Fisher Metal Detector CZ 3D User Manual

CZ-3D

Deep Search, 4-Tone, Target I.D. Metal Detector

OPERATING MANUAL

F I S H E R R E S E A R C H L A B O R A T O R Y

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ABOUT YOUR DETECTOR

Your CZ-3D is an extremely advanced and sophisticated

instrument. It is maximized for a very speciﬁc function - ﬁnding

& properly identifying older era coins at older sites. Simply

select the "enhance mode" with the utilization of the "salt/

enhance" switch to ﬁnd more rare coins!

The CZ-3D was designed to ﬁnd more good metals such as

brass, bronze, copper, silver, and certain gold: reporting it

as a high tone. In addition, a fourth tone has been added to

distinguish between the midtone heard on round & square

"pull tabs" and foil - this enhances your ability to recover gold

jewelry.

With this detector, performance and ID can be further

enhanced by a slower coil sweep speed, more so than previous

CZ models, especially in trashy areas.

Read this instruction manual thoroughly, practice often and

you will be ready 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...

Happy Hunting!

Fisher Research Laboratory

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CONDENSED OPERATING INSTRUCTIONS

FACTORY PRE-SET “TURN-ON-AND-GO” MARKS

Your CZ-3D is fairly simple to operate, especially when compared

to other target ID machines. Even so, we strongly recommend that

you read this entire manual. You’ll be able to tune your CZ-3D to

your speciﬁc needs and conditions. A good understanding what

to do and why will lead you to more ﬁnds.

If you can’t wait any longer, and you’re an experienced detector

user, here’s some quick instructions to get you going:

1. Set all the controls to the red numbered

“Turn-On-And-Go” marks:

GROUND = 5

DISC = 4

SENSITIVITY = 3

MODE = ENHANCE

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 and that’s

why the sensitivity level is set low—to reduce false

signals caused by ground mineralization.

2. If you’re using headphones, adjust the volume

controls for a comfortable volume when the coil is

passed over a large shallow object.

3. Walk slowly, overlap your sweeps and keep the

search coil moving. Remember you are 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. Once you’ve pinpointed the target, note the

approximate depth reading on the meter, then

identify it by releasing the pinpoint button and

moving the coil side to side in short strokes over

the target. The meter needle will lock onto the

appropriate target classiﬁcation.

6. Happy Hunting!

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SETTING UP

8-inch Spider

search coil

Drop-in battery compartments

and cable connector at rear of

housing(not shown)

Adjustable

non-metallic

lower stem

Center

section

Removable control

housing (belt loop on

underside of housing)

Foam hand grip

Padded arm rest

Nylon wing nut

(replacable

Duro-Neoprene

bushings, not

shown)

Upper

lock nut

Lower

lock nut

Seven foot

search coil

cable

Upper stem

Built-in detector stand

Figure 1. FISHER CZ-3D

The CZ-3D comes to you just about ready to use. Take a look at the

diagram above and familiarize yourself with the parts of the CZ-3D

before proceeding.

1. Unpack your new CZ-3D carefully. Save the carton

and inserts for future storage or shipment.

2. Take a look inside the locknut on the upper stem.

Note the clear plastic locking pad on the left hand

side and loosen the lock nut by rotating it fully

counterclockwise.

3. Slip the lower stem into the center section.

4. Adjust the stem length (using the guide pin & stem

lock nut) and the coil angle (using the nylon wing

nut) so the search coil rests ﬂat on the ground about

6 inches in front of, and slightly to the right of your

right foot, (to the left of your left foot for left handers).

Your arm should be straight and relaxed, with the

grip held loosely.

REMEMBER: The longer the shaft, the more you will

have to bend your elbow and the sooner your arm

will get tired. The CZ-3D is balanced for comfortable

searching in a tight semicircle around the front of the

operator.

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SETTING UP

5. With the stem length properly adjusted, wrap the

loop cable tightly around the center section stem

and secure it with the two Velcro straps. Connect

the cable connector to the control housing.

CAUTION: Make sure that the cable is not pulled tight

at the control housing and that you have enough slack

at the search coil to adjust it to any angle.

6. With the shaft length and coil angle properly

adjusted, you should be able to move into your

“search” position (as shown in illustration below) by

leaning forward very slightly and raising your arm (still

straight) until the search coil is about 2 inches above

the ground and 12 inches in front of your foot. The

search coil should be parallel to the ground and may

have to be slightly readjusted at this point.

Figure 2. SEARCH POSITION.

Adjust the stem length and coil

angle so the coil rests ﬂat on

the ground about 6 to 12 inches

in front of your foot. Move

into your “search” position by

leaning forward slightly and

raising the coil about 2 inches

off the ground. This should put

the search coil out about 12 to

18 inches in front of your foot.

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HIPMOUNTING

1. Disconnect the cable from the control housing and

unwind all but the last twelve inches from the stem.

Secure the lower end of the cable with a Velcro strap

at least twelve inches up from the coil.

