCATs to program with

*See Command Descriptions in Section 4: Deploying and Operating MicroCAT.

Manual revision 019 Section 3: Preparing MicroCAT for Deployment SBE 37-SMP RS-232

Note:

Computer COM port and baud rate for

through all available baud rates.

3. If this is the first time Seaterm232 is being used, the configuration dialog

box displays:

communication between computer and MicroCAT. Seaterm232 tries to connect at this baud rate, but if unsuccessful will cycle

Update COM Port pulldown to include connected USB ports.

Make the desired selections, and click OK.

4. Seaterm232 tries to automatically connect to the MicroCAT. As it

Seaterm232’s baud rate must be the same as the MicroCAT baud rate (set with BaudRate=). Baud is factory-set to 9600, but can be changed by the user (see Command Descriptions in

Section 4: Deploying and Operating MicroCAT). Other communication

parameters – 8 data bits, 1 stop bit, and no parity – cannot be changed.

connects, it sends GetHD and displays the response, which provides factory-set data such as instrument type, serial number, and firmware version. Seaterm232 also fills the Send Commands window with the correct list of commands for your MicroCAT. If there is no communication: A. In the Communications menu, select Configure. The Serial Port

Configuration dialog box appears. Select the Comm port and baud rate for communication, and click OK. Note that the factory-set baud rate is documented on the Configuration Sheet.

B. In the Communications menu, select Connect (if Connect is grayed

out, select Disconnect and reconnect). Seaterm232 will attempt to connect at the baud specified in Step A, but if unsuccessful will then cycle through all other available baud rates.

C. If there is still no communication, check cabling between the

computer and MicroCAT, and try to connect again.

D. If there is still no communication, repeat Step A with a different

comm port, and try to connect again.

If OutputExecutedTag=Y, the MicroCAT does not provide an S> prompt after the <Executed/> tag at the end of a command response.

After Seaterm232 displays the GetHD response, it provides an S> prompt to indicate it is ready for the next command.

Manual revision 019 Section 3: Preparing MicroCAT for Deployment SBE 37-SMP RS-232

Click on desired command

Help box describes

detail.

Enter any command

these boxes.

Click Execute when ready

command.

This box

Taking a look at the Send Commands window:

description in list.

selected command in more

arguments (such as starting and ending sample number for upload) in

to send selected

You can use the Send Commands window to send commands, or simply type the commands in the Command/Data Echo area if desired.

shows selected command.

Manual revision 019 Section 3: Preparing MicroCAT for Deployment SBE 37-SMP RS-232

Notes:

CAUTION:

5. Display MicroCAT status information typing DS and pressing the

• The status display indicates

SBE37-SM because the 37-SMP uses the same firmware as the 37-SM.

• The MicroCAT automatically enters quiescent (sleep) state after 2 minutes without receiving a command. This timeout algorithm is designed to conserve battery energy if the user does not send QS to put the MicroCAT to sleep. If the system does not appear to respond, select Connect in the Communications menu to reestablish communications.

SBE37SM-RS232 4.1 SERIAL NO. 9999 24 Apr 2012 09:48:50 vMain = 13.21, vLith = 3.08 samplenumber = 77, free = 559163 not logging, stop command sample interval = 15 seconds data format = converted engineering transmit real-time = yes sync mode = no pump installed = yes, minimum conductivity frequency = 3000.0

Enter key. The display looks like this:

6. Command the MicroCAT to take a sample by typing TS and pressing the

Enter key. The display looks like this (if optional pressure sensor installed, OutputFormat=1, and you are not outputting salinity or

The MicroCAT alwa ys runs the pump in response to polled sampling commands (TS, etc.), regardless of the conductivity frequency from the last sample and the setting for

MinCondFreq=. Do not run the pump dry. The pump

is water lubricated; running it without water will damage it. If briefly testing your system with polled sampling commands in dry conditions, orient the MicroCAT to provide an upright U-shape for the plumbing. Then fill the inside of the pump head with water via the pump exhaust tubing. This will provide enough lubrication to prevent pump damage during brief testing.

sound velocity):

23.7658, 0.00019, 0.062, 24 Apr 2012, 09:51:30

where 23.7658 = temperature in degrees Celsius

0.00019 = conductivity in S/m

0.062 = pressure in decibars 24 Apr 2012 = date 09:51:30 = time

These numbers should be reasonable; i.e., room temperature, zero conductivity, barometric pressure (gauge pressure), current date and time (shipped from the factory set to Pacific Daylight or Standard Time).

7. Command the MicroCAT to go to sleep (quiescent state) by typing QS

and pressing the Enter key.

The MicroCAT is ready for programming and deployment.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Note:

Section 4: Deploying and Operating MicroCAT

This section includes:

• system operation with example sets of operation commands

• baud rate and cable length considerations

• timeout description

• detailed command descriptions

• data output formats

• optimizing data quality / deployment orientation

• deploying and recovering the MicroCAT

• uploading and processing data from the MicroCAT’s memory

Sampling Modes

The MicroCAT has three basic sampling modes for obtaining data:

• Polled Sampling – On command, the MicroCAT runs the pump, takes one

sample, and transmits data.

• Autonomous Sampling – At pre-programmed intervals, the MicroCAT

wakes up, runs the pump, samples, stores data in memory, and goes to sleep. Data is transmitted real-time if TxRealTime=Y.

• Serial Line Synchronization – In response to a pulse on the serial line, the

MicroCAT wakes up, runs the pump, samples, stores data in memory, and goes to sleep. Data is transmitted real-time if TxRealTime=Y.

Commands can be used in various combinations to provide a high degree of operating flexibility.

The integral pump runs for 1.0 second before every sample measurement. The

In autonomous sampling and serial line sync modes, the pump runs only if the conductivity frequency from the last sample was greater than the minimum conductivity frequency for running the pump (MinCondFreq=). Checking the conductivity frequency prevents the pump from running in air for long periods of time, which could damage the pump. See Command Descriptions for details on setting the minimum conductivity frequency.

pump flushes the previously sampled water from the conductivity cell and brings a new water sample quickly into the cell. Water does not freely flow through the conductivity cell between samples, minimizing fouling.

Descriptions and examples of the sampling modes follow. 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 described in Command Descriptions before setting up your system.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Example: Polled Sampling (user input in bold)

CAUTION:

Polled Sampling

Do not run the pump dry. The pump

is water lubricated; running it without water will damage it. If briefly testing your system in dry conditions, orient the MicroCAT to provide an upright U-shape for the plumbing. Then fill the inside of the pump head with water via the pump exhaust tubing. This will provide enough lubrication to prevent pump damage during brief testing.

Wake up MicroCAT. Set current date and time to December 1, 2012 9 am. Set up to send data in converted decimal format, and include salinity with data. Command MicroCAT to take a sample, and send data to computer (do not store data in MicroCAT’s memory). Send power-off command.

(Select Connect in Seaterm232’s Communications menu to connect and wake up.)

DATETIME=12012012090000 OUTPUTFORMAT=1 OUTPUTSAL=Y GETCD (to verify setup)

TS (Pump runs for 1.0 second before measurement.) QS

When ready to take a sample (repeat as desired): wake up MicroCAT, command it to take a sample and output data, and send power-off command.

(Before first sample, click Capture menu to capture data to a file – Seaterm232 requests file name for data to be stored.) (Select Connect in Seaterm232’s Communications menu to connect and wake up.)

TS (Pump runs for 1.0 second before measurement.) QS

On command, the MicroCAT takes a measurement (running the pump for

1.0 second before the measurement), and sends the data to the computer. Storing of data in the MicroCAT’s FLASH memory is dependent on the particular command used.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Example: Autonomous Sampling (user input in bold).

Notes:

Autonomous Sampling (Logging commands)

At pre-programmed intervals (SampleInterval=) the MicroCAT wakes up, runs the pump for 1.0 second (if the conductivity frequency from the last sample was greater than MinCondFreq=), samples data, stores the data in its FLASH memory, and goes to sleep (enters quiescent state). Logging is started with StartNow or StartLater, and is stopped with Stop. Transmission of real-

• If the FLASH memory is filled to capacity, sampling continues, but excess data is not saved in memory (i.e., the MicroCAT does not overwrite the data in memory).

• Use Stop to:

 stop logging.  stop waiting to start logging (after

StartLater has been sent). Once Stop is sent, the MicroCAT will accept all commands again.

time data to the computer is dependent on TxRealTime.

The MicroCAT has a lockout feature to prevent unintended interference with sampling. If the MicroCAT is logging or is waiting to start logging (StartLater has been sent, but logging has not started yet), the MicroCAT will only accept the following commands: GetCD, GetSD, GetCC, GetEC, GetHD, DS, DC, TS, TSH, SL, SLT, QS, and Stop.

Additionally, if the MicroCAT is logging, it cannot be interrupted during a measurement to accept any commands. If the MicroCAT is logging and appears unresponsive, it may be in the middle of taking a measurement; continue to try to establish communications.

If transmitting real-time data, keep the signal line open circuit or within ± 0.3 V relative to ground to minimize power consumption when not trying to send commands.

Wake up MicroCAT. Initialize logging to overwrite previous data in memory. Set current date and time to May 1, 2012 9 am. Set up to sample every 60 seconds. Do not transmit real-time data to computer. Set up to automatically start logging on 10 May 2012 at 12:00:00. Send power-off command after all parameters are entered – system will automatically wake up and go to sleep for each sample.

(Select Connect in Seaterm232’s Communications menu to connect and wake up.)

INITLOGGING DATETIME=05012012090000 SAMPLEINTERVAL=60 TXREALTIME=N STARTDATETIME=05102012120000 STARTLATER GETCD (to verify setup)

GETSD (to verify status is waiting to start logging) QS

After logging begins, look at data from last sample to check results, and then go to sleep:

(Select Connect in Seaterm232’s Communications menu to connect and wake up.)

SL QS

When ready to upload all data to computer, wake up MicroCAT, stop sampling, upload data, and then go to sleep: (Select Connect in Seaterm232’s Communications menu to connect and wake up.)

STOP

(Click Upload menu – Seaterm232 leads you through screens to define data to be uploaded and where to store it.)

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Note:

Example: Serial Line Sync (user input in bold)

Note:

(greater than 3 volts) for 5 seconds.

Serial Line Synchronization (Serial Line Sync)

Serial Line Sync allows a simple pulse (a single character) on the RS-232 line to initiate a sample. This mode provides easy integration with ADCPs or

Use GetCD or DS to view Serial Line Sync enable/disable status.

Send 5 second break holds the RS-232 RX line in space state

current meters, which can synchronize MicroCAT sampling with their own without drawing on their battery or memory resources.

If this mode is enabled (SyncMode=Y), sending a pulse causes the MicroCAT to wake up, run the pump for 1.0 second (if the conductivity frequency from the last sample was greater than MinCondFreq=), take a sample, and store the data in FLASH memory. Transmission of real-time data to the computer is dependent on TxRealTime.

Keep the signal line open circuit or within ± 0.3 V relative to ground to minimize power consumption when not trying to send a pulse to take a sample.

To disable serial line sync, the MicroCAT must be in the space state when the sample is finished. Disable serial sync mode by selecting Send 5 second break in Seaterm232’s Command menu. This sets sync mode to no in the MicroCAT. Then press any key to wake up the MicroCAT. Once serial line sync mode is disabled (SyncMode=N), you can communicate with the MicroCAT using the full range of commands (polled sampling, logging, upload, etc.).

Wake up MicroCAT. Initialize logging to overwrite previous data in memory. Set current date and time to May 1, 2012 9 am. Set up to send data in converted decimal format, and include salinity with data. Set up to transmit real-time data. Set up to transmit real-time data. Enable serial line sync mode. Send power off command.

(Select Connect in Seaterm232’s Communications menu to connect and wake up.)

INITLOGGING DATETIME=05012012090000 OUTPUTFORMAT=1 OUTPUTSAL=Y TXREALTIME=Y SYNCMODE=Y GETCD (to verify setup) QS

When ready to take a sample:

(To save real-time data, click Capture menu to capture data to a file – Seaterm232 requests file name for data to be stored.) Send a pulse – press any key – to wake up, run pump for 1.0 second, take and transmit 1 sample, store in memory, and go to sleep. Repeat as desired.

When ready to upload all data to computer, disable serial line sync mode, and then upload data and go to sleep:

(In Seaterm232’s Command menu, select Send 5 second break. MicroCAT disables serial line sync mode [sets SyncMode=N]. Then press any key.) GETCD (to verify MicroCAT is communicating, and that sync mode is set to no) (Click Upload menu – Seaterm232 leads you through screens to define data to be uploaded and where to store it.)

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Maximum Cable Length (meters)

Maximum Baud Rate

1600

600

800

1200

400

2400

200

4800

100

9600

19200

38400

57600

115200

Notes:

Real-Time Data Acquisition

The length of cable that the MicroCAT can drive is dependent on the baud

• Baud rate is set with

BaudRate=. Set TxRealTime=Y

output real-time data.

See Command Descriptions.

• If using external power, see

External Power in Section 2: Description of MicroCAT

for power limitations on cable length.

rate. Check the capability of your computer and terminal program before increasing the baud; high baud requires a short cable and good PC serial port with an accurate clock. The allowable combinations are:

If acquiring real-time data with Seaterm232, click the Capture menu; enter the desired file name in the dialog box, and click Save. Begin sampling. The data displayed in Seaterm232 will be saved to the designated file. Process the data as desired. Note that this file cannot be processed by SBE Data Processing,

as it does not have the required headers and format for Sea-Bird’s processing software. To process data with SBE Data Processing, upload the

data from the MicroCAT’s memory

Timeout Description

The MicroCAT has a timeout algorithm. If the MicroCAT does not receive a command for 2 minutes, it powers down its communication circuits to prevent exhaustion of the batteries. This places the MicroCAT in quiescent state, drawing minimal current. To re-establish control (wake up), select Connect in Seaterm232’s Communications menu or press the Enter key.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Command Descriptions

This section describes commands and provides sample outputs. Entries made with the commands are permanently stored in the MicroCAT and remain in effect until you change them. See Appendix III: Command Summary for a summarized command list.

When entering commands:

• Input commands to the MicroCAT in upper or lower case letters and

register commands by pressing the Enter key. Note that commands are shown with a mix of upper and lower case for ease in reading (for example, InitLogging), but do not need to be entered that way.

