Fisher M-Scope CZ-20 QuickSilver User manual

CZ-20 Quicksilver
Operating Manual
Deep Search, Body Mount, Target I.D. Metal Detector
FISHER RESEARCH LABORATORY

CONTENTS
About Your CZ-20 ....................................................................pg. 1
Condensed Operating Instructions .......................................pg. 3
Assembly ..................................................................................pg. 5
Setting Up..................................................................................pg. 6
For Land or Shallow Water .....................................................pg. 6
For Diving..................................................................................pg. 7
For Hipmounting ......................................................................pg. 8
Control Panel ...........................................................................pg. 9
Turn on Procedure ..................................................................pg. 10
Ground Balancing..................................................................pg. 10
Pushbutton ...............................................................................pg. 11
Bobbing ...................................................................................pg. 12
Search Modes.........................................................................pg. 14
Auto Tune.................................................................................pg. 14
Target-I.D. ................................................................................pg. 15
Chart ........................................................................................pg. 17
Searching on Land or in Shallow Water ..............................pg. 17
Searching Underwater ..........................................................pg. 19
Pinpointing...............................................................................pg. 20
Target Identification ............................................................... pg. 21
Target Recovery .....................................................................pg. 23
Recovery Tools .......................................................................pg. 24
False Signals ............................................................................ pg. 25
Operating Tips.........................................................................pg. 28
Battery Replacement.............................................................pg. 30
Maintenance ..........................................................................pg. 32
Five Ways to Preserve Treasure Hunting ..............................pg. 32
Treasure Hunters Code of Ethics ...........................................pg. 34
Where To Use Your Metal Detector In the U.S. ....................pg. 35
Specifications .........................................................................pg. 36
Accessories............................................................................. pg. 38
Service.....................................................................................pg. 39

1
ABOUT YOUR DETECTOR
Your CZ-20 QuickSilver is truly an all-purpose metal detector
engineered for land, beach, salt and fresh-water treasure
hunters. Here are some important built-in features:
1. Leakproof: Submersible to 250 feet, headphones
and all.
2. 3-Tone Target I.D.: A low tone for iron; a mid-tone
for pull tabs, foil and most gold rings; and a high
tone for U.S. coins, silver rings and some gold rings.
3.Visual Target Response: Two bright,red LED’s flash
over targets, varying in intensity according to
target signal strength.
4. Depth: Patented Fourier domain signal analysis.
Two deep-seeking, ground-compensating VLF
signals (one at 5 KHz and one at 15 KHz) provide
twice as much target information for accurate
analysis and identification.
5. Two Search Modes: A silent-running, slow-motion
target-I.D. mode and a hot, wide-scan autotune
mode for all-metal searching.
6. VCO No-Motion Pinpointing: Just push the
pinpoint button and the signal tone increases in
pitch and volume as the center of the coil
approaches the target.
7. Big-Target Alert: Ordinary detector circuits
overload on large, shallow targets, identifying them
as good targets. But not the CZ-20. A distinctive bell
tone immediately warns you that the target is too
large to identify.
8. Faint-Target Audio Boost: The lower range of the
volume control is like any other that you’ve used.
But as you increase it above mid-range, strong
target sounds remain at a fixed volume while faint,
deep-target sounds continue to get louder.
9. Pushbutton Ground Balance: Just push the
pinpoint button and lower the coil to the ground.
Then set the ground control just below the audio
tone and you are precisely tuned for on-site

ABOUT YOUR DETECTOR
2
conditions.
10. Separately Sealed Battery Compartment:
Protects the electronics from accidental flooding.
11. Spider Coils: Your choice of the all-purpose 8-
inch or deep-seeking 10 1/2-inch Spider coils. Light,
tough and with open centers for accurate
pinpointing. The hot, little 5-inch coil is great for
extremely trashy areas, tight spots or highly
mineralized ground.
12. Balanced, Comfortable and Hipmountable:
Cushioned arm rest, soft foam grip and a control
housing that slips off the handle and onto your belt.
13. Easy to Use: Just pick it up, set the control on
the red circles and start searching in a “coins-only”
mode. Or for maximum performance, you can
easily adjust the controls for your own specific
situation.
Read this instruction manual thoroughly, practice often and
you’re in for some exciting treasure hunting. Drop us a line if you
have any questions, comments or good finds to tell us about. In
the meantime . . .
Good Hunting,
Fisher Research Laboratory

3
CONDENSED OPERATING INSTRUCTIONS
Factory Pre-Set ‘Turn-On-and-Go’ Marks
Your CZ-20 QuickSilver is fairly simple to operate, especially
when compared to other target-I.D. machines. Even so, we
strongly recommend that your read this entire manual. You’ll
be able to tune your CZ-20 to your specific needs and
conditions. And if you have a good understanding of how to
do it and why, you’ll find more.
But if you just can’t wait any longer, and you’re an
experienced detector user, here’s some quick instructions to
get you going.
Factory pre-
set turn-on-
and-go
marks
(circled in
red on your
CZ-20 control
panel) can
get you up
and running
with your CZ-
20
immediately.
1. Set all the controls to the red “Turn-On-and-Go”
marks:
GROUND = 5
DISC = 4
SENSITIVITY = 3
VOLUME = 5
This puts you in a “coins-only” mode, and you’re
ready to start searching. Keep in mind that the
Pre-set
Audio
Boost
mark at
“5”
Pre-set
SENSITIVITY
mark at “3”
Pre-set
DISCRIMINATION
mark at “4”
Pre-set
GROUND
mark at “5”

