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First Texas Products Teknetics T2 Operating Manual

Professional metal detector guide to metal detecting
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Comprehensive Operating Manual and Guide to Metal Detecting
2
The Teknetics T
is a new high-performance multi-purpose professional grade metal
detector. It utilizes the latest advances in electronic technology, and its functional design
represents the leading edge of the metal detector engineering art. The T
to use properly than other comparable metal detectors. Its combination of light weight and
balance provides comfort unmatched by any other detector in its price range. Its most
popular uses include coinshooting, relic hunting, and gold prospecting.
PRODUCT FEATURES
* Simple, easy-to-use controls
* Large LCD screen with target identification and operating control displays
* Straightforward menu-driven user interface
* Bar graph readout of ground mineral concentration
* Trigger-actuated FASTGRAB
* Waterproof 11-inch open-frame BiAxial™ searchcoil
* Single-Filter All Metal mode for maximum detection depth
* Double-Filter Discrimination modes for searching in trashy areas
* Trigger-actuated target pinpointing with variable audio pitch
If you have any questions, or need assistance with your metal detector,
Call 1-800-413-4131, and ask for Teknetics Customer Service.
Revision Level 6.0
Copyright First Texas Product, L.P. March 28, 2006
Teknetics T
Professional Metal Detector
ground canceling with manual override
™
2
™
2
is easier to learn

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Summary of Contents for First Texas Products Teknetics T2

  • Page 1 Teknetics T ™ Professional Metal Detector Comprehensive Operating Manual and Guide to Metal Detecting The Teknetics T is a new high-performance multi-purpose professional grade metal detector. It utilizes the latest advances in electronic technology, and its functional design represents the leading edge of the metal detector engineering art. The T is easier to learn to use properly than other comparable metal detectors.

  • Page 2: Table Of Contents

    Estimating target size and depth…………. 23 False signals and chatter….……………. 24 Adjusting Sensitivity …………….………. 26 Tips on ground canceling …………………27 Detecting Activities Coinshooting………………………………28 Relic Hunting …........28-29 Gold Prospecting…………………….…29-30 Cache Hunting……………………………..31 Shallow Water Hunting……………………31 How metal detectors work……………………….32 First Texas Products Warranty …………………. 32...

  • Page 3: Quick-Start

    QUICK START Start using your T right out of the box Assemble the detector (see instructions beginning page 4). Install four AA alkaline batteries. All positive terminals point up. Turn the knob, located under the armrest, fully clockwise. This turns the machine on and sets audio volume to maximum. When first turned on, the T starts out in the Discrimination mode, with: Sensitivity preset to 60...

  • Page 4: Mechanicals Assembly Instructions

    ASSEMBLY 1. Remove all components from box. 2. Attach searchcoil to lower rod by lining up the holes. Push coil knob through hole and tighten knob gently. You will tighten up the coil knob later. 3. Insert smallest rod into upper rod (upper rod holds detector body). Turn top locking collar counter-clockwise to open up.

  • Page 5: Mechanicals

    MECHANICALS BATTERIES The T uses four AA batteries. Use ALKALINE batteries for best performance. Rechargeable batteries may be used. Expect 40 hours of service in the field with one set of ALKALINE batteries. If you use rechargeable batteries, good-quality NiMH (nickel-metal–hydride) batteries are recommended.

  • Page 6: Introduction To The Teknetics T

    Introduction to the Teknetics T HIGH PERFORMANCE The Teknetics T is a multi-purpose high-performance computerized metal detector. It has the high sensitivity and ground cancellation features needed for professional gold prospecting, the discrimination responsiveness needed for serious relic hunting under difficult conditions, and visual target ID considered essential in searching for coins.

  • Page 7: Controls

    CONTROLS ON-OFF & VOLUME Knob (Under the elbow) This knob turns the machine on or off, and controls speaker volume and headphone volume. Knob position has no effect on detector’s sensitivity or susceptibility to noise from electrical interference The T has two controls on the front panel, MENU and SETTINGS.

  • Page 8: Menu System

    THE MENU SYSTEM The entire menu is printed on the LCD display. The display highlights the mode and settings which are in use. There are two search modes, All Metal and Discrimination. To change between search modes, the top line of the menu system must be highlighted. Press the MENU button until the top line of the menu is highlighted.

