Nalanda MD027 Bedienungsanleitung

MD027 Metal Detector

Owner’s Manual

The detector is a metal detector with both motion and non-motion modes. In the

motion mode, it has higher sensitivity, and it has dierent colors of LED to indicate

metal types, helping the operator to nd lost coins, gold/silver jewels, and other metal

objects. In the non-motion mode, the operator can move the search coil slowly. The

detector has good waterproof function, it is suitable for detection underwater, so

operators can enjoy the pleasure of exploration under water.

Read this manual carefully before using. Most importantly, review the Quick-Start

TABLE OF CONTENTS

Specication

Assembly

Battery

Panel and LCD

Controller

Quick-start

Field Skills

Caution

Maintain

TROUBLESHOOTING GUIDE

Specication

Operation frequency: About 2.4KHZ

Operation mode: Motion-ALL-METAL, DISC,Non-motion

Target display: Red / green / blue LED indicates three kinds of metals

Low, medium, high sound indicates three kinds of metals

Discrimination adjustment: Yes

Sensitivity adjustment: Yes

Search coil: 210mm or 250mm

Earphone: Piezoelectric

Arm length adjustment: 100cm-120cm

Weight: About 2kg

Work environment: Land, seaside, river, sea

Waterproof: The depth of water is not more than 40 meters

Power supply: 1x9V alkaline battery(battery not supplied)

L0ck Nu t

Assembly

1. Take out the aluminium stem and search coil from the packing box(see Fig.1).

2. Unscrew the lock knob on the search coil,and take o the bolt.Attach the lower

stem to the search coil, and lock it(see Fig.2). Note: the rubber gasket should be

placed properly.

Fig.1

Fig.2

3. Take out the upper stem, the middle stem and the control box from the packing

box.Press the silver button on the upper stem,and insert it into the middle stem.

Let

the silver button align with the two holes of the middle stem. (see Fig.3)

4. Loosen the two triangular fastening screws at the bottom of the control box,

install

the control box on the stem, and lock it. (see Fig.4)

5. Install the bracket arm on the upper stem.The bracket arm has three positions,

loosen the triangle fastening knob under the bracket arm, let the bracket arm

separate up from down.Take o the bracket arm, place it in a certain position, and

then tighten the triangle fastening knob(see Fig.5).

Fig.3

Fig.4

Fig.5

6. Relax the Lock Nut on the middle stem. According to need, the operator can

adjust

the length of the aluminum rod, by aligning the silver button on the lower stem

into

a group of holes on the middle stem. Wrap the cable around the aluminium stem,

tighten moderately, so that the cable does not shake (see Fig.6). Tighten the lock

nut.

Battery

A 9V 6F22 battery is used to power the detector.

1. Set the “SENS” switch at the position of “OFF”.

2. Unscrew the battery cover in the direction of the arrow. Push a 9v 6F22 battery

into

the battery cap, according to the battery polarity symbols. Note: the battery cap

attachment should be placed above, push into the battery box. (see Figure.7)

Install the battery cover. A waterproof rubber washer is installed on the battery

cover, the battery cover should be tightened by hand. If it is detected underwater, a

key is needed to tighten it.(see Figure.8)

Fig.6

Fig.7

Fig.8

Note: If not used for a long time, please remove the battery. In case the leakage of

the battery will destroy the detector. Depending on the battery capacity, a 9V

alkaline battery can be used for more than 20 hours.

Panel and controller

Panel(see Figure.9)

1. POWER-SENS knob

The power switch also acts as sensitivity adjustment. Turn counter-clockwise to OFF,

to turn o the power supply, turn clockwise to turn on the power supply, and turn

up the sensitivity.

2.MODE-DISC knob

The MODE switch also acts as DISC adjustment.

Turn counterclockwise to NON-M, the detector is in non-motion mode. Move the

search coil slowly when in detecting, but it can’t discriminate the metal category.

Turn clockwise to enter motion mode, scan with the search coil, it can discriminate

the metal category. The default mode is the ALL METAL mode, the detector will

respond to all kinds of metals. Rotate the MODE-DISC knob, you can adjust discrimi-

nation type, it will reject the metal type according to gold conductivity from low to

high.

LED and earphone

The operation state and detection result of the detector is indicated by colors of the

LED and earphone. See the table below:

Fig.9

Quick-start

Prepare for three kinds of metal samples

Iron nail

Pull-Tab

25￠silver coin

Lay the detector

Put the detector on a wooden or plastic table, and let the search coil stretch out of

the table above 30cm, Keep it away from walls, ceilings and oors, turn o all kinds

of electrical appliances that cause electromagnetic interference, remove watches

and rings from hands. (see Figure 10).

LED and sound indication table

Color LED Sound State

Green light ashes at

interval

Sound short DU tone at

interval

MOTION works normally.

Red light ashes

quickly

Long low tone In the MOTION mode, it

nds ferrous metal.

Green light ashes

quickly

Long medium tone In the MOTION mode, it nds

medium conductivity metal

such as nickel, tin (5￠,

pull-tab, etc).

