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Related Manuals for Marine Magnetics Sentinel2
Summary of Contents for Marine Magnetics Sentinel2
- Page 1 Sentinel2 Base Station Magnetometer Operating Manual Revision 1.2 2022-10 Tel: : +1 905 479-9727 Marine Magnetics Corp 135 SPY Court Fax: +1 905 479-9484 Markham, ON Email: support@marinemagnetics.com L3R 5H6 Canada URL: www.marinemagnetics.com...
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Page 2: Table Of Contents
Marine Magnetics Sentinel2 Base Station Magnetometer Operating manual Contents Introduction ......................................2 1.1. Interface cables ................................3 1.2. Emergency pressure relief valve ..........................4 1.3. Specifications ................................4 Deployment considerations for optimal effectiveness ..........................5 2.1. Base Station distance from survey area ........................5 2.2. -
Page 3: Introduction
For example, they signal each reading and indicate excessive magnetic gradients caused by the presence of nearby magnetic sources. Sentinel2 presents its own Wi-Fi access point that any device with a browser can connect to and access the web-based user interface to monitor readings, configure settings and download collected data. -
Page 4: Interface Cables
Marine Magnetics Sentinel2 Base Station Magnetometer Operating manual Figure 1-2 – Sentinel2 bottom bulkhead features a wet mate connector, a sea ground lug and bright RGB LEDs. 1.1. Interface cables The waterproof wet-mate connector at the base of the Sentinel2 can be used for plugging in all available cables. -
Page 5: Emergency Pressure Relief Valve
1.2. Emergency pressure relief valve Sentinel2 is equipped with an emergency pressure relief valve, to provide a safe relief mechanism in the event of unexpected internal pressure build-up. Such pressure may be caused by the following highly unlikely (but nevertheless possible) circumstances: •... -
Page 6: Deployment Considerations For Optimal Effectiveness
Sentinel2 contains no magnetic materials to guarantee operation free of measurement errors. When deployed, it is imperative that only completely non-magnetic materials be used within several meters of the magnetometer, including the mooring hardware, shackles, ballast, and buoys. -
Page 7: Stationary Deployment
When deploying on lake bed or sea floor where overhead vessel traffic is expected, the Sentinel2 should be deployed to a depth of at least 20m to prevent registering small motor boats, or 50-100m when larger vessels may be present. - Page 8 Marine Magnetics Sentinel2 Base Station Magnetometer Operating manual Figure 2-1 - Mooring configurations for underwater deployment. "B" is recommended for most situations. "C" and "D" are for deep water deployment. A slack compensating mechanism is strongly recommended at the surface buoy to isolate the sentinel from surface wave energy.
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Page 9: Time Synchronization
Internet time. TIP: Try to get a good GPS time sync each time you use the Sentinel2 by selecting a location in an open area with a clear view of the sky to guarantee a good initial GPS signal fix. -
Page 10: Operating The Sentinel2
Notes: During the start-up sequence, the Sentinel2 attempts to get a GPS signal lock for up to 35 seconds, during which the LED flashes cyan. If unable to secure a GPS sync, Sentinel2 uses its internal clock to sync the magnetometer, and flashes yellow to indicate magnetometer sampling without synchronization. -
Page 11: Turning On / Off
3.2. Turning ON / OFF Sentinel2 is turned on by connecting the mag key (on/off dongle) to the mating connector on the base of the device. Take care to observe correct connector alignment and prevent any dirt or debris from getting into the connector. Do not insert the connector blindly to avoid pin misalignment and potential damage. -
Page 12: Web User Interface
Marine Magnetics Sentinel2 Base Station Magnetometer Operating manual 4. Web User Interface Sentinel2 provides full access to its settings and features via a web interface, by creating a Wi-Fi access point and allowing client devices to connect to it. 4.1. Connecting to the Sentinel2 Wi-Fi After Sentinel2 has been powered up and has completed its startup sequence, you can connect to its Wi-Fi network using the password provided with your Sentinel2. -
Page 13: Main Screen
4.2. Main screen The main screen of the Sentinel2 Web UI provides a general summary while focusing on the magnetometer data and status. The main view features a profile graph of recent magnetometer readings, with vertical and horizontal scale adjustments. -
Page 14: Time Synchronization Status
“Sentinel”– meaning the internal battery-powered clock in the Sentinel (least reliable unless recently synchronized). If you see “Sentinel”, while the GPS satellites are visible, try manually syncing the Sentinel2 to GPS through the Settings screen. See Sections 4.4 and 2.4 for details. -
Page 15: Gps Screen
Here you can check if the GPS NMEA data strings contain valid data (A) or empty data fields (B). The Sentinel2 GPS tracks two NMEA data strings: GPGGA and GPRMC, both of which begin with the current UTC time, and contain the key minimum GPS data. -
Page 16: Settings Screen
Operating manual 4.4. Settings screen The Settings screen of the Sentinel2 Web UI provides all the necessary configuration options for the key system components, including: Magnetometer sampling controls and LED settings, Magnetometer tuning parameters, Log and Profile graph settings, and time synchronization settings. -
Page 17: Logs Screen
4.5. Logs screen The Logs screen of the Sentinel2 Web UI provides a list of available data log files stored in the internal memory, and options for downloading those. Log file names begin with the log type identifier (e.g. Mag, Status or GPS), followed by date and additional daily count number. -
Page 18: Mag Terminal View
(e.g. BOB). When deploying the Sentinel2 on land, use the signal strength as an indication of how magnetically quiet your chosen location is. If you consistently get poor signal strength values (also indicated by purple LED flashes), while Auto-Tuning is enabled in Settings, your location may not be suitable for magnetometer deployment, and you should choose a different location. -
Page 19: Software Update Procedure
4.7. Software Update procedure Consider registering your Sentinel2 to receive email notifications about important updates: https://marinemagnetics.com/get-sentinel-software/ Sentinel2 Software Updates are released regularly and can be downloaded from the following URL: https://marinemagnetics.com/install/sentinel/default.htm To update software in the Sentinel2, follow these steps:... -
Page 20: Deployment Steps
11. If you are seeing yellow LED flashes, this indicates poor initial time synchronization. Try repositioning the Sentinel2 to get a better GPS signal fix, or set the magnetometer clock manually to a smartphone via the Settings screen. (See section 4.4 for details). -
Page 21: Underwater Deployment
11. If you are seeing yellow LED flashes, this indicates poor initial time synchronization. Try repositioning the Sentinel2 to get a better GPS signal fix, or set the magnetometer clock manually to a smartphone via the Settings screen. (See section 4.4 for details). -
Page 22: Troubleshooting
Auto-Tuning is enabled and date and time are synchronized. Please note that using the Sentinel2 indoors or in close proximity to buildings, large metal structures or electrical power lines will cause magnetic interference and prevent the magnetometer from getting good signal strength. This will be indicated by purple LED flashes during sampling, and by low signal strength values in the Mag Terminal screen. -
Page 23: Appendix A: Time Synchronization Details
When the magnetometer is powered up, its clock must be set by one of the other clocks. At startup, the Sentinel2 waits up to 30 seconds for the GPS to get a fix and then synchronizes its internal clock with the GPS first, then it synchronizes the magnetometer clock with the internal clock.
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