Fisher CZ-21 QuickSilver User Manual

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 Identication ...............................................................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

Specications .........................................................................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:

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

identication.

4. Two Search Modes: A silent running, slow motion target I.D. mode and a hot, autotune mode for allmetal 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 xed

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 ooding.

Patented Fourier domain signal analysis. Two

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 s t rong 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 specic 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 nds 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 specic 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”

Pre-set DISCRIMINATION at “4”

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.

Salt-water Pre-set

SENSITIVITY at “3”

Freshwater sensitivity Pre-set at “7”

Pre-set

GROUND at “5”

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 in motion to detect a target.

4. When you get a good, repeatable signal, pinpoint the target.

CONDENSED OPERATING INSTRUCTIONS

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

ASSEMBLY

Submersible Headphones

Control Housing

Target I.D. Decal

Foam Hand Grip

7-foot Search Coil Cable

Fiberglass Upper Stem

Arm-rest Screw

Battery Access Panel

8-inch Spider

coil

Nylon

Wing Nut

Fiberglass Reinforced

Nylon Lower Stem

Headphone

Plug

Adjustable Arm Rest

Your Fisher CZ-21 requires little assembly. Handle it carefully, care for it regularly, and it will give you years of dependable service.

1. Remove the headphone, handle and search coil assemblies from the box. Be careful not to 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 nger tighten.

5. The arm rest may be repositioned for maximum comfort by removing the arm-rest screw, sliding the arm rest to the next screw hole and re-inserting the arm-rest screw.

Control Panel

Figure 2. CZ-21 Quicksilver Detector.

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:

1. Adjust the stem length and coil angle so the search

coil rests at 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.

SETTING UP

ASSEMBLY

Figure 4.

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

Figure 3.

Screw

Hole

Upper Stem

Control housing

Shortened stem length

Extra, coiled cable

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-21 works well in salt water. This capability, along with its deep-seeking sensitivity, makes it

ideal for underwater treasure hunting and wreck diving. The CZ-21 is waterproof to a depth of 250 feet. Remember, always practice safe diving methods.

When diving with your CZ-21, use the shortest stem length possible, with the extra cable wrapped tightly around the stem, as closely as possible to the control housing. Never hipmount your control housing while diving.

Adjust the stem length as short as you can 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.

SETTING UP

Figure 5.

Cauti on : H ip mo u nt in g the CZ-21 cont ro l h ou s in g is not recommended for underwater use. The search coil cable may become entangled with a submerged object, making it difcult for the diver to resurface quickly in case of emergency.

SETTING UP FOR HIPMOUNTING

For nearly-effortless treasure hunting, the control housing is easily removed from the handle and attached to the belt clip (included).

INSTRUCTION FOR REMOVAL OF CZ-21 FROM HANDLE

WARNING DO NOT DO THIS

Do not push on unit from the back (battery side.). Doing this will

most likely cause unit to release suddenly and y off, impacting on the control knobs on the oor, and damaging the unit.

THIS TYPE OF DAMAGE WILL VOID YOUR WARRANTY

SETTING UP

Figure 6. You can hipmount your CZ-21 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.

Hold unit rmly and separate handle, being careful not to drop

the control unit and damage it. Place unit battery side down with

battery cover on table top, or a at stable surface and grasp the unit rmly in one hand and the handle grip rmly in the other.

“Hipmounting” the CZ-21 in this manner takes about half the weight off the handle and allows the land or shallow-water treasure hunter to search much longer without arm fatigue.

1. Slide the belt clip into grooves on the bottom of the

control housing. This is a snug t, and you’ll have to

bend the clip slightly.

2. Unwrap just enough of the coil cable to allow for searching.

3. Slip the control housing onto your belt, left side for right handers, right side for left handers.

NOTE: Because of the extreme sensitivity of the CZ-21 search coil, hipmounting the control housing may produce a false signal when the search coil reaches the end of its arc (on the side that the control box is attached to your belt). Depending on your stem length and how high you have the housing hipmounted, the search coil may actually detect the housing.

