Minelab F1A4 Caractéristiques techniques

OPERATOR INSTRUCTORS

NOTES AND SYLLABUS

F1A4 Metal Mine Detector

Issue: 1

June, 2005

1 F1A4 Operator Instructor Notes and Syllabus

Minelab Countermine Division Safety through Excellence

SLIDE DESCRIPTION

INSTRUCTORS NOTES

These Instructor Notes are produced to assist instructors in preparing for the F1A4

Operator Training Course. They are provided as a guide and are not intended to be

prescriptive. They should be used in combination with the information contained in the

F1A4 Operations Manual and Field Guide.

Personnel attending the course will be required to pass an Evaluation to qualify as a

proficient operator on the equipment.

One

INTRODUCTION

The instructor will provide a short welcome and brief the students on the course. This

can include some background information on the Minelab F1A4.

Students will complete course registration administration as required.

If applicable, students will be asked to stand and introduce themselves to include a

short description of any experience in demining.

Students will be organized into pairs and issued an F1A4 per pair (or one per student if

numbers permit).

Two

COURSE OUTLINE

The Minelab

F1A4 Operator Training Course includes lectures and practical sessions.

The course is conducted over two to three days (depending on student numbers and

language translation requirements) and consists of the following lessons:

•Introduction

•LESSON 1 – Description of the F1A4

•LESSON 2 – Assembly of the F1A4

•LESSON 3 – Principle of Operation

•LESSON 4 – Operation of the F1A4

•LESSON 5 – Operator Maintenance and Care

•Operator Evaluation

2 F1A4 Operator Instructor Notes and Syllabus

Minelab Countermine Division Safety through Excellence

SLIDE DESCRIPTION

Three

LESSON 1 – DESCRIPTION OF THE F1A4

Aim. Correctly describe and identify the F1A4.

Classroom Instruction. The training aids required are:

Chalk board or white board.

F1A4 Training PowerPoint Presentation.

One F1A4 in its Compact Bag inside the Hard Case.

F1A4 detectors - one per two students.

The major teaching points of this lesson are as follows:

Safety.

Equipment specifications.

Description of all F1A4 components.

Three

TEACHING POINTS

Safety.

Emphasize the need to become very familiar with the equipment and the need to be

able to identify all parts. Relate this to safety issues during the demining process. All

components should be checked for correct operation before using the equipment. If a

fault develops, an operator must be able to correctly name the faulty part of the

detector. Explain the importance of the Test Piece.

Four

Equipment Specifications.

List the basic specifications for the F1A4. Explain that the Control Box is not

waterproof, but water resistant. All other parts of the detector are waterproof including

the Coil. Explain the need to use good quality alkaline batteries and not carbon

batteries.

Five

Description of the Compact Bag and Hard Case.

Using the Compact Bag and Hard Case cover the following points:

•Rugged zippered Compact Bag, protected when closed

•Tear resistant cordura material in Compact Bag

•Reinforcement to protect Coil when packed

•Ease of adjusting the shoulder strap

•Ability to stack transport cases

•Ability to lock latches

•Avoid sitting on transport cases

•Hard Transport Case is designed to protect the F1A4 during transit

•It is recommended to keep the F1A4 secured in the Hard Case when not in use.

3 F1A4 Operator Instructor Notes and Syllabus

Minelab Countermine Division Safety through Excellence

Six

Main Components

Using the assembled detector identify the following components. Avoid giving detailed

descriptions of the function of each component, as this will be covered in Lesson 4.

Arm Rest.

Designed to ensure a comfortable fit for the operator’s arm and adjustable when fitted to

the detector. Note the strength of the material.

Upper shaft.

Identify Upper shaft pointing out:

•Made of aluminium for ruggedness.

•Upper and Lower Camlocks (both different internal components).

•Ability to slide and lock Handle up and down.

Handle.

Designed for comfort. Note Hand Strap to add further ease of use when operating the

detector. Foam Handgrip is easily replaced and absorbs sweat in hot climates.

Includes a Camlock for locking onto the Upper shaft and is adjustable to various arm

lengths. Made of glass filled nylon and is very tough. Identify the Locking Pin for

connection of Control Box to the students.

Lower Shaft.

Explain that Lower Shaft cannot contain any metal components and is made of glass

filled nylon. Identify:

•Yoke.

•Nut,Bolt and Friction Washers.

•Cable groove to protect cable when in use.

Seven

Coil and Cable.

Referring to the slide showing a photo of a training monoloop Coil. It is important to

mention that part of the F1A4’s superior capability is due to its Coil design. Give a brief

description on the monoloop coil design explaining that no separate transmission and

reception windings exist, just one winding performing both roles. Emphasize that the

closed Coil stops vegetation from sticking up between any potential gaps and adds to

the toughness of the design. Other points:

•Waterproof design.