2. Slide the control housing off the handle by holding

the handgrip with one hand and pulling the housing

towards you with the other hand.

3. Reconnect the cable to the control housing. It is

especially important that the cable connector

be installed tightly to prevent false signals during

hipmount use. Tight, but never tightened with

anything but your hands.

4. Put your belt through the slots on the underside of

the housing.

5. Left handers should wear the housing on their right

hip and right handers on their left hip.

NOTE: If you’re working in shallow water you may want

to hang the control housing around your neck or chest-

mount with Fisher’s Chest Harness. Just make sure

you put it in a heavy plastic bag sealed tightly around

the cable. Remember, the only thing waterproof about

the CZ-3D is the search coil.

CONTROL PANEL

1. GROUND: Used to electronically cancel the effects

of ground mineralization. Proper use of this control

will minimize false ground signals and insure that the

CZ-3D is operating at its maximum potential in just

about any ground condition including wet ocean

sand.

2. DISC: In the 0 through 6 position the CZ-3D is in

the target ID 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-3D is in an all-metal mode. In this

mode, the CZ-3D has a wider and deeper search

pattern, however, it lacks the ability to discriminate

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CONTROL PANEL

or identify targets.

3. PINPOINT/DEPTH READING: A three purpose, spring

loaded push-button. When pushed and held, the

CZ-3D goes into a no-motion, all-metal mode for

precise pinpointing and approximate depth reading

of coin-sized targets. This button is also used in

conjunction with the GROUND control during the

ground balancing procedure.

4. SENSITIVITY/BATT TEST: In the extreme counter-

clockwise position, the battery condition is checked

as indicated by a strong or weak tone and a meter

reading. Whenrotatedclockwise, sensitivitytotargets

(as well as ground mineralization and electrical

interference) is increased. When in the AUTOTUNE

mode, this control also acts as a “threshold tone”

control.

5. HEADPHONES: This connector accepts most stereo

headphones.

6. MODE: ENHANCE position for dry land or shallow fresh

water hunting. SALT position for wet-sand ocean

beaches or hunting in shallow surf.

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

Volumeisgraduallyincreasedfrom1to5settings.From

5to10,loudtargetresponseisheldconstantwhilefaint

targets continue to get louder (audio boost).

Figure 3, CONTROL PANEL

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TURN ON PROCEDURE

1. Set your controls as follows:

GROUND = 10

DISC = 0 for normal use in target ID mode. (Set DISC

to “Auto tune” for deep search, all-metal Auto tune

mode.

SENSITIVITY = 10

MODE =ENHANCE

VOLUME = OFF

2. Hold the search coil waist high, away from any nearby

metal.

3. Turn the VOLUME control to 10. A brief bell tone is

normal when you turn the VOLUME control on.

If you’re in the Auto tune Mode, you’ll hear an audio

“threshold” hum. Lower the SENSITIVITY control until

you can just barely hear it.

4. If you’re wearing headphones, reduce the headphone

volume controls to a comfortable level when the search

coil is passed over a large, shallow target.

GROUND BALANCING

When your CZ-3D is properly “ground balanced,” it will have only

a minimum response to ground mineralization. Precise adjustment

of the ground control is critical. The higher the degree of ground

mineralization or sensitivity setting, the more critical it is. Once you

adjust it in either the Autotune mode or Target ID mode, you can

switch back and forth between the two modes without resetting

it, unless you increase the sensitivity level or go from dry sand

to wet sand or vice versa. You should also recheck your setting

occasionally as you search since ground conditions often change

rapidly.

If you have difﬁculty ground balancing, try reducing your sensitivity

level or moving to another spot just in case you are over a buried

pieceofmetal. Insomeareasofhighgroundmineralizationyoumay

not be able to use the “pushbutton” method.

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“PUSHBUTTON” GROUND BALANCE METHOD

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

difﬁcult of ground conditions. It’s fast, easy and accurate. You can

use this method in either the Autotune or Target ID mode.

1. With your controls set as in the “Turn-On” procedure,

(GROUND control at 10), hold the search coil parallel

to and 6 to 12 inches off the ground. Press the

PINPOINT button and hold it until you’ve completed

step 2. Make sure you’re at least three feet away

from any metal objects.

2. Still pressing the PINPOINT button, lower the coil to the

ground. Starting at 10, rotate the GROUND control

clockwise until you hear an audio tone. Then back

it off to the exact point where the tone disappears.

Release the PINPOINT button and you’re ready to

search.

NOTES:

1. If you get an audio response as you ﬁrst 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 belltone not proceeded 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.

4. Recheck your ground balance occasionally and make sure you

haven’t accidentally moved the MODE switch.

“BOBBING” THE SEARCH COIL METHOD

This method takes a little more practice, but you may ﬁnd it slightly

more accurate with fewer false signals from ground minerals.

