Fisher Research Labs Pro-Arc Manual de usuario
Professional
Metal Detector
for the Archaeologist
USER’S MANUAL
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PRO-ARC Comprehensive Operating Manual & Guide to Metal Detecting
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The PRO-ARC is a professional-grade metal detector, designed specifically for the
Archaeological professional. It comes in a heavy duty travel case and includes
everything you will need on the dig site.
The best technology from the oldest company in the business, the PRO-ARC, by Fisher®!
PRODUCT FEATURES
• Lightweight and well-balanced: best ergonomically engineered detector in the
industry.
• Intuitive menu-driven user interface
• Large LCD screen
• Visual indicators of important values such as:
Target Identification
Target Confidence
Target Depth (both running-depth and pinpoint-depth) Ground Mineralization
• Multiple Search Modes:
Discrimination
Static All Metal
Motion All Metal
• Trigger-actuated FASTGRAB™ ground balancing with manual override
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Comprehensive Operating Manual & Guide to Metal Detecting PRO-ARC
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• Waterproof 11-inch open-frame BiAxial™ searchcoil
Housing constructed of a carbon fiber-polycarbonate blend
• Optional 5” BiAxial™ searchcoil
• Trigger-actuated target pinpointing with variable audio pitch
• Fully Adjustable Armrest
• Display backlight for night and low-light conditions
• Notch and discrimination controls
• Covers provided for both the control housing and battery box
• Durable travel hard case and battery charging kit
• Pin flags and Rite-in-Rain notebook
• Headphones
• Made in the USA
If you have any questions, or need assistance with your metal detector,
Call 1-915-225-0333, and ask for Fisher Hobby Technical Service
Copyright Fisher Research Labs, Inc., 2012
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PRO-ARC Comprehensive Operating Manual & Guide to Metal Detecting
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Table of Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9
Mechanicals
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-13
Mechanicals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-15
Armrest adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Using Headphones (included) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Introduction to the PRO-ARC
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-19
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-23
Menu System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24-25
Ground Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-31
Motion All Metal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32-33
Static All Metal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34-35
Discrimination Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36-45
PinPoint Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46-47
LCD Visual Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48-53
Numeric Target Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48-49
Probable Target Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49-50
Depth Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Confidence Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
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Fe3O4Graph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Battery Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Ground Balance (GB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Setting Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52-53
Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Frequency Shifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54-55
Capabilities & Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..56-61
Tips & Techniques
Search Techniques
How to sweep the searchcoil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62-63
Boost and Cache Locating Processes . . . . . . . . . . . . . . . . . . . . . . . . . . .63-65
Pinpointing targets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65-66
Estimating target size and depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66-68
False signals and chatter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68-70
Ground minerals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70-71
Hot Rocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71-72
Adjusting Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Tips on ground balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73-75
Shallow Water Hunting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Salt Water Hunting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
How metal detectors work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76-77
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back Page
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PRO-ARC Comprehensive Operating Manual & Guide to Metal Detecting
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Specifications
Mechanical: S-rod with electronics housing mounted on handgrip, 3-piece
breakdown, batteries under elbow, 2-way armrest adjustment -
forward/backward & around forearm.
Searchcoil: 11” (28 cm) open-frame elliptical double-D, waterproof.
Batteries: 4 AA, alkaline (included).
Weight: 3.5 pounds (1.6 kg) with alkaline batteries installed.
Static Balance: force in vertical plane normal to elbow 0.47 pounds (0.22
kg).Varies with adjustment and user's stance and arm/hand
physiology.
Dynamic Balance: axial moment, 0.29 foot-pounds (0.39 newton-meters). Varies with
adjustment and user's stance and arm/hand physiology.
Sweep Effort: lateral moment 5.2 foot-pounds (7.1 newton-meters).
Operating Principle: VLF induction balance
Operating Frequency: nominal 13 kHz, quartz crystal timing reference 13158Hz,
13100Hz, 1043Hz, 12987Hz, 12931Hz, 12876Hz, 12821Hz
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Comprehensive Operating Manual & Guide to Metal Detecting PRO-ARC
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Basic Sensitivity: 6 x 10 9 root Hertz (detectivity)
Lag Coefficient: 78 milliseconds
Reactive Overload: Approximately 10,000 micro-cgs units (volume susceptibility)
40,000 micro-cgs units with sensitivity < 30.
Resistive Overload: Approximately 1,200 micro-cgs units (volume susceptibility) 4,800
micro-cgs units with sensitivity < 30.
Ground Balancing Range: From ferrite to salt, inclusive
Discrimination
Ground Suppression: Combination of second and third order methods
ID Ground Suppression: Third order
Battery Life: Typically 40 hours with high quality alkaline batteries
Estimated 80 hours with nickel oxyhydroxide batteries
Estimated 65 hours with lithium iron disulfide batteries
Operating Temp Range: 4 to +122 degrees F (-20 to +50 degrees C)
Operating Humidity Range: 0-90% non-condensing
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PRO-ARC Comprehensive Operating Manual & Guide to Metal Detecting
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Quick Start
Use your PRO-ARC right out of the case
1. Assemble the detector (see instructions beginning page 10).
2. Install four AA alkaline batteries. All positive (button-end) terminals point up.
3. Turn the knob, located under the armrest, fully clockwise. This turns the machine on and
sets audio volume to maximum.
4. When first turned on, the PRO-ARC starts out in the Discrimination Mode, with:
Sensitivity preset to 60
Discrimination Level preset to 10
Number of Tones preset to 3
Process# preset to dE
Sweep the searchcoil from side to side, parallel to the ground. Keep the searchcoil
moving over the ground. If you stop moving the searchcoil, the sound will also stop.
Probable target type will be indicated at the top of the LCD screen.
5. If the searchcoil is not in motion and not close to metal, the detector should be silent.
6. If you experience false signals from electrical interference, from the soil itself, or from lots
of trash metal, press the MENU button.
Sensitivity will be highlighted.
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Comprehensive Operating Manual & Guide to Metal Detecting PRO-ARC
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Quick Start (continued)
Rotate the Settings knob to the left (counterclockwise),
Reduce the sensitivity setting until the false signals go away.
After 7 seconds, the machine will exit the menu and return to normal operation.
7. Find a patch of ground free of metal, toss a coin on the ground and sweep back and forth
over it a few times to get a feel for how the machine responds.
8. You are now ready to search.
9. Pull and hold the trigger switch with your index finger to pinpoint the exact location of
targets, making them easier to unearth.
When the trigger is pulled, PinPoint is engaged ….
The searchcoil need not be in motion to detect an object.
The 2-digit numeric display indicates approximate target depth, in inches.
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PRO-ARC Comprehensive Operating Manual & Guide to Metal Detecting
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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 S-rod (S-rod holds detector body).
Turn top locking collar counterclockwise to open up. Push in pin on small rod. Slide
small rod into upper rod. Click pin into hole and tighten locking collar firmly clockwise.
4. Push lower rod into small rod as follows:
Turn locking collar counterclockwise to open up. If plastic insert tab interferes, push it
down, or turn tube upside down. Push in pin to allow rod to slide in. Slide lower rod in.
Click pin into any hole.
5. Remove Velcro strip from lower rod.
6. Wrap cable around stem as follows:
Leave some slack in cable at base of lower rod. Secure cable at base of rod with Velcro
strip. Wrap cable loosely around entire stem up to bent part of upper rod. You will re-wrap
the cable later after sizing the rods to your height.
7. Push cable into connector on back of housing.
Do not twist the cable or plug.
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