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Summary of Contents for Fisher CZ-20 Quicksilver
- Page 1 CZ-20 Quicksilver Deep Search, Body Mount, 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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Page 2: Table Of Contents
CONTENTS About Your CZ-20 ..............pg. 1 Condensed Operating Instructions ........pg. 3 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. 9 Turn on Procedure ..............pg. 10 Ground Balancing.............. -
Page 3: About Your
ABOUT YOUR DETECTOR Your CZ-20 QuickSilver is truly an all-purpose metal detector engineered for land, beach, salt and fresh-water treasure hunters. Here are some important built-in features: 1. Leakproof: Submersible to 250 feet, headphones and all. 2. 3-Tone Target I.D.: A low tone for iron; a mid-tone for pull tabs, foil and most gold rings;... - Page 4 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 finds to tell us about. In the meantime . . . Good Hunting, Fisher Research Laboratory...
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Page 5: Condensed Operating Instructions
CONDENSED OPERATING INSTRUCTIONS Factory Pre-Set ‘Turn-On-and-Go’ Marks Your CZ-20 QuickSilver is fairly simple to operate, especially when compared to other target-I.D. machines. Even so, we strongly recommend that your read this entire manual. You’ll be able to tune your CZ-20 to your specific needs and conditions. - Page 6 CONDENSED OPERATING INSTRUCTIONS GROUND setting of “5” is probably not the optimum setting for the ground you’re searching, and that’s why the sensitivity level is lowto reduce false signals caused by ground mineralization. 2. Adjust the volume control for a comfortable volume when the coil is passed over a large, shallow target.
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Page 7: Assembly
5. The arm rest may be repositioned for maximum comfort by removing the arm-rest screws, sliding the arm rest to the next screw hole and re-installing the arm-rest screws. Your Fisher CZ-20 QuickSilver is built to last for years. Battery access Control Housing 8-inch Spider Control Panel Target I.D. -
Page 8: Setting Up
ASSEMBLY However, it’s a sophisticated electronic instrument containing state-of-the-art components. Handle it carefully, care for it regularly, and it will give you years of dependable service. The CZ-20 requires little assembly. Unpack it carefully and save the carton; it comes in handy if you ever have to return the instrument for service. -
Page 9: For Diving
SETTING UP 1. Adjust the stem length and coil angle so the search coil rests flat 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. -
Page 10: For Hipmounting
SETTING UP 1. 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. - Page 11 SETTING UP “Hipmounting” the CZ-20 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. Grasp the handle grip firmly with one hand and the control housing with the other.
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Page 12: Control Panel
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. 2. DISC: In the 0-6 positions, the CZ-20 is in the target mode, which is a silent, no-threshold, motion- discrimination mode of operation with the ability to identify and then ignore (“reject”) or accept many... -
Page 13: Turn On Procedure
GROUND BALANCING When your CZ-20 QuickSilver is properly “ground balanced,” it will have only a minimum response to ground mineralization. Precise adjustment of the GROUND control is critical for optimum performance. -
Page 14: Pushbutton
GROUND BALANCING PUSHBUTTON 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-I.D. mode. 1. With your controls set as in the “Turn-On” procedure (GROUND control at “10”), hold your search coil parallel to and 6 to12 inches off the ground. -
Page 15: Bobbing
GROUND BALANCING BOBBING 1. 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 3 feet away from any metal objects. - Page 16 GROUND BALANCING have gone past the correct ground-balance setting. Increase the ground-balance level (rotating the control counterclockwise) in small increments until there is little or no change in the threshold level. 7. With a little practice, you should be able to ground balance quickly by “bobbing”...
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Page 17: Search Modes
SEARCH MODES Your CZ-20 has two search modes: Target I.D. and Autotune. Both search modes are “motion” modes, meaning the search coil must be in motion to detect a target. AUTO TUNE Set the DISC control to AUTOTUNE, and you’re in a very sensitive, wide-scan, all-metal, motion search mode. - Page 18 SEARCH MODES on the discrimination level, reject or ignore most of them. To better understand just how your CZ-20 responds to different targets, try the following: 1. Scatter some sample targets such as coins, rings, pull tabs, nails and foil on the ground at least 18 inches apart.
- Page 19 SEARCH MODES to overload than the 8- or 10 1/2-inch coils. 8. Most silver rings will give a high tone. Most gold rings will fall into the pull tab/foil mid-tone category. This is due to the unavoidable fact that most gold rings are conductively similar to aluminum foil and pull tabs.
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Page 20: Searching On Land Or In Shallow Water
SEARCH MODES targets and at different levels of discrimination. Note that as you progressively increase the discrimination level you eliminate more and more targets. 13. Now switch the DISC control to the AUTOTUNE position and note the completely different kind of response. - Page 21 SEARCHING ON LAND OR SHALLOW WATER search coil in a tight semicircle as shown. When the stem length is properly adjusted, the CZ- 20 is balanced for sweeping in a tight pattern around the front of the operator: wide to the right for right handers, wide to the left for left handers.
