Search result for:  id10=WA 0821 1305 0400 Vendor Sewa XRF Gold Tester Thermo Pandeglang Banten [[Tiga Pillar]]

There are basically three types of "gold": low concentration disseminated Gold in ore, placer Gold deposits and solid Gold such as that associated with treasure. Magnetometers are used to find disseminated Gold by its association with mineralized zones which also contain magnetite or other magnetic minerals. Magnetometers are often used in conjunction with airborne electromagnetic surveys to find the conductive ore bodies. Placer Gold is the type found in buried stream channels such as the Gold which sparked the California Gold-rush in 1849. Gold dust and magnetic minerals have been concentrated in river banks over thousands of years. Where there is Gold there is often magnetite and therefore the magnetometer can be used to locate placer Gold deposits. Gold treasure is a different story and being non-magnetic Gold, silver, and other precious minerals are not directly detectable by the magnetometer. The magnetometer can only detect ferrous (iron or steel) objects. If the Gold is stored in an iron box or has iron materials next to the Gold (such as colonial ship ballast stones in the marine environment), there is the possibility of detecting the iron material. This is true for land and marine (sunken galleon) Gold bullion. The vast majority of target search surveys are performed on a grid in a "lawn mower" back and forth manner to cover the area of interest. Lane spacing is dependent on target size (magnetic mass). At a sensor to target distance of 2 to 3 meters there will need to be at least 1-2 kilograms of iron. This can produce a 1-2 nT anomaly that is detectable in a magnetically clean environment. The ideal environment would be in a plowed farm field or the bottom of the ocean away from human activity i.e., away from a port or harbor. You will probably not be able to detect this small of an anomaly in a city or port location. The more iron mass there is, the better the chance of detecting it. Training to use the magnetometer can take 1-2 days depending on experience with setting up computerized survey equipment and a GPS. Processing the magnetic data requires several days of training and would require a geophysical background to interpret the final maps. We provide free software to make maps and estimate the target depth of burial (inversion). If you are unfamiliar with this procedure, we would recommend that you find a local geotechnical firm to look at the data to determine if there are anomalies that should be investigated further. Remembering that non-ferrous materials do not cause anomalies (gold, silver, copper, brass, aluminum, gems) you will be looking for anomalies either associated with the container OR associated with ground disturbance (i.e., gravesite). In this way some anomalies can be detected where there has been an excavation such as a gravesite. In order to understand the process more fully, we strongly suggest that you download and read the Applications Manual for Portable Magnetometers. Other additional resources are available. Understanding how the magnetometer functions and how the earth’s field responds to distortions due to ferrous materials will help you make good decisions about how to interpret and use the data to direct recovery or exploration efforts.

The hammer switch (trigger switch) that Geometrics seismographs use is a contact closure device that utilizes inertia force to create a momentary closure between the center rod and cylinder located in the enclosed device. The delay from strike to closure can vary based on orientation. The black dot on the switch and instructions were added to assist having a repeatable strike to closure time from usage to usage. However, this is only true for one hammer switch. From one hammer switch to the next there could be a variance however very slight indeed. In SCS there is a setting which lets the user change the sensitivity of the hammer switch to accommodate the natural variance in the trigger switches. To build the switch, we use a tool to center the spring beam in the tube contact, which minimizes the variance in the triggering of the hammer switch between different orientations and natural variations in different hammer switches. Any strike to closure time variance is more affected by the energy of the strike and the momentum produced on the hammer switch. The usage of the black dot to orient the hammer switch for most cases is probably extraneous. We center the beam accurately and suggest the usage of the black spot for mounting repeatability. We left it just to ensure any slight difference due to orientation could be eliminated. Additionally, both the tube and spring beam are Gold plated to reduce and maintain contact resistance. After all this, it depends upon the repeatability of the user’s apparatus.

Attachment : MagMap_W11.pdf It has been reported that the MagMap software does not work with some versions of Windows 11. The following error is shown: C:\Program Files (x86)\MagMap\olch3d32.dll is not intended for use with Windows or contains an error. Try reinstalling the program from the original installation media or contact your system administrator or software Vendor. Error Status: 0xc000000d Solution: There's a setting in the Windows Security that needs to be changed. See attached.