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"BOBBING" THE SEARCH COIL METHOD

1. Set as in the “Turn-On” procedure, making sure the

DISC control is at AUTOTUNE and the SENSITIVITY

control is set so you can just barely hear a threshold

hum. Hold the search coil parallel to and 6 to 12

inches over the ground and at least three feet away

from any metal objects. Do not use the PINPOINT

button during any part of this procedure.

2. Lower the coil to an inch or two above the ground

and then quickly raise it. Note that as you lower the

coil, the tone disappears, then gets louder as you

raise it and ﬁnally returns to normal when you stop it

6 to 12 inches above the ground. Conversely, if you

set the GROUND control to 1, the threshold hum will

get louder as you lower the coil and disappear when

you raise it.

3. Your objective now is to adjust the GROUND control

so that there is no change, or only a minimum

change in the threshold hum, as you move the coil

up and down. Start by lowering the GROUND control

to 9. Lower the coil and raise it again. One of three

things will happen to your theshold hum:

A It will fade again as you lower the coil and increase

as you raise it. Continue to lower the ground

balance setting in small increments until the

threshold hum remains the same (or changes very

little) as the coil is lowered and raised.

B It will get louder as you lower the coil and go silent

as you raise it. Increase the ground balance level

(rotating the control counterclockwise) in small

increments until there is little or no change in the

threshold level.

C The hum will remain the same, or if it changes

slightly, the change is the same whether you lower

or raise the coil. Your CZ-3D is properly ground

balanced, and you are ready to begin your

search. You have gone past the correct ground

balance setting.

4. With a little practice, you should be able to ground

balance quickly by “bobbing” the coil up and

down in a continuous movement as you adjust the

GROUND control with your thumb.

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“BOBBING” THE SEARCH COIL METHOD

NOTES:

1. If you get an audio response as you ﬁrst 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, not preceded by an increasing audio

response, you’re probably in some very highly mineralized soil

or sand. Instead of lowering the coil to an inch or two above the

ground as in step 2 above, stop just before you hear the bell tone

and ground balance as instructed. It will then be necessary to

maintain that coil height as you search.

3. lf you don’t get an audio response, or if the hum stays the same

no matter where you set the GROUND controls as you bob the

coil up and down, you’re probably in an area where there’s very

little ground mineralization. Just leave the GROUND control

at 10 and begin searching.

SEARCH MODES

Your CZ-3D has two search modes: 1) Target ID or 2) Autotune. Both

search modes are “motion” modes, meaning the search coil must be

in motion to detect a target.

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SEARCH MODES

AUTOTUNE SEARCH MODE

Set the DISC control to Autotune for a very sensitive, wide-scan, all-

metal, motion search mode. Since this mode responds to all metal

targetsanddoesnothavetheabilitytoidentifyorrejecttargets,thiswill

probably not be your normal search mode.

The Autotune mode does have some advantages however which

make it useful to use in at least two situations:

1. Non-TrashyAreas.SincetheAutotunemodehasawider

scan than the ID mode, you’re less likely to miss a good

target when using it. Search in the Autotune mode until

you ﬁnd a target. Pinpoint the target using the PINPOINT

buttonandthenswitchtheDISCcontrolto“0”toidentify

it. The DISC control is positioned so that you can switch

back and forth between Autotune and “0”.

2. Highly Mineralized Soil or Sand. The Autotune Mode

is recommended for black or gray sand beaches or

highly mineralized soil. Under these conditions it may be

necessarytolowerthesensitivitylevelandsweepseveral

inchesofftheground.Goldnuggetsaregenerallyfound

in highly mineralized soil so this will be the search mode

of choice for prospectors.

TARGET ID SEARCH MODE

When the DISC control is set in the 0 through 6 position, the CZ-3D has

theabilitytoidentifymanytypesofsmalltargetsand,dependingonthe

discriminationlevel,rejectorignoremostofthem.Tobetterunderstand

just how your CZ-3D responds to different targets, try the following:

1. Scatter some sample targets such as coins, rings, pull

tabs,nailsandfoilonthegroundatleast18inchesapart.

Include some large targets as well; jar lids, soda cans,

etc.

2. Set the DISC control at “0”, SENSITIVITY at “5”, MODE

at ‘ENHANCE’, VOLUME at “10”. If you’re wearing

headphones, reducethevolumetoacomfortablelevel

whenyouareoveralargetarget.

3. Ground balance the CZ-3D as in the “Ground Balance”

procedure.

4. Holdthesearchcoilabouttwoinchesaboveandparallel

to the ground and move it slowly back and forth across

each sample. Remember, the coil must be in motion to

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SEARCH MODES

getaresponse.KeepinmindthatforaccuratetargetID,

the coil center must pass directly over the target.

5. Note the response you get over small targets. For small

iron or steel targets, the meter needle will usually lock in

the “IRON” category. Most pull tabs, foil, nickels and the

newer zinc pennies will also be correctly classiﬁed. Silver

coins, copper coins, and the newer clad coins will ID in

the highest category.

6.Notethatanenlongatedferrousobjectsuchasanailwill

giveyouadouble“beep”asyoucrossitfromendtoend

and a single “beep” if you cross its center.

