Fisher CZ-3D User Manual
CZ-3D
Deep Search, 4-Tone, Target I.D. Metal Detector
Maximized for finding older era coins
at older sites!
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
CONTENTS
About Your Detector ................................................................ pg. 1
Condensed Operating Instructions ........................................pg. 2
Factory Preset “Turn-On-And-Go” Marks ..............................pg. 2
Setting Up ..................................................................................pg. 3
Hipmounting ............................................................................. pg. 5
Control Panel ............................................................................ pg. 5
Turn-On Procedure ................................................................... pg. 7
Ground Balancing .................................................................... pg. 7
Pushbutton Method .................................................................. pg. 8
“Bobbing” The Search Coil Method ....................................... pg. 8
Search Modes ........................................................................... pg. 10
Search Modes: Auto Tune ....................................................... pg. 11
Search Modes: Target ID ........................................................ pg. 11
Searching .................................................................................. pg. 16
Pinpointing: Pushbutton Pinpoint Mode ..................................pg. 18
Pinpointing: Target ID and Autotune Modes .......................... pg. 19
Depth Reading .......................................................................... pg. 22
Target Recovery .......................................................................pg. 23
Recovery Tools ..........................................................................pg. 24
False Signals .............................................................................. pg. 24
Maintenance ............................................................................pg. 25
Treasure Hunters’ Code Of Ethics ............................................ pg. 26
Battery Replacement ............................................................... pg. 27
Specifications ...........................................................................pg. 28
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
1
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!
2
SETTING UP
Drop-in battery compartments
and cable connector at rear of
housing(not shown)
Removable control
housing (belt loop on
underside of housing)
Foam hand grip
Padded arm rest
Built-in detector stand
Upper stem
Upper
lock nut
Seven foot
search coil
cable
Adjustable
non-metallic
lower stem
Center
section
Lower
lock nut
Figure 1. FISHER CZ-3D
8-inch Spider
search coil
Nylon wing nut
(replacable
Duro-Neoprene
bushings, not
shown)
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 chestmount 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
5
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. When rotated clockwise, sensitivity to targets
(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.
Volume is gradually increased from 1 to 5 settings. From
5 to 10, loud target response is held constant while faint
targets continue to get louder (audio boost).
1
2
3 4 5
Figure 3, CONTROL PANEL
7
6
6
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
piece of metal. In some areas of high ground mineralization you may
not be able to use the “pushbutton” method.
7
“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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