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TR 600/ TR 700 METAL/MINERAL DETECTOR


NOTE: The following manual was scanned with OCR software. Be aware that there may be a few misspellings or anomalies due to the inaccuracies of the software translation. Images are excluded due to the memory requirements; therefore, there will be references to illustrations that do not exist in this text only document.

TR 600/ TR 700 METAL/MINERAL DETECTOR

 OPERATING INSTRUCTIONS

1. Introduction

The TR-600 and 700 are solid state electronic. Metal-Mineral detectors designed to provide maximum performance at minimum price.

Both the TR-600 and 700 use the inductively balanced Transmit/Receive (TR) circuit to provide excellent sensitivity and stability as well as ease of operation.

With any detector, operator skill and familiarity with the instrument will determine, in large part, the success at the hunt. We recommend that you read thoroughly the operating instructions and spend some time familiarizing yourself with the instrument. The time you spend doing this will pay off handsomely later.

The detector is shipped fully assembled so the only mechanical adjustment is to ad just the pole length and search coil angle so the search coil is level with the floor and approximately 1/2 inch above the floor when the detector is held in a comfortable operating position (See Search Techniques). Loosen the knurled nut on the search coil pole h adjust the length, and retighten when length is correct. Be careful not to lose or damage the fiber compression ring inside the knurled nut if the pole is accidentally pulled apart.

2. Description Of Controls

(1) On-Off/Volume (600-700)

Rotating this control completely counterclockwise until it clicks turns the unit off. Clockwise rotation of the control turns the unit on and increases the volume level.

(2) Tuning Control (600-700)

The tuning control is used to adjust the detector circuitry for maximum sensitivity in responding to "target" objects and to tune the detector for Metal or Mineral search .

(3) Ground Condition Control (TR-700 only)

This control will ad just the detector to operate normally under troublesome soil conditions, such as magnetically active or mineralized soil.

(4) Intensity meter (600-700)

The intensity meter is very useful in pinpointing small or deep targets and in areas where the surrounding noise level (traffic noise, airplanes, surf, wind, etc..) tends to overpower the audio signal from the speaker.

(5) Battery Check Feature (TR-700 only)

The TR-700 is equipped with a battery check switch. This switch will use the meter needle to indicate the condition of the battery pack. Place the switch in the "BATT CHECK" position to determine the condition of the battery pack. The indicator needle should read .6 or above on the meter scale. When it does not, replace the 8 each 1 1/2 volt pen light batteries. (See "Battery Replacement' Figure 2). After this has been determined, the switch is returned to the "Normal" position for regular detection.

Access to the battery pack is gained by pulling out on the nylon snap-lok fastener on the battery cover on the rear of the detector and removing the cover. This unit is equipped with 8 - 1 1/2 volt Penlight batteries. Any replacement batteries should be Heavy Duty or Alkaline type. Alkaline batteries are recommended for longest life and strongest power source. BE SURE to observe battery polarity when replacing batteries. The holder is marked on the inside + or - to show proper battery orientation. Replace battery cover in reverse order of removal.

CAUTION: When the detector is not in use, it is good practice to remove the battery packs from the unit as weak batteries will sometimes vent and leak. Damage from battery leakage is corrosive and is NOT covered by the lifetime warranty. Play it safe!

(6) Earphone Jack (600-700)

You may wish to obtain earphones to use with your detector. This has several advantages. First, any loud or unwanted noises are effectively masked out, leaving only the sound of target responses to follow. Second, there may be certain areas where you would like to search without attracting attention with the howl from your detector speaker.

(If any curious people approach you while searching, you can just point to your earphones and shake your head to indicate that you can't hear because of the earphones!)

Controls

Third, many of the oldest and most valuable targets are found at greater depths than new ones. With the earphones, a faint target signal that otherwise would go undetected may be recognized and traced. Most successful treasure hunters use earphones regularly.

As a convenience and savings to you, the same STEREO headset that you use for enjoying music from your radio or tape deck may be used with the TR-600 and TR-700 detectors.

NOTE: DO NOT USE A MONAURAL HEADSET or the output circuitry will be damaged I use only a low impedance (8-16 ohm) STEREO headset with 1/4" standard jack .

