background image

 

 

Page

 

5

 

 

 

 

HEADSET

 

 

The

 

NJD

5

 

has

 

one

 

headset

 

jack

 

on

 

the

 

electronics

 

package.

 

The

 

jack

 

is

 

a

 

1/4"

 

mono

 

jack.

 

 

HANDLE

 

AND

 

POKE

 

STICK

 

 

The

 

antenna

 

is

 

mounted

 

to

 

a

 

telescoping

 

handle.

   

The

 

handle

 

is

 

adjustable

 

in

 

length

 

from

 

19"

 

to

 

57".

   

Cables

 

are

 

attached

 

to

 

the

 

handle

 

by

 

means

 

of

 

Velcro

 

straps.

   

The

 

antenna

 

swivel

 

couples

 

to

 

the

 

handle

 

in

 

a

 

twist

 

lock

 

method.

 

 

The

 

poke

 

stick

 

is

 

a

 

telescoping

 

rod

 

that

 

is

 

used

 

to

 

tap

 

on

 

surfaces

 

to

 

try

 

to

 

dislodge

 

corroded

 

metallic

 

junctions.

  

 
 

CARRYING

 

THE

 

NJD

 

 

The

 

NJD

5

 

is

 

supplied

 

with

 

a

 

backpack

 

style

 

carrying

 

harness.

  

Use

 

of

 

a

 

single

 

shoulder

 

strap

 

is

 

not

 

recommended

 

because

 

it

 

leads

 

to

 

rapid

 

operator

 

fatigue

 

and

 

discomfort.

   

The

 

backpack

 

harness

 

allows

 

the

 

NJD

5

 

to

 

be

 

carried

 

on

 

the

 

lower

 

back

 

where

 

controls

 

are

 

accessible

 

and

 

weight

 

is

 

evenly

 

distributed

 

across

 

the

 

shoulders.

 

 
 

BATTERY

 

CHARGER

 

 

The

 

NJD

5

 

is

 

supplied

 

with

 

a

 

plug

in

 

battery

 

charger/external

 

power

 

supply.

  

The

 

supply

 

can

 

operate

 

the

 

NJD

5

 

while

 

charging

 

its

 

battery.

  

The

 

supply

 

operates

 

over

 

a

 

range

 

of

 

100

240

 

Volts

 

AC,

 

50

 

or

 

60

 

Hertz

 

and

 

requires

 

no

 

switch

 

selection

 

by

 

the

 

user

 

for

 

primary

 

AC

 

voltage.

 

 

The

 

NJD

5

 

is

 

designed

 

to

 

operate

 

from

 

its

 

battery.

  

Continued

 

operation

 

using

 

the

 

AC

 

power

 

supply/battery

 

charger

 

may

 

overcharge

 

the

 

battery

 

and

 

shorten

 

its

 

useful

 

life.

   

Do

 

not

 

charge

 

the

 

NJD

5

 

for

 

more

 

than

 

8

 

hours

 

when

 

fully

 

discharged.

   

 
 

Summary of Contents for BOOMERANG NJD-5

Page 1: ...TS COPYRIGHT 2007 INFORMATION SECURITY ASSOCIATES Rev January 8 2008 Information Security Associates LLC BOOMERANG NON LINEAR JUNCTION DETECTOR MODEL NJD 5 OPERATOR S MANUAL ISA Information Security A...

Page 2: ...tup 6 Section 4 Operation 9 Important Notes On Full Scale Readings 10 Use of Attenuator 11 Section 5 Operational Notes and Hints 12 Phantom Returns and Interfering Signals 12 Resolving Indications of...

Page 3: ...ped in avalanches and more commonly are seen in electronic article surveillance systems to deter shoplifting Detectors of this sort consist of a transmitter and a receiver that is tuned for instance t...

Page 4: ...r metallic oxides These metallic oxides commonly occur in building and furniture construction and are found in furniture and other office type products like three ring binders and paper clips In this...

Page 5: ...0 or 2745 MHz The switch marked Normal 2nd Only is used to turn off the 3rd harmonic receiver This is useful when a return needs to be evaluated in depth The audio section of the NJD 5 switches betwee...

Page 6: ...ead of the bracket on the antenna has two slots machined into it to be used to lock the antenna in certain orientations CABLES The NJD 5 electronics package contains a transmitter and receiver These a...

Page 7: ...strap is not recommended because it leads to rapid operator fatigue and discomfort The backpack harness allows the NJD 5 to be carried on the lower back where controls are accessible and weight is ev...

Page 8: ...be loosened 4 Connect a set of coaxial cables to the antenna The coaxial cable assembly is built with male and female connectors to prevent incorrect connection of antenna elements 5 Connect the mete...

Page 9: ...come on Turn the knob slightly back clockwise until the tone stops Set the Attenuator to the 9 dB setting 12 Remove the test target from its envelope Hold it between thumb and forefinger in front of t...

Page 10: ...he short side of the antenna Try different orientations of the antenna and the target to get the strongest return signal 17 Attach the backpack style carrying strap Clip the short ends of the strap to...

Page 11: ...le before the 3rd harmonic meter displays any return at all 4 If the non linear junction you have detected is a metal to metal contact such as a sheetrock screw in a steel stud or two dissimilar metal...

Page 12: ...This indicates a corroded junction because of the high level of 3rd harmonic IMPORTANT NOTE ON FULL SCALE READINGS If both 2nd and 3rd harmonic displays are full scale when looking at a target the ope...

Page 13: ...ble electronic devices They may be detected in many directions from some distance away When this is the case it may be difficult to determine what exactly the NJD 5 is detecting The solution to this d...

Page 14: ...ng detected by the NJD 5 which appears to come from all directions and changing the direction the antenna is pointing in does not eliminate the signal This is caused by a signal from another transmitt...

Page 15: ...ng room If it is suspected that a legitimate electronic device is the cause of the return move the device and use the NJD 5 to look from the adjoining area back into the room under investigation at th...

Page 16: ...fices this molding is a rubber or plastic strip that can be removed and re installed If the wall has a papered surface make a slit in the paper and peel it back enough to create a small opening into t...

Page 17: ...when the battery reaches a certain level of charge This avoids the gradual deterioration of detection ability that occurs when the battery reaches a critical level of discharge 4 Take care when connec...

Page 18: ...full charge will be made in 6 hours Charging for more than 8 hours can overcharge the battery and shorten its useful life The BOOMERANG is designed to use its battery as the primary power source The...

Page 19: ...nt 1 41079 Target 4 41069 Velcro Strips 1 41055 Manual 1 41075 Small Accessories Pouch 1 41080 Mono Headset w 1 4 Plug 1 41085 Poke Stick 1 41166 3 foot AC Cord 1 41164 Switching DC Power Supply Charg...

Page 20: ...examination by Information Security Associates LLC shall be found to have been originally defective INFORMATION SECURITY ASSOCIATES LLC SHALL NOT BE LIABLE FOR LOSS OR DAMAGE CAUSED EITHER DIRECTL Y O...

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