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ATTENTION:
Damage do to neglect or accidental damage is
not warrantable
IMPACT WARNING:
Impact to the front knobs, the front edge, or the
case will cause the front plate to fracture, resulting
in leakage.
Such damage is not warrantable.
CABLE STRESS:
If you hip-mount the CZ-21, leave slack in the cable
so as not to pull cable taunt at end of sweep.
Damage to coil cable at housing connection is not
warrantable if a result of repetitive, excessive stress.
Copyright© 2010 by Fisher Research Labs, Inc.
All rights reserved, including the right to reproduce this book,
or parts thereof, in any form.
Published by Fisher Research Labs, Inc.
Fisher® is a registered trademark of Fisher Research Labs, Inc.
www.fisherlab.com
1465-H Henry Brennan Dr., El Paso, TX 79936 • (915) 225-0333
MCZ21B
Deep Search, Land and Underwater, Target I.D. Metal Detector
060110
CZ-21 QuickSilver
Operating Manual
F I S H E R
R E S E A R C H
L A B S
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Summary of Contents for Fisher Research Labs CZ-21 QuickSilver
- Page 1 ATTENTION: Damage do to neglect or accidental damage is not warrantable IMPACT WARNING: Impact to the front knobs, the front edge, or the case will cause the front plate to fracture, resulting CZ-21 QuickSilver in leakage. Deep Search, Land and Underwater, Target I.D. Metal Detector Such damage is not warrantable. CABLE STRESS: If you hip-mount the CZ-21, leave slack in the cable so as not to pull cable taunt at end of sweep. Damage to coil cable at housing connection is not warrantable if a result of repetitive, excessive stress. Copyright© 2010 by Fisher Research Labs, Inc. All rights reserved, including the right to reproduce this book, or parts thereof, in any form. Published by Fisher Research Labs, Inc. Fisher® is a registered trademark of Fisher Research Labs, Inc. www.fisherlab.com 1465-H Henry Brennan Dr., El Paso, TX 79936 • (915) 225-0333 Operating Manual...
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Page 2: Table Of Contents
Target Recovery ..............pg. 27 package and return the detector within 15 days of calling to: Recovery Tools ................pg. 28 False Signals ................pg. 29 Fisher Research Labs, Inc. Battery Replacement .............pg. 33 1465-H Henry Brennan Dr. Maintenance ................pg. 35 El Paso, TX 79936 Phone: 915-225-0333 ext.118... -
Page 3: About Your Detector
ABOUT YOUR DETECTOR TREASURE HUNTERS’ CODE OF ETHICS LET’S PRESERVE OUR TREASURED SPORT! Your CZ-21 QuickSilver is an all-purpose metal detector engineered for land, beach, salt and fresh-water treasure hunters. Laws governing the use of metal detectors are becoming Here are some important features: more and more common. In many countries, the use of metal detectors is illegal or severely restricted. Don’t let this happen in 1. Leakproof: Submersible to 250 feet. your area. 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 • Always check Federal, State, County and local laws for U.S. coins, silver rings and some gold rings. before searching. 3. Depth: Patented Fourier domain signal analysis. Two • Respect private property and do not enter private deep-seeking, ground-compensating VLF signals property without the owner’s permission. - Page 4 SPECIFICATIONS ABOUT YOUR DETECTOR 10. Search Coils: The CZ-21 comes with the 8” coil as Batteries ....Separately Sealed Compartment ... Yes standard equipment, but can also be custom ........Type .......... (4) 9V Alkaline ordered with the 10” coil. All coils are permanently ........Life Alkaline ........35-55 hrs. attached........Nicads 1 0-20 hrs. 11. Balanced, Comfortable and Hipmountable: Cushioned arm rest, soft foam grip and a control housing that Operating Temperature ..
