OWENER’S MANUAL

Please read before using this equipment

MD-88

Metal Detector

MD-88

MAIN TECH PARAMETER

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Emitting Frequency

6.99KHz z z

Signal Frequency

437KHz

Weight

3.5KG z z z z

Power Supply

8pcs 1.5V Batteries

Max Detection

Small coil: 1.5meters

Big coil: 3.0-5.0meters

This conclusion is elicited by testing an aluminum sheet

(60cm*60cm*1cm) buried in dry soil

Sensitivity

Small coil: 25-30cm (test 25 US cent)

Big coil: 35-40cm (test 25 US cent)

Accessories

Earphone, Charger z z z z z z

CARE AND MAINTENANCE

If the detector doesn’t work properly, it is possible that the batteries haven’t enough power, replace or charge batteries to try ;

Place batteries matching the polarity symbols (+ and －) If you won’t use it for a long time, take out the batteries to avoid pureness;

The search coil’s plug should be not affected with damp, or the detector will loss detection ability; the plug can be used only after drying in such condition;

The detector is prohibited to work in rainy day and in burning sun;

The search coil should be far away from furnace and other high temperature circumstance;

Each detector is attached a piece of guarantee and it is free to be repaired during the length of warrantee unless he circuit is changed by user himself.

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OUTDOOR TESTING AND USE CHARGING

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Notes:

The search coil will not detect without motion. You must move the object since you are not sweeping with the detector at this time.

Try finding other metal in the area.

When you find a metal item, wait a few seconds after the tone stops before continuing, to allow the detector time to reset (or, press the

Zeroing Button to return the pointer to “0” position). z

If you are using a coin, the detector detects it more easily if you hold it so a flat side (not the edge) is parallel with the flat side of the search coil.

Charging

When the Low Batt is shining, you should remove batteries, if you use rechargeable batteries, you can use charger to charge directly. 1. Find an area on the ground outside where there is no metal.

Place a sample of the material you want the detector to find (such as a gold ring or a coin) on the ground.

(If you are using valuable metal such as gold to test the detector, mark the area where you placed the item, to help you find it later. Do not place it in tall grass or weeds.)

2. While holding the search coil level and about 8 inches above the ground slowly move the search coil over the area where you placed the sample, sweeping the search coil in a side to side motion.

Note: Before you charge or remove

batteries, make sure the detector is off.

You can also use 12v external power supply.

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FEATURES

With your MD-88 Metal Detector, you 12. Adjustable Stem – lets you adjust can hunt for coins, relics, jewelry, the detector’s length for comfortable gold, and silver, etc, just about use. anywhere. The metal detector is versatile and easy to use.

Note: your metal detector requires 8

pieces of 1.5 V batteries.

The detector’s features include:

TREASURE HUNTER’S CODE OF

1. Rechargeable, Battery Life L.E.D

ETHICS

lights, charging indicator lights.

2. Full-control Ground Balance. All treasure hunters might be judged

3. Unlike any other metal detector on by the example you set. Here are a few the market today, MD88 could basic rules you should follow while distinguish Ferrous and Non Ferrous using your detector. metal

4. Be capable of remarkable depth and extreme sensitivity in the worst z

Always get permission before

searching any site. grounds.

5. Waterproof 15" search coil. Other accessory 12" coil available.

6. Threshold Control. Accurately adjust the audio to hear the smaller, deeper signals.

7. Frequency Control adjusts for hunting near power lines, microwave or other environmental interference.

8. English Panel, easy operation

9. Two-year Parts and Labor Warranty. z z z z

Respect the rights and property of

others.

Observe all national, state, and local laws while treasure hunting.

Never destroy historical or archaeological treasures. If you are not sure about an object you have found, contact a museum or historical society in your area.

Leave the land and vegetation as it

Lifetime Service. was. Fill in any hole you dig.

10. Headphone Jack – lets you z

Use your detector only in safe connect headphone to the detector.

11. Waterproof Search Coil – lets you z

areas.

Dispose of any junk you find, only use the detector’s length for comfortable use. in approved areas. Do not leave it for the next treasure hunter to find.

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Battery

Room

Stem

Lock Nut

Search

Coil

Search

Coil Knob

PARTS AND NAMES

Armrest

Controller

Unit

Handle

Assembly

Meter and

Pointer

Upper Stem

Lower Stem

DISCRIMINATION TURN BUTTON

If detect indoor or search very trashy ground, there are a lot of metal trash, they are usual no use and can be eliminated during the detection.

For example, in an area full of iron nails, the iron nail’s signals can interfere the detection, to solve such problem, you can firstly put a iron nail on the ground and let the search coil sweep over it, if the sound increase, press the button and rotate clock-wise a little, relieve the button and try again; adjust repeatedly until the sound doesn’t change when the detector sweeps over the iron nail.

