Handheld Control-Wire-Line - NorthReliancenorthreliance.com/NR-12C-User-Manual-ENG.pdfHandheld Control-Wire-Line Detector 5 1. APPLICATION The NR-12C Handheld Detector (fig. 1) - here

This Manual is intended to explain design, principles of operation

and direction for using

Handheld Control-Wire-Line

For proper equipment use, study this Manual in depth.

NR-12C User Manual

Handheld Control-Wire-Line Detector

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COPYRIGHT

© 2012. STT GROUP OF COMPANIES. PRINTED IN THE RUSSIAN FEDERATION.

ALL RIGHTS RESERVED. THIS BOOKLET OR PARTS THEREOF MAY NOT BE

REPRODUCED IN ANY FORM WITHOUT THE WRITTEN PERMISSION OF THE

PUBLISHER.

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CONTENTS 1. Application…………………………………………. 5 2. Description………………………………………… 5 3. Technical specification …………………………... 7 4. Principal of operation …………………………… 8 5. NR-12C schematic diagram…………………….. 10 6. System design…………………………………….. 11 7. Marking and sealing…………………….………... 22 8. Packing 23 9. Getting started…………………………………….. 24 10. Switching on………………………………….…… 29 11. Detector operating modes………………..……… 35 12. Detector working capacity verification 44 13. Detector practical operation

Operator training 45

14. Detector safety precautions 52 15. Searching operation completion………………… 52 16. Action in emergency situation…………………… 53 17. Technical maintenance 54 18. Conservation………………………………………. 55 19. Troubleshooting…………………………………… 55 20. Shipping……………………………………………. 56 21. Storage…….………………………………………. 56 22. Warranty…………………………………………… 57 23. Certificate of Acceptance………………………… 57

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EUROPEAN UNION EC DECLARATION OF CONFORMITY.

The Handheld Control-Wire-Line Detector NR-12C is designed and manufactured in application of the following European Council directives: 2006/95/EEC relating to Low Voltage Council Directive; 2004/108/EC relating to Electromagnetic Compatibility (EMC) Council Directive. Harmonized Standards to which conformity is declared as applicable are the following: BS EN 61326-1:2006: Safety of Electrical Equipment Used for Measurement, Control and Laboratory Use. IEC 61326-1: Electrical Equipment for Measurement, Control and Laboratory Use – EMC Requirements.

NOTICE The information in this document is subject to change without notice and should not be construed as a commitment by STT GROUP of COMPANIES. STT GROUP assumes no responsibility for any errors that might appear in this document. This manual is believed to be complete and accurate at the time of publication. In no event shall STT GROUP be liable for incidental or consequential damages in connection with or arising from the use of this manual.

NR-12C User Manual


5 1. APPLICATION

The NR-12C Handheld Detector (fig. 1) - here and after referred to as ‘Detector’ - is intended for IED's (Improvised Explosive Devices) searching by means of detection their Control-Wire-Lines. NR-12C provides for an effective IED Control-Wire-Lines (C-W-L) searching and detection as well as their tracing in the terrain under control. This can be done regardless whether the C-W-L is under voltage power or not. Detector is designed for a field operation. 2. DESCRIPTION

NR-12C Detector is supplied as a complete set (see table 1 & fig.1)

Table 1

NR-12C Detector complete set

1 NR-12C Handheld Detector 1 Accessories:

2 Pelican 1750 carrying case (standard packing) 1

3 Headphones 1

4 Test unit 1

Maintenance documentation: 5 User Manual 1

- Packing diagram 1 NOTE: AA primary cells (6 pcs.) are not included in a supply set

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NR-12C Handheld Detector Complete Set

Fig.1 NR-12C Handheld Detector supply set

1 2

3

4

5

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3. TECHNICAL SPECIFICATION Table 2

Operating frequency 1.8 MHz

Depth of Control-Wire-Line detection* 30cm

Indication Audio & LED display

Power supply 6 x AA cells

Power supply voltage 6…9V

Current consumption in active mode not more 140mA

Setup time not more 5min

Searching rate 3…5 km/h

Operating conditions:

- Operating temperature -300C … +500C

- Operation limit -500C … +650C

- Relative humidity (under +250) 98 %

Weight:

Ready for operation no more 3.7g

Complete set in a carrying case (without battery)

11.6 kg

* - corresponds to the SSP-2 cable – the cable of a Russian origin specially designed for the field wire communication

Cable length - 20m Detection point - 4m from the cable‘s end

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4. PRINCIPLE OF OPERATION

The NR-12C Detector principle of operation is based on contactless harmonic excitation in -W-L and adjusted metallic housing of concealed electronics of electric currents and further detection of EM field caused by these currents. It can be described as follows (see fig. 2): Generator loop antenna (GA) radiates an alternating magnetic field H1 (part of the field that acts upon the ground is shown on the picture). When C-W-L is crossed by an alternating magnetic field, in accordance with Faraday's law an alternating electromotive force (EMF) is induced in that conductor.

Under the influence of that EMF an alternating current I is arising in C-W-L and, by-turn, produces secondary magnetic field H2 in surrounding space.

Fig. 2 NR-12C principle of operation

Control unit with display

RA GA

H2

H1

Ground level

I Line

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H2 magnetic field emitted by C-W-L has the shape of concentric circles in the plane perpendicular to the C-W-L direction with the center coinciding with the conductor C-W-L.

