Blisstool LTC42 User manual

BLISSTOOL
BLISSTOOL
LTC42
User Guide
version EN200809220112
2007 - 2008 © BLISSTOOL

CONTENTS
1. Introdu tion.......................................................................................3
2. Features..............................................................................................3
3. Te hnologies ......................................................................................3
4. Standard kit........................................................................................4
5. A essories.........................................................................................4
6. Devi e onstru tion...........................................................................4
7. Devi e assembling and disassembling...............................................6
8. Control, adjustment and indi ation applian es.............................7
9. Devi e adjustment and preparation for work.................................8
10. Sear h method..................................................................................9
11. Battery harging...........................................................................10
12. Pra ti al re ommendations..........................................................11
13. Te hni al maintenan e and servi e support during guarantee 12
14. Legislation......................................................................................12
15. Conta t information......................................................................12
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1. Introdu tion
BLISSTOOL LTC42 is a contemporary professional metal detector, designed to be used on any
type of terrains. It features perfect depth and discrimination and is outstanding for its high
uality, easy user’s adjustment and minimal maintenance need. That makes it appropriate for
both the experienced seekers and the beginners in the field.
It is e uipped with a recharging 12V/2.5Ah NiMH battery, ensuring up to 48 hours continuous
work with a single charge. Both the solid light aluminum detachable carrier construction and
the watertight 28-cm Double D search coil add to the device’s mobility.
BLISSTOOL LTC42 features an adjustable audio threshold, automatic ground balance and
improved discrimination that ensures:
- Adjustable NOTCH Filter, used to determine the detection/rejection level of contemporary
non-ferrous pollutants (aluminum, bottle/jar covers, foil, silver-paper);
- Adjustable Discriminator, used to determine the detection/rejection level of ferrous metals
(iron objects, heavily corroded iron).
2. Features
–VLF-IB technology with 8KHz working fre uency
–System for eliminating the ground interference
–Resistance in areas with heavy mineralized ground
–Discrimination by the movement of the search coil
–28 cm Double D search coil, BLISSTOOL DD28SC1 type
–Adjustable iron objects rejection level
–Adjustable contemporary pollutants rejection level
–Adjustable audio threshold
–Adjustable audio volume control
–Stereo headphones outlet
–12V/2.5Ah built-in recharging battery
–Single charge operating time: up to 48 working hours
–Low battery indicator
–Consumption: min:35mA, max:100mA
–Automatic battery charger BLISSTOOL DA12250
–Detachable and adjustable carrier construction
–Weight in assembled mode (ready for work): 2 kg
–A 3-year guarantee
3. Te hnologies
–adjustable audio threshold for fine adjustment of the device’s sensitivity;
–adjustable discriminator, used to determine the detection/rejection level of ferrous metals
(iron objects, heavily corroded iron);
–adjustable NOTCH Filter, used to determine the detection/rejection level of contemporary
non-ferrous pollutants (aluminum, bottle/jar covers, foil, silver-paper);
–automatic ground balance, used to eliminate the ground interference, coming from the
soil alloys and pollutants;
–automatic compensator, used to eliminate the influence of the environmental
BLISSTOOL LTC42 – User Guide (version EN200809220112) Page 3 of 12

temperature alterations.
4. Standard kit
1. Metal detector BLISSTOOL LTC42 with 28 cm Double D search coil BLISSTOOL DD28SC1
and 12V/2.5Ah built-in recharging battery
2. Automatic battery charger BLISSTOOL DA12250
3. User guide
4. Transport and storage box
5. A 3-year guarantee
5. A essories
1. Transport and storage rucksack
2. Stereo headphones
6. Devi e onstru tion
BLISSTOOL LTC42 consists of the following basic elements:
1. Carrier rod
2. Fixating ring
3. Electronic control module with control and indication appliances
4. Handle
5. Armrest
6. Power supply module
7. Intermediate connecting rod
8. Metal bolt and nut
9. Lower connecting rod
10. Plastic bolt and nut
11. Search coil
Fig.1 / Metal detector BLISSTOOL LTC42 – construction
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For easy assembling and disassembling of the device, in the standard kit:
–the carrier rod, the fixating ring,
the electronic control module, the
handle, the armrest and the
power supply module are
combined in a single non-
assembling component;
–the metal bolt and nut are
mounted on the intermediate
connecting rod;
–the lower connecting rod and the
search coil are assembled together
with the plastic bolt and nut.
Fig.2 / Metal detector BLISSTOOL LTC42 – components
The search coil could be repeatedly mounted and dismounted from the lower connecting
rod via the plastic bolt and nut. It is highly recommended that they should not be tightly
fastened, to ensure that first - the thread could not be damaged and second - the search
coil position could be easily changed during the search or when folded for carrying and
transporting.
