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33

Comprehensive Operating Manual & Guide to Metal Detecting 

PRO-ARC 

22

PRO-ARC

Comprehensive Operating Manual & Guide to Metal Detecting

31

Ground Balancing (continued)

that when the searchcoil is lowered to the ground in PinPoint, Stat or Motion All Metal Mode,
the sound will get louder as the searchcoil approaches the ground. The sound will grow
quieter as the searchcoil is raised. What, if anything, you will hear in Discrimination Mode
depends on the Discrimination setting. 

When searching in an All Metal Mode, if ground balance is properly set to cancel the ground,
and you sweep over a positive hot rock, the rock will give a “zip” sound similar to that of a
metal object. 

NEGATIVE RESPONSE
If the GB setting is too low a number, the response of minerals will be negative. When the
searchcoil is lowered to the ground in PinPoint, Stat or Motion All Metal Mode, the machine
will be silent. The machine will sound off as the searchcoil is lifted away from the ground.
What, if anything, you hear in Discrimination Mode depends on the Discrimination setting. 

When searching in Motion All Metal Mode, a negative hot rock will produce 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.

50

LCD Visual Display (continued)

Most gold jewelry is small, and will tend to read in the 16-55 range. Silver jewelry usually has
more metal in it and therefore tends to produce higher readings.

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.

DEPTH 
When the trigger is pulled to facilitate pinpointing an object, the 2-digit numerical display
indicates the approximate depth of the object, in inches, based on the assumption that the
object is a typical U.S. coin. Small objects will read deeper than they actually are, and large
objects will usually read shallower than they actually are. 

The DEPTH bar graph on the left of the display divides target depth into shallow, medium and
deep. This depth range appears while searching, and is less accurate than the value derived
using the pinpoint toggle switch.
Bar graph ranges for a coin-sized object are Shallow (0-4inches), Medium (4-8 inches) and
Deep (8). 

CONF (Target Confidence Indicator) 
This 6-segment graphic indicates how confident the detector is of the 2-digit target
identification it has assigned. If all 6 segments are displayed, you can be confident that the 

33

Comprehensive Operating Manual & Guide to Metal Detecting 

PRO-ARC 

22

PRO-ARC

Comprehensive Operating Manual & Guide to Metal Detecting

31

Ground Balancing (continued)

that when the searchcoil is lowered to the ground in PinPoint, Stat or Motion All Metal Mode,
the sound will get louder as the searchcoil approaches the ground. The sound will grow
quieter as the searchcoil is raised. What, if anything, you will hear in Discrimination Mode
depends on the Discrimination setting. 

When searching in an All Metal Mode, if ground balance is properly set to cancel the ground,
and you sweep over a positive hot rock, the rock will give a “zip” sound similar to that of a
metal object. 

NEGATIVE RESPONSE
If the GB setting is too low a number, the response of minerals will be negative. When the
searchcoil is lowered to the ground in PinPoint, Stat or Motion All Metal Mode, the machine
will be silent. The machine will sound off as the searchcoil is lifted away from the ground.
What, if anything, you hear in Discrimination Mode depends on the Discrimination setting. 

When searching in Motion All Metal Mode, a negative hot rock will produce 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.

50

LCD Visual Display (continued)

Most gold jewelry is small, and will tend to read in the 16-55 range. Silver jewelry usually has
more metal in it and therefore tends to produce higher readings.

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.

DEPTH 
When the trigger is pulled to facilitate pinpointing an object, the 2-digit numerical display
indicates the approximate depth of the object, in inches, based on the assumption that the
object is a typical U.S. coin. Small objects will read deeper than they actually are, and large
objects will usually read shallower than they actually are. 

The DEPTH bar graph on the left of the display divides target depth into shallow, medium and
deep. This depth range appears while searching, and is less accurate than the value derived
using the pinpoint toggle switch.
Bar graph ranges for a coin-sized object are Shallow (0-4inches), Medium (4-8 inches) and
Deep (8). 

CONF (Target Confidence Indicator) 
This 6-segment graphic indicates how confident the detector is of the 2-digit target
identification it has assigned. If all 6 segments are displayed, you can be confident that the 

Summary of Contents for Pro-Arc

Page 1: ...Strap not shown Specially made to fit the arm cuff of your PRO ARC ARMSTRAP75 MPROARC Rev 2 051413 PRO ARC Comprehensive Operating Manual Guide to Metal Detecting FOR COMPLETE DETAILS VISIT WWW FISHE...