If you do not own one, Bounty Hunter offers an excellent earphone headset, designed for your instrument, at your nearest dealer.

Before beginning a treasure search you should give some thought to the physical nature of the objects you hope to uncover.

To your metal detector there are but two basic kinds of targets--ferrous and nonferrous. A ferrous object is iron-based or magnetically responsive and includes objects like cannonballs, swords, guns and the like. Unfortunately for the treasure hunter, most of the world's "junk" is also ferrous, such as tin cans, old bottle caps, nuts, bolts, horseshoes and all scrap iron. Most unprocessed metals (ore) will produce a target signal similar to ferrous metal.

On the other hand, most of the valuable objects in history have boon fashioned from nonferrous metals such as silver, gold, copper and brass which are prized not only for their beauty but their durability. Those items include coins, modals, rings, jewelry, watches, buckles, buttons, etc..

You will notice the words "MET" for Metal and "MIN" for Mineral above the tuning control knob on your detector. By tuning the control to the "MET" side you are preparing to search for the nonferrous metals which are usually more valuable.

In some areas you may desire to use the "MIN" side to locate such items of a ferrous nature such as might be found on a battlefield site, or possible search for ore (prospecting). Whichever mode you select, you detector will respond with an increase in signal as that kind of target is approached and a decrease in signal as the other kind is approached.

As a rule, a coin or metallic object, freshly buried, WILL NOT produce as good a signal as a coin which has boon buried for months or years, even though they might be at equal, depths. After a certain length of time the chemicals and minerals in the soil react to the coin's presence by creating an electrical or magnetic field around the coin known as "eddy currents" or by oxidation, such as in the case of ferrous (iron-based) objects rusting.

Both of these phenomena will cause the coin to seem larger to the metal detector than an identically sized object recently introduced to the soil. Also, dry soil is less conductive than damp or wet soil, which is why some of the best treasure hunting is to be found after a good rain (and some of the DEEPEST targets).

4. Tuning Your Detector

(a) Place the detector across your lap or a table so the search coil project into open space away from any large metallic objects.

The tuning control is the kind with no mechanical stops, so the knob will Turn continuously. When the knob is rotated to the end of its usable range (about ton turns), an increase in force will be necessary to Turn farther, indicating the end of effective tuning range.

Approximately five turns from either end of the control's range is an area of adjustment called the "NULL" which is an area of silence between the two areas of search signal.

(b) Turn the detector "ON" and ad just the volume knob to about half level.

(c) Locate the "NULL" with the tuning control.

TUNING FOR METAL

(d) Turn the tuning knob counterclockwise from the null until sound just begins. Maximum response sensitivity is accomplished when just a slight buzz is hoard at the very edge of the "NULL". The detector is now tuned to respond to coins, jewelry and other nonferrous objects. Adjust the volume control to a comfortable level. .

(e) Take a nickel or quarter and pass it over the search coil. You will notice the sound level increases and "peaks" as the coin approaches and passes the center of the coil.

(f) Now take a ferrous object, such as a large stool nut or an old-fashioned "church key" can and bottle opener and pass it over the center of the coil. Notice how the sound decreases as the target passes I

TUNING FOR MINERAL

(g) Turn the knob clockwise from the null until the sound just begins. Ad just the volume to a comfortable level.

h) Take a ferrous object such as the steel nut or pair of scissors and pass it over the coil. The signal will increase over the ferrous objects and decrease over the coins and jewelry I If you have a piece of ore, magnetic rock or pyrites, pass them over the detector and observe the detector response.

Some objects such as watches are made up of both ferrous and nonferrous metals and may produce an opposite signal than expected. It might be a good idea to experiment with some of these objects to learn their detector response.

USING THE INTENSITY METER (TR-600 and TR-700)

The intensity meter is very useful in pinpointing small or deep targets and in areas where the surrounding noise level overpowers the audio signal from the speaker.

To use the meter, just tune the detector as described above for Metal or Mineral search. Ad just the tuning control so just a buzz is hoard just at the edge of the "NULL". The meter will now automatically react to any target signal as will the audio circuit. As the target is passed over by the search coil, both the audio signal and meter needle will "peak" simultaneously.