The carrier rod is made from aluminum pipe. The fixating ring that is mounted on its lower end
is used for connecting the pipe with the intermediate connecting rod.
The electronic control module consists of a plastic box with room for the metal detector’s
electronics. The control and indication appliances lie on the front and the back panel of the
box.
The handle is part of the carrier rod and is coated with soft and solid foam.
For better stability, the armrest is made from aluminum.
The power supply module consists of a plastic box with room for the recharging 12V/2.5Ah
battery. A connector lies on the front panel of the box and is used for plugging in the battery
charger jack (the battery charger is included in the standard kit), so that the charging of the
battery could be carried out when needed.
The intermediate connecting rod is made from aluminum. At its upper end it is connected by
the fixating ring to the carrier rod – it fits into it, while at its lower end it is connected to the
lower connecting rod.
The lower connecting rod is made from wood, so that it does not interfere with the normal
working mode of the metal detector. The upper end is thinner and has an aperture to be
attached to the intermediate connecting rod via the metal bolt and nut. The lower end has a
bigger aperture, so that the search coil could be attached.
The search coil is connected to the lower connecting rod via the plastic bolt and nut. The
search coil has a connecting screened cable ending in a jack that is plugged in the connector
that lies on the back panel of the electronic control module.
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7. Devi e assembling and disassembling
The metal detector BLISSTOOL LTC42 is assembled in the following se uence:
1. The lower connecting rod is attached to the lower part of intermediate connecting rod
via the metal bolt and nut.
For that purpose, the lower connecting rod is driven into the lower part of the
intermediate connecting rod until the two apertures has matched and formed a channel.
The bolt is placed into the channel, pressed with a thumb while the metal wing nut is
tightly fastened with the other hand.
2. The upper part of the intermediate connecting rod is attached to the carrier rod via the
fixating ring, and adjusted at the appropriate height.
It is recommended that the mounting of the intermediate connecting rod to the carrier
rod should be carried out, following the se uence below:
–the fixating ring has to be unscrewed loose from the carrier rod and put on the
intermediate connecting rod;
–the intermediate connecting rod is inserted in the carrier rod at the appropriate
height;
–the fixating ring is tightened until it is fixed.
. The search coil has to be adjusted horizontally against the ground surface, while the
user is in an upright (working) position and is holding the metal detector by the handle.
This adjustment is possible, if the plastic bolt and nut used for assembling the search coil
with the lower connecting rod are not tightly fastened.
4. The connecting screened cable of the search coil is winded uniformly up the lower and
intermediate connecting rods and the end jack of the cable is plugged in and tightened on
the connector that lies on the back panel of the electronic control module.
The cable, at its lower end near the search coil, has to be slightly loose, so that it is not
damaged when the search coil has been bent against the lower connecting rod, for
example when the device is folded for carrying and transporting.
The coil cable ends with a jack and there is a single correct position for it so that it could
be plugged in the coil connector, which lies on the back panel of the electronic control
module. In this position, the “hollow” cursor of the jack falls in with “flange” cursor of the
connector, and when inserted, the jack enters the connector into a depth of around 10
mm. After the jack is plugged in, it is screwed to the connector by the means of the
available metal stopping nut, used as a shield.
The incorrect insertion and/or the application of a brute force while incorrectly inserting
the jack could lead to damaging the metal detector.
The plugging in and out of the jack is done while the metal detector is switched off
(VOLUME/POWER knob is turned in “OFF” position (Fig.3)).
The disassembling of the device is carried in a reversed order.
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8. Control, adjustment and indi ation applian es
The control, adjustment and indication appliances lie on the front (Fig.3) and the back panel of
the electronic control module.
Description of the particular appliances:
1. VOLUME/POWER knob:
- It serves for both switching on/switching off the metal detector and adjusting the audio
volume control. The chosen position from the knob scale (usually between the 3rd and
the 5th level) should correspond to pleasant sounds made by the metal detector, i.e.
that are neither loud, nor uiet.
2. THRESHOLD knob:
- It serves for assigning the necessary audio threshold. It is adjusted with no metal
objects around the metal detector’s search coil and depends on the terrain. The best
depth for finding metal objects is achieved, when the THRESHOLD knob is turned in a
position, corresponding to a uiet “buzzing” sound made by the metal detector in
working mode (makes recurring sound). This mode is suitable for experienced seekers.
The beginners should work at lower levels.
3. NOTCH LEVEL knob:
- It serves for adjusting the detection/rejection level of the contemporary non-ferrous
pollutants (aluminum, bottle/jar covers, foil, silver-paper) and determines the metal
detector’s responses when detecting an iron.
