Related Manuals for Fisher Research Labs QuickSilver CZ21-8
Summary of Contents for Fisher Research Labs QuickSilver CZ21-8
- Page 1 CZ-21 QuickSilver Deep Search, Land and Underwater, Target-ID Metal Detector Operating Manual...
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Page 2: Table Of Contents
CONTENTS About Your Detector ..............pg. 3 Condensed Operating Instructions ........pg. 5 Headphones ................pg. 6 Assembly ................pg. 7 Setting Up ................pg. 8 For Land or Shallow Water ..........pg. 8 For Diving ................pg. 9 For Hip-mounting ..............pg. 10 Control Panel ................pg. 12 Turn on Procedure ..............pg. -
Page 3: About Your Detector
ABOUT YOUR DETECTOR Your CZ-21 QuickSilver is an all-purpose metal detector engineered for land, beach, salt and fresh-water treasure hunters. Here are some important features: 1. Leak-proof: Submersible to 250 feet. 2. 3-Tone Target-ID: A low tone for iron, a mid-tone for pull tabs, foil and most gold rings, and a high tone for U.S. coins, silver rings and some gold rings. 3. Depth: Patented Fourier domain signal analysis. Two deep-seeking, ground-compensating VLF signals (one at 5 KHz and one at 15 KHz) provide twice as much target information for accurate analysis and identification. 4. Two Search Modes: A silent running, slow motion Target-ID Mode and a hot, Auto-Tune Mode for All Metal searching. 5. V.C.O. - Page 4 ABOUT YOUR DETECTOR 10. Searchcoils: 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 hip-mountable: Cushioned armrest, 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. Unlike most other metal detectors, the CZ-21 uses Fourier Domain signal...
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Page 5: Condensed Operating Instructions
CONDENSED OPERATING INSTRUCTIONS Factory Pre-Set “Turn-On-and-Go” Marks Your CZ-21 QuickSilver is simple to operate. Even so, we strongly recommend that you read this entire manual. You’ll be able to tune your CZ-21 to your specific needs and conditions. Figure 1. Factory pre-set turn-on-and-go marks (circled in red or blue on your CZ-21 control panel) can get you up and running immediately. Salt-water Pre-set Pre-set Audio SENSITIVITY at “3” Boost mark at “5” Fresh- water sensitivity Pre-set at “7” Pre-set Pre-set DISCRIMINATION GROUND at “5” at “4” 1. -
Page 6: Headphones
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 searchcoil 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 The CZ-21 is supplied with permanently attached waterproof headphones. They cannot be removed by the user. If they are damaged or... -
Page 7: Assembly
ASSEMBLY Fisher ® Your Fisher CZ-21 requires little assembly. Handle it carefully, care ® for it regularly, and it will give you years of dependable service. searchcoil 1. Remove the headphone, handle and searchcoil 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 searchcoil to the lower stem. 4. Remove the bolt and wing nut from the searchcoil. Line up the hole in the lower stem between the two holes in the searchcoil “ears.” Attach the coil to the stem with the bolt and wing nut and finger tighten. 5. The armrest may be repositioned for maximum comfort by removing the armrest screw, sliding the armrest to the next screw hole and re-inserting the armrest screw. -
Page 8: Setting Up
ASSEMBLY Upper Stem Adjustable Armrest Screw Hole Screw Figure 3. SETTING UP Figure 4. When searching on land or in shallow water, keep your arm straight and your searchcoil 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. Adjust the stem length and coil angle so the searchcoil 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. Leave enough slack in the coil cable to allow the coil to swivel as far as it can in either direction. The coil wing nut should be tight enough to prevent the coil from moving. -
Page 9: For Diving
SETTING UP 3. You should now be able to move into your “search” position by leaning slightly forward and raising the searchcoil 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. This capability, along with its deep-seeking sensitivity, makes it ideal for underwater treasure hunting and wreck diving. The CZ-21 is waterproof to a depth of 250 feet. Remember, always practice safe diving methods. When diving with your CZ-21, use the shortest stem length possible, with the extra cable wrapped tightly around the stem, as closely as possible to the control housing. -
Page 10: For Hip-Mounting
SETTING UP Caution: Hip-mounting the CZ-21 control housing is not recommended for underwater use. The searchcoil cable may become entangled with a submerged object, making it difficult for the diver to resurface quickly in case of emergency. SETTING UP FOR HIP-MOUNTING For nearly-effortless treasure hunting, the control housing is easily removed from the handle and attached to the belt clip (included). - Page 11 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. “Hip-mounting” 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. Slide the belt clip into grooves on the bottom of the control housing. This is a snug fit, and you’ll have to bend the clip slightly. 2. Unwrap just enough of the coil cable to allow for searching. 3. Slip the control housing onto your belt, left side for right handers, right side for left handers. NOTE: Because of the extreme sensitivity of the CZ-21 searchcoil, hip-mounting the control housing may produce a false signal when the searchcoil reaches the end of its arc (on the side that the control box is attached to your belt).
