Accurate Locators XL16 IMAGER User manual

Underground
Surveyor
Apparatus
XL16 IMAGER PRO SERIES
User’s Guide
Copyright © 2010 Accurate Locators Inc. All rights reserved.
Duplication of this manual is strictly prohibited in either print, electronic,
Or any other media without expressed written consent from Accurate Locators Inc.
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Table of Contents
Introduction 4-6
Existing Potential Method (USA) 7-8
•What EM Measures
•MagneticSurveying
•Principles of Magnetics
Packaging Contents 9
QuickStartGuide 10-11
Ground Balance Technique 12
GridPatternScan 13-14
Connecting Control Unit 15
Software Introduction 16-24
•Basic Software Functions
Software Keyboard Shortcuts 25
Analysis of Scanned Data 26-28
2-D Measurement Mode 29
High's and Low's Signal Identifying 30
Nulling a High Signal 31
Tunnels and Void Locating 32-33
SearchinganArea 34
Double-X-ing Your Target 35
Determining Approximate Depth Point 36-37
Determining Size of Target 38
Examples of Targets 39-40
Introduction to Geovision Sensor 41-42
XLUSAGeoPinPointer 43
Scanning Methods 44-47
CommonErrors 48
TroubleShooting 49
Un-Exploded Ordnances 50-51
Alternative Power Supply 52-54
Resetting Window's IP address 55-64
Unit Technical Specifications 65
TrainingLocations 66
Certificate of Performance 67
WarrantyInformation 68

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Introduction
Thank you for your purchase of the XL16 IMAGER PRO SERIES (USA). Before
operating the unit, please read this manual thoroughly and retain manual for future reference.
With the XL16 IMAGER, you will be able to locate anomalies, buried objects and faults.
The XL16 IMAGER works on the principle of detecting electromagnetic field changes that
are emitted from the Earth.
With the XL16 IMAGER, there is no need to transmit a signal into the earth, because of the
existing signals that are already present in the earth. The XL16 IMAGER has very sensitive
broadband receivers, enabling it to receive electromagnetic and magnetic signals. When
there is an item buried in the ground, a FERF (Free Electron Radiation Field) is created
enabling the receiving antennas in the XL16 IMAGER to identify its presence. When a hole
is dug, it creates a scar on the Earth’s surface; this scar is visible to the XL16 IMAGER.
Unlike any other detector ever built, it is looking for the difference, which enables the
operator to locate anomalies.
The software that was created exclusively for the USA systems and is designed to highlight
items in the ground, anomalies, disturbances, etc… You can see subsurface objects in Real-
Time with the GeoSurveyor 3-D Software. Also a feature that assists in detecting a target
area is Auto Ground Balancing. Auto Ground Balancing defines the compensation for the
varying amount of minerals in the soil by sensing the mineralization and automatically
adjusting the ground balance to achieve the best performance, thus producing a more
“clearly defined target area”. One of the main items to note is to do a large enough scan
allowing you to see the background. When scanning in only one small area, determining the
difference between the target and the background can be somewhat difficult. Another note to
remember is to isolate suspected targets so that there is only one target per scan. This way
you will be able to determine the approximate size of the object. As advancements in the
software are available you may purchase upgrades, critical updates will be available free of
charge. Please contact your sales representative for more information.
It is very important to read this manual through completely. If there are problems, our
technical support staff will be able to assist you in the better understanding of the unit and its
functionality. Our technicians will assist you in proper technique of scan and operation of
the unit. Personalized training courses are also available at Accurate Locators in Oregon,
USA. We have a dedicated test facility with buried objects of both Ferrous and Non-Ferrous
metals. The training requires and entire afternoon and is by appointment only. Please contact
your sales representative for more information on obtaining premium technical support
services and personalized training for your unit. Of course, every unit comes with one (1)
hour of free telephone technical support. A free product demonstration, not to exceed two (2)
hours can be scheduled at the Accurate Locators, or Imaging Locators test sites.

SCREEN SHOT OF THE XL16 IMAGER PRO IN ACTION
You are seeing a screen shot from the new XL-16 IMAGER USA Pro Series.
We have enhanced the imaging 16x times the average with increased data
speed; producing higher resolution and more accurate detection of targets.
With new features giving you greater control over your scanned image.
