How it Works
White’s Electronics
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MXT
User Manual
40 pgs1.58 Mb0
User Manual
36 pgs1.54 Mb0

White’s Electronics MXT User Manual

MXT Table of Contents
MXT Table of Contents
Chapter 1 Assembly...............................................................................2
Assembly Instructions .........................................................................................................................3
Chapter 2 Batteries.................................................................................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
Relic .............................................................................................................................................10-11
Chapter 5 Controls...............................................................................14
Trac................................................................................................................................................16-17
Disc....................................................................................................................................... 20-21
SAT ............................................................................................................................ ................. 22
Threshold...........................................................................................................................................23
Chapter 6 Searching.............................................................................24
Pinpoint T echnique............................................................................................................................24
Headphones ....................................................................................................................................... 25
Field Use & Tuning Tips "Coin & Jewelry"................................................................................ 26-27
Chapter 7 Information..........................................................................32
Proper Care........................................................................................................................................32
Service ...............................................................................................................................................33
Warranty ............................................................................................................................................ 34
Warranty Transfer..............................................................................................................................35
Video and Owner Information...........................................................................................................36
1
Chapter 1 MXT Assembly
Assembly
CLEVIS
LOWER
ROD
LOOP CABLE
WASHERS BETWEEN EACH LOOP EAR & CLEVIS
LOOP OR SEARCH COIL
CABLE RETAINER
CAMLOCK
TRIGGER (behind display)
Twist and insert each end of handle (provided) through top of shipping carton into second flap. (CARRY CARTON)
DISPLAY
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
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.
BOTTOM OF CONTROL BOX
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“S” ROD
LOOP CONNECTOR
CABLE RETAINER
CONTROL BOX
BA TTERY COMPARTMENT DOOR
ELBOW CUP STRAP
ELBOW CUP FOAM PADS INSIDE ELBOW CUP
BA TTERY COMPARTMENT LATCHES
HEADPHONE JACK
Assembly Instructions
1. Remove all parts from shipping carton and check the assembly page to make sure all parts are present.
Chapter 1 MXT Assembly
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.
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 con­nector into control box, screw lock ring to secure.
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 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 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, freshly­buried 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 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,
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Chapter 2 MXT Batteries
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.
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.
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.
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.
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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, recharge­ables should be taken out of service and recharged as soon as you notice "LoBat" on the display.
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.
Rechargeable batteries will not provide the same amount of continuous use as a new set of Alkaline batteries.
When traveling far from home it is always a good idea to carry 8 extra penlight alkaline batteries with you.
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Chapter 3 MXT Quick Start
MXT Quick Start
Trigger Switch has three positions;
1. Forward (Alternate Mode).
2. Center (Primary Search).
3. Squeeze and Held (Pinpoint).
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3
2
TRAC Toggle
Three position switch for setting Ground Mineral Tracking. Salt, Lock (hold), and Ground.
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 THRESH­OLD "hum" recovers from the affects of inconsistencies in ground mineralization.
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5
4
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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.
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
1
Ground position. "▼"
Chapter 3 MXT Quick Start
* SPECIAL NOTICE* SPECIAL NOTICE
* SPECIAL NOTICE
* SPECIAL NOTICE* SPECIAL NOTICE
Set the Trigger Switch (under the hand
2
grip) to the center (Primary Search) position.
Set the MODE toggle to the position that
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best describes your searching desire, Coin & Jewelry, Relic, or Prospecting.
Set the DUAL CONTROL to the DISC
4
ring "▼" for Coin & Jewelry and Relic Mode or to the SAT ring "▼" for Prospecting Mode.
Turn the GAIN control clockwise until the
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power clicks "ON". Rotate the GAIN control clockwise to "▼".
Adjust the THRESHOLD control until you
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hear a soft threshold "hum" (faint sound).
Lower the search coil to the ground, then
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“pump” the coil up and down 2"-4" a couple of times and Fast AutoTrac will automatically balance or track out the ground mineralization.
If you attempt to demonstrate or test the MXT 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 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.
Start swinging the search coil in wide
8
sweeps that overlap each other as near the ground surface as possible.
If you experience false signals or constant
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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.
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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.
VDI number on display
Coin & Jewelry MODE;
The Coin & Jewelry MODE provides 5 different significant indications on the display.
1. VDI = number - The VDI (Visual Discrimina­tion 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.
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VDI number range on reference label
Mode toggle switch forward for Coin and Jewelry
Half block indicating MXT is not certain but possible.
Chapter 4 MXT Display
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 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 indi­cates 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.
Note: Dotted blocks for illustration purposes only.
Note: In this case, the 1¢ is the probable ID.
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. 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 (long­est 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.
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Chapter 4 MXT Display
Relic MODE;
The Relic MODE also provides 5 different signifi­cant indications on the display.
Mode toggle switch Center for Relics
1. VDI = number - As with the Coin and Jewelry mode the relic VDI (Visual Discrimination Indica­tion) 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.
Chapter 4 MXT Display
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 verti­cal 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.
NOTE: The top display is a sure ID. The bottom display with its quarter size bar suggests uncer­tain unless theDepth reading is 6-12.
NOTE: The filled in block and the VDI number are separate opinions by the software and may agree or disagree.
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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.
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