ohmex SONARMITE Manual
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ohmex SONARMITE Manual

Portable bluetooth echo sounder
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SonarMite BTx/SPx v5.02 © 2016 Lymtech
SONARMITE v5.xx
BTX/SPX single beam
PORTABLE BLUETOOTH ECHO SOUNDER
Ohmex is a company formed to manufacture and distribute products designed by Lymtech Ltd. a company established in 1982 w
founded on technological innovation and design. The company prides itself on being the first to produce products in the field of
instrumentation and software used within the Earth Science sectors. Achievements to date include DGM ,the first digital ground
modelling software to run on a standard PC, SONARLITE, the first truly portable echo sounder, TIDALITE the first portable
Tide Gauge, EDAS, Integrated tide and weather networked software for use by ports and harbours. SONARMITE the first
portable Bluetooth echo sounder based on WinSTRUMENTATION - The integration of Instrumentation, Wireless networks and
modern portable computer equipment.
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  • Page 1 PORTABLE BLUETOOTH ECHO SOUNDER Ohmex is a company formed to manufacture and distribute products designed by Lymtech Ltd. a company established in 1982 w founded on technological innovation and design. The company prides itself on being the first to produce products in the field of instrumentation and software used within the Earth Science sectors.
  • Page 2 The popular SonarW7 software has been updated to the latest Windows versions. Software for the 'front end' of the SonarMite is available to run on a wide range of devices from Pocket PCs through to the full range of desktop systems running the Windows operating system.
  • Page 3 SonarMite BTx/SPx v5.02 © 2016 Lymtech Typical Use of the Equipment The SonarMite Portable Echo Sounder has been designed to provide a portable instrument that provides the facilities of a „professional‟ sounder at the cost and performance of a „fish finder‟ device. It is important to recognize what the differences are between these two types of echo sounder.

  • Page 4: Equipment Supplied

    SonarMite BTx/SPx v5.02 © 2016 Lymtech Equipment Supplied The SonarMite BTX is supplied as standard with the following list of equipment … SonarMite main processor unit c/w Bluetooth Antenna  Universal EU/US/UK internal battery charger  „Smart‟ P66 depth transducer c/w 5m cable and embedded processor ...
  • Page 5 SonarMite BTx/SPx v5.02 © 2016 Lymtech The SonarMite SPX is a budget version of the SonarMite supplied as standard without Bluetooth, internal batteries, charger or IP68 Transit case, the following is a list of equipment supplied … SonarMite main processor unit c/w 1.5m 12v battery leads ...
  • Page 6 12/24vDC battery or source, the internal power circuit is protected against reverse polarity connection. SonarMite BTX OEM single beam echo sounder The SonarMite OEM variants are supplied as per the standard versions but without the following items of equipment … Internal rechargeable batteries – external power ...

  • Page 7: Installation And Use

    SonarMite BTx/SPx v5.02 © 2016 Lymtech The SonarMite BTX/SPX is a compact, portable, low power system for use in shallow water hydrographic surveys, it's small size and low power requirements make the system easy to deploy and transport to remote or inaccessible sites. The SonarMite BTX/SPX is a single beam echo sounder providing a wider range of solutions for surveyors working in shallow water hydrographic surveying.

  • Page 8: Internal Battery Charging

    SonarMite. The user can either measure the speed of sound in water by taking velocity profiles using a dedicated velocity measuring device or can use the SonarMite static over a known depth to a flat, firm base and then compare the measured value with the known depth.
  • Page 9 SonarMite BTx/SPx v5.02 © 2016 Lymtech WARNING – Only the correct NiMh battery charger should be used with the SonarMite Page 9...
  • Page 10 SonarMite BTx/SPx v5.02 © 2016 Lymtech Page 10...

  • Page 11: Reverse Voltage Protection

    SonarMite BTx/SPx v5.02 © 2016 Lymtech Reverse Voltage Protection The SonarMite SPx is protected from reverse connection or direct short circuit by an internal diode and 1 Amp thermal fuse. If the fuse is tripped then the system will need to be disconnected for 1 minute for the fuse to cool down and reset itself.
  • Page 12 SonarMite BTx/SPx v5.02 © 2016 Lymtech DEPTH TRANSDUCER The SonarMite system uses a „boat‟ shaped P66 transducer in a „knock off‟ fitting for fixing to the transom of a light boat or more commonly in a temporary mounting using a survey detail pole.
  • Page 13 SonarMite BTx/SPx v5.02 © 2016 Lymtech The only important consideration in mounting is that the transducer is always in the water and that the transducer does not represent an obstacle when the boat is used at higher speeds (i.e getting to the survey location). If at all possible mounting the transducer directly below the positioning antenna reduces the calculation of X/Y offset to zero.

