White’s Electronics MXT 300 User Manual

5 (3)
MXT 300 Table of Contents
Chapter 1 Assembly
...............................................................................
Assembly Instructions
...............................................................................................................................
3
Chapter 2
Batteries
.................................................................................
Standard Battery Holder
...........................................................................................................................
Using the Standard Battery Holder
...........................................................................................................
Rechargeable Battery (Opt.)
....................................................................................................................
5
Battery Check
............................................................................................................................................
5
Chapter 3 MXT 300 Quick Start
............................................................
6
Chapter 4 Display
......
Coin & Jewelry
......................................................................................................................................
Relic
...................................................................................................................................................
Prospecting
.........................................................................................................................................
Chapter 5 Controls
...............................................................................
Mode
..................................................................................................................................................
Trac................................................................................................................................................
....
Gain...............
.....................................................................................................................................
Dual Control
.......................................................................................................................................
20-22
Disc
....................................................................................................................................................
20-21
SAT
.........................................................................................................................................................
Threshold
................................................................................................................................................
23
Chapter 6 Searching
.............................................................................
Pinpoint Technique
.................................................................................................................................
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
..........................................................................
Proper Care
.............................................................................................................................................
32
Service
.....................................................................................................................................................
32
Warranty
.................................................................................................................................................
33
Warranty Transfer
..................................................................................................................................
34
Warranty (UK)
........................................................................................................................................
35
Warranty Transfer (UK)
..........................................................................................................................
36
MXT 300 Table of Contents
2
Assembly
Chapter 1 MXT 300 Assembly
CUP
STRAP
CUP
CONTROL BOX
“S” ROD
CAMLOCK
WASHERS
TRIGGER
COMPARTMENT
COMPARTMENT
CONNECTOR
JACK
CLEVIS
LOWER
ROD
CONTROL BOX
Twist and insert each end of
top of shipping carton into
second fl ap.
CABLE RETAINER
CABLE RETAINER
COIL
control box, one in each of the front corners
CABLE
2/ Target Identifi cation
3/ Iron Probability
4/ Target Signal Strength
5/ Target Depth
6/ Pinpoint Location
7/ Battery Voltage
Target VDI
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 300 Assembly
Assembly Instructions
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 thumbnut to secure loop/search
coil to clevis/lower rod.
3.
Unlock "S" rod camlock and insert clevis/low-
er rod into curved "S" rod so that stainless steel
the adjustment holes in the curved "S" rod. Turn
camlock to secure. The second or third adjustment
holes are suitable for average size adults. Individ-
uals 6' or taller should use the fully extended posi-
tion. Individuals well over 6' tall should purchase
the optional
4.
Unravel loop cable and wind the cable around
the clevis and rod assembly, fi rst revolution over
the top of the rod. Wind cable all the way to the
top of the curved "S" rod, about fi 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
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 fl oor. If the instru-
ment fi t 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 fl 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 fi rmly 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 de-
tector 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
tacts facing toward inside of battery compartment.
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
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 determine
true detection depth is in real search conditions.
4
Chapter 2 MXT 300 Batteries
Standard Battery Holder
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 (-) 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 fi rst, then press down on the
rear.
Standard Battery Holder
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 300
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 pull-
ing 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 300 Batteries
Non-rechargeable batteries will start to drop in
voltage as soon as they are put into use and then
rechargeable battery pack, however, will diminish
very slowly (plateau) in somewhat of a fl at 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
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.
A rechargeable battery system is not standard equip-
ment with your MXT 300, however, high quality
White's rechargeable battery #802-5211, and char-
ger #509-0022 are recommended and offer quick
charge and overnight charge options. (
QUICK
CHARGE
is for USA ONLY. It is not available
on 220-240 volt.)
Rechargeable batteries deliver fairly constant volt-
age 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 signifi cantly. 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.
Chapter 3 MXT 300 Quick Start
MODE Toggle
Three position switch for
Coin & Jewelry, Relic, Prospecting.
GAIN Control
Turns the MXT 300 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 rejec-
tion (Discrimination). In the Prospecting
Mode establishes Self Adjusting Threshold
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
TRAC Toggle
Three position switch for setting
Ground Mineral Tracking. Salt,
Lock (hold), and Ground.