As the Detector is moved over the area, at some point the vertical part of H2 magnetic field emitted by C-W-L crosses the plane of the Receiver loop antenna (RA) and induces an alternating EMF inside the latter; the EMF creates a corresponding voltage at the receiver input circuit. This voltage is amplified and directed to the Electronics Unit (EU).

The Electronics Unit carries out further signal amplification and detection. Signal from the detector’s output is processed and indicated in audio (headphones) and visual form (LED diplay).

The ground itself as well has certain electro-conductive properties and produces its own EM field which influences overall sensitivity of Detector.

The C-W-L trace horizontal coordinates determination is based on NR-12C Detector capability to fix certain characteristic points of change in the intensity of the electromagnetic field generated by the object of search (target) in a surrounding area.

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5. NR-12C SCHEMATIC DIAGRAM

The NR-12C Detector consists of the following units (see fig.3): Generator unit with a loop antenna that emits a probing signal; Receiver unit with a loop antenna for the detecting Control-Wire-Line response (electromagnetic field evoked by the current induced by the probing signal is converted into the electric signal at the receiver input). Detector circuit is singling out the useful signal from the Receiver unit. Control and processing unit: - converts the detector circuit output into audio & LED indication (on the

Control panel display); - provides operational modes information and the NR-12C operational

control.

Power supply unit

Control panel with display

Receiver Detector circuit Generator

Loop antenna

Loop antenna

Control-Wire-Line

Fig. 3 Detector schematic diagram

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6. SYSTEM DESIGN

Main view of NR-12C Detector is shown on fig. 4. NR-12C Detector design consists of a triangular supporting frame formed by three telescopic bars (2 & 4). Two loop antennas (3 and 5) are fixed orthogonally on the tips of the frame. Connecting cables are pulled through A/M telescopic bars. NOTE: Do not unplug connecting cables during Detector operation

SUPPORTING FRAME consists of three jointed telescopic bars (fig. 4 & 5). Its dimensions and configuration are adjusted by corresponding level-locks (see fig. 5, point 'A'). The frame serves as supporting chassis for system components. It provides the required frame rigidity in the field operations.

1

2

3

4

6

Fig. 4 NR-12C System design

1 - Electronic unit (EU) 2 - Electronics unit support telescopic bars 3 - Generator Unit with loop antenna (GU) 4 - Horizontal telescopic bar 5 - Receiver Unit with loop antenna (RU) 6 - Telescopic bars level-locks

5

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Fig. 5 Supporting frame

A

For operator convenience Detector frame can be adjusted to the terrain condition (grass height, surface undulations and etc.)

Receiver Unit (RU) –see fig.6 - is placed in a water-proof metallic housing structurally coupled with the loop antenna. RU is mounted on a horizontal axis that allows operator to change it from transport position to operating one and vice versa. The level-lock (6) is used for fixing RU with antenna in a particular position

Transport position On-position

1

1

2

2

3 3

4

4 5

5 6

6

Fig.6 Receiver Unit with loop antenna

1. Receiver unit (RU) 2. Socket and connecting cable 3. Telescopic bar

4. Loop antenna 5. Horizontal telescopic bar 6. RU fixing level

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13 Probing signal generator (Generator Unit – GU) -see fig.7 - is placed in a water- proof metallic housing structurally coupled with the loop antenna. GU is mounted on a vertical axis that allows operator to transfer it from transport position to an operating one and vice versa. The level-lock (4) is used for fixing GU with antenna in a particular position.

Fig.7 Generator Unit with loop antenna

1. Generator unit (GU) 2. Socket and connecting cable 3. Loop antenna

4. GU fixing level 5. Horizontal telescopic bar 6. Telescopic bar

Transport and Mode III on-position Mode I & II on-position

1 1 2

6

6 3

5

5 2

4

4

3

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14 Electronic Unit (EU) (see fig. 8) is placed in a water-proof plastic housing. The control panel and data display (5) are on the upper plate of the housing. Sockets for cable connections of Receiver and Generator Units to the Electronic unit are on the lower part of the housing (3) while the Battery compartment (6) is on the back side. EU housing is equipped with an ergonomic handle to carry Detector during operations.

The Power Supply Unit represents a battery of 6 AA primary cells that are inserted into EU battery compartment (see fig.8, pos. 6). To do this release battery compartment cap, open the cover, insert cells into battery compartment referring the inscription on the EU body, close the cover and screw-up the cap.

1

4

7

2 3

1

2

3 4

5 6 7

Fig.8 Electronic Unit

1. Toggle switch 2. Headphone socket 3. Connecting cables sockets 4. EU fixing screw

5. Control panel and data display 6. Battery compartment cover with a fixing screw 7. EU handle

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Control panel and data display

Fig. 9 Control panel and data display

1. Scale I ( LEDs '1', '2'…'9') 2. Operating Mode III indicator 3. Headphones volume control indicator 4. Display brightness adjustment indicator 5. Detector sensitivity adjustment indicator 6. Adjusting parameter selection button 7. Operation mode selection

8. Scale I initial value in operating Mode III 9. Scale I initial value indication in operating Mode III 10. Detector adjustment mode indication 11. Operating Mode II indicator 12. Operating Mode I indicator 13. 'Enter' button

1 8

2

3

4

5

6

7

9

10

11

12

13

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16 Scale I Operating in Mode I & II: 1. Received signal level indication from '1' to '9' that corresponds to 'min' & 'max' reply signal value respectively (see fig. 9 & 10). Operating in Mode III: Received signal level indication with initial value in the middle of the scale (see fig.9, pos.8, LED #5) confirmed by corresponding indication (pos.9 at the fig. 9 & 11.