7. MostsilverringswillIDatthehighestendofthescale.Ifyou

haveenoughgoldringsyouwillnotethatsomefallinthe

roundtabcategory,someinthe“FOIL”category,some

inthesquaretabcategory,afewinthenickelcategory,

and very few in the remaining coin categories. This is

due to the fact that the combination of size, shape and

conductivity of a particular ring will almost always add

up to a target that is electronically identical to either a

pieceoffoil,pulltabornickel.Mostmetaldetectorshave

a difﬁcult time separating gold rings, nickels, tabs, and

foil, but, the patented circuitry of your CZ-3D can easily

tellthedifferencebetweennickelsandmosttrash.Better

yet,itwillallowyoutoﬁndmanytypesofgoldringswhile

completelyignoringatleastsometypesofpulltabsand

small pieces of foil.

8. Note also the different audio responses:

a) an iron target will give you a low tone

b) foil a mid low tone

c) tabs a medium tone

d) coins a high tone.

9. When you go over a large, shallow target the CZ-3D will

respond with a distinctive belltone. This is due to thefact

thatmetaldetectorscanonlyidentifysmalltargets.What

usuallyhappensisthatthedetectorcircuitswilloverload

and identify a large target as “good” (silver, coin, etc.).

Your CZ-3D, however, will alert you to the fact that the

target is big and shallow and can not be accurately

identiﬁed. Big deep targets, however, will usually be

classiﬁed as a coin. Also, be aware that large coins on

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SEARCH MODES

thesurfacemaysetoffthebelltone.Theoptional,smaller

5 inch coil is more likely to overload than the standard

8 inch coil.

10. You may also note that some square tabs ID as round

tabs and vice versa. Because of the wide variety of

sizes, shapes and conductivity of the many pull tabs

manufactured over the years, there is overlap as far as

identiﬁcationgoes.Smallpiecesoftabsoraluminumare

often misidentiﬁed. The tail of a round tab for example,

may ID as a nickel. However, most tabs and most of

the items on the CZ-3D meter face will be identiﬁed

correctly.

11. NowincreasetheDISCcontrolto“1”.Youwillﬁndthatthe

CZ-3Drejectsthesmallirontargetsandnolongerresponds

either with an audio tone or needle deﬂection.

12. Continue to increase your DISC control, noting that with

each successive step up you reject more and more

targets.AtDISC=4forexample,youareina“coins-only”

mode, ignoring iron, tabs and foil while accepting and

identifyingmostnickels,zincpenniesandsilver,cladand

copper coins.

13. At the maximum DISC level of 6 the CZ-3D will ignore

mostall-smalltargetsexceptsilver,clad,zincandcopper

coins.

14. Now switch the DISC control to the AUTOTUNE position

and note the completely different kind of response. No

toneormeteridentiﬁcation,justasolid,smooth,response

over every target.

15. The chart on page 14 shows some of the responses

you may expect over different targets and at different

levels of discrimination. As you progressively increase

the discrimination level, you eliminate more and more

targets.

NOTE: Due to the virtually inﬁnite variety of sizes, shapes and alloys

of many “good” targets (relics, jewelry, foreign coins, etc.), they may be

misidentiﬁed. For example, a Civil War mini ball may be identiﬁed as foil,

or a new Canadian coin as a rectangular pull tab.

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SEARCH MODES

FIGURE 4. TYPICAL CZ-3D AUDIO AND METER REPONSES.

METER

IRON

FOIL

READING

DISC SETTING:

SHARP, NARROW

RESPONSE

NO RESPONSE

SMOOTH, BROAD RESPONSE

AUTO

TUNE

COIL

COPPER

PENNY

FOIL

STEEL

SMALL

ZINC

BOTTLE

NAIL

SILVER OR

CLAD COIN

SHALLOW

CAN

BELL TONE

--- GOLD RINGS ----

PENNY

CAP

^#4 HI TONE

AUDIO RESPONSE

^#1 LOW TONE

^#2 MID ^#3MIDLO ^#2 MID

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SEARCH MODES

SUPPLEMENT A. TOM DANKOWSKI'S "ENHANCED" ID CHART

• “REAL WORLD - OTHER” = Probable reading of what all other

detectors will ID the speciﬁed target as in real dirt.

• “REAL WORLD - CZ-3D” =

Most probable reading on the CZ-3D in ‘enhance’ mode.