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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-21 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 AUTO-TUNE position, the CZ-21 is in an All Metal Mode. In this mode, the CZ-21 has a slightly wider and deeper search pattern, however, it lacks the ability to discriminate or identify and reject targets. 3. GROUND: Used to electronically cancel the effects of ground mineralization. Proper use of this control will minimize false ground signals and ensure that the CZ-21 is operating at its maximum potential in just about any ground condition including wet ocean sand. -
Page 13: Turn On Procedure
CONTROL PANEL battery strength. GOOD BATTERIES: Loud, high pitched tone WEAK BATTERIES: Soft, low pitched tone or “ticking” sound BATTERIES NEED REPLACING: No tone During use, the speaker volume will fade and become nearly inaudible before the detector performance is compromised by weak batteries. 5. PINPOINT: Activating the PINPOINT feature with the center- positioned button enters a NO-MOTION Detection Mode. In this mode of operation, the detector will emit a monotone hum whenever metal enters the coil’s field of detection. To use pinpoint, PRESS the button. The pinpoint button will not deflect with pressure; you will feel no movement in the button. A 2nd press of the button will return you to your previous motion detection mode. A moderate pressure, applied briefly to the center of the button, is required. The button requires a 2-second wait between presses. -
Page 14: Touch Pad
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 Auto-Tune or Target-ID Mode. 1. With GROUND control at “10” hold your searchcoil 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 searchcoil to the ground. Rotate the GROUND control clockwise until you hear an audio tone. Then back off to the exact point where the tone disappears. 3. Always ground balance your CZ-21 in the areas you intend to search, whether it’s on land or underwater. 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. -
Page 15: Bobbing
GROUND BALANCING BOBBING METHOD 1. Turn disc knob to “AUTO-TUNE”, this puts you into Auto-Tune Mode. Set the “SENSITIVITY” control so that you just barely hear a threshold hum. Hold the searchcoil 6 to 12-inches over the ground and at least 3-feet away from any metal objects. Do not use the PINPOINT button during any part of this procedure. 2. Lower the coil 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. - Page 16 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. 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. Maintain that coil height as you search.
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Page 17: Search Modes
SEARCH MODES Your CZ-21 has two search modes: Target-ID and Auto-Tune. Both search modes are “motion” modes, meaning the searchcoil must be in motion to detect a target. Unlike other metal detectors, the discrimination level has little, if any, effect on the depth capability of the CZ-21. Note, however, that the All Metal Auto-Tune 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-21. AUTO-TUNE MODE Set the DISC control to AUTO-TUNE, for a very sensitive, wide- scan, All Metal, motion search mode. This mode responds to all metal targets and does not have the ability to identify or reject objects. The Auto-Tune Mode is useful in three situations: 1. Non-Trashy Areas. The Auto-Tune Mode has a wider scan than the ID Mode, reducing changes of missing good targets. Search in the Auto-Tune Mode until you find a target. Pinpoint the target using the PINPOINT button and then switch the DISC control to “0” to identify the target in Target-ID Mode. The DISC control is positioned so that you can switch back and forth between AUTO-TUNE and “0” with a flick of your... -
Page 18: Target-Id
SEARCH MODES TARGET-ID 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. Set the DISC control at “0,” SENS at “5.” Adjust the VOLUME control for a comfortable level when you are over a large target. 3. Ground balance the CZ-21 as in the “Ground Balance” procedure. 4. Hold the searchcoil about 2-inches above and parallel to the ground and move it slowly back and forth across each sample. Remember, the coil must be in motion to get a response. Keep in mind that for accurate Target-ID, the coil center must pass directly over the target. - Page 19 SEARCH MODES 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. Some are more closely identical to the U.S. 5-cent piece; however, the CZ-21 does have the unique ability to separate those signals from the aluminum trash signals. 9. Now increase the DISC control to “1.” You will find that the CZ-21 rejects the small, iron targets and no longer responds with an audio tone. 10. Continue to increase your DISC control, noting that with each successive step up, more and more targets are rejected. At DISC = “4” for example, a “coins-only’ mode will ignore iron, tabs and foil while accepting U.S. coins. 11. The Target-ID decal on the left underside of the control housing graphically displays which items are rejected and accepted at each DISC level. For example, “foil” is placed between DISC = “2” and...