  • Page 14: Bluetooth Interface

    SonarMite BTx/SPx v5.02 © 2016 Lymtech BLUETOOTH INTERFACE The SonarMite deck box provides a fully compliant wireless Bluetooth™ Class 1 Master and Slave function via a simple UART or RS232 interface. The Bluetooth Wireless will provide connectivity to any device supporting either a UART or RS232 interface.
  • Page 15 The remote device will “discover” other Bluetooth devices. The Bluetooth  device will appear as “SMnnnnnn” (where nnnnnn is serial number). The remote device will need to “Pair” with the SonarMite Bluetooth. The pin  number is then entered. The remote device will connect to the serial port service of the SonarMite ...

  • Page 16: Serial Interface

    SonarMite BTx/SPx v5.02 © 2016 Lymtech SERIAL INTERFACE In addition to Bluetooth on the BTX all SonarMites have a serial interface which can connect to a computer using RS232 protocol. The default settings are … 4800 Baud Rate 8 Bit 1 Stop Bit No Parity...
  • Page 17 SonarMite BTx/SPx v5.02 © 2016 Lymtech Typical Windows HyperTerminal settings    Hyperterminal ASCII settings   Hyperterminal Connection settings Page 17...
  • Page 18 SonarMite BTx/SPx v5.02 © 2016 Lymtech CONNECTIONS The only accessible connectors on the SonarMite are those on the front of the machine referred to as the „Transducer or TXR‟ and „Computer or PC‟ connections. There are no user connections or serviceable parts within the SonarMite body itself.

  • Page 19: 'Transducer' Connection

    SonarMite BTx/SPx v5.02 © 2016 Lymtech ‘Transducer’ connection This 6 way male connector is used to connect to the SonarMite transducer, the same connection is also used for the battery charger connector. Transducer and Computer connections Page 19...
  • Page 20 SonarMite BTx/SPx v5.02 © 2016 Lymtech LED Status Feedback The front of the SonarMite panel has two LED indicators, one for current status information, the other for Bluetooth connection on/off. Front Panel status LEDs Connector Caution The MIL spec connectors have a locking ring and also a retaining clip. Trying to remove the connector by unscrewing the retaining clip will twist the internal cable and could cause a serious fault.

  • Page 21: Flash Memory

    SonarMite BTx/SPx v5.02 © 2016 Lymtech APPENDIX SonarMite Settings The SonarMite when connected via Bluetooth to a serial communications program such as Hyperterminal has a basic set of simple single character commands used to set the basic parameters of the instrument.

  • Page 22: Memory Operations

    Commands shown in parenthesis [ ] are only available in the SYS> format. Memory Operations ☺ (^R)eset Pressing ^R (Contol R) will reset the SonarMite to its default values, these values are saved in Flash memory and set in current working RAM memory (only available in the SYS> output mode).

  • Page 23: General Operations

    (^F)ormat Pressing ^F (Contol F) will toggle the output formats as below … Format 0 Old SonarMite format with null HPR (e.g. 1 1.88 0 0 0.0 12.7 128 20) 1 0.48 0 0 0 8.9 115 0 1 0.48 0 0 0 8.9 115 0 1 0.48 0 0 0 17.8 116 0...
  • Page 24 SonarMite BTx/SPx v5.02 © 2016 Lymtech Format 1 Simple ASCII mode (e.g. 1.92 ) 0.48 0.48 0.48 0.48 0.48 0.48 0.48 Example Simple ASCII Output Format 2 DBT NMEA mode (e.g. $SMDBT,5.94,f,1.81,M,,*67) $SMDBT,1.6,f,0.48,M,,*5C $SMDBT,1.6,f,0.48,M,,*5C $SMDBT,1.6,f,0.48,M,,*5C $SMDBT,1.6,f,0.48,M,,*5C $SMDBT,1.6,f,0.48,M,,*5C $SMDBT,1.6,f,0.48,M,,*5C Example NMEA DBT Output Format 3 DPT NMEA mode (e.g.
  • Page 25 SYS> 14 0.48 109 109 0 116 1500 8.9 0 SYS> 14 0.48 109 109 0 116 1500 8.9 0 Example System Output Format 8 New SonarMite format (e.g. 1 1.88 12.7 128 20) 1 0.48 8.9 115 0 1 0.48 8.9 115 0 1 0.48 8.9 115 0...
  • Page 26 SonarMite BTx/SPx v5.02 © 2016 Lymtech ☺ (^I)d Toggle the ID number of the instrument. This function is intended for use in multiple transducer systems running in polled mode. ☺ (^U)p Increase the sound velocity setting for dense cold water (only available in the SYS>...

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