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Page 5: Condensed Operating Instructions
SPECIFICATIONS CONDENSED OPERATING INSTRUCTIONS Factory Pre-Set “Turn-On-and-Go” Marks Length ..... Extended ............ 50” ........Collapsed ........... 30” Your CZ-21 QuickSilver is simple to operate. Even so, we strongly recommend that you read this entire manual. You’ll be able to Weight 8” Coil 10.5” Coil 5” tune your CZ-21 to your specific needs and conditions. Complete (with headset)....5 lb...11 oz. 6 lb...1 oz. 5.4 lb. Handle and Search Coil ....2 lb...6.9 oz. 2 lb...12.9 oz. 2.1 lb. Figure 1. Factory pre-set turn-on-and-go marks (circled in red or Control Housing ............... 2.8 lbs. blue on your CZ-21 control panel) can get you up and running immediately. -
Page 6: Headphones
Where To Use Your Metal Detector In The U.S. CONDENSED OPERATING INSTRUCTIONS 2. Adjust the volume control for a comfortable volume National Forest and Federal Lands—Metal detecting is allowed when the coil is passed over a large, shallow only by special permit acquired from the federal government. target. Each area has a district office. 3. Travel slowly, overlap your sweeps and keep the Corps of Engineers, Lakes, Shorelines and Lands—Permission has search coil moving. Remember, you’re in a “motion”... -
Page 7: Assembly
ASSEMBLY BATTERY DOOR GASKET: ORIENTATION Your Fisher CZ-21 requires little assembly. Handle it carefully, care CROSS SECTION 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 CASE BATTERY up the hole in the lower stem between the two holes in DOOR the search coil “ears.” Attach the coil to the stem with... -
Page 8: Setting Up
MAINTENANCE ASSEMBLY Your CZ-21 doesn’t require a lot of care. It’s built with high-quality Adjustable Arm Rest Upper Stem materials, and it’s waterproof to a depth of 250 feet. But there are a few things you should do to keep it in peak operating condition. Handling 1. Do not drop your detector. 2. Do not drop the housing directly on to the knobs. Damage caused by impact is not warrantable. Storage Screw Hole 1. If you’re not going to be using it for awhile, take the batteries out. Acid damage caused by leaking batteries can be severe. Damage from battery acid is not warrantable. 2. Avoid extreme temperatures. Don’t leave it inside Figure 3. -
Page 9: For Diving
BATTERY REPLACEMENT SETTING UP VERY IMPORTANT 3. You should now be able to move into your “search” position by leaning slightly forward and raising the Follow these instructions carefully to avoid getting water in the search coil no more than 2 inches above the ground. battery compartment. Your arm should still be straight, and the coil should be parallel to the ground, about 12 inches in front 1. Tuck in the wires. Do not pinch them in the seal when closing. of your foot. The coil angle may have to be slightly 2. The battery door will capture the battery holder and self-center readjusted at this point. it as you install the door. SETTING UP FOR DIVING 3. Tighten the knobs SECURELY. Unlike most VLF metal detectors, the CZ-21 works well in salt a. Use a coin. water. This capability, along with its deep-seeking sensitivity, makes b. -
Page 10: For Hipmounting
BATTERY REPLACEMENT SETTING UP The CZ-21 is powered by four, 9-volt transistor batteries located Caution: Hipmounting the CZ-21 control housing is not in the rear section of the control housing. The batteries are sealed recommended for underwater use. The search coil cable may off from the electronics so that accidental water leakage into the become entangled with a submerged object, making it difficult battery compartment will not damage the circuitry. - Page 11 FALSE SIGNALS SETTING UP to your original direction, you’ll receive a single beep directly over the target. a) Shallow coins (at or near the surface) or coins on edge will give a double beep: one on either side of the coin, just like a nail. Like the nail, the coin on edge will give a single beep directly Hold unit firmly and separate handle, being careful not to drop over the target if you sweep at right angles to the control unit and damage it. Place unit battery side down with your original position. battery cover on table top, or a flat stable surface and grasp the b) A coin lying in the ground at an angle (as unit firmly in one hand and the handle grip firmly in the other.