• The MicroCAT sends an error message if an invalid command is entered.

• If a new command is not received within 2 minutes after the completion

of a command, the MicroCAT returns to the quiescent (sleep) state.

• If in quiescent (sleep) state, re-establish communications by selecting

Connect in Seaterm232’s Communications menu or pressing the Enter key.

• If the MicroCAT is transmitting data and you want to stop it, press the

Esc key or type ^C. Then press the Enter key. Alternatively, select Abort in Seaterm232’s Command menu.

• The MicroCAT responds only to GetCD, GetSD, GetCC, GetEC,

GetHD, DS, DC, TS, TSH, SL, SLT, QS, and Stop while sampling

autonomously (StartNow has been sent). If you wake the MicroCAT while it is sampling (for example, to send DS to check on progress), it temporarily stops sampling. Autonomous sampling resumes when it goes back to sleep (either by sending QS or after the 2-minute timeout).

• The MicroCAT responds only to GetCD, GetSD, GetCC, GetEC,

GetHD, DS, DC, TS, TSH, SL, SLT, QS, and Stop while waiting to start

autonomous sampling (StartLater has been sent). To send any other commands, send Stop, send the desired commands to modify the setup, and then send StartLater again.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Example: MicroCAT with a pressure sensor (user input in bold, command used to modify parameter in parentheses).

Notes:

Status Commands

GetCD Get and display configuration data, which

• All the status responses indicate

SBE37-SM because the 37-SMP uses the same firmware as the 37-SM. The internal pump is applicable to the 37-SMP only.

• GetCD output does not include calibration coefficients. To display calibration coefficients, use the GetCC command.

includes parameters related to MicroCAT setup. Most of these parameters can be userinput/modified. List below includes, where applicable, command used to modify parameter:

Device type, Serial number

•

• Optional pressure sensor installed?

• Reference pressure to use in calculations if

no pressure sensor installed (only appears if pressure sensor not installed) [ReferencePressure=]

• Pump installed? Always yes for 37-SMP

• Minimum conductivity frequency for

pump turn-on [MinCondFreq=]

• Output data format [OutputFormat=]

• Output salinity with each sample

[OutputSal=]?

• Output sound velocity with each sample

[OutputSV=]?

• Transmit autonomous and serial line sync

data real-time [TxRealTime=]?

• Interval between samples for continuous

sampling [SampleInterval=]

• Serial sync mode state [SyncMode=]

GETCD <ConfigurationData DeviceType = 'SBE37SM-RS232' SerialNumber = '03709999> <PressureInstalled>yes</PressureInstalled> (inclusion of optional pressure sensor set at factory) <PumpInstalled>yes</PumpInstalled> [only valid setting for 37-SMP] <MinCondFreq>3000.0</MinCondFreq> [MinCondFreq=] <SampleDataFormat>raw Decimal</SampleDataFormat> [OutputFormat=] <OutputSalinity>yes</OutputSalinity> [OutputSal=] <OutputSV>yes</OutputSV> [OutputSV=] <TxRealTime>yes</TxRealTime> [TxRealTime=] <SampleInterval>15</SampleInterval> [SampleInterval=] <SyncMode>no</Syncmode> [SyncMode=] </ConfigurationData>

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Example: (user input in bold, command used to modify parameter in parentheses)

</StatusData>

Status Commands (continued)

GetSD Get and display status data, which contains

data that changes while deployed. List below includes, where applicable, command used to modify parameter:

• Device type, Serial number

• Date and time [DateTime=] in

ISO8601-2000 extended format (yyyy – mm-ddThh:mm:ss)

• Number of recorded events in event

counter [reset with ResetEC]

• Voltages – main battery voltage and back-

up lithium battery voltage

• Memory – [reset with InitLogging]

- Number of bytes in memory

- Number of samples in memory

- Number of additional samples that can be placed in memory

- Length (number of bytes) of each sample

• Logging status –

yes or no (to indicate whether it is currently logging data); if applicable, reason that logging has stopped

getsd <StatusData DeviceType = 'SBE37SM-RS232' SerialNumber = '03709999'> <DateTime>2012-08-20T00:48:32</DateTime> [DateTime=] <EventSummary numEvents = '0'/> [can clear with ResetEC=] <Power> <vMain> 13.20</vMain> <vLith> 3.16</vLith> </Power> <MemorySummary> <Bytes>0</Bytes> <Samples>0</Samples> [can clear with InitLogging] <SamplesFree>559240</SamplesFree> [can clear with InitLogging] <SampleLength>15</SampleLength> </MemorySummary> <AutonomousSampling>no, stop command</AutonomousSampling> [StartNow or StartLater, Stop]

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Note:

Example: MicroCAT with pressure sensor (user input in bold, command used to modify parameter in parentheses)

Status Commands (continued)

Dates shown are when calibrations were performed.

GetCC Get and display calibration coefficients,

which are initially factory-set and should agree with Calibration Certificates shipped with MicroCAT.

getcc <CalibrationCoefficients DeviceType = 'SBE37SM-RS232' SerialNumber = '03709999'> <Calibration format = 'TEMP1' id = 'Temperature'> <SerialNum>03709999</SerialNum> <CalDate>04-Apr-12</CalDate> [TCalDate=] <A0>6.947802e-05</A0> [TA0=] <A1>2.615233e-04</A1> [TA1=] <A2>-1.265233e-06</A2> [TA2=] <A3>1.310479e-07</A3> [TA3=] </Calibration> <Calibration format = 'WBCOND0' id = 'Conductivity'> <SerialNum>03709999</SerialNum> <CalDate>04-Apr-12</CalDate> [CCalDate=] <G>-1.009121e+00</G> [CG=] <H>1.410162e-01</H> [CH=] <I>-2.093167e-04</I> [CI=] <J>3.637053e-05</J> [CJ=] <PCOR>-9.570000e-08</PCOR> [CTCor=] <TCOR>3.250000e-06</TCOR> [CPCor=] <WBOTC>1.954800e-05</WBOTC> [CWBOTC=] </Calibration> <Calibration format = 'STRAIN0' id = 'Pressure'> <SerialNum>2478619</SerialNum> <CalDate>28-Apr-12</CalDate> [PCalDate=] <PA0>1.729067e+00</PA0> [PA0=] <PA1>1.415754e-01</PA1> [PA1=] <PA2>1.246912e-08</PA2> [PA2=] <PTCA0>2.243971e+00</PTCA0> [PTCA0=] <PTCA1>1.055267e+00</PTCA1> [PTCA1=] <PTCA2>-2.276308e-02</PTCA2> [PTCA2=] <PTCB0>1.003849e+02</PTCB0> [PTCB0=] <PTCB1>1.014510e-02</PTCB1> [PTCB1=] <PTCB2>-2.057110e-04</PTCB2> [PTCB2=] <PTEMPA0>5.669780e+01</PTEMPA0> [PTempA0=] <PTEMPA1>-5.474043e-02</PTEMPA1> [PTempA1=] <PTEMPA2>1.267908e-05</PTEMPA2> [PTempA2=] <POFFSET>0.000000e+00</POFFSET> [POffset= (decibars)] <PRANGE>0.000000e+00</PRANGE> [PRange= (psi)] </Calibration> </CalibrationCoefficients>

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Example: (user input in bold, command used to modify parameter in parentheses)

Status Commands (continued)

GetEC Get and display event counter data, which

can help to identify root cause of a malfunction. Event counter records number of occurrences of common timeouts, power-on resets, etc. Can be cleared with ResetEC. Possible events that may be logged include:

• WDT reset – unexpected reset

• PON reset - power cycled on (each time

power is applied)

• ErrorADC12TimeOut – response delayed

from A/D converter that measures main power and back-up lithium battery power

• ErrorUART0TimeOut – timeout for

transmitter to finish transmitting previous character via RS-232

• ErrorAD7714TimeOut – response delayed

from temperature and pressure A/D converter

• ErrorInvWakeUpFlag – unexpected wakeup

• ErrorFLASHTimeOut – problem with

writing data to FLASH memory

• Alarm long - time to take next sample is too

far in future

• Alarm short - woke up MicroCAT to send a

command while logging, and missed taking a sample

• LoggingRestartNoAlarm – no sample taken

for 8 hours while logging, restart logging

• LoggingRestartPON – power cycled while

logging, logging restarted

getec

<EventCounters DeviceType = 'SBE37SM-RS232' SerialNumber = '03709999'> <EventSummary numEvents = '0'/> [can clear with ResetEC]

</EventCounters>

ResetEC Delete all events in event counter (number

of events displays in GetSD response, and event details display in GetEC response).

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Example: (user input in bold, command used to modify parameter in parentheses)

Status Commands (continued)

GetHD Get and display hardware data, which is

gethd

<HardwareData DeviceType = 'SBE37SM-RS232' SerialNumber = '03709999'> <Manufacturer>Sea-Bird Electronics, Inc.</Manufacturer> <FirmwareVersion>4.1</FirmwareVersion> <FirmwareDate>17 January 2012</FirmwareDate> <CommandSetVersion>1.0</CommandSetVersion> <PCBAssembly>41720A</PCBAssembly> <PCBSerialNum>20736</PCBSerialNum> <PCBAssembly>41660B</PCBAssembly> <PCBSerialNum>22272</PCBSerialNum> <PCBAssembly>41661A</PCBAssembly> <PCBSerialNum>20993</PCBSerialNum> <MfgDate>17 January 2012</MfgDate> <FirmwareLoader>SBE 37-232-V3 FirmwareLoader V 1.0</FirmwareLoader> <InternalSensors> <Sensor id = 'Temperature'> <type>temperature-1</type> <SerialNumber>03709999</SerialNumber> </Sensor> <Sensor id = 'Conductivity'> <type>conductivity-1</type> <SerialNumber>03709999</SerialNumber> </Sensor> <Sensor id = 'Pressure'> <type>strain-0</type> <SerialNumber>2478619</SerialNumber> </Sensor> </InternalSensors> </HardwareData>

fixed data describing MicroCAT:

• Device type, Serial number

• Manufacturer

• Firmware version

• Firmware date

• PCB assembly numbers and serial

numbers

• Manufacture date

• Sensor types and serial numbers

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Example: MicroCAT with a pressure sensor (user input in bold, command used to modify parameter in parentheses).

Note:

Status Commands (continued)

DS Display operating status and setup.

The DS response contains similar information as the combined responses from GetSD and GetCD, but in a different format.

List below includes, where applicable,

command used to modify parameter.

• Firmware version, serial number, date and

time [DateTime=]

• Main battery voltage and back-up lithium

battery voltage

• Number of samples in memory

[SampleNumber=] and available sample space in memory

• Logging status (logging not started,

logging data, not logging, or unknown)

• Sample interval time [SampleInterval=]

• Output format [OutputFormat=]

• Output salinity with each sample

[OutputSal=]? Only displays if set to yes

• Output sound velocity with each sample

[OutputSV=]? Only displays if set to yes

• Transmit autonomous and serial line sync

data real-time [TxRealTime=]?

• Serial sync mode state [SyncMode=]

• Pump installed (always yes for 37-SMP)?

Minimum conductivity frequency for pump turn-on [MinCondFreq=]

• Reference pressure to use in calculations

if no pressure sensor installed (only appears if pressure sensor not installed) [ReferencePressure=]

DS SBE37SM-RS232 4.1 SERIAL NO. 9999 11 Apr 2012 10:55:45 [DateTime=] vMain = 13.21, vLith = 3.08 samplenumber = 77, free = 559163 [SampleNumber=]

not logging, stop command sample interval = 15 seconds [SampleInterval=] data format = converted engineering [OutputFormat=] output salinity [OutputSal=] output sound velocity [OutputSV=] transmit real-time = yes [TxRealTime=] sync mode = no [SyncMode=] pump installed = yes, minimum conductivity frequency = 3000.00 [MinCondFreq=]

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Example: MicroCAT with pressure sensor (user input in bold,

Notes:

Status Commands (continued)

• The DC and GetCC responses contain the same information, but in different formats.

• Dates shown are when calibrations were performed.

DC Display calibration coefficients, which are

initially factory-set and should agree with Calibration Certificates shipped with MicroCAT.

command used to modify parameter in parentheses

DC SBE37SM-RS232 V 4.1 9999 temperature: 08-apr-12 [TCalDate=] TA0 = 6.947802e-05 [TA0=] TA1 = 2.615233e-04 [TA1=] TA2 = -1.265233e-06 [TA2=] TA3 = 1.310479e-07 [TA3=] conductivity: 08-apr-12 [CCalDate=] G = -1.036689e+00 [CG=] H = 1.444342e-01 [CH=] I = -3.112137e-04 [CI=]

J = 3.005941e-05 [CJ=] CPCOR = -9.570001e-08 [CPCor=] CTCOR = 3.250000e-06 [CTCor=] WBOTC = 1.968100e-05 [CWBOTC=] pressure S/N 2478619, range = 2901 psia, 08-apr-12 [PRange= (psi), PCalDate=] PA0 = 0.000000e+00 [PA0=] PA1 = 0.000000e+00 [PA1=] PA2 = 0.000000e+00 [PA2=] PTCA0 = 0.000000e+00 [PTCA0=] PTCA1 = 0.000000e+00 [PTCA1=] PTCA2 = 0.000000e+00 [PTCA2=] PTCB0 = 0.000000e+00 [PTCB0=] PTCB1 = 0.000000e+00 [PTCB1=] PTCB2 = 0.000000e+00 [PTCB2=] PTEMPA0 = 0.000000e+00 [PTempA0=] PTEMPA1 = 0.000000e+00 [PTempA1=] PTEMPA2 = 0.000000e+00 [PTempA2=] POFFSET = 0.000000e+00 [POffset= (decibars)]

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Example: Set current date and time to 10 September 2012 12:00:00 (user input in bold).

Notes:

Example: Set MicroCAT to output Executed and Executing tags (user input in bold).

Note:

Notes:

General Setup Commands

DateTime=mmddyyyyhhmmss Set real-time clock month, day, year, hour,

minute, second.

DATETIME=09102012120000

BaudRate=x x= baud rate (600, 1200, 2400, 4800,

• The MicroCAT baud rate (set with

BaudRate=) must be the same as Seaterm232’s baud rate (set in the Communications menu).