Trigger Switch has three positions;
2. Center (Primary Search).
3. Squeeze and Held (Pinpoint).
1
2
3
4
5
6
Chapter 3 MXT 300 Quick Start
Quick Start
With the MXT 300 properly assembled and
the batteries installed, follow the instruc-
tions below to start fi nding 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 "
Mode or to the SAT ring "
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
ground surface as possible.
If you experience false signals or constant
beeping or popping and you are not near
common sources of electrical interference,
It is normal to hear very slight fl uctuations
in the THRESHOLD “hum” as the MXT
300 tracks out the ground mineralization.
When operating in the Prospecting Mode,
rst try reducing the Gain and/or increasing
the SAT speed. SAT speeds as high as HY-
PERSAT may be necessary in some ground
conditions. If Gain and SAT adjustments do
not smooth performance, then switch to the
Trac Lock position.
1
2
3
4
5
6
7
8
9
* SPECIAL NOTICE
If you attempt to demonstrate or test the
MXT 300 by waving targets in the air in
front of the search coil, it is ESSENTIAL
to have the GROUND BALANCE toggle
in the Lock position, NOT Ground or
Salt.
This is necessary, for when the MXT 300
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 300 with targets while in
TRAC Ground or Salt positions must be
done in or on the ground.
7
8
Chapter 4 MXT 300 Display
The MXT 300 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 suit-
ing the MXT 300 to the application, Coin & Jew-
elry, Relic, or Prospecting.
In all MODEs, the display will momentarily show
a software version and battery voltage upon fi rst
turning the GAIN "on". The MXT 300 operates on
a twelve volt battery system which with new quality
batteries will indicate 12 + volts. During search-
ing "LoBat" will start appearing on the display at
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 300 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
The VDI (Visual Discrimi-
nation 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 al-
loys and sizes.
VDI number on display
VDI number range on reference label
forward for Coin and
Jewelry
2. Blocks -
A series 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
they may or may not agree. There is signifi cance to
how these blocks appear. A full block indicates the
MXT 300 is confi dent of indication. A half block in-
dicates the MXT 300 is not confi dent but is making
an educated indication. A quarter block indicates the
MXT 300 is not confi dent at all, guessing based on
what little information the target is producing.
3. Labels -
The most common metal target (or tar-
gets 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 fi rst to be listed is the most
common and the second listed slightly less common
than the fi rst.
4. Depth Indication -
Trigger (on hand grip)
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
range, and the depth reads deep 6 to 12 inches, you
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. PP Blocks -
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 (lon-
gest possible length PP Blocks) is the depth reading
giving you the most accurate depth indication. Also
of importance is that with some experience the rela-
tive size and shape of the metal target can be recog-
nized during pinpointing.
Chapter 4 MXT 300 Display
Chapter 4 MXT 300 Display
Relic MODE;
The Relic MODE also provides 5 different signifi -
cant indications on the display.
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 simi-
lar VDI numbers for different objects because their
makeup and electrical charasteristics are similar.
Using the reference label below the display one can
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 300 Relic mode uses the
mode to further confi rm, 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 300 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 300 Display
The fi lled in block and the VDI number are
separate opinions by the software and may agree or
disagree.
The top
display is a sure
display with its
quarter size bar
suggests un-
certain unless
theDepth reading
switch Center
for Relics
4. Depth Indication -
Trigger (on hand grip)
of coin sized metals. Just as in the Coin and Jewelry
mode, Depth not only tells you how deep the target
is but combined with the block reading and target
label on the right side of the display it can indicate
if the item is worth digging. A 6 - 12 Depth read-
ing and any Block indication means dig. Shallower
targets and a quarter or half size block suggests
trash. This is because the heavier more desirable
targets settle deeper into undisturbed ground. The
to warrant digging.
Chapter 4 MXT 300 Display
Before
squeezing the
trigger, the quar-
ter Block reading
says the MXT
300 isnot sure.
A depth reading
can help
you decide to
dig or not.
A depth of
gests you
should dig.
a depth of
3 with only
a quarter
suggests
the target is
questionably
trash.
technique to "Pinpoint" the exact center of the target.
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