After adjusting, the detector doesn’t respond to iron nails and ferrous metals whose size are smaller than iron nail buried in the ground, but it can respond to all non-ferrous metals and ferrous metals whose size are bigger than iron nail.

DETECTION NOTES

INDOOR TESTING AND USE

1. Remove any watches, ring, or other metal jewelry you are wearing, and then place the detector on a wooden or plastic table.

2. Adjust the search coil’s angle so the flat part faces the ceiling.

Note:

inside building.

Most buildings have metal of some kind in the floor, which might interfere with the objects you are testing or mask the signal completely.

Move a sample of the material you want the detector to find (such as a gold ring or a coin) about 2cm above the search coil.

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GROUND BALANCE MODE DISCRIMINATION MODE

This mode can eliminate the

“mineralization reaction” and has better penetrability, so this mode is preferentially selected wherever indoor or outdoor search. In this mode, as long as the search coil is moved right over the target, the detector sounds and the view meter indicates the change, any type of metal raises the volume.

This mode is used to distinguish ferrous metal and non-ferrous metal, to select bigger metal and to eliminate smaller ones between the same types of metals. This mode hasn’t “GROUND BALANCE” function, so the “mineralization reaction” is heavy, the operator should use it carefully.

Follow these steps to set it

1) Turn on the switch;

2) Set the MODE to “GROUND

BALANCE”;

Follow these steps to set it:

1) Turn on the switch;

2) Set “MODE” to

“DISCRIMINATION”;

3) Preheat;

4) Set the “critical sound”;

5) Distinguish the ferrous and non-ferrous metal.

3) Stop the search coil 24inch above the ground, press and relieve the “Zeroing Button” for several times to preheat the detector until the pointer returns to the “0”; Set the “critical sound”;

Use the discrimination turn button turn to MIN position. The pointer will rotate to right when you detect the ferrous metal, simultaneously, the detector sound will rise.

4) Set “GROUND BALANCE” as mentioned above;

If you turn the discrimination turn button to MAX position, the pointer will rotate to right when you detect the non-ferrous metal, simultaneously, the detector sound will rise. Eliminate unneeded target: 5) Sweep the search slowly along the ground and keep 8inch above the ground.

QUICK START

1. Prepare: holding the detector, keeping the coil perpendicular to the ground and over far away from ground. Turn on MD-88 detector, and waiting for 30 seconds.

5. Push Regulator Switch to Setting, push Working Mode Switch to

Discrimination, If the point is not at 0 scales, then turn Ground Balance

Switch from left to right to make sure

Sensitivity Meter point at 0 scales.

2. Note Sensitivity Meter point, to check if the point at 0 scale. If the point is not at 0 scales, press the red button for several times to make sure the point at 0 scales.

6. Push Regulator Switch to Normal.

And Push Working Mode Switch to

Discrimination.

3. Turning Sensitivity Switch from left to right, setting the switch at middle, then turn FREQ Tune switch from left to right, the sound rises, falls, or disappears, stop at critical sound, when the sound is just listened between falling and disappearing that is Ok.

7. Keep coil paralleling to the ground, and 20cm far away from ground.

You are now ready to start searching.

4. Push Regulator Switch to Setting, and push Working Mode Switch to

Ground Balance, If the point is not at

0 scales, then turn Ground Balance

Switch from left to right to make sure

Sensitivity Meter point at 0 scales.

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CONTENTS

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PREPARATION........................................................................................6 z

INSTALLING BATTERIES……………………………………………..7 z

ADJUSTING THE METER……………………………………………..8 z

USING HEADPHONES………………………………………………. .8 z

ZEROING BUTTON…………………………………………………….9 z

TRAFFIC SAFETY……………………………………………………...9 z

FUNCTION REGULATOR SWITCH………………………………….10 z

SENSITIVITY TURN BUTTON…………………….............................11

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OPERATION WORKING MODE SWITCH………………..................12 z

FREQ TUNE TURN BUTTON………...................................................13 z

DISCRIMINATION TURN BUTTON…………....................................14 z

GROUND BALANCE MODE................................................................15 z

DISCRIMINATION MODE…………....................................................15 z

DISCRIMINATION TURN BUTTON……............................................16 z

DETECTION NOTES………………......................................................16 z

OUTDOOR TESTING AND USE...........................................................17 z

CHARGING………… ............................................................................17 z

MAIN TECH PARAMETER...................................................................18 z

CARE AND MAINTENANCE ...............................................................18

DISCRIMINATION TURN BUTTON

Set Working Mode Switch to

GROUND BALANCE, and then turn the GROUND BALANCE turn button.