Blue light ashes

quickly

Long high tone In the MOTION mode, it nds

high conductivity metal,

such as copper, silver.

Blue light ashes at

interval

Sound short Du tone at

interval

It gets into NON-MOTION

mode.

Blue light ashes

frequency conversion

Frequency conversion tone In the NON-MOTION mode, it

nds metal.

Red light ashes

slowly

Sound short Du tone at

interval

Indicate the operation is

abnormal, and the voltage is

low.

Fig.10

1. Turn On

Rotate the “SENS”knob clockwise to turn on the detector, rotate the “MODE-DISC”

clockwise to the position of DISC. The green light ashes twice , the speaker sound

“dudu”tone. Then the green light ashing and the “Du” tone sound occasionally, the

detector is ready to detect now. Set the “SENS”at the middle position.

2. ALL METAL Mode Test

Set the “MODE-DISC”knob at A-M position. Sweep the three samples above the

search coil 8-10cm respectively, the unit will all respond, the LED will ash with red,

green and blue light respectively, and the speaker will sound low, middle and high

tone (see Figure 11). It is indicated that the detector responds to all kinds of metals.

3. Discrimination function test

Set the "SENS" and "DISC" knobs to the middle position. Sweep the three metal

samples about 8-10cm above the search coil respectively (the sample should be

swept out of the edge of the search coil). When sweeping the pull-tab and the 25￠

coin, the detector responds, the LED gives out green or blue light, the speaker

sounds middle or high tone. When sweeping the iron nail, the detector has no

response. The iron nail is rejected.

Set the "SENS" knob to the middle position, and set the "DISC" knob to the maxi-

mum position of clockwise direction. Sweep the three metal samples about 8-10cm

above the search coil respectively. When sweeping the 25￠coin, the detector

responds, the LED gives out blue light, the speaker sounds high tone. When sweep-

ing the pull-tab and the iron nail, the detector has no response. The pull-tab and the

iron nail are rejected.

4. Sensitivity adjustment function test

Sweep the 25￠coin above the search coil at dierent heights, meanwhile adjust the

sensitivity knob from low to high, the maximum height that the detector detected

will also get larger.

5. NON-MOTION mode test

Rotate the “MODE-DISC” knob to the maximum position counter clockwise, the

Fig.11

balance, the detector gives out blue light and sound DU tone at interval, the detec-

tor enters the NON-MOTION mode. The operator can move the search coil slowly to

detect. Note that in the NON-MOTION mode, the detector does not have the ability

to identify metal categories.

Let the 25￠coin approach the search coil slowly, the detector sounds frequency

conversion tone, and the blue light ashes faster. Until the metal sample is very close

to the central of the search coil, the speaker will sound long tone, and the blue light

will be lighted all the time, entering the saturation. Keep the metal sample immov-

able, switch the MODE-DISC knob once, and the detector balance once, the detector

will resume give out blue light and sound DU tone at interval. Now, you can contin-

ue to detect.

Through learning, you have learned the operation of the detector preliminary. In the

eld, because of the inuence of the soil, sea sand, ore and the electromagnetic eld,

especially under the water, the sensitivity and the discrimination position of the

detector will all change. Repeated test, accumulate experience, to master the

technique of detection gradually, and then realize the happiness of the exploration.

Field Skills

Metal detector is used outdoors. There are too many metals indoors, and all kinds of

electrical equipment that will bring interference signals. So it is not t for using the

detector indoors.

Field detection is more complicated, the composition of the regional soil, the

component, size, shape and the oxidation degree of the underground metals will all

aect the detection results. This chapter is only the general step of the eld detec-

tion. It’s necessary for the operator to practice again and again and accumulate

experience, so as to achieve good results.

When using it in mineralized soil, sea, city dump or other place has strong interfer-

ence, it will give a deviate result in discrimination mode. In this case, it is recom-

mended to bring some samples, such as iron nails, pull-tabs, coins, and silver coins

we said above to have a test. Bury these samples in the soil of the detection area, try

to detect and record the DISC location is detected, then make a comparison to the

place where you actually bury the metals. In this way, it will improve the accuracy of

the target's category and its place.

1. Move the search coil

When moving, you should move the search coil in a steady speed, not unsteadily.

Let the search coil be parallel with about 1/2 inch from the surface, not to swing it

like a pendulum to move it up and down from the ground(See Fig.12,13).

NON-MOTION mode

In water or on the uneven ground, it is dicult to move the search coil quickly.

You can choose the NON-MOTION mode, move the search coil slowly to detect. In

the areas where electromagnetic interference is relatively strong, the NON-MOTION

mode can also be selected. The detector gives out blue light and sound Du tone

occasionally, which means the NON-MOTION mode works normally. If it is found that

the detector doesn’t give out blue light and sound Du ton internally in the NON-MO-

TION mode, it means that there is metal, strong mineralizer or conductive soil

around the search coil. You can switch the MOTION-DISC button one or two times, to

reduce the interference.

Note: If the unit has no interval blue light and “DU” tone in NON-MOTION mode, you

can reduce the interference by switching the MOTION-DISC button one or two times.

Fig.12

Fig.13

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