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| # | Post Title | Result Info | Date | User | Forum |
| RE: Half Rigid Suspension Design | 2 Relevance | 1 year ago | Kevin Wiebe | Hardware | |
| @rzhang thank you. I’m not sure if I’m reading the CAD file correctly. Is it 27.288 inches between the front and rear eyelets for cable attachments? | |||||
| GPS Clock Options for the Geode/SCS | 2 Relevance | 2 years ago | Gretchen Schmauder | Software | |
| GPS Clocks, used in Continuous Recording systems to provide 1 pps signal to trigger seismograph. Also provides GPZDA serial string to stamp records with UTC for Continuous Recording and Self-Triggering systems. Includes cable set to connect clock to PC, seismograph, and 12V DC power. There are three GPS clock options for the Geode we sell. They are: GS-101B GPS clock from Orca, 1 pps accurate to within 100 ns of the precise time. Includes waterproof antenna with separate electronics module, with display of time and other indicators. Provides time base dur ... | |||||
| How difficult is it to manually tow the OhmMapper? | 2 Relevance | 2 years ago | Gretchen Schmauder | Application | |
| ... tow adaptor is required that will release the array in case a receiver cable is snagged on something in the tow path. A connector can be broken if it is snagged and towed by a vehicle but the tow adaptor is not required when it is manually towed because a person cannot exert enough force to break the connector under normal operating conditions. | |||||
| How do you collect 3-Component Geophone data with a Geode Seismograph? | 2 Relevance | 2 years ago | Gretchen Schmauder | Hardware | |
| Collecting 3-C data is no different than collecting 1-C data acquisition wise. You connect all three channels to the spread cable and proceed as normal. During post-processing you have to define which channels belong to which components. | |||||
| Why can't my computer connect to the MFAM Development Kit through Ethernet? | 2 Relevance | 2 years ago | Rui Zhang | Hardware | |
| ... to the default 192.168.2.2, especially if you have more than one Dev Kit. 3. Make sure the Ethernet version of the firmware is loaded in the Dev Kit, instead of the WIFI version. To check to see if the Ethernet version of the firmware is loaded, plug an Ethernet cable into the Dev Kit Ethernet port and the PC Ethernet connector. Look to see if the two Ethernet Status LEDs on the Dev Kit light up. If the Ethernet Version of the firmware is loaded both LEDs will be lit. If not, the WiFi version of the firmware is probably installed. Note that even if the Eth ... | |||||
| Cannot Connect to the MFAM Dev Kit through the Ethernet | 2 Relevance | 2 years ago | Gretchen Schmauder | Hardware | |
| ... one Dev Kit. - Make sure the Ethernet version of the firmware is loaded in the Dev Kit (Ethernet LED should be on), instead of the WIFI version. (To load different firmware, please refer to the instructions provided on the USB drive shipped with the Dev Kit). To check to see if the Ethernet version of the firmware is loaded (instead of the WiFi version), plug an Ethernet cable into the Dev Kit Ethernet Connector and into the PC Ethernet connector. Look to see if the two Ethernet Status LEDs on the Dev Kit light up. If the Ethernet Version of the firmware ... | |||||
| RE: Geometrics preliminary MagArrow and MagEx data processing program download | 0 Relevance | 1 year ago | Rui Zhang | Software | |
| ... cables, instead of 3m, to further reduce the drone interference. But this depends on your drone. 3. Compensation noise. The compass reading is very noisy. Part of it will enter the data after compensation. If you want to further reduce the noise, you can apply LPF at lower frequencies. For mineral explorations, I don't think you need 10Hz data. Regarding your other question, the coordinates in the sample file is NOT at the real survey site. We intentionally shifted the coordinates for privacy reasons. MagArrow is based on the scalar sensor tec ... | |||||
| Make MagArrow tow/suspension cables in different lengths | 0 Relevance | 1 year ago | Wei Jiang | Hardware | |
| Geometrics provides MagArrow tow/suspension cables with 10ft length. Customer can make their own tow/suspension cables in different lengths. See the attached zip file for instructions on how to make MagArrow tow/suspension cables. It contains a procedure, a Bill of Material, and some construction notes in a ReadMe.txt file. Attachment : MagArrow Tow cables.zip | |||||