• BaudRate= must be sent twice. After the first entry, the MicroCAT changes to the new baud, and then waits for the command to be sent again at the new baud (In Seaterm232’s Communications menu, select Configure. In the dialog box, select the new baud rate and click OK. Then retype the command.). This prevents you from accidentally changing to a baud that is not supported by your computer. If the MicroCAT does not receive the command again at the new baud, it reverts to the previous baud rate.

OutputExecutedTag=x x=Y: Display XML Executing and

9600, 19200, 38400, 57600, or 115200). Default 9600. Check capability of your computer and terminal program before increasing baud; high baud requires a short cable and good PC serial port with accurate clock. Command must be sent twice to change rate.

Length of cable that MicroCAT can drive is dependent on baud. See Real-Time Data Acquisition.

Executed tags. Executed tag displays at end of each command response; Executing tag displays one or more times if MicroCAT response to command requires additional time.

x=N: Do not.

outputexecutedtag=y

<Executed/>getcd . . . (GetCD response)

(Note: <Executed/> tag at end of command response takes place of S> prompt.)

TxRealTime=x x=Y: Output real-time data while

• The MicroCAT always outputs realtime data for polled sampling.

• TxRealTime does not affect storing data to memory, but slightly increases current consumption and time needed to sample (and then transmit) data.

• To capture real-time data to a file, do the following before starting logging:

1. Click the Capture menu in

Seaterm232.

2. Enter the desired file name in the

dialog box. The capture status displays in the status bar at the bottom of the screen.

x=N: Do not output real-time data.

ReferencePressure=x x = reference pressure (gauge) in decibars.

The MicroCAT automatically enters quiescent state after 2 minutes without receiving a command. This timeout algorithm is designed to conserve battery energy if the user does not send QS to put the MicroCAT to sleep.

QS Quit session and place MicroCAT in

sampling autonomously or in serial line sync mode. Data is transmitted immediately after it is sampled. For autonomous sampling, do not set SampleInterval < 10 seconds if transmitting real-time data (see

Sample Timing in Section 2: Description of MicroCAT).

MicroCAT without installed pressure sensor uses this reference pressure in conductivity (and optional salinity and sound velocity) calculations. Entry ignored if MicroCAT includes pressure sensor.

quiescent (sleep) state. Main power is turned off. Data logging and memory retention are not affected.

CAUTION:

MinCondFreq=.

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Pump Setup Commands

The SBE 37-SMP MicroCAT has an integral pump that is water lubricated; running it dry for an extended period of time will damage it. To prevent the pump from running dry while sampling in autonomous or serial line sync mode, the MicroCAT checks the raw conductivity frequency (Hz) from the last sample against the user-input minimum conductivity frequency (MinCondFreq=). If the raw conductivity frequency is greater than MinCondFreq, it runs the pump for 1.0 second before taking the sample; otherwise it does not run the pump.

If the minimum conductivity frequency is too close to the zero conductivity frequency (from the MicroCAT Calibration Sheet), the pump may turn on when the MicroCAT is in air, as a result of small drifts in the electronics. Some experimentation may be required to control the pump, particularly in fresh water applications.

MinCondFreq=x x= minimum conductivity frequency (Hz) to

enable pump turn-on for autonomous or serial

The MicroCAT alwa ys runs the pump in response to a polled sampling command (TS, TSH, etc.), regardless of the conductivity frequency from the last sample and the setting for

line sync mode sampling, to prevent pump from running before MicroCAT is in water. Pump does not run when conductivity frequency drops below MinCondFreq=. MicroCAT Configuration Sheet lists uncorrected (raw) frequency output at 0 conductivity.

Typical value (and factory-set default) for MinCondFreq= for salt water and estuarine applications is: (zero conductivity frequency + 500 Hz).

Typical value for MinCondFreq= for fresh water applications is: (zero conductivity frequency + 5 Hz).

PumpOn Turn pump on for testing purposes. Used to

Do not run the pump dry. The pump is water lubricated; running it without water will damage it. If briefly testing your system with the PumpOn command in dry conditions, orient the MicroCAT to provide an upright U-shape for the plumbing. Then fill the inside of the pump head with water via the pump exhaust tubing. This will provide enough lubrication to prevent pump damage during brief testing.

test pump or to run it to remove sediment from inside conductivity cell. Pump runs continuously during test, drawing current. Send PumpOff to stop test. Note that:

1. MicroCAT does not check minimum conductivity frequency when user sends PumpOn.

2. PumpOn has no effect on pump operation while sampling.

PumpOff Turn pump off if it was turned on with

PumpOn. Note that PumpOff has no effect on

pump operation while sampling.

Notes:

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Memory Setup Commands

• If the FLASH memory is filled to capacity, sampling continues, but excess data is not saved in memory (i.e., the MicroCAT does not overwrite the data in memory).

• The MicroCAT requires verification when InitLogging or SampleNumber= are sent. The MicroCAT responds with a request to repeat the command to confirm. Type the command again and press the Enter key to proceed.

• Do not send InitLogging or SampleNumber=0 until all data has been uploaded. These

commands do not delete the data; they just reset the data pointer. If

you accidentally send one of these commands before uploading, recover the data as

follows:

1. Set SampleNumber=x, where x is

your estimate of number of samples in memory.

2. Upload data. If x is more than actual

number of samples in memory, data for non-existent samples will be bad, random data. Review uploaded data file carefully and delete any bad data.

3. If desired, increase x and upload data

again, to see if there is additional valid data in memory.

InitLogging Initialize logging – after all previous data

has been uploaded, initialize logging before starting to sample again to make entire memory available for recording. InitLogging sets sample number (SampleNumber=) to 0 (sampling will start with sample 1). If not set to 0, data will be stored after last recorded sample.

Do not send InitLogging until all existing data has been uploaded.

SampleNumber=x x= sample number for last sample in

memory. SampleNumber=0 is equivalent to InitLogging. Do not send

SampleNumber=0 until all existing data has been uploaded.

Output Format Setup Commands

OutputFormat=x x=0: output raw decimal data.

• See Data Formats after the command descriptions for complete details.

• The MicroCAT does not store salinity and sound velocity in memory if OutputSal=Y and OutputSV=Y. It calculates and outputs the values real-time or as data is uploaded; therefore, outputting these parameters has no effect on the number of samples that can be stored in memory.

• Salinity and sound velocity can also be calculated in SBE Data Processing, from data uploaded from the MicroCAT’s memory.

x=1 (default): output converted decimal

data.

x=2: output converted decimal data in XML.

x=3: output converted decimal data, alternate format.

OutputSal=x x=Y: Calculate and output salinity (psu)

with each sample. Only applies if OutputFormat=1, 2, or 3.

x=N: Do not.

OutputSV=x x=Y: Calculate and output sound velocity

(m/sec) with each sample, using Chen and Millero formula (UNESCO Technical Papers in Marine Science #44). Only applies if OutputFormat=1, 2, or 3.

x=N: Do not.

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Note:

(TxRealTime=Y).

Notes:

Example: Program MicroCAT to start logging on 20 September 2012 12:00:00

Autonomous Sampling (Logging) Commands

Logging commands direct the MicroCAT to sample data at pre-programmed intervals and store the data in its FLASH memory. Pump operation is dependent on the setting for MinCondFreq=.

• Do not set SampleInterval= to less than 10 seconds if transmitting realtime data (TxRealTime=Y).

• If the MicroCAT is logging data and the battery voltage is less than

7.1 volts for five consecutive scans, the MicroCAT halts logging.

• If the FLASH memory is filled to capacity, sampling continues, but excess data is not saved in memory (i.e., the MicroCAT does not overwrite the data in memory).

SampleInterval=x x= interval (seconds) between samples

(6 – 21,600). When commanded to start sampling with StartNow or StartLater, at x second intervals MicroCAT takes measurement (running pump for

1.0 second before each measurement), stores data in FLASH memory, transmits real-time data (if TxRealTime=Y), and goes to sleep.

StartNow Start logging now, at rate defined by

SampleInterval=. Data is stored in

FLASH memory. Data is transmitted realtime if TxRealTime=Y.

Notes:

• After receiving StartLater, the MicroCAT displays not logging: waiting to start in reply to DS. Once logging has started, the reply displays logging.

• If the delayed start date and time has already passed when StartLater is received, the MicroCAT executes StartNow.

• If the delayed start date and time is more than 30 days in the future when StartLater is received, the MicroCAT assumes that the user made an error in setting the delayed start date and time, and it executes StartNow.

StartDateTime=mmddyyyyhhmmss

Set delayed logging start month, day, year, hour, minute, second.

StartLater Start logging at time set with delayed start

date and time command, at rate defined by SampleInterval. Data is stored in FLASH memory. Data is transmitted real-time if TxRealTime=Y. If you need to change MicroCAT setup after StartLater has been sent (but before logging has started), send Stop, change setup as desired, and then send StartLater again.

(user input in bold).

STARTDATETIME=09202012120000 STARTLATER

Stop Stop logging (started with StartNow or

You may need to send Stop several times to get the MicroCAT to respond. This is most likely to occur if sampling with a small SampleInterval and transmitting real-time data

StartLater) or stop waiting to start logging (if StartLater was sent but logging has not begun yet). Press any key before entering Stop. Stop must be sent before uploading data from memory.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Note:

CAUTION:

Polled Sampling Commands

The MicroCAT alwa ys runs the pump in response to polled sampling commands (TS, TSH, etc.), regardless of the conductivity frequency from the last sample and the setting for

MinCondFreq=. Do not run the pump dry. The pump

These commands are used to request 1 or more samples from the MicroCAT. Unless noted otherwise, the MicroCAT does not store the data in FLASH memory.

TS Run pump for 1.0 second, take sample,

store data in buffer, output data.

TSH Run pump for 1.0 second, take sample,

store data in buffer (do not output data).

TSS Run pump for 1.0 second, take sample,

store data in buffer and in FLASH memory, and output data. Note: MicroCAT ignores this command if sampling data (StartNow or StartLater has been sent).

TSN:x Run pump continuously while taking

The MicroCAT has a buffer that stores the most recent data sample. Unlike data in the FLASH memory, data in the buffer is erased upon removal or failure of power.

x samples and outputting data. To interrupt this sampling, press Esc key. Note: MicroCAT ignores this command if sampling data (StartNow or StartLater has been sent).

SL Output last sample stored in buffer.

SLT Output last sample stored in buffer. Then

run pump for 1.0 second, take new sample, and store data in buffer (do not output data from new sample).

Serial Line Sync Commands

SyncMode=x x=Y: Enable serial line sync. When a

simple pulse (a single character) is

To disable serial line sync mode, select Send 5 second break in Seaterm232’s Command menu. See Sampling Modes above for complete details on the operation of serial line synchronization.

transmitted, MicroCAT runs pump for 1.0 second, takes a sample, stores data in FLASH memory, and goes to sleep. Data is transmitted real-time if TxRealTime=Y. Pump operation is dependent on setting for MinCondFreq=.

x=N: Disable serial line synchronization.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Example: Upload samples 1 to 200 to a file (user input in bold).

Notes:

Data Upload Commands

Stop sampling (send Stop) before uploading data.

• Use Seaterm232’s Upload menu to upload data that will be processed by SBE Data Processing. Manually entering a

data upload command does not produce data with the required header information for processing by our software. These commands are included here for reference for users who are writing their own software.

• If not using the Upload menu - To save data to a file, click Capture before entering a data upload command.

• See Data Formats.

GetSamples:b,e Upload data from scan b to scan e,

in format defined by OutputFormat=. First sample is number 1. As data is uploaded, screen first displays

start time = start sample number =

These are start time and starting sample number for last set of logged data; can be useful in determining what data to review.

DDb,e Upload data from scan b to scan e,

in alternate converted decimal form (OutputFormat=3) (regardless of OutputFormat=). First sample is number 1. As data is uploaded, screen first displays

start time =, start sample number = .

These are start time and starting sample number for last set of logged data; can be useful in determining what data to review.

(Click Capture menu and enter desired filename in dialog box)

GETSAMPLES:1,200

DD1,200

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Note:

Calibration Coefficients Commands

Calibration coefficients are initially factory-set and should agree with Calibration Certificates shipped with the MicroCAT

Temperature

F = floating point number S = string with no spaces

TCalDate=S TA0=F TA1=F TA2=F TA3=F

S=Temperature calibration date F=Temperature A0 F=Temperature A1 F=Temperature A2 F=Temperature A3

Conductivity

CCalDate=S CG=F CH=F CI=F CJ=F WBOTC=F CTCor=F CPCor=F

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

Pressure

PCalDate=S PA0=F PA1=F PA2=F PTCA0=F PTCA1=F PTCA2=F PTCB0=F PTCB1=F PTCB2=F PTempA0=F PTempA1=F PTempA2=F POffset=F

S=Pressure calibration date F=Pressure A0 F=Pressure A1 F=Pressure A2 F=Pressure ptca0 F=Pressure ptca1 F=Pressure ptca2 F=Pressure ptcb0 F=Pressure ptcb1 F=Pressure ptcb2 F=Pressure temperature a0 F=Pressure temperature a1 F=Pressure temperature a2 F=Pressure offset (decibars)

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Example: Sample data output when pressure sensor is installed, OutputFormat=0, Example: Sample data output when pressure sensor is installed, OutputFormat=1, OutputSal=Y, OutputSV=Y:

Notes:

Data Formats

• Time is the time at the start of the sample.

• When TxRealTime=Y, real-time autonomous data and real-time serial line sync data transmitted to the computer is preceded by a # sign.

• The MicroCAT’s pressure sensor is 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

Each scan ends with a carriage return <CR> and line feed <LF>.

• OutputFormat=0: raw decimal data, intended for diagnostic use

at Sea-Bird tttttt, cccc.ccc, pppppp, vvvv, dd mmm yyyy, hh:mm:ss

where

tttttt = temperature A/D counts. cccc.ccc = conductivity frequency (Hz). pppppp = pressure sensor pressure A/D counts; sent only if optional pressure sensor installed. vvvv = pressure sensor pressure temperature compensation A/D counts; sent only if optional pressure sensor installed. dd mmm yyyy = day, month, year. hh:mm:ss = hour, minute, second. Note that salinity and sound velocity are not sent, regardless of the setting for those parameters. All data is separated with a comma and a space.