• TARGET/REAL WORLD

"REAL WORLD OTHER"

“REAL WORLD CZ-3D”

• Dirt exposed Indian Head Cent

Trash /mid-tone

• 1857-1864 White (nickel) Cent

Square-Tab/mid-tone

• U.S. 3-Cent Silver

Trash/mid-tone

• U.S. Half-Dime; real dirt scenario

Trash/mid-tone

• Silver Dime or Quarter; partial masking

Trash/mid-tone

High-Tone

Square-Tab

High-Tone

• Shield Nickel & ‘V’ Nickel; no/slight corrosion

Trash/mid-tone

• Buffalo Nickel; mild corrosion

Trash/mid-tone

• $2.50 Gold Quarter-Eagle

Round-Tab/mid-tone

• $5.00 Gold Half-Eagle

Trash/mid-tone

High-Tone

Square-Tab

High-Tone

• $10.00 Gold Eagle

High-Tone

• $20.00 Gold Double-Eagle

High-Tone

• Many Non-U.S. Coins

Trash/mid-tone

Noteworthy: The older nickels that would previously read as a

‘mid-tone/foil ID’ should now read as a ‘high-tone/nickel ID’. All

other items in this list will now read ‘high-tone’ audio with either

a ‘zinc cent’ or ‘high coins’ meter ID.This is due in part to inﬁnite

variables such as ground mineralization, multiple targets in close

proximity, tilted coins, coins on edge or a combination thereof

Happy "Enhanced" Hunting, Thomas J. Dankowski

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SEARCHING

Good search techniques are as important to your success as having

a good detector.

1. MakesureyourCZ-3DisproperlygroundbalancedandtheMODE

switch is in the proper position: SALT for wet ocean beaches,

ENHANCE for just about every other situation.

2. Decide which search mode you’re going to use, Target ID or

Autotune. Recommended starting point: Target ID mode with the

DISC control set at “4”.

3. Set your SENSITIVITY control. Only experience will tell you how to

set it in every situation but you’ll probably want to run it as high as

you can. Recommended starting point: SENSITIVITY 5 . If you’re in

the Autotune mode, set it so that you can just barely hear a slight

audio hum.

4. AdjustyourVOLUMEcontrol.Rememberthatasettingabove5will

amplify the response of faint targets so they sound like a shallow

or large target. Some searchers prefer not to use it above 5 so the

audio response will give them some idea as to the depth and/or

size of the target. Recommended starting point: VOLUME = 10. If

you’reusingheadphones,adjusttheheadphonevolumecontrols

for a comfortable, not-too-loud response over loud targets.

5. Once you’ve got your controls properly set, begin your search

by walking slowly and sweeping the search coil in a tight

semicircle.

6. Keep the coil parallel to the ground and as close to the ground as

practical. This is extremely important for maximum coverage and

depth. If you’re searching on a lawn, you may set the coil right on

the grass and slightly “scrub” it.

7. Overlap your sweeps by at least 50%. Remember that your coil’s

search pattern is conical and if you don’t overlap each sweep

you’ll miss the deeper targets.

8. Search in a methodical manner. Pay close attention to where

you’re going and where you’ve been.

9. Keep the search coil moving at a comfortable rate. Remember

that the CZ-3D is a motion detector and responds only when the

coil (or the target) is moving (except in the Pinpoint mode).

10. Take your time. If you walk too fast you can’t overlap your sweeps

and you’ll miss a lot of ground. If you swing your coil too fast you

lose some sensitivity to deep and/or small targets.

11. Figure 7 on the next page shows the CZ-3D search coil pattern

and how it is affected by sweep speed, ground mineralization

and search mode.

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SEARCHING

Figure 5. SEARCH PATTERN.

When the stem length is properly

adjusted, the CZ-3D is balanced for

sweeping in a tight semicircle. Wide to

the right for right handers. Wide to the

left for left handers.Be sure to overlap

your sweeps.

Figure 6. COIL ORIENTATION

Keep the search coil parallel and

close to the ground at all times.

Figure 7. SEARCH COIL DETECTION PATTERN

1. Minimum Depth

a. Very slow or fast sweep speed.

b. Discrimination set at “6.”

2. Good Depth

a. Moderate sweep speed.

b. Discrimination set at “4.”

3. Maximum Depth

a. Moderate sweep speed.

b. Discrimination set at “0.”

4. Missed Target

Many targets within range will not

be detected unless you closely

overlap your sweeps.

NOTE: Unlike other metal detectors, the discrimination level has little

if any effect on the depth capability of the CZ-3D. Note however, that

the all-metal, Autotune mode has a wider search pattern and may

detect a little deeper. Depth is also determined by the size, shape

and conductivity of the target as well as the sensitivity setting of

the CZ-3D.

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PINPOINTING

PUSHBUTTON PINPOINT MODE

Target location is quick and easy using the push-button Pinpoint

mode. You do not have to keep the coil moving to get a

response in this mode.

1. Once the presence of a target is indicated by the

“beep-beep” of your CZ-3D, simply move the coil

away from the target area, and with the coil lightly

on the ground or very close to it, press and hold

the PINPOINT button. It doesn’t matter which mode

you’re searching in, Autotune or Target ID.

2. As you bring the coil back into the target area, still

pressing the PINPOINT button, the audio volume and

pitch will increase and the meter needle will swing

to the right.

3. When the needle, pitch and volume are at their

highest points, stop the coil and move it forward

and backward a couple of times, again stopping

over the strongest response.

