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. CZ-21 QuickSilver Deep Search, Land and Underwater, Target I.D. Metal Detector 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.
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.............................
TREASURE HUNTERS’ CODE OF ETHICS LET’S 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.
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 strong signal in the searchcoil.
SPECIFICATIONS CONDENSED OPERATING INSTRUCTIONS Length ...................... Extended..................................................... 50” ................................... Collapsed.................................................... 30” Factory Pre-Set “Turn-On-and-Go” Marks 8” Coil 10.5” Coil 5” 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.........................
CONDENSED OPERATING INSTRUCTIONS 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. Using Headphones Using headphones (not supplied) improves battery life, and prevents the sounds from annoying bystanders.
ASSEMBLY 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.
ASSEMBLY Adjustable Arm Rest Upper Stem Screw Hole Figure 3. Screw SETTING UP 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. 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.
SETTING UP 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.
SETTING UP Caution: Hipmounting the CZ-21 control housing is not recommended for underwater use. The search coil cable may become entangled with a submerged object, making it difficult 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). Figure 6.
SETTING UP Hold unit firmly 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 flat stable surface and grasp the unit firmly in one hand and the handle grip firmly 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.
CONTROL PANEL FALSE SIGNALS 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-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.
CONTROL PANEL FALSE SIGNALS 2. 3. 4. 5. 30 I.D. location, your target is probably a piece of iron. Reducing your sensitivity level, taking shorter, slower sweeps, or increasing the discrimination level may reduce the number of false signals caused by trash. Deep Targets: Deep targets, just barely within the range of the CZ-21, may be misidentified. For example, a deep coin may I.D. as iron, or a deep piece of iron may I.D. as a coin.
GROUND BALANCING QUICK G.B. 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-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.
RECOVERY TOOLS 1. Sand scoops designed especially for 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. Most divers prefer to use their hands in loose sand. Professional treasure hunters often use an air hose fed by a surface compressor to blow away loose sand, gravel or mud. 3.
GROUND BALANCING 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. 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. lf you get a sudden bell tone, not preceded by an increasing audio response, you’re probably in some very highly mineralized soil or sand.
TARGET IDENTIFICATION a feel for which target classifications will be the most productive. 13. 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. 14.
SEARCH MODES TARGET I.D. MODE When the DISC control is set in the 0-6 positions, the CZ-21 has the ability to identify many types of small targets and, depending on the discrimination level, reject or ignore most of them. To better understand just how your CZ-21 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. Include some large targets as well: jar lids, soda cans, etc. 2.
TARGET IDENTIFICATION coin. 5. The DISC control provides increments of rejection and identification within the mid- and high-tone target classifications. Take a look at the target I.D. decal on your control housing to see what gets rejected at which DISC point. 6. If you’re getting a high-tone response for example, you may well be over a U.S. coin. If you want to know what kind of coin it is, advance the DISC control to “5.” You know from the I.D.
SEARCH MODES and rejected at “3.” 12. You may expect varying signals over different targets and at different levels of discrimination. Note that as you progressively increase the discrimination level, more and more targets are eliminated. 13. Now switch the DISC control to the AUTOTUNE position and note the completely different kind of response. No tone, just a smoother, solid response over every target. PINPOINTING TARGET IDENTIFICATION Target I.D. with the CZ-21 is quick and simple.
PINPOINTING Target location is quick and easy using the touch pad pinpoint mode. The coil does not have to be moving to get a response in this mode. 1. Whether in Autotune or Target I.D. mode, once the presence of a target is indicated by the “beepbeep” of your CZ-21, simply move the coil away from the target area, and with the coil lightly on the ground or very close to it, press the PINPOINT button. 2. As you bring the coil back into the target area, the audio volume and pitch will increase. 3.
SEARCHING ON LAND OR SHALLOW WATER Impact of sweep speed, ground mineralization, and search mode 1 2 3 4 Figure 12. Search coil detection pattern. 1. Minimum depth a. Very slow or very fast sweep speed b. Highly mineralized soil c. Target I.D. search mode 2. Average depth a. Moderate sweep speed b. Moderately mineralized soil c. Target I.D. search mode 3. Maximum depth a. Moderate sweep speed b. Non-mineralized soil c. Autotune search mode 4.
SEARCHING ON LAND OR SHALLOW WATER Impact of sweep speed, ground mineralization, and search mode 1 2 3 4 Figure 12. Search coil detection pattern. 1. Minimum depth a. Very slow or very fast sweep speed b. Highly mineralized soil c. Target I.D. search mode 2. Average depth a. Moderate sweep speed b. Moderately mineralized soil c. Target I.D. search mode 3. Maximum depth a. Moderate sweep speed b. Non-mineralized soil c. Autotune search mode 4.