¾Adjusts visuals of scan relative to original ground balance point 0.0
Visual color scales also in black and white.
¾GPS interface features: Export Map Points, Export Map scans, Longitude/ Latitude coordinates,
also Dilution of Precision data for precision of signal received.
¾Project Mode to keep track of your scans while in the field.
¾Enhanced saving features to better track your project scans.
¾Added smooth mode to increase accuracy of target shape.
¾Decreased scan lag to increase amount of scans during mobile scanning at higher speed.
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The XL16 IMAGER Pro has a special export function for Google Earth maps. Inside the XL-16
IMAGER Pro software scans can be exported to Google maps as a ground overlay (KML). It
converts the scan either to an image with GPS references or remaps the entire scan point by
point into Google Earth. Mapping the target area or an entire site or claim has never been easier.
As fast as you can select it from the menu, the Google Earth file (KML) is saved into a special
directory then can be double clicked or imported from there for use later. Archaeologists, as
well as treasure hunters could find this very useful as it can show a multitude of underground
areas simultaneously and then show where these areas are in Google Earth for later excavation
and discovery.
An improved interface allows for multiple target analysis color options beyond just augmenting
relatively weak or strong targets. This allows you to set the colors to what you need and allows
you to see targets with the most resolution to distinguish a weak target from mineralization with
ease.
The XL-16 IMAGER Pro can detect PVC pipe alongside ferrous pipe with greatly improved
detail. A metal water pipe is denoted by the yellow-orange line and the dark blue furrows to the
right and left of that pipe are PVC pipes in Leech Fields. The Dominator has integrated GPS so
that surveys can be easily mapped and cataloged. The GPS Coordinates can be displayed in a
data window, but are also logged in the scan file, where they can be retrieved and reviewed
later.
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Existing Potential Method (USA)
When using specifically designed sensors the earth’s self-potential of direct currents can be
measured. The sensors become very useful when using a single forward motion just above,
without contacting, the earth. With this rather simple technique, the geophysicist can trace
zones of mineralization, having a strong signal, or tunnels having a weak signal. By receiving a
combination of AC/DC and frequency to map potentials, we can map fields of interest. These
rapid changing signals are amplified and analyzed by the software. The XL16 IMAGER allows
for the rapid collection and interpretation of large quantities of data, making it a cost effective
technique. EM equipment measures the background of the emitted signals from the earth; it
then detects any differences that are present. Differences can be caused by anything in the
subsurface that has disturbed the earth (like a void, metal objects, fault, tunnels, etc…). Other
available geophysical techniques that are sensitive to the presence of both ferrous and non-
ferrous metal objects include metal detectors, pulse induction, resistivity, ground penetrating
radar, etc…
What EM Measures
EM measures the apparent electromagnetic field of the ground, including effects of the soil,
bedrock fractures, contaminants, metal objects, and ground water. Variations in the
electromagnetic field may indicate changes in composition, layer thickness, or moisture content.
The presence of buried metal such as drums, and/or other objects create a large variation. The
UNDERGROUND SURVEYOR is specifically designed to detect subsurface anomalies by
receiving varying signals from the ground.
Magnetic Surveying
Magnetic surveying is ideal for both reconnaissance and focused surveys. It is expedient and
cost effective, covers more ground in less time, and requires a minimum of field support. The
portability of the instruments makes magnetic surveying well suited to sites with topographic
variations.
What Magnetic Measures
Magnetic surveys measure the earth's magnetic field and the Milligass level very accurately.
Buried ferrous materials, and in some cases, changes in bedrock lithology, produce disturbances
in the local magnetic field that can be readily detected by magnetic surveys. The
UNDERGROUND SURVEYOR instrument is one such device that takes measurements in
order to find anomalies that lie beneath the surface. Instruments like the “Discriminator”, uses
“Pulse Induction” to measure conductivity and in combination with a Magnetometer to
discriminate ferrous and to see non-ferrous objects.

