Whites MXT Manuel utilisateur

MXT Table of Contents

Chapter 1 Assembly...............................................................................2

Assembly Instructions .........................................................................................................................3

Chapter 2Batteries.................................................................................4

Standard Battery Holder......................................................................................................................4

Using the

Standard Battery Holder...................................................................................................................4

Rechargeable Battery (Opt.)................................................................................................................5

Battery Check ......................................................................................................................................5

Chapter 3 MXT Quick Start ..................................................................6

Chapter 4 Display ..................................................................................8

Coin & Jewelry................................................................................................................................ 8-9

Relic .............................................................................................................................................10-11

Prospecting .................................................................................................................................. 12-13

Chapter 5 Controls...............................................................................14

Mode............................................................................................................................................ 14-15

Trac................................................................................................................................................16-17

Gain............... .............................................................................................................................. 18-19

Dual Control ................................................................................................................................ 20-22

Disc....................................................................................................................................... 20-21

SAT .............................................................................................................................................22

Threshold...........................................................................................................................................23

Chapter 6 Searching.............................................................................24

Pinpoint Technique............................................................................................................................24

Headphones .......................................................................................................................................25

Field Use & Tuning Tips "Coin & Jewelry"................................................................................ 26-27

Field Use & Tuning Tips "Relic" ................................................................................................ 28-29

Field Use & Tuning Tips "Prospecting" ...................................................................................... 30-31

Chapter 7 Information..........................................................................32

Proper Care........................................................................................................................................32

Service ...............................................................................................................................................33

Warranty ............................................................................................................................................34

Warranty Transfer..............................................................................................................................35

Video and Owner Information...........................................................................................................36

MXT Table of Contents

Assembly

Chapter 1 MXT Assembly

ELBOW

CUP

STRAP

ELBOW CUP

FOAM PADS

INSIDE ELBOW

CUP

CONTROL BOX

“S” ROD

LOOP CABLE

CAMLOCK

WASHERS

BETWEEN

EACH LOOP

EAR & CLEVIS

DISPLAY

TRIGGER

(behind display)

BATTERY

COMPARTMENT

DOOR

BATTERY

COMPARTMENT

LATCHES

LOOP

CONNECTOR

HEADPHONE

JACK

CLEVIS

LOWER

ROD

BOTTOM OF

CONTROL BOX

Twist and insert each end of

handle (provided) through top

of shipping carton into

second flap.

(CARRY CARTON)

CABLE RETAINER

LOOP OR SEARCH

COIL

Remove decal paper from the two rubber

bumpers. Install on the bottom of the

control box, one in each of the front corners

(shown below by "X"). Press in place and

hold firmly for a few seconds then release.

CABLE

RETAINER

1/ VDI Numbers

2/ Target Identification

3/ Iron Probability

4/ Target Signal Strength

5/ Target Depth

6/ Pinpoint Location

7/ Battery Voltage

Target VDI

reference chart for

all three modes:

/Coin & Jewelry

/Relic

/Prospecting

Trigger behind display has multi-

function capability depending

on which of the three

modes you select

Chapter 1 MXT Assembly

Assembly Instructions

1. Remove all parts from shipping carton and

check the assembly page to make sure all parts are

present.

2. There are rubber washers between clevis/lower

rod and loop ears. Use only nonmetallic washers,

fiber bolt, and thumbnut to secure loop/search

coil to clevis/lower rod.

3. Unlock "S" rod camlock and insert clevis/

lower rod into curved "S" rod so that stainless

steel spring clip buttons line up and lock into one

of the adjustment holes in the curved "S" rod.

Turn camlock to secure. The second or third

adjustment holes are suitable for average size

adults. Individuals 6' or taller should use the fully

extended position. Individuals well over 6' tall

should purchase the optional Tall Man Rod.

4. Unravel loop cable and wind the cable around

the clevis and rod assembly, first revolution over

the top of the rod. Wind cable all the way to the

top of the curved "S" rod, about five revolutions.

Use the black cable retainers, one near the loop,

and one near the top of the curved "S" rod, to hold

the loop cable in place.

5. Unlock control box rod camlock and insert

curved "S" rod so that stainless steel spring clip

buttons line up and lock into the rod on top of the

control box. The "S" rod is designed to curve up

toward the display. However, those who prefer to

sweep the loop close to their feet may desire to

assemble the "S" rod to curve down toward the

ground. Turn camlock to secure. Plug loop con-

nector into control box, screw lock ring to secure.