The discrimination Turn button is used when MODE is set to

“DISCRIMINATION”.

When we rotate the

“DISCRIMINATION” to different position, we can distinguish between ferrous metal and non-ferrous metal by direction to which meter pointer swings.

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NOTE: Push Regulator Switch to

Setting, push Working Mode Switch to Discrimination, If the point is not at 0 scales, then turn Ground

Balance Switch from left to right to make sure Sensitivity Meter point at

0 scales.

Testing:

Put detector on the table, or far away from ground place, using one coin to test if there is sound changing.

FREQ TUNE TURN BUTTON

Rotate the ground balance turn button to MAX, raise the search coil, then lower it after setting the

“critical sound”, the volume rises;

Rotate the turn button to MIN, then do as above, the sound falls. This experiment confines that the volume changes while rotating GROUND between two sides of the scale, so there must be a point at which the sound keeps steady, this point is the

“ground balance point” we set.

Follow these steps to set “Ground

Balance Point”:

1) Push Regulator Switch to

Setting, and push Working

Mode Switch to Ground

Balance;

2) Stop the search coil about

24inch above the ground, set the “critical sound”;

3) Lower the search coil about

8inch above the ground; if the volume rises, raise the search coil (about 24inch) and rotate the turn button counter clockwise to try, if the volume falls, rotate it counter-clockwise a little till the sound gets steady. If the volume falls when we do as above, rotate it clockwise till the sound gets steady.

4) No matter you tune the volume, it still rises, witch expresses there are metals in this area, try another area to adjust.

5) Press the “Zeroing Button” firstly before raising the search coil to set the

“Ground Balance”, lower the search coil after tuning the

“Ground Balance” and relieving the “Zeroing

Button”.

The detector eliminates the

“mineralization reaction” signal after setting “Ground Balance” as above, the searching coil can sweep the ground freely and only sounds while finding metal.

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PREPARATION

ASSEMBLING THE DETECTOR

Assembling your detector is easy and requires no special tools. Just follow these steps.

1.Turn the stem’s lock nut clockwise until it loosens.

5.Wind the search coil cable around the stem. Leave enough slack in the cable to let you adjust the search coil when you are hunting on uneven ground.

6.Insert the search coil’s plug into the search coil jack on the detector’s control housing. Be sure the pins on the plug align with the holes in the jack.

2.Lengthen or shorten the stem so when you stand upright with the detector in your hand, the search coil is level with and about 8 inches above the ground with your arm relaxed at your side.

3.Turn the stem’s lock nut counterclockwise to lock it in place.

4.Unscrew the knob on the search coil and remove the knobs and connector. Insert the stem and align the holes on the search coil bracket and the stem. Push the connector through the holes and tighten the knob

Cautions:

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The search coil’s plug fits into the connector only one way.

Do not force the plug or you z could damage it.

To disconnect the search coil’s cable from the detector, grasp the plug and pull it out of the connector. Never pull on the cable.

7.Loosen the knob at the search coil’s end, and then adjust the search coil to the desired angle.

(The search coil should be parallel with the ground.) Tighten the knob just enough to keep the search coil from rotating or wobbling.

Caution: Do not over tighten the

search coil or use tools such as pliers to tighten it.

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INSTALLING BATTERIES

You need 8 pieces of 1.5V batteries to power your detector. z z

Cautions:

Use only fresh batteries of the required size and recommended type.

Do not mix old and new batteries, different types of batteries (standard, alkaline, of rechargeable), or rechargeable batteries of different capacities

1. If the detector is ON, turn it to

OFF.

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3. Place 8 pieces of 1.5V battery into the battery compartment on top of the ribbon, matching the polarity symbols (+and -).

4. Replace battery compartment and tighten the screws.

5. Testing batteries: If Low Batt light is shining replaces the batteries, or if you use rechargeable batteries, you can charge the compartment screws. And take the batteries.

out battery compartment.

OPERATION WORKING MODE SWITCH

There are two sections in operation mode switch, one is

GROUND BALANCE, and the other is “DISCRIMINATION”.

GROUND BALANCE TURN

BUTTON

Set Working Mode Switch to

GROUND BALANCE, and then turn the GROUND BALANCE turn button.

Owing to The “mineralization reaction”, the search coil of old-style metal detector emits false signal, and the “critical sound” is affected by the change of the distance between the search coil and the ground, so you can’t distinguish the type of the signal

(mineralization signal or metal

Set MODE to “GROUND signal). To solve such problem,

BALANCE”, the detector

Ground Balance Circuit is responds to all metals, has no designed to decrease the discrimination function, but can

“mineralization reaction” to the eliminate the effect of lowest.

“mineralization reaction”, has enough penetrability, works steadily, and indicates properly, so, this mode is usually selected at the beginning of detecting some area.

