Metal Detector MD-88

Metal Detector MD-88
OWENER’S MANUAL
MD-88
Please read before using this equipment
Metal Detector
MD-88
MAIN TECH PARAMETER
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Emitting Frequency
6.99KHz
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Signal Frequency
437KHz
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Weight
CARE AND MAINTENANCE
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3.5KG
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Power Supply
8pcs 1.5V Batteries
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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
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Sensitivity
Small coil: 25-30cm (test 25 US
cent)
Big coil: 35-40cm (test 25 US
cent)
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Accessories
Earphone, Charger
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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.
OUTDOOR TESTING AND USE
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CHARGING
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.
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.
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).
With your MD-88 Metal Detector, you
can hunt for coins, relics, jewelry,
gold, and silver, etc, just about
anywhere. The metal detector is
versatile and easy to use.
Charging
1. Rechargeable, Battery Life L.E.D
lights, charging indicator lights.
2. Full-control Ground Balance.
3. Unlike any other metal detector on
the market today, MD88 could
distinguish Ferrous and Non Ferrous
metal
4. Be capable of remarkable depth and
extreme sensitivity in the worst
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.
Lifetime Service.
10. Headphone Jack – lets you
connect headphone to the detector.
11. Waterproof Search Coil – lets you
use the detector’s length for
comfortable use.
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
12. Adjustable Stem – lets you adjust
the detector’s length for comfortable
use.
Note: your metal detector requires 8
pieces of 1.5 V batteries.
The detector’s features include:
TREASURE HUNTER’S CODE OF
ETHICS
All treasure hunters might be judged
by the example you set. Here are a few
basic rules you should follow while
using your detector.
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Always get permission before
searching any site.
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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
was. Fill in any hole you dig.
Use your detector only in safe
areas.
Dispose of any junk you find, only
in approved areas. Do not leave it
for the next treasure hunter to
find.
PARTS AND NAMES
Armrest
Controller
Unit
Handle
Assembly
Meter and
Pointer
DISCRIMINATION TURN BUTTON
DETECTION NOTES
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.
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.
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
the
“DISCRIMINATION”
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.
2. Adjust the search coil’s angle so
the flat part faces the ceiling.
Note:
Never test the detector on a floor
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.
Upper Stem
Battery
Room
Lower Stem
Stem
Lock Nut
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.
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.
Search
Coil
Search
Coil Knob
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GROUND BALANCE MODE
DISCRIMINATION MODE
QUICK START
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.
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.
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.
Follow these steps to set it
1) Turn on the switch;
2) Set the MODE to “GROUND
BALANCE”;
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.
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:
4) Set “GROUND BALANCE”
as mentioned above;
5) Sweep the search slowly along
the ground and keep 8inch above
the ground.
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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
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INSTALLING BATTERIES……………………………………………..7
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ADJUSTING THE METER……………………………………………..8
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USING HEADPHONES………………………………………………. .8
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ZEROING BUTTON…………………………………………………….9
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TRAFFIC SAFETY……………………………………………………...9
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FUNCTION REGULATOR SWITCH………………………………….10
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SENSITIVITY TURN BUTTON…………………….............................11
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OPERATION WORKING MODE SWITCH………………..................12
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FREQ TUNE TURN BUTTON………...................................................13
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DISCRIMINATION TURN BUTTON…………....................................14
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GROUND BALANCE MODE................................................................15
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DISCRIMINATION MODE…………....................................................15
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DISCRIMINATION TURN BUTTON……............................................16
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DETECTION NOTES………………......................................................16
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OUTDOOR TESTING AND USE...........................................................17
DISCRIMINATION TURN BUTTON
Set Working Mode Switch to
GROUND BALANCE, and then turn
the GROUND BALANCE turn
button.
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:
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CHARGING………… ............................................................................17
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MAIN TECH PARAMETER...................................................................18
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CARE AND MAINTENANCE ...............................................................18
The discrimination Turn button is
used when MODE is set to
“DISCRIMINATION”.
Put detector on the table, or far
away from ground place, using
one coin to test if there is sound
changing.
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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FREQ TUNE TURN BUTTON
PREPARATION
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.
3)
Follow these steps to set “Ground
Balance Point”:
1) Push Regulator Switch to
Setting, and push Working
Mode Switch to Ground
Balance;
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”.
2)
Stop the search coil about
24inch above the ground, set
the “critical sound”;
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.
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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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.
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.
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.
Cautions:
The search coil’s plug fits into
the connector only one way.
Do not force the plug or you
could damage it.
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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.
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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
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
OPERATION WORKING MODE SWITCH
You need 8 pieces of 1.5V
batteries to power your detector.
Cautions:
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Use only fresh batteries of the
required size and recommended
type.
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Do not mix old and new
batteries, different types of
batteries (standard, alkaline, of
rechargeable), or rechargeable
batteries of different capacities
3. Place 8 pieces of 1.5V battery
into the battery compartment on
top of the ribbon, matching the
polarity symbols (+and -).
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
signal). To solve such problem,
Ground Balance Circuit is
designed
to
decrease
the
“mineralization reaction” to the
lowest.
1. If the detector is ON, turn it to
OFF.
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
detector directly, without removing
the batteries.
2. Unscrew
the
battery
compartment screws. And take
out battery compartment.
Set MODE to “GROUND
BALANCE”,
the
detector
responds to all metals, has no
discrimination function, but can
eliminate
the
effect
of
“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.
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.
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”.
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.
ADJUSTING THE METER
USING HEADPHONES
Cautions:
Always remove old or weak
batteries; batteries can leak
chemicals that can destroy
electronic parts.
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If you do not plan to use the
detector for a week or more,
remove the batteries.
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Dispose of old batteries
promptly and properly.
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If low power, Low Batt light
will be shining, and that
means you should change
batteries or charge.
Using headphones also save
battery power and makes it easier
to identify subtle in the sounds
you hear, for better detection
results.
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To connect headphones to the
detector, insert the headphones’
plug into the headphone jack on
the side of the control housing.
The detector’s internal speaker
disconnects when you connect
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
FUNCTION REGULATOR SWITCH
Once you set the volume, do not
increase it. Over time, your ears
adapt to the volume level, so a
volume level that doesn’t cause
discomfort might still damage your
hearing.
Zeroing Button has memory function,
so it can memorize the working
circumstance at working time. For
example, while holding the search coil
over the ground, the ground emits
signal to make the pointer leave
“0”position, you can return it to “0” by
pressing the Button again. Then you
can begin detecting.
Traffic Safety
Do not wear headphones while
operating your detector near
high-traffic areas.
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.
Even though some headphones are
designed to let you hear some
outside sounds when listening at
normal volume levels, they still can
present a traffic hazard.
SENSITIVITY TURN BUTTON
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.
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.
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.
FUNCTION
SWITCH
Sensitivity Turn Button controls the
sensitivity of the detector.
REGULATOR
Don’t press the Zeroing Button near
metal, or the detector can not detect
metal any longer.
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.
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.
Function Regulator including
Setting and Normal function
selections.
Setting: When adjusting Ground
Balance, Discrimination, and
Sensitivity, you should select
Setting.
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Generally on normal ground area,
you can adjust Sensitivity higher,
then it can detect deeper, and detect
small and big detecting targets
accurately.
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