- Page 22 SEARCHING ON LAND OR SHALLOW WATER 1. Minimum depth a. Very slow or very fast sweep speed b. Highly mineralized soil c. Target I.D. search mode 2. Good depth a. Moderate sweep speed b. Moderately mineralized soil c. Target I.D. search mode 3.
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Page 23: Searching Underwater
SEARCHING UNDERWATER The CZ-20 is waterproof to 250 feet, and it operates the same underwater as on land. However, some differences in search technique should be noted. 1. Tune your CZ-20 underwater on the bottom as instructed on p. 9. Many divers prefer to use the Autotune mode, in which case you may want to run your threshold tone slightly higher than you would on land. -
Page 24: Pinpointing
PINPOINTING Target location is quick and easy using the pushbutton 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-20, 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. -
Page 25: Target Identification
PINPOINTING Target I.D. Mode and Autotune Mode Pinpointing in either of the search modes is more difficult, but with practice you should be able to get the hang of it. (Many CZ-20 operators don’t even bother with the Pinpoint mode.) Simply use the same basic procedure as you would using the Pinpoint mode, moving the coil side to side and front to back over the target area, stopping over the strongest audio... - Page 26 TARGET IDENTIFICATION the DISC setting you’ve chosen, and your CZ-20 is rejecting it. 4. Once you’ve pinpointed your target and you’re getting a good, consistent signal, you’ve identified or at least classified your target. A low tone means your target is probably ferrous. A mid tone indicates a pull tab or foil, and the high tone indicates a U.S.
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Page 27: Target Recovery
TARGET IDENTIFICATION sources of error. Remember, the CZ-20 is designed to I.D. small, coin-sized targets only, and even some of these may be deep enough, bent, damaged, or corroded enough to give a false signal. 9. You should also realize that there are many good targets which are not classified by the CZ-20. -
Page 28: Recovery Tools
RECOVERY TOOLS Sand scoops designed especially beachcombers and shallow- water treasure hunters are available at metal detector outlets. 2. Divers use a variety of recovery tools, depending on the condition of the sea bed or lake bottom. A sturdy dive knife will suffice in packed mud or small rocks. -
Page 29: False Signals
FALSE SIGNALS A “false signal” occurs when a target is incorrectly identified. For example , a small, broken-off piece of pull tab may be identified as a nickel. Or a small, deep coin, especially in mineralized soil, may read “IRON.” The more sensitive the metal detector, the harder it is not to have false signals. - Page 30 FALSE SIGNALS sensitivity level, taking shorter, slower sweeps, or increasing the discrimination level may reduce the number of false signals caused by trash. 2. Deep Targets: Deep targets, just barely within the range of the CZ-20, may be misidentified. For example, a deep coin may I.D.
- Page 31 FALSE SIGNALS number of false signals caused by salt water by lowering your sensitivity and making sure you are ground balanced properly. 7. Hot Rocks: Some rocks, by virtue of their high mineral content, will be seen by metal detectors as a metal target.
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Page 32: Operating Tips
FALSE SIGNALS 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 over the target if you sweep at right angles to your original position. - Page 33 OPERATING TIPS 3. Recheck your ground balance occasionally. 4. 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” I.D., 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.
- Page 34 OPERATING TIPS 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. 8. If you’re in a relatively non-trashy area, try searching in the Autotune mode and then identifying your targets by switching to DISC = “0.”...
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Page 35: Battery Replacement
Practice pinpointing. Reread the appropriate part of this manual if you’re having problems. For even more “how-to” information, see your Fisher dealer for “Advanced Treasure Hunting with the Fisher QuickSilver Series Metal Detectors” an 88- page, illustrated book by CZ expert Andy Sabisch. - Page 36 BATTERY REPLACEMENT 1. Remove the battery door by partially unscrewing the two knurled thumb screws with a coin or screwdriver. (The knurled knobs are “captive screws” and do not have to be completely removed from the battery door.) 2. Remove the battery pack from the Control Housing.
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Page 37: Maintenance
MAINTENANCE Your CZ-20 doesn’t require a lot of care. It’s built with high-quality 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. Storage 1. -
Page 38: Treasure Hunters Code Of Ethics
TREASURE HUNTER’S 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. -
Page 39: Where To Use Your Metal Detector In The U.s
Where To Use Your Metal Detector In The U.S. National Forest and Federal Lands—Metal detecting is allowed only by special permit acquired from the federal government. Each area has a district office. Corps of Engineers, Lakes, Shorelines and Lands—Permission has been granted only on predisturbed sites, such as beaches and attached swimming areas. -
Page 40: Specifications
SPECIFICATIONS Length Extended ................50" Collapsed ..................30" 8" Coil ....................10.5" Coil 5" ....................Coil Weight 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. Control Housing ................ - Page 41 1. Subject to improvement or modification without notice. 2. Approximate. 3. Pulsegate Unipolar Audio Processing. Advanced Fisher circuitry which allows silent operation below “audio threshold tone” with no loss in sensitivity. 4. The 1212-X is a “motion” detector while in the search mode. The search coil must be moving at least slightly to detect a target.
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Page 42: Service
R E P U T A T I O N Fisher produced the first patented metal detector in 1931. For over 70 years, the Fisher logo has been a mark of excellence. L I F E T I M E W A R R A N T Y...
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