For levels between “0” and “2”, the metal detector detects both non-ferrous and ferrous
metals, and when detecting ferrous metal (iron) it makes double recurring sound, while
when detecting non-ferrous metal – single non-pausing sound. The device detects the
contemporary non-ferrous pollutants (aluminum, bottle/jar covers, foil, silver-paper) at a
varied degree when turned to levels from “6” to “10” and rejects them fully when turned
to level “10” (either detects them when they are shallowly buried or does not detect
them at all).
4. DISCR LEVEL knob:
- It serves for adjusting the detection/rejection level of iron, usually when NOTCH LEVEL
knob is turned to levels from “6” to “10” and for adjusting the depth of discrimination
(the maximum depth to which the metal detector distinguish the metals).
In “0” position, the metal detector makes unaltered sound for all metals, i.e. it does not
distinguish them.
When the level is turned to a higher position, the metal detector starts to distinguish the
metals, and each successive level betters the discrimination, i.e. at level “10”, the metal
detector rejects the iron at an utmost degree and has the maximum depth of
discrimination.
When detecting non-ferrous metals (copper, bronze, silver, gold) it makes deep-toned,
non-pausing sound, while for the ferrous metals (iron) the sound is pausing (recurring).
For levels from “5” to “10”, the metal detector rejects the iron objects at a different
level, i.e. when detecting iron or tin-foil object it is making either no sound or a uiet
pop sound.
The most practical working mode, when searching for non-ferrous metals, are the levels
from “6” to “8”. When detecting unstable (whether its corresponding to a real object)
signal - usually for heavily corroded iron or iron with alloys, the level could be turned to
“10” in order to get more accurate signal discrimination. The surface sweeping of the
particular terrain could contribute to the further improvement of the detecting, because it
results in shortening the distance to the buried detected object.
5. Loudspeaker:
- It serves for producing a sound when an object is detected. The sound is deep-toned
and non-pausing for non-ferrous metals and recurring (repeating) for ferrous metals
(iron). The loudspeaker lies on the back panel of the electronic control module.
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6. PHONES jack:
- If necessary, the stereo headphones with 3.5mm jack could be plugged in the PHONES
jack. When the headphones are plugged in, the loudspeaker is switched off automatically
and the metal detector’s sound could be heard only in the headphones.
7. BAT LOW light indicator:
- It indicates the current charge of the battery. The indicator lits up when the battery is
exhausted. It is recommended that the metal detector should not be used in this mode,
as it would not work properly. The charging of the battery should be carried according to
the description in 11.
Fig. / Control, adjustment and indication appliances of BLISSTOOL LTC42
9. Devi e adjustment and preparation for work
The metal detector is ready for use when the battery is charged (the BAT LOW indicator is not
lit up).
Before the initial usage, please charge the battery for minimum of 8 hours, by using the
automatic battery charger available in the standard kit, according to the description in 11.
The built-in battery ensures up to 48 working hours without recharging.
After the metal detector is assembled according to the description in 7, it can be turned on via
turning the VOLUME/POWER knob from left (position OFF) to right.
This knob also serves for adjusting the desired audio volume control.
The discrimination level and depth of discrimination (for distinguishing the metals) is adjusted
by both the NOTCH LEVEL and DISCR LEVEL knob according to the description in 8.
If the aim is detecting all metals (ferrous and non-ferrous), the NOTCH LEVEL has to be turned
to levels between “0” and “4”, while the DISCR LEVEL has to be turned to level “0”.
In cases when the aim is ignoring of ferrous metals (detecting only non-ferrous metals), the
DISCR LEVEL has to be turned to levels between “8” and “10”, while the NOTCH LEVEL has to
be turned to levels between “6” and “10”. At higher levels, the heavily corroded iron is ignored
at an utmost degree.
And lastly, the THRESHOLD knob adjusts the audio threshold to the desired level.
With this, the metal detector is adjusted and ready for work.
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10. Sear h method
The metal detector searches while being moved, i.e. it reacts to a metal object buried in the
ground only when the search coil is swung above it.
Searching for metal objects is actually moving the search coil above the ground surface.
While doing this, the search coil has to be held parallel towards the ground surface and at a
minimum distance above it. The more lifted the coil, the less deeply the search.
The search consists of a uniform and
slow swinging of the coil one side to
another, while the user holds the
metal detector’s handle and uses the
armrest for support.
Too fast or too slow moving of the coil
could result in shortening the search
depth, especially for deeply buried or
small objects.
The search coil path during the search
resembles a zigzag movement, which
is a result from the uniform and slow
swinging of the coil one side to
another while the user is moving
forward.
The swing’s breadth and the user’s
speed are chosen according to the
terrain, the sloping and the size of the
area to be searched.
During swinging the user should avoid
hitting the search coil in the available
objects on the terrain (stones, tree
roots and tree parts, uneven ground,
etc.)