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Page 12: Control Panel
CONTROL PANEL FALSE SIGNALS 1. VOLUME/OFF: Power on-off and volume control. 6. Wet Salt Water Sand: Your CZ-21 should be able to Volume is gradually increased from 1-5 settings. From handle most wet sand easily unless it’s black. See 5-10, loud-target response is held constant while faint Black Sand above. You should able to reduce the targets continue to get louder. number of false signals caused by salt water by 2. DISC: In the 0-6 positions, the CZ-21 is in the target I.D. lowering your sensitivity and making sure you are mode, which is a silent, no-threshold, motion-discrimination ground balanced properly. -
Page 13: Ground Balancing
FALSE SIGNALS CONTROL PANEL I.D. location, your target is probably a piece of iron. battery strength. GOOD BATTERIES: Loud, high pitched tone Reducing your sensitivity level, taking shorter, slower WEAK BATTERIES: Soft, low pitched tone or “ticking” sound sweeps, or increasing the discrimination level may BATTERIES NEED REPLACING: No tone reduce the number of false signals caused by trash. During use, the speaker volume will fade and become 2. Deep Targets: Deep targets, just barely within nearly inaudible before the detector performance is the range of the CZ-21, may be misidentified. For compromised by weak batteries. example, a deep coin may I.D. as iron, or a deep 5. PINPOINT: Activating the PINPOINT feature with the center- piece of iron may I.D. as a coin. There’s not much you positioned button enters a NO-MOTION detection mode. In can do to avoid this other than to use your pinpoint... -
Page 14: False Signals
FALSE SIGNALS GROUND BALANCING QUICK G.B. METHOD A “false signal” occurs when a target is incorrectly identified. For example , a small, broken-off piece of pull tab may be identified This will probably be your method of choice in all but the most as a nickel. Or a small, deep coin, especially in mineralized soil, difficult of ground conditions. It’s fast, easy and accurate. You can may read “IRON.” The more sensitive the metal detector, the use this method in either the Autotune or Target-I.D. mode. -
Page 15: Recovery Tools
RECOVERY TOOLS GROUND BALANCING 1. Sand scoops designed especially for beachcombers BOBBING METHOD and shallow-water treasure hunters are available at 1. Turn disc knob to “AUTOTUNE”, this puts you into metal detector outlets. Autotune mode. Set the “SENSITIVITY” control so that 2. Divers use a variety of recovery tools, depending you just barely hear a threshold hum. on the condition of the sea bed or lake bottom. A Hold the search coil 6 to 12 inches over the ground sturdy dive knife will suffice in packed mud or small and at least 3 feet away from any metal objects. Do rocks. Most divers prefer to use their hands in loose not use the PINPOINT button during any part of this... -
Page 16: Target Recovery
TARGET RECOVERY GROUND BALANCING 4. With a little practice, you should be able to ground Once you’ve identified and pinpointed a target, your objective balance quickly by “bobbing” the coil up and is to recover it quickly and neatly, leaving virtually no trace of your down in a continuous movement as you adjust the excavation. There are almost as many ways to do this as there are GROUND control with your thumb. treasure hunters. Whatever works for you is good enough as long as you don’t break any laws, leave uncovered holes or damage NOTES: the environment either on land or underwater. 1. If you get an audio response as you first lower the coil with Generally speaking, divers and beachcombers do little, if any, the GROUND control at 10, you’re probably over a piece of damage to the environment while recovering small targets. -
Page 17: Search Modes