Detector orientation (as a guide) relatively to the expected C - W – L position: - from '4' to '1' searching item is to the left; - from '6' to '9' searching item is to the right. Operating detector in adjustment mode (' '): Adjustable parameter value indication

Fig. 10 Scale I, Mode I & II

MIN…… ….….MAX

Fig. 11 Scale I, Mode III

Left…. … …. .Right

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17 Scale 'II' (Left vertical scale at the fig. 9, pos. 3,4,5). These indicators are combined by a corresponding symbol

Scale II indication in various Detector's operational modes:

- blinks when battery voltage is lower than 6V

- blinks when battery voltage is lower than 5V

Indication that detected soil anomaly reveals features typical to metallic substance

Headphones volume control

Display brightness adjustment

Detector sensitivity adjustment

In Detector adjustment mode ( ') these symbols indicate what parameter namely is adjusted at the moment:

Fig. 12 Scale 'II' indication

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Scale 'III' (Right vertical scale at the fig. 9, pos. 10,11,12 and LED – pos. 2).

LED indication : 'I', 'II' and 'III' confirms the selected operational mode (during the Detector operational mode selection when ' indication is glowing). Various operational modes indication:

Fig. 13 Scale 'II'

' LED indication glows continuously in Detector adjustment mode as well as when Detector operational mode is selected. NOTE: ' LED indication is dead in normal operating mode

' LED indication is blinking in Detector soil compensation mode. NOTE: Hold Detector evenly for correct operation!

Operational mode 'I' confirmation

Fig. 14 a-b-c Operational mode indication

Operational mode 'II' confirmation

Operational mode 'III' confirmation

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19 Control buttons (fig. 15, see also fig. 9, pos. 6, 7 and 13)

1 - Detector operational parameters selection (Detector adjustment mode enter) - Power supply status control

2 – Detector operation mode selection - Operational parameter value alteration in detector adjustment mode.

3 - 'Enter' – selected parameter's variations fixation in a microprocessor memory ( P),

- Detector switching over to an operational mode, - Detector soil calibration activation (if necessary).

Fig. 15 Control buttons

1

2

3

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Power supply unit (see fig. 16)

Detector power supply is provided by a battery of 6 AA alkaline cells . Power supply unit consists of two cells compartments (2) concealed in a Detector handle (1). Each compartment contains 3 AA cells. Battery compartment cover is fixed by a screw (3). Cells installation diagram is on EU side wall (4)

3

1 2

4

Fig. 16 Battery compartment

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21 Accessories

Headphones (fig. 17) are intended for audio-indication. They are supplied with fabric belts to arrange them comfortably on an operator's head. Headphones output socket is on the front end of EU body. Test-unit is intended for Detector operability control, operator training and, if necessary, carrying out the required. measurements.

Fig. 17 Headphones coupling to EU

Fig. 18 Test-unit

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7. MARKING AND SEALING

The NR-12C Detector system has the following makings:

The NR-12C symbol and its works number are on the bottom plate of Electronic unit (EU) housing as well as on the sticker attached to the carrying case.

The following Detector components of are sealed:

The Electronic unit (EU) is sealed by a manufacturer's mark on the groove around one of the screw on the bottom side of EU.

If necessary, two check-lock loops (see fig. 19, item 5) can be used for possible carrying case sealing.

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8. PACKING

The NR-12C Detector and its components are stored and transported in a "Pelican1750" carrying case* (fig.19) made of rigid polypropylene c with a polymer O-ring sealing for better water-proof protection. The case is provided with: - easy open double-throw latches (4) - automatic pressure equalization valve (6) - two fold-down handles (1 & 2) - strong polyurethane rollers with stainless steel bearings (3) - polyurethane foam set for equipment protection - stainless steel hardware and padlock protectors (5)

Fig. 19 Detector in a "Pelican1750" carrying case 1. Handle 2. Side handle 3. Rollers 4. Latch 5. Eyes for key-locks and sealing 6. Pressure equalization valve

5 5 5 5

1

1 2

3

4 4

46

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9. GETTING STARTED OPERATING PRECAUTIONS

After the Detector transportation or storage under ambient temperature that differs from the operational one, it should be conditioned in the standard package under operating temperature for at least 2 hours before unpacking.

Protect the NR-12C Detector from mechanical damage. Make sure that no water or mud gets into electric connectors.

An Operator should not exceed the speed of 5 km/h while conducting a terrain search.

Be aware that the NR-12C Detector in active mode m ight represent a source of electromagnetic interference that can disturb a normal operation of various radio electronic equipment placed in a close proximity to the Detector.

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25 Detector unpacking & package content verification

- Check integrity of the carrying case sealing. - Take NR-12C Detector’s components and accessories out from the

carrying case. - Verify the completeness of NR-12C Detector according to the

notes in the logbook, packing pattern and packing record. - Check the Generator, Receiver and Electronic unit sealing integrity. - Carry out NR-12C Detector’s components visual inspection for absence

of cracks and scratches on the unit’s housings and sockets as well as the integrity of the protective cable sheathings.

NOTE: If examination has revealed defects that can't be eliminated, the faulty Detector should be returned to the warehouse with all its documentation and accompanying description of the failure in the logbook, record of the conditions under which an inspection was conducted and a date of the inspection

NR-12C User Manual


26 Preparation for operation

Open the ‘Pelican 1750’ carrying case (fig. 20)

NOTE: Make sure that power ON/OFF switch on the Electronic unit body is in an “OFF” position!