4
GROUND setting of “5” is probably not the
optimum setting for the ground you’re searching,
and that’s why the sensitivity level is lowto
reduce false signals caused by ground
mineralization.
2. Adjust the volume control for a comfortable
volume when the coil is passed over a large,
shallow target.
3. Travel slowly, overlap your sweeps and keep
the search coil moving. Remember, you’re in a
“motion” search mode, and the coil must be
moving at least slightly to detect a target.
4. When you get a good, repeatable signal,
pinpoint the target by placing the coil on the
ground away from the target, pushing and
holding the pinpoint button and then bringing the
coil back over the target.
5. Good hunting!
CONDENSED OPERATING INSTRUCTIONS

5
ASSEMBLY
1. Remove the headphone, handle and search-
coil assemblies from the carrying case. Be careful
not to damage the foam-rubber inserts or put any
strain on the cable connections.
2. Adjust the lower stem to the approximate length
you will be using: extended for stand-up use or as
short as possible for diving. To extend the lower
stem, push in the spring lock, pull out the lower stem
and let the spring lock snap into another hole.
3. Unwind just enough cable to attach the search
coil to the lower stem.
4. Remove the bolt and wing nut from the search
coil. Line up the hole in the lower stem between
the two holes in the search coil “ears.” Attach the
coil to the stem with the bolt and wing nut and
finger tighten.
5. The arm rest may be repositioned for maximum
comfort by removing the arm-rest screws, sliding
the arm rest to the next screw hole and re-installing
the arm-rest screws.
Your Fisher CZ-20 QuickSilver is built to last for years.
Submersible
Adjustable arm rest
Control Housing
Control Panel
Target I.D.
Foam hand
7-foot Search Coil
Fiberglass upper
Arm-rest
Battery access 8-inch Spider
Nylon Wing nut
Fiberglass
reinforced
nylon lower
Headphone

6
SETTING UP FOR LAND OR SHALLOW WATER
Put the headphones around your neck to keep them out of the
way while making the following adjustments:
SETTING UP
ASSEMBLY
However, it’s a sophisticated electronic instrument
containing state-of-the-art components. Handle it
carefully, care for it regularly, and it will give you
years of dependable service. The CZ-20 requires
little assembly. Unpack it carefully and save the
carton; it comes in handy if you ever have to return
the instrument for service.
When searching on land
or in shallow water, keep
your arm straight and your
search coil no more than
2 inches above the
ground.
Adjustable Arm Rest
Scews
Screw Hole
Upper Stem

7
Control housing (Never hipmount your
control housing while diving.)
Shortened Stem length
Extra, coiled
cable
1. Adjust the stem length and coil angle so the
search coil rests flat on the ground about 6 inches
in front and slightly to the right of your foot (to the
left of your left foot if you’re left handed).
2. Leave enough slack in the coil cable to allow
the coil to swivel as far as it can in either direction.
The coil wing nut should be tight enough to prevent
the coil from moving.
3. You should now be able to move into your
“search” position by leaning slightly forward and
raising the search coil no more than 2 inches above
the ground. Your arm should still be straight, and
the coil should be parallel to the ground, about 12
inches in front of your foot. The coil angle may have
to be slightly readjusted at this point.
SETTING UP FOR DIVING
Unlike most VLF metal detectors, the CZ-20 works well in salt
water. This capability, along with its deep-seeking sensitivity,
makes it ideal for underwater treasure hunting and wreck diving.
TheCZ-20 iswaterproof toa depthof 250 feet. Remember, always
practice safe diving methods.
(Never hipmount your control housing while diving.)
When diving with your CZ-20, use the shortest stem length
possible, with the extra cable wrapped tightly around the stem,
as closely as possible to the control housing.
SETTING UP

8
1. Adjustthe stemlength asshort as youcan without
having the search coil detect your diving gear.
2. Adjust the search coil parallel to the sea bed,
river or lake bottom.
3. Make sure extra cable is coiled tightly on the
upper stem as closely as possible to the control
housing, with just enough slack near the search coil
to allow it to swivel as far as it can in either direction.
Too much loose cable near the search coil may
generate false signals.
4. Remove the tethered earphone plugs for rapid
pressure equalization as you dive and return to the
surface.
Caution: Hipmounting the CZ-20 control housing is not
recommended for underwater use. The search coil cable may
become entangled with a submerged object, making it difficult
for the diver to resurface quickly in case of emergency.
SETTING UP FOR HIPMOUNTING
For almost-effortless treasure hunting, the control housing is easily
removed from the handle and attached to a belt clip.
SETTING UP
You can hipmount your CZ-20 by sliding the control housing from the
handle and attaching it to your belt. This reduces the weight of the
stem, creating nearly effortless hunting.