6. Grip the instrument by the handle, with your arm in

the elbow cup with strap secure, and sweep the loop/

search coil over the floor. If the instrument fit feels

uncomfortable, adjust the elbow cup by removing

and repositioning the bolt/thumbnut and installing

in one of the optional positions. If necessary,

readjust clevis/lower rod length with the spring

clip buttons so that the search coil can be held near

the floor without requiring stooping over.

7. Remove the protective paper from the two black

elbow cup foam pads. Carefully align pads on the

inside of the elbow cup, one on each side of the

center rod, and press firmly into place.

8. Adjust the elbow cup strap so that it is loose

enough for you to slide your arm in and out with-

out loosening each time you want to set the detec-

tor down. The elbow cup strap provides extra

leverage and control. However, some prefer not to

use it.

9. Install battery as described in the next section,

decal facing down, with plastic tab and steel contacts

facing toward inside of battery compartment.

10. It should be noted at this point that the detector

may not work as expected indoors due to the high

degree of metals used in modern construction. It is

best to tune and practice out-of-doors to ensure

stable, predictable results. Additionally, freshly-

buried targets will not produce the normal depth

and discrimination results of targets that have been

naturally lost and settled in the ground. Due to the

abnormality caused by digging a hole in the ground

matrix, and the sophistication of the ground rejec-

tion circuitry, it may take a number of years for

freshly-buried targets to respond at true depths and

discrimination accuracy. The best way to deter-

mine true detection depth is in real search condi-

tions.

Batteries

Chapter 2 MXT Batteries

Using the

Standard Battery Holder

1. Slide open the battery holder lid (decal side of

battery holder) by applying gentle upward

pressure on the tab of the door so that it unlocks.

Slide the door away from the battery box

exposing the cell positions.

2. Remove any old cells from the holder. Note the

(+) and (-) positions of each cell and the (+)

and (-) for each position marked inside the cell

tray. Install new “AA” cells noting carefully the

correct (+) and (-) positions.

If the cells are installed incorrectly, the detector

may require service by an Authorized

Service Center.

3. Slide the door closed so that it snaps securely.

4. Insert the battery holder into the detector so that

the decal is facing down, with the battery

holder door tab and metal contact points facing

toward the inside of the battery compartment.

Close the battery compartment door and secure the

two latches on the bottom of the case. Hook the

front of each latch first, then press down on the

rear.

Standard Battery Holder

1. The standard battery holder holds eight “AA”

cell batteries equalling 12 volts total. Alkalines are

recommended for use with this model. During

normal searching conditions you can expect about

40 hours of hunting time from a quality set of eight

alkaline batteries.

2. Non-alkaline batteries can be used in this holder.

When non-alkalines or rechargeable “AA”

cells are used, detecting time (before replacement/

recharge) may be reduced to about 30-35

hours.

3. The battery voltage appears automatically on the

display when the Gain is used to turn the MXT

"ON". Once the batteries become weak (8 volts)

"Lo Bat" will automatically appear on the display

during searching. At that point the batteries should

be replaced. Alkalines provide some reserve time

after "Lo Bat" appears, rechargeable do not.

4. The battery compartment opens by gently

pulling down on the front of each of the two

latches (on the bottom of the control box) releasing

the catch and hinging open the door.

Chapter 2 MXT Batteries

Non-rechargeable batteries will start to drop in

voltage as soon as they are put into use and then

steadily diminish in voltage till they die. The Nicad

rechargeable battery pack, however, will diminish

very slowly (plateau) in somewhat of a flat line and

then drop like a rock.

Headphone use prolongs all battery life.

Battery life will vary a great deal with temperature,

number of target signals, battery type, brand, and

shelf life.

Alkaline Batteries may be used (in a pinch) well

into the "LoBat" indication. Rechargeables can not.

When traveling far from home it is always a good

idea to carry 8 extra penlight alkaline batteries with

you.

Rechargeable Battery (Opt.)

A rechargeable battery system is not standard

equipment with your MXT, however, high quality

systems are available.

White's rechargeable battery #802-5211, and

charger #509-0022 are recommended and offer

quick charge and overnight charge options.

Rechargeable batteries deliver fairly constant

voltage until they're nearly dead. If you use them

until they are dead, they will deteriorate more

quickly than if you only use them till their voltage

starts to drop significantly. Therefore, recharge-

ables should be taken out of service and recharged

as soon as you notice "LoBat" on the display.

Rechargeable batteries will not provide the same

amount of continuous use as a new set of Alkaline

batteries.

