White’s Electronics MXT Pro User Manual
O
wneR’s Guide
MXT PRO
White’s Electronics, Inc. -
Manufacturers of the World’s Finest Metal Detectors
Congratulations and thank you for choosing
White’s MXT Pro.
The MXT series, which by design marry “versatility & high performance” with “simplicity of use”, is a wildly
successful metal detector design. I’m proud to put my name on the MXT Pro. As well, I’m proud the MXT
is grouped among a handful of landmark metal detector designs. Among the highest tribute, success in
the eld has earned the MXT “benchmark status” for which all other metal detectors are judged.
Listening to successful MXT users, the MXT Pro adds the three things MXT users have been asking
for, Backlight, Multiple Tone ID, and Ground GRAB, a convenient way to update ground tracking from a
locked setting or temporarily lock ground tracking for multiple passes over questionable signals.
This instruction manual will give you a good understanding of the basics. There are no substitutes for eld
experience. Practice using your MXT Pro and then study this manual further. Before long, you may well
be teaching the experts a thing or two.
It is with pride we put our “American Made Label” on every metal detector we build. At our facility here in
Sweet Home, Oregon, USA, we’ve been proudly designing, building from scratch, and distributing world-
wide, the world’s nest metal detectors for nearly 60 years.
It has always been my philosophy to keep our people in Sweet Home, Oregon working by keeping our
customers happy. I’m proud of our metal detectors and the people here at White’s who build them for you.
Happy Hunting!
White’s Electronics, Inc.
“I am proud to say
all White’s Metal Detectors are
built in Sweet Home, Oregon USA”
President
3
MXT
Pro
Table of Contents
MXT Pro Table of Contents
Chapter 1 Assembly.....................................................................................................7
Assembly Instructions.................................................................................................8
Chapter 2 Batteries...................................................................................................9
Standard Battery Holder..............................................................................................9
Using the Standard Battery Holder..............................................................................9
Battery Check..............................................................................................................9
Optional Accessory Rechargable Battery....................................................................10
Chapter 3 MXT Pro Basic Controls & Quick Start.................................................11
Control Summary........................................................................................................11
Mode Toggle................................................................................................................11
Gain Control................................................................................................................11
DUAL Control..............................................................................................................11
Threshold Control........................................................................................................11
TRAC Control..............................................................................................................11
“Music Notes” Tone ID.................................................................................................12
Ground Grab................................................................................................................12
“Light Bulb” Backlight...................................................................................................12
Trigger (On Handgrip)..................................................................................................12
Quick Start...................................................................................................................13
Chapter 4 Display..................................................................................................14
Tone Selection............................................................................................................14
Coin & Jewelry.............................................................................................................14
Relic............................................................................................................................14
Prospecting.................................................................................................................14
Low Battery..................................................................................................................14
Coin & Jewlery...........................................................................................................14
VDI Numbers............................................................................................................14
Display Blocks..........................................................................................................15
Display Text/Labels...................................................................................................15
Depth Indication........................................................................................................15
Relic............................................................................................................................16
VDI Numbers............................................................................................................16
Display Blocks..........................................................................................................16
Display Text/Labels...................................................................................................17
Depth Indication........................................................................................................17
Prospecting................................................................................................................18
VDI Numbers............................................................................................................18
% Iron Targets...........................................................................................................18
GND (Ground) Number.............................................................................................19
5
MXT
Pro
Table of Contents
Chapter 5 Detailed Controls.........................................................................................20
Mode Toggle................................................................................................................20
Coin & Jewelry..........................................................................................................20
Trigger (on handgrip)...............................................................................................20
DUAL Control...........................................................................................................21
“Music Notes” Tone ID.............................................................................................21
Relic...........................................................................................................................21
Trigger (on handgrip)...............................................................................................21
DUAL Control...........................................................................................................22
“Music Notes” Tone ID..............................................................................................22
Prospecting...............................................................................................................22
Trigger (on handgrip)...............................................................................................22
DUAL Control...........................................................................................................22
“Music Notes” Tone ID..............................................................................................23
Concerning All Modes.................................................................................................23
TRAC Toggle...............................................................................................................23
Ground.....................................................................................................................23
Lock..........................................................................................................................23
Salt...........................................................................................................................23
Summary..................................................................................................................24
GAIN Control...............................................................................................................24
OVERLOAD.............................................................................................................24
DUAL Control..............................................................................................................26
Coin & Jewelry & Relic.............................................................................................26
Prospecting..............................................................................................................26
GAIN VS SAT........................................................................................................27
THRESHOLD..............................................................................................................28
Silent Search............................................................................................................28
Chapter 6 Searching..............................................................................................29
Pinpoint Technique...........................................................................................................29
Optional Accessory “DD” Search Coils.............................................................................29
Headphones, Optional......................................................................................................30
“Coin & Jewelry” Field Use & Tuning Tips.........................................................................31
Options...........................................................................................................................31
“Relic” Field Use & Tuning Tips.........................................................................................32
Options...........................................................................................................................33
“Prospecting” Field Use & Tuning Tips..............................................................................34
Options...........................................................................................................................35
Chapter 7 Information...................................................................................................36
Cleaning.................................................................................................................................36
Weather..................................................................................................................................36
Storage...................................................................................................................................36
Precautions.............................................................................................................................36
Service....................................................................................................................................37
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Warranty.................................................................................................................................38
Assembly
Chapter 1 MXT
Pro
Assembly
CLEVIS
LOWER ROD
WASHERS
BETWEEN EACH
LOOP EAR &
CLEVIS
LOOP OR
SEARCH COIL
CABLE RETAINER
CAMLOCK
Twist and insert each end of
handle (provided) through top
of shipping carton into
second ap.
