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Arc-Geo Pro Manual

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Questions?

How does the logger work? The Arc-Geo listens to the sound from the headphone jack and converts the sound to a number. The louder the sound the higher the number. This number is stored for the sample position on the grid. Then the grid data is downloaded to a computer for viewing.

Do you have to sweep the coil? No. The coil is moved in steps according to the grid sample size. The sample size should be the size of the detection area. For a 2-box you just walk and the logger samples with each step, which is about a yard. For small coils the size of the coil.

How is the grid setup? If you have a 12 x 12 wall in an old stone home and using a 12" coil, you would set the X, Y to a 12 x 12 grid. The logger handles all the X, Y values and lets you know which  sample position you are on within the grid as you log. The logger has a menu and is easy to use.

Can you tell where the target is on the plot? Yes! You can see the target position and know where it is by the X, Y position. The plot matches the grid you walked with the detector. You can also see the size of the target compared to other targets on the plot.

Can I use any detector? Any instrument that has a sound output can be used. I used my Minelab GP, Whites, Garrett, Deepstar, Fisher and Tesoro detector so far with no problems.

Can I join the grids together to get a big picture of my site? Yes! You can join the grid together and have a complete grid of the area showing all metal objects. If you use a GPS to mark the grid corners you can go back and walk up to the target you want to dig. to join the grids they have to be the same size.

Can I locate caves and graves? Yes! The Whites TM-808 and the Discovery TF-900 both have a cave mode that shows changes in ground conditions. Which includes cavities in the ground like graves, tunnels and vaults.  Another feature of the cave mode is small iron targets are not detected but non ferrous object like gold, silver and copper can still be detected!

How can the logger help me save time in the field? Most people search and dig when a signal is detected to see what that target is. If you have a very large area to search you can spending way to much time detecting and digging each target for days. But if you log that same area, you can look and see which target are the biggest and choose which ones to dig first. You can also return to that site and know where each target of interest is for future recovery. You can walk a 45 x 31 yard grid in 30 mins!

How deep can I detect a target? That depends on the detector you use. Dan detected a 9" pipe casing 12 feet deep using the TM-808 while doing the field test report on the logger. Canon balls, trash dumps and large battle field metals can be seen using the 2-box or a PI detector.

Does the sound output signal make a difference for the logger? Yes. It would be best for the sound to be a steady sound with a raise in sound level as the target is brought close to the coil. Most detector have this setting. A quick sharp beep should be avoided when possible. You want to use the setting that allows the sound to increase like the VCO setting or all metal mode. Most of the large detectors like PI and 2-box have this type of sound output.

Can I use the logger with a small detector/coil? Yes. But the logger was designed for large targets. You can use smaller detectors for house, cave and to grid a target to see better detail if the target is within the detectors depth range. If you want to try to find coins size targets with the logger in a large area, it can show coins, bullet casings, etc and it will take more time. The smaller the coil size, the higher resolution. But at the same time you can do more than one grid at different discrimination settings to see metal types. This is good when cave and house searching or evidence collecting at a crime scene.

Description and Uses:

The Arc-Geo Logger allows you to use a metal detector to log the sound output signal from the headphone jack. Then the data can be downloaded to a PC and displayed in a grid fashion to show all target locations within the plotted area. The software Snuffer is available free on the Internet. The software is used for ground resistivity and shows the data from the logger similar to a ground resistivity grid. This is a first for a metal detector owner to log data and have a hard copy of a site for later reference. The poor man’s GPR!

The Arc-Geo Logger was designed around the TF-900 detector by Discovery and can be used with many detectors on the market today! Here is a list of detectors that has been tested so far with the Arc-Geo Logger: Whites, Garrett, Tesoro, Deepstar PI and most any detector with a headphone connection! Sense the detector is the sensor part of the unit depth, discrimination and other settings only add to the ability of the logger. 

The logger has a very bright future. I have a few ideas for the use of the logger. One added use is a ground resistivity meter. I am testing a signal source for the resistivity meter now. Another is connecting a GPS to the logger via the serial port to log sampling positions. The ground resistivity generator would be purchased separately to complete the system. Free software updates are available under warranty. 

House Searching: Set the detector to ignore iron and see everything else. You will see the shape and size of the object and know the position in the wall. You can see if its rounded or boxed shape or maybe a vase shape. By holding a small metal target on the other side of the wall offset from the target you can see the relationship between the two in a 3d viewer!

Treasure Hunting: The TF-900 has a metal mode and a cave mode. I use the TF-900 for deep targets while ignoring small objects. You can grid a football size field in a very short time and then download the data back at home or in the field and see what's there. Then decide which target you what to check out first! Time is important when the sun is up and the day is hot, you can scan a number of sites and check out the data later. Compared to doing a ground resistivity grid on a 20 by 20 plot, you can grid the same plot in 20% of the time!

Utility Uses: Glenn a plumber is using the Arc-Geo Logger with an 18" coil to locate the main connections. Before I had to dig up the yard trying to locate the main connection. Now I just grid the yard and see where I have to dig. It says me allot of time.

Law Enforcement: The Arc-Geo logger along with a detector can be used to grid crime areas. Grids are already being done, so adding the logger will not be a problem. The added plot will show all bullet casings or weapons within the area. Also the plot can be overlaid with a photo to show target placement if needed in court. By using a GPS for the corners, the crime scene grid can be relocated again if needed.

LCD Display

You can see this same area done with the GCG and logged with the Arc-Geo logger here. Look at the bottom of the page.