•Strain relief.

•Design permits edge detection (explained in Lesson 4).

•Extremely tough.

•Cable connector – explain, as with any electrical piece of equipment, the

connector is the weakest link.

4 F1A4 Operator Instructor Notes and Syllabus

Minelab Countermine Division Safety through Excellence

Eight

Skid Plate.

The Skid Plate provides protection for the Coil. It has no effect on the sensitivity of the

Coil even when wet and is easy to replace.

Earsets.

Identify where the Earsets are stowed in the Compact Bag. Demonstrate attachment to

ear. Emphasize:

•Comfort and durability.

•Ease of fit underneath helmet.

•Military connector for connection to Control Box.

•Strength of Earset cable.

•Ease of clipping earphone back into moulding if required.

•Various earsets are available:

oEarset Speaker On which (when connected) allows the F1A4’s Loudspeaker

to continue to operate (for humanitarian demining).

oEarset Speaker Off, identifiable by a short length of green heatshrink on the

cable, shuts the detector Loudspeaker off when connected.

oBoth Earset above are also available with an in-built volume control.

Batteries.

The F1A4 comes with four ‘D’ cell batteries as standard, either Alkaline or

Rechargeable.

Test Piece.

The Test Piece is used to simulate the sound of a Type 72A minimum metal mine

buried to a depth of 15 cm. The Test Piece is a vital piece of equipment to ascertain

whether the F1A4 is working to its optimum performance. Make sure the Test Piece is

carried by each deminer on their person.

Nine

Control Box.

Key points:

•Houses all electronics, batteries and controls.

•Is IP65 water-resistant.

•Includes Battery Lid and Battery Carrier.

•Identify all buttons, switches and ID Plate.

•Identify Battery Lid locking pins.

•Identify RS232 port.

•Internal Loudspeaker.

•Should always be handled with care.

5 F1A4 Operator Instructor Notes and Syllabus

Minelab Countermine Division Safety through Excellence

Ten

Stowing the detector.

Use the packed Compact (carry) Bag to indicate the locations of the stowed F1A4

components. Mention the following:

•Check for damage/cleanliness.

•Have students be able to name each item.

•Stow away correctly.

Other Components.

•Operations Manual – waterproof paper.

•Field guide – abbreviated and pictorial instructions, waterproof.

•Control Box Bag – shoulder straps and belt clips.

Eleven

QUESTIONS

Students shall be able to correctly identify all components of the F1A4.

6 F1A4 Operator Instructor Notes and Syllabus

Minelab Countermine Division Safety through Excellence

SLIDE DESCRIPTION

Twelve

LESSON 2 – ASSEMBLY OF THE F1A4

Aim. Correctly assemble and disassemble the F1A4.

Classroom instruction. The training aids required are:

Chalk or white board.

F1A4 Training PowerPoint Presentation.

F1A4 detectors - one per pair of students (minimum).

One set (four size “D” cells) of fresh batteries per F1A4.

The major teaching points of this lesson are as follows:

Review.

Assembly and disassembly of the F1A4.

TEACHING POINTS

Review. Review the description and identification of components of the F1A4.

Thirteen

Shaft Assembly.

Using a packed F1A4 demonstrate the Shaft assembly procedure in the following

manner:

•Secure the Handle. As you take the F1A4 out of the Compact Bag secure the

Handle in one place by locking the Handle Camlock. This will prevent it from

sliding up and down the Upper shaft while you are presenting.

•Orient Shafts. Ensure that the cable is completely embedded in the Lower Shaft

cable guide (demonstrate this by using all four fingers of your right hand feeling

the cable as they run up the length of the Lower Shaft) and that excess cable is

not protruding between the Lower and Upper shafts. Place the Coil on the

ground and gently hold in position using a foot. When orienting the shafts

ensure the Coil is facing forward on the Lower Shaft and the Handle is facing

forward on the Upper shaft.

•Unlock Lower Camlock.

•Prior to connecting the shafts once again ensure that the Cable is securely in the

guide.

•Connect Shafts.

•Lock Lower Camlock.

7 F1A4 Operator Instructor Notes and Syllabus

Minelab Countermine Division Safety through Excellence

Fourteen

Fifteen

•

••

•Secure Grommet. Show both Grommets and explain the reason for their

existence (reduces stress on cable) and ability to shaft or hip mount the Control

Box. Stress the importance of the selected Grommet being properly locked into

the Keyway opening located at the top of the Upper shaft.

•Unlock Upper Camlock.