Principles of Magnetics
The earth’s geomagnetic field has three principal components: the main field itself, an external field and local
perturbations superimposed on the main field. Caused by processes in the interior of the earth, the main field has a
large magnitude which varies slowly over time. At present, the earth’s field amplitude (T) ranges from a low of
about 25,000 nanoTeslas (formerly gamma) (nT) near the geomagnetic equator to almost 70,000nT at the
geomagnetic poles. The field inclination is horizontal at the equator and vertical at the poles. The external field
originates outside the earth’s crust and is associated mainly with electric currents in the ionized layers of the outer
atmosphere because of interaction with the solar winds. Traveling along magnetic flux lines solar winds are ionized
plasma or hot-charged particles, which transmit energy by wave motion. Local variation in the rock and mineral
assemblage of the near-surface crust produce local perturbations that are the anomalies of exploration interest.
The earth’s magnetic field (a vector field having both amplitude and direction) is described by an intensity (total
field intensity, T), an inclination (I) and a declination (D), Figure 1.1. For Specific applications, horizontal and
vertical field components can be derived from T, D. and I
Rock units in the crust acquire a magnetization in the direction of the earth’s field, which is referred to as induced
magnetization or magnetic polarization. The resulting induced field of a typical finite source body is dipolar: that
is, it contains positive and negative elements. In the middle-to-high magnetic latitudes of the Northern Hemisphere,
the dipolar nature of an induced anomaly is typified by a positive (high) and related, but subdued, negative (low)
on its north side. Anomalies of interest range in amplitude from a few nano Teslas (nT) for deep basement or
sedimentary anomalies to 1,000’s of nT for near-surface mafic rocks or iron formation to 10,000’s nT for magnetite
iron ore deposits. Several time-variant or temporal variations occur in the geomagnetic ambient field. A long
period, or secular change, occurs slowly over many decades or centuries and modifies inclination, declination and
intensity. Such a change can be observed as a change in the magnetic declination as noted on old maps when
compared to today’s version. A complete reversal of the total field direction, occurring over tens-to-hundreds of
thousands of years, is a more dramatic effect of the secular change. More important to prospecting are the diurnal
variations. A diurnal variation of 10 – 100+ nT occurs regularly on a daily basis, (Breiner, 1973). This diurnal is
also related to solar winds, the small effects of which vary with the level of the ionosphere and intensity of solar
winds. Micro pulsations of 0.001 to 10s nT are random effects lasting from 0.02 to tens of minutes. Magnetic storms
also produce a short period random “noise” which may vary up to many 100s nT over periods of a few minutes to
hours. Storm effects are unpredictable but are related to and follow solar flaring, commencing abruptly and
decreasing slowly over hours or days.
Principles of Magnetics are an excerpt from:
Practical Geophysics II for the Exploration Geologist
© 1992 Northwest Mining Association
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ISBN: 0-931986-05-2

PACKAGING CONTENT
2- Antenna sizes: 24” & 36” 1- Thumb Drive with 3D & Pin Pointer
1- 3D Geovision Pin Pointer 2- Detailed instruction manuals
2- Adjustable Handles 1- Accurate Locators Hat w/ light
1- Antenna case 1- 3 year warranty information
1- Field pack (fully assembled) 1- Tech support information
4- 18v 3000m Batteries 1- Wiring harness
1- 18v charger 1- Wireless adapter
2- 1- 12v 6000m Lap top back up battery 1- Wireless Manual
1- 400watt inverter with multi- adapters 1- GPS setup Manual
1- Pelican weather protective carry case 2- Cross over cables
1- XL16 Imager control unit
1- Panasonic Tough-book w/ GPS Fully configured
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Unit Operation “Quick Start Guide” For XL-16 Imager and Geovision EM detectors
The following is a “Quick Start Guide” to getting the unit up and running for the first time.
There are two different methods that will be explained here in detail. Please remember the
importance of the “Grid Pattern” (See page 10 & 11 for details) in order to achieve better data
and make analysis easier.
Normal Grid
1. Make sure that batteries are fully charged (not more than 3 hours for the XL16 IMAGER
battery) for both the Laptop computer and the XL16 IMAGER.
2. Ensure that the laptop and the control unit are properly in the Front/Backpack.
3. Put pack on over shoulders and secure the side belts so the pack will not slide and so that the
pack is balanced.
4. Turn on the power to the XL16 IMAGER.
5. Turn on the power to the laptop.
6. Once the laptop has started select the “XL16 IMAGER or Geovision” software.
7. After the software is running click on “File” then click on “New”. You can also use the
keyboard shortcut by holding down the “Ctrl” and “N” keys.