Fig. 20 Detector complete set in a carrying case

1. NR-12C Detector device 2. NR-12C Detector packing diagram 3. Test-unit 4. Hollow impression for AA cells placement 5. Headphones

1

2

3

4

5

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27 Release the battery compartment screw and open the cover (fig.21, item 2). Insert six AA cells (3) into the Detector battery compartment and close it. NOTE: Use inscription on EU side wall (1) as a reference for a correct cell installation.

Convert Detector to operating position (see fig. 22 & 23):

Loosen the Receiver unit latch (1), turn receiver loop antenna (2) into operational position (A) and tighten the latch (fig. 22)

Fig. 21 Battery installation

1 2

3

Fig. 22 Receiver unit conversion to an operational mode

1 1

A

2

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Loosen the Receiver unit latch (1), turn receiver loop antenna (2) into operational position (A) and tighten the latch (fig. 23) Loosen the supporting frame latches (see fig. 5, pos. A), adjust the required frame shape and size, tighten the latches. Use fixing screw (fig. 8, pos. 4) to adjust EU in a handy position. Couple the headphones to EU. Put on the headphones Take Detector by the handle

Detector is ready for switching on

Fig. 23 Generator unit conversion to an operational mode

1

A 2

1

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Fig. 24 Detector ready for operation

Fig. 25 Toggle key

10. SWITCHING ON

Choose a ground area that is obviously free from metallic items on its surface and possible infrastructure elements underground (fig. 24).

Use the toggle key on the Electronic Unit front panel to switch on Detector (marked by arrow at the fig.25). At that 'Soil calibration' mode is activated The following indication will be activated: ( see fig. 26 for reference) - / - indicator is blinking; - Scale I numeric gauge ‘1’…’9’ LED indicators display soil interference value (its amount decreases little by little).

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30 - The tone and volume in the headphones correspond to the LED indication - By the end of the calibration process ‘0’…’9’ LED indicators will flash and die sequentially; - / indicator is dying out; - Operational Mode I LED is shining Detector is ON and ready for operation in a SEARCH mode with automatic soil compensation.

NOTE 1: During the tuning process hold Detector motionless.

NOTE 2: If the soil-compensation-adjustment process becomes delayed more than for a minute:

- press button (previous calibration data will be erased), - hold the button till 1’…’9’ LED indicators will shine; - release the button Calibration mode will start from initial magnitude

Operational mode 'ADJUSTMENT' ( - on the device Control panel) Operational mode adjustment is intended for setting up the following parameters: - LED indication brightness - Headphones volume control - Detector sensitivity As well as for verifying power supply unit status NOTE: After Detector activation the A/M parameters are adjusted to the values that were set up during last operation session

Fig. 26 Calibration mode indication

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LED brightness adjustment

Press and release button. / , , as well as one of

1…9 LED’s will shine (see fig. 27).

Press button to adjust the required LED's brightness. NOTE: Initially the LED’s brightness is decreased and then increased. The brightness value reference number is indicated on the LED scale in the range from 1 to 9. NOTE 1: LED '1' corresponds to minimum brightness value while '9' - to maximal LED brightness. NOTE 2: Be careful, the brighter LEDs - the more power supply energy is consumed!

The selected LED brightness magnitude is confirmed by pressing button; that also activates soil-compensation adjustment and switches Detector over into an operating mode adjusted previously Audio signal volume control:

Press button twice and release it. / , , as well as one of

1…9 LED’s will shine (see fig. 28).

Press button to adjust the desired headphones signal volume level. At that a corresponding LED (one from the 1…9 scale) will confirm the adjusted volume level. NOTE 1: LED '1' corresponds to minimum audio level while '9' - to its maximal magnitude.

Fig. 27 LED brightness adjustment indication

Fig. 28 Volume control adjustment indication

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32 NOTE 2: Initially, just after keystroke the volume is logically decreased and after that increased.

The selected headphone volume level is confirmed by pressing button; that also activates soil-compensation adjustment and switches Detector over into an operating mode adjusted previously. Detector sensitivity adjustment:

Press button three times and release it.

/ , , as well as one of 1…9 LED’s will shine (see fig. 29).

Press button to adjust the desired Detector sensitivity level. NOTE: Initially the device sensitivity is increased and then decreased.

At that a corresponding LED (one from the 1…9 scale) will confirm the adjusted device sensitivity.

NOTE 1: LED '1' corresponds to minimum device sensitivity while '9' - to its maximal magnitude. The selected Detector sensitivity is confirmed by pressing button; that also activates soil-compensation adjustment and switches Detector over into an operating mode adjusted previously.

USEFUL HINT: Starting searching operation it is highly recommended to adjust the device sensitivity around '3' conventional unit (judging by the 1…9 scale )

NOTE: Meanwhile, even the device horizontal bar length (see fig. 4 & 5 for reference) has certain influence on Detector sensitivity: shot horizontal bar corresponds to a higher response level.

Fig. 29 Detector sensitivity adjustment indication

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33 Power supply status verification

Press button four times and hold it.

The following indication will be activated ( see fig. 30 & 30a for reference):

/

Release button.

The A/M indicators displays the power supply unit status (see the table).

Table 3

Residual battery voltage

>8V

Residual battery voltage

>7V

Residual battery voltage >6V

Fig. 30 Power supply unit status verification Headphones volume control

Display brightness adjustment Detector sensitivity

adjustment Fig. 30a Scale II LEDs

Fig. 31 a – b - c Power supply status indication

NR-12C User Manual


34 If the battery voltage falls to 6V and even lower: the indicator start to blink in any operational mode (see fig. 32) as well as in a 'power supply status verification' service mode. A typical tapping sound can be heard in the headphones.