PINPOINTING Target location is quick and easy using the touch pad pinpoint mode. The coil does not have to be moving to get a response in this mode. 1. Whether in Autotune or Target I.D. mode, once the presence of a target is indicated by the “beepbeep” of your CZ-21, simply move the coil away from the target area, and with the coil lightly on the ground or very close to it, press the PINPOINT button. 2. As you bring the coil back into the target area, the audio volume and pitch will increase. 3.
SEARCH MODES and rejected at “3.” 12. You may expect varying signals over different targets and at different levels of discrimination. Note that as you progressively increase the discrimination level, more and more targets are eliminated. 13. Now switch the DISC control to the AUTOTUNE position and note the completely different kind of response. No tone, just a smoother, solid response over every target. PINPOINTING TARGET IDENTIFICATION Target I.D. with the CZ-21 is quick and simple.
TARGET IDENTIFICATION coin. 5. The DISC control provides increments of rejection and identification within the mid- and high-tone target classifications. Take a look at the target I.D. decal on your control housing to see what gets rejected at which DISC point. 6. If you’re getting a high-tone response for example, you may well be over a U.S. coin. If you want to know what kind of coin it is, advance the DISC control to “5.” You know from the I.D.
SEARCH MODES TARGET I.D. MODE When the DISC control is set in the 0-6 positions, the CZ-21 has the ability to identify many types of small targets and, depending on the discrimination level, reject or ignore most of them. To better understand just how your CZ-21 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. Include some large targets as well: jar lids, soda cans, etc. 2.
TARGET IDENTIFICATION a feel for which target classifications will be the most productive. 13. 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. 14.
GROUND BALANCING 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. 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. lf you get a sudden bell tone, not preceded by an increasing audio response, you’re probably in some very highly mineralized soil or sand.
RECOVERY TOOLS 1. Sand scoops designed especially for 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. Most divers prefer to use their hands in loose sand. Professional treasure hunters often use an air hose fed by a surface compressor to blow away loose sand, gravel or mud. 3.
GROUND BALANCING QUICK G.B. 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-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.
CONTROL PANEL FALSE SIGNALS 2. 3. 4. 5. 30 I.D. location, your target is probably a piece of iron. Reducing your sensitivity level, taking shorter, slower sweeps, or increasing the discrimination level may reduce the number of false signals caused by trash. Deep Targets: Deep targets, just barely within the range of the CZ-21, may be misidentified. For example, a deep coin may I.D. as iron, or a deep piece of iron may I.D. as a coin.
CONTROL PANEL FALSE SIGNALS 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-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.
SETTING UP FALSE SIGNALS 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 over the target if you sweep at right angles to your original position.
BATTERY REPLACEMENT SETTING UP 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.
BATTERY REPLACEMENT VERY IMPORTANT Follow these instructions carefully to avoid getting water in the battery compartment. 1. Tuck in the wires. Do not pinch them in the seal when closing. 2. The battery door will capture the battery holder and self-center it as you install the door. 3. Tighten the knobs SECURELY. a. Use a coin. b. Tighten by hand FIRMLY. Use maximum MANUAL force. c. Do Not use a tool. d. Do Not use a screwdriver. Torque Specification is 8 in-pounds. 4.
MAINTENANCE ASSEMBLY 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. Adjustable Arm Rest Your CZ-21 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. Handling Upper Stem Storage Screw Hole 1. Do not drop your detector. 2.
BATTERY DOOR GASKET: ORIENTATION CROSS SECTION A ASSEMBLY Your Fisher CZ-21 requires little assembly. Handle it carefully, care for it regularly, and it will give you years of dependable service. B CASE 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.
CONDENSED OPERATING INSTRUCTIONS 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. 4 Where To Use Your Metal Detector In The U.S.
SPECIFICATIONS CONDENSED OPERATING INSTRUCTIONS Length ...................... Extended..................................................... 50” ................................... Collapsed.................................................... 30” Factory Pre-Set “Turn-On-and-Go” Marks 8” Coil 10.5” Coil 5” 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.........................
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 strong signal in the searchcoil.
TREASURE HUNTERS’ CODE OF ETHICS LET’S 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.
2-Year Limited Warranty The CZ-21 metal detector is warranted against defects in materials and workmanship under normal use for two years from the date of purchase to the original owner. Damage due to neglect, accidental damage or misuse of this product is not covered under this warranty. Decisions regarding abuse or misuse of the detector are made solely at the discretion of the manufacturer. Proof of purchase is required to make a claim under this warranty.
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© 2009 by Fisher Research Labs, Inc.