8. The “New Scan Setup Wizard” will appear, click on the “Next” button.
9. In the next dialog box are your options, select the amount of time, in seconds, that it will take
you to cover one survey line (Figure 4.1a). You can either click on the up and down arrows
located next to the actual second count. For instance five seconds, or you can click on the
“More” or “Less” buttons on the right hand side of the dialog box. Next you can select the
Dominator option of “Live Mode” to view data in real time mode by clicking on the “Live
Mode” button.
10. After selecting the amount of time, click on the “Next” button. Be sure to have your antenna
oriented and on the ground ready to detect.
11. The next dialog box (Figure4.2) is for comments about the scan that is going to be taken.
Comments that are typically entered include weather, soil condition, adverse terrain, location of
scan, etc... Once completed with the comments, which of course, can be entered after
completing the scan as well, click on the “Next” button.
12. A small dialog box will open in the top left hand corner waiting to establish a connection.
At this time the sensors will “Ground Balance” allowing a more “easy to read” evaluation of the
scanned data for target identification. Once the connection is established, you will be able to
click the “Go/Pause" button or the “Quit” button.
13. Before you click on the “Go” button, align yourself with the desired path of the survey line.
Set the mouse over the “Go” button and be prepared to click it. Click on the “Go" button and
immediately begin your survey line.
14. The timer will automatically stop after the preset amount of time. You can repeat this row
process by back tracking to your original start point and indexing to the right exactly the full
with of the antenna (for most accurate row scans) Press go once more and start walking to
execute another row scan. For a more detailed instruction about the “Grid Pattern”, please see
the section called “Grid Pattern”. Follow the same routine as in #13.
15. When completed click on the “Quit” button, and save data.

Important Note: Make sure to have your antenna on the ground and pointed in the direction of
the row when you are at the Comments screen do not pick the antenna up until it says
connection established
(fig.4.1a)
(Fig. 4.2)
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GROUND BALANCE PROCEDURES
Before starting a new scan it is recommended to check your readings from your ground balance location
Fig. 1 Fig. 2 Fig. 3 Fig. 5
1. Magnetic North to South is your recommended direction of scan within the Northern Hemisphere. It will be the exact opposite if
scanning within the Southern Hemisphere. (Fig. 1)
2. First lift your antenna off the ground a minimum of 2". Normal setup of a new scan. Open software, click on File<New<set time for
scan at 2 seconds<name scan file or leave default<make sure at this time your antenna is pointing in the direction you wish to
scan<press ok at this time and allow system to self ground balance. (Refer to picture Fig. 2 above for direction)
3. After ground balance is executed you will need to do a minimum scan (2 seconds). Walking slowly until your 2 second scan has
completed. It is not necessary to pay attention to what displays. You are only doing the scan to have a reading from your ground
balance point.
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4. At this point you will want to click quit. You will not be doing anymore scanning at this point. Click on View at the top of your
software screen and then click on the show data under cross hairs tab. Another window (Locational Data) will pop open with data that
we will use to determine your ground balance point. You will want to use the data from the Data value Line. Your goal is to obtain
the lowest ground balance number you can. Closest to 0. A recommended scan is nothing stronger or weaker than +/- 100. You can
see by the data value picture we are at -4. That is a good ground balance point which will help us to see weaker targets such as natural
veins, weak pay streaks or even sub surface anomalies.
Fig. 6
Seconds
5. You will need to make your exact ground balance point for your scan in the middle of your initial 2 second verification scan, this is
the optimal spot. Refer to Fig.6
6. Your ground balance is not complete just yet. You still need to maintain the orientation and direction that you ground balanced in.
(Refer to Fig. 3-4) If you ground balance heading West you must maintain that direction during your scans. It is the same if you do
multiple rows with the same scan. You must maintain the same direction with the antenna at all times.

Grid Pattern
Let us create a Grid, in this example (Figure 4.3) we will go 14 second long reading on the
survey line by 6 Survey lines wide. The grid pattern would look like the one below. Typical
scans are a minimum of four or more survey lines. The larger your scan, the more background
will be available to find your target. The length in between the pulses is only relevant to the
previous reading. For example, if the distance between the first and second reading was 4 ft.
