Troubleshooting Geonics EM-31 EM-38 EM-34 and EM-61
is often a straight forward process. The number one problem, which can be checked by an operator, are batteries. Though Geonics instruments use little power, poor battery contact and low power are often the problem to check first, second, and third. Battery contact is deceiving. More than once an operator has reseated, wiggled, moved, poked, and prodded the batteries without fixing the problem. That is because, in my opinion and to give Geonics credit, the battery holders are designed to keep the batteries in place under adverse field conditions. Translation, it is not always easy to install them. Once the batteries are properly seated, the equipment works fine. Like most major battery manufactures DuraCell offers good information about battery care at their website.
Another common mistake, which users who are using more than one type of Geonics geophysical instrument, is to swap data logger cables. Cables used to connect each type of geophysical instrument to a data logger are different for each instrument. This means that a data logger cable for a Geonics EM-31 will not work with a Geonics EM-38. The cables should be labeled so an operator can quickly confirm if they have the correct hardware.
Troubleshooting Geonics Instruments Links
At these linked pages, common problems are addressed and additional links are provided to lessons about the use of the geophysical equipment.
Follow this link to find more information about troubleshooting Geonics EM-38
Follow this link to find more information about troubleshooting Geonics EM-31
Follow this link to find more information about troubleshooting Geonics EM-61
Follow this link to find more information about troubleshooting Geonics EM-34
Interfacing GPS systems is covered in the lessons on how to setup and acquire GPS data. It is not part of this troubleshooting Geonics page. The accuracy and repeatability of uncorrected and differential GPS varies between manufactures and is not a function of the Geonics instrument. Many times, the GPS units need to have their settings changed for the NMEA variables/strings, required for post processing, to be sent to the data logger.