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Page 20: Searching On Land Or In Shallow Water
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 AUTO-TUNE position and note the completely different kind of response. No tone, just a smoother, solid response over every target. SEARCHING ON LAND OR SHALLOW WATER Good search technique is very important to successful treasure hunting. - Page 21 SEARCHING ON LAND OR SHALLOW WATER and/or size of the target. Recommended starting point: VOLUME = “5,” then adjust the volume control for comfort over loud targets. 5. Once the controls are properly set, begin searching by walking slowly and sweeping the searchcoil in a tight semicircle as shown in Figure 9. 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 lightly “scrub” it. 7. Overlap your sweeps by at least 50 percent. Remember, your coil’s search pattern is conical, and if you don’t overlap each sweep you’ll miss the deeper targets.
- Page 22 SEARCHING ON LAND OR SHALLOW WATER Impact of sweep speed, ground mineralization, and search mode 1. Minimum depth a. Very slow or very fast sweep speed b. Highly mineralized soil c. Target-ID search Mode 2. Average depth a. Moderate sweep speed b. Moderately mineralized soil c. Target-ID Search Mode 3. Maximum depth a. Moderate sweep speed b. Non-mineralized soil c. Auto-Tune Search Mode 4. Missed target Many targets well within the range of your Figure 12. Searchcoil detection pattern. CZ-21 will not be detected unless you overlap your sweeps.
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Page 23: Searching Underwater
SEARCHING UNDERWATER The CZ-21 is waterproof to 250 feet, and it operates the same underwater as on land. Some differences in search technique should be noted. 1. Tune your CZ-21 underwater on the bottom as instructed on page 6. Many divers prefer to use the Auto-Tune Mode, in which case you may want to run your threshold tone slightly higher than you would on land. If you’re wearing a hood, you’ll probably have to turn the volume control to maximum. 2. Keep the searchcoil as far away from you and your dive gear as possible. Sweep the searchcoil back and forth in a wide semicircle in front of you to cover the bottom in a methodical manner. 3. Keep the coil parallel and as close to the bottom as possible. Overlap your sweeps at least 50 percent. 4. Recheck your ground balance every 5 to 10 minutes. -
Page 24: Pinpointing
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 Auto-Tune or Target-ID Mode, once the presence of a target is indicated by the “beep- beep” 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. -
Page 25: Target Identification
PINPOINTING TARGET IDENTIFICATION Target-ID with the CZ-21 is quick and simple. Just keep in mind these two rules: 1) You must be in the Target-ID Mode. 2) The center of the searchcoil must pass directly over the target. It’s always a good idea to walk slowly and overlap your sweeps. But if you’re searching a large expanse 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. In trashy areas, to reduce the “masking” effects of trash on nearby good targets, use a shorter and slower sweep pattern. 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 tap the PINPOINT button... - Page 26 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-ID 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 ID decal that if you lose the signal your target is probably a nickel (or something conductive and very similar). If you don’t lose it, go up to “6.” If you lose it at “6,” your target may well be a U.S. zinc penny. If you still get a signal, your target, if it is indeed a coin, will probably be a copper penny, an older silver coin or a clad coin. Most other small targets will be ignored. 7. The same is true of the mid-tone targets: Round pull tabs are rejected at “2,” foil at “3” and rectangular tabs at “4.” If, for example, you’re looking for gold rings in an extremely trashy area, you have the ability to reject at least some of the trash (like iron, round tabs and foil) and still get those rings falling into the rectangular tab and all coin categories. Of course you’ll have to dig rectangular tabs as well. 8. Your CZ-21 will correctly identify most of the targets on your ID decal most of the time, but it can be fooled. Large targets, uneven ground mineralization, good targets lying next to bad targets, deep targets, all of these and more are sources of error. Remember, the CZ-21 is designed to ID small, coin-sized targets only, and even some of these may be deep enough,...
