Whites XLT User Manual download pdf (Page 9)

Chapter 3 XLT

Quick Start

Search Fundamentals

The loop/search coil must be in motion (sweep-

ing from side-to-side) for this instrument to

respond to metal. Practice a smooth sweep of the

loop from side-to-side keeping the loop close to the

ground throughout the swing. Each pass of the

loop should take approximately two seconds

from right to left, two seconds to return from left

to right.

Walk forward slowly. Take small steps no greater

than half normal strides. Make sure each pass of the

loop overlaps the last by at least half the length of

the loop. Do not lift the loop at the end of each

swing. Keep it close to the ground at all times.

To become comfortable with sweeping the loop

takes some practice. Try to loosen up and find a

comfortable grip on the handle. Premature fatigue

may result from gripping the handle too tightly,

improperly adjusted rod or elbow support, and

limited body movement. Hold the handle loosely.

Adjust the rod and elbow support for comfort and

keep the elbow strap loose. Use your arm, shoulder

and even your back a little to allow a smooth even

sweep of the loop.

Now that you're sweeping the loop smoothly over the

ground, you will notice that the detector starts making

sounds (beeps). Not all sounds are good targets;

some trash targets also make the detector beep.

As the loop is swept over the ground, ignore the

display and concentrate on the sounds the detector

makes.

As the loop is passed over metal that is likely trash,

the sound will be inconsistent. Trash targets typi-

cally produce a shorter, sputter-type sound, that is

often broken or double in nature. Place a steel-pop

bottlecap on the ground. Pass the loop over it

several times to become familiar with this sound at

different loop sweep speeds. Note that an aluminum

twist-off bottlecap cannot be used as it is a differ-

ent type of target. Also note that very old rusty

bottle caps may start reading as quarters due to the

elimination of the iron alloy through deterioration.

Once familiar with the sound typical bottle caps

produce, an operator may pass over such targets and

continue searching without consulting the display

information, saving more time for evaluating

possible good targets.

As the loop passes over metal that is likely a good

target, a more consistent and smooth sound will be

heard. A good target typically produces a longer,

more solid sound. Place a quarter on the ground and

sweep the loop over it several times to become

familiar with the sound of a good target.

Why Air/Ground Balance?

When the display prompts you to, AIR BALANCE by

holding the loop at waist level and press ENTER. The

XLT

's circuits are being prepared for ground balanc-

ing by measuring temperature and other variables that

affect electronic circuits. The XLT

"beeps" and you

lower the search coil to the distance above the ground

that you will be searching. Press ENTER to have the

XLT

"cancel/track out" or GROUND BALANCE

the ground mineralization. The XLT

then automati-

cally "tracks out" the varying mineralization as you

continue to search.

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Whites XLT User Manual Page 9

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