SIRCHIE MD700 Handbuch

TI5.08-593ENG-REV1

SIRCHIE®

Finger Print Laboratories

100 HUNTER PLACE

YOUNGSVILLE, NC 27596 USA

Phone: (919) 554-2244, (800) 356-7311

Fax: (919) 554-2266, (800) 899-8181

Website: www.sirchie.com

E-mail: [email protected]

Getting Started

The MD700 is shipped

in 3 easy-to-assemble parts

(shown to the right): Upper

Handle, Extender Stem, and

Lower Search Coil Stem.

The only adjustments re-

quired after assembly of

the unit are the angle of the

search coil and the length of

the stem. Familiarize your-

self with the components of

the assembled unit shown

here before proceeding.

TECHNICAL INFORMATION

Metal Detection Sweeper

Catalog No. MD700

Control Panel

Cable Connector

Battery Access (2)

Search Coil Cable

Waterproof

ESI Shielded

Search Coil

Nylon Bolt

& Wing Nut

Hand GripPadded Armrest

Slip Nuts (2)

Extender Stem

Lower Search

Coil Stem

Initial Assembly and Setup

1. Carefully unpack the MD700. Save the carton and inserts for

future storage or shipment.

2. Note that the search coil cable is permanently attached to the

search coil. Be careful not to put any undue strain on it.

3. Insert the upper handle stem into the extender stem while

depressing the lock button. Push together until the lock button

lines up with the hole on the extender and locks. Twist the slip

nut to tighten this connection.

4. Insert the lower search coil stem into the other end of the STEP 3

TI5.08-593ENG-REV1

extender stem while depressing the lock button. Push together

until the lock button lines up with the appropriate hole on the

extender and locks at the desired length of the shaft. Twist the

slip nut to tighten this connection. NOTE: This slip nut can also

be used to lock the lower search coil stem at a height other than

those afforded by the holes in the extender stem.

5. If shaft length is properly adjusted, the search coil should be

about 12" (30cm) in front of, and slightly to the right of your

right foot (to the left of your left foot for left-handers). Your arm should be straight and relaxed,

the grip held loosely. Remember—the longer the shaft, the more you will have to bend your elbow

and the sooner your arm will get tired. Adjust coil angle (using the nylon wing nut) so that the

search coil rests ﬂat on the ground. The MD700 is balanced for comfortable searching in a tight

semicircle around the front of the operator.

6. With the shaft length properly adjusted, loosen either slip nut and

rotate the lower stem to take up the cable slack and retighten.

Attach the search coil cable to the back of the control housing.

CAUTION: Never use anything (pliers, etc.) other than your

hand to tighten the slip nut. The cable should also never be

pulled tight at the control housing or search coil.

7. With the shaft length and coil angle properly adjusted, you should

be able to move into your SEARCH position as illustrated to

the right. Lean forward very slightly and raise your arm (still

straight) until the search coil is about 2" (5cm) above the ground

and 12" (30cm) in front of your foot. The search coil should be

parallel to the ground and may have to be slightly readjusted at

this point.

INSTALLING THE BATTERIES

The battery compartments

are located on the rear of the

control housing. Press the tab

on the compartment cover down

to remove. Slide a new 9V DC

alkaline battery inside while

observing the polarity indicated

above each compartment and

replace the battery cover. Repeat

for second battery.

CONTROL PANEL

1. DISC: This control turns the

power ON and automatically

tunes the MD700 for instant

operation. All types of metal are

detected at 0-level, while most

pieces of trash are rejected at 10.

NOTE: The DISC control has

no effect when the PINPOINT

button is engaged.

2. SENS: This control is normally

set at 10. It adjusts the sensitiv-

ity to targets and ground miner-

als. The higher the setting, the

deeper it will detect. You will,

however, also pick up false

signals in highly mineralized or

STEP 4

Press tab down to gain access to

battery compartment.

Insert 9V battery observing the polarity

marked above each compartment.

TI5.08-593ENG-REV1

trashy soil. In the extreme counterclockwise position, the control doubles as a battery test. A loud

tone indicates good batteries, faint tone is week batteries, and no tone indicates the batteries need

replacing.

3. HEADPHONES: This jack accepts most stereo and mono headphones equipped with a 1/4" diameter

plug. If using a stereo headset, set the stereo/mono switch to the “stereo” position. NOTE: Unit

has a xed volume setting of LOUD. Therefore, always use headphones with individual volume

controls to compensate.

4. PINPOINT: When pushed in and held, this button switches the MD700 into the zero-motion mode

for pinpointing all metal.

DISCRIMINATION POINTS

By adjusting the DISC control, you will be able to discriminate or reject small pieces of metallic

trash and ground minerals while detecting valuable targets. The lowest setting at which an object is

rejected is referred to as the objects discrimination point. These points are determined by such factors

as size, shape, depth, type of metal and ground mineralization.

1. Scatter some targets such as coins or small pieces of foil on the ground 1-2 feet apart (30-60cm).

2. Turn the DISC control ON, set it to 0 (zero) and set the SENS control to 8.

3. Hold the search coil about 2" (5cm) above and parallel to the ground. Move it slowly over the

samples. You will hear sharp, loud responses as you pass over each one. NOTE: The MD700 is a

motion-type detector. Therefore, motion of the coil is required to get a response.

