Minelab F3 Manual de usuario

FIELD SERVICE MANUAL

Issue 1.4 4th February, 2005

Part No: 4904-0003

F3 Metal Mine Detector

LEVEL 1 MAINTENANCE

F3 Field Service Manual – Level 1 Maintenance

Page 2

WARNING

THIS DOCUMENT CONTAINS MINELAB ELECTRONICS

LIMITED RIGHTS TECHNICAL DATA OR RESTRICTED

RIGHTS DATA OR BOTH.

Minelab Electronics

This work is copyright. Apart from any use as

permitted under the Copyright Act 1968, no part

may be reproduced by any process without written

permission from

Minelab Electronics

118 Hayward Avenue, Torrensville

South Australia.5031

CONTENTS

SECTION PAGE

Introduction .....................................................................................................................4

1.1.

Levels Of Maintenance .............................................................................................4

1.2.

How To Use This Manual .........................................................................................4

Level 1 Maintenance

Mechanical And Functional Testing Of The F3................................................................6

2.1.

Mechanical Testing...................................................................................................6

2.2.

Functional Testing ....................................................................................................7

Disassembly And Reassembly Procedures ...................................................................12

3.1.

Speaker Pod...........................................................................................................12

3.2.

Handle....................................................................................................................15

3.3.

Armrest...................................................................................................................18

3.4.

Electronics Pack.....................................................................................................21

3.5.

Coil .........................................................................................................................29

3.6.

Shafts .....................................................................................................................34

3.7.

Battery Pack ...........................................................................................................44

Faultfinding Procedures ................................................................................................51

4.1.

Switch On Test Faultfinding....................................................................................51

4.2.

Noise Cancel Faultfinding.......................................................................................51

4.3.

Audio Reset Faultfinding.........................................................................................51

4.4.

Ground Balance Faultfinding ..................................................................................51

4.5.

Test Piece Faultfinding ...........................................................................................51

4.6.

Alarm Tone Faultfinding .........................................................................................52

4.7.

Earset Faultfinding..................................................................................................52

F3 Field Service Manual – Level 1 Maintenance

Page 4

1. INTRODUCTION

This manual is intended to instruct service technicians in functional

verification and Level 1 maintenance of the F3 mine detector. All sub-assemblies of

the F3 can be replaced without the need for adjustment or calibration. This service

manual includes all Level 1 maintenance procedures, including functional testing and

troubleshooting.

1.1. LEVELS OF MAINTENANCE

Levels of maintenance for the F3 comprise:

Level 1:

Level 1 maintenance includes replacement of all major components

and most minor components of the F3 detector. This level of maintenance can be

conducted at demining field sites or local depots if required. Level 1 maintenance

includes full functional testing of the detector and does not require any specialized

facilities but does require the F3 Service Tool Kit.

Level 2: Level 2 maintenance encompasses Level 1 maintenance plus repairs

to the earset earphone and coil socket replacement. This level of maintenance

requires electronic workshop facilities and the F3 Service Tool Kit.

Level 3: Level 3 maintenance encompasses Level 1 and Level 2 maintenance,

plus electronics pack PCB repair. Level 3 repairs are only conducted at Minelab’s

repair workshops located in Australia, Ireland and the USA.

1.2. HOW TO USE THIS MANUAL

If doubt exists as to the mechanical integrity or performance of the F3, turn to

Section 2 for comprehensive mechanical and functional testing of the F3. If any

mechanical component (eg armrest, coil) of the F3 requires replacement, Section 3

details Disassembly and Reassembly Procedures. If any faults are found during

functional testing, references to faultfinding procedures in Section 4 are included.

F3 Field Service Manual – Level 1 Maintenance

Page 5

LEVEL 1 MAINTENANCE

F3 Field Service Manual – Level 1 Maintenance

Page 6

2. MECHANICAL AND FUNCTIONAL TESTING OF THE F3

This section details mechanical and functional testing of the F3. Section 2.1

lists all mechanical testing and directs the user to applicable Level 1 repair

procedures if any defects are found. Section 2.2 lists functional testing of the F3

and will refer the user to the applicable faultfinding procedure if a fault is found. A

defective component is confirmed using the substitution method, so a complete and

fully serviceable F3 should be on hand (or a range of serviceable spare parts). After

any repair to the F3, Section 2.2 Functional Testing must be repeated in full to

ensure the F3 is fully serviceable before being returned to operational use.