| Good Practice - Charging the Atom | 0 Relevance | 1 year ago | Gretchen Schmauder | Hardware | |
| ... that some users use fitted cases for their Atoms to allow for safe shipping and handling between deployments. If the Atoms are fitted with charging cables and are being charged while inside the fitted cases, under certain circumstances, the fitted cases may not allow for sufficient air circulation and could lead to excessive temperatures inside the Atom unit. These excessive temperatures can exceed the battery manufacturers suggested safe charging temperature, resulting in some instances in out-gassing of hydrogen during the charging process. Recommendatio ... | |||||
| What is the recommended bending radius of MFAM sensor flex cables? | 0 Relevance | 2 years ago | Rui Zhang | Hardware | |
| One inch is the recommended radius limit for multiple bends. If you are looking for the bend-once and fix-in-place bend radius, it can be bended more. We have used ~ 0.5 inch before without breaking the connections inside. | |||||
| Half Rigid Suspension Design | 0 Relevance | 2 years ago | Rui Zhang | Hardware | |
| With the provided 10-feet suspension cables, the magnetic noise due to most commercial drones can be ignored. However, some MagArrow customers experience stability issue, especially in windy conditions. For a small number of drones, the MagArrow can be attached to the landing gear directly with acceptable noises (line-levelling is still required in data processing). For most drones, however, this configuration causes too much noise. A half rigid mounting design may solve this problem. It has 2 rigid bars with hinges on one side and 2 flexible cables on t ... | |||||
| Environmental seismic refraction survey considerations | 0 Relevance | 2 years ago | Gretchen Schmauder | General Seismograph Info | |
| ... in theory, although there may be obviously practical limits). Can I survey in the rain? Rain won’t hurt the seismographs. If you are using a StrataVisor or SmartSeis and it starts raining, they should be fine as long as they are kept vertical, with the screen pointing up. But acquiring data in the rain should be avoided, especially if there is lightning. Even in the absence of lightening, rain can be a significant source of noise, especially those raindrops striking the geophones directly. Obviously, the harder the rain, the more noise. If waiting the rain ... | |||||
| MagArrow Suspension System FAQ | 0 Relevance | 2 years ago | Gretchen Schmauder | Hardware | |
| ... cables to remove the magnetometer from the magnetic influence of the drone itself. Some customers have decided to build a fixed frame to mount the system but generally it isn’t large enough to remove the magnetometer from the drone’s magnetic effects so there will need to be advanced filtering to compensate the magnetic field readings. Either option is acceptable. | |||||
| Internal QA/QC Performance Testing for the Geode Seismograph | 0 Relevance | 2 years ago | Gretchen Schmauder | Hardware | |
| ... that can run line continuity and geophone tests. This can be accessed from the system->tests->Run Geophone/Line tests. Oscillator boards are typically installed during purchase. Fewer than 5% of the customers purchase that option, that level of QC is typically not necessary. For more information please read the test box manual. We no longer supply the Test Box to external customers. A description of how to run the tests if you use the test box or if you use the internal oscillators is described in Section 2.11.3.1 RUN INSTRUMENT TESTS (OPTIONAL ADD- ... | |||||
| What is the Detection Range of a Magnetometer? | 0 Relevance | 2 years ago | Gretchen Schmauder | General Magnetometer Info | |
| This is a very common question and for the best answer, please read page 45 of the Applications Manual for Portable Magnetometers. To give an idea, the rule of thumb is that 1 ton of steel will give 1nT at 100 ft. The distortion caused by the steel in the earth’s field falls off as the cube with distance and is linear with mass. Therefore, at 50 ft, 250 lbs will give 1nT, at 25 ft 30 lbs will give 1nT, at 12 ft 4 lbs will give 1nT. cables and pipelines fall off at somewhat a different rate (inverse square) so can be seen further for a given mass. | |||||