- Page 27 TARGET IDENTIFICATION may fall into just about any category, the smaller nuggets falling on the lower half of the scale. So if you’re not just looking for U.S. coins, you should test some sample targets to determine what level of discrimination you want to work at and what targets you want to dig. 10. 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 searchcoil 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. lf 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.
- Page 28 TARGET IDENTIFICATION 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. If you’re in a relatively non-trashy area, try searching in the Auto-Tune Mode and then identifying your targets by switching to DISC = “0.” You’ll find more and deeper targets this way. And you’ll eliminate almost all false signals. 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...
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Page 29: Target Recovery
TARGET RECOVERY Once you’ve 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, leave uncovered holes or damage the environment either on land or underwater. Generally speaking, divers and beachcombers do little, if any, damage to the environment while recovering small targets. However, if you plan to use your CZ-21 on lawns or in parks, your target-recovery method can be very important. POINTS TO REMEMBER 1. When in doubt, dig. If your CZ-21 can’t quite decide whether a target is good or bad, dig it up. 2. Good things often come in two’s. Or even three’s. 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 two or three times, overlapping your sweeps in an ever-widening circle. Always dig every suspicious sound in the vicinity of a good find. -
Page 30: Recovery Tools
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. For land recovery, a sturdy hunting knife with a 5-inch blade will suffice in most soils. A high quality, double edged “survival” knife is an even better choice (and more expensive) because it will be almost impossible to bend or break. CAUTION: Using a jack knife without a locking blade is a good way to lose a finger. -
Page 31: 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. Your CZ-21 is an extremely sensitive machine, so you’re bound to encounter them. Here are some of the most frequent sources of false signals and what to do about them: 1. Trash: The most common source of false signals. Large or irregular pieces of trash may give good, consistent, high-tone signals. In this case you’ll usually have to dig the target, but with experience you’ll be able to eliminate many of the large targets whose size will be obvious when you go into the Pinpoint Mode. Another false signal response may be a “one- way” or disappearing signal. You’ll sweep over the... - Page 32 FALSE SIGNALS your ID 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. 2. Deep Targets: Deep targets, just barely within the range of the CZ-21, may be misidentified. For example, a deep coin may ID as iron, or a deep piece of iron may ID as a coin. There’s not much you can do to avoid this other than to use your Pinpoint Mode to ensure that you are exactly centered over the target. Or you may reduce your sensitivity level so you just ignore the very deepest targets.
- Page 33 FALSE SIGNALS above. 6. Wet Salt Water Sand: Your CZ-21 should be able to handle most wet sand easily unless it’s black. See Black Sand above. You should able to reduce the 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. In the Auto-Tune Mode, the CZ-21 will respond to most hot rocks. Prospectors must learn to...
- Page 34 FALSE SIGNALS between the beeps, or if you sweep at right angles 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. b) A coin lying in the ground at an angle (as shown) may give a single target response but may pinpoint several inches away from its true location. Check around the inside edges of the hole. If you still don’t find it, enlarge the hole by a couple of inches. c) A large, deep target, like a buried pipe or a manhole cover at 2 feet, will often give a good, strong coin signal. If you’ve dug down a foot and widened your hole several times, give up.