2.1. MECHANICAL TESTING

Confirm that all components are present in the hard case. Unpack and fully

assemble the F3 (as described in Section 2.3 of the F3 Operations Manual). Fit

known good batteries, and fully extend the shafts. During assembly:

• Ensure that the Sensitivity Endcap is correctly positioned and in good

condition. (Replace Endcap in accordance with Section 2.5 of the F3

Operations Manual.)

• Ensure that the Battery Pack lid O-ring is present, clean and in good

condition. Ensure that the tether attaching the BP lid to the BP is present

and in good condition.

• Ensure that the coil can be tilted smoothly and holds its position without

drooping. Ensure that it rotates smoothly to its three positions.

• Ensure that the skid plate is firmly attached and in good condition.

• Ensure that the shafts extend smoothly to their full extension and that the

camlocks hold the coil and shafts in position.

• Ensure that the earset dustcaps (on detector earset socket and earset) are in

good condition. Do not plug the earset in at this stage.

• Unlock the armrest camlock and ensure that the armrest slides smoothly from

the handle to the endcap. Ensure that the armstrap is in good condition.

Mechanical testing is now complete. To replace any worn or damaged parts

found during the above procedures, refer to the Section 3 disassembly and

reassembly procedures and follow these procedures to the point where the faulty

part can be replaced.

F3 Field Service Manual – Level 1 Maintenance

Page 7

2.2. FUNCTIONAL TESTING

This section details functional testing of the F3. It should be used to confirm

serviceability of an F3 before it is returned to the field for use and whenever doubt

exists about the serviceability of an F3. The F3 must pass all these tests to be

considered serviceable. References to faultfinding procedures in Section 4 are

included for repair as required. If a repair is completed, the full functional test

should be repeated from Section 2.2.1.

Note: A Ground Balance (GB) Test Piece is required to properly test the F3. This

is needed to simulate mineralised or “noisy” ground and ensure correct F3

Ground Balance operation. The GB Test Piece can be a local piece of

mineralised ground (hot rock or a fired tile) that produces a response from the

F3.

2.2.1. Switch On Test

• Hold the coil at least 600mm (24ins) from the ground and away from any

metallic objects and switch on the F3.

• Ensure that four or five rising tones taking 12 to 15 seconds are heard. A

steady threshold tone should be heard a few seconds after the rising tones

finish.

Figure 1 Switch On Procedure

• If the correct tones are not heard, check that good batteries are being used

and that the batteries are fitted correctly.

• If the correct tones are still not heard go to Section 4.1 for faultfinding

procedures.

2.2.2. Noise Cancel Test

• Hold the coil stationary and at least 600mm (24ins) above the ground. Press

and immediately release the Noise Cancel button (black button located

behind the handle).

Note: The coil should not be moved during this procedure nor should metallic

objects be brought near the coil during this procedure.

Figure 2 Noise Cancel Procedure

F3 Field Service Manual – Level 1 Maintenance

Page 8

• Noise Cancel will commence with two single beeps followed by 45 seconds of

sharp double beeps finishing with four single beeps.

• During the 45 seconds, the detector scans the environment searching for the

source of any electrical interference. Once detected, the F3 will automatically

select a different operating frequency to eliminate or reduce the interference.

• If the correct sequence of Noise Cancel beeps is not heard, go to Section 4.2

for faultfinding procedures.

2.2.3. Audio Reset Test

• Hold the coil at least 600mm (24ins) off the ground and away from any

metallic objects.

Note: If the threshold seems to be at the correct volume, position the coil near a

piece of metal to conduct this procedure (If the coil is brought near a piece of

metal and the Audio reset Procedure is successfully completed, when the coil

is moved away from the piece of metal, another Audio Reset procedure will

need to be completed).

• Press and immediately release the Ground Balance button (Green Button

located on top of the Handle (if the button is held too long, the detector will

begin to Ground Balance).

Figure 3 Audio Reset Procedure

• Within two seconds the threshold tone will return to its correct level.

• If the threshold tone does not return to the correct level, go to Section 4.3 for

faultfinding procedures.

2.2.4. Ground Balance Test

Note: Ensure the operator’s hands and arms are free of metallic objects (watches,

rings etc), and that no other metallic objects are near the coil.

a. If a Ground Balance Test Piece is being used:

• Hold the ground balance button down for 3-4 seconds; this will reset the

detector internal ground balance setting.

• Ensure that the coil is held stationary and away from any metal during this

procedure.

