Fisher CZ 21.pdf

CZ-21 QuickSilver

Deep Search, Land and Underwater, Target I.D. Metal Detector

Operating Manual

F I S H E R R E S E A R C H L A B S

CONTENTS

About Your Detector ..............................................................pg. 1

Condensed Operating Instructions ......................................pg. 3

Headphones ...........................................................................pg. 4

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. 10

Turn on Procedure ..................................................................pg. 11

Ground Balancing ..................................................................pg. 11

Touch Pad ............................................................................pg. 12

Bobbing................................................................................pg. 13

Search Modes.........................................................................pg. 15

Auto Tune.............................................................................pg. 15

Target I.D..............................................................................pg. 16

Searching on Land or in Shallow Water ...............................pg. 18

Searching Underwater ...........................................................pg. 21

Pinpointing ..............................................................................pg. 22

Target Identiication ...............................................................pg. 23

Target Recovery .....................................................................pg. 27

Recovery Tools........................................................................pg. 28

False Signals............................................................................pg. 29

Battery Replacement .............................................................pg. 33

Maintenance ..........................................................................pg. 35

Battery Door Gasket: Orientation .........................................pg. 36

Where To Use Your Metal Detector In the U.S. .....................pg. 37

Speciications .........................................................................pg. 38

Treasure Hunters’ Code of Ethics ..........................................pg. 40

ABOUT YOUR DETECTOR

Your CZ-21 QuickSilver is an all-purpose metal detector

engineered for land, beach, salt and fresh-water treasure hunters.

Here are some important features:

1. Leakproof: Submersible to 250 feet.

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. 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

identiication.

4. Two Search Modes: A silent running, slow motion

target I.D. mode and a hot, autotune mode for all-

metal searching.

5. VCO No-Motion Pinpointing: Tap the pinpoint button

and the audio tone increases in pitch and volume

as the center of the coil approaches the target.

6. Big-Target Alert: The CZ-21 circuits may overload

on large, shallow targets. A distinctive bell tone

immediately warns you that the target is too large

to identify.

7. Faint-Target Audio Boost: As you increase the volume

level past “5”, strong target sounds remain at a ixed

volume while faint, deep-target sounds continue to

get louder.

8. Quick Manual Ground Balance: Tap 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 conditions.

9. Separately Sealed Battery Compartment: Protects

the electronics from accidental looding.

ABOUT YOUR DETECTOR

10. Search Coils: The CZ-21 comes with the 8” coil as

standard equipment, but can also be custom

ordered with the 10” coil. All coils are permanently

attached.

11. Balanced, Comfortable and Hipmountable: Cushioned

arm rest, soft foam grip and a control housing that

slips off the handle and onto your belt.

12. Salt Water Compensation: Salt water is electrically

conductive, and therefore induces a strong

signal in the searchcoil. Unlike most other metal

detectors, the CZ-21 uses Fourier Domain signal

analysis to cancel the salt water signal. Under most

conditions you will not experience any false signals

from salt water. When working in the surf zone at

high sensitivity settings you may hear an occasional

“whisper” which is easily ignored.

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, adjust the controls

for your own speciic 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 inds to tell us about. In

the meantime . . .

Happy Hunting,

Fisher Research Labs

CONDENSED OPERATING INSTRUCTIONS

Factory Pre-Set “Turn-On-and-Go” Marks

Your CZ-21 QuickSilver is simple to operate. Even so, we strongly

recommend that you read this entire manual. You’ll be able to

tune your CZ-21 to your speciic needs and conditions.

Figure 1. Factory pre-set turn-on-and-go marks (circled in red or

blue on your CZ-21 control panel) can get you up and running

immediately.

Pre-set Audio

Boost mark

at “5”

Salt-water Pre-set

SENSITIVITY at “3”

Fresh-

water

sensitivity

Pre-set

at “7”

Pre-set

DISCRIMINATION

at “4”

Pre-set

GROUND at “5”

1. Set all the controls to the red “Turn-On-and-Go”

pre-set:

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 GROUND

setting of “5” is probably not the optimum setting

for the ground you’re searching. The sensitivity level

is set low to reduce false signals caused by ground

mineralization.

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