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GROUND BALANCING

What is Ground Balancing? 
Why do I need to Ground Balance?

All soils contain minerals.  Signals from ground minerals are

often tens or hundreds of times stronger than 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.
Ground Balancing is the process by which the

metal detector cancels the unwanted signals

coming from the ground minerals while still detecting

the signals from buried metal objects. This is

accomplished by matching the detector’s ground

balance setting to the phase of the ground signal.
When the detector is calibrated to the soil, the

result will be deeper target detection, quieter

operation, and more accurate target identification.

How to Ground Balance your detector:

Ground Balancing procedure with the Ground Grab

®

CoMPuTErIZED

GrouND BALANCING (GG) touchpad.

1. Turn the detector on and set GAIN at the 12:00 position.

2. Click on the right knob to the ALL METAL Mode. 

3. rotate the THrESHoLD control knob to the point where you hear a

slight background hum.

4. Sweep searchcoil across the ground to find a clear patch of ground with

no metal present.

5. Press and hold the Ground Grab

®

CoMPuTErIZED GrouND

BALANCING (GG) touch pad, and pump searchcoil over the clean

ground.  

See illustration above.

Pump searchcoil from within 1” of ground to 6”- 8” above ground.

6. When the GND PHASE 

settles down 

to only 1 or 2 numbers in variation,

release the GND GrAB button while still pumping the searchcoil. Note

that the audio response to the ground changed and “Evened out” when

you released the button. Also note that the GND BAL value changed.

After balancing, you can hunt in ALL METAL... or return to Disc Mode.

The most accurate GND PHASE value is the value displayed when “pumping”

the searchcoil over the ground in an area free of metal.

Ground Balancing continued on next page

Pumping coil
to ground
balance with
COMPUTER-
IZED
GROUND
BALANCING
button.

Using PINPOINT

Press-and-Hold the Pinpoint button to narrow down the location of a buried metal object.

Pinpoint is a mode of detection which does not require the searchcoil to be in motion.

A motionless searchcoil held over a metal object will induce a hum; volume and

pitch of the hum increase with target strength.

The approximate target depth, in inches, will be indicated in the center of the screen.

The depth scale is calibrated to coin-sized objects.

relative depth is indicated for larger or smaller objects.

upon releasing the button, you will return to the motion Discrimination detection mode.

If you keep the Pinpoint button depressed for a long time, the audio tone may begin to drift.

If you plan to search like this, release and re-press the button periodically to avoid

drift. Drift may result in a loudening sound or a reduced sensitivity with no sound.

See the manual section on Target Pinpointing for how to 

narrow down 

a target’s location.

This technique is indispensable as long-buried metals can look exactly like the

surrounding soil to the naked eye. If you are not adept at pinpointing, digging up

a small metal object can be very frustrating. So learn how to 

narrow-it-down.

READING THE DISPLAY

TARGET-ID

Each time you pass the searchcoil over a metal object, a 2-digit value will appear in

the center of the display. See the manual section on Target Identification for a better

understand of these values.

Three segments will simultaneously appear above the arc at the top of the screen.

This represents the same Target Identification, but displayed graphically within the scale.

Target Scale

This display works as in the All Metal Mode.

The arc across the top classifies metal objects.

Each time a target is detected three segments will illuminate above the arc.

The segments will remain illuminated for three seconds.

This indication shows the approximate classification of the buried metal object.

See the section on Target Display for a more detailed explanation.

Iron is on the left. u.S. dimes and quarters are to the far right.

In an air test, gold indicates right of center -- the larger the gold piece, the

farther to the right. 

In the ground, the ID of gold may jump around with each pass of the coil.

SIGNAL

Each time a target is detected, bars will illuminate on the bottom left showing the

strength of the target’s signal.

If all 7 bars illuminate, the target signal is strong.

This may be a large metal object. 

or it may be a coin-sized metal object close to the surface.

If only a few bars illuminate, the target signal is weak.

This may be a deeply buried object, even a big one.

or it may be a very, very small metal object, close to the surface.

The depth of a coin-sized object can be confirmed using Pinpoint.