(100cm) then each reading, including the turn should be 4 ft. (100cm) away from one another,
this scan is commonly referred to as a rough scan. If the distance between the first and second
reading was next to the last row, then this scan is typically referred to as a Fine Scan. *Tip
Raise sensor at least 1 Foot from ground to find larger targets faster with minimum filtering.
The SENSOR MUST ALWAYS FACE THE SAME DIRECTION , unless in “Live Mode”
In that case, you must pause the sensors from receiving data in order to change directions in
“Live Mode” by pressing the space bar or the left mouse button the arrow on “pause”. Continue
by clicking “go” or by pressing the spacebar once more to continue scanning in “Live Mode”
Each time you complete this action, the sensors will once again “Ground Balance” This is
relevant if it is going up a survey line or down a survey line. (See Figure 4.3a) Rotating the
sensor itself will cause erroneous readings and the data collected will most likely be unusable.
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A typically scanned area would be like the image above. Always moving to the Right of the first survey
line and working in the same direction to the last survey line. In addition, since this is an Electromagnetic
instrument it is very important to know where magnetic North is. It is best to bring a compass to set
magnetic declination for your area. In the Northern Hemisphere, it is always best to start from the South,
go towards the North on the first survey line, in the Southern Hemisphere start from the North, and go
towards the South. Although scans in the East/West direction also work, just not as well as the
North/South directional scans (refer to page(s) 5-6 for further information) Remember that a fine scan
and a rough scan are performed using the same Grid Pattern. Any variance from the grid pattern will
result in an inaccurate reading, most likely producing erroneous results and leading to extra work in the
field. If an object, like a tree, is blocking a survey line then shorten your grid to accommodate for the
tree. In the event that you need to walk around a tree, “Live Mode” is a great approach to the target
identification.

Importance of the Grid Pattern
The grid performed is ninety percent of the work. If your grid does not align correctly then the
scan that appears on the laptop may not be correct. An example of the grid pattern importance is
shown below.
In the example to the left
(Figure 4.4) is a filtered view of an actual
target. When the grid pattern is properly
conducted, the image will show a definite
man made anomaly very clearly.
In the example to the left (Figure
4.5) is a filtered view of an actual target.
When the grid patters are NOT properly
conducted the target is not so easily
identified. The image that you see to the
left is common of mineralization, which
can be quickly overlooked.
In the two examples above, one can clearly see the difference. When training with the unit, it
is always helpful that a second person watch the operator to ensure that the unit not be
rotated at the end of the turn and that the operator is walking a straight line. The operators
pace determine the distance of each scan and time set in the software.
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Connecting the XL-16 Imager Pro Control Unit
On the face of the Control Unit, several ports can be connected. *The XL-16 Imager does
Not utilize all of the port connections.
1
2
3
Wireless adapter
1. Connect Antenna to the Imaging Port (Com2)
2. Connect the Power connector
3. Plug in the RJ-45 into the ETHERNET port
4. USB for wireless connection device(s).
*Presently the Control Units do not use COM1, COM3.
Your XL-16 Imager package Field pack will be fully assembled tested and your Lap Top will be fully
configured. You are able to use your equipment immediately out of the box. It is highly recommended
that you take at least a few weeks and practice with your USA series detector for best technique and
detection results. Always check the above connections show in the picture before you turn on your
control unit. This will help avoid any operating issues. *Note some minimal assembly will be required.*
VERY IMPORTANT:
DO NOT DISCONNECT / CONNECT ANY OF THE CABLES WITH POWER CONNECTED
FAILURE TO DO SO CAN CAUSE DAMAGE TO INTERNAL CIRCUITRY AND VOID
WARRANTY.
SAFETY PRECAUTION
Do not let end of battery connection hit metal
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Software Introduction
The software has been designed for both the hobbyist as well as the professional.
For a better understanding of the software and the functionality that has been built
in, the following pages will give a detailed breakdown of all the menu functions and
quick control features.
In the development of the software, the goal was to create total functionality that
completely frees the user of actually having to set any controls on the unit itself.
This way everything is controlled from the software directly rather than having to
handle two separate pieces of equipment. Though the functionality of the software
is very easy to understand, it is imperative that the proper grid pattern be completed.
Ninety percent of the work with the XL16 IMAGER is the proper completion of the
grid pattern. Afterwards, the software and target identification are quite simple.