4. Repeat one more time, side to side and then front to

back, keeping the PINPOINT button pushed in and

stopping over the spot where you get the maximum

volume, pitch and meter reading. Your target should

be directly below the center of your search coil.

With a little practice, you’ll ﬁnd that you don’t even

need to look at the meter unless you want a depth

reading.

NOTE: For quick and accurate pinpointing of strong

signals from large or shallow targets, push and hold

the pinpoint button with the coil very close to the

approximate target area. This will “tune-out” most of

your target so you will receive a response directly over

it. You may also try reducing the sensitivity level and/

or raising the coil so you can barely hear the signal.

For very weak signals, make sure you press the

PINPOINT button with the coil completely out of the

target area. You may also try moving the coil closer to

the ground or increasing the sensitivity and volume

levels.

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PINPOINTING

TARGET ID AND AUTOTUNE MODES

Pinpointing in either of the search modes is difﬁcult and requires

practice. but with practice you should be able to get the hang

of it. Many CZ-3D operators don’t even bother with the Pinpoint

mode unless they want a depth reading.

In Target ID or Autotune, simply use the same basic procedure

for the Pinpoint mode, moving the coil side to side and front to

back over the target area, stopping over the strongest audio

response. The only difference is that you should use as short a

stroke as possible (4 to 6 inches is plenty). When you stop the coil,

you will lose the audio signal. You MUST keep the coil moving at

least slightly, to determine the location of the strongest signal.

TARGET IDENTIFICATION

Target ID with the CZ-3D is quick and simple. Just keep in mind

these four rules:

A. You must be in the Target ID mode. If you’re searching in Auto

tune, switch over to “0” on your DISC control.

B. For accurate identiﬁcation, the center of the search coil must

pass directly over the target.

C. There are many good targets, which are not classiﬁed by the

CZ-3D. As mentioned earlier, gold rings for example may fall in

just about any category except iron. Gold nuggets, depending

on their size and shape, may fall into just about any category,

the smaller nuggets falling on the lower half of the scale. So if

you’renotjustlookingforU.S. coins, youshouldtestsomesample

targets to determine what level of discrimination you want to

work at and what targets you want to dig.

D. Your CZ-3D will correctly identify most small targets most of

the time, but it can be fooled. Large targets, uneven ground

mineralization, a good target lying next to a bad target, and

deep targets, are sources of error.

Remember, the CZ-3D is designed to ID small, coin size

targets only, and even some of these may be deep, bent,

damaged, or corroded enough to give a false signal.

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TARGET IDENTIFICATION

1. Once you’ve located a target, pinpoint its exact

location as in the “Pinpointing” procedure. Since

accurate ID is dependent on accurate pinpointing, it

is recommended that you always press the PINPOINT

button rather than try to pinpoint your target in either

the Autotune or Target ID mode.

2. Once you’ve pinpointed your target, release the

PINPOINT button. If you’re searching in the Autotune

mode, switch over to DISC = 0. If you are already

in the Target ID mode, just leave the DISC control

where it is.

3. Move the coil just enough, left-right-left, across the

target to get a good signal. The meter needle should

lock onto a target classiﬁcation, which in turn will

agree with the audio response (one of 4 tones)

4. If you no longer get a meter reading or audio

response once you’ve pinpointed the target, then

you’re over something that falls below the DISC

setting you’ve chosen and the CZ-3D is rejecting it.

5. Here’s a quick and easy way to tell the difference

between a small shallow piece of foil and a gold

ring (or other possibly good target) without digging:

if you get a good solid, “FOIL” ID, set the search

coil down close to the target and then whip it

rapidly across the target just once with what can

best be described as a ﬂick of the wrist. If the target

disappears, it’s probably a small shallow piece of

foil. If not, dig it up—it could be that gold ring you’re

looking for. Practice this over some foil until you get

the hang of it.

6. Don’t be afraid to turn your sensitivity down. True,

the higher the sensitivity, the deeper your CZ-3D will

go and the more you’ll ﬁnd. But that’s only under

optimum conditions. If you’re getting a lot of false

signals caused by electrical interference, ground

mineralization or dense trash, lower your sensitivity. If

youhavetobackitdownto4, 3oreven2toeliminate

the falsing, do it. That’s what your SENSITIVITY control

is for. You’ll be surprised at how much you might ﬁnd

in an area that would otherwise be unsearchable

at high sensitivity levels.

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TARGET IDENTIFICATION

7. Set your discrimination at an appropriate level. If

there’s very little trash in the area, set it low, say at

iron discrimination and dig every good signal. If there

is a lot of trash present and you’re mainly interested

in coins, set the discrimination level high—you may

even want to sacriﬁce nickels and zinc pennies in

extremely trashy areas. If you’re looking for gold

rings, relics, artifacts, or small ancient coins, you’ll

have to set your discrimination level low. The best

way to ﬁnd out how low is to bury some sample

targets or just dig everything for awhile until you get

a feel for which target classiﬁcations will be the most

productive.