MXT Quick Start

Chapter 3 MXT Quick Start

MODE Toggle

Three position switch for

setting operating mode.

Coin & Jewelry, Relic, Prospecting.

GAIN Control

Turns the MXT ON/OFF and adjusts the

signal strength of targets, ground, and

electrical interference.

DUAL CONTROL

In Coin & Jewelry and Relic Modes

establishes the level of trash metal rejection

(Discrimination). In the Prospecting Mode

establishes Self Adjusting Threshold

(SAT), the speed at which the THRESH-

OLD "hum" recovers from the affects of

inconsistencies in ground mineralization.

THRESHOLD Control

Establishes the slight background sound "faint

hum" or edge of sound, that is heard continu-

ously during searching. Once this edge of sound

has been located some operators prefer to adjust

slightly counterclockwise of it to achieve silent

search, no continuous background hum, during

searching.

TRAC Toggle

Three position switch for setting

Ground Mineral Tracking. Salt,

Lock (hold), and Ground.

Trigger Switch has three positions;

1. Forward (Alternate Mode).

2. Center (Primary Search).

3. Squeeze and Held (Pinpoint).

Chapter 3 MXT Quick Start

Quick Start

Instructions

With the MXT properly assembled and the

batteries installed, follow the instructions below to

start finding treasures!

Set the Ground Balance Toggle to the

Ground position. "▼"

Set the Trigger Switch (under the hand

grip) to the center (Primary Search)

position.

Set the MODE toggle to the position that

best describes your searching desire,

Coin & Jewelry, Relic, or Prospecting.

Set the DUAL CONTROL to the DISC

ring "▼" for Coin & Jewelry and Relic

Mode or to the SAT ring "▼" for

Prospecting Mode.

Turn the GAIN control clockwise until the

power clicks "ON". Rotate the GAIN

control clockwise to "▼".

Adjust the THRESHOLD control until you

hear a soft threshold "hum" (faint sound).

Lower the search coil to the ground, then

“pump” the coil up and down 2"-4" a

couple of times and Fast AutoTrac will

automatically balance or track out the

ground mineralization.

Start swinging the search coil in wide

sweeps that overlap each other as near the

ground surface as possible.

If you experience false signals or constant

beeping or popping and you are not near

common sources of electrical interference,

set TRAC to LOCK and/or reduce GAIN

(counterclockwise) slightly and try again.

It is normal to hear very slight fluctuations

in the THRESHOLD “hum” as the MXT

tracks out the ground mineralization.

When operating in the Prospecting Mode,

first try reducing the Gain and/or increasing

the SAT speed. SAT speeds as high as

HYPERSAT may be necessary in some

ground conditions. If Gain and SAT

adjustments do not smooth performance,

then switch to the Trac Lock position.

* SPECIAL NOTICE* SPECIAL NOTICE

* SPECIAL NOTICE

If you attempt to demonstrate or test the

MXT by waving targets in the air in front

of the search coil, it is ESSENTIALto

have the GROUND BALANCE toggle in

the Lock position, NOT Ground or Salt.

This is necessary, for when the MXT is in

the Ground or Salt positions, the search

coil must SEE ground while it is passing

over the target or it will think that the

target IS ground and will attempt to track

it out. This is the case in all MODEs.

You may, however, demonstrate the fast

ground balancing feature of Ground or

Salt by waving or pumping a mineralized

rock in the air in front of the search coil.

Testing the MXT with targets while in

TRAC Ground or Salt positions must be

done in or on the ground.

Chapter 4 MXT Display

MXT Display Indication

The MXT display and reference label below the

display provide a wealth of information about the

metal target. It is important, however, to understand

the display information should only be consulted

after a solid repeatable audio tone "beep" has been

located.

The MODE selection changes the type and content

of the information shown by the display better

suiting the MXT to the application, Coin & Jewelry,

Relic, or Prospecting.

In all MODEs, the display will momentarily show a

software version and battery voltage upon first

turning the GAIN "on". The MXT operates on a

twelve volt battery system which with new quality

batteries will indicate 12 + volts. During searching

"LoBat" will start appearing on the display at 8

volts and anything 8 volts and below are suspect for

replacement. If using rechargeable batteries 8 volts

is surely the end of their performance. If you are

using quality alkaline batteries you do have a

reserve after 8 volts. The MXT utilizes a low

voltage regulator. Quality alkaline batteries will

provide normal performance (in a pinch) well into

the LoBat indication.