NOTE: In spite of the fact that Detector is still in a working condition, replace the battery: the device sensitivity is worsening!

If the power supply voltage falls below 5 V Detector switches off automatically, indicator start to blink, and a typical audio alarm signal can be heard in the headphones(see fig. 33).

In this case promptly remove cells from power supply unit!

Fig. 32 Residual battery voltage. is lower than 6V

in operating mode 'II' and scale I indication

that corresponds to a certain soil anomaly

Fig. 33 Residual battery voltage is lower than 5V

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11. DETECTOR OPERATING MODES Operating Mode 'I' Operating Mode I represents a 'Searching mode with an automatic soil compensation' and is intended for IED Control-Wire-Lines (C-W-L) searching and detection. Mode I is activated after device switching on.

Operating Mode I activation

Convert Receiver & Generator unit to an operational mode (use fig. 22 & 23 for reference). Press button serially several times to select operating Mode I judging by the display indication (see fig. 34).

The selected operating mode is confirmed by button. That also activates soil-compensation adjustment and switches Detector over into selected operating mode.

By the end of calibration LED 'I' at the Scale III is shining (see fig. 35)

Fig. 34 Operating Mode I selection indication

Fig. 35 Detector practical operation in Mode I

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Detector operation in Mode I

The Detector operator is advancing orthogonally to the expected C-W-L path. In case of slight soil properties variations Detector carry out automatic soil compensation thereby substantially reducing the false alarm number.

NOTE: Searching for C – W – L with 3 km/h rate one has real opportunity to slip the target if it produce weak reply signal that was compensated by Detector! Use operating Mode II!

In case of abnormal signal variation (soil reaction variation exceeds certain threshold) the Mode I is blocked and Detector is switched over to operating Mode II confirmed by corresponding LED (see fig. 14b).

Scale I displays the received signal level (soil anomaly reaction) in '2…9' range. The audio signal volume in the headphones is varying according to Scale I and its tone is tuned in accordance with the loudness.

When soil anomaly reaction goes down (for instance, operator moved away from the C – W – L trace) Detector switches over to Mode I and automatic soil compensation is activated confirmed by corresponding LED (see fig. 14a). In case of strong soil properties variations (for example, soil dampness has changed and etc.) while Detector didn't switched over to operating Mode I - press button to activate device calibration

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37 Soil anomaly investigation operating in Mode I Searching with automatic soil compensation If the searching time is limited - Mark the point where a soil anomaly was detected and - Move forward, then turn to the estimated end of Line under search - Walk 2…3 m forward - Turn to estimated C – W – L trace and come forth (see fig. 36)

As far as Detector actually performs the automatic soil compensation the detailed anomaly investigation should be done referring item 'Soil anomaly investigation in operating Mode II – 'SEARCHING' (p. 39 in this Manual).

Fig. 36 Speeded up C - W – L positioning technique L - Revealed C-W-L T – Estimated revealed line tip

- Detector moving direction

Position 2

T L

Position 1 Position 3

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Detector operation in Mode II - SEARCH mode

The SEARCH mode is intended for C – W – L detection and revealed Line position accurate definition in the field. Operating Mode II activation Convert Receiver & Generator unit to an operational mode (use fig. 22 & 23 for reference). Press button serially several times to select operating Mode II judging by the display indication (see fig. 37).

The selected operating mode is confirmed by button. That also activates soil-compensation adjustment and switches Detector over into selected operating mode.

By the end of calibration LED 'II' at the Scale III is shining (see fig. 38)

NOTE: Meanwhile, LED 'I' at the Scale III can flicker (fig. 38) as well if high Detector sensitivity was set up and certain mechanical oscillation of equipment.

Fig. 37 Operating Mode II selection indication

Fig. 38 Detector practical operation in Mode II

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Detector operation in Mode II

In practice Detector operating in the Mode II displays 'what it feels ' underneath: notably, soil anomaly variation under operator's feet versus soil properties at the place where last calibration has been done. Audio signal volume in the headphones alters in proportion to Scale I indication, in so doing its tone varies in an accordance with the loudness. NOTE: Operating Mode II Operator should keep Detector at the same height above the ground surface and prevent its swinging. Operator activity in Mode II: - Holds Detector as shown at the fig. 24: - Walks orthogonally to the supposed C - W – L path - Stop moving from time to time (the moving rate depends on the soil properties variation and is defined by Operator) and press button, by the end of soil calibration proceeds with searching NOTE: Soil anomaly detection is displayed by LED & audio indication.

Soil anomaly investigation in operating Mode II – 'SEARCHING'

L

Fig. 39 C - W - L anomaly targeting L - Revealed C-W-L

A - Revealed C - W - L reply signal value - Angle between supposed C-W-L trace and Detector longitudinal axis

A

-90º 0º 90º

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40 The revealed C-W-L reply signal is crisp & reliable when the device longitudinal axis is orthogonal to C-W-L trace. NOTE 1: But the last is true when the tip of the Line is at least 4 m from Detector! NOTE 2: When the angle between C-W-L trace and Detector longitudinal axis deviates from 90 the received signal also declines, i.e. the reply goes down NOTE 3: If Detector is above the Line and its longitudinal axis is parallel to the Line the reply is 'zero' (fig.39) As a rule large-size target has no definitely designated direction (longitudinal axis position). So, no matter how Detector is oriented the reply signal will fluctuate without definite correlation and depends on anomaly features itself (see fig. 40).