8. Look for repeatable signals and don’t waste time

on disappearing or one-way signals. If you hear a

good beep but can’t repeat it when you go back

over the target area, or if it beeps in only one sweep

direction, it’s probably a piece of trash—something

below your discrimination setting.

9. If you’re in a relatively non-trashy area, try searching

in the Autotune mode and then identify your targets

by switching to DISC = 0. You’ll ﬁnd more and deeper

targets this way.

10. If you’re having any difﬁculty pinpointing or identifying

a target in the ID mode, don’t waste any more time.

Push the pinpoint button for quick pinpointing then

release it for accurate ID.

11. IfyourtargetdisappearswhenyougointothePinpoint

mode, you’ve probably tuned it out by pressing the

button too close to the target or over another piece

of metal. Try again, this time pushing the PINPOINT

button over another piece of ground.

12. Don’t waste a lot of time digging holes for targets

you can’t ﬁnd if your hole keeps getting deeper and

wider, cover it up and go on. You may be over a

buried pipe or some other large deep target.

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DEPTH READING

Your CZ-3D will give you a quick and approximate depth reading

of coin-size targets, usually within an inch.

1. Place the search coil lightly on the ground at least

twelve inches away from your target area.

2. Press and hold the PINPOINT button.

3. Still pressing the PINPOINT button, bring the coil back

over the target and pinpoint its location by stopping

the coil over the point where you get maximum

pitch, volume and needle response.

4. Place the search coil lightly on the ground directly

over the target, and still pressing the PINPOINT

button, note the position of the needle over the

depth reading scale. For example, if the needle is

midway between the four inch and six inch marks,

your target is approximately ﬁve inches deep.

You will quickly realize that the depth reading

procedure is just like pinpointing, however there is

one very important difference: When pinpointing,

where or when you press the pinpoint button is not

real critical. It is often desirable to “detune” your

target by pressing the button when the search coil

is very close to your target and either on the ground

or slightly above it. When taking a depth reading,

however, it is important that the coil be placed lightly

on the ground at least twelve inches away from

the target (or any other metal) before pressing the

PINPOINT button. Also, remember that while you can

pinpoint just about any size target, depth reading is

only accurate for coin size targets.

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TARGET RECOVERY

Once you have identiﬁed and pinpointed a target, your objective

is to recover it quickly and neatly, leaving virtually no trace of your

excavation. There are almost as many ways to do this, as there

are treasure hunters. Whatever works for you is good enough as

long as you don’t break any laws, damage vegetation, or leave

uncovered holes. Generallyspeaking, beachcombersdolittleifany

damage to the environment while recovering targets. However, if

you plan to use your CZ-3D on lawns or in parks, your target recovery

method can be very important. Two of the most successful methods

are illustrated in a separate booklet "Origin of the M-Scope/Target

Recovery" enclosed with your detector .

1. Use headphones. You’ll hear fewer distracting sounds

and more target sounds. And you’ll ﬁnd more.

2. It’salwaysagoodideatowalkslowlyandoverlapyour

sweeps. But if you’re searching large expanses of new

territory you may want to walk a little faster and not

overlap your sweeps as much until you start making a

few good ﬁnds. Then, slow down, overlap your sweeps

and cover every inch of ground.

3. In trashy areas, to reduce the “masking” effects of

trashonnearbygoodtargets, useashorterandslower

sweeppattern. Also, theoptionalsmaller5-inchsearch

coil will zero in on good targets closer to trash.

4. When in doubt, dig. If your CZ-3D can’t quite decide

whether a target is good or bad, dig it up.

5. Goodthingsoftencomeintwos. Oreventhrees. Once

you’ve recovered a good target, always recheck

the hole for a second signal and carefully search the

immediate area by walking slowly around the hole

twoorthreetimes, overlappingyoursweepsinanever

wideningcircle.Alwaysdigeverysuspicioussoundinthe

vicinity of a good ﬁnd.

6. Recheck your hole even if your ﬁnd was trash. Good

targets are often found beneath the bad ones.

7. Practice. Practice over known targets. Practice ground

balancing. Practice pinpointing. Reread the appropriate

part of this manual if you’re having problems.

NOTE: Whichever method you choose, remember that responsible

treasure hunters take pride in their ability to leave soil and vegetation

intact and undamaged.

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RECOVERY TOOLS

A heavy duty blunt screwdriver, sturdy hunting knife, or garden

trowel are commonly used. Made especially for the Hobby of

Metal Detecting are several well designed sand scoops, trowels,

and digging tools . See your local dealer for more information.

FALSE SIGNALS

A “False Signal” occurs when something sounds like a good

target, but is not. Your CZ-3D does a great job of discriminating,

but bad “targets” with similar electrical characteristics can fool

it. Large pieces of trash or items very close to the search coil will

occasionally sound “good”. Experience is the best teacher. As

you accumulate more hours with your CZ-3D, you will soon learn

how to distinguish “false signals”. Initially when you pass over a

target, and get a good response, you will ﬁnd that crossing over the

target once or twice more, the signal will break up or completely

disappear.