•Insert Armrest. Explain the correct orientation needed to ensure the cable does

not interfere with the insertion of the Armrest. Demonstrate how the Armrest can

be adjusted.

•Lock Upper Camlock. Conduct final check to ensure Grommet is correctly

located.

Present to the students the difference in ‘hip mounting’ the Control Box by using the

Lower Grommet on the Coil cable. Follow the same procedure for ‘shaft mounting’ the

Control Box as discussed above.

Sixteen

Battery Installation.

Using the 4 ‘D’ Cell Batteries demonstrate the correct procedure for inserting batteries.

Note the following:

•Control Box should be placed in the Compact bag when fitting/removing

batteries (stops dirt and debris from getting on Control Box).

•The batteries should be inserted from the centre outwards in accordance with

the Battery Map.

•The batteries should be gently placed inside the Battery Carrier and not forced.

•The negative end (flat end) of the battery should be inserted first.

•There is no need to remove the Battery Carrier from the Control Box when

inserting batteries.

•Demonstrate the ease with which to lock the Battery Lid Clips into place (they

should not be forced).

Seventeen

Connection of the Control Box to the Upper shaft.

Demonstrate the correct attachment of the Control Box to the Upper shaft ensuring that

the Locking Pin is turned all the way to the stop.

Eighteen

Connection of the Coil Cable and Earset to Control Box.

Connect the Cable Connector and Earset to the Control Box ensuring:

•Both connectors ‘click’ into the locked position.

•Ensure both Cable Connectors are held by their base when connecting and

disconnecting.

Once assembled, adjustments can be made to the handle to ensure the weight of

the detector is balanced evenly as the detector is swept from side to side.

8 F1A4 Operator Instructor Notes and Syllabus

Minelab Countermine Division Safety through Excellence

Nineteen

Disassembly.

Reverse the procedure to demonstrate disassembly. While disassembling place each

component back into the Compact Bag paying particular attention to the:

•Correct location of each component as shown on the reverse side of the field

guide.

•Yellow alignment line in the base of the Compact Bag to illustrate the correct

orientation of the handle.

•Correct folding of the Upper and Lower Shaft to fit properly into the Compact Bag

(this may take several demonstrations) – Upper and Lower Shaft Camlocks are

to be locked but the Handle Camlock unlocked.

•Need to remove the batteries from the Control Box.

•Replacement of Dust Caps as required.

•Test Piece being correctly stowed into the Control Box Bag.

Have the students take turns assembling and disassembling and watch for incorrect

procedures. Alternatively, select one student to assemble the detector with the rest of

the class reporting faults as they occur. The same method can be used for

disassembly.

Twenty

QUESTIONS

Students shall be able to correctly assemble and disassemble the detector with no

faults.

Faults to check for include:

•Incorrect alignment of Shafts.

•Failure to unlock a Camlock when trying to insert or remove the Shaft or

Armrest.

•Incorrect positioning of Grommet.

•Incorrect method of inserting batteries into the Battery Carrier.

•Failure to turn the Handle Locking Pin to the locked position.

•Failure to “click” Coil Connector into the locked position.

•Incorrect folding of Shafts before placement inside the Compact Bag.

•Failure to place the Test Piece back into the Control Box Bag.

9 F1A4 Operator Instructor Notes and Syllabus

Minelab Countermine Division Safety through Excellence

SLIDE DESCRIPTION

Twenty one

LESSON 3 – PRINCIPLE OF OPERATION

Aim. To understand the principle of metal detection and how Multi-Period Sensing

(MPS) eliminates false alarms generated from mineralized ground.

Classroom instruction. The instructor must decide whether the content of this lesson is

applicable for the student group. The training aids required are:

Chalk board or white board.

F1A4 detectors - one per pair of students (minimum).

One set (four “D” cells) of fresh batteries.

Two different types of mineralized rock (laterite if available).

F1A4 Training PowerPoint Presentation.

The major teaching points of this lesson are as follows:

Revision.

Principle of Operation.

Multi Period Sensing.

Demonstration of Ground Balancing.

TEACHING POINTS

Revision. Nominate selected students to assemble and disassemble the F1A4 in front

of the class.

Twenty two

Twenty three

Principle of Operation.

Using the slides, explain the principle of metal detection. Emphasize:

•All detectors use the same magnetic principle to detect metal.

•The smaller the target the more difficult to obtain a response.

•Where the ground is mineralized, the false alarm can hide a minimum metal

mine.

•Conventional detectors must reduce sensitivity to combat the effects of ground.

•Reducing the sensitivity of a detector increases the risk of not detecting a

minimum metal mine.

•The F1A4 has no sensitivity adjustment as it can maintain maximum sensitivity

even when working in heavily mineralized soil.

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