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Page 35: Battery Replacement
BATTERY REPLACEMENT The CZ-21 is powered by four, 9-volt transistor batteries located in the rear section of the control housing. The batteries are sealed off from the electronics so that accidental water leakage into the battery compartment will not damage the circuitry. To replace the batteries: 1. Remove the battery door by partially unscrewing the two knurled thumb screws. The knurled knobs are “captive screws” and are not to be completely removed from the battery door. 2. Remove the battery pack from the Control Housing. It’s not necessary to disconnect the battery lead connector. Be very careful not to put any undue strain on the battery leads. 3. Remove the batteries from the battery pack, and install fresh alkaline batteries. You may also use rechargeable NiCads, but expect about half the battery life. 4. Insert the battery pack into the Control Housing. With your finger, push the top of the battery pack (with the leads) into the Control Housing first, then let the bottom follow. - Page 36 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. If you have removed the gasket, see page 36 for installation instructions. An improperly installed gasket = a water leak! 5. Submerge the detector in water for 1/2 hour. a.
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Page 37: Maintenance
MAINTENANCE 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 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 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 a closed car sitting in the sun or even worse, in the trunk of a car. -
Page 38: Battery Door Gasket: Orientation
BATTERY DOOR GASKET: ORIENTATION CROSS SECTION CASE BATTERY DOOR A = Small side to case B = Large side to battery door Battery door gasket installation Figure 16. The rubber gasket, which fits into the battery door, must be installed with the larger protrusion (B), toward the battery door. If you remove the gasket for cleaning, re-install correctly. Improper installation will result in leakage. -
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 pre-disturbed sites, such as beaches and attached swimming areas. New Corps lakes and lands must be okayed by the main office of the Army Corps of Engineers. Each area has a district office. State Parks and Lands—Some state parks are open to metal detecting, but some are not. Always check with the park ranger before attempting to use your detector. Bureau of Land Management (BLM) Lands—Some areas are open for metal detecting, and some are not. Always check with the district office. -
Page 40: Specifications
SPECIFICATIONS Length ..... Extended ............ 50” ........Collapsed ........... 30” Weight 8” Coil 10.5” Coil 5” Complete (with headset)....5 lb...11 oz. 6 lb...1 oz. 5.4 lb. Handle and Searchcoil ....2 lb...6.9 oz. 2 lb...12.9 oz. 2.1 lb. Control Housing ............... 2.8 lbs. Frequency ....1. Dual, VLF Search 5 KHz and 15 KHz ........2. Audio Target Response Iron ID ....... 200 Hz (Low tone) Foil and Tab ID ..450 Hz (Mid tone) Coin ID 1 KHz (High tone) Auto-Tune ....500 Hz - 1 KHz (V.C.O.) Pinpoint ....500 Hz - 1 KHz (V.C.O.) Operating Modes 1. Auto-Tune . - Page 41 SPECIFICATIONS Batteries ....Separately Sealed Compartment ... Yes ........Type .......... (4) 9V Alkaline ........Life Alkaline ........35-55 hrs........NiCads ..........10-20 hrs. Operating Temperature ..32° - 110° F Faint Target Audio Boost ..Yes Manual Threshold Tuning..In Auto-Tune Mode Target-ID ....... Three tones plus bell tone for large, ..........shallow targets, plus 7 preset DISC..........control settings Notes: 1. Subject to improvement or modification without notice. 2. Approximate. 3. Pulsegate Unipolar Audio Processing. Advanced Fisher circuitry which allows ®...
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Page 42: Treasure Hunters' Code Of Ethics
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 check Federal, State, County and local laws before searching. • Respect private property and do not enter private property without the owner’s permission. • Take care to refill all holes and leave no damage. • Remove and dispose of any and all trash and litter found. • Appreciate and protect our inheritance of natural re- sources, wildlife and private property. • Act as an ambassador for the hobby, use thoughtful- ness, consideration and courtesy at all times. • Never destroy historical or archaeological treasures. • All treasure hunters may be judged by the example you set; always conduct yourself with courtesy and consid- eration of others... -
Page 43: Warranty
Labs for ® a Return Authorization (RA) Number. Reference the RA number on your package and return the detector within 15 days of calling to: Fisher Research Labs, Inc. 1120 Alza Drive El Paso, TX 79907 Phone: 915-225-0333 ext. 118... - Page 44 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.
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