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The cesium used in our magnetometers is the non-radioactive elemental metal, isotope Cs 133. We employ approximately 120 to 240 micrograms of cesium metal in the sensor divided between the lamp and absorption cell. These are small glass ampules, each containing a volume of 1/32 to 1/16 of a cubic millimeter of cesium. If either or both the lamp and cell should break the cesium will instantaneously react with the air and moisture in the air to become Cs2O and/or CsOH. Both compounds are caustic but the quantity is so small that it is of no health concern. Finally, the lamp and the cell ampules are contained in a G10 housing that is then contained inside a sealed PVC housing. If the sensor should cease working due to a broken lamp and/or cell, it is not field repairable. Return the sensor to Geometrics for repair, replacement and/or disposal.

If the system has a large amount of survey data, it may affect the data transfer rate. Sometimes a very slow SD card makes the system unresponsive; to the user this can look like a slow/bad network connection. Therefore, it might be useful to clean up the SD card and USB drive. Delete the Geometrics.log file on the USB drive. Clean up the survey data on the SD card: First, make sure that you have all the data that you need off of the SD card. Either download all survey data that you want to keep, or copy all of the contents of the SD card to another drive (perhaps to a PC). Delete all of the data on the SD card, doing one of the following: Use the UI to delete all of the surveys, then use the "Clean old files" button on the Admin page to empty the recycle bin on the SD card. This can be VERY slow, and because the MagArrow has a very simple web interface, the user will get no useful feedback. On a very full SD card, this process might take 30 minutes or so. Or.... Remove the SD card from the MagArrow and after copying any data that the user still hasn't saved to a PC, format it or delete everything on it, then re-insert it. Be careful not to lose the SD card or to let it Drop into the inaccessible spaces in the instrument. If you format the SD card, the ExFAT format is preferable. If the customer can't get the data downloaded from the instrument (takes too long or stops), the data can be imported into a survey in Survey Manager, directly from the SD card (or from the PC hard drive to which the SD card data has been copied). Then the SD card can be cleaned up or formatted. With the new version of Survey Manager (you need to update that also, not just the instrument software), the user can import a large survey, including all of the files in subdirectories, by selecting the "acquinfo.txt" file in the root directory of the survey, from the SD card. More details about how to import/export SD card files using Survey Manager can be found in the post below: SD card files conversion

Key components include: Seismograph (Geode Seismograph) 12V Battery PC (required for Geode and ES-3000) Digital cables (Geode and ES-3000) Geophones (including spares) Geophone cable(s) Source (hammer, weight Drop, explosives) Striker plate (if using hammer) Hammer switch and spare Trigger extension cable Measuring tape Hand level Hearing protection (IMPORTANT)

In general, two people can get the job done. If you are using explosives or a weight Drop, a third person may be required.

Detailed instructions for changing the operating mode of the SuperMag(LCS100S) MFAM through the SPI can be found in the Module User Guide, located in the USB drive shipped with the product. The operating mode can be changed through the MagViewMFAM software (software installation is also in the USB drive). Use the MagViewMFAM to connect to the MFAM. After startup, the "Run Mode" indicates the current operating modes. To change the operating modes, choose "Run Mode" in the "Command Menu" and then select a different mode in the Drop-down menu. Click "Send Command" button to change to the selected mode. To set the current modes as the default startup operating modes, select "Save Settings" and click "Send Command". Power cycle and make sure that the default startup operating modes have been saved.