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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.
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