OPERATING  IN  DISCRIMINATION  MODE

Содержание Gold Bug Pro

Страница 1: ...amouflage with Fisher logo FCCAP Fisher Coffee Mug 16oz stainless steel and plastic FMUG Fisher T Shirt 100 cotton with Fisher Logo Sizes S M LG XL XXL FTSHIRT Replacement Accessory Searchcoils 11 DD...

Страница 2: ...2 39...

Страница 3: ...ontrols 13 Control Panel 13 Control Knobs off on Gain 14 Disc All Metal Threshold 15 Touchpad Controls Ground Grab Computerized Ground Balancing Pinpoint 15 and 15 operating in All Metal Mode Ground G...

Страница 4: ...it n cessaire l tablissement d une communication satisfaisante Introduction to the Gold Bug Pro The new Gold Bug Pro is unique among gold prospecting metal detectors for its combination of high sensit...

Страница 5: ...he detector emits different tones for different types of metals and when the detector eliminates certain metals we refer to this as the detector discriminating among different types of metals Discrimi...

Страница 6: ...age Remove and dispose of any and all trash and litter found Appreciate and protect our inheritance of natural resources wildlife and private property Act as an ambassador for the hobby use thoughtful...

Страница 7: ...IDDLE STEM into the S roD with the SILVEr BuTToN pointed upward 5 rotate the MIDDLE STEM until the SILVEr BuTToN locates in the hole 6 Twist the LoCKING CoLLAr fully in the clockwise direction until i...

Страница 8: ...ies Do not use Heavy Duty batteries rechargeable batteries can also be used If you wish to use rechargeable batteries we recommend using a Nickel Metal Hydride rechargeable battery The battery compart...

Страница 9: ...rface Never swing the searchcoil like a pendulum WroNG CorrECT QUICK START DEMONSTRATION I Supplies Needed a Nail a Zinc Penny dated after 1982 a Nickel a Quarter II Position the Detector a Place the...

Страница 10: ...ctive searchcoil often causes noise of a more intermittent nature than electrical interference The second most common cause is a loose searchcoil connector The noise from a loose connector will usuall...

Страница 11: ...oth Wi Fi etc which often affect metal detectors overall the potential for electromagnetic interference is greater than it was just a few years ago Modern high end metal detectors are a lot more sensi...

Страница 12: ...r to always carry a magnet to help discriminate gold from hot rocks and iron Gold will not be attracted to a magnet Pieces of iron will always be attracted to a magnet Negative hot rocks will almost a...

Страница 13: ...ner s permission Prospecting clubs such as the Gold Prospector Association of America GPAA often own claims which are open to its members and sponsor group outings to productive gold prospecting areas...

Страница 14: ...e the loss of sensitivity resulting from discrimination is enough to cause those little nuggets to vanish If you have gone many hours without finding gold and are wondering if there is something wrong...

Страница 15: ...he object and its distance from the searchcoil As a starting point refer to the table below TARGET Readout The table below lists some common approximate target values With experience in the field you...

Страница 16: ...metal objects in the ground The searchcoil must be in motion for objects to be detected Ground Grab COMPUTERIZED GROUND BALANCING Naturally occurring minerals in soil look like metal to a metal detect...

Страница 17: ...duce a boing sound after passing over it making it difficult to know where it is located It will not have the sound and feel of a metal object GROUND BALANCING Reading the Display Most gold prospectin...

Страница 18: ...ts will be achieved by first performing the CoMPuTErIZED GrouND BALANCING procedure in All Metal Mode The ground balance setting achieved using CoMPuTErIZED GrouND BALANCING will carry over into this...

Страница 19: ...a hum volume and pitch of the hum increase with target strength The approximate target depth in inches will be indicated in the center of the screen The depth scale is calibrated to coin sized object...

Страница 20: ...T BE DETECTED Values from 20 to 49 will induce a LOW tone Values from 50 to 100 will induce V C O tones see p 25 OPERATING IN DISCRIMINATION MODE In Discrimination Mode pressing or will change two det...

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