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19

Comprehensive Operating Manual & Guide to Metal Detecting 

PRO-TECH 

OPERATING IN DISCRIMINATION MODE (continued)

Sweeping the Searchcoil

As you sweep the searchcoil over the ground, try to keep the coil parallel to the ground.
Avoid lifting the searchcoil at the end of your sweeps.

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 and very small objects can be difficult to see
in the loose dirt. 

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. 

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. Silver and copper metals are to the far right.

SIGNAL

Each time a target is detected, bars will illuminate 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.

Operating in Discrimination Mode continued on next page

18

PRO-TECH

Comprehensive Operating Manual & Guide to Metal Detecting

Operating in Discrimination Mode

Discrimination is used to eliminate trash metal objects (e.g. nails, foil, pull-tabs) from
detection. The searchcoil must be in motion to detect metal.  The Discrimination
Mode is less sensitive to small and deep objects than the All Metal Mode.

Ground Grab

®

(GG) Computerized Ground Balancing

This feature is not available in Discrimination Mode.
Your best results will be achieved by first performing the GG procedure in All Metal Mode.
The ground balance setting achieved using GG will carry over into the Discrimination Mode.

Setting the Controls

As you adjust any of the controls, notice that the values on the bottom-right of the
display indicate the settings of the value you are changing.

GAIN

If you are new to metal detecting, start with the GAIN at a low enough setting that
you do not hear any sounds when the searchcoil is sweeping across the ground, with
no metal present.
Start with GAIN at the 12:00 position, or less. 
In this mode, Gain refers to the detector's sensitivity. The higher the setting, the deeper
objects can be found, and the more sensitive the detector is to very small metal objects.

MODE

The right knob is not used in the Discrimination Mode.
Click the right knob 100% counterclockwise.
When you turn the knob to the right, you will leave Discrimination Mode, entering All
Metal Mode.

DISC LEVEL

Press + to eliminate unwanted metals from detection.
Each time you press + the Disc Value at the bottom-right of the display will increment by one.
Press-and-hold + to increase the Discrimination level rapidly.
See the Target Identification section of the manual for a detailed description of this function.
Sections of the arc with no indication represent metals completely eliminated from detection.
Sections of the arc with a lightly shaded indication represent metals detected with a low tone.
Sections of the arc with a bold indication represents metals detected with a high tone.
Press - to detect metals which were previously eliminated from detection.

Unwanted Noise

Read the section on Electrical Interference.
This is a highly sensitive device.
It is intended for use outdoors. Indoor operation will subject it to electrical
interference from a wide variety of devices in the home or office.
In Discrimination Mode, when you sweep the coil over the ground it will usually be
quieter than when holding the detector still.

Содержание PRO-TECH

Страница 1: ...Professional Metal Detector For the Archaeologist USER S MANUAL 0714...

Страница 2: ...tor 2 Do not use indoors This detector is for outdoor use only Many household appliances emit electromagnetic energy which can interfere with the detector If conducting an indoor demonstration turn th...

Страница 3: ...int 15 and 15 Operating in All Metal Mode Ground Grab GG Computerized Ground Balancing 16 Setting the Controls 16 Unwanted Noise 16 Sweeping the Searchcoil 16 Reading the Display 17 Target Scale 17 Op...

Страница 4: ...d methods as you become more proficient in the field The new PRO TECH is unique among professional metal detectors for its combination of high sensitivity to small targets and its versatile function a...

Страница 5: ...pipes bolts and nails In most Dig Site situations you will want to recover all of the metal targets including the iron Ferrous Metals which are made of or contain iron Pinpointing Pinpointing is the p...

Страница 6: ...oved from the aluminum tube Armrest Strap The PRO TECH comes with an armrest strap for users who prefer to swing the detector vigorously in order to hold the detector securely against the arm The dete...

Страница 7: ...the ground in front of you 10 Wind the CABLE securely around the STEMS 11 Connect CABLE PLUG to housing Do not twist the Cable or Plug Turn Locking Ring only Use minimal finger pressure to start the...

Страница 8: ...rtment Battery Life Expect about 15 to 20 hours of life from a 9 volt alkaline battery Rechargeable batteries can provide up to 8 hours of usage per charge Speaker Volume and Battery Charge You may no...

Страница 9: ...12 00 position for this demonstration 4 Click the right knob to the left to the DISC setting 5 a Wave the nail over the searchcoil b Press repeatedly while continuing to wave the nail Notice the chan...

Страница 10: ...t low settings you will hear no sound ii at mid scale there will be a transition point from no sound to a barely audible choppy sound iii at full scale you will hear a loud constant tone It may also h...