(CARRY CARTON)
Trigger behind display has multi-
function capability depending
on which of the three
modes you select.
LOOP
CABLE
“S” ROD
CABLE
RETAINER
LOOP
CONNECTOR
ELBOW
CUP STRAP
ELBOW CUP
FOAM PADS
INSIDE ELBOW
CUP
Assembly shown on MXT 300
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Chapter 2 MXT
Pro
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,
ber bolt, and thumb nut 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, rst revolution over the top
of the rod. Wind cable all the way to the top of the
curved “S” rod, about ve 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 connector into control box, screw lock ring
to secure.
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 oor 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 rmly into place.
8. Adjust the elbow cup strap so that it is loose
enough for you to slide your arm in and out without
loosening each time you want to set the detector
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 might 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 rejection circuitry, it
may take a number of years for freshly buried targets
to respond at true depths and discrimination accuracy. The best way to determine true detection depth
is in real search conditions.
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 oor. If the instrument t feels
uncomfortable, adjust the elbow cup by removing and
repositioning the bolt/thumb nut and installing
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Chapter 1 MXT
Pro
Batteries
Batteries
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 rst,
and then press down on the rear.
Using the
Standard Battery Holder
1. The standard battery holder holds eight “AA” cell
batteries equaling 12 volts total. Alkaline batteries 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-alkaline batteries 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 Pro
“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. Alkaline batteries provide some reserve time
after “Lo Bat” appears, rechargeable batteries 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.
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
“Lo Bat” indication. Rechargeable batteries cannot.
When traveling far from home it is always a good idea
to carry 8 extra penlight alkaline batteries with you.
Backlight use will slightly reduce battery life, 10% at
the lowest brightness, 20% at medium, and 30% at
the highest setting.
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Chapter 2 MXT
Pro
Batteries
Rechargeable Battery (Opt.)
A rechargeable battery system is not standard equipment with your MXT Pro, however, two different high
quality systems are available.
White’s rechargeable battery #802-5211, and charger
#509-0022 are the recommended standard system
and offer quick charge and overnight charge options.
(QUICK CHARGE IS FOR USA ONLY. It is not avail-
able on 220-240 volt.)
White’s Premium system, #509-0037 NiMH Charger,
#802-5285 NiMH Stand, and #802-5281 NiMH re-
chargeable battery offers extended search times, the
latest Nickel Metal Hydride capabilities for the MXT
Pro.
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 no longer provide
adequate power. The optional Nicad rechargeable
battery pack, however, will diminish slowly (plateau)
in somewhat of a at line and then, near the end of
their useful life, very quickly decline. Regardless of
the battery used, for long search periods, backup
cells are always suggested.
Rechargeable batteries deliver fairly constant voltage
until they require a recharge. If you use them well
beyond low, they may be damaged, will deteriorate
more quickly than if you only use them till their voltage starts to drop signicantly. Therefore, rechargeable batteries should be taken out of service and
recharged as soon as you notice “Lo Bat” on the
display.
Rechargeable batteries (depending upon the type)
may not provide the same amount of continuous use
per recharge compared to “one use life” set of quality
alkaline batteries.
10
MXT Pro
Control Summary
Chapter 3 MXT Pro Basic Controls & Quick Start
MODE Toggle
Three position switch for setting
operating mode. Coin & Jewelry, Relic,
Prospecting.
GAIN Control
Turns the MXT Pro 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 THRESHOLD
“hum” recovers from the affects of
inconsistencies in ground mineralization.
TRAC Toggle
Three position switch selects Ground Mineral Tracking,
Ground (for most searching), Salt (for salt water beaches or conductive alkali ground types), or Lock (to Lock
or hold a particular ground setting).
THRESHOLD Control
Establishes the slight background sound “faint hum” or
edge of sound that is heard continuously 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.
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Chapter 3 MXT Pro Basic Controls & Quick Start
MXT Pro
Display Controls
Trigger Switch has three positions;
1. Center (Primary Search)
2. Squeeze and Held (Pinpoint)
3. Forward (Locks Pinpoint)
4. Prospecting Mode Only, Trigger Squeezed
and held, or pushed forward and locked,
temporarily disables ground tracking (same
function as holding Grab)
“MUSICAL NOTES”
Selects different types of variable tone or pitch options.
GRAB
1. When TRAC control is set to Ground or Salt, Hold GRAB to hold the current ground
setting (disable tracking) for multiple search coil passes over a week or small target signal,
thus avoid tracking out such weak target signals.
2. When TRAC control is set to Lock, press and release GRAB to update the ground
rejection level to the (continuously monitored) current ground rejection (tracking level). This
update is where the ground rejection would have been had the TRAC control been set to
the Ground or Salt setting continuously. Grab is a far more convenient way to update the
Locked tracking level. Instead of having to reach over and switch TRAC, from LOCK to an
active position, reestablish a usable ground setting, and then switch TRAC back to LOCK.
With GRAB you simply press and release the key right under your thumb, and you have
updated to current ground conditions. Note, last used TRAC position before Locking (Salt
or Ground) determines the ground balance range available to Grab. If Ground was the last
TRAC position used, Grab will grab the best available setting within the Ground Range of
rejection. If Salt was the last used TRAC position, grab will grab the best available tracking
level well into the conductive salt range.
“Light Bulb” Backlight
Select and adjust the display backlight level for use in low light conditions. Minor additional
battery life cost.
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