4. Increase the DISC control setting to 3 and pass over the targets again. Continue to repeat this

process for the remaining settings 4-10. You will notice that as the trash rejection level increases,

the unit will reject some targets and continue to respond to others. You have now determined the

discrimination points for the rejected objects. NOTE: The unit will remain silent when rejecting

some objects and snap, crackle and pop as others are rejected. This is a normal response indicating

that the discrimination circuitry is operating properly.

5. Large pieces of trash such as beer cans or jar lids may sound like good targets no matter what

you do. With a little practice,

however, you will be able to

discern between a large target

and a small coin-like object.

6. The illustration to the right

shows some of responses you

may expect at different levels

of discrimination. As the

DISC level increases, more

targets are progressively

eliminated, including some

good ones such as nickels

and gold rings.

SEARCH METHOD

Decide how much trash rejection you want to use. In relatively non-trashy soil, you may want to

search at DISC level 0 (the most sensitive setting to detect all metal targets within range). Once an

object is detected, increase the level for further identication. For trashy areas, search at a higher

DISC level.

1. Search slowly and systematically, sweeping

in a tight semicircle illustrated to the right.

Always overlap your sweeps at least 50%.

2. Keep the coil parallel and as close to the

ground as practical. If you're searching a lawn,

the coil can be set right on the grass.

3. Search in a methodical manner. Pay close at-

tention to where you're going and where you've

been.

ILLUSTRATION: Responses over 1" (2.5cm) deep targets with the search coil

sweeping 2"-3" (5.1-7.6cm) above the ground.

RIGHT WRONG

TI5.08-593ENG-REV1

4. Keep the search coil moving at a comfortable rate. NOTE: The MD700 is a motion-type detector.

Therefore, motion of the coil is required to get a response.

PINPOINTING TARGETS

Pinpointing takes practice! The more experience you have using the unit, the better, faster and

more accurate you will become.

1. Once a buried object is indicated with the unit by a beep response, simply place the coil lightly on

the ground away from the target area. Push and hold the PINPOINT button (at maximum sensitivity,

you may hear a faint tone that will disappear as soon as the coil is raised).

2. Raise the coil about 1/2" (1.3cm) and move it from side-to-side over the target area a few times.

Stop the search coil over the area where you received the loudest response.

3. Move the coil slowly forward and then straight back towards you a few times. Stop the coil over

the area where you received the loudest response.

4. Move the coil slowly side-to-side once more, zeroing-in on the loudest response area.

5. Stop the coil over this area and rest it on the ground.

6. Your target should be below the hot spot of the search coil, slightly below the center of the coil.

7. Slowly move the coil aside, keeping your eyes on the hot spot. Quickly mark the location with

your nger or digging tool.

8. For very strong signals, you may be able to improve your pinpointing accuracy by adding one or

more of the following steps:

a. Lift the coil until the signal is just barely heard.

b. Increase the discrimina-

tion level.

c. Rest the coil on the

ground and move it back

and forth very slowly.

9. For very weak signals, try

the following suggestions:

a. Move the coil closer to

the ground.

b. Decrease the discrimina-

tion level.

c. Speed up the sweep rate

slightly.

MINIMUM DEPTH:

• Very slow or very fast sweep speed

• Trash rejection level set at 10

• Highly mineralized soil

GOOD DEPTH:

• Moderate sweep speed

• Trash rejection level set at 5

• Moderate mineralized soil

MAXIMUM DEPTH:

• Moderate sweep speed

• Trash rejection level set at 10

• Non-mineralized soil

MISSED TARGET:

• Many targets well within the unit's

range will not be detected unless

you overlap you sweeps 50%.

MD700 LEADING PARTICULARS:

• Automatic, turn-on-and-go operation

• Silent, no-threshold operation

• VLF slow motion discrimination

• No-Motion Pinpointing

• Full-range discrimination control

• Stereo/mono headphone jack

• Patented double-derivative circuitry

• Shielded, electrostatic insulated search coil

8" (20.3cm)

• Only 3.1 lbs. (1.4kg)

• Cushioned arm rest and flexon grip

• Two 9V alkaline batteries

MD700 SPECIFICATIONS:

Frequency: VLF Search…5.5kHz; Audio Target

Response…495Hz

Operating Modes:

Search…VLF Slow Motion Discrimination;

Pinpoint…VLF All Metal No-Motion

Search Coil: Concentric, co-planar type w/100%

electrostatic insulation, submersible and

interchangeable

Batteries: two 9V alkaline w/approx. 40-50 hours

of operation (more if used w/headphones)

Length: 52" (132.1cm) extended; 46" (116.8cm)

collapsed

Weight: 3.1 lbs. (1.4kg)

MD650A OPTIONAL CARRYING CASE:

Dimensions: 48" x 11" x 5"

(121.9cm x 27.9cm x 12.7cm);

Weight: 11.5 lbs. (5.2kg)

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