OutputSal=Y, and OutputSV=Y:

524276, 2886.656, 785053, 2706, 20 Aug 2012, 09:01:34

(temperature, conductivity, pressure sensor pressure, pressure sensor temperature compensation, date, time)

• OutputFormat=1 (default): converted decimal data

tttt.tttt,ccc.ccccc,ppppp.ppp,ssss.ssss,vvvvv.vvv, dd mmm yyyy, hh:mm:ss

where

tttt.tttt = temperature (°C, ITS-90). ccc.ccccc = conductivity (S/m). ppppp.ppp = pressure (decibars); sent only if optional pressure sensor installed. ssss.ssss= salinity (psu); sent only if OutputSal=Y. vvvvv.vvv = sound velocity (meters/second); sent only if OutputSV=Y. dd mmm yyyy = day, month, year. hh:mm:ss = hour, minute, second.

Leading zeros are suppressed, except for one zero to the left of the decimal point. All data is separated with a comma; date and time are also preceded by a space.

8.5796, 0.15269, 531.316, 1.1348, 1451.478, 20 Aug 2012, 09:01:44

(temperature, conductivity, pressure, salinity, sound velocity, date, time)

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Example: Sample data output when pressure sensor is installed, OutputFormat=2, OutputSal=Y, OutputSV=Y:

Note:

Example: Sample data output when pressure sensor is installed, OutputFormat=3, OutputSal=Y, OutputSV=Y:

Note:

• OutputFormat=2: converted decimal data in XML

<?xml version=”1.0”?> <datapacket>

For ease in reading, the data structure is shown with each XML tag on a separate line. However, there are no carriage returns or line feeds between tags (see example below).

<hdr> <mfg>Sea-Bird</mfg> <model>37sm</model> <sn>nnnnnnnn</sn> </hdr> <data> <t1>ttt.tttt</t1> <c1>cc.ccccc</c1> <p1>pppp.ppp </p1> <sal>sss.ssss</sal> <sv>vvvv.vvv</sv> <dt>yyyy-mm-ddThh:mm:ss</dt> </data> </datapacket>

where

nnnnnnnn = MicroCAT serial number.

ttt.tttt = temperature (°C, ITS-90). cc.ccccc = conductivity (S/m). pppp.ppp = pressure (decibars); sent only if optional pressure sensor installed. sss.ssss= salinity (psu); sent only if OutputSal=Y. vvvv.vvv = sound velocity (meters/second); sent only if OutputSV=Y.

yyyy-mm-ddThh:mm:ss = year, month, day, hour, minute, second.

Leading zeros are suppressed, except for one zero to the left of the decimal point.

<?xml version="1.0"?><datapacket><hdr><mfg>Sea-Bird</mfg><model>37SM</model> <sn>03709999</sn></hdr><data><t1> 8.5796</t1><c1> 0.15269</c1><p1> 531.316</p1> <sal> 1.1348</sal><sv>1451.478</sv><dt>2012-08-20T09:01:44</dt></data></datapacket>

CRLF (temperature, conductivity, pressure, salinity, sound velocity, date and time)

• OutputFormat=3: converted decimal data, alternate

ttt.tttt,cc.ccccc, pppp.ppp, sss.ssss, vvvv.vvv, dd mmm yyyy, hh:mm:ss

This format is identical to the format from an SBE 37-SMP with firmware < 3.0 and Format=1. It is provided for compatibility with systems programmed for those older instruments.

where

Leading zeros are suppressed, except for one zero to the left of the decimal point. There is a comma but no space between temperature and conductivity. All other data is separated with a comma and a space.

8.5796, 0.15269, 531.316, 1.1348, 1451.478, 20 Aug 2012, 09:01:44

(temperature, conductivity, pressure, salinity, sound velocity, date, time)

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Note:

Shown with conductivity

Intake

Exhaust

Section A-A

10 degree

Optimizing Data Quality / Deployment Orientation

A pump clogged with sediment results in poor flushing, causing poor quality data.

cell guard removed

Looking down on duct

Bleed hole in duct

minimum

Background Information

Sea-Bird’s general recommendation is to deploy the MicroCAT with the plumbing in an inverted U-shape, to minimize the ingestion of sediment. A small bleed hole in the duct provides a way for air to exit the plumbing, so that the pump will prime and operate. In considering the effect of air on the pump, it can be instructive to look at the amount of air in the water column:

• Case 1: The top ~2 meters of the water column may contain a continuous

supply of bubbles injected into the system by breaking waves. In this area, the ability to continuously eliminate air from the system, throughout the deployment, is of prime concern.

• Case 2: The next ~30 meters of the water column is not typically affected

by bubbles from breaking waves. Without a bleed hole, it could take a few days to weeks after deployment for the air to clear out of the system in an inverted U-shape. However, once the air was bled, no more air would be injected into the plumbing.

• Case 3: Below ~30 meters, without a bleed hole, it could take only a few

hours to a day for the air to clear out of the system in an inverted U-shape. As in Case 2, once the air was bled, no more air would be injected into the plumbing.

The bleed hole, while providing a way for air to exit the plumbing, also provides a little more ventilation; this ventilation will cause a slight decrease in the concentration of anti-foulant in the water held in the plumbing between samples. In our judgment, and the experience of customers, the risk of poor data due to sediment accumulation is usually greater than the risk of slightly reduced effectiveness of the anti-foulant, or is at least a reasonable trade-off.

Deployment Recommendations

• Most deployments – Deploy the MicroCAT with the plumbing in an

inverted U-shape (as shown in the photos), allowing air to exit the

plumbing through the bleed hole.

• Deployments where severe bio-fouling is the main concern and

sediment is not an issue –

Case A: You need accurate data immediately upon deployment - Plug the bleed hole. Deploy the MicroCAT with the plumbing in an upright U-shape, providing maximum bio-foul protection but leaving the MicroCAT vulnerable to ingestion of sediment. Case B: You can skip some initial data, allowing time for trapped air to dissolve into the water and the pump to prime properly – Plug the bleed hole. Deploy the MicroCAT with the plumbing in an inverted U-shape, providing maximum bio-foul protection as well as protection from the ingestion of sediment. This deployment method will provide good data within a day if the deployment is deeper than ~30 meters. Eliminate scans associated with the initial deployment by evaluating the conductivity data; minimal changes in conductivity are an indication that pump flow is not correct because air in the plumbing has prevented the pump from priming.

• Deployments where air bubbles are the main concern and sediment is

not an issue - Plug the bleed hole. Deploy the MicroCAT with the

plumbing in an upright U-shape. This orientation provides better bleeding of air from the plumbing than can be achieved with the small bleed hole, but leaves the MicroCAT vulnerable to ingestion of sediment.

• Deployments where (for mounting reasons) the preferred orientation

is horizontal – Sea-Bird does not recommend horizontal mounting,

because sediment can accumulate in the conductivity cell, resulting in very poor quality conductivity data. As a minimum, incline the

MicroCAT 10 degrees above the horizontal, with the inlet and exhaust pointing down, to prevent sediment accumulation and provide

proper pump operation.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Setup for Deployment

1. Install new batteries (see Section 5: Routine Maintenance and

Calibration) or ensure the existing battery pack has enough capacity to

cover the intended deployment.

2. Program the MicroCAT for the intended deployment (see Section 3:

Preparing MicroCAT for Deployment for connection information; see information in this section on commands and sampling modes):

A. Ensure all data has been uploaded, and then send InitLogging to

make the entire memory available for recording. If InitLogging is not sent, data will be stored after the last recorded sample.

B. Set the date and time (DateTime=).

C. Establish the setup and logging parameters.

D. Use one of the following command sequences to initiate logging:

• StartNow to start logging now, taking a sample every

SampleInterval= seconds.

• StartDateTime= and StartLater to start logging at the specified

date and time, taking a sample every SampleInterval= seconds.

• SyncMode=Y to place the MicroCAT in serial line sync mode,

so that a simple pulse on the RS-232 line will initiate a sample.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

CAUTION:

Locking sleeve

I/O cable

Standard mounting

For most

Deployment

The MicroCAT comes standard with a pre-installed Sea-Bird wire mounting clamp and guide.

1. New MicroCATs are shipped with AF24173 Anti-Foulant Devices and a

yellow protective label pre-installed. A. Remove the protective label, if installed, from the intake and exhaust.

The label must be removed prior to deployment or pressurization. If the label is left in place, the flow will be impeded,

the sensor will not operate properly, and you may cause severe damage to the conductivity cell.

B. Verify that the Anti-Foulant Devices are installed (see Replacing

Anti-Foulant Devices – Mechanical Design Change in Section 5: Routine Maintenance and Calibration).

2. Install the dummy plug or I/O cable (for external power and/or serial

communication during deployment): A. Lightly lubricate the inside of the dummy plug or cable connector

Do not use WD-40 or other petroleum-based lubricants, as they will damage the connectors.

connector

applications, deploy in orientation shown (connector at bottom)

clamp and guide – loosen hardware to separate clamp/guide halves and mount on mooring cable

3. Attach the mounting clamp and guide to the mooring cable.

4. Verify that the hardware and external fittings are secure.

5. Deploy the MicroCAT.

with silicone grease (DC-4 or equivalent).

B. Standard Connector (shown in photos) - Install the dummy plug or

cable connector, aligning the raised bump on the side of the plug/connector with the large pin (pin 1 - ground) on the MicroCAT. Remove any trapped air by burping or gently squeezing the plug/connector near the top and moving your fingers toward the end cap. OR MCBH Connector – Install the plug/cable connector, aligning the pins.

C. Place the locking sleeve over the plug/connector. Tighten the locking

sleeve finger tight only. Do not overtighten the locking sleeve and do not use a wrench or pliers.

See Optimizing Data Quality / Deployment Orientation for deployment recommendations.

WARNING!

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Recovery

If the MicroCAT stops working while underwater, is unresponsive to commands, or shows other signs of flooding or damage, carefully secure it away from people until you have determined that abnormal internal pressure does not exist or has been relieved. Pressure housings

may flood under pressure due to dirty or damaged o-rings, or other failed seals. When a sealed pressure housing floods at great depths and is subsequently raised to the surface, water may be trapped at the pressure at which it entered the housing, presenting a danger if the housing is opened before relieving the internal pressure. Instances of such flooding are rare. However, a housing that floods at 5000 meters depth holds an internal pressure of more than 7000 psia, and has the potential to eject the end cap with lethal force. A housing that floods at 50 meters holds an internal pressure of more than 85 psia; this force could still cause injury. If you suspect the MicroCAT is flooded, point it in a safe direction away from people, and loosen the bulkhead connector very slowly, at least 1 turn. This opens an o-ring seal under the connector. Look for signs of internal pressure (hissing or water leak). If internal pressure is detected, let it bleed off slowly past the connector o-ring. Then, you can safely remove the end cap.

1. Rinse the conductivity cell with fresh water. (See Section 5: Routine

Maintenance and Calibration for cell cleaning and storage.)

2. Install a yellow protective label over the intake and exhaust (1 extra label

is included in the spares kit that ships with the MicroCAT).

3. If the batteries are exhausted, new batteries must be installed before the

data can be extracted. Stored data will not be lost as a result of exhaustion or removal of batteries. See Section 5: Routine Maintenance and Calibration for replacement of batteries.

4. If immediate redeployment is not required, you can leave the MicroCAT

with batteries in place and in a quiescent state (QS). The quiescent current required is only 30 microAmps (less than 5% loss per year).

Note:

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Uploading and Processing Data

1. Double click on SeatermV2.exe. The main screen appears.

Data may be uploaded during deployment or after recovery. If uploading after recovery, connect the I/O cable as described in Power and

Communications Test in Section 3: Preparing MicroCAT for Deployment.

You may need to send Stop several times to get the MicroCAT to respond.

SBE37SM-RS232 4.1 SERIAL NO. 9999 24 Apr 2012 09:48:50 vMain = 13.21, vLith = 3.08 samplenumber = 6, free = 559234 not logging, stop command sample interval = 15 seconds data format = converted engineering transmit real-time = yes sync mode = no pump installed = yes, minimum conductivity frequency = 3000.0

BaudRate= must be sent twice. After the first entry, the MicroCAT changes to the new baud, and then waits for the command to be sent again at the new baud (In Seaterm232’s Communications menu, select Configure. In the dialog box, select the new baud rate and click OK. Then retype the command.). If it does not receive the command again at the new baud, it reverts to the previous baud rate.

2. In the Instruments menu, select SBE 37 RS232. Seaterm232 opens.

3. Seaterm232 tries to automatically connect to the MicroCAT. As it

connects, it sends GetHD and displays the response. Seaterm232 also fills the Send Commands window with the correct list of commands for your MicroCAT. If there is no communication:

A. In the Communications menu, select Configure. The Serial Port

Configuration dialog box appears. Select the Comm port and baud rate for communication, and click OK. Note that the factory-set baud rate is documented on the Configuration Sheet.

B. In the Communications menu, select Connect (if Connect is grayed

out, select Disconnect and reconnect). Seaterm232 will attempt to connect at the baud specified in Step A, but if unsuccessful will then cycle through all other available baud rates.

C. If there is still no communication, check cabling between the

computer and MicroCAT.

D. If there is still no communication, repeat Step A with a different

comm port, and try to connect again.

4. If sampling autonomously, command the MicroCAT to stop logging by

pressing any key, typing Stop, and pressing the Enter key.

5. Display MicroCAT status information by typing DS and pressing the

Enter key. The display looks like this:

Verify that the status is not logging.

6. If desired, increase the MicroCAT’s baud rate for data upload.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Note:

C:\UploadTest.xml

Bytes 90

Defines data upload type and range:

file, and have same name (but different extensions).

Select number of bytes uploaded in each block.

Select to enable ASCII text or

7. Click the Upload menu to upload stored data. Seaterm232 responds as

follows: A. Seaterm232 sends GetHD and displays the response, verifying that it

is communicating with the 37-SMP.

B. Seaterm232 sends OutputExecutedTag=Y; this setting is required

for the upload.

C. Seaterm232 sends GetSD and displays the response, providing

information on the number of samples in memory.