Position 1 Position 5

Position 6

Position 4

Position 3

Position 2

Large-size target

Fig. 40 Large-size anomaly positioning without C - W – L

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41 Mode III - TRACING The TRACING mode is intended for revealed Control-Wire-Line path detection.

Detector conversion into TRACING operating mode

Arrange the maximum length for Detector supporting frame telescopic bars (fig.4 & 5). as well as Generator loop antenna plane along the frame's horizontal telescopic bar. To do this: release generator unit fixing level (see fig.41), swing loop antenna around the generator unit shaft and tighten its fixing level. Step aside from the C – W – L revealed. Press button serially till operating Mode III will be confirmed by a corresponding LED indication (fig. 8 pos.2).Set the selected Mode by pressing button. At that the soil calibration mode is activated and Detector is converted to the recalled operating mode. By the end of calibration action the following indication can be seen LED III & '5' at the Scale III (fig. 42)

Fig. 42 – Operating Mode III – TRACING indication

Fig. 41 – Detector conversion to TRACING mode 1.- Generator antenna loop 2.- Generator unit fixing level 3.- Generator unit shaft

2

3 1

NR-12C User Manual


42 Detector operation in Mode III

The nature of the Mode III consists in the following: - Generator antenna loop is arranged along the horizontal telescopic bar (supporting frame plane, see fig.43).

- Operator can move along the revealed C – W – L verifying its pass judging by the reply signal from Line itself. Operational Mode III practical operation: - Step 2…3 m aside the estimated C – W – L position (see fig.44, pos. 1 ). - Press button to start Detector calibration - Go back to the estimated C – W – L position but at a certain angle to the Line trace (pos. 3). Scale I left – right deviation from its central position '5' central position indicates the side where is the Line (when Generator is above the Line). At that audio signal volume in the headphones varies in proportion to Scale I deviation value.

Fig. 43 - Detector in TRACING mode

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Meanwhile, audio signal tone is rising with the deviation to one side and go down with deflection to another. - Hold the Generator antenna loop above the estimated C – W – L position and wobble the Receiver antenna loop from left to the right and back (see fig. 44, pos.3 pos.4). - In compliance with indication curve meaning mark the point below Receiver antenna loop as a 'C - W – L pass' judging by minimum Scale I LED indication and the audio signal absence in the headphones (pos. 2).

Fig. 44 Scale I indication in operating Mode III

L - Revealed C-W-L D - Distance from Receiver loop antenna to C - W - L ½ S

C - Scale I indication curve depending on Receiver-antenna-loop center position in reference to C-W-L location

S – distance between maximal indication

S

Position 1 Position 2 Position 3 Position 4

L D C

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44 - Point out the maximum reply signal value position to the left and to the right from the C-W – L position. Use test-unit as a measuring tape and determine parameter S (see fig. 44, pos. 4). NOTE: That allows operator to evaluate the C - W - L occurrence depth using the following equation: D= S/2 – h, where h is the Receiver-antenna-loop elevation above the ground - Move forward along the estimated C - W – L trace placing the Generator loop antenna above the marked point (signal minimum point, pos. 2 ) and repeat the A/M manipulations.

12. DETECTOR WORKING CAPACITY VERIFICATION

Prepare Detector for operation in the Mode I. Set the device sensitivity value equal to '3' in compliance with Scale I Place Detector on the dielectric stand (wooden table or bench) Detector Workability control in Mode I - Take the Test-unit (fig. 18). - Set its 30 cm strap and fix it - Bring test-unit to the Generator loop antenna (see fig. 46) NOTE: No reaction should be at the same time! - In 15 sec jerk away the test-unit from the Generator loop antenna - LED 'I' at the Scale I will flash and die - Shot audio signal can be heard at the same time in the headphones.

Fig. 45- Detector sensitivity control by means of Test-unit

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45 Detector Workability control in Mode II

Switch Detector over to the Mode II - Bring Test-unit to the Generator loop antenna - Scale I indication: LED 'I' (or more…) accompanied by a corresponding audio signal in the headphones.

13. DETECTOR PRACTICAL OPERATION OPERATOR TRAINING

The NR-12C Detector is operated by a single operator. From the very beginning of training an operator should wear a field uniform. It is recommended that the uniform should not have any metal elements.

Training area

Select an even area 25 x 20 m without obvious ground abnormalities and earth there certain test items: - 20 m of C -2 cable or its analog.

NOTE: -2 – represents a typical control cable used by Russian sappers in similar situation.

- Welded metallic grid (see also fig. 46 & 47). After that restore carefully grass cover (turfing) and arrange reference pegs (benchmark).

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46

Point out the Operator's pathway in the test-field during the device demonstration (see fig. 47).

NOTE: The fig.48 designations are as follows C-W-L - IED Control-Wire-Line imitation ( -2 analog cable) WG - Welded metallic grid (1000 1000 mm, with 100 100 mm cell

(4-12 mm rod) Training operation in Mode I.

Operator activity: - Prepare Detector for operation in the mode "I". - Start operation coming out to the direction "1" (see fig.48). - The anomaly searching, that is C – W – L, is carrying out judging by the audio-reply in the headphones. At that Operator should analyze the environment visually for possible evidences of embedded target.

NOTE: Prevent Detector swinging;

0m 10m 17,5m

30 5 15

Fig. 46 C – W – L imitator embedding diagram

Ground level Welded grid

-2 analog cable

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47

Fig.

