Manual

CONTENTS
About Your Gemini-3 ............................................................... pg. 3
Basic Theory of Operation ....................................................... pg. 4
Depth ......................................................................................... pg. 5
Transmitter ................................................................................. pg. 6
Receiver .................................................................................... pg. 7
Searching............................................................................... pg. 8
Narrow Scan Inductive Search ............................................... pg. 8
Set Up -Narrow Scan Inductive Search .............................. pg. 8
Tuning -Narrow Scan Inductive Search .............................. pg. 9
Operation -Narrow Scan Inductive Search ........................ pg. 10
Wide Scan Inductive Search ................................................... pg. 12
Set Up -Wide Scan Inductive Search .................................. pg. 12
Tuning -Wide Scan Inductive Search .................................. pg. 12
Operation -Wide Scan Inductive Search ........................... pg. 13
Tracing ....................................................................................... pg. 14
Inductive Tracing .................................................................. pg. 14
Set Up -Inductive Trace ........................................................ pg. 14
Tuning -Inductive Trace ........................................................ pg. 14
Operation -Inductive Trace ................................................. pg. 15
Conductive Trace ..................................................................... pg. 15
Set Up -Conductive Trace .................................................... pg. 15
Tuning -Conductive Trace ................................................... pg. 16
Operation -Conductive Trace ............................................. pg. 16
Prospecting Tips ........................................................................ pg. 17
Mapping ................................................................................ pg. 17
Locating Placer Deposits ...................................................... pg. 17
Sources of Error...................................................................... pg. 18
Battery Replacement ............................................................... pg. 19
Treasure Hunters’ Code Of Ethics ............................................ pg. 20
Where To Use Your Metal Detector In The U.S. ...................... pg. 21
Specications ........................................................................... pg. 22
Using Headphones ................................................................... pg. 23
23
Notes
1. Subject to improvement or modication without notice.
2. Approximate.
3. Voltage Controlled Oscillator. Volume and pitch
both increase as target is approached for easier, more
accurate pinpointing.
4. With optional ground plate assembly.
5. Optional stereo/mono headphones.
6. Use of headphones will signicantly increase battery life.
Fisher Research Laboratory does not warrant suitability to
specic use. Fisher Research Laboratory shall in no event be
liable for any direct, incidental, consequential or indirect
damages.
SPECIFICATIONS
Using headphones (not supplied) improves battery life, and
prevents the sounds from annoying bystanders.
It also allows you to hear subtle changes in the sound more
clearly, particularly if searching in a noisy location. For safety
reasons, do not use headphones near trafc or where
other dangers are present. This device is to be used with
interconnecting cables/headphone cables shorter than three
meters.
USING HEADPHONES