Coin & Jewelry MODE;

The Coin & Jewelry MODE provides 5 different

significant indications on the display.

1. VDI = number - The VDI (Visual Discrimina-

tion Indication) is a reference number dictated

mostly by the metals targets exact alloy, size, and

shape. The reference label below the display

provides a comparison of known targets and their

common VDI numbers. Like targets produce like

VDI numbers. Similar targets produce similar VDI

numbers. And different targets produce different

VDI numbers. Different metal targets, however,

may share the same VDI numbers based on their

electrical characteristics. VDI numbers from -95 to

+94 are available and cover the entire range of

alloys and sizes.

VDI number on display

VDI number range on reference label

Mode toggle switch

forward for Coin and

Jewelry

2. Blocks - Aseries of 16 blocks appear along the

bottom portion of the display and line up with the

indications on the reference label below the display.

It is important to note these blocks are a different

separate opinion compared to the VDI number and

they may or may not agree. There is significance to

how these blocks appear. A full block indicates the

MXT is confident of indication. A half block indi-

cates the MXT is not confident but is making an

educated indication. A quarter block indicates the

MXT is not confident at all, guessing based on what

little information the target is producing.

3. Labels - The most common metal target (or

targets in some cases) to indicate that particular

Block is listed on the display as well as referenced

in an expanded format on the label below the

display. If two targets are listed the first to be listed

is the most common and the second listed slightly

less common than the first.

4. Depth Indication - Trigger (on hand grip)

squeezed and held, the display indicates the depth

of coin sized metals. Starting at 12 inches and

indicating in descending order (as the target gets

closer to the bottom of the search coil) the DEPTH

= 12 provides not only an aid in better locating the

target in the ground (how deep you will need to dig)

but also clues as to if the metal target is likely worth

digging. For example if the display is unsure

(quarter block indication), is indicating in the FOIL

range, and the depth reads deep 6 to 12 inches, you

should dig the target. Only the heavier more valued

targets get deeper into undisturbed ground. If the

display reads unsure (quarter block), indicates in the

FOIL area, and the depth reads shallow 0 to 2

inches, the target is most likely not worth digging.

Foil will not sink deeply into undisturbed ground.

Targets that indicate depth readings from 3 - 5

inches are not as predictable.

5. PPBlocks - Trigger (on the hand grip) squeezed

and held, the PP blocks aid in pinpointing the exact

center of the metal target. Only when the search coil

is directly over the center of the metal target (long-

est possible length PP Blocks) is the depth reading

giving you the most accurate depth indication. Also

of importance is that with some experience the

relative size and shape of the metal target can be

recognized during pinpointing.

Chapter 4 MXT Display

Note: Dotted blocks for illustration purposes only.

Half block indicating MXT is not certain but possible.

Note: In this case, the 1¢ is the probable ID.

Chapter 4 MXT Display

Relic MODE;

The Relic MODE also provides 5 different signifi-

cant indications on the display.

1. VDI = number - As with the Coin and Jewelry

mode the relic VDI (Visual Discrimination Indica-

tion) is a reference number dictated mostly by the

metal targets exact alloy, size, and shape. And just

like coins and jewelry, relics can present with

similar VDI numbers for different objects because

their makeup and electrical charasteristics are

similar. Using the reference label below the display

one can see that iron relics are still in the low VDI

numbers and objects like brass buttons and buckles

with a high concentration of non-ferrous metal or

alloy rate higher VDI numbers compared to their

size and purity.

2. Blocks - The MXT Relic mode uses the same

sixteen filled in Blocks as Coin and Jewelry mode

to further confirm, on the reference label, the

connection between the VDI number and software's

best determination of the target identity. The verti-

cal size (one quarter, one half, or the whole block)

tells one how sure the MXT is of the target ID. Full

bar and half bar usually means dig. Quarter blcoks

are uncertain.

3. Labels - In Relic mode you will see target ID

labels in the upper right of the display. The labels

are Hot Rock, IRON, BUTTON, BULLET and

BUCKLE. Obviously there are many more relic

items possible. Just keep your imagination open for

what possible objects were produced in metal and

how they might compare in size and alloy to the

ones mentioned above.

Chapter 4 MXT Display

NOTE: The filled in block and the VDI number are

separate opinions by the software and may agree or

disagree.

NOTE: The top

display is a sure

ID. The bottom

display with its

quarter size bar

suggests uncer-

tain unless

theDepth reading

is 6-12.

Mode toggle

switch Center

for Relics

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