Страница 11: ...d with these things in mind 1 Ground Minerals All soils contain minerals Signals from ground minerals can interfere with the signals from metal objects you want to find All soils differ and can differ...

Страница 12: ...te depth reading is available using PINPOINT Pinpoint displays target depth in inches The Pinpoint Mode does not require the searchcoil to be in motion to detect metals The ability to hold the searchc...

Страница 13: ...and hold to enter no motion PINPOINT Mode In ALL METAL Mode press and hold while bobbing coil to set ground balance In DISC Mode Change discrimination level from 0 to 80 In ALL METAL Mode Change Groun...

Страница 14: ...s your current sensitivity setting Sensitivity in DISC Mode The left knob is labeled GAIN and in DISCRIMINATION Mode it alone controls the sensitivity of the detector GAIN in ALL METAL Mode In All Met...

Страница 15: ...in if necessary Silent searching will result in the loss of some sensitivity TOUCHPAD CONTROLS 1 GG PINPOINT This button has a dual function depending on the detection mode a In DISC Mode press and ho...

Страница 16: ...e you search Refer to the Ground Balancing section pg 22 of this manual for a more in depth description Setting the Controls As you adjust any of the controls notice that the values on the bottom righ...

Страница 17: ...e best starting point for achieving the correct setting After you perform the Ground Grab procedure the GND BAL number will change to match your soil You can change the current GND BAL setting by pres...

Страница 18: ...sensitivity The higher the setting the deeper objects can be found and the more sensitive the detector is to very small metal objects MODE The right knob is not used in the Discrimination Mode Click...

Страница 19: ...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 and ve...

Страница 20: ...states 1 Blank no segments displayed 2 Grey segments displayed in a shaded color 3 Black segments are solid black The segments along the arc will remain illuminated in this state as you are pressing...

Страница 21: ...O audio Represented by solid segments at DISC value 80 All detected targets induce HIGH tones Represented by solid segments There are no LOW tones No targets under 80 are detected Here is an example...

Страница 22: ...nd more accurate target identification How to Ground Balance your detector Ground Balancing procedure with the GG touchpad 1 Turn the detector on and set GAIN at the 12 00 position 2 Click on the righ...

Страница 23: ...ASE is the measurement of the ground GND BAL is the detector s internal setting which calibrates the detector to the ground s phase Notice that the GND BAL number is three digits with a decimal point...

Страница 24: ...ing is to adjust the metal detector to ignore ground minerals If the setting is incorrect ground minerals will give either a positive or a negative response depending on which direction the adjustment...

Страница 25: ...agnetic susceptibility is expressed in micro cgs units In a saltwater environment in the absence of iron minerals the bar graph indicates relative electrical conductivity In soils with greater than 10...

Страница 26: ...e the low tone and which will be eliminated All targets audio responses in All Metal Mode will be V C O V C O Voltage Controlled Oscillator is an audio response which provides a good feel for the targ...

Страница 27: ...at their ground balance value is a number lower than the soil they are found in They are usually but not always drawn to a magnet They are most often reddish in color but are often black brown or yell...

Страница 28: ...ct metal detectors Overall the potential for electrical interference is greater than it was just a few years ago Modern high end metal detectors are a lot more sensitive than older units this also inc...

Страница 29: ...e with severe electrical interference a small searchcoil is often a better choice than a large one Distinguishing electrical interference from other problems Electrical interference will often vary as...

Страница 30: ...irregularly shaped object If the tone completely disappears at different angles the target may be trash or a low value metal If you are new to metal detecting dig all targets With practice in the fie...

Страница 31: ...cate it by the sound The target is located directly under where the sound is loudest Narrow It Down 1 To narrow the response further position the center of the searchcoil near the center of the respon...

Страница 32: ...1 inch widescan searchcoil Batteries Single 9 volt rectangular alkaline battery included Operating principle VLF induction balance Operating frequency 19 kHz crystal controlled Reactive overload 10 00...

Страница 33: ...Labs for a Return Authorization RA Number Reference the RA number on your package and return the detector within 15 days of calling to Fisher Research Labs Inc 1465 Henry Brennan Dr El Paso TX 79936 P...

Страница 34: ...Ta Intr Term Ass Bat Qui Hea Bas Ope Con Ope Ope Gro Targ Hot Ele Sea Targ Dev Wa Acc 34 PRO TECH Comprehensive Operating Manual Guide to Metal Detecting...

Страница 35: ...35 Comprehensive Operating Manual Guide to Metal Detecting PRO TECH...

Страница 36: ...ool Comes with a durable sheath 12 in length with a 7 serrated blade LESCHE KNIFE Coil Covers Specially made to protect your coil from abrasion and damage 11 DD Ellipse Accessory Coil Cover COVER 11DD...

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