Set MODE to

“DISCRIMINATION” the detector can distinguish the type of the metal and select the bigger and valuable metal.

Push Regulator Switch to Setting, and push Working Mode Switch to

Ground Balance, If the point is not at 0 scales, then turn Ground

Balance Switch from left to right to make sure Sensitivity Meter point at 0 scales.

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FREQ TUNE TURN BUTTON

On mine area, mineralization reaction will influence the detecting result, and then you can turn

Sensitivity counter-clockwise to lower sensitivity to reduce the mineralization reaction, to detect accurately.

FREQ TUNE TURN BUTTON

Adjust the FREQ TUNE clockwise, the sound rises slowly, the sound which just can be heard is called

“critical sound”. The detector has the highest sensitivity when it is at

“critical sound”.

Note:

Press the Zeroing Button before adjusting the “critical sound” and set free it after adjusting.

If the “critical sound” rises, falls, or disappears.

To set sensitivity depends on the testing circumstance, but not the higher, the better.

For example, in those heavy mineralization areas, high sensitivity causes false signal, the detector sounds everywhere so that the detector can’t find target correctly. In such condition, lower the sensitivity to reduce the effect caused by complex soil; in those pure areas, the higher the sensitivity, the stronger the detection.

Note: Press the Zeroing Button to make sure the point at 0 scales before adjusting the sensitivity.

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ADJUSTING THE METER USING HEADPHONES

Cautions:

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Using headphones also save

Always remove old or weak battery power and makes it easier z batteries; batteries can leak to identify subtle in the sounds chemicals that can destroy you hear, for better detection electronic parts.

If you do not plan to use the results. detector for a week or more, To connect headphones to the z z remove the batteries. detector, insert the headphones’

Dispose of old batteries plug into the headphone jack on promptly and properly.

If low power, Low Batt light the side of the control housing. will be shining, and that The detector’s internal speaker means you should change disconnects when you connect batteries or charge. headphones.

ADJUSTING THE METER

When turn on the detector, with

Regulator Switch to Normal, note

Sensitivity Meter point, to check if the point at 0 scale. If the point is not at 0 scales, press the red button

(Zero Button) for several times to make sure the point at 0 scales.

Listening Safely

To protect your hearing, follow these guidelines when you use headphones.

Set the volume to the lowest setting before you begin listening. After you begin listening, adjust the volume to a comfortable level.

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Do not listen at extremely high volume levels. Extended high volume listening can lead to permanent hearing loss.

ZEROING BUTTON

Once you set the volume, do not Zeroing Button has memory function, increase it. Over time, your ears so it can memorize the working adapt to the volume level, so a circumstance at working time. For volume level that doesn’t cause example, while holding the search coil discomfort might still damage your over the ground, the ground emits hearing. signal to make the pointer leave

“0”position, you can return it to “0” by

Traffic Safety

pressing the Button again. Then you

Do not wear headphones while can begin detecting. operating your detector near high-traffic areas. When turn on the detector, with

Regulator Switch to Normal, note

Even though some headphones are Sensitivity Meter point, to check if the designed to let you hear some point at 0 scale. If the point is not at 0 outside sounds when listening at scales, press the red button (Zero normal volume levels, they still can Button) for several times to make sure present a traffic hazard. the point at 0 scales.

ZEROING BUTTON

Zeroing Button is at the forefinger’s position when holding the detector.

Press it, the pointer of the view meter returns to “0” position.

Don’t press the Zeroing Button near metal, or the detector can not detect metal any longer.

FUNCTION REGULATOR SWITCH SENSITIVITY TURN BUTTON

During detection, with the changes of environment, the pointer often leaves “0” position.

Pressing Zeroing Button to return the pointer to “0”, so you must often press it during the detection process.

Normal: Adjust Sensitivity, you can select Normal. And before you turn on the detector, you should make sure the switch is at Normal, then adjust the Zero Button, to make sure the point at 0 scales.

SENSITIVITY TURN BUTTON

The detector need about 30 seconds to preheat after turning on the detector, or the pointer will leave “0” after pressing the

Zeroing Button. All will be normal after preheating.

Sensitivity Turn Button controls the sensitivity of the detector.

FUNCTION REGULATOR

SWITCH

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Function Regulator including

Setting and Normal function selections.

Setting: When adjusting Ground

Balance, Discrimination, and

Sensitivity, you should select

Setting.

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Rotate it counter-clockwise to the end point, the sensitivity is MIN and the detection depth is MIN; rotate it clockwise to the end point, the sensitivity is MAX and the detection depth is MAX.

Generally on normal ground area, you can adjust Sensitivity higher, then it can detect deeper, and detect small and big detecting targets accurately.