There are many different techniques for taking the actual scan. When the scans are
complete, the data must be analyzed to locate the target. We will go over many
scans and show examples of anomalies and buried targets that are in our training
area. Unit training is available at our test area where we have several buried items.
Our training area designs are similar to many real life conditions for buried targets.
2 Hour training courses are offered by appointment only. Please contact a sales
representative for exact details and pricing.
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SCREEN BREAK DOWN
TOP BAR
SIDE BAR
STATUS BAR
Top Menu Bar
This menu provides full software functionality and quick views.
Side Menu Bar
The Side Bar contains many of the features
Status Bar In the Status Bar information of the Crosshair Point and the name of the
file that is open is displayed at all times
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Top Menu Bar
File –
This file has the following options and links to the keyboard
shortcuts. In here, you can begin a new scan, open a saved
scan, save a scan, or save a scan as a different type of file or
name, Export Map Points for topo mapping, Export Map
scan for visual over topo mapping export a scan, print a
scan, or quit the program. Where you see writing like
"Ctrl+N" means a keyboard shortcut. By holding down the
control “Ctrl” key and the letter “N” at the same time will
start a new scan.
Edit – This menu will allow you to change the values in a
given area on a scan. Occasionally there will be an
extremely high or low signal. Using the “Copy” and “Paste”
functions, you can alter your scan to make it easier to
understand.
View – This menu is the most important menu to learn.
With this menu, you will be able to set the views necessary
to identify the anomalies. You can also see a partial View
Menu by Right Clicking on the screen.
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Toolbars – This function sets which toolbars the user
wants to see at the top of the menu.
User Defined Rotations – Shows/Hides the toolbar.
Pre-Defined Rotations – Shows/Hides the toolbar.
Wire frame Mode – This changes the view from a
solid to a wire frame.
Add/Remove Guides – This function will Hide/Show
the side and bottom guides that are in a scan. Users
when in “Wire frame Mode” commonly remove these.
Show Data under Crosshairs – This function is done
by moving the cross hairs over a desired point and
then when selected it will display in the image to the
left.
Data Coordinates – gives the position of the
crosshairs on the screen,
X, Y and Z Rotation – gives the rotation of the scan
in degrees of variance from the original position.
Latitude/Longitude – coordinates provided in this
section are based on GPS data received.
Depth of Point – software calculates approximate
depth only. Depths will vary in different soil dielectric
constants (soil types), i.e. weather, temperature, solar
conditions, etc…Measured in FEET. Note: select
reset display if you’re using Change Perspective.
Data Value – gives the data value at the specific
coordinate. The value can be changed by using the
crosshairs to highlight a point on the image to
determine the value. The value is derived from the
difference between the ground balance location and
the current coordinates reading.
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Highlight Strongest Points – will show the strongest signal
values that were recorded during the scan.
Highlight Weakest Points – will show the weakest signal values
that were recorded during the scan.
2 Color Mode – is a preset filter to highlight the strongest
recorded signals in a scan with less change from smaller
signals.
2D Measurement Mode – a very useful tool to highlight areas
of a scan. Please see details on 2D Measurement Mode on page
25
Show Comments – allows you to view or change comments
regarding the scan. Typical comments made are GPS
coordinates, markers, distance of survey line, etc…
Change Perspective – changes the view so that all of the upper
objects will appear on the bottom and vice versa. This is
extremely helpful to identify certain anomalies and areas
previously excavated. Also useful in determining approximate
depth.
Detail Mode – put the scan into a very fine detail mode. Each
point is represented by a single color.
Display All Probable Targets – is a preset filter that uses
automatic highlighting of areas that show a significant
difference.
Reset Display – changes all setting and returns the scan to all
original colors and rotations.
Define Rotations - Enables the user to pre-program views and
angles of scans for easier recognition of targets. To set the
“User Defined Views” first put the scan in the view that you
would like have as a preset then click on the “View” button
then scroll down the list to “Define Rotations” then click on
the desired View to set the view. You can change any of the
“User Defined” views by repeating the above procedure.
Help – This menu (Figure 3.7) allows you to view the basic
Manual and to see the exact software release as stated in
The “About GeoSurveyor” option. For a detailed electronic
manual please insert thumb drive and click the manual option
on the splash page.
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