  • Page 9: Ground Cancellation

    GROUND CANCELLATION What is Ground Cancellation? All soils contain minerals. Signals from ground minerals are often tens or hundreds of times as strong as the signal from a buried metal object. The magnetism of iron minerals, found in nearly all soils, causes one type of interfering signal. Dissolved mineral salts, found in some soils, are electrically conductive, causing another type of interfering signal.
  • Page 10 GROUND CANCELLATION (continued) MANUAL GROUND CANCELLATION (continued) The Fe bar graph on the LCD display indicates the amount of magnetic mineralization. The searchcoil must be in motion to measure Fe . The most accurate measurement is obtained by pumping the searchcoil, as in the Ground Cancellation procedure. The two-digit G.C.
  • Page 11 GROUND CANCELLATION (continued) Positive and Negative Response The purpose of ground cancellation is to adjust the metal detector to ignore ground minerals. If the adjustment setting is off, ground minerals will give either a positive or negative response, depending on which direction the adjustment is off. POSITIVE RESPONSE If the G.C.

  • Page 12: All Metal Mode

    ALL METAL MODE The All Metal mode is more sensitive and offers better feel than the Discrimination mode, and is used to find all metal objects present in the ground. The searchcoil must be in motion for objects to be detected. This is a single filter search mode similar to the “fast autotune”, “SAT”, or “P4”...

  • Page 13: Discrimination Mode

    DISCRIMINATION MODE The Discrimination Mode is used to eliminate from detection trash metal objects such as nails, aluminum foil, or pull-tabs. The searchcoil must be in motion for metal objects to be detected. Discrimination incurs some loss of sensitivity to small or deep objects. SENSITIVITY This controls the electronic gain, and is adjustable from 1 to 99.

  • Page 14: Discrimination Mode

    DISCRIMINATION MODE (continued) The “# OF TONES” selections are: 1 Single Medium pitch tone. Discrimination is continuous, not sampled. Good for use in plowed or rocky ground. 1+ Medium-to-High pitch tone varying in proportion to target signal strength. Large shallow objects will produce a squeal. The variable audio pitch provides you more information about the detected object, but some people find the sound on strong signals too annoying.

  • Page 15: Pinpoint Feature

    PinPoint Feature After a buried target has been located using the All Metal or Discrimination modes, you want to pinpoint the exact location of the target in order to facilitate its recovery. Accurate target pinpointing will minimize digging. Activate the PinPoint feature by pulling the trigger switch located under the housing, in front of the grip.

  • Page 16: Lcd Visual Display

    LCD VISUAL DISPLAY In normal operation, when the searchcoil passes over a metal object, the electrical signature (2-digit I.D.) of the metal object is displayed on the numeric display for 4 seconds, unless superceded by another object sooner. On a given buried object, the number will bounce around if the signal is weak or if the amount of ground mineralization is high.

  • Page 17: Target Depth

    LCD VISUAL DISPLAY (continued) Since different metal objects can produce similar signals, and since minerals in the soil can distort the signals, the probable target ID's are just that -- probable. There is no way of knowing for sure what's buried other than to dig it up. Experienced metal detector users have a rule of thumb -- "when in doubt, dig".

  • Page 18: Bar Graph

    LCD VISUAL DISPLAY (continued) BAR GRAPHS Fe (magnetite) This bar graph displays the magnetic mineralization factor, or magnetic susceptibility, of the soil. Magnetic susceptibility is expressed in terms of the percent volume of the iron mineral magnetite, which most black sand is made of. The depth to which objects can be accurately identified is strongly influenced by the magnetic susceptibility of the soil.

  • Page 19: Capabilities & Limitations

    CAPABILITIES AND LIMITATIONS DEPTH The T can detect U.S. coins to a depth of about 12-15 inches under good conditions. Large objects (55 gallon drums, manhole covers, etc.) can be detected to a depth of several feet. Electrical interference from power lines and from electrical appliances and electronic equipment can reduce detection depth, or cause audible interference, making it necessary for the user to reduce the sensitivity setting.
  • Page 20 CAPABILITIES AND LIMITATIONS (continued) GROUND CANCELING To achieve maximum depth in both the ALL METAL and DISCRIMINATION modes, as well as when using the PinPoint feature, the T offers the ability to cancel ground minerals either by manual adjustment, or automatically using the FASTGRAB feature (see p.9). If you do not perform the ground canceling operation, the Discrimination mode will usually still work fairly well, but the ALL METAL mode will not.