47

20

x25

m tr

aini

ng te

st-fi

eld

with

mov

emen

t dia

gram

Line "3 m"

Line "4 m"

Line "5 m"

Line "9 m"

Line "15 m"

Line "16 m"

Line "17 m"

Line "18 m"

C-W

-L

WG

Searching direction # #

1 3

5 7

2 4

6 8

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48 - Walking along the route from direction "1" to "8", (following the diagram shown at fig. 48) verify every spot where C – W – L might be found judging by by Detector indication. To do that, move the device back and forth at that point. Moreover, Operator should adjust at optimum searching rate that corresponds to the real situation for positive cable detection. - Checking the anomaly at the direction #6 (see fig. 48, cable pass under the welded grid) go to the left and to the right of it verifying the fact that beneath it (that anomaly) most likely the cable is passing; - If the C – W – L wasn't found repeat the pass adjusting the right sensitivity of the device and searching rate for positive cable detection (notably at the direction #2 and #7 with low detection probability). - Start moving in the direction "4", in case of anomaly detection specify its cause especially the presence of C – W – L. - Start moving in the direction "5", in case of anomaly detection specify its cause especially the presence of C – W – L. - Start moving in the direction "8", in case of anomaly detection specify its cause especially the presence of C – W – L. NR-12C training operation in the mode "II". Operator activity: - Prepare Detector for operation in the mode "II". - Start operation coming out to the direction "1" (see fig.48). - The abnormality searching, that is C – W – L, is carrying out judging by the audio-reply in the headphones. At that Operator should analyze the environment visually for possible evidences of embedded target.

NOTE: Prevent Detector swinging;

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49 - Move along the definite route marking spots that corresponds to C – W – L detection indication.

- If the C - W – L wasn't found repeat the pass adjusting the right sensitivity of Detector and searching rate for positive cable detection.

- Start moving in the direction "4", in case of abnormality detection specify its cause (C - W – L or another reason), then move along the detected Line to the mark "3" verifying its presence and direction.

- Start moving in the direction "5", detecting an abnormality - specify its cause.

Moving back and force mark Generator antenna loop position judging by Scale I maximum value.

Define the precise C - W – L position: the C - W – L is in the middle between marker signs (see fig. 48).

- Start moving in the direction "6", detecting an abnormality - specify its cause (C - W – L or another reason).

Define the abnormality dimensions and the possibility of C - W – L pass on its background.

Specify the precise C - W – L position and direction.

Detector training operation in Mode "III". Operator activity: - Prepare Detector for operation in Mode III in accordance with User Manual. - Start operation coming out to the line "5m" (see fig. 47). - Carry out searching manipulation towards the line "18 " till the reply signal loss.

NOTE: at that generator's coil is touching (if possible) the spot marked previously.

Indication - max

Cable

Fig 48- Cable pass detection

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50 - Start operation coming out to the line "5m" (see fig. 47). - In accordance with User Manual perform standard searching manipulation towards the line #3 till the signal loss.

NOTE: at that generator's coil is touching (if possible) the spot marked previously.

- Start operation coming out to the line "5m" (see fig. 47). - Estimate the maximum signal value to the left and to the right from the possible wire-line position (see fig. 44) judging by the scale in Mode III. - Determine the spot where the C – W- -L is passing as well as its occurrence depth using test-unit (supplied) as a measuring tape.

Training with test-unit

Select an even area 5 x 58 m without obvious ground Stretch out the test-unit in the middle of the area up to 4.5 m (fig.49, see an arrow) and press it tightly to the ground. Mark the centre of the tape (2.25 m).

Operator activity:

- Prepare Detector for operation in the Mode "I". - Walk along the area and cross the test-unit in the middle of the tape. - The device indicates the anomaly detection NOTE: The test-unit can be characterized by a low probability: practically, operation at the breaking point. Boost sensitivity if necessary!

- Prepare Detector for operation in the Mode "III". - Walk to the centre of the area and operate Detector in accordance with User Manual (Operation in Mode III), hereby moving to the tip of Test-unit till reply signal loss (with positive target detection).

Fig 49 Training with test-

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51 Target search and detection

After the Operator has been sufficiently trained, it is possible to work with the NR-12C Detector while wearing a bullet-proof vest, small arms and a helmet. Prepare equipment in concordance with User Manual (Operation in Mode I)

Adjust Detector sensitivity:

- Boost sensitivity till uncomfortable value: frequent false alarm indication - Reduce sensitivity till convenient value (motion in Mode I operation): equipment 'feels' the ground if Detector is swinging or shaken (up and down).

Prepare the Detector for an operation in accordance with this Manual. Start moving in a search area orthogonally to the expected C ontrol-Wire-Line path (see fig. 50). Since the detection probability for a subsurface C-W-L rises as we go further from its end, the recommended R value (see fig. 51) should be more or equal to 4 meters for an expected line embedded up to 30 cm into the ground. In case of C-W-L detection come back verifying the maximum reply signal point. Step aside from possible C-W-L pass and carry out the Line expected trace searching. NOTE: Subsequent operator action should be done in compliance with his experience and relevant command instructions

R L

IEDThe road

under control Operator

C-W-L pass verification

Operator with Detector

C-W-L

Fig. 50 Operator movement while searching for IED C-W-L

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14. DETECTOR SAFETY PRECAUTIONS

There are no special safety precautions operating the NR-12C detector.