5. Operation In The Field . . .

STANCE

When holding your detector you should adjust the telescoping coil rod in or out until the search coil is about 1/2 inch above ground surface and parallel to the ground. You should be standing in an upright position without bonding or stooping, thus avoiding unnecessary fatigue .

By holding the detector slightly forward from your body you are in a position to observe the slightest difference in response on the meter, and are in a good position for the search swoop ( Figure 3).

Above all, choose a position that is comfortable for you to more fully enjoy your treasure hunting experience

You may want to practice on some coins or various objects in your back yard. Try burying target at different depths to become familiar with your de detector's capabilities and build confidence for a real hunt

SEARCHING FOR METAL OBJECTS

(a) Place a practice target on (or in) the ground ahead of you.

(b) Hold the search coil approximately 1/2 inch from the ground and turn the tuning control counterclockwise until the sound just begins. Adjust the volume control to a comfortable level.

(c) Swoop the search coil slowly across the ground as shown in Figure 4, keeping the coil as close to 1/2 inch above ground as possible. Try to avoid raising the coil at the ends of the swing, as this causes "de-tuning" and also target-type signal from the speaker or earphones and meter.

(d) As you swoop the coil back and forth, advance an the target by moving forward about 4 inches at a time, just overlapping the proceeding arc.

(o) As the coil passes over the target, you will notice the audio and meter signals "peak" as the object passes the center of the coil.

When using the detector in short grass, the coil can be laid on the top of the grass and slid back and forth to help maintain constant height, which is essential to maintain the most sensitive tuning adjustment. This is where operator skill pays off, regardless of the make or type of detector used.

Pinpointing the Target

Pinpoint targeting will result when your detector signal is the strongest and the search coil is directly centered over the find. When the detector signals a find, slowly move the coil forward and back, then side to side until the signal is the most intense. Your find is the directly beneath the center of your search coil.

To make sure you search an area thoroughly without gaps you may wish to lay out the search area in a grid pattern. Stake out two parallel strings the width of your swoop (about three foot wide) and swoop this area thoroughly. Next move one string over and make a now search area, and so on until the en tire area has boon covered. You may also grid an area mentally using trees, rocks, buildings, etc., as points of reference.

SEARCHING FOR MINERAL OBJECTS

The tuning sequence and search techniques are identical to that for "Metal", with the exception that the tuning control is adjusted far "Mineral".

6. Overcoming Mineralized Soil...

METAL SEARCH

When the soil conditions are fairly neutral or non-mineralized, your detector is not "do-tuned" by small variations in coil height above ground. How over, if the signal is touchy and the detector seems to howl at the slightest dip or irregularity, the mineral content of the ground is probably causing the do-tuning. The more heavily mineralized the ground, the greater will be this de-tuning effect. It may be necessary for you to retune the instrument for a height on one inch above ground to avoid these false signals. Even a skilled operator may have to do this on extremely unlevel ground.

MINERAL SEARCH

Operation of the detecter in the mineral mode is the same as is outlined in the metal mode description above, with the exception that ground mineralization will tend to cause over tuning rather than detuning. This will be evidenced by an increase in sound level as the coil approaches the ground. If this is the case, rather than tuning the detector slightly higher than normal search height, simply lay the coil on the ground to tune the unit and lift it slightly to the normal search height of 1/2 inch.

GROUND CONDITION CONTROL (TR 700 ONLY)

This circuit on the TR-700 is designed to minimize the de-tuning effect of mineralized or magnetically active soil.

If soil conditions in your area of search are fairly neutral or non-mineralized, and your detector coil may be raised or lowered without de-tuning, the Ground Condition Control (G.C.C.) knob should be left in the fully clockwise position to insure maximum depth penetration.

When searching in areas of troublesome soil conditions, rotate the G.C.C. counterclockwise a small amount and retune the detector with the tuning control to enable a normal search. If the soil is heavily mineralized, the G.C.C. knob must be rotated further in the counterclockwise direction to reduce detuning caused by mineralized soil.


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