The following are some sources of false signals and the solution:

1. Electrical Interference: Caused by radio and TV towers, power

lines, or other metal detectors.

SOLUTION: Move farther away from the source, slow down the

sweep speed, or lower the sensitivity.

2. Highly Mineralized Soil: Soils with a high iron or salt content.

SOLUTION: Reduce the sensitivity, raise the discrimination level or

readjust the ground adjust setting..

3. Extremely Trashy Areas: May result in a lot of “chatter”.

SOLUTION: adjust the discrimination level or reduce the sensitivity.

In some areas, a smaller coil will be beneﬁcial to better achieve

target seperation.

4. Metal Interference: The CZ-3D will pick up metal ABOVE and

on the SIDE of the coil, as well as under. WATCH FOR: Large metal

structures, your digging tool, metal in shoes and your coil cable

hanging loose above the coil.

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FALSE SIGNALS

Figure 8. TARGETS THAT AREN’T THERE.

Coin lying at an angle

or on edge.

Long ferrous object (nail).

Large deep target

(water pipe).

MAINTENANCE

Your CZ-3D doesn’t require a lot of care. It’s built with high quality

materials but there are a few things you should do to keep it in

peak operating condition.

1. If you’re not going to be using it for a while, take

the batteries out. Acid damage caused by leaking

batteries can be severe.

2. Avoid extreme temperatures. Don’t leave it inside

a closed car sitting in the sun, or even worse, the

trunk of a car.

3. If you “scrub” the search coil on the ground, you’ll

eventually wear through the bottom of the coil.

Replacement coils are expensive. Instead, invest in

a coil cover. They’re cheap.

4. Keep your CZ-3D dry and clean. If you’ve been

working in or around salt water or dust, wipe it down

with a damp cloth and dry it with a hair dryer (low or

no heat) or dry cloth. Remove and clean the lower

stem. Keep the lock nut free of sand and dirt.

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TREASURE HUNTERS’ CODE OF ETHICS

LETS PRESERVE OUR TREASURED SPORT!

Laws governing the use of metal detectors are becoming more

and more common. In many countries, the use of metal detectors

is illegal or severely restricted. Don’t let this happen in your area.

ALWAYS get permission to hunt on private property.

ALWAYS leave a site cleaner than you found it. Take at least some

trash with you or, if you can, take it all.

ALWAYS ﬁll in your holes neatly whether you’re in a city park

or remote wildernessness. Leave the land as it was before you

disturbed it.

ALWAYS obey all laws relating to treasure hunting.

ALWAYS return valuable property if you can locate the original

owner.

ALWAYS do whatever you can to give the hobby of treasure

hunting the good image it needs and deserves.

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BATTERY REPLACEMENT

Check your batteries frequently by clicking the SENSITIVITY control

counter clockwise into the BATT test position. The condition of the

batteries will be indicated in two ways:

1) An Audio Tone. The stronger the better. A loud, high-pitched

tone indicates good batteries. A weak, low-pitched tone

indicates weak batteries.

2) A Meter Reading. Replace the batteries when the needle falls

below gray BATT area. Two nine volt transistor batteries are

located in a compartment at the rear of the housing. Always

replace both batteries at the same time. You may also use

rechargeable Nicads but expect about 1/2 the battery life

of an alkaline battery.

1. Remove the battery door by loosening the two

captive screws.

2. Tilt the housing slightly and the batteries will slide out.

3. Install the new batteries. Make sure the contact end

goes in ﬁrst and that you match the polarity markings

on the battery door.

If either or both of the batteries are installed incorrectly,

the CZ-3D will not turn on. The instrument will not

be damaged.

4. Finger tighten the screws down snugly. Do not use a

screwdriver or other hand tool.

Figure 9. BATTERY REPLACEMENT

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SPECIFICATIONS¹

LENGTH ².............................Extended.......................................................51"

..............................................Collapsed ³................................................. 41”

WEIGHT ²...........................Complete ............................................... 3.7 lbs

Control Housing...................................... 1.5 lbs

Handle and Coil..................................... 2.2 lbs

FREQUENCY .....................................................................................................

1. Multiple Frequency Transmit &

Dual, VLF Receive⁴.........5 KHz and 15 KHz

................................................. 2. Target Response:

................................................. Iron ID...........................................200 Hz (LO)

................................................. Foil ................................... 350 Hz (MID LOW)

Tabs............................................450 Hz (MID)

Coin ID............................................1 KHz (HI)

................................................. Auto tone................... 500 Hz -1 KHz (VCO)⁵

Pinpoint/Depth......... 500 Hz -1 KHz (VCO) ⁵

OPERATING MODES ........................................................................................

Auto Tone - VLF-Motion ⁶, all metal with threshold tone

Target ID - VLF Slow Motion ⁶, silent search discrimination Meter.. Lock on 7