  • Page 21: Capabilities & Limitations

    CAPABILITIES AND LIMITATIONS (continued) STEEL BOTTLE CAPS & FLAT IRON TRASH Modern motion-type target ID metal detectors usually have difficulty consistently identifying steel bottle caps and other flat iron trash objects. Double-D searchcoils also have a reputation for being unable to distinguish steel bottle caps from coins, and for being unable to eliminate steel bottle caps from detection.

  • Page 22: Search Techniques

    SEARCH TECHNIQUES Sweeping Searchcoil (this does not apply to Pinpointing with the trigger switch) Keep the searchcoil in motion to detect targets. Sweep the searchcoil parallel to the ground; do not lift the searchcoil at the end of the sweep. When you have located a target and continue sweeping back and forth for verification, use broad, deliberate sweeps across the target for the most accurate target ID.

  • Page 23: Estimating Target Size And Depth

    SEARCH TECHNIQUES (continued) Narrow It Down To narrow the response further, position the searchcoil near the center of the response pattern, release the trigger, and then pull it again. Now you will only hear a response when the searchcoil is right over the top of the target. Repeat this procedure to narrow the zone even further.

  • Page 24: False Signals And Chatter

    SEARCH TECHNIQUES (continued) Estimating Target I.D. With a single sweep over a target, you will usually see a 2-digit target ID displayed on the LCD. Repeated sweeps back and forth over the target may cause the 2-digit target ID values to change with each sweep of the coil; this may seem inconsistent with your discrimination setting.
  • Page 25 SEARCH TECHNIQUES (continued) NUISANCE BURIED OBJECTS In some areas there is a lot of metallic trash which produces weak signals. These could include deeply buried objects, little bits and pieces of rusty iron and corroded foil. These items can be detected, but are difficult to pinpoint due to their depth and small size. When you dig and find nothing, it may seem like the machine is beeping at nothing even though there is actually something there.

  • Page 26: Adjusting Sensitivity

    SEARCH TECHNIQUES (continued) HOT ROCKS A hot rock is a rock which causes the metal detector to sound off because the rock contains iron minerals. They come in two basic types. Negative hot rocks (also called cold rocks) are usually magnetite or contain magnetite, and give a negative response because their ground cancellation phase is a higher number than the soil they are found in.

  • Page 27: Tips On Ground Canceling

    SEARCH TECHNIQUES (continued) Tips on ground canceling When the T first turns on, the ground cancellation Phase Number is preset to 90. This will give a positive response on nearly all soils. If you search in the Discrimination mode, you will probably not have to cancel the ground.

  • Page 28: Detecting Activities

    Detecting Activities Coinshooting Coinshooting is searching for coins, usually in places like parks, schoolyards, church lawns, and people's yards. In most places where coins are likely to be found, there is also a lot of aluminum trash like pull-tabs and bottle caps, as well as steel bottle caps and often nails.

  • Page 29: Gold Prospecting

    Detecting Activities (continued) Relic Hunting (continued) Before you go relic hunting, obtain permission from the property owner. If you intend to hunt on public land, check first with the administrator to make sure it's not illegal. Certain kinds of sites, on both public and private land, are protected by law from relic hunting. If there is a metal detecting club in your area, some of the members will probably know what the laws are in that area and which sites are, and are not off, limits.
  • Page 30 Detecting Activities (continued) Hillsides are the best areas for gold prospecting using a metal detector, because hillsides cannot be cleaned out by panning and dredging the way streams can. Also, gold on hillsides, not far from its source vein, tends to be larger, and hence more readily detected, than alluvial (placer) gold which tends to get pounded to pieces and worn away as it rolls along the streambed with gravel during floods.

  • Page 31: Cache Hunting

    Shallow Water Hunting searchcoils are waterproof, allowing you to search in shallow First Texas Products water about two feet deep. If searching around water, be careful not to get the electronics housing wet. Avoid salt spray, as it will work its way into the control housing and damage the electronics -- such damage is not covered by the warranty.

  • Page 32: How Metal Detectors Work

    Liability under this Warranty is limited to replacing or repairing, at our option, any Teknetics metal detector returned, shipping cost prepaid, to: First Texas Products, L.P. 1100 Pendale Rd. El Paso, TX 79907...

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