• Move the Ground Balance Test Piece from approximately 150mm (6ins)

above the centre of the coil slowly towards the centre of the coil, a response

should be heard.

• Press down and hold the green Ground Balance button whilst moving the

Ground Balance Test Piece from approximately 150mm (6ins) above the

centre of the coil slowly towards the centre of the coil (and touching the coil),

then out again approximately 150mm (6ins). Continue to move the Ground

Balance Test Piece slowly to and from the coil until the ‘Ground Balance OK’

tone is heard. (‘Ground Balance OK’ tone consists of a short high-pitched

double beep).

• Release the Ground Balance button.

F3 Field Service Manual – Level 1 Maintenance

Page 9

• Move the Ground Balance Test Piece from approximately 150mm (6ins)

above the centre of the coil slowly towards the centre of the coil, no response

should be heard.

• If a response is still heard, repeat this procedure, if there is still a response,

go to Section 4.4 for faultfinding procedures.

b. If local ground is being used:

• Ensure that this procedure is carried out on ground free of metal and hold the

coil about 150mm (6 ins) above the ground.

• Press and hold the ground balance button down for 3-4 seconds, this will

reset the detector internal ground balance setting.

• Slowly lower and raise the coil to the ground (touching the ground), a ground

response should be heard. If a response cannot be heard from the ground,

find an area of ground that produces a response when repeating the previous

step. If no ground can be found that produces a response from the detector,

a Ground Balance Test Piece must be used (Section 2.2.4.a).

• Press down and hold the green Ground Balance button

and slowly lower the coil directly to the ground (touching the ground) then lift

the coil up again 150mm (6ins).

• Continue to lower and raise the coil until the ‘Ground Balance OK’ tone is

heard. (‘Ground Balance OK’ tone consists of a short high-pitched double

beep).

Note: Movement of the coil during the entire Ground Balance procedure should be

slow, continuous and smooth and each down and up movement should take 3

to 4 seconds.

• Release the Ground Balance button.

Figure 4 Ground Balance Procedure

• Raise and lower the coil from the ground, no response from the ground

should be heard.

• If the Ground Balance OK tone is not heard within 20 seconds of starting the

procedure, release the Ground Balance button and repeat this procedure.

• If there is metal in the ground under the coil whilst Ground Balancing, the

detector will not ground balance correctly. Move the detector and repeat the

Ground Balance over ground that is free of any metallic objects.

• If a response is still heard, repeat this procedure, if there is still a response

after repeating this procedure, go to Section 4.4 for faultfinding procedures.

F3 Field Service Manual – Level 1 Maintenance

Page 10

2.2.5. Test Piece Test

Note: Ensure the operator’s hands and arms are free of metallic objects (watches,

rings etc), and that no other metallic objects are near the coil. Maximum sensitivity

is only available 30 seconds after the threshold tone is heard. Do not test the

detector with the Test Piece until 30 seconds after the threshold tone is heard.

a. Black Endcap.

• Hold the Test Piece above the middle of the coil with the rounded end

(containing metallic target) away from the coil.

• Move the Test Piece towards the centre of the coil until it lightly touches the

coil then move it sideways off the coil (the Test Piece should be moved slowly

and smoothly during this procedure). A faint but clear response (change in

threshold tone volume and pitch) should be heard indicating that the

sensitivity of the detector is correct.

Figure 5 Test Piece Procedure

• If the correct response is not heard, go to Section 4.5 for faultfinding

procedures.

• Turn the detector off.

b. Red Endcap.

• Remove the black endcap and fit the red endcap.

• Turn the detector on, wait for the start up procedure to finish.

• Hold the Test Piece above the middle of the coil with the rounded end

(containing the metallic target) towards the coil.

• Move the Test Piece towards the centre of the coil until it lightly touches the

coil then move it sideways off the coil (the Test Piece should be moved slowly

and smoothly during this procedure). A clear response (change in threshold

tone volume and pitch) should be heard indicating that the sensitivity of the

detector is correct.

• If the correct response is not heard, go to Section 4.5 for faultfinding

procedures.

2.2.6. Alarm Tone Test

• Remove the red endcap (with the detector switched on). A continuous

cycling alarm tone should now be heard.

• If the alarm tone is not heard go to Section 4.6 for faultfinding procedures.

• Turn the detector off.

• Remove the red endcap and fit the black endcap.

• Turn the detector on and repeat the black endcap Test Piece procedure

(Section 2.2.5).

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