WARRANTY NOTICE:

Damage to coil cable at housing connection is not warrantable if damaged by excessive force. If hipmounting, please leave slack in the cable so as not to yank the cable from the housing at the end of your sweep.

SETTING UP

CONTROL PANEL

1. VOLUME/OFF: Power on-off and volume control.

Volume is gradually increased from 1-5 settings. From 5-10, loud-target response is held constant while faint targets continue to get louder.

DISC: In the 0-6 positions, the CZ-21 is in the target I.D.

mode, which is a silent, no-threshold, motion-discrimination mode of operation with the ability to identify and then ignore (“reject”) or accept many kinds of small metal targets. In the AUTOTUNE position, the CZ-21 is in an allmetal mode. In this mode, the CZ-21 has a slightly wider and deeper search pattern, however, it lacks the ability to discriminate or identify and reject targets.

3. GROUND:

ground mineralization. Proper use of this control will minimize false ground signals and ensure that the CZ-21 is operating at its maximum potential in just about any ground condition including wet ocean sand.

4. SENS (Sensitivity)/BATT TEST: SENSITIVITY: The higher the setting, the more sensitive

the detector. Start at lower sensitivity setting until you gain experience with the detector. l is the suggested default setting for salt water hunting. p is suggested for fresh water.

BATT TEST: To test batteries

1. Reduce volume to low level

2. Put on headphones

3. Rotate SENS knob to BATT TEST position

4. Rotate VOLUME knob to increase volume As you rotate to “10” the volume and tone will indicate

Used to electronically cancel the effects of

Figure 7.

Control Panel

CONTROL PANEL

battery strength.

GOOD BATTERIES: Loud, high pitched tone

WEAK BATTERIES: Soft, low pitched tone or “ticking” sound BATTERIES NEED REPLACING: No tone During use, the speaker volume will fade and become

nearly inaudible before the detector performance is compromised by weak batteries.

5. PINPOINT: Activating the PINPOINT feature with the center-

positioned button enters a NO-MOTION detection mode. In this mode of operation, the detector will emit a monotone

hum whenever metal enters the coil’s eld of detection.

To use pinpoint, PRESS the button. The pinpoint button will

not deect with pressure; you will feel no movement in

the button. A 2nd press of the button will return you to your previous motion detection mode.

A moderate pressure,

applied briefly to the center of the button, is required.

The button requires a

2-second wait between presses.

GROUND BALANCING

When your CZ-21 QuickSilver is properly “ground balanced,” it will have only a minimal response to ground mineralization. Precise adjustment of the GROUND control is critical for optimum performance. The higher the degree of ground mineralization or the higher the sensitivity setting, the more critical it is to have your machine properly ground balanced. Once you adjust it in either the Autotune mode or Target-I.D. mode, you can switch back and forth between the two modes without resetting. Recheck your setting occasionally as you search because ground conditions often change rapidly.

If you have difculty ground balancing, try reducing your sensitivity

level or moving to another spot just in case you are over a buried piece of metal. In some areas of high ground mineralization you may not be able to use the touch pad method.

GROUND BALANCING

QUICK G.B. METHOD

This will probably be your method of choice in all but the most

difcult of ground conditions. It’s fast, easy and accurate. You can

use this method in either the Autotune or Target-I.D. mode.

1. With GROUND control at “10” hold your search coil 6 to 12 inches off the ground. Make sure you’re at least 3 feet away from any metal objects.

2. Tap the PINPOINT button and lower the search coil to the ground. Rotate the GROUND control clockwise until you hear an audio tone. Then back off to the exact point where the tone disappears.

3. Always ground balance your CZ-21 in the areas you intend to search, whether it’s on land or underwater.

NOTES:

1. If you get an audio response as you rst lower the coil with

the GROUND control at “10,” you’re probably over a piece of metal. Move and try again.

2. If you get a sudden bell tone that is not preceded by an increasing audio response as you lower the coil, you’re probably in some very highly mineralized soil or sand. In this case, it’s best to use the “bobbing” method.

3. If you don’t get any audio response, or just a very faint one as you rotate the GROUND control from “10” all the way to “0,” you’re probably in an area where there’s very little ground mineralization. Just leave the GROUND control at “10” and begin searching.

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