15. SEARCHING OPERATION COMPLETION

Make sure that the ‘ON/OFF’ switch (toggle) is in the ‘OFF’ position. Unplug the headphones and place them into the carrying case. If necessary remove moisture and dirt. Open the battery compartment, remove cells and put them into the carrying case than close the lid of the battery compartment. Convert Detector to the transport position (fig.51): - convert Generator & Receiver Units to the transport position - loosen EU fixing screw and telescopic bars level-locks - slip inwards telescopic bars - press EU to horizontal telescopic bar - fasten level-locks and tighten EU the fixing screw Put the NR-12C Detector into the carrying case.

Close the carrying case

Fig.51 Detector in transport position

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16. ACTIONS IN EMERGENCY SITUATIONS In case of certain disruptions in the NR-12C detector normal functioning that can't be eliminated by an operator the latter should stop the operation and report on the matter.

It is FORBIDDEN to operate a faulty Detector! If the NR-12C detector during certain operation had been a subject of external mechanical, electromagnetic, or climatic impact that resulted in loss of its workability - an operator should carry out an external examination of the Detector and check its working capacity in accordance with this Manual before resuming searching operations.

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17. TECHNICAL MAINTENANCE

NR-Detector maintenance during exploitation. Brief check. Brief check is conducted in order to verify the Detector technical condition before and after operation. Rough duration of the check - 2 … 5 min. Brief check priority list: Check the system fixture elements presence and state (screws, springs, axes and etc.). Check the system components cleanness. Check the carrying case soft packaging material condition. Daily maintenance service The NR-12C daily maintenance (DM) is conducted after end of searching operations regardless of how long it was used during the given day. DM rough duration is about 10 … 20 minutes. Daily maintenance priority list: Clean NR-12C system components from dust, dirt, moisture and corrosion products. Check a physical state of every fixture elements of the system (screws, axes, and springs) and tighten them if necessary. Check the integrity of the cables and sockets. Eliminate revealed faults. Maintenance service when storing equipment Technical maintenance is performed in order to check the NR-12C operating condition, to eliminate all detected faults as well as to prepare the Detector for further usage. Maintenance schedule - once a year. Maintenance average duration is from 20 to 40 minutes. Technical maintenance priority list:

- carry out the daily maintenance (DM); - verify switches and toggles for clamping accuracy; - make a record in the NR-12C Detector's form on the technical maintenance

performed.

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18. CONSERVATION There no special requirements for equipment conservation

19. TROUBLESHOOTING

The following faults can be eliminated by the User (see table 4).

Table 4

Name of the fault, its description and

evidence

Possible reason

Elimination technique

After switching on - no indication and Detector is dead

Faulty elements were installed

Replace the battery

Wrong cells polarity Check installed cells polarity

No sound in the headphones

No secure electric connection with the headphones

Check the headphones connection to a corresponding socket

Defective headphones Replace the headphones

Attention: When using the Charger and AC adapter follow general safety rules for the usage of electric appliances. If the Detector’s examination revealed faults that can't be eliminated by the User (referring Table 4) - call the product supplier for assistance. The NR-12C detector should be repaired exclusively at the manufacturer’s plant by the authorized personnel.

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20. SHIPPING The NR-12C Detector can be shipped in standard packing in a passenger cabin by any kind of transport as well as in an unpressurized fuselage cargo compartment up to 10 000 m height Prevent Detector in standard packing from shock and vibration. Using containerized shipping place equipment in standard packing in one row fixing to prevent any shift. In case of equipment transportation by an open carriage Detector standard packing should be covered by canvas cloth After Detector shipment under limiting temperature the equipment should be hold at least 8 hours under normal environment conditions. Pending practical operations the Detector should be shipped in a standard carrying case.

21. STORAGE

The NR-12C detector can be stored: - in the standard packing in a heated premise (depository) on a shelve or in a

tray under the temperature from +5º to +15ºc and a relative humidity of no more than 40% ( under +15 ºc) - up to 10 years;

- in the standard packing in non-heated premise on a shelve or in a tray under the temperature from -30º to +50ºc and relative humidity of no more than 95% (under +35 ºc) - up to 3 months;

- in the standard packing under the temperature from -40º to +60 ºc up to 1 week.

NOTE 1: The NR-12C detector must be stored in case of interruption in its operation for more than three months and over a month when is assigned for operations in a zone of particular climatic conditions. NOTE 2: When preparing the NR-12C detector for storage it is necessary to perform technical maintenance in compliance with this Manual

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22. WARRANTY

Guarantee storage period of NR-12C Detector: 24 months from the moment when the NR-12C detector was delivered to the customer. Guarantee service life of the NR-12C detector: 24 months taking into account the guarantee storage period on conditions that all requirements on device usage, storage and transportation stated in this Manual where accomplished. The manufacturer undertakes to eliminate defects or replace the NR-12C detector free of charge throughout the warranty period. Claims related to quality are not accepted and guarantee repair are not performed in the following cases: 1. Components and assemblies of the NR-12C detector are mechanically

damaged. 2. Evidence of unauthorized attempts to repair the NR-12C detector as well as

in case of broken seals. 3. The Detector works number does not correspond to that indicated in a

registration certificate (or if the works number is absent). NOTE: The NR-12C detector repair and restoration after the warrantee period is over is performed by the manufacturer under a separate agreement.

23. CERTIFICATE OF ACCEPTANCE

The NR-12C detector serial No is in conformity with the Main Technical Parameters and is accepted for use. Seller _ Date _

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FOR NOTES ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ____________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________

Documents

Handheld Control-Wire-Line - NorthReliancenorthreliance.com/NR-12C-User-Manual-ENG.pdfHandheld Control-Wire-Line Detector 5 1. APPLICATION The NR-12C Handheld Detector (fig. 1) - here