Page 2: ...n Static All Metal Motion All Metal Trigger actuated FASTGRAB ground balancing with manual override 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 3: ...earch Labs Inc 1465 H Henry Brennan Dr El Paso TX 79936 Phone 915 225 0333 ext 118 Fax 915 225 0336 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 4: ...entification 48 49 Probable Target Identification 49 50 Depth Indicators 50 Confidence Indicator 51 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 5: ...to determine the changes which occur as the search coil sweeps over the target and then convey the 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 6: ...minal 13 kHz quartz crystal timing reference 13158Hz 13100Hz 1043Hz 12987Hz 12931Hz 12876Hz 12821Hz 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 7: ...more highly weathered oxidized or finely grained the soil is the lower the numeric reading will be 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 8: ...m the soil itself or from lots of trash metal press the MENU button Sensitivity will be highlighted 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 9: ...ot quiet them all In that case you can revert to the rule of thumb don t dig non repeatable signals 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 10: ...e rods to your height 7 Push cable into connector on back of housing Do not twist the cable or plug 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 11: ...they are metal Ocean beaches have salt water that subject is discussed toward the end of the manual 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 12: ...ollar Locking Collar Velcro Strap Velcro Strap Cable Plug Middle Stem Lower Stem Assembly continued 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 13: ...there is nothing there There are five major causes for this electrical interference nuisance buried 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 14: ...alled with the positive terminals facing upward The LCD screen shows battery condition on the right 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 15: ...llow This technique works well in the All Metal modes and to a lesser extent in Discrimination Mode 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 16: ...e armrest in or out accordingly Adjust the armrest forward or back to adapt to your arm s length 16 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC PRO ARC Comprehensive Operating M...

Page 17: ...le back to dE process Press and Hold the MENU button to temporarily engage the dE process For users 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 18: ...kaline batteries which will typically last for more than 40 hours of use before needing replacement 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 19: ...gets can cause signal overload indicated by the siren sound In these instances raise WRONG RIGHT 62 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC PRO ARC Comprehensive Operating M...

Page 20: ...ion Trigger switch Settings Knob Menu Access Toggle From bP or CL Process DUAL FUNCTION MENU BUTTON 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 21: ...ent readings unless it is right next to an iron object A steel bottle cap that is at least 3 inches 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 22: ...not change when the SETTINGS knob is rotated press the MENU button to reactivate the user interface 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 23: ...away from any large masses of metal including the reinforcing steel usually present in concrete If 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 24: ...in the middle of the display and the present setting of that function will be displayed as a number 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 25: ...notable exceptions are gold which usually reads low because it is rarely found in large pieces and Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operating M...

Page 26: ...FASTGRAB will not automatically balance over highly conductive soils such as a wet salt water beach 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 27: ...ncy This is a trial and error method to try to find a frequency different from the suspected source 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 28: ...on the LCD indicates the type of ground mineralization Some typical ground mineralization types are 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 29: ...h overloads will not harm the detector but the detector will not detect metals properly under these 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 30: ...ESPONSE If the GB setting is too high a number the response of minerals will be positive This means 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 31: ...target identification it has assigned If all 6 segments are displayed you can be confident that the 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 32: ...e of electrical interference high ground mineralization or variable ground mineralization operation 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 33: ...ron objects 4 12 Foil from gum wrapper 16 25 U S nickel 5 coin Typically 30 Aluminum pull tab 33 55 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 34: ...slight amount of ground response If you do not hear these noises you will sacrifice detection depth 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 35: ...the target then pull the trigger and raise the searchcoil slightly while passing it over the target 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 36: ...there is no interaction between the sensitivity settings of the All Metal and Discrimination Modes 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 37: ...d the response characteristics of the Motion All Metal Mode are also modified these characteristics 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 38: ...Toggle Switch c Turn detector on while continuing to hold MENU and Toggle d Release Menu and Toggle 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 39: ...tone whose pitch varies in relation to the visual ID number the higher the ID the higher the pitch 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

Page 40: ...ing which values to include or exclude from detection Beware that this combination can be confusing 33 Comprehensive Operating Manual Guide to Metal Detecting PRO ARC 22 PRO ARC Comprehensive Operatin...

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