The precise location of the detected object is determined by moving the search coil in two
perpendicular axes, while the user stands still or turns round for detecting the signal from
different sides.
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11. Battery harging
The metal detector BLISSTOOL LTC42 has 12V/2.5Ah NiMH battery that is placed inside the
power supply module. The battery has around 500 charging/discharging cycles (battery “life”),
after which its capacitance drops sharply and must be replaced with a new battery.
The battery charging has to be done only by the automatic battery charger BLISSTOOL
DA12250 (~220/12V, 250mA) that is included in the standard kit.
The specified battery charger is designed to ensure the uality and safety during the battery
charging process.
To charge the battery, plug in the battery charger jack into the connector that lies on the front
panel of the power supply module. Then the battery charger contact-plug is plugged into the
~220V circuit.
The charging continues from 3 to 12 hours, depending on the battery level of discharge.
It is not re uired to keep a close watch on the charging process, as the charger is automatic
and after the battery charging is finished it switches to a stand-by mode, which protects the
battery from over-charging.
The green light indicator lits up when the battery charger is plugged in ~220V circuit, which
indicates that the charger is working properly.
The charging process and the charging stages are indicated with the different light intensity of
the red light indicator – when the battery is discharged, it is either out or is dimly lit up, while
during the charging process the intensity is increased, resulting in a bright intensity when fully
charged.
After the charging process has been finished, the battery charger should be switched off
following the reversed order: plugging off the ~220V circuit by pulling out the power supply
contact-plug from the wall-plug, then the battery charger jack is plugged off.
During charging, the metal detector should be switched off. Switching on the detector while
being charged could cause serious damage to the electronic control module or to decrease the
detector’s search uality.
The built-in battery does not need any further maintenance besides being charged.
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12. Pra ti al re ommendations
One of the most important components of the metal detector is the search coil, which to a
great extend determines the device’s sensitivity.
When the metal detector is carried, for example in a rucksack or a travelling bag, an
exceptional care should be taken to avoid the bending of the coil cable near the muff at the
base of the search coil. That may result in tearing the cable connecting cores and damaging of
the search coil and the metal detector.
When necessary, the search coil, the electronic control module box and the power supply
module box could be cleaned with wet cloth. Do not use detergents as they may damage the
plastic parts or the inscription on the front panel of the electronic control module.
The electronic control module and the search coil are very sensitive towards sudden
environmental temperature alterations. When there is a sudden temperature change, the user
should wait usually 25-30 minutes before switching on the metal detector.
While working with the metal detector, the search coil should be protected from damage (hit).
The usage of the metal detector in a rainy day may result in its damage.
The metal detector could be safely and properly used, if there is morning dew (because of the
watertight search coil). An extensive care should be taken, if the detector is put on the ground,
especially on a wet grass, as the water should not be allowed to get inside the electronic
control module box and the power supply module box.
The electronic control module and the power supply module are not watertight and a serious
damage would be caused to the metal detector, if water gets inside them.
If you are searching in areas, where ammunitions or other explosive substances may be
detected, be extremely careful when excavating, because we do not carry the responsibility for
your actions and behavior.
Do not open the electronic control module box and the power supply module box. If this is
necessary, please contact us, using the contact information, given in 15, so that we could
provide the appropriate technical support.
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13. Te hni al maintenan e and servi e support during
guarantee
The metal detector BLISSTOOL LTC42 has a 3-year guarantee for the uality of the produced
components and in case of any factory flaws.
The warranty excludes the battery and is not valid for mechanical damages of the respective
components and for damages done by an incorrect usage or unauthorized access and repair
(opening the electric control module; opening the power supply module; wearing, force
opening or damaging of the carrier construction, the search coil, the cable or the jack for the
coil; incorrect plugging of the search coil; damaging the detector due to connecting to
incompatible search coils, batteries, battery chargers and headphones).
To be a subject of a repair under guarantee, a device should be delivered to any of our
authorized service support offices. The customer must pay all delivery and transport expenses.
In order to protect the metal detector from a damage, it is desirable that the transport of the
device should be carried out in its original purchase box (included in the standard kit), since it
is optimized for a safe storage and transport.
The serial number and the purchase date, written on the guarantee certificate, verify the
guarantee.
For further details and information regarding the technical maintenance and service support
both for devices with current or expired guarantee, please contact us by using the contact
information, given in 15.
14. Legislation
The possession of a metal detector is completely legal, as long as you comply with the existing
legislation. That is why we recommend you to avoid searching in a private property, national
parks and archaeological reserves.
15. Conta t information
BLISSTOOL
web site: www.blisstool.com
Email: [email protected]
GSM: [phone]
Skype: blisstool
ooVoo: blisstool
2007 - 2008 © BLISSTOOL
ALL RIGHTS RESERVED
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