D. In the Save As dialog box, enter the desired upload file name and

click Save. The upload file has a .XML extension

E. An Upload Data dialog box appears:

If binary upload is selected, Seaterm232 uploads the data in binary and then converts it to ASCII text, resulting in a data file that is identical to one uploaded in ASCII text.

Seaterm232 uploads data in blocks, and calculates a checksum at end of each block. If block fails checksum verification, Seaterm232 tries to upload block of data again, cutting block size in half.

binary upload. Binary is approximately twice as fast.

Samples 6 SamplesFree 559234 SampleLength 15

• All data as a single file – All data is uploaded into 1 file.

• By scan number range – Enter beginning scan (sample) number and total number of scans. All data within range is uploaded into 1 file.

To change upload file name selected in Step D above, click Browse to navigate to desired upload file path and name. Upload file has a .xml extension. After Seaterm232 uploads data into .xml data file, it creates .hex data file and .xmlcon configuration file that are compatible with SBE Data Processing. These files are placed in same directory as .xml data

Make the desired selections.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Note:

Defines header information

8. Click the Header Form tab to customize the header:

included with uploaded data:

• Prompt for header information – As data is uploaded, user is prompted to fill out user-defined header form.

• Include default header form in upload file – User-defined default header form included in upload file. User is not prompted to add any information when data is uploaded.

• Don’t include default header form in upload file – Header information not included in upload file.

SeatermV2 with version < 1.1 did not convert the uploaded .xml data file to a .hex and .xmlcon file. Convert .XML data file in the Tools menu was used to convert the .xml data file to a .cnv file, which could be processed in SBE Data Processing. We recommend that you update your SeatermV2 software to 1.1b or later.

The entries are free form, 0 to 12 lines long. This dialog box establishes:

• the header prompts that appear for the user to fill in when uploading

data, if Prompt for header information was selected

• the header included with the uploaded data, if Include default header

form in upload file was selected

Enter the desired header/header prompts.

9. Click Upload; the Status bar at the bottom of the window displays the

upload progress: A. Seaterm232 sends several status commands providing information

regarding the number of samples in memory, calibration coefficients, etc., and writes the responses to the upload .xml file.

B. If you selected Prompt for header information in the Upload Data

dialog box – a dialog box with the header form appears. Enter the desired header information, and click OK. Seaterm232 writes the header information to the upload .xml file.

C. Seaterm232 sends the data upload command, based on your selection

of upload range in the Upload Data dialog box, and writes the data to the upload .xml file.

D. From the information in the .xml file, Seaterm232 creates a .hex data

file and .xmlcon configuration file that are compatible with SBE Data Processing for processing and plotting the data. These files are placed in the same directory as the .xml data file and have the same name (but different extensions).

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Notes:

Location to store all setup

• Ensure all data has been uploaded from the MicroCAT by reviewing the data in SBE Data Processing.

• If you do not run Data Conversion now, you can run it later by opening SBE Data Processing.

• See the SBE Data Processing manual and/or Help for details.

10. After the data has been uploaded, Seaterm232 prompts you to run SBE

Data Processing’s Data Conversion module if desired. Data Conversion converts the .hex (raw data) file to a .cnv file, which can then be processed by other modules in SBE Data Processing.

A. If you click Yes, Seaterm232 opens SBE Data Processing’s Data

Conversion module, and fills in the appropriate instrument configuration (.xmlcon) file and data (.hex) file on the File Setup tab.

information. Default is directory with SeatermV2 application data, when Data Conversion is launched from Seaterm232.

Instrument configuration (.xmlcon) file location, which is created by Seaterm232, and contains MicroCAT’s calibration coefficients

Directory and file name for raw data (.hex) file created by Seaterm232 from uploaded data.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

GetCD

Latitude is used to calculate local gravity (to

Indicates whether MicroCAT includes dissolved

Double click on sensor to view and/or modify

The Configuration dialog box (which appears if you click Modify on the File Setup tab) looks like this:

Indicates if MicroCAT includes optional pressure sensor. If no pressure sensor included, deployment pressure is used to calculate conductivity (and derived variables such as salinity and sound velocity). Value shown is based on ReferencePressure= that was programmed into MicroCAT; you can

change this value in .xmlcon file, if you have updated deployment depth information.

oxygen sensor (IDO or ODO MicroCATs only).

calculate salt water depth). If enabled, software uses input latitude in calculation. If disabled, software uses Latitude on Miscellaneous tab of Data Conversion. Enter latitude for your deployment.

calibration coefficients, which are based on calibration coefficients that were programmed into MicroCAT.

Time between scans. Must agree with MicroCAT setup (SampleInterval=); see reply from

or DS.

The settings in the .xmlcon file created by Seaterm232 are based on the setup of the MicroCAT.

• Review the deployment latitude, and modify as needed.

• If your MicroCAT does not have a pressure sensor, review the

deployment pressure, and modify as needed.

Click Save if you made any changes, and then click Exit.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Select start time source for

If desired, select to have software prompt you to

Select:

MicroCAT)

If you plan to do further data processing,

B. Click on the Data Setup tab.

Select ASCII output.

- Upcast and downcast

- Create converted data (.cnv) file only (only appropriate selections for

Select which variables to convert and output (see dialog box below).

header: Instrument’s time stamp (only appropriate selection for MicroCAT).

only output Conductivity, Temperature, Pressure. After processing is complete, compute salinity, density, etc. in the Derive module. See the SBE Data Processing manual and/or Help for details.

modify start time to put in output .cnv header (instead of using source for start time listed above), or to add a note to output .cnv header.

The Select Output Variables dialog box (which appears when you click Select Output Variables on the Data Setup tab) looks like this:

Select Temperature, Conductivity, and Pressure (optional), as well as desired derived variables such as salinity, sound velocity, etc. Click OK.

C. At the bottom of the Data Conversion dialog box, click Start Process

to convert the .hex file to a .cnv file.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Notes:

To prepare for re-deployment:

1. After all data has been uploaded, send InitLogging. If this is not sent, new data will be stored after the last sample, preventing use of the entire memory.

2. Do one of the following:

• Send QS to put the MicroCAT in

quiescent (sleep) state until ready to redeploy. Quiescent current is only 30 microAmps, so the batteries can be left in place without significant loss of capacity.

• Use StartNow to begin logging

immediately.

• Set a date and time for logging to

start using StartDateTime= and StartLater.

11. Once the data is converted to a .cnv file, use the other SBE Data

Processing modules as desired:

• Derive module - Calculate additional derived variables.

• Sea Plot module - Plot data.

Manual revision 019 Section 4: Deploying and Operating MicroCAT SBE 37-SMP RS-232

Note:

Editing Raw Data File

Sometimes users want to edit the raw .hex data file before beginning processing, to remove data at the beginning of the file corresponding to instrument soak time, remove blocks of bad data, edit the header, or add explanatory notes.

Editing the raw .hex file can corrupt the data, making it impossible to perform further processing using Sea-Bird software. Sea-Bird strongly

recommends that you first convert the data to a .cnv file (using the Data Conversion module in SBE Data Processing), and then use other SBE Data Processing modules to edit the .cnv file as desired.

The procedure described below for editing a .hex data file has been found to work correctly on computers running Windows 98, 2000, and NT. If the

Although we provide this technique for editing a raw .hex file, Sea-Bird’s

strong recommendation, as described above, is to always convert the raw data file and then edit the converted file.

editing is not performed using this technique, SBE Data Processing may reject the edited data file and give you an error message.

1. Make a back-up copy of your .hex data file before you begin.

2. Run WordPad. In the File menu, select Open. The Open dialog box

appears. For Files of type, select All Documents (*.*). Browse to the desired .hex file and click Open.

3. Edit the file as desired, inserting any new header lines after the System

Upload Time line. Note that all header lines must begin with an asterisk (*), and *END* indicates the end of the header. An example is shown below (for an SBE 21), with the added lines in bold:

* Sea-Bird SBE 21 Data File: * FileName = C:\Odis\SAT2-ODIS\oct14-19\oc15_99.hex * Software Version Seasave Win32 v1.10 * Temperature SN = 2366 * Conductivity SN = 2366 * System UpLoad Time = Oct 15 1999 10:57:19

* Testing adding header lines * Must start with an asterisk * Place anywhere between System Upload Time & END of header

* NMEA Latitude = 30 59.70 N * NMEA Longitude = 081 37.93 W * NMEA UTC (Time) = Oct 15 1999 10:57:19 * Store Lat/Lon Data = Append to Every Scan and Append to .NAV File When <Ctrl F7> is Pressed ** Ship: Sea-Bird ** Cruise: Sea-Bird Header Test ** Station: ** Latitude: ** Longitude: *END*

4. In the File menu, select Save (not Save As). If you are running

Windows 2000, the following message displays:

You are about to save the document in a Text-Only format, which will remove all formatting. Are you sure you want to do this?

Ignore the message and click Yes.

5. In the File menu, select Exit.

Manual revision 019 Section 5: Routine Maintenance and Calibration SBE 37-SMP RS-232

CAUTION: Note:

Locking sleeve I/O cable

Section 5: Routine Maintenance and Calibration

This section reviews corrosion precautions, connector mating and maintenance, conductivity cell cleaning and storage, plumbing maintenance, plastic housing handling instructions, replacement of batteries, pressure sensor maintenance, replacement of AF24173 Anti-Foulant Devices, and sensor calibration. The accuracy of the MicroCAT is sustained by the care and calibration of the sensors and by establishing proper handling practices.

Corrosion Precautions

Rinse the MicroCAT with fresh water after use and prior to storage.

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.

Connector Mating and Maintenance

See Application Note 57: Connector Care and Cable Installation.

Do not use WD-40 or other petroleum-based lubricants, as they will damage the connectors.

Clean and inspect the connectors, cable, and dummy plug before every deployment and as part of your yearly equipment maintenance. Inspect connectors that are unmated for signs of corrosion product around the pins, and for cuts, nicks or other flaws that may compromise the seal.

When remating:

1. Lightly lubricate the inside of the dummy plug/cable connector with

silicone grease (DC-4 or equivalent).

2. Standard Connector - Install the plug/cable connector, aligning the

raised bump on the side of the plug/cable connector with the large pin (pin 1 - ground) on the MicroCAT. Remove any trapped air by burping or gently squeezing the plug/connector near the top and moving your fingers toward the end cap. OR MCBH Connector – Install the plug/cable connector, aligning the pins.

3. Place the locking sleeve over the plug/cable connector. Tighten the

locking sleeve finger tight only. Do not overtighten the locking sleeve and do not use a wrench or pliers.

Verify that a cable or dummy plug is installed on the MicroCAT before deployment.

Manual revision 019 Section 5: Routine Maintenance and Calibration SBE 37-SMP RS-232

CAUTIONS:

water.

Section A-A

Exhaust

Intake

Conductivity Cell Maintenance

• Do not put a brush or any object

inside the plumbing to clean it.

Touching and bending the conductivity cell electrodes can change the calibration. Large bends and movement of the electrodes can damage the cell.

• Do not store with water in the

plumbing.

(for example, in Arctic environments or during air shipment) can break the conductivity cell if it is full of

Freezing temperatures

The MicroCAT’s conductivity cell and plumbing is shipped dry to prevent freezing in shipping. Refer to Application Note 2D: Instructions for Care

and Cleaning of Conductivity Cells for conductivity cell cleaning procedures and cleaning materials.

• The Active Use (after each cast) section of the application note

is not applicable to the MicroCAT, which is intended for use as a moored instrument.

To rinse or fill the conductivity cell and pump plumbing:

• Hold or clamp the MicroCAT with the connector end up, so that the

plumbing is in a U-shape.

• Pour the water or solution through the plumbing with a syringe or

wash bottle.

Plumbing Maintenance

Looking down on duct

A clogged bleed hole can trap air, preventing the pump from functioning properly; this will affect the data quality. Before each deployment, clean the bleed hole with 0.4 mm (0.016 inch) diameter (#26 AWG) wire; a wire is included in the spares kit that ships with the MicroCAT. Insert the wire 13 mm (0.5 inches) into the hole to clean it; verify it is clear by spraying water into the hole.

Bleed hole in duct

Manual revision 019 Section 5: Routine Maintenance and Calibration SBE 37-SMP RS-232

Detail - Battery/connector end cap

See detail

Handling Instructions for Plastic ShallowCAT Option

The MicroCAT’s standard 7000-meter titanium housing offers the best durability with a modest amount of care. The ShallowCAT option, substitution of a 350-meter plastic housing, saves money and weight. However, more care and caution in handling is required. To get the same excellent performance and longevity for the plastic-housing version:

• The MicroCAT’s battery end cap is retained by two screws through the

side of the housing. The screw holes are close to the end of the housing. Particularly in a cold environment, where plastic is more brittle, the potential for developing a crack around the screw hole(s) is greater for the plastic housing than for the titanium housing. Observe the following precautions –

below

Hex screw securing battery / connector end cap (one each side)

 When removing the end cap (to replace the batteries and/or to access

the electronics), be careful to avoid any impact in this area of the housing.

 When reinstalling the end cap, do not use excess torque on the

screws. Sea-Bird recommends tightening the screws to 15 inch-lbs. Alternatively, tighten the screws finger-tight, and then turn each screw an additional 45 degrees.

• A plastic housing is more susceptible to scratches than a titanium housing.

Do not use screwdrivers or other metal tools to pry off the end cap.

 Of primary concern are scratches on O-ring mating and sealing

surfaces. Take extra precaution to avoid a scraping contact with these surfaces when replacing batteries and/or re-seating the end cap.

 Also take care to keep the O-ring lubricated surfaces clean – avoid

trapping any sand or fine grit that can scratch the critical sealing surfaces. If the O-ring lubricant does accumulate any material or grit that can cause a leak or make a scratch, it must be carefully cleaned and replaced with fresh, clean lubricant (Parker Super O Lube).

 Shallow, external scratches are cosmetic only, and will not affect the

performance of the MicroCAT. However, deep external scratches can become points of weakness for deep deployments or fracture from impact during very cold weather.

• If you remove the screws securing the conductivity cell guard to the

housing (for example, to change the Anti-Foulant Devices), follow the same precautions as described above for removing and replacing the battery end cap.

See Battery Installation in Section 3: Preparing MicroCAT for Deployment and Appendix II: Electronics Disassembly / Reassembly for detailed step-by- step procedures for removing the MicroCAT’s end cap.