SEARCH MODES TARGET IDENTIFICATION Your CZ-21 has two search modes: Target I.D. and Autotune. Both a feel for which target classifications will be the most search modes are “motion” modes, meaning the search coil must productive. be in motion to detect a target. Unlike other metal detectors, the 13. Look for repeatable signals and don’t waste time discrimination level has little, if any, effect on the depth capability on disappearing or one-way signals. If you hear a of the CZ-21. Note, however, that the all-metal Autotune mode has good beep but can’t repeat it when you go back a wider search pattern and may detect a little deeper. Depth is over the target area, or if it beeps in only one sweep also determined by the size, shape and conductivity of the target direction, it’s probably a piece of trash - something as well as the sensitivity setting of the CZ-21. below your discrimination setting. 14. If you’re in a relatively non-trashy area, try searching AUTO TUNE MODE in the Autotune mode and then identifying your Set the DISC control to AUTOTUNE, for a very sensitive, wide-... - Page 18 TARGET IDENTIFICATION SEARCH MODES TARGET I.D. MODE may fall into just about any category, the smaller When the DISC control is set in the 0-6 positions, the CZ-21 has nuggets falling on the lower half of the scale. So if the ability to identify many types of small targets and, depending you’re not just looking for U.S. coins, you should test on the discrimination level, reject or ignore most of them. To better some sample targets to determine what level of understand just how your CZ-21 responds to different targets, try discrimination you want to work at and what targets the following: you want to dig. 10. Here’s a quick and easy way to tell the difference 1. Scatter some sample targets such as coins, rings, pull between a small, shallow piece of foil and a gold tabs, nails and foil on the ground at least 18 inches ring (or other possibly good target) without digging: apart. Include some large targets as well: jar lids, soda If you get a good solid “FOIL” I.D., set the search cans, etc.
- Page 19 TARGET IDENTIFICATION SEARCH MODES 8. Most silver rings will give a high tone. Most gold rings coin. will fall into the pull tab/foil mid-tone category. This is 5. The DISC control provides increments of rejection and due to the unavoidable fact that most gold rings are identification within the mid- and high-tone target conductively similar to aluminum foil and pull tabs. classifications. Take a look at the target I.D. decal Some are more closely identical to the U.S. 5-cent on your control housing to see what gets rejected piece; however, the CZ-21 does have the unique at which DISC point. ability to separate those signals from the aluminum 6. If you’re getting a high-tone response for example, trash signals.
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Page 20: Target Identification
SEARCH MODES PINPOINTING and rejected at “3.” TARGET IDENTIFICATION 12. You may expect varying signals over different targets and at different levels of discrimination. Note that as you progressively increase the discrimination level, Target I.D. with the CZ-21 is quick and simple. Just keep in mind more and more targets are eliminated. these two rules: 13. Now switch the DISC control to the AUTOTUNE 1) You must be in the Target I.D. mode. position and note the completely different kind of 2) The center of the search coil must pass directly over the response. No tone, just a smoother, solid response target. - Page 21 PINPOINTING SEARCHING ON LAND OR SHALLOW WATER Target location is quick and easy using the touch pad pinpoint and/or size of the target. Recommended starting mode. The coil does not have to be moving to get a response in point: VOLUME = “5,” then adjust the volume control for comfort over loud targets. this mode. 5. Once the controls are properly set, begin searching by walking slowly and sweeping the search coil in a 1. Whether in Autotune or Target I.D. mode, once the tight semicircle as shown in Figure 9. presence of a target is indicated by the “beep- 6. Keep the coil parallel to the ground and as close to beep” of your CZ-21, simply move the coil away the ground as practical. This is extremely important for from the target area, and with the coil lightly on maximum coverage and depth. If you’re searching...
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Page 22: Searching Underwater
SEARCHING UNDERWATER SEARCHING ON LAND OR SHALLOW WATER The CZ-21 is waterproof to 250 feet, and it operates the same Impact of sweep speed, ground mineralization, and underwater as on land. Some differences in search technique search mode should be noted. 1. Tune your CZ-21 underwater on the bottom as 1. Minimum depth instructed on page 6. Many divers prefer to use the a. Very slow or very fast sweep speed Autotune mode, in which case you may want to run b. Highly mineralized soil c. Target I.D. search mode...
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