Instruction/ maintenance manual of the product GEMINI-3 Fisher
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FISHER RESEARCH LABORATORY 200 W est Willmott Road Los Banos, Califor nia 93635 T el 209.826.3292 Fax 209.826.0416 www.sherlab.com email:info@sherlab.com QUALITY Fisher detectors are renowned for their quality. Each detector is hand crafted in the USA with pride.
CONTENTS About Your Gemini-3 ............................................................... pg. 3 Basic Theory of Operation ....................................................... pg. 4 Depth ..........................................................
3 ABOUT YOUR DETECTOR Two-box metal detectors have long been used by prospectors, geologists, treasure hunters and public utility companies to locate large, deep objects, ore vein, pipes and cables.
4 BASIC THEORY OF OPERATION The GEMINI-3 was engineered to detect conductivity ch ang es i n th e e a rt h ov e r w hi ch i t is ca r ri e d. H en c e , a po s it i ve re spo nse by th e GE M IN I -3 in d i ca t es the pr e s en c e of a metal object, ore vein or mineral that is more conductive than the surrounding rock or soil.
5 DEPTH The GEMINI-3 was designed to locate large, deep objects such as an iron chest, pipe or an ore vein. It will not detect small coin- sized objects. A quart jar full of coins, however , may be detected one-to-three feet deep. A 55-gallon drum may be detected as deep as 10 feet.
TRANSMITTER Battery Level Meter Power Switch Ground Plate Jack Figure 2. Transmitter Power Switch: Pull out switch turns on power . Ground Plate Jack: Use d with the opt ional Ground Plate Assem bly for the Conductive T race Mode. Battery Level Meter: Gives a visual indication of battery strength.
RECEIVER Speaker: Provides audible indication of the receiver signal for balancing and detecting. Met er: Prov ides vis ual indi cati on of th e Receiv er signa l r espo nse for balancing and detecting. Also used as a battery test indicator . Sensitivity Control: Used to control sensitivity level.
8 SEARCHING Narrow Scan Inductive Search This mode of operation is per for med by a single operator using the 3-piece handle. It is the best method for locating small or short objects (chest, coin-jar , rie, etc.). However , it is also an effective way to locate pipes, cables and ore veins.
9 Tuning 1 . Set th e t ran smi tte r: P owe r: ON 2. Se t t he Rec eiv er: Pow er: ON Sen sit ivi ty: 7 Y ou should get a strong audio to ne and meter ind ica tio n a t t his po int .
10 SEARCHING 7. Y ou are rea dy to sear ch wh en the B ALA NCE kn ob is adju sted wit hin the 1/8 - to 1/4-turn sile nce (nul l) spa ce. This is ext re mel y impo rta nt! If this pr oce dur e is not f.
11 SEARCHING 5 . For eve n more accur ate pinpo int ing of short objec ts, (i. e., a pip e, cable , etc .) appr oac h the tes t obj ect at r igh t ang les fro m you r pr evi ous dir ect ion . Mar k the gr oun d as you did bef ore . Y our te st ob jec t shou ld be abo ut cen ter ed be twe en fou r m ark s.
12 SEARCHING Wide Scan Inductive Search This mode of op era tio n is the pr ef err ed me tho d for sea rc hin g a lar ge ar ea quic kly . Two o per ato rs ar e re qui red an d t he han dle as sem bly is no t u sed . The Wid e Sca n In duc tiv e Sea rch mod e is pr act ica l only when sear ching for ore veins , pipes or cable 40 feet long or mor e.
An important point after buying a device Fisher GEMINI-3 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Fisher GEMINI-3 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Fisher GEMINI-3 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Fisher GEMINI-3 you will learn all the available features of the product, as well as information on its operation. The information that you get Fisher GEMINI-3 will certainly help you make a decision on the purchase.
If you already are a holder of Fisher GEMINI-3, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Fisher GEMINI-3.
However, one of the most important roles played by the user manual is to help in solving problems with Fisher GEMINI-3. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Fisher GEMINI-3 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