Manual revision 019 Section 5: Routine Maintenance and Calibration SBE 37-SMP RS-232

CAUTION:

Notes:

Replacing Batteries

1. Remove the 2 cap screws holding the I/O connector end cap to the

• For details and photos, see Installing Batteries in Section 3: Preparing MicroCAT for Deployment.

• Only use the battery pack with the yellow cover plate. Older

MicroCATs use a battery pack with a red cover plate; those packs are wired differently, and will not work properly in this MicroCAT.

• Batteries must be removed before returning the MicroCAT to Sea-Bird. Do not return used batteries to SeaBird when shipping the MicroCAT for calibration or repair.

• See Shipping Precautions in Section 1: Introduction.

MicroCAT housing. Remove the I/O end cap by twisting the end cap counter clockwise; the end cap will release from the housing. Pull the end cap out.

2. Loosen the captured screw holding the battery pack in the housing, and

remove the battery pack from the housing.

3. Place the handle in an upright position. Unscrew the yellow cover plate

from the top of the battery pack assembly.

4. Roll the 2 O-rings on the outside of the pack out of their grooves.

5. Remove the existing batteries. Install new batteries, alternating positive

(+) end first and negative (-) end first to match the labels on the pack.

6. Roll the O-rings into place in the grooves on the side of the battery pack.

7. Place the handle in an upright position. Reinstall the battery pack

cover plate.

8. Replace the battery pack assembly in the housing, and secure the

assembly with the captured screw. Plug in the Molex connector. Reinstall the MicroCAT end cap, and secure with the 2 cap screws.

Pressure Sensor (optional) Maintenance

The pressure port is located behind the mount clamp. The pressure port plug has a small vent hole to allow hydrostatic pressure to be transmitted to the pressure sensor inside the instrument, while providing protection for the

Pressure port plug

Do not put a brush or any object in the pressure port. Doing so may

damage or break the pressure sensor.

pressure sensor, keeping most particles and debris out of the pressure port.

Periodically (approximately once a year) inspect the pressure port to remove any particles, debris, etc:

1. Unscrew the pressure port plug from the pressure port.

2. Rinse the pressure port with warm, de-ionized water to remove any

particles, debris, etc.

3. Replace the pressure port plug.

Manual revision 019 Section 5: Routine Maintenance and Calibration SBE 37-SMP RS-232

CAUTIONS:

Shown with conductivity

Intake

Exhaust

Anti-Foulant

Conductivity

Thermistor

Conductivity cell guard

Remove screws

Shorter screw

Longer

Replacing Anti-Foulant Devices – Mechanical Design Change

The AF24173 Anti-Foulant Devices are installed at the conductivity cell intake and the pump exhaust. Details are provided below on replacing the AF24173 Anti-Foulant Devices. This page provides the mechanical details for the current version of the SBE 37-SMP MicroCAT. The following page, developed for an older version MicroCAT without a pump, provides the precautions and handling details.

• Be careful not to damage the glass conductivity cell or the thermistor when removing / replacing Anti-Foulant Devices.

• If applicable to your MicroCAT, see Handling Instructions for

Plastic ShallowCAT Option.

1. Remove the 4 Phillips-head screws holding the conductivity cell guard to

the housing. Carefully remove the cell guard.

2. Remove and replace the Anti-Foulant Devices.

3. Carefully replace the cell guard, securing it to the housing with the

4 Phillips-head screws.

(both sides, 4 total)

screw

cell

Devices

cell guard removed

Manual revision 019 Section 5: Routine Maintenance and Calibration SBE 37-SMP RS-232

WARNING!

CAUTION:

Cup

Cap Plug

Cap

AF24173

Replacing Anti-Foulant Devices (SBE 37-SI, SM, IM)

The MicroCAT has an anti-foulant device cup and cap on each end of the cell. New MicroCATs are shipped with an Anti-Foulant Device and a protective plug pre-installed in each cup.

Anti-Foulant Device

AF24173 Anti-Foulant Devices contain bis(tributyltin) oxide. Handle the devices only with rubber or latex gloves. Wear eye protection. Wash with soap and water after handling.

Read precautionary information on product label (see Appendix IV) before proceeding.

It is a violation of US Federal Law to use this product in a manner inconsistent with its labeling.

Wearing rubber or latex gloves, follow this procedure to replace each AntiFoulant Device (two):

1. Remove the protective plug from the anti-foulant device cup;

2. Unscrew the cap with a

/8-inch socket wrench;

3. Remove the old Anti-Foulant Device. If the old device is difficult

to remove:

• Use needle-nose pliers and carefully break up material;

• If necessary, remove the guard to provide easier access.

Place the new Anti-Foulant Device in the cup;

4. Rethread the cap onto the cup. Do not over tighten;

5. If the MicroCAT is to be stored, reinstall 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.

Cup

Anti-foulant device cups 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-foulant device cup to the guard.

2. Remove the four Phillips-head screws connecting the guard to the housing and sensor end cap.

3. Gently lift the guard away.

Manual revision 019 Section 5: Routine Maintenance and Calibration SBE 37-SMP RS-232

Notes:

Conductivity

Thermistor

Sensor Calibration

• Batteries must be removed before returning the MicroCAT to Sea-Bird. Do not return used batteries to Sea-Bird when shipping the MicroCAT for recalibration or repair.

• Please remove AF24173 AntiFoulant Devices from the antifoulant device cup before returning the MicroCAT to SeaBird. Store them for future use. See Replacing Anti-Foulant Devices for removal procedure.

cell

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 sensors on 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 sensor 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 — unlike platinum or copper elements — the thermistor is insensitive to shock.

Note:

Manual revision 019 Section 5: Routine Maintenance and Calibration SBE 37-SMP RS-232

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 the MicroCAT’s 0.10% error specification with some allowance for aging and ambient-temperature induced drift.

Pressure sensors show most of their error as a linear offset from zero. A technique is provided below for making small corrections to the pressure sensor calibration using the offset (POffset=) calibration coefficient term by comparing MicroCAT pressure output to readings from a barometer.

Allow the MicroCAT to equilibrate in a reasonably constant temperature environment for at least 5 hours before starting. Pressure sensors exhibit a transient change in their output in response to changes in their environmental temperature. Sea-Bird instruments are constructed to minimize this by thermally

The MicroCAT’s pressure sensor is an absolute sensor, so its raw output (OutputFormat=0) includes the effect of atmospheric pressure (14.7 psi). As shown on the Calibration Sheet, SeaBird’s calibration (and resulting calibration coefficients) is in terms of psia. However, when outputting pressure in engineering units, 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

Offset Correction Example Absolute pressure measured by a barometer is 1010.50 mbar. Pressure displayed from MicroCAT is -2.5 dbars. Convert barometer reading to dbars using the relationship: mbar * 0.01 = dbar Barometer reading = 1010.50 mbar * 0.01 = 10.1050 dbar The MicroCAT’s internal calculations output gage pressure, using an assumed value of 14.7 psi for atmospheric pressure. Convert MicroCAT reading from gage to absolute by adding 14.7 psia to the MicroCAT’s output:

-2.5 dbars + (14.7 psi * 0.689476 dbar/psia) = -2.5 + 10.13 = 7.635 dbars Offset = 10.1050 – 7.635 = + 2.47 dbars Enter offset in MicroCAT.

decoupling the sensor from the body of the instrument. However, there is still some residual effect; allowing the MicroCAT to equilibrate before starting will provide the most accurate calibration correction.

1. Place the MicroCAT in the orientation it will have when deployed.

2. In Seaterm232: A. Set the pressure offset to 0.0 (POffset=0). B. Set the output format to converted decimal (OutputFormat=1), so the

pressure output will be in decibars.

C. Send TSN:100 to take 100 samples and transmit data.

3. Compare the MicroCAT output to the reading from a good barometer at the same elevation as the MicroCAT’s pressure sensor port. Calculate offset = barometer reading – MicroCAT reading

4. Enter the calculated offset (positive or negative) in the MicroCAT’s EEPROM, using POffset= in Seaterm232.

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

/16-20 straight thread for mechanical connection to the pressure source. Use a fitting that has an O-ring tapered seal, such as Swagelok-200-1-4ST, which conforms to MS16142 boss.

Manual revision 019 Section 6: Troubleshooting SBE 37-SMP RS-232

Section 6: Troubleshooting

This section reviews common problems in operating the MicroCAT, and provides the most common causes and solutions.

Problem 1: Unable to Communicate with MicroCAT

If OutputExecutedTag=N, the S> prompt indicates that communications between the MicroCAT and computer have been established. Before proceeding with troubleshooting, attempt to establish communications again by selecting Connect in the Communications menu in Seaterm232 or pressing the Enter key several times.

Cause/Solution 1: The I/O cable connection may be loose. Check the cabling between the MicroCAT and computer for a loose connection.

Cause/Solution 2: The instrument communication settings may not have been entered correctly in Seaterm232. Verify the settings in the Serial Port Configuration dialog box (Communications menu -> Configure). The settings should match those on the instrument Configuration Sheet.

Cause/Solution 3: The I/O cable between the MicroCAT and computer may not be the correct one. The I/O cable supplied with the MicroCAT permits connection to standard 9-pin RS-232 interfaces.

Problem 2: No Data Recorded

Cause/Solution 1: The memory may be full; once the memory is full, no further data will be recorded. Verify that the memory is not full using GetSD or DS (free = 0 or 1 if memory is full). Sea-Bird recommends that you upload all previous data before beginning another deployment. Once the data is uploaded, send InitLogging to reset the memory. After the memory is reset, GetSD or DS will show samples = 0.

Problem 3: Unreasonable T, C, or P Data

The symptom of this problem is a data file that contains unreasonable values (for example, values that are outside the expected range of the data).

Cause/Solution 1: A data file with unreasonable (i.e., out of the expected range) values for temperature, conductivity, or pressure may be caused by incorrect calibration coefficients in the MicroCAT. Send GetCC to verify the calibration coefficients in the MicroCAT match the instrument Calibration Certificates. Note that calibration coefficients do not affect the raw data stored in MicroCAT memory.

• If you have not yet overwritten the memory with new data, you can

correct the coefficients and then upload the data again.

• If you have overwritten the memory with new data, you can manually

correct the coefficients in the .xmlcon configuration file, and then reprocess the data in SBE Data Processing’s Data Conversion module.

Manual revision 019 Section 6: Troubleshooting SBE 37-SMP RS-232

Cause/Solution 2: Minimal changes in conductivity are an indication that the pump flow is not correct. Poor flushing can have several causes:

• Air in the plumbing may be preventing the pump from priming. This

can result from:

- A clogged air bleed hole; clean the air bleed hole (see Plumbing Maintenance in Section 5: Routine Maintenance and Calibration).

- Incorrect orientation for a shallow deployment in a location with breaking waves; see Optimizing Data Quality / Deployment Orientation in Section 4: Deploying and Operating MicroCAT.

• The pump may be clogged by sediment. Using a wash bottle, flush

the plumbing to attempt to dislodge the sediment. If the sediment is impacted and you cannot flush it, return the MicroCAT to Sea-Bird for servicing. To minimize ingestion of sediment for future deployments, see Optimizing Data Quality / Deployment Orientation in Section 4: Deploying and Operating MicroCAT.

• The pump may not be turning on before each sample, if

MinCondFreq= is set too high. See Command Descriptions in Section 4: Deploying and Operating MicroCAT for details.

Problem 4: Salinity Spikes

Salinity is a function of conductivity, temperature, and pressure, and must be calculated from C, T, and P measurements made on the same parcel of water. Salinity is calculated and output by the 37-SMP if OutputSal=Y. Alternatively, salinity can be calculated in SBE Data Processing’s Data Conversion module from the data uploaded from memory (.hex file) or in SBE Data Processing’s Derive module from the converted (.cnv) file.

[Background information: Salinity spikes in profiling (i.e., moving, fast sampling) instruments typically result from misalignment of the temperature and conductivity measurements in conditions with sharp gradients. This misalignment is often caused by differences in response times for the temperature and conductivity sensors, and can be corrected for in postprocessing if the T and C response times are known.]

In moored, pumped instruments such as the 37-SMP MicroCAT, the pump flushes the conductivity cell at a faster rate than the environment changes, so the T and C measurements stay closely synchronized with the environment (i.e., even slow or varying response times are not significant factors in the salinity calculation). More typical causes of salinity spikes in a moored 37-SMP include:

Cause/Solution 1: Severe external bio-fouling can restrict flow through the conductivity cell to such an extent that the conductivity measurement is significantly delayed from the temperature measurement.

Cause/Solution 2: For a MicroCAT moored at shallow depth, differential solar heating can cause the actual temperature inside the conductivity cell to differ from the temperature measured by the thermistor. Salinity spikes associated mainly with daytime measurements during sunny conditions may be caused by this phenomenon.

Cause/Solution 3: For a MicroCAT moored at shallow depth, air bubbles from breaking waves or spontaneous formation in supersaturated conditions can cause the conductivity cell to read low of correct.

Note: Note:

Note:

Manual revision 019 Glossary SBE 37-SMP RS-232

Glossary

Battery pack – 12 AA lithium batteries in a battery holder that connects

The 37-SMP battery pack has a yellow cover plate. Older MicroCATs used a battery pack with a red cover plate; the wiring of that pack is different from this one, and cannot be used with this MicroCAT.

All Sea-Bird software listed was designed to work with a computer running Windows XP service pack 2 or later, Windows Vista, or Windows 7.

IDO MicroCATs are integrated with SBE 43F DO sensors (Clark polarographic membrane type). ODO MicroCATs are integrated with SBE 63 Optical DO sensors.

4 cells in series and each series string in parallel. Battery pack uses:

• Saft LS 14500, AA, 3.6 V and 2.6 Amp-hours each

(www.saftbatteries.com) (recommended),

• Tadiran TL-4903, AA, 3.6 V and 2.4 Amp-hours each

(www.tadiran.com), or

• Electrochem 3B0064/BCX85, AA, 3.9 V and 2.0 Amp-hours each

(www.electrochemsolutions.com)

Deployment Endurance Calculator – Sea-Bird’s Windows software used to calculate deployment length for moored instruments, based on user-input deployment scheme, instrument power requirements, and battery capacity.

Fouling – Biological growth in the conductivity cell during deployment.

MicroCAT (SBE 37) – High-accuracy conductivity, temperature, and

optional pressure Recorder/Sensor. A number of models are available:

• 37-IM (Inductive Modem, internal battery and memory)

• 37-IMP (Inductive Modem, internal battery and memory, integral Pump)

• 37-IMP-IDO (Inductive Modem, internal battery and memory, integral

Pump, Integrated Dissolved Oxygen sensor) – includes internal RS-232 interface

• 37-IMP-ODO (Inductive Modem, internal battery and memory, integral

Pump, Optical Dissolved Oxygen sensor) – includes internal RS-232

interface

• 37-SM (Serial interface, internal battery and Memory)

• 37-SMP (Serial interface, internal battery and Memory, integral Pump)

• 37-SMP-IDO (Serial interface, internal battery and Memory, integral

Pump, Integrated Dissolved Oxygen sensor)

• 37-SMP-ODO (Serial interface, internal battery and Memory, integral

Pump, Optical Dissolved Oxygen sensor)

• 37-SI (Serial Interface, memory, no internal battery) *

• 37-SIP (Serial Interface, integral Pump, memory, no internal battery) *

• 37-SIP-IDO (Serial Interface, integral Pump, Integrated Dissolved

Oxygen sensor, memory, no internal battery)

• 37-SIP-ODO (Serial Interface, integral Pump, Optical Dissolved Oxygen

sensor, memory, no internal battery) The serial interface versions are available with RS-232 (standard) or RS-485 (optional) interface. Some serial interface versions are also available with an SDI-12 interface. * Note: Version 3.0 and later of the 37-SI and 37-SIP include memory; earlier versions did not include memory.

PCB – Printed Circuit Board.

SBE Data Processing - Sea-Bird’s Windows data processing software,

which calculates and plots temperature, conductivity, and optional pressure, and derives variables such as salinity and sound velocity.

Scan – One data sample containing temperature, conductivity, optional pressure, and date and time, as well as optional derived variables (salinity and sound velocity).

Manual revision 019 Glossary SBE 37-SMP RS-232

Seasoft V2 – Sea-Bird’s Windows software package, which includes software for communication, real-time data acquisition, and data analysis and display. Seasoft V2 includes Deployment Endurance Calculator, SeatermV2, and SBE Data Processing.

SeatermV2 – Windows terminal program launcher, which launches the appropriate terminal program for the selected instrument (Seaterm232 for this MicroCAT).

Seaterm232 – Windows terminal program used with Sea-Bird instruments that communicate via an RS-232 interface, and that were developed or redesigned in 2006 and later. The common feature of these instruments is the ability to output data in XML.

Super O-Lube – Silicone lubricant used to lubricate O-rings and O-ring mating surfaces. Super O-Lube can be ordered from Sea-Bird, but should also be available locally from distributors. Super O-Lube is manufactured by Parker Hannifin (www.parker.com/ead/cm2.asp?cmid=3956).

TCXO – Temperature Compensated Crystal Oscillator.

Triton X-100 – Reagent grade non-ionic surfactant (detergent), used for

cleaning the conductivity cell. Triton can be ordered from Sea-Bird, but should also be available locally from chemical supply or laboratory products companies. Triton is manufactured by Avantor Performance Materials (www.avantormaterials.com/commerce/product.aspx?id=2147509608).

Manual revision 019 Appendix I: Functional Description SBE 37-SMP RS-232

Note:

Appendix I: Functional Description

Sensors

The MicroCAT embodies the same sensor elements (3-electrode, 2-terminal, borosilicate glass cell, and pressure-protected thermistor) previously employed in our modular SBE 3 and SBE 4 sensors and in the Seacat and Seacat plus family.

The MicroCAT’s optional strain-gauge pressure sensor is available in the

Pressure ranges are expressed in meters of deployment depth capability.

Sensor Interface

following pressure ranges: 20, 100, 350, 600, 1000, 2000, 3500, and 7000 meters. Compensation of the temperature influence on pressure offset and scale is performed by the MicroCAT’s CPU.

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.

Real-Time Clock

To minimize power and improve clock accuracy, a temperature-compensated crystal oscillator (TCXO) is used as the real-time-clock frequency source. The TCXO is accurate to ± 1 minute per year (0 ºC to 40 ºC).

Manual revision 019 Appendix II: Electronics Disassembly/Reassembly SBE 37-SMP RS-232

CAUTION:

Threaded rod with

Cell guard

Remove

Appendix II: Electronics Disassembly/Reassembly

See Section 5: Routine Maintenance and Calibration for handling

instructions for the plastic ShallowCAT housing.

Phillips-head screw

Disassembly:

1. Remove the connector end cap and battery pack following instructions in

Section 3: Preparing MicroCAT for Deployment.

2. Remove two screws connecting the conductivity cell guard to the housing.

Put one of the removed battery end cap screws in the machined detail.

Remove the housing by twisting the housing counter clockwise; the

housing will release.

screw, both sides, 2 total)

3. The electronics are on a sandwich of three rectangular PCBs. These PCBs

are assembled to a bulkhead. To remove the PCB assembly:

A. Use a long screwdriver (#1 screwdriver) to remove the Phillips-head

screw. The Phillips-head screw is a 198 mm (7.8 inch) threaded rod with Phillips-head.

B. Pull out the PCB assembly using the pylon (post with connector). The

assembly will pull away from the edge connector used to connect to the sensors. If needed, pull the sandwich of three rectangular PCBs from the bulkhead.

Machined detail – place cap screw here

Note:

desiccation of the electronics.

Note:

Threaded rod with

Manual revision 019 Appendix II: Electronics Disassembly/Reassembly SBE 37-SMP RS-232

Reassembly:

1. Replace all the components as shown at left. Tighten gently the threaded

If the rod will not tighten, the PCBs have not fully mated or are mated in reverse.

rod with Phillips-head screw. A gentle resistance can be felt as the PCB

assembly mates to the edge connector.

Phillips-head screw

2. Replace the housing on the end cap:

A. Remove any water from the O-rings and mating surfaces 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.

B. Carefully fit the housing onto the housing until the O-rings are

fully seated.

Before delivery, a desiccant package is inserted in the housing and the electronics chamber is filled with dry Argon gas. These measures help prevent condensation. To ensure proper functioning:

1. Install a new desiccant bag each time you open the electronics chamber. If a new bag is not available, see Application

Note 71: Desiccant Use and Regeneration (drying).

2. If possible, dry gas backfill each time you open the housing. If you cannot, wait at least 24 hours before redeploying, to allow the desiccant to remove any moisture from the housing.

Note that opening the battery compartment does not affect

C. Reinstall the two Phillips-head screws to secure the housing.

3. Reinstall the battery pack and end cap following instructions in

Section 3: Preparing MicroCAT for Deployment.

Manual revision 019 Appendix III: Command Summary SBE 37-SMP RS-232

GetCD

GetSD

GetCC

GetEC

ResetEC

GetHD

DateTime=

mmddyyyyhhmmss

x= baud rate (600, 1200, 2400, 4800, 9600, 19200,

38400, 57600, or 115200). Default 9600.

OutputExecutedTag=

x=Y: output real-time data while sampling

x=N: do not.

x= reference pressure (gauge) in decibars (used for

but data logging and memory retention unaffected.

x= minimum conductivity frequency (Hz) to

PumpOn

PumpOff

Initialize logging to make entire memory available for

x= sample number for last sample in memory. SampleNumber=0 equivalent to InitLogging.

x=0 x=Y

x=N: do not.

x=Y: calculate and output sound velocity (m/sec).

x=N: do not.

StartNow

StartDateTime=

mmddyyyyhhmmss

StartLater

Start logging at delayed logging start time.

Stop logging or stop waiting to start logging. Press

Note:

Appendix III: Command Summary

COMMAND DESCRIPTION

Get and display configuration data. Get and display status data. Get and display calibration coefficients. Get and display event counter data. Reset event counter. Get and display hardware data. Get and display status and configuration data. Get and display calibration coefficients.

Set real-time clock month, day, year, hour, minute, second.

BaudRate=x

x=Y: Display XML Executing and Executed tags. x=N: Do not.

TxRealTime=x

autonomously or in serial line sync mode.

See Command Descriptions in Section 4: Deploying and Operating MicroCAT for

detailed information and examples.

Appendix IV: AF24173 Anti-Foulant Device

AF24173 Anti-Foulant Devices supplied for user replacement are supplied in polyethylene bags displaying the following label:

FOR USE ONLY IN SEA-BIRD ELECTRONICS' CONDUCTIVITY SENSORS TO CONTROL THE GROWTH OF AQUATIC ORGANISMS WITHIN ELECTRONIC CONDUCTIVITY SENSORS.

ACTIVE INGREDIENT:

Bis(tributyltin) oxide…………..…………………………..... 53.0%

OTHER INGREDIENTS: ………………………………..... 47.0%

Total………………………………………………………..... 100.0%

DANGER

See the complete label within the Conductivity Instrument Manual for Additional Precautionary Statements and Information on the Handling, Storage, and Disposal of this Product.

Net Contents: Two anti-foulant devices Sea-Bird Electronics, Inc. EPA Registration No. 74489-1 13431 NE 20 Bellevue, WA 98005

Street EPA Establishment No. 74489-WA-1

AF24173 ANTI-FOULANT DEVICE

Manual revision 019 Appendix IV: AF24173 Anti-Foulant Device SBE 37-SMP RS-232

FIRST AID

If on skin or

Call a poison control center or doctor for treatment advice.

If swallowed

Call poison control center or doctor immediately for treatment advice.

Do not give anything by mouth to an unconscious person.

If in eyes

Call a poison control center or doctor for treatment advice.

HOT LINE NUMBER

Note to Physician

Probable mucosal damage may contraindicate the use of gastric lavage.

Have the product container or label with you when calling a poison control center or doctor, or

AF24173 Anti-Foulant Device

FOR USE ONLY IN SEA-BIRD ELECTRONICS’ CONDUCTIVITY SENSORS TO CONTROL THE GROWTH OF AQUATIC ORGANISMS WITHIN ELECTRONIC CONDUCTIVITY SENSORS.

ACTIVE INGREDIENT:

Bis(tributyltin) oxide…………..…………………………..... 53.0%

OTHER INGREDIENTS: ………………………………..... 47.0%

Total………………………………………………………..... 100.0%

DANGER

See Precautionary Statements for additional information.

• Take off contaminated clothing.

clothing

• Rinse skin immediately with plenty of water for15-20 minutes.

•

• Have person drink several glasses of water.

• Do not induce vomiting.

•

• Hold eye open and rinse slowly and gently with water for 15-20

minutes.

• Remove contact lenses, if present, after the first 5 minutes, then continue

rinsing eye.

•

going for treatment. For further information call National Pesticide Telecommunications Network (NPTN) at 1-800-858-7378.

Net Contents: Two anti-foulant devices

Sea-Bird Electronics, Inc. EPA Registration No. 74489-1 13431 NE 20 Bellevue, WA 98005

Street EPA Establishment No. 74489-WA-1

Manual revision 019 Appendix IV: AF24173 Anti-Foulant Device SBE 37-SMP RS-232

USER SAFETY RECOMMENDATIONS

PRECAUTIONARY STATEMENTS

HAZARD TO HUMANS AND DOMESTIC ANIMALS

DANGER

Corrosive - Causes irreversible eye damage and skin burns. Harmful if swallowed. Harmful if

absorbed through the skin or inhaled. Prolonged or frequently repeated contact may cause allergic reactions in some individuals. Wash thoroughly with soap and water after handling.

PERSONAL PROTECTIVE EQUIPMENT

Users should:

• Remove clothing immediately if pesticide gets inside. Then wash thoroughly and put on

clean clothing.

• Wear protective gloves (rubber or latex), goggles or other eye protection, and clothing to

minimize contact.

• Follow manufacturer’s instructions for cleaning and maintaining PPE. If no such instructions

for washables, use detergent and hot water. Keep and wash PPE separately from other laundry.

• Wash hands with soap and water before eating, drinking, chewing gum, using tobacco or

using the toilet.

ENVIRONMENTAL HAZARDS

Do not discharge effluent containing this product into lakes, streams, ponds, estuaries, oceans, or other waters unless in accordance with the requirements of a National Pollutant Discharge Elimination System (NPDES) permit and the permitting authority has 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. Do not contaminate water when cleaning equipment or disposing of equipment washwaters.

PHYSICAL OR CHEMICAL HAZARDS Do not use or store near heat or open flame. Avoid contact with acids and oxidizers.

DIRECTIONS FOR USE It is a violation of Federal Law to use this product in a manner inconsistent with its labeling. For use only in Sea-Bird Electronics’ conductivity sensors. Read installation instructions in the applicable Conductivity Instrument Manual.

Manual revision 019 Appendix IV: AF24173 Anti-Foulant Device SBE 37-SMP RS-232

STORAGE AND DISPOSAL

purpose. Offer for recycling, if available.

PESTICIDE STORAGE: Store in original container in a cool, dry place. Prevent exposure to heat or flame. Do not store near acids or oxidizers. Keep container tightly closed.

PESTICIDE SPILL PROCEDURE: In case of a spill, absorb spills with absorbent material. Put saturated absorbent material to a labeled container for treatment or disposal.

PESTICIDE DISPOSAL: Pesticide that cannot be used according to label instructions must be disposed of according to Federal or approved State procedures under Subtitle C of the Resource Conservation and Recovery Act.

CONTAINER HANDLING: Nonrefillable container. Do not reuse this container for any other

Sea-Bird Electronics/label revised 01-28-10

Manual revision 019 Appendix V: Replacement Parts SBE 37-SMP RS-232

firmware version 4.0 and

Appendix V: Replacement Parts

Part

Number

50441

801863

801542

30411 Triton X-100

801385

17043

17046.1

801206

171192

171398.1

171888

AA Saft Lithium battery set (12)

Battery holder for MicroCATs with

later

AF24173 Anti-Foulant Device

4-pin RMG-4FS to 9-pin DB-9S I/O cable with power leads,

2.4 m (8 ft)

Locking sleeve (for RMG)

4-pin RMG-4FS dummy plug with locking sleeve

4-pin MCIL-4FS (wetpluggable connector) to 9-pin DB-9S I/O cable with power leads,

2.4 m (8 ft) long

Locking sleeve (wetpluggable connector)

4-pin MCDC-4-F dummy plug with locking sleeve, wetpluggable connector

25-pin DB-25S to 9-pin DB-9P cable adapter

Part Application Description

Continued on next page

Power MicroCAT 1

Holds batteries. Note: This battery holder has a yellow cover plate. Older MicroCATs use a battery holder with a red cover plate; those packs are wired differently, and will not work properly in this MicroCAT.

Bis(tributyltin) oxide device inserted into anti-foulant device cup

Octyl Phenol Ethoxylate – Reagent grade non-ionic cleaning solution for conductivity cell (supplied in 100% strength; dilute as directed)

From MicroCAT to computer 1

Locks cable/plug in place 1

For when cable not used 1

From MicroCAT to computer 1

Locks cable/plug in place 1

For when cable not used 1

For use with computer with DB-25 connector

Quantity in

MicroCAT

1 (set of 2)

Manual revision 019 Appendix V: Replacement Parts SBE 37-SMP RS-232

Continued from previous page

Part

Number

60056

Part Application Description

Spare hardware / O-ring kit for 37-SMP

Assorted hardware and O-rings:

• 30900 Bolt, ¼-20 x 2”, Hex head,

titanium (secures guide to connector end cap and clamp to sensor end cap)

• 30633 Washer, ¼” Split Ring Lock,

titanium (for 30900)

• 30634 Washer, ¼” Flat, titanium (for

30900)

• 31019 O-ring, Parker 2-008

N674-70 (for 30900)

• 31066 Cap screw, 8-32 x ¾ socket

head, titanium (secures guide to connector end cap)

• 31873 Cap Screw, 6-32 x 1/2”,

socket head, titanium (secures clamp to sensor end cap)

• 30867 Washer, #6 split ring lock,

titanium (for 31873)

• 31755 Cap Screw, 8-32 x 1/4" SH,

titanium (secures connector end cap to housing)

• 30857 O-ring, Parker 2-033E515-80

(connector end cap O-rings)

• 30858 O-ring, Parker 2-133 N674-70

(battery pack end cap O-ring)

• 31322 O-ring, Parker 2-130 N674-70

(battery pack housing O-rings)

• 31749 Hex Key, 7/64" long arm,

DoALL BDH12106 (tool for battery pack)

• 31089 Screw, 10-32 x ½” FH

Phillips, titanium (secures cell guard to end cap)

• 31118 Screw, 10-32 x 3/8” FH

Phillips, titanium (secures cell guard to sensor end cap)

• 31516 Hex Key, 9/64" long arm,

DoALL AHT58010 (tool for guide)

• 311281 Removable shipping sticker

(covers cell intake and exhaust for storage)

• Air bleed valve wire kit (for clearing

bleed valve)

Quantity in

MicroCAT

Manual revision 019 Appendix VI: Manual Revision History SBE 37-SMP RS-232

Manual Version

001

04/03

• Initial release.

002

04/04

Add more information about limitations on shipping lithium batteries.

003

06/04

• Firmware 2.6: new board layout, new power specifications.

Add updated information on shipping restrictions for lithium batteries

004

05/05

005

05/06

Add more information to Recovery Warning.

006

12/06

007

06/07

008

04/08

009

07/08

010

08/08

011

01/09

Correction: Add PTempA0=, PTempA1=, PTempA2= to calibration coefficient commands.

Appendix VI: Manual Revision History

Date Description

• Firmware 2.4: Add averaging command.

• Firmware 2.5: Add commands for outputting salinity and sound velocity.

• Add description of flow path u-shape and necessary orientation.

• Update external power specification to 12-24 instead of 9-24 VDC, to prevent draining batteries.

• Add information on total cable resistance and on transient current needed for pump turn-on, for

optional external power.

• Reference P line appears in DS reply only if no P sensor installed.

•

• Update power consumption / cable length calculations.

•

• Add 600 m Druck pressure sensor.

• Update cleaning recommendations to correspond to revised application note 2D.

• Update AF24173 Anti-Foulant Device appendix to current label.

• Add troubleshooting section.

• Update battery shipping precautions.

• Add details on how to process MicroCAT data in SBE Data Processing’s Derive module.

• Add caution about not running pump dry.

• Update wet-pluggable connector information.

•

• Incorporate new bleed hole, change orientation recommendation.

• Add option for plastic housing.

• Add more explanation of NAvg=.

Update pressure port maintenance – SBE no longer putting silicon oil in port.

•

• Add handling precautions for plastic housing.

• Update for Version 3 firmware changes: many commands changed, power specifications changed,

pump operation changed.

• Add deployment recommendation that 37-SMP should be inclined > 10 degrees from horizontal.

• Change stability specification for pressure to per year instead of per month.

• Update connector maintenance information for consistency with application note 57.

• Add information that POffset is in decibars.

• Firmware revision 3.0c:

- if no P sensor is installed, reference pressure now appears in GetCD instead of GetCC, and appears in DS instead of DC.

- Minimum conductivity frequency line removed from GetCD response if PumpInstalled=n.

- SetPCBSerialNum1=, etc. removed.

• Update battery installation procedure, specifications, endurance, and shipping instructions for new

battery packs (12 AA lithium cells).

• Add information that pump runs for polled sampling, regardless of minimum conductivity

frequency. Correct cable length and external power example.

•

• Firmware revision 3.0f:

- Add new output format to match format available from firmware < 3.0. DDb,e now uploads data in this new format.

- If StartLater>90 days in future, does StartNow.

Continued on next page

• Manufacturing change: for plastic housing, 2 phillips-head screws at connector end cap end and 1

at sensor end cap end are replaced with hex screws. 9/64” allen wrench shipped with instrument.

• Update for SeatermV2 terminal program.

• Add information about compatibility with Vista.

•

Manual revision 019 Appendix VI: Manual Revision History SBE 37-SMP RS-232

012

01/10

013

07/10

Add 60053 spares kit for plastic housing.

014

10/10

• Update for changes to SeatermV2 version 1.1 (upload now converts .xml file to .hex and .xmlcon

manufacturers).

015

03/11

• SeatermV2 1.1b changes:

016

04/11

017

08/12

018

01/13

Fix typos.

019

09/13

Continued from previous page

• Add information about Deployment Endurance Calculator.

• Change Seasoft-Win32 to Seasoft V2, update file name to SeasoftV2_date.exe.

• SBE Data Processing 7.20a: Add information about .xmlcon file.

• Add CE mark.

• Update SBE address.

Update anti-foul label in Appendix with new Container Handling requirement and new address.

•

• Firmware 3.0j: Fixed bug related to StartDateTime=. Previously, when StartLater was sent,

register ignored month in StartDateTime=, and started at the next day and time corresponding to the day and time (example: if it is July 1 and you set it to start on August 15, it ignored the August part of the date, and started on July 15). Documentation said could be started 90 days out, but this actually limited it to 30 days out. Now, it provides a message saying it will start logging in 5 seconds if the start date is more than 30 days out.

•

files, which are used in Data Conversion to convert to .cnv file for further processing).

• Remove references to Druck pressure sensors (pressure sensors can be supplied by other

- Update upload procedure, Seaterm232 now automatically starts SBE Data Processing after upload

- Update SeatermV2 Instruments list screen capture

• Add information about compatibility with Windows 7

• Firmware Version 4.0 MicroCAT, new electronics, new mechanical configuration, new high-

efficiency pump, new battery pack.

• Update Shipping Precautions for latest IATA rules.

• Add Declaration of Conformity.

• Add cable and wiring diagrams.

• Add more information on selecting output variables for data processing of uploaded data.

• Triton – update company name (Avantor Performance Materials) and link.

• Remove factory-set commands: SetPressureInstalled=, SetMfgDate=, SetPCBAssembly=,

SetPCBSerialNum=.

• Glossary - Add information on ODO MicroCATs

• Sampling Mode examples -- Add setting date/time to all examples, and add setting output format

to sync mode example.

• Update configuration dialog box in SBE Data Processing.

• Add weights for titanium version to specifications.

• Fix typos.

• Update battery shipping restrictions to meet 2013 requirements.

• Update Serial Port Configuration dialog box.

• Update Upload dialog box.

• Update software compatibility information.

• Add information about limitations with 115200 baud rate.

•

• Update plastic housing depth rating to 350 meters.

• Update SeatermV2 screen capture and Upload dialog box.

• Add information on editing raw .hex files.

• Update photo in Calibration section.

• Update contents of spare hardware & o-ring kit.

• Add information on new protective label to cover intake and exhaust, in place of plugs that were

used previously.

• Update information on cleaning air bleed valve.

• Clarify that accuracy specifications are ±.

• Glossary - Add information on SDI-12 MicroCATs.

• Update Declaration of Conformity.

Fix typos.

•

Manual revision 019 Index SBE 37-SMP RS-232

Index

.hex files

editing · 58

Air bleed hole · 47, 60 Anti-Foulant Device · 76

removal before shipping to Sea-Bird · 65 replacing · 63, 64

Autonomous sampling · 27, 41

Batteries · 11, 48

description · 17 endurance · 14 installing · 17 replacing · 62

shipping precautions · 8 Battery endurance · 10, 19 Baud rate · 29, 38 Bleed hole · 47, 60

Cable length · 29 Cables · 13 Calibration · 65 CE certification · 3 Cleaning · 60 Clock · 11, 71 Command summary · 74 Commands

autonomous sampling · 41

baud rate · 38

calibration coefficients · 44

data format · 40

data upload · 43, 51

date and time · 38

descriptions · 30

general setup · 38

logging · 41

memory setup · 40

polled sampling · 42

pump setup · 39

serial line sync · 42

status · 31

upload · 51 Communication defaults · 22 Conductivity cell · 71

cleaning · 60 Conductivity sensor calibration · 65 Connector · 12, 59 Corrosion precautions · 59

Data Conversion · 54 Data format · 40, 45 Data processing · 10, 19, 51, 54 Data upload · 43, 51 Date and time · 38 Declaration of Conformity · 3 Deployment · 47

installation · 49 preparing for · 17

setup · 48 Deployment Endurance Calculator · 10, 14, 19 Deployment orientation · 10, 12, 49 Derive · 54 Description · 9 Dimensions · 12

Editing data files · 58 Electronics disassembly/reassembly · 72 End cap · 59 End cap connector · 12 External power · See Power, external

Flooded MicroCAT · 50 Format

data · 45 Functional description · 71

Glossary · 69 Guard

removal · 63, 64

Initializing memory · 40

Limited liability statement · 2 Logging · 27, 41

Maintenance · 59 Manual revision history · 82 Memory · 11 Memory setup · 40 Modes · See Sampling modes Mounting · 47

Manual revision 019 Index SBE 37-SMP RS-232

Orientation · 47 Output format · 40, 45

Parker Super O-Lube · 70 Parts

replacement · 80

Plastic housing

handling · 61

Plumbing

maintenance · 60 Polled sampling · 42 Power

endurance · 10, 19

external · 11, 15 Pressure sensor · 71

maintenance · 62 Pressure sensor calibration · 65 Processing data · 51 Pump · 10, 11, 12, 25, 41, 42, 47, 49 Pump setup commands · 39

Quick start · 6

Temperature sensor calibration · 65 Terminal program · 10, 19, 20, 51 Testing · 19 Thermistor · 71 Timeout description · 29 Transient current · 15 Triton · 70 Troubleshooting · 67

Unpacking MicroCAT · 7 Upload · 43 Uploading data · 51

Versions · 82

Wiring · 13, 19

Real-time setup

baud rate · 29

cable length · 29 Recovery · 50

uploading data · 51 Replacement parts · 80 Revision history · 82

Sample timing · 14 Sampling modes · 25

autonomous · 27, 41

logging · 41

polled · 26, 42

serial line sync · 28, 42 SBE Data Processing · 10, 19, 54 Sea Plot · 54 Seasoft · 10, 19 Seaterm232 · 10, 19, 20, 51 SeatermV2 · 10, 19, 20, 51 Sensors · 11 Serial line sync · 28, 42 Setup commands · 38 ShallowCAT

handling · 61 Shipping precautions · 8 Software · 10, 19 Specifications · 11 Status commands · 31 Storage · 60 Super O-Lube · 70 System description · 9

Sea-Bird Electronics SBE 37-SMP MicroCAT User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SBE 37-SMP MicroCAT

Limited Liability Statement

Declaration of Conformity

Table of Contents

Section 1: Introduction

About this Manual

Quick Start

Unpacking MicroCAT

Shipping Precautions

Section 2: Description of MicroCAT

System Description

Specifications

Dimensions and End Cap Connector

Cables and Wiring

Sample Timing

Battery Endurance

External Power

Cable Length and External Power

Section 3: Preparing MicroCAT for Deployment

Battery Installation

Software Installation

Power and Communications Test

Test Setup

Test

Section 4: Deploying and Operating MicroCAT

Sampling Modes

Polled Sampling

Autonomous Sampling (Logging commands)

Serial Line Synchronization (Serial Line Sync)

Real-Time Data Acquisition

Timeout Description

Command Descriptions

Data Formats

Optimizing Data Quality / Deployment Orientation

Setup for Deployment

Deployment

Recovery

Uploading and Processing Data

Editing Raw Data File

Section 5: Routine Maintenance and Calibration

Corrosion Precautions

Connector Mating and Maintenance

Conductivity Cell Maintenance

Plumbing Maintenance

Handling Instructions for Plastic ShallowCAT Option

Replacing Batteries

Pressure Sensor (optional) Maintenance

Replacing Anti-Foulant Devices – Mechanical Design Change

Replacing Anti-Foulant Devices (SBE 37-SI, SM, IM)

Sensor Calibration

Section 6: Troubleshooting

Problem 1: Unable to Communicate with MicroCAT

Problem 2: No Data Recorded

Problem 3: Unreasonable T, C, or P Data

Problem 4: Salinity Spikes

Glossary

Appendix I: Functional Description

Sensors

Sensor Interface

Real-Time Clock

Appendix II: Electronics Disassembly/Reassembly

Appendix III: Command Summary

Appendix IV: AF24173 Anti-Foulant Device

Appendix V: